WO2023163026A1 - ビスフェノールの製造方法、再生ポリカーボネート樹脂の製造方法、エポキシ樹脂の製造方法、エポキシ樹脂硬化物の製造方法及びビスフェノール-炭酸アルキル縮合体の製造方法 - Google Patents
ビスフェノールの製造方法、再生ポリカーボネート樹脂の製造方法、エポキシ樹脂の製造方法、エポキシ樹脂硬化物の製造方法及びビスフェノール-炭酸アルキル縮合体の製造方法 Download PDFInfo
- Publication number
- WO2023163026A1 WO2023163026A1 PCT/JP2023/006417 JP2023006417W WO2023163026A1 WO 2023163026 A1 WO2023163026 A1 WO 2023163026A1 JP 2023006417 W JP2023006417 W JP 2023006417W WO 2023163026 A1 WO2023163026 A1 WO 2023163026A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bisphenol
- polycarbonate resin
- decomposition
- reaction
- epoxy resin
- Prior art date
Links
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 title claims abstract description 417
- 239000004431 polycarbonate resin Substances 0.000 title claims abstract description 382
- 229920005668 polycarbonate resin Polymers 0.000 title claims abstract description 382
- 229930185605 Bisphenol Natural products 0.000 title claims abstract description 280
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 204
- 239000003822 epoxy resin Substances 0.000 title claims description 274
- 229920000647 polyepoxide Polymers 0.000 title claims description 274
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 271
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 154
- 125000001931 aliphatic group Chemical group 0.000 claims abstract description 108
- -1 alkali metal alkoxide Chemical class 0.000 claims abstract description 98
- 239000003054 catalyst Substances 0.000 claims abstract description 80
- 239000012295 chemical reaction liquid Substances 0.000 claims abstract description 46
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims abstract description 41
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims abstract description 41
- 150000003973 alkyl amines Chemical class 0.000 claims abstract description 31
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 27
- 229910000288 alkali metal carbonate Inorganic materials 0.000 claims abstract description 26
- 150000008041 alkali metal carbonates Chemical class 0.000 claims abstract description 26
- 229910000272 alkali metal oxide Inorganic materials 0.000 claims abstract description 22
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims description 209
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 151
- 239000000203 mixture Substances 0.000 claims description 126
- 238000000034 method Methods 0.000 claims description 101
- 239000007788 liquid Substances 0.000 claims description 81
- 239000002994 raw material Substances 0.000 claims description 75
- 239000002002 slurry Substances 0.000 claims description 70
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical group COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 63
- 239000003795 chemical substances by application Substances 0.000 claims description 62
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 51
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 48
- 229920000515 polycarbonate Polymers 0.000 claims description 42
- 239000004417 polycarbonate Substances 0.000 claims description 42
- 150000002440 hydroxy compounds Chemical class 0.000 claims description 34
- 238000002156 mixing Methods 0.000 claims description 31
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 29
- 125000003118 aryl group Chemical group 0.000 claims description 19
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 18
- 125000000217 alkyl group Chemical group 0.000 claims description 18
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 16
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 13
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 13
- 125000004432 carbon atom Chemical group C* 0.000 claims description 11
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 11
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 9
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 claims description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical group [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- 239000006227 byproduct Substances 0.000 claims description 8
- QLVWOKQMDLQXNN-UHFFFAOYSA-N dibutyl carbonate Chemical compound CCCCOC(=O)OCCCC QLVWOKQMDLQXNN-UHFFFAOYSA-N 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 7
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 6
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 claims description 6
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 6
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 6
- 235000011181 potassium carbonates Nutrition 0.000 claims description 6
- MGAXYKDBRBNWKT-UHFFFAOYSA-N (5-oxooxolan-2-yl)methyl 4-methylbenzenesulfonate Chemical group C1=CC(C)=CC=C1S(=O)(=O)OCC1OC(=O)CC1 MGAXYKDBRBNWKT-UHFFFAOYSA-N 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 235000017550 sodium carbonate Nutrition 0.000 claims description 4
- 230000003301 hydrolyzing effect Effects 0.000 claims description 3
- 239000011736 potassium bicarbonate Substances 0.000 claims description 3
- 229910000028 potassium bicarbonate Inorganic materials 0.000 claims description 3
- 235000015497 potassium bicarbonate Nutrition 0.000 claims description 3
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 claims description 3
- 229940086066 potassium hydrogencarbonate Drugs 0.000 claims description 3
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 claims description 3
- 229910001950 potassium oxide Inorganic materials 0.000 claims description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical group [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 3
- 229910001948 sodium oxide Inorganic materials 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims 1
- 230000009257 reactivity Effects 0.000 abstract description 5
- 239000000243 solution Substances 0.000 description 167
- 238000001723 curing Methods 0.000 description 82
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 59
- 229920005989 resin Polymers 0.000 description 34
- 239000011347 resin Substances 0.000 description 34
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 33
- 238000004128 high performance liquid chromatography Methods 0.000 description 28
- 239000000047 product Substances 0.000 description 26
- 239000007787 solid Substances 0.000 description 26
- 150000001875 compounds Chemical class 0.000 description 25
- 238000003756 stirring Methods 0.000 description 23
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 21
- 230000035484 reaction time Effects 0.000 description 21
- 238000002360 preparation method Methods 0.000 description 19
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 18
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 18
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 16
- 238000004821 distillation Methods 0.000 description 16
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
- 150000002989 phenols Chemical class 0.000 description 15
- 239000007822 coupling agent Substances 0.000 description 14
- 238000002425 crystallisation Methods 0.000 description 14
- 230000008025 crystallization Effects 0.000 description 14
- 238000006386 neutralization reaction Methods 0.000 description 14
- 229920003986 novolac Polymers 0.000 description 14
- 238000011084 recovery Methods 0.000 description 14
- 239000002904 solvent Substances 0.000 description 14
- 229920003023 plastic Polymers 0.000 description 13
- 239000004033 plastic Substances 0.000 description 13
- 239000012299 nitrogen atmosphere Substances 0.000 description 12
- 238000007254 oxidation reaction Methods 0.000 description 12
- 150000008065 acid anhydrides Chemical class 0.000 description 11
- ROORDVPLFPIABK-UHFFFAOYSA-N diphenyl carbonate Chemical compound C=1C=CC=CC=1OC(=O)OC1=CC=CC=C1 ROORDVPLFPIABK-UHFFFAOYSA-N 0.000 description 11
- 125000003700 epoxy group Chemical group 0.000 description 11
- 238000004817 gas chromatography Methods 0.000 description 11
- 150000002460 imidazoles Chemical class 0.000 description 11
- 239000000463 material Substances 0.000 description 11
- 239000003960 organic solvent Substances 0.000 description 11
- 239000005011 phenolic resin Substances 0.000 description 11
- 229920000642 polymer Polymers 0.000 description 11
- 150000003512 tertiary amines Chemical class 0.000 description 11
- 239000002253 acid Substances 0.000 description 10
- 238000006136 alcoholysis reaction Methods 0.000 description 10
- 150000001412 amines Chemical class 0.000 description 10
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 description 10
- 239000003921 oil Substances 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 10
- 230000003647 oxidation Effects 0.000 description 10
- 150000003839 salts Chemical class 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 9
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 9
- 239000007983 Tris buffer Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 9
- 239000008188 pellet Substances 0.000 description 9
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 9
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 9
- 230000002035 prolonged effect Effects 0.000 description 9
- 239000002699 waste material Substances 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 150000001408 amides Chemical class 0.000 description 8
- 239000011521 glass Substances 0.000 description 8
- 239000011256 inorganic filler Substances 0.000 description 8
- 229910003475 inorganic filler Inorganic materials 0.000 description 8
- 150000003003 phosphines Chemical class 0.000 description 8
- 238000005406 washing Methods 0.000 description 8
- 238000004090 dissolution Methods 0.000 description 7
- 125000000524 functional group Chemical group 0.000 description 7
- 238000006116 polymerization reaction Methods 0.000 description 7
- 238000005809 transesterification reaction Methods 0.000 description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 6
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 6
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 6
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 6
- 239000004305 biphenyl Substances 0.000 description 6
- 235000010290 biphenyl Nutrition 0.000 description 6
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 description 6
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 6
- 239000000155 melt Substances 0.000 description 6
- 238000000746 purification Methods 0.000 description 6
- 238000004064 recycling Methods 0.000 description 6
- XFNJVJPLKCPIBV-UHFFFAOYSA-N trimethylenediamine Chemical compound NCCCN XFNJVJPLKCPIBV-UHFFFAOYSA-N 0.000 description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 5
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 5
- 239000004721 Polyphenylene oxide Substances 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 5
- 238000009835 boiling Methods 0.000 description 5
- 239000000460 chlorine Substances 0.000 description 5
- 229910052801 chlorine Inorganic materials 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 239000003063 flame retardant Substances 0.000 description 5
- 150000002334 glycols Chemical class 0.000 description 5
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 5
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 5
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 5
- 229920000570 polyether Polymers 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- KVNYFPKFSJIPBJ-UHFFFAOYSA-N 1,2-diethylbenzene Chemical compound CCC1=CC=CC=C1CC KVNYFPKFSJIPBJ-UHFFFAOYSA-N 0.000 description 4
- BBMCTIGTTCKYKF-UHFFFAOYSA-N 1-heptanol Chemical compound CCCCCCCO BBMCTIGTTCKYKF-UHFFFAOYSA-N 0.000 description 4
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 description 4
- FVKFHMNJTHKMRX-UHFFFAOYSA-N 3,4,6,7,8,9-hexahydro-2H-pyrimido[1,2-a]pyrimidine Chemical compound C1CCN2CCCNC2=N1 FVKFHMNJTHKMRX-UHFFFAOYSA-N 0.000 description 4
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 4
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 4
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 4
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 4
- 150000001298 alcohols Chemical class 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 150000001339 alkali metal compounds Chemical class 0.000 description 4
- 150000001340 alkali metals Chemical class 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 150000008064 anhydrides Chemical class 0.000 description 4
- 239000008346 aqueous phase Substances 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 238000006482 condensation reaction Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 description 4
- MWKFXSUHUHTGQN-UHFFFAOYSA-N decan-1-ol Chemical compound CCCCCCCCCCO MWKFXSUHUHTGQN-UHFFFAOYSA-N 0.000 description 4
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 4
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 4
- 235000019256 formaldehyde Nutrition 0.000 description 4
- LEQAOMBKQFMDFZ-UHFFFAOYSA-N glyoxal Chemical compound O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 description 4
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 4
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- ZWRUINPWMLAQRD-UHFFFAOYSA-N nonan-1-ol Chemical compound CCCCCCCCCO ZWRUINPWMLAQRD-UHFFFAOYSA-N 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 239000002798 polar solvent Substances 0.000 description 4
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 4
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 4
- 229920001187 thermosetting polymer Polymers 0.000 description 4
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical compound C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 description 4
- KJIOQYGWTQBHNH-UHFFFAOYSA-N undecanol Chemical compound CCCCCCCCCCCO KJIOQYGWTQBHNH-UHFFFAOYSA-N 0.000 description 4
- 239000008096 xylene Substances 0.000 description 4
- OWEYKIWAZBBXJK-UHFFFAOYSA-N 1,1-Dichloro-2,2-bis(4-hydroxyphenyl)ethylene Chemical compound C1=CC(O)=CC=C1C(=C(Cl)Cl)C1=CC=C(O)C=C1 OWEYKIWAZBBXJK-UHFFFAOYSA-N 0.000 description 3
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 3
- KJCVRFUGPWSIIH-UHFFFAOYSA-N 1-naphthol Chemical compound C1=CC=C2C(O)=CC=CC2=C1 KJCVRFUGPWSIIH-UHFFFAOYSA-N 0.000 description 3
- CZAZXHQSSWRBHT-UHFFFAOYSA-N 2-(2-hydroxyphenyl)-3,4,5,6-tetramethylphenol Chemical compound OC1=C(C)C(C)=C(C)C(C)=C1C1=CC=CC=C1O CZAZXHQSSWRBHT-UHFFFAOYSA-N 0.000 description 3
- 125000000022 2-aminoethyl group Chemical group [H]C([*])([H])C([H])([H])N([H])[H] 0.000 description 3
- ZTMADXFOCUXMJE-UHFFFAOYSA-N 2-methylbenzene-1,3-diol Chemical compound CC1=C(O)C=CC=C1O ZTMADXFOCUXMJE-UHFFFAOYSA-N 0.000 description 3
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 3
- ZCUJYXPAKHMBAZ-UHFFFAOYSA-N 2-phenyl-1h-imidazole Chemical compound C1=CNC(C=2C=CC=CC=2)=N1 ZCUJYXPAKHMBAZ-UHFFFAOYSA-N 0.000 description 3
- RGHHSNMVTDWUBI-UHFFFAOYSA-N 4-hydroxybenzaldehyde Chemical compound OC1=CC=C(C=O)C=C1 RGHHSNMVTDWUBI-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical class O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- GTDPSWPPOUPBNX-UHFFFAOYSA-N ac1mqpva Chemical compound CC12C(=O)OC(=O)C1(C)C1(C)C2(C)C(=O)OC1=O GTDPSWPPOUPBNX-UHFFFAOYSA-N 0.000 description 3
- 229910001413 alkali metal ion Inorganic materials 0.000 description 3
- 150000001409 amidines Chemical class 0.000 description 3
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- ZETYUTMSJWMKNQ-UHFFFAOYSA-N n,n',n'-trimethylhexane-1,6-diamine Chemical compound CNCCCCCCN(C)C ZETYUTMSJWMKNQ-UHFFFAOYSA-N 0.000 description 1
- KVKFRMCSXWQSNT-UHFFFAOYSA-N n,n'-dimethylethane-1,2-diamine Chemical compound CNCCNC KVKFRMCSXWQSNT-UHFFFAOYSA-N 0.000 description 1
- DIHKMUNUGQVFES-UHFFFAOYSA-N n,n,n',n'-tetraethylethane-1,2-diamine Chemical compound CCN(CC)CCN(CC)CC DIHKMUNUGQVFES-UHFFFAOYSA-N 0.000 description 1
- DMQSHEKGGUOYJS-UHFFFAOYSA-N n,n,n',n'-tetramethylpropane-1,3-diamine Chemical compound CN(C)CCCN(C)C DMQSHEKGGUOYJS-UHFFFAOYSA-N 0.000 description 1
- YYHPPOGFPXBRRX-UHFFFAOYSA-N n,n-dichloro-1-[4-[(dichloroamino)methyl]phenyl]methanamine Chemical compound ClN(Cl)CC1=CC=C(CN(Cl)Cl)C=C1 YYHPPOGFPXBRRX-UHFFFAOYSA-N 0.000 description 1
- UQUPIHHYKUEXQD-UHFFFAOYSA-N n,n′-dimethyl-1,3-propanediamine Chemical compound CNCCCNC UQUPIHHYKUEXQD-UHFFFAOYSA-N 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- RIWRFSMVIUAEBX-UHFFFAOYSA-N n-methyl-1-phenylmethanamine Chemical compound CNCC1=CC=CC=C1 RIWRFSMVIUAEBX-UHFFFAOYSA-N 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 238000006384 oligomerization reaction Methods 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 150000002903 organophosphorus compounds Chemical class 0.000 description 1
- 238000001139 pH measurement Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- RUOPINZRYMFPBF-UHFFFAOYSA-N pentane-1,3-diol Chemical compound CCC(O)CCO RUOPINZRYMFPBF-UHFFFAOYSA-N 0.000 description 1
- GLOBUAZSRIOKLN-UHFFFAOYSA-N pentane-1,4-diol Chemical compound CC(O)CCCO GLOBUAZSRIOKLN-UHFFFAOYSA-N 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 150000003018 phosphorus compounds Chemical class 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 229920001281 polyalkylene Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 230000037048 polymerization activity Effects 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000909 polytetrahydrofuran Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- RPDAUEIUDPHABB-UHFFFAOYSA-N potassium ethoxide Chemical compound [K+].CC[O-] RPDAUEIUDPHABB-UHFFFAOYSA-N 0.000 description 1
- BDAWXSQJJCIFIK-UHFFFAOYSA-N potassium methoxide Chemical compound [K+].[O-]C BDAWXSQJJCIFIK-UHFFFAOYSA-N 0.000 description 1
- LPNYRYFBWFDTMA-UHFFFAOYSA-N potassium tert-butoxide Chemical compound [K+].CC(C)(C)[O-] LPNYRYFBWFDTMA-UHFFFAOYSA-N 0.000 description 1
- ZGJADVGJIVEEGF-UHFFFAOYSA-M potassium;phenoxide Chemical compound [K+].[O-]C1=CC=CC=C1 ZGJADVGJIVEEGF-UHFFFAOYSA-M 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 150000003141 primary amines Chemical class 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 125000006239 protecting group Chemical group 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 150000004053 quinones Chemical class 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- QDRKDTQENPPHOJ-UHFFFAOYSA-N sodium ethoxide Chemical compound [Na+].CC[O-] QDRKDTQENPPHOJ-UHFFFAOYSA-N 0.000 description 1
- 238000003797 solvolysis reaction Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000001256 steam distillation Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- TXDNPSYEJHXKMK-UHFFFAOYSA-N sulfanylsilane Chemical class S[SiH3] TXDNPSYEJHXKMK-UHFFFAOYSA-N 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- HWCKGOZZJDHMNC-UHFFFAOYSA-M tetraethylammonium bromide Chemical compound [Br-].CC[N+](CC)(CC)CC HWCKGOZZJDHMNC-UHFFFAOYSA-M 0.000 description 1
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- GQIUQDDJKHLHTB-UHFFFAOYSA-N trichloro(ethenyl)silane Chemical compound Cl[Si](Cl)(Cl)C=C GQIUQDDJKHLHTB-UHFFFAOYSA-N 0.000 description 1
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 description 1
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000005050 vinyl trichlorosilane Substances 0.000 description 1
- UKRDPEFKFJNXQM-UHFFFAOYSA-N vinylsilane Chemical class [SiH3]C=C UKRDPEFKFJNXQM-UHFFFAOYSA-N 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B61/00—Other general methods
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/01—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by replacing functional groups bound to a six-membered aromatic ring by hydroxy groups, e.g. by hydrolysis
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/01—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by replacing functional groups bound to a six-membered aromatic ring by hydroxy groups, e.g. by hydrolysis
- C07C37/055—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by replacing functional groups bound to a six-membered aromatic ring by hydroxy groups, e.g. by hydrolysis the substituted group being bound to oxygen, e.g. ether group
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/50—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by reactions decreasing the number of carbon atoms
- C07C37/52—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by reactions decreasing the number of carbon atoms by splitting polyaromatic compounds, e.g. polyphenolalkanes
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C39/00—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring
- C07C39/02—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring monocyclic with no unsaturation outside the aromatic ring
- C07C39/06—Alkylated phenols
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C39/00—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring
- C07C39/12—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring polycyclic with no unsaturation outside the aromatic rings
- C07C39/15—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring polycyclic with no unsaturation outside the aromatic rings with all hydroxy groups on non-condensed rings, e.g. phenylphenol
- C07C39/16—Bis-(hydroxyphenyl) alkanes; Tris-(hydroxyphenyl)alkanes
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C68/00—Preparation of esters of carbonic or haloformic acids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C68/00—Preparation of esters of carbonic or haloformic acids
- C07C68/06—Preparation of esters of carbonic or haloformic acids from organic carbonates
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/96—Esters of carbonic or haloformic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/02—Polycondensates containing more than one epoxy group per molecule
- C08G59/04—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof
- C08G59/06—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
- C08G59/22—Di-epoxy compounds
- C08G59/24—Di-epoxy compounds carbocyclic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/04—Aromatic polycarbonates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Definitions
- the present invention relates to a method for producing bisphenol and a method for producing a bisphenol-alkyl carbonate condensate. More specifically, it relates to a method for producing bisphenol and a method for producing a bisphenol-alkyl carbonate condensate utilizing decomposition of polycarbonate resin. Furthermore, the present invention relates to a method for producing a recycled polycarbonate resin and a method for producing an epoxy resin using the bisphenol obtained by the method for producing bisphenol. The present invention also relates to a method for producing a cured epoxy resin using the epoxy resin obtained by the method for producing an epoxy resin.
- plastic is easy, durable, and inexpensive, it is mass-produced not only in Japan but around the world. Many of these plastics are used as "disposables" and some are not properly disposed of and end up in the environment. Specifically, plastic waste flows from rivers into the sea, where it is degraded by waves and ultraviolet rays and becomes less than 5 mm. These small pieces of plastic waste are called microplastics. Animals and fish accidentally ingest these microplastics. In this way, plastic waste has a tremendous impact on the ecosystem, and in recent years, it has become a problem all over the world as the marine plastic problem. Polycarbonate resins are used in a wide range of fields due to their transparency, mechanical properties, flame retardancy, dimensional stability, and electrical properties, and this polycarbonate resin is no exception.
- Patent Document 1 an aromatic polycarbonate dissolved in a monohydroxy compound other than methanol is catalytically transesterified with methanol in a distillation column to continuously form a dihydroxy compound and dimethyl carbonate.
- a method for systematically opening the ring is disclosed.
- Patent Document 2 a specific tertiary amine is added as a catalyst to a solution in which waste plastic and monohydric alcohols or monohydric phenols are present, and the polycarbonate resin in the waste plastic is and a step of recovering the decomposition products as useful substances.
- Non-Patent Document 1 discloses a method for obtaining bisphenol A as a reaction solution by subjecting a polycarbonate resin to methanolysis using a guanidine derivative or an amidine derivative as a catalyst.
- Non-Patent Document 2 discloses methanolysis of a polycarbonate resin using methyl carbonate (tetramethylammonium) as a catalyst.
- Aliphatic monoalcohols are usually used in the decomposition method using alcoholysis of polycarbonate resin.
- alcoholysis of polycarbonate resin In order to dissolve the polycarbonate resin and improve the decomposition rate, it is necessary to carry out the reaction under high pressure conditions at a high decomposition temperature. had to use.
- Example 1 of Patent Document 1 a polycarbonate resin is dissolved in phenol at 150° C. and decomposed by countercurrent contact with vapors composed of methanol and dimethyl carbonate.
- the control of the apparatus is complicated and the decomposition control of the polycarbonate resin is difficult.
- Non-Patent Document 1 uses a guanidine derivative or an amidine derivative as a catalyst to decompose the polycarbonate resin.
- guanidine derivatives and amidine derivatives cannot be easily removed by washing with water because they have a high affinity for both oil and water.
- these compounds have high boiling points of 150° C. or higher, they are not easily distilled off.
- these compounds are lightly colored yellow, it is necessary to perform column chromatography purification and extraction using diethyl ether with a low flash point for purification. Therefore, in order to obtain bisphenol A from a polycarbonate resin, there is a problem that it is industrially unsuitable because it is necessary to take complicated steps.
- Non-Patent Document 2 also requires the use of a special catalyst, and like the method of Non-Patent Document 1, it is necessary to take complicated steps to obtain bisphenol A from a polycarbonate resin. There was a problem that it was unsuitable for
- bisphenol A is also used as a raw material for optical materials such as optical polycarbonate resin in some fields. Since optical materials are required to have excellent color tone (transparency), bisphenol A, which is a raw material thereof, is also required to have excellent color tone.
- the present invention has been made in view of such circumstances, and can decompose a polycarbonate resin with high reactivity using a highly versatile catalyst even under mild conditions with a small environmental load. It is an object of the present invention to provide a method for producing bisphenol which produces bisphenol with good color tone by using a decomposition method. A further object of the present invention is to provide a method for producing a recycled polycarbonate resin and a method for producing an epoxy resin using the obtained bisphenol. Another object of the present invention is to provide a method for producing a cured epoxy resin using the epoxy resin obtained by the method for producing an epoxy resin.
- Another object of the present invention is to provide a method for producing a bisphenol-alkyl carbonate condensate by utilizing the decomposition method for decomposing the polycarbonate resin.
- the present inventors have found a decomposition method of decomposing a polycarbonate resin by using a general-purpose catalyst in combination with a dialkyl carbonate and an aliphatic monoalcohol.
- a method for producing bisphenol was found using the decomposition method of the polycarbonate resin.
- a method for producing a recycled polycarbonate resin and a method for producing an epoxy resin using the obtained bisphenol have been found.
- the inventors have found a method for producing a cured epoxy resin using the epoxy resin obtained by the method for producing an epoxy resin.
- a method for producing a bisphenol-alkyl carbonate condensate was found. That is, the present invention relates to the following inventions.
- a method for producing bisphenol by performing a decomposition reaction of the polycarbonate resin in a reaction solution containing a polycarbonate resin, a dialkyl carbonate, an aliphatic monoalcohol, and a catalyst, wherein the bisphenol is derived from the bisphenol of the polycarbonate resin used in the decomposition reaction.
- the molar ratio of the dialkyl carbonate used in the decomposition reaction to 1 mol of the repeating unit is 1.8 or more
- the catalyst is an alkali metal hydroxide, an alkali metal carbonate, an alkali metal alkoxide, an alkali metal oxide, a chain
- ⁇ 2> The method for producing bisphenol according to ⁇ 1>, wherein the reaction liquid is in the form of a slurry.
- ⁇ 3> The method for producing bisphenol according to ⁇ 1> or ⁇ 2>, wherein the dialkyl carbonate contains a dialkyl carbonate not derived from the polycarbonate resin.
- ⁇ 4> The method for producing bisphenol according to any one of ⁇ 1> to ⁇ 3>, wherein the reaction liquid is prepared by mixing the polycarbonate resin, the dialkyl carbonate, the aliphatic monoalcohol, and the catalyst. .
- the alkali metal hydroxide is sodium hydroxide or potassium hydroxide
- the alkali metal carbonate is sodium carbonate, potassium carbonate, sodium hydrogen carbonate or potassium hydrogen carbonate
- the alkali metal alkoxide is The method for producing bisphenol according to any one of ⁇ 1> to ⁇ 4>, wherein the alkali metal oxide is sodium phenoxide or sodium methoxide, and the alkali metal oxide is sodium oxide or potassium oxide.
- ⁇ 6> The method for producing bisphenol according to any one of ⁇ 1> to ⁇ 5>, wherein the chain alkylamine is represented by the following formula (I) or the following formula (II).
- R A represents an alkyl group having 1 to 3 carbon atoms
- R B to R C each independently represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms.
- R D to R G each independently represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms
- m represents an integer of 1 to 6.
- ⁇ 8> The method for producing bisphenol according to any one of ⁇ 1> to ⁇ 7>, wherein the bisphenol is 2,2-bis(4-hydroxyphenyl)propane.
- ⁇ 9> The method for producing bisphenol according to any one of ⁇ 1> to ⁇ 8>, wherein the aliphatic monoalcohol is methanol, ethanol or butanol.
- ⁇ 10> The method for producing bisphenol according to any one of ⁇ 1> to ⁇ 9>, comprising the following Step A, Step B1 and Step C1.
- Step A Step of decomposing the polycarbonate resin in the reaction solution containing the polycarbonate resin, the dialkyl carbonate, the aliphatic monoalcohol and the catalyst to obtain a non-slurry polycarbonate decomposition solution containing bisphenol
- Step B1 A step of concentrating the polycarbonate decomposition solution obtained in step A to obtain a concentrated solution.
- Step C1 An aromatic hydrocarbon is supplied to the concentrated solution obtained in step B1 to precipitate bisphenol.
- Step A Step of decomposing the polycarbonate resin in the reaction solution containing the polycarbonate resin, the dialkyl carbonate, the aliphatic monoalcohol and the catalyst to obtain a non-slurry polycarbonate decomposition solution containing bisphenol
- Step B2 A step of removing the dialkyl carbonate and the aliphatic monoalcohol from the solution containing the polycarbonate decomposition solution and the aromatic monoalcohol obtained in step A to obtain a solution containing bisphenol and the aromatic monoalcohol
- Step C2 the above step Step of recovering bisphenol from the solution containing bisphenol and aromatic monoalcohol obtained in B2 ⁇ 12>
- the polycarbonate resin is recovered in the reaction solution containing the polycarbonate resin, the dialkyl carbonate, the aliphatic monoalcohol and the catalyst.
- the amount of water mixed with the first decomposition solution is 0.5 mol or more and 1.5 mol or less per 1 mol of repeating units derived from bisphenol in the polycarbonate resin used in the decomposition reaction.
- ⁇ 14> The aliphatic monoalcohol regenerated in the second decomposition step is separated from the bisphenol as a mixture with the dialkyl carbonate, and the mixture of the aliphatic monoalcohol and the dialkyl carbonate is regenerated in the first decomposition step.
- ⁇ 15> The method for producing bisphenol according to any one of ⁇ 12> to ⁇ 14>, wherein the reaction liquid is slurry and the first decomposition liquid is not slurry.
- ⁇ 16> The method for producing bisphenol according to any one of ⁇ 1> to ⁇ 10> above, wherein a bisphenol-alkyl carbonate condensate represented by the following formula (III), which is a by-product of decomposition of the polycarbonate resin, is further recovered.
- formula (III) R is a methyl group, an ethyl group or a butyl group.
- ⁇ 17> The method for producing a bisphenol according to ⁇ 16>, wherein in formula (III), R is a methyl group.
- a bisphenol raw material containing the bisphenol is used to produce a recycled polycarbonate resin. Production method.
- Epoxy resin production wherein bisphenol is obtained through the method for producing bisphenol according to any one of ⁇ 1> to ⁇ 17>, and then an epoxy resin is produced using a polyhydric hydroxy compound raw material containing the bisphenol. Production method. ⁇ 20> After the epoxy resin is obtained through the method for producing an epoxy resin according to ⁇ 19>, an epoxy resin raw material containing the epoxy resin and a polyhydroxy compound raw material are further reacted to produce an epoxy resin. A method for producing an epoxy resin.
- An epoxy resin is obtained through the method for producing an epoxy resin according to ⁇ 19> or ⁇ 20> above, an epoxy resin composition containing the epoxy resin and a curing agent is obtained, and then the epoxy resin composition is A method for producing a cured epoxy resin product by curing to obtain a cured epoxy resin product.
- R is a methyl group, an ethyl group or a butyl group.
- bisphenol is produced by using a decomposition method that can decompose polycarbonate resin with high reactivity using a general-purpose catalyst even under mild conditions with a small environmental load.
- a manufacturing method is provided.
- the method for producing bisphenol of the present invention bisphenol with good color tone can be obtained.
- a method for producing a recycled polycarbonate resin and a method for producing an epoxy resin using the obtained bisphenol are provided.
- a method for producing a bisphenol-alkyl carbonate condensate wherein the bisphenol-alkyl carbonate condensate is produced by utilizing the decomposition method of decomposing the polycarbonate resin.
- the present invention is a method for producing bisphenol, wherein the decomposition reaction of the polycarbonate resin is performed in a reaction solution containing a polycarbonate resin, a dialkyl carbonate, an aliphatic monoalcohol, and a catalyst, and the catalyst is an alkali metal hydroxide or an alkali metal.
- a method for producing a bisphenol selected from the group consisting of carbonates, alkali metal alkoxides, alkali metal oxides, chain alkylamines and pyridines hereinafter referred to as the "method for producing a bisphenol of the present invention" There is.)
- the method for producing bisphenol of the present invention decomposes a polycarbonate resin in the presence of a dialkyl carbonate, an aliphatic monoalcohol and a specific catalyst.
- a dialkyl carbonate and an aliphatic alcohol together, the dialkyl carbonate swells the polycarbonate resin and increases the contact area with the aliphatic monoalcohol, which accelerates the dissolution rate and decomposition rate. Even if there is, it is thought that it will be easily decomposed.
- the molar ratio of the dialkyl carbonate used in the decomposition reaction (that is, the charged molar ratio) to 1 mol of repeating units derived from bisphenol in the polycarbonate resin used in the decomposition reaction is 1.5. 8 or more.
- the dissolution rate and decomposition rate of the polycarbonate resin do not decrease as will be described later, and the reaction can be carried out efficiently.
- the dispersibility of the polycarbonate resin in the dialkyl carbonate is very good, and by using the dialkyl carbonate, the polycarbonate resin swells and can be easily crushed into fine particles and dispersed.
- the dispersed polycarbonate resin gradually dissolves in the dialkyl carbonate and is decomposed.
- a dialkyl carbonate is more likely to undergo a decomposition reaction at the solid-liquid interface than a solvent that leaves the polycarbonate resin in the form of lumps. Therefore, in the method for producing bisphenol of the present invention, it is preferable to prepare a slurry-like reaction liquid in which the polycarbonate resin is dispersed, and to decompose the polycarbonate resin in the slurry-like reaction liquid.
- the range of slurry at the start of polycarbonate decomposition is defined by filtering the reaction liquid using a filter with an opening of 1 mm or less, and the solid concentration of the filtered polycarbonate resin is 5 mass with respect to the reaction liquid. % or more.
- the decomposition solution is filtered using a filter with an opening of 1 mm or less, and the solid concentration of the filtered polycarbonate resin is less than 5% by mass relative to the decomposition solution. is preferably
- the polycarbonate resin used in the method for producing bisphenol of the present invention has a repeating unit derived from bisphenol represented by the general formula (1) (hereinafter sometimes simply referred to as "repeating unit").
- R 1 to R 4 each independently include a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an aryl group, and the like.
- R5 and R6 each independently include a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, and the like.
- hydrogen atom methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, t-butyl group, n-pentyl group, i-pentyl group, n-hexyl group , n-heptyl group, n-octyl group, 2-ethylhexyl group, n-nonyl group, n-decyl group, n-undecyl group, n-dodecyl group, methoxy group, ethoxy group, n-propoxy group, i -propoxy group, n-butoxy group, i-butoxy group, t-butoxy group, n-pentyloxy group, i-pentyl group
- R 5 and R 6 are bonded or bridged to each other between the two groups, cycloalkylidene group, fluorenylidene group (fluorene 9,9-diyl group), xanthenylidene group (xanthene 9,9-diyl group), thioxantheni
- fluorenylidene group fluorene 9,9-diyl group
- xanthenylidene group xanthene 9,9-diyl group
- thioxantheni A lidene group (thioxanthene 9,9-diyl group) or the like may be formed.
- cycloalkylidene groups include cyclopropylidene, cyclobutylidene, cyclopentylidene, cyclohexylidene, 3,3,5-trimethylcyclohexylidene, cycloheptylidene, cyclooctylidene, cyclononylidene, cyclodecylidene, cycloundecylidene, cyclododecylidene and the like.
- a polycarbonate resin bisphenol A type polycarbonate resin in which R 1 to R 4 in the general formula (1) are hydrogen atoms and R 5 and R 6 are methyl groups, It is preferable to use it as a raw material.
- the method for producing bisphenol of the present invention is suitable as a method for producing 2,2-bis(4-hydroxyphenyl)propane (hereinafter sometimes referred to as "bisphenol A").
- n is not particularly limited, but is 2 to 1000, for example.
- compositions containing resins other than polycarbonate resins such as copolymers and polymer alloys
- examples of compositions containing resins other than polycarbonate resins include polycarbonate/polyester copolymers, polycarbonate/polyester alloys, polycarbonate/polyarylate copolymers, and polycarbonate/polyarylate alloys.
- a composition containing a resin other than a polycarbonate resin is used, a composition containing a polycarbonate resin as a main component (containing 50% by mass or more of the polycarbonate resin in the composition) can be suitably used.
- the polycarbonate resin can be used by mixing two or more different polycarbonate resins.
- a polycarbonate resin alone may be simply called polycarbonate.
- the polycarbonate resin contained in waste plastic is preferable.
- Polycarbonate resins are molded and used for various molded articles such as optical members such as headlamps and optical recording media such as optical discs.
- optical members such as headlamps
- optical recording media such as optical discs.
- waste plastics containing polycarbonate resins leftover materials, defective products, used molded products, and the like in molding polycarbonate resins into these molded products can be used.
- Waste plastics can be used after washing, crushing, crushing, etc. as appropriate.
- Methods for crushing waste plastics include coarse crushing to 20 cm or less using a jaw crusher or orbital crusher, medium crushing to 1 cm or less using an orbital crusher, cone crusher, or mill, or using a mill. It is a pulverization or the like that crushes to 1 mm or less, and it is sufficient if it can be reduced to a size that can be supplied to the decomposition tank. If the waste plastic is thin plastic such as CD or DVD, it can be shredded using a shredder or the like and supplied to the decomposition tank.
- other resins such as copolymers and polymer alloys, and portions formed of components other than the polycarbonate resin, such as the layers on the front and back surfaces of optical discs, may be removed in advance before use.
- dialkyl carbonate One of the characteristics of the method for producing bisphenol of the present invention is to use a dialkyl carbonate.
- Dialkyl carbonate is preferably dimethyl carbonate, diethyl carbonate or dibutyl carbonate.
- dimethyl carbonate and diethyl carbonate are preferable because they have relatively low boiling points and can be easily removed after the decomposition reaction and can reduce the purification load.
- the dialkyl carbonate includes dialkyl carbonate not derived from polycarbonate resin. That is, when a polycarbonate resin is decomposed in the presence of an aliphatic monoalcohol, a dialkyl carbonate is produced as the polycarbonate resin is decomposed.
- the dialkyl carbonate is used by supplying it to a reactor for decomposing the polycarbonate resin.
- dialkyl carbonate not derived from the polycarbonate resin means dialkyl carbonate not derived from the polycarbonate resin used at the same time, and is the dialkyl carbonate supplied to the reaction vessel.
- the dialkyl carbonate generated by decomposition of the polycarbonate resin may be recycled to the next decomposition reaction as dialkyl carbonate not derived from the polycarbonate resin used simultaneously.
- the amount of dialkyl carbonate to be used is small relative to the amount of polycarbonate resin to be used, the amount of solid (polycarbonate resin) to the liquid at the initial stage of the reaction will be large, resulting in poor mixing, dissolution rate and decomposition rate of polycarbonate resin. tends to be delayed. Therefore, the molar ratio of the dialkyl carbonate used to 1 mol of the repeating unit of the polycarbonate resin used is 1.8 or more. It is more preferably 1.9 or more, and more preferably 2.0 or more. In addition, when the amount of dialkyl carbonate used relative to the polycarbonate resin used is large, the production efficiency tends to deteriorate. Therefore, the molar ratio of the dialkyl carbonate to be used is preferably 100 or less, more preferably 70 or less, and even more preferably 50 or less to 1 mol of the repeating unit of the polycarbonate resin to be used.
- the molar ratio of the dialkyl carbonate used in the decomposition reaction to 1 mol of the repeating unit of the polycarbonate resin used in the decomposition reaction is preferably 1.8 or more and 100 or less, more preferably 1.9 or more and 70 or less, and 2.0. 50 or less is more preferable. Also, the molar ratio may be 2.5 or more and 45 or less, or 3.0 or more and 40 or less.
- the amount (mole or mass) of the polycarbonate resin used for the decomposition reaction means the amount of the polycarbonate resin charged (the amount supplied to the reaction vessel).
- the "polycarbonate resin used in the decomposition reaction” may be simply described as “the polycarbonate resin used”. The same is true for other materials such as dialkyl carbonates, fatty alcohols and catalysts.
- the number of moles of the repeating unit of the polycarbonate resin used is the value obtained by dividing the mass of the polycarbonate resin used (mass of preparation) by the molecular weight of the repeating unit derived from bisphenol.
- the number of moles of the dialkyl carbonate to be used is the value obtained by dividing the mass of the dialkyl carbonate to be used (mass of charge) by the molecular weight of the dialkyl carbonate.
- the molar ratio of the dialkyl carbonate to be used with respect to 1 mol of the repeating unit of the polycarbonate resin to be used is "(mass of dialkyl carbonate to be used [g]/molecular weight of dialkyl carbonate [g/mol])/(molecular weight of polycarbonate resin to be used mass [g]/molecular weight of repeating unit of polycarbonate resin [g/mol])”.
- dialkyl carbonate is generated as the polycarbonate resin decomposes
- the dialkyl carbonate contained in the reaction solution at the end of the reaction is the dialkyl carbonate not derived from the polycarbonate resin (the dialkyl carbonate supplied to the reaction tank) and the polycarbonate resin.
- dialkyl carbonate (dialkyl carbonate produced by alcoholysis of polycarbonate resin).
- Part of the dialkyl carbonate contained in the reaction solution at the end of the reaction is dialkyl carbonate not derived from the polycarbonate resin.
- the molar ratio of the dialkyl carbonate (total of the dialkyl carbonate used and the dialkyl carbonate produced) at the end of the reaction to 1 mol of the repeating unit of the polycarbonate resin used is the ratio of the dialkyl carbonate used to 1 mol of the repeating unit of the polycarbonate resin used. larger than the molar ratio.
- the molar ratio of the dialkyl carbonate at the end of the reaction (total of the dialkyl carbonate used and the dialkyl carbonate produced) to 1 mol of the repeating unit of the polycarbonate resin used is preferably 2.8 or more, more preferably 2.81 or more. 3.3 or more is more preferable, and 3.8 or more is still more preferable.
- Aliphatic monoalcohol One of the characteristics of the method for producing bisphenol of the present invention is that an aliphatic monoalcohol is used.
- Aliphatic monoalcohols include methanol, ethanol, n-propanol, i-propanol, n-butanol, i-butanol, t-butanol, n-pentanol, i-pentanol, n-hexanol, n-heptanol, n- -octanol, n-nonanol, n-decanol, n-undecanol, n-dodecanol and the like.
- the aliphatic monoalcohol is preferably an alcohol having 1 to 5 carbon atoms, more preferably any one selected from the group consisting of methanol, ethanol and butanol.
- an aliphatic monoalcohol that has the same alkyl group as the dialkyl carbonate used.
- methanol when dimethyl carbonate is used as the dialkyl carbonate
- ethanol is preferably used when diethyl carbonate is used as the dialkyl carbonate
- butanol is used when dibutyl carbonate is used as the dialkyl carbonate. is preferred.
- the amount of aliphatic monoalcohol used is small relative to the amount of polycarbonate resin used, the polycarbonate resin will be difficult to decompose and the decomposition rate will decrease, resulting in a longer decomposition time and a tendency to deteriorate efficiency. It is in.
- the molar ratio of the aliphatic monoalcohol to 1 mol of the repeating unit of the polycarbonate resin ((mass of the aliphatic monoalcohol used [g] / molecular weight of the aliphatic monoalcohol [g / mol]) / (of the polycarbonate resin to be used Mass [g]/molecular weight of repeating unit of polycarbonate resin [g/mol])) is preferably 0.1 or more, more preferably 0.5 or more, and still more preferably 1.0 or more.
- the molar ratio of the aliphatic monoalcohol to 1 mol of the repeating unit of the polycarbonate resin is preferably 20.0 or less, more preferably 15.0 or less, and even more preferably 10.0 or less.
- the decomposition of polycarbonate resin can be controlled by adjusting the amount of aliphatic monoalcohol and the reaction time.
- the molar ratio of the aliphatic monoalcohol to 1 mol of the repeating unit of the polycarbonate resin is 2.0 or more is preferable, 2.1 or more is more preferable, and 2.2 or more is still more preferable.
- the molar ratio of the aliphatic monoalcohol to 1 mol of the repeating unit of the polycarbonate resin is 2. It is preferably less than 0.0, and may be 1.95 or less, 1.9 or less, 1.85 or less, or 1.8 or less.
- the molar ratio of the aliphatic monoalcohol to 1 mol of the repeating unit of the polycarbonate resin is 2.0 or more and 20.0 or less, 2.1 or more and 15.0 or less, or 2.1 or more and 15.0 or less. It is preferable to make it 2 or more and 10.0 or less.
- the molar ratio of the aliphatic monoalcohol to 1 mol of the repeating unit of the polycarbonate resin is 0.1 or more and less than 2.0, 0.5 or more and 1.95. or less, or 1.0 or more and 1.9 or less.
- the molar ratio of the aliphatic monoalcohol used to the dialkyl carbonate used is preferably 0.01 or more, more preferably 0.05 or more. preferable. Also, the molar ratio is preferably 15.0 or less, more preferably 10.0 or less, more preferably 8.0 or less, and more preferably 5.0 or less. If the molar ratio of the aliphatic monoalcohol used to the dialkyl carbonate used is small, the polycarbonate resin will be difficult to decompose, or the decomposition rate will decrease, resulting in a prolonged decomposition time. Further, when the molar ratio is large, separation of the aliphatic monoalcohol and the dialkyl carbonate becomes complicated when recovering the dialkyl carbonate.
- the molar ratio of the aliphatic monoalcohol used to the dialkyl carbonate used is 0.01 or more and 10.0 or less, 0.05 or more and 8.0 or less, 0.1 or more and 6.0 or less. , 0.15 to 5.0 or 0.2 to 3.0. Also, the molar ratio may be 0.25 or more and 2.5 or less, or 0.3 or more and 1.8 or less.
- the method for producing bisphenol of the present invention further uses a catalyst selected from the group consisting of alkali metal hydroxides, alkali metal carbonates, alkali metal alkoxides, alkali metal oxides, chain alkylamines and pyridine. That is one of the characteristics.
- the catalyst is preferably one selected from the group consisting of alkali metal hydroxides, alkali metal carbonates, alkali metal alkoxides and alkali metal oxides, more preferably alkali metal hydroxides or alkali metal carbonates.
- alkali metal hydroxides alkali metal carbonates
- alkali metal alkoxides alkali metal oxides
- alkali metal hydroxides or alkali metal carbonates The use of inorganic metal catalysts such as alkali metal hydroxides and alkali metal carbonates was considered unfavorable because the dialkyl carbonate would decompose.
- the present inventors found that when a polycarbonate resin is decomposed in the presence of a dialkyl carbonate and an aliphatic monoalcohol using an alkali metal hydroxide, an alkali metal carbonate, or the like as a catalyst, the polycarbonate resin decomposes at a high reaction rate, It was found that bisphenol with good color tone can be obtained. Further, by using any one selected from the group consisting of alkali metal hydroxides, alkali metal carbonates, alkali metal alkoxides and alkali metal oxides, odor is less likely to occur, so it is preferable to use these catalysts. .
- an alkali metal hydroxide is a salt of an alkali metal ion (M + ) and a hydroxide ion (OH ⁇ ), and is a compound represented by MOH (M represents an alkali metal atom).
- M represents an alkali metal atom
- Sodium hydroxide or potassium hydroxide is preferred as the alkali metal hydroxide.
- the molar ratio of the alkali metal hydroxide used to 1 mol of the repeating unit of the polycarbonate resin used ((mass of alkali metal hydroxide used [g]/molecular weight of alkali metal hydroxide [g/mol]) /(mass [g] of polycarbonate resin used/molecular weight [g/mol] of repeating unit of polycarbonate resin)) is preferably 0.0001 or more, more preferably 0.0005 or more, and still more preferably 0.0007 or more. .
- the molar ratio of the alkali metal hydroxide to be used to 1 mol of the repeating unit of the polycarbonate resin to be used is preferably 1 or less, more preferably 0.9 or less, and even more preferably 0.8 or less.
- an alkali metal carbonate is a salt of an alkali metal ion (M + ) and a carbonate ion (CO 3 2 ⁇ ), and M 2 CO 3 or MHCO 3 (M represents an alkali metal atom).
- M represents an alkali metal atom
- the alkali metal carbonate is preferably sodium carbonate, potassium carbonate, sodium hydrogencarbonate or potassium hydrogencarbonate, and more preferably sodium carbonate or potassium carbonate.
- the molar ratio of the alkali metal carbonate used to 1 mol of the repeating unit of the polycarbonate resin used ((mass of the alkali metal carbonate used [g] / molecular weight of the alkali metal carbonate [g / mol]) / (used The mass [g] of the polycarbonate resin/molecular weight [g/mol] of the repeating unit of the polycarbonate resin)) is preferably 0.0001 or more, more preferably 0.0005 or more, and still more preferably 0.001 or more.
- the molar ratio of the alkali metal carbonate used to 1 mol of the repeating unit of the polycarbonate resin used is preferably 1 or less, more preferably 0.9 or less, and even more preferably 0.8 or less.
- an alkali metal alkoxide is a salt of an alkali metal ion (M + ) and an aliphatic or aromatic alkoxide, and is a compound represented by the following formula (2).
- MOR H Formula (2) M represents an alkali metal atom, preferably sodium or potassium.
- R H represents an alkyl group or an aryl group, preferably an alkyl group having 1 to 5 carbon atoms or a phenyl group.
- Preferred alkali metal alkoxides are sodium phenoxide, sodium methoxide, sodium ethoxide, potassium phenoxide, potassium methoxide, potassium ethoxide and potassium t-butoxide.
- the molar ratio of the alkali metal alkoxide used to 1 mol of the repeating unit of the polycarbonate resin used ((mass of alkali metal alkoxide used [g] / molecular weight of alkali metal alkoxide [g / mol]) / (polycarbonate resin used mass [g]/molecular weight of repeating unit of polycarbonate resin [g/mol])) is preferably 0.0001 or more, more preferably 0.0005 or more, and still more preferably 0.001 or more.
- the molar ratio of the alkali metal alkoxide used to 1 mol of the repeating unit of the polycarbonate resin used is preferably 1 or less, more preferably 0.9 or less, and even more preferably 0.8 or less.
- Alkali metal oxides include sodium oxide, potassium oxide, and the like.
- the molar ratio of the alkali metal oxide to be used to 1 mol of the repeating unit of the polycarbonate resin to be used ((mass of the alkali metal oxide to be used [g] / molecular weight of the alkali metal oxide [g / mol]) / (used The mass [g] of the polycarbonate resin/molecular weight [g/mol] of the repeating unit of the polycarbonate resin)) is preferably 0.0001 or more, more preferably 0.0005 or more, and still more preferably 0.001 or more.
- the molar ratio of the alkali metal oxide to be used to 1 mol of the repeating unit of the polycarbonate resin to be used is preferably 1 or less, more preferably 0.9 or less, and even more preferably 0.8 or less.
- a chain alkylamine is a compound having an amine structure in which at least one hydrogen atom of ammonia is substituted with an alkyl group.
- the chain alkylamine preferably has a boiling point of 200° C. or lower, more preferably 160° C. or lower. If it has such a boiling point, it can be removed together with the dialkyl carbonate by reducing pressure and/or heating. On the other hand, if the boiling point is too low, the chain alkylamine may volatilize during the decomposition reaction and the decomposition rate may decrease.
- the chain alkylamine is preferably a chain alkyl monoamine or a chain alkyl diamine.
- the monoalkyl monoamine which is a primary amine, reacts with the carbonate-bonded portion of the polycarbonate resin to generate isocyanate, and is more preferably a dialkyl monoamine, which is a secondary amine, or a trialkyl monoamine, which is a tertiary amine.
- a dialkylmonoamine which is a secondary amine, reacts with the carbonate-bonded portion of the polycarbonate resin to form a tetraalkylurea, and is more preferably a trialkylmonoamine, which is a tertiary amine.
- the chain alkylamine is preferably an alkylmonoamine represented by general formula (I).
- R A represents an alkyl group having 1 to 3 carbon atoms
- R B to R C each independently represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms.
- R A is preferably a methyl group, ethyl group, n-propyl group, or i-propyl group
- R B to R C are each independently a hydrogen atom, a methyl group, an ethyl group, an n-propyl group, or i -Propyl groups are preferred.
- chain alkylamines represented by general formula (I) include methylamine, ethylamine, propylamine, dimethylamine, diethylamine, trimethylamine, triethylamine, and the like.
- the chain alkylamine is preferably an alkyldiamine represented by general formula (II).
- R D to R G each independently represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and m represents an integer of 1 to 6.
- R D to R G are each independently preferably a methyl group, an ethyl group, an n-propyl group, or an i-propyl group.
- chain alkylamines represented by formula (II) include ethylenediamine, trimethylenediamine, tetramethylenediamine, pentamethylenediamine, hexamethylenediamine, N-methylethylenediamine, N,N'-dimethylethylenediamine, N , N-dimethyltrimethylenediamine, N,N,N',N'-tetramethylethylenediamine, N,N'-diethylethylenediamine, N,N,N',N'-tetraethylethylenediamine, 1,3-diaminopropane, N-methyl-1,3-diaminopropane, N,N'-dimethyl-1,3-diaminopropane, N,N,N',N'-tetramethyl-1,3-diaminopropane and the like.
- the molar ratio of N of the amino group of the chain alkylamine to be used with respect to 1 mol of the repeating unit of the polycarbonate resin to be used ((mass of alkylamine to be used [g] ⁇ number of N of amino group / number of chain alkylamine Molecular weight [g/mol])/(mass of polycarbonate resin to be used [g]/molecular weight of repeating unit of polycarbonate resin [g/mol])) is preferably 0.0005 or more, more preferably 0.0007 or more, 0.001 or more is more preferable.
- the molar ratio of N of the amino group of the chain alkylamine used to 1 mol of the repeating unit of the polycarbonate resin used is preferably 4.5 or less, 4.0 or less, 3.0 or less, 2.0 or less, 1.0 or less, 0.9 or less, and 0.8 or less, in this order, the more preferable.
- pyridine may be unsubstituted or may have a substituent such as a methyl group or a hydroxyl group. Preferred is unsubstituted pyridine.
- the molar ratio of pyridine to be used per 1 mol of repeating units of the polycarbonate resin to be used ((mass of pyridine to be used [g]/molecular weight of pyridine [g/mol])/(mass of polycarbonate resin to be used [g]/ The molecular weight [g/mol])) of the repeating unit of the polycarbonate resin is preferably 0.0005 or more, more preferably 0.0007 or more, and still more preferably 0.001 or more. For example, it can be 0.01 or more, or 0.1 or more.
- the molar ratio of pyridine to be used with respect to 1 mol of repeating units of the polycarbonate resin to be used is preferably 4.5 or less, 4.0 or less, 3.0 or less, 2.0 or less, 1.0 or less, 0.9 In the following, the smaller the value in the order of 0.8 or less, the more preferable.
- a polycarbonate resin, a dialkyl carbonate (a dialkyl carbonate not derived from a polycarbonate resin), an aliphatic monoalcohol and a catalyst are mixed to prepare a reaction solution. That is, in the method for producing bisphenol of the present invention, a dialkyl carbonate not derived from a polycarbonate resin is supplied to a reaction tank in which the polycarbonate resin is decomposed to prepare a reaction solution.
- the mixing order of polycarbonate resin, dialkyl carbonate (dialkyl carbonate not derived from polycarbonate resin), aliphatic monoalcohol and catalyst is not particularly limited.
- a polycarbonate resin, an aliphatic monoalcohol and a catalyst may be sequentially supplied to the dialkyl carbonate.
- the polycarbonate resin is preferably fed to the reaction vessel after the dialkyl carbonate and/or the aliphatic monoalcohol so that it can be mixed more uniformly.
- reaction solution contains a polycarbonate resin, a dialkyl carbonate, an aliphatic monoalcohol and a catalyst. At least the reaction immediately after the start of the reaction is preferably carried out with a slurry solution in which the polycarbonate resin is dispersed in the liquid component containing the dialkyl carbonate and the aliphatic monoalcohol.
- the theoretical slurry concentration in the reaction solution to be prepared is preferably 0.05 or more, more preferably 0.1 or more. preferable. Moreover, 0.5 or less is preferable and 0.4 or less is more preferable. If the theoretical slurry concentration (concentration of solids) is too low, the decomposition efficiency will decrease, and if the theoretical slurry concentration is too high, poor mixing will occur.
- the liquid components in the reaction solution to be prepared are mainly composed of dialkyl carbonate and aliphatic monoalcohol, and the total mass of dialkyl carbonate and aliphatic monoalcohol with respect to the mass of all liquid components is 0.8 or more. 0.9 or more, 0.95 or more, and the like.
- the total mass of the polycarbonate resin, dialkyl carbonate, aliphatic monoalcohol and catalyst with respect to the mass of the prepared reaction solution is 0.9 or more, 0.95 or more, 0.98 or more, 0.99 or more. be able to.
- the reaction liquid may be composed of a polycarbonate resin, a dialkyl carbonate, an aliphatic monoalcohol and a catalyst.
- the content of water in the prepared reaction solution (mass of water/mass of reaction solution) is usually 0.005 or less.
- the content of water in the reaction solution is preferably 0.001 or less, more preferably 0.0005 or less.
- the reaction solution is preferably prepared at 10°C or higher, more preferably at 20°C or higher. Also, the reaction solution is preferably prepared at 40° C. or lower, more preferably at 35° C. or lower. If the temperature during preparation of the reaction solution is too low, the rate of dissolution of the polycarbonate resin will decrease. In addition, the viscosity of the reaction liquid increases, and poor mixing tends to occur, and uniform mixing may become difficult. Also, if the temperature during preparation of the reaction solution is too high, depending on the type of catalyst, it may easily volatilize, making it difficult to prepare the reaction solution at a predetermined concentration or to control the decomposition reaction.
- composition reaction In the method for producing bisphenol of the present invention, the presence of the dialkyl carbonate, the aliphatic monoalcohol and the catalyst causes cleavage of the carbonate bond portion of the polycarbonate resin, resulting in decomposition. That is, the polycarbonate resin reacts with the aliphatic monoalcohol and is decomposed by alcoholysis. As a result, decomposition products such as bisphenol, dialkyl carbonate, and condensates of bisphenol and dialkyl carbonate are produced. By controlling the amount of dialkyl carbonate and aliphatic monoalcohol and the reaction time, it is possible to control the decomposition reaction such as preferentially producing bisphenol and dialkyl carbonate.
- the molar ratio of the aliphatic monoalcohol used to 1 mol of the repeating unit of the polycarbonate resin used is less than 2.0, or the reaction time is shortened to produce a condensate of bisphenol and dialkyl carbonate. good too.
- the concentration of the polycarbonate resin and the reaction solution may be clearly separated by controlling the temperature or the like during preparation, but the reaction solution adjustment step and the decomposition reaction step do not necessarily need to be clearly separated.
- a decomposition reaction of the polycarbonate resin proceeds during the preparation of the reaction liquid, and a part of the polycarbonate resin may be decomposed. By partially decomposing the polycarbonate resin during the preparation of the reaction solution, the decomposition reaction can proceed more efficiently.
- the decomposition reaction may be carried out under normal pressure or under pressure, but since the reaction proceeds sufficiently even under normal pressure, it is preferable to carry it out under normal pressure.
- reaction temperature From the preparation of the reaction solution to the termination of the decomposition reaction, the temperature may be the same as the temperature during the preparation of the reaction solution. ), it is preferable to raise the temperature to a predetermined reaction temperature. If the temperature during preparation of the reaction solution is too high, it may become difficult to control the decomposition reaction. It is preferable to raise the temperature of the reaction solution after preparation because the decomposition reaction can proceed stably.
- the reaction temperature is appropriately selected according to the type of dialkyl carbonate, the reaction time, etc. However, if the temperature is too high, the aliphatic monoalcohol in the reaction solution will evaporate and the alcoholysis will stop. In addition, when the temperature is low, the solvolysis is difficult to proceed and the reaction rate is lowered, so the time required for decomposition is prolonged.
- the reaction temperature is preferably 20° C. or higher, and more preferably 30° C. or higher and 40° C. or higher in that order. In addition, 120° C. or less is preferable, and the smaller numerical value is more preferable in the order of 110° C. or less, 100° C. or less, and 95° C. or less.
- the decomposition of the polycarbonate resin is preferably carried out at a reaction temperature of 20 to 120° C. and normal pressure, more preferably at a reaction temperature of 30 to 110° C. and normal pressure, and at a reaction temperature of 40 to 100° C. and normal pressure. is more preferred.
- the reaction temperature is adjusted from the time when the mixing of the polycarbonate resin, dialkyl carbonate, aliphatic monoalcohol and catalyst is completed, for neutralization or for stopping the decomposition reaction. It is the average temperature up to the point at which the distillation operation is started. In addition, when the temperature is raised after the reaction solution is prepared and the reaction is performed, it is the average temperature from the time when the predetermined temperature is reached to the time when the neutralization or distillation operation for stopping the decomposition reaction is started. .
- the reaction temperature in each step is preferably the above reaction temperature. Further, the reaction temperature may be the same or different in the first decomposition step and the second decomposition step.
- reaction time The reaction time is appropriately selected according to the theoretical slurry concentration, reaction temperature, etc., but if it is long, the bisphenol produced tends to decompose, so it is preferably 30 hours or less, 25 hours or less, and 20 hours. The shorter the time, in the order of 15 hours or less, 10 hours or less, and 5 hours or less, the more preferable. If the reaction time is short, the decomposition reaction may not proceed sufficiently. Therefore, the reaction time is preferably 0.1 hour or longer, more preferably 0.5 hour or longer, and still more preferably 1 hour or longer.
- the reaction time is the time from the completion of mixing the polycarbonate resin, dialkyl carbonate, aliphatic monoalcohol, and catalyst to the start of the neutralization and distillation operations for stopping the decomposition reaction.
- the end point of the reaction time may be determined by tracking the decomposition reaction by liquid chromatography or the like.
- the reaction time is the total time of the first decomposition step and the second decomposition step.
- a decomposition method (1) for a polycarbonate resin a polycarbonate resin is decomposed in a reaction solution containing a polycarbonate resin, a dialkyl carbonate, an aliphatic monoalcohol and a catalyst to obtain a first decomposition solution containing bisphenol.
- a decomposition step and a second decomposition step of hydrolyzing the dialkyl carbonate by mixing the first decomposition solution and water to regenerate the aliphatic monoalcohol and decomposing the polycarbonate resin to produce bisphenol. and wherein the first decomposition step and the second decomposition step are continuously performed.
- the first decomposition step is a step of decomposing a polycarbonate resin in a reaction solution containing a polycarbonate resin, a dialkyl carbonate, an aliphatic monoalcohol and a catalyst to obtain a first decomposition solution containing bisphenol.
- the polycarbonate resin reacts with the aliphatic monoalcohol and is decomposed by alcoholysis, the aliphatic monoalcohol is consumed, and decomposition products such as bisphenol, dialkyl carbonate, and condensates of bisphenol and dialkyl carbonate are produced. do.
- the prepared reaction solution is preferably slurry.
- the theoretical slurry concentration in the reaction solution to be prepared is preferably 0.05 or more, more preferably 0.1 or more. preferable. Moreover, 0.5 or less is preferable and 0.4 or less is more preferable. If the theoretical slurry concentration (concentration of solid content) is too low, the decomposition efficiency will decrease, and if the theoretical slurry concentration is too high, poor mixing will occur. It is preferable that the slurry in which the polycarbonate resin is dispersed disappears at the end of the first decomposition step. More preferably, the polycarbonate resin is completely dissolved at the end of the first decomposition step, and the first decomposition liquid is not a slurry.
- the preparation method and reaction temperature of the reaction solution are as described above. More preferably, 2.2 or more is even more preferable
- the first decomposition step 0.1 mol of water is added to 1 mol of repeating units of the polycarbonate resin to be used (that is, the amount of polycarbonate resin charged) so that the decomposition product is not hydrolyzed in the first decomposition step. It is preferable that the decomposition reaction is carried out under conditions such as 0.05 mol or less, 0.01 mol or less, or the like.
- the water content of the reaction solution to be prepared may be controlled, and the water content of the reaction solution to be prepared is 0.5% by mass or less, 0.1% by mass or less, 0.05% by mass or less, etc.
- the first decomposition step can be performed as
- the reaction time in the first decomposition step is not particularly limited, but when the reaction liquid is slurry at the start of the reaction, it should be at least the time required for the slurry in which the polycarbonate resin is dispersed to disappear and become a non-slurry liquid. preferably. Further, it is more preferable to set the reaction solution to a time longer than at least until the polycarbonate resin is completely dissolved. If the second decomposition step is carried out in the state of a slurry-like reaction liquid, the dissolution rate of the undissolved polycarbonate resin tends to decrease, and decomposition tends to take a long time.
- the first decomposition step can be 0.1 hours or longer, 0.25 hours or longer, 0.5 hours or longer, 1 hour or longer, and the like.
- the first decomposition solution is mixed with water to hydrolyze the dialkyl carbonate to regenerate the aliphatic monoalcohol, and the polycarbonate resin is decomposed to generate bisphenol. be.
- the alcoholysis of the polycarbonate resin proceeds along with the hydrolysis of the dialkyl carbonate.
- the aliphatic monoalcohol produced by hydrolysis of the dialkyl carbonate can react with the polycarbonate resin, thereby improving the reaction rate of decomposition of the polycarbonate resin.
- the reaction liquid (decomposition liquid) is a non-slurry liquid in which bisphenol is dissolved. Even if the polycarbonate resin remains at the end of the second decomposition step, the slurry in which the polycarbonate resin is dispersed disappears, leaving a non-slurry liquid. At the end of the second decomposition step, it is preferable that the polycarbonate resin is completely dissolved and the decomposition liquid is not a slurry.
- the environmental load becomes lower.
- the decomposition liquid obtained in the second decomposition step contains bisphenol, aliphatic monoalcohol and dialkyl carbonate.
- Aliphatic monoalcohol and dialkyl carbonate can be recovered by distilling the decomposed liquid or a liquid obtained by neutralizing the same.
- dimethyl carbonate and methanol azeotrope when dimethyl carbonate and methanol are used, a mixture of dimethyl carbonate and methanol can be recovered by distillation. The recovered distillate can be reused for preparing the reaction solution in the first decomposition step.
- the second decomposition step if the amount of water mixed with the first decomposition solution is too small, the amount of regenerated aliphatic monoalcohol is small, and the effect of accelerating the decomposition of the undecomposed polycarbonate resin is low. On the other hand, if the amount is too large, the amount of the regenerated aliphatic monoalcohol increases, so that the undecomposed polycarbonate resin can be efficiently decomposed. However, when the mixture of the aliphatic monoalcohol and the dialkyl carbonate is recovered in the first decomposition step and reused, the aliphatic monoalcohol becomes excessive, making it difficult to use the entire recovered amount as it is.
- the amount of water mixed with the first decomposition solution is preferably 0.5 mol or more and 1.5 mol or less, more preferably 0.6 mol, per 1 mol of the repeating unit of the polycarbonate resin used. mol or more and 1.4 mol or less, and most preferably 0.7 mol or more and 1.3 mol or less.
- the amount of aliphatic monoalcohol and dialkyl carbonate contained in the decomposition solution after the second decomposition step is 80% by mass to 120% by mass relative to the amount used in the first decomposition step (amount charged). It is preferably in the range, more preferably in the range of 90% by mass to 110% by mass. With a composition within this range, even if the mixed liquid of the aliphatic monoalcohol and the dialkyl carbonate is used for the preparation of the reaction liquid in the first decomposition step, it is easy to adjust the reaction liquid to a desired composition. Therefore, it is easy to recycle to the first decomposition step as a mixture of aliphatic monoalcohol and dialkyl carbonate.
- Method for decomposing polycarbonate resin (2) When trying to obtain a condensate together with bisphenol, it is preferable to carry out a decomposition reaction so as not to hydrolyze the condensate. In such a case, after preparing the reaction solution, it is preferable to adopt a method in which the decomposition reaction is carried out until the reaction is completed without additionally supplying water. In order to suppress the hydrolysis of the decomposition products, the water content of the reaction solution to be prepared is 0.5% by mass or less, 0.1% by mass or less, or 0.05% by mass or less. It is preferred to carry out the reaction.
- the amount of water per 1 mol of the repeating unit of the polycarbonate resin used may be controlled, and water is 0.1 mol or less, 0.05 mol or less, or 0.01 mol or less per 1 mol of the repeating unit of the polycarbonate resin used. It can be set as a condition such as mol or less.
- a method for stopping the decomposition reaction of the polycarbonate resin is appropriately selected depending on the type of catalyst used.
- the decomposition reaction can be stopped by distilling off or neutralizing the chain alkylamine or pyridine.
- an ammonium salt or pyridinium salt is generated and its removal is also required. Therefore, the removal of the chain alkylamine or pyridine is preferably It is a method of distilling off.
- the decomposition reaction can be stopped by neutralization or the like.
- Bisphenol can be recovered from the reaction solution after the decomposition reaction by means such as crystallization or column chromatography after stopping the decomposition reaction of the polycarbonate resin.
- Bisphenol is preferably recovered by crystallization, and the method for producing bisphenol of the present invention preferably has a crystallization step of recovering bisphenol by crystallization. Specifically, after the decomposition reaction of the polycarbonate resin, the organic phase obtained by removing the catalyst and solvent from the reaction solution and adding and mixing the organic solvent is washed with water or saline, and if necessary, Neutralize and wash with ammonium chloride water. The washed organic phase is then cooled and crystallized.
- Organic solvents that can be used during neutralization or crystallization include aromatic hydrocarbons such as toluene, xylene, ethylbenzene, diethylbenzene, isopropylbenzene, and mesitylene; Aliphatic hydrocarbons, methanol, ethanol, n-propanol, i-propanol, n-butanol, i-butanol, t-butanol, n-pentanol, i-pentanol, n-hexanol, n-heptanol, n-octanol , n-nonanol, n-decanol, n-undecanol, n-dodecanol, ethylene glycol, diethylene glycol, triethylene glycol and other aliphatic alcohols can be used.
- aromatic hydrocarbons such as toluene, xylene, ethylbenzene
- the bisphenol-alkyl carbonate condensate represented by the following formula (III), which is a by-product of the decomposition of the polycarbonate resin, can be further recovered.
- R is a methyl group, an ethyl group, or a butyl group, preferably a methyl group.
- the recovery (isolation and purification) of the bisphenol-alkyl carbonate condensate can be carried out by a conventional method. Examples include crystallization and purification by column chromatography.
- the method for producing bisphenol of the present invention can be a method (1) for producing bisphenol having the following steps A, B1 and C1.
- Step A Step of decomposing the polycarbonate resin in a reaction solution containing the polycarbonate resin, the dialkyl carbonate, the aliphatic monoalcohol and the catalyst to obtain a polycarbonate decomposition solution containing bisphenol
- Step B1 Obtained in Step A Step of concentrating the obtained polycarbonate decomposition solution to obtain a concentrate
- An aromatic hydrocarbon is supplied to the concentrate obtained in Step B1 to crystallize to precipitate bisphenol, and a slurry containing bisphenol is obtained. and obtaining bisphenol by solid-liquid separation of the obtained slurry
- step A for example, any selected from the group consisting of a polycarbonate resin, a dialkyl carbonate, an aliphatic monoalcohol, an alkali metal hydroxide, an alkali metal carbonate, an alkali metal alkoxide, a chain alkylamine and pyridine is stirred for a predetermined period of time.
- the polycarbonate resin is decomposed to produce bisphenol, and a bisphenol-containing polycarbonate decomposition solution is obtained.
- the polycarbonate resin, the dialkyl carbonate, the aliphatic monoalcohol, the type and mixing ratio of the catalyst, the reaction temperature, etc. are as described above.
- step A it is preferable to decompose the polycarbonate resin in a slurry-like reaction liquid to carry out the reaction.
- the decomposition reaction may be carried out until the reaction is completed without additional supply, or water may be mixed in the middle of the reaction to allow the decomposition reaction to proceed.
- the balance may be controlled.
- Theoretical slurry concentration in the reaction solution to be prepared is preferably 0.05 or more, more preferably 0.1 or more. .
- 0.5 or less is preferable and 0.4 or less is more preferable.
- the decomposition efficiency will decrease, and if the theoretical slurry concentration is too high, poor mixing will occur.
- the polycarbonate resin dissolves, and the slurry in which the polycarbonate resin is dispersed disappears.
- a non-slurry liquid in which bisphenol is dissolved is obtained. Even if the polycarbonate resin remains at the end of step A, it is preferable that the liquid is not a slurry and that the polycarbonate resin is completely dissolved.
- step B1 concentration of the polycarbonate decomposition solution can be performed by distilling off the solvent. Distillation is preferably carried out so that the concentration of the concentrated liquid is 70% by mass or less, preferably 60% by mass or less, and more preferably 50% by mass or less of the polycarbonate decomposition liquid. . Distillation is preferably carried out so that the concentration of the concentrated liquid is 20% by mass or more, preferably 30% by mass or less, of the polycarbonate decomposition liquid. If the solution is concentrated too much, bisphenol will precipitate and the solution will solidify. For example, distillation can be carried out at a temperature of 50-200° C. and a pressure of 0.1 kPa to 150 kPa.
- the polycarbonate decomposition solution may be concentrated after neutralization and washing.
- Neutralization is performed by mixing a polycarbonate decomposing solution with an acid such as hydrochloric acid, sulfuric acid, or phosphoric acid. Neutralization is preferably carried out by adjusting the amount of acid to be mixed so that the pH becomes 5.5 to 9.0 (preferably pH 6.0 to 8.0).
- the aqueous phase is removed, or if the neutralized salt precipitates, the neutralized salt is removed to obtain a neutralized solution containing bisphenol. This neutralized liquid may be concentrated.
- step C1 first, the concentrated liquid and the aromatic hydrocarbon are mixed, and bisphenol is precipitated from the mixed liquid containing the concentrated liquid and the aromatic hydrocarbon by crystallization.
- the aromatic hydrocarbon to be mixed with the concentrated liquid include toluene, xylene, ethylbenzene, diethylbenzene, isopropylbenzene, mesitylene, etc. Toluene is preferred.
- Crystallization can usually be carried out by cooling a mixed liquid containing a concentrated liquid and an aromatic hydrocarbon.
- the temperature before crystallization is set to 60 to 100°C (preferably 70 to 90°C) and cooled to 40 to 70°C (preferably 40 to 65°C).
- the temperature before crystallization is set to 60 to 100°C (preferably 70 to 90°C) and cooled to 40 to 70°C (preferably 40 to 65°C).
- Solid-liquid separation can be performed by known means such as filtration and centrifugation.
- solid-liquid separation is performed using a horizontal belt filter, rotary vacuum filter, rotary pressure filter, batch filter, centrifugal filter separator, centrifugal sedimentation separator, a hybrid centrifuge (screen ball decanter), etc. be able to.
- the obtained bisphenol may be further purified by washing with water or suspension washing. Also, crystallization may be performed multiple times. By dissolving the bisphenol obtained in step C1 in an aromatic hydrocarbon and crystallizing the obtained solution, bisphenol with higher purity can be precipitated.
- the method for producing bisphenol of the present invention can be a method (2) for producing bisphenol having the following steps A, B2 and C2.
- Step A Step of decomposing the polycarbonate resin in a reaction solution containing the polycarbonate resin, the dialkyl carbonate, the aliphatic monoalcohol and the catalyst to obtain a polycarbonate decomposition solution containing bisphenol
- Step B2 Obtained in Step A
- Step C2 The bisphenol obtained in Step B2 and a step of recovering bisphenol from a solution containing an aromatic monoalcohol
- the process A of the bisphenol manufacturing method (2) is the same as the process A of the bisphenol manufacturing method (1).
- step B2 the dialkyl carbonate and the aliphatic monoalcohol can be distilled off by distilling the solution containing the polycarbonate decomposition solution and the aromatic monoalcohol.
- distillation can be carried out at a temperature of 50-200° C. and a pressure of 0.1 kPa to 150 kPa. It is also preferable to distill off at least part of the aromatic monoalcohol by distillation.
- the polycarbonate decomposition solution may be subjected to step B2 after neutralization and washing, as in step B1 of the method for producing bisphenol (1).
- Step B2 is carried out using, for example, a mixed liquid obtained by mixing the polycarbonate decomposition liquid obtained in Step A and an aromatic monoalcohol.
- the polycarbonate decomposition solution may be neutralized or washed, mixed with an aromatic monoalcohol, and subjected to step B2.
- Step C2 Crystallization or the like can be used to recover bisphenol from the solution containing bisphenol and aromatic monoalcohol obtained in step B2.
- a polycarbonate resin derived from bisphenol A is used and phenol is used as the aromatic monoalcohol in step B2
- a polycarbonate decomposition solution containing bisphenol A is obtained in step A
- bisphenol A and phenol are used in step B2.
- a solution containing In step C2 the solution containing bisphenol A and phenol is crystallized to obtain adduct crystals of bisphenol A and phenol, and then phenol is removed from the melt of the adduct crystals to obtain bisphenol A. .
- a solution containing bisphenol A and phenol can be incorporated into the reaction process and purification process of a manufacturing plant that manufactures bisphenol A from acetone and phenol, the recycling process of the mother liquor (the process of alkaline decomposition of bisphenol A in the mother liquor), etc. , Crystallization is performed together with bisphenol A produced in the production plant to obtain adduct crystals of bisphenol A and phenol, and then phenol is removed from the melt of the adduct crystals to obtain bisphenol A. good.
- Bisphenol obtained by the method for producing bisphenol of the present invention can be used in various applications such as optical materials, recording materials, insulating materials, transparent materials, electronic materials, adhesive materials, and heat-resistant materials.
- Various thermoplastic resins such as polyether resins, polyester resins, polyarylate resins, polycarbonate resins, polyurethane resins, acrylic resins, epoxy resins, unsaturated polyester resins, phenolic resins, polybenzoxazine resins, cyanates It can be used as a constituent component of various thermosetting resins such as resins, a curing agent, an additive, or a precursor thereof. It is also useful as an additive such as a color developer for heat-sensitive recording materials, an anti-fading agent, a bactericide, and an antibacterial and antifungal agent.
- thermoplastic resins and thermosetting resins it is preferable to use it as a raw material (monomer) for thermoplastic resins and thermosetting resins, and more preferably as a raw material for polycarbonate resins and epoxy resins, because it can impart good mechanical properties. It is also preferably used as a developer, and more preferably used in combination with a leuco dye and a discoloration temperature regulator.
- polycarbonate resins are selected from the group consisting of dialkyl carbonates, aliphatic monoalcohols, alkali metal hydroxides, alkali metal carbonates, alkali metal alkoxides, alkali metal oxides, chain alkylamines and pyridine.
- a method for producing a bisphenol-alkyl carbonate condensate represented by the following formula (III), which is decomposed in the presence of any catalyst hereinafter sometimes referred to as the “method for producing the condensate of the present invention”. It is a thing.
- R is a methyl group, an ethyl group, or a butyl group.
- the polycarbonate resin is a dialkyl carbonate, an aliphatic monoalcohol, an alkali metal hydroxide, an alkali metal carbonate, an alkali metal alkoxide, an alkali metal oxide, a chain alkylamine and pyridine.
- any catalyst selected from the group consisting of
- the types and amounts of the polycarbonate resin, dialkyl carbonate, aliphatic monoalcohol, and catalyst used in the method for producing a condensate of the present invention, the reaction temperature, the reaction time, etc. are the same as in the method for producing bisphenol of the present invention, and are suitable. Aspects are also the same. Further, similarly to the method for producing bisphenol of the present invention, the method for producing a condensate of the present invention comprises decomposing a polycarbonate resin in a slurry-like reaction liquid containing a polycarbonate resin, a dialkyl carbonate, an aliphatic monoalcohol and a catalyst. is preferred.
- the amount of aliphatic monoalcohol and the reaction time can be adjusted to produce a bisphenol-alkyl carbonate condensate as a by-product.
- a bisphenol-alkyl carbonate condensate can be obtained. Recovery of the bisphenol-alkyl carbonate condensate is as described above.
- the molar ratio of the aliphatic monoalcohol used to 1 mol of the repeating unit of the polycarbonate resin used is preferably less than 2.0 and 1.95 or less. , 1.9 or less, 1.85 or less, or 1.8 or less.
- a bisphenol-alkyl carbonate condensate can also be obtained by shortening the reaction time.
- alkyl carbonate group can be used as a protective group in the bisphenol-alkyl carbonate condensate, different functional groups can be selectively introduced into the two hydroxyl groups of bisphenol, leading to new products. .
- the present invention provides a method for producing a recycled polycarbonate resin (hereinafter referred to as "recycled polycarbonate of the present invention"), in which a recycled polycarbonate resin is produced using a bisphenol raw material containing bisphenol (recycled bisphenol) obtained by the method for producing bisphenol of the present invention. It may be described as "resin manufacturing method”).
- the method for producing recycled polycarbonate resin of the present invention utilizes a chemical recycling method for producing polycarbonate resin using recycled bisphenol obtained by decomposing polycarbonate resin contained in waste plastic or the like into bisphenol, which is a monomer, as a raw material.
- the method for producing the polycarbonate resin of the present invention can be carried out by appropriately selecting a known polymerization method for polycarbonate resins, except that a bisphenol raw material containing recycled bisphenol is used as the bisphenol.
- Polycarbonate resins are generally produced by polymerizing bisphenol and carbonic diester in the presence of a catalyst.
- the recycled polycarbonate resin can be obtained, for example, by polymerizing a bisphenol raw material containing recycled bisphenol (the bisphenol obtained by the method for producing a bisphenol of the present invention) and a diester carbonate raw material. can be done.
- a recycled polycarbonate resin can be produced by a method such as transesterifying a bisphenol raw material containing recycled bisphenol and a carbonate diester raw material such as diphenyl carbonate in the presence of an alkali metal compound and/or an alkaline earth metal compound. can.
- Recycled bisphenol may be used as the entire bisphenol raw material, or may be mixed with general bisphenol that is not recycled bisphenol and used as part of the bisphenol raw material.
- the amount of regenerated bisphenol is not particularly limited, and may be 0.1% by mass or more, 1% by mass or more, 10% by mass or more, 20% by mass or more, 30% by mass or more, 40% by mass or more, 50% by mass or more, or 70% by mass. % or more, 80% by mass or more, or 90% by mass or more.
- the larger the ratio of recycled bisphenol the more environmentally friendly it is. Therefore, from the viewpoint of consideration for the environment, the amount of recycled bisphenol relative to the bisphenol raw material is preferably large.
- the transesterification reaction can be carried out by appropriately selecting a known method, and an example of a method using diphenyl carbonate as a raw material for diester carbonate will be described below.
- the amount of diphenyl carbonate used with respect to the bisphenol raw material is preferably large in terms of the produced regenerated polycarbonate resin having few terminal hydroxyl groups and excellent thermal stability of the polymer. From the viewpoint of easy production of a recycled polycarbonate resin having a molecular weight, it is preferably small.
- the amount of diphenyl carbonate used per 1 mol of the bisphenol raw material used is usually 1.001 mol or more, preferably 1.002 mol or more, and usually 1.3 mol or less, preferably 1.0 mol or more. 2 mol or less.
- the bisphenol raw material and diphenyl carbonate can be supplied in solid form, but it is preferable to melt one or both of them and supply them in a liquid state.
- a transesterification catalyst is usually used when producing a recycled polycarbonate resin through a transesterification reaction between diphenyl carbonate and a bisphenol raw material.
- An alkali metal compound and/or an alkaline earth metal compound is preferably used as this transesterification catalyst. These may be used alone, or two or more of them may be used in any combination and ratio. Practically, it is desirable to use an alkali metal compound.
- the amount of the catalyst used per 1 mol of the bisphenol raw material or diphenyl carbonate is usually 0.05 ⁇ mol or more, preferably 0.08 ⁇ mol or more, more preferably 0.10 ⁇ mol or more, and usually 100 ⁇ mol or less, preferably is 50 ⁇ mol or less, more preferably 20 ⁇ mol or less.
- the amount of the catalyst used is within the above range, it is easy to obtain the polymerization activity necessary for producing a recycled polycarbonate resin having a desired molecular weight, the polymer color is excellent, and excessive branching of the polymer does not proceed. It is easy to obtain a polycarbonate resin with excellent fluidity during molding.
- both raw materials supplied to the raw material mixing tank are usually stirred uniformly and then supplied to the polymerization tank where the catalyst is added to produce the polymer.
- the recycled polycarbonate resin obtained by the method for producing a recycled polycarbonate resin of the present invention may be used as it is, or may be used as a recycled polycarbonate resin composition containing unused polycarbonate resin and recycled polycarbonate resin.
- the recycled polycarbonate resin composition can be obtained by appropriately selecting a known kneading method or the like to mix virgin polycarbonate resin and recycled polycarbonate resin.
- the amount of recycled polycarbonate resin is not particularly limited, but the larger the proportion of recycled polycarbonate resin, the more environmentally friendly.
- the amount of the recycled polycarbonate resin relative to the recycled polycarbonate resin composition is preferably 50% by mass or more, and the larger the amount, the higher is 70% by mass or more, 80% by mass or more, and 90% by mass or more. more preferred.
- the obtained recycled polycarbonate resin and composition can be molded into various molded articles such as optical members and optical recording media in the same manner as virgin polycarbonate resin.
- the present invention relates to a method for producing an epoxy resin, comprising obtaining bisphenol through the method for producing bisphenol of the present invention and then producing an epoxy resin using a polyhydric hydroxy compound starting material containing the bisphenol.
- the present invention also relates to a method for producing an epoxy resin, comprising further reacting an epoxy resin raw material containing the epoxy resin obtained through the above epoxy resin production method with a polyhydric hydroxy compound raw material to produce an epoxy resin.
- recycled bisphenol and/or an epoxy resin produced using recycled bisphenol is used to produce an epoxy resin (hereinafter referred to as "recycled epoxy resin" There is.) to manufacture.
- the method for producing the epoxy resin of the present invention is not particularly limited except that the recycled bisphenol (the bisphenol obtained by the method for producing the bisphenol of the present invention) and/or the epoxy resin produced using the recycled bisphenol is used as a raw material.
- a known manufacturing method can be used.
- regenerated bisphenol can be used as at least a part of the polyhydric hydroxy compound raw material for production using a one-step method, an oxidation method, or a two-step method.
- the obtained epoxy resin can also be used as at least a part of the epoxy resin raw material for production using the two-step method.
- epoxy resin raw material means an epoxy resin used as a raw material in the method for producing an epoxy resin of the present invention.
- Polyvalent hydroxy compound is a general term for dihydric or higher phenol compounds and dihydric or higher alcohol compounds, and "polyhydric hydroxy compound raw material” is used as a raw material for the method for producing an epoxy resin of the present invention. hydroxy compounds.
- the one-step method for producing an epoxy resin is a method of obtaining an epoxy resin by reacting regenerated bisphenol (the bisphenol obtained by the method for producing bisphenol of the present invention) with epihalohydrin.
- the method for producing an epoxy resin by an oxidation method is a method in which a regenerated bisphenol is allylated with an allyl halide (such as allyl chloride or allyl bromide) and then subjected to an oxidation reaction to obtain an epoxy resin.
- the two-step method for producing an epoxy resin is a method in which an epoxy resin raw material and a polyhydric hydroxy compound raw material are reacted, and recycled bisphenol and/or an epoxy resin produced using recycled bisphenol is used as the raw material.
- the method for producing the epoxy resin by the one-step method is not particularly limited as long as it is a known production method, and will be described in detail below.
- a polyhydroxy compound other than the regenerated bisphenol (hereinafter sometimes referred to as "another polyhydroxy compound”) may be used in combination with the regenerated bisphenol. That is, the method for producing an epoxy resin by the one-step method is a method of obtaining an epoxy resin by reacting a polyhydric hydroxy compound raw material with epihalohydrin, and at least a part of the polyhydric hydroxy compound raw material is a method of regenerated bisphenol. can be done.
- the content of regenerated bisphenol in the polyhydric hydroxy compound raw material is not particularly limited, but is preferably 1 to 100% by mass, more preferably 10 to 100% by mass, because a high content of regenerated bisphenol is environmentally friendly.
- polyhydric hydroxy compounds is a general term for dihydric or higher phenol compounds and dihydric or higher alcohol compounds, excluding regenerated bisphenol.
- the "polyhydroxy compound raw material” is the total polyhydroxy compound including the regenerated bisphenol and optionally other polyhydroxy compounds.
- polyhydric hydroxy compounds include bisphenol A, tetramethylbisphenol A, bisphenol F, tetramethylbisphenol F, bisphenol S, bisphenol C, bisphenol AD, bisphenol AF, hydroquinone, resorcin, methylresorcin, biphenol, tetramethylbiphenol, Dihydroxynaphthalene, dihydroxydiphenyl ether, thiodiphenols, phenol novolak resin, cresol novolak resin, phenol aralkyl resin, biphenyl aralkyl resin, naphthol aralkyl resin, terpene phenol resin, dicyclopentadiene phenol resin, bisphenol A novolak resin, naphthol novolak resin, Various polyhydric phenols such as brominated bisphenol A and brominated phenol novolak resins, and polyhydric phenols obtained by condensation reaction of various phenols with various aldehydes such as benzaldehyde, hydroxybenzalde
- Resins polyhydric phenol resins obtained by the condensation reaction of xylene resin and phenols, various phenolic resins such as co-condensation resins of heavy oils or pitches, phenols and formaldehydes, ethylene glycol, Chains such as methylene glycol, propylene glycol, 1,3-butanediol, 1,4-butanediol, 1,3-pentanediol, 1,4-pentanediol, 1,5-pentanediol, 1,6-hexanediol cycloaliphatic diols, cyclic aliphatic diols such as cyclohexanediol and cyclodecanediol, and polyalkylene ether glycols such as polyethylene ether glycol, polyoxytrimethylene ether glycol and polypropylene ether glycol.
- the polyvalent hydroxy compound raw material is dissolved in epihalohydrin to form a uniform solution.
- epihalohydrin epichlorohydrin or epibromohydrin is usually used, and epichlorohydrin is preferred in the present invention.
- the amount of epihalohydrin to be used is usually 1.0 to 14.0 equivalents, particularly 2.0 to 10.0 equivalents, per equivalent of hydroxyl groups in the starting polyhydroxy compound (all polyhydroxy compounds). is preferred.
- the amount of epihalohydrin is at least the above lower limit, it is preferable because the polymerization reaction can be easily controlled and the resulting epoxy resin can have an appropriate epoxy equivalent weight.
- the amount of epihalohydrin is equal to or less than the above upper limit, production efficiency tends to improve, which is preferable.
- an alkali metal hydroxide is added in an amount corresponding to usually 0.1 to 3.0 equivalents, preferably 0.8 to 2.0 equivalents, per 1 equivalent of the hydroxyl group of the polyvalent hydroxy compound raw material. It is added as a solid or an aqueous solution to react.
- the amount of the alkali metal hydroxide added is at least the above lower limit, the reaction between the unreacted hydroxyl groups and the produced epoxy resin is less likely to occur, and the polymerization reaction can be easily controlled, which is preferable.
- the amount of the alkali metal hydroxide to be added is equal to or less than the above upper limit because impurities due to side reactions are less likely to be generated.
- Alkali metal hydroxides used herein typically include sodium hydroxide or potassium hydroxide.
- This reaction can be carried out under normal pressure or reduced pressure, and the reaction temperature is preferably 20-200°C, more preferably 40-150°C.
- the reaction temperature is equal to or higher than the above lower limit, it is preferable because it facilitates the progress of the reaction and facilitates control of the reaction.
- the reaction temperature is equal to or lower than the above upper limit, the side reaction is less likely to proceed, and particularly the amount of polymer can be easily reduced, which is preferable.
- the reaction liquid is azeotroped while maintaining a predetermined temperature as necessary, and the condensed liquid obtained by cooling the volatilizing steam is separated into oil and water, and the oil content after removing the water is reacted. It is carried out while dehydrating by the method of returning to the system.
- the alkali metal hydroxide is added intermittently or continuously little by little over a period of preferably 0.1 to 24 hours, more preferably 0.5 to 10 hours, in order to suppress abrupt reaction.
- the addition time of the alkali metal hydroxide is longer than the above lower limit, it is possible to prevent the reaction from progressing rapidly, and the reaction temperature can be easily controlled, which is preferable. If the addition time is equal to or less than the above upper limit, the amount of polymer can be easily reduced, which is preferable.
- the insoluble by-product salt can be removed by filtration or removed by washing with water, and then unreacted epihalohydrin can be removed by heating and/or distillation under reduced pressure.
- quaternary ammonium salts such as tetramethylammonium chloride and tetraethylammonium bromide
- tertiary amines such as benzyldimethylamine and 2,4,6-tris(dimethylaminomethyl)phenol
- 2-ethyl Catalysts such as imidazoles such as 4-methylimidazole and 2-phenylimidazole
- phosphonium salts such as ethyltriphenylphosphonium iodide
- phosphines such as triphenylphosphine
- alcohols such as ethanol and isopropanol
- ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone
- ethers such as dioxane and ethylene glycol dimethyl ether
- glycol ethers such as methoxypropanol
- You may use an inert organic solvent, such as an aprotic polar solvent, such as.
- An organic solvent for dissolving the epoxy resin may be used for the reaction with the alkali.
- the organic solvent used in the reaction is not particularly limited, it is preferable to use a ketone-based organic solvent from the viewpoint of production efficiency, handleability, workability, and the like.
- an aprotic polar solvent may be used from the viewpoint of lowering the amount of hydrolyzable chlorine.
- ketone-based organic solvents examples include ketone-based solvents such as methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone. Methyl isobutyl ketone is particularly preferred because of its effects and ease of post-treatment. These may be used individually by 1 type, and may be used in mixture of 2 or more types.
- aprotic polar solvents examples include dimethylsulfoxide, diethylsulfoxide, dimethylsulfone, sulfolane, dimethylformamide, dimethylacetamide, hexamethylphosphoramide, and the like. These may be used individually by 1 type, and may be used in mixture of 2 or more types. Among these aprotic polar solvents, dimethylsulfoxide is preferred because it is readily available and has excellent effects.
- the amount of the solvent used is such that the concentration of the epoxy resin in the liquid to be treated with alkali is usually 1 to 95% by mass, preferably 5 to 80% by mass.
- alkali a solid or solution of alkali metal hydroxide can be used.
- alkali metal hydroxides include potassium hydroxide and sodium hydroxide, preferably sodium hydroxide.
- the alkali metal hydroxide may be dissolved in an organic solvent or water.
- the alkali metal hydroxide is used as a solution dissolved in an aqueous solvent or an organic solvent.
- the amount of the alkali metal hydroxide to be used is preferably 0.01 to 20.0 parts by mass or less per 100 parts by mass of the epoxy resin in terms of the solid content of the alkali metal hydroxide. More preferably, it is 0.10 to 10.0 parts by mass. If the amount of alkali metal hydroxide used is less than the above lower limit, the effect of reducing the total chlorine content is low.
- the reaction temperature is preferably 20-200°C, more preferably 40-150°C, and the reaction time is preferably 0.1-24 hours, more preferably 0.5-10 hours.
- excess alkali metal hydroxides and secondary salts can be removed by a method such as washing with water, and the organic solvent can be removed by heating and/or vacuum distillation and/or steam distillation.
- the method for producing an epoxy resin by an oxidation method is not particularly limited as long as it is a known production method. It can be carried out according to the methods described.
- the recycled bisphenol may be produced in combination with a polyhydric hydroxy compound other than the recycled bisphenol. That is, the method for producing an epoxy resin by an oxidation method is a method for obtaining an epoxy resin by allylating a polyhydroxy compound raw material with an allyl halide and then subjecting it to an oxidation reaction. Part can be a method in which the recycled bisphenol.
- the "polyhydroxy compound raw material” is a total polyhydroxy compound that is a combination of recycled bisphenol and other polyhydroxy compounds that are used as necessary.
- the hydroxy compound include those used in the one-step method.
- the content of regenerated bisphenol in the polyhydric hydroxy compound raw material is not particularly limited, but is preferably 1 to 100% by mass, more preferably 10 to 100% by mass, because a high content of regenerated bisphenol is environmentally friendly.
- the method for producing an epoxy resin by the two-step method is not particularly limited as long as it is a known production method, and will be described in detail below.
- the method for producing an epoxy resin by a two-step method has a step of reacting an epoxy resin raw material and a polyhydric hydroxy compound raw material, and at least part of the epoxy resin raw material is an epoxy resin produced using recycled bisphenol. and/or wherein at least a portion of the polyhydric hydroxy compound feedstock is regenerated bisphenol.
- the two-step method for producing an epoxy resin is any of the following methods (i) to (iii).
- the epoxy resin raw material is an epoxy resin other than the epoxy resin produced using recycled bisphenol.
- the polyhydric hydroxy compound raw material is a total polyhydric hydroxy compound obtained by combining regenerated bisphenol and other polyhydric hydroxy compounds used as necessary.
- the epoxy resin raw material is a total epoxy resin that is a combination of epoxy resin produced using recycled bisphenol and other epoxy resins that are used as necessary.
- the polyhydric hydroxy compound raw material is a total polyhydric hydroxy compound obtained by combining regenerated bisphenol and other polyhydric hydroxy compounds used as necessary.
- the epoxy resin raw material is a total epoxy resin that is a combination of an epoxy resin produced using recycled bisphenol and other epoxy resins that are used as necessary.
- the polyhydric hydroxy compound raw material is a polyhydric hydroxy compound other than the regenerated bisphenol.
- the epoxy resin produced using the regenerated bisphenol used in method (ii) and method (iii) can be obtained by a one-step epoxy resin production method or an oxidation method. Also, the epoxy resin obtained by method (i) may be used.
- the epoxy resin other than the epoxy resin produced using the recycled bisphenol is the same as the other epoxy resin described later in the method for producing a cured epoxy resin, and the other polyvalent hydroxy compound is the same as the one-step method. It is the same.
- the content of the regenerated bisphenol in the polyhydric hydroxy compound containing regenerated bisphenol is not particularly limited. Preferably, 10 to 100% by mass is more preferable.
- the content of the epoxy resin produced using the recycled bisphenol in the epoxy resin raw material containing the epoxy resin produced using the recycled bisphenol is not particularly limited. Since a high content of the epoxy resin produced using is environmentally friendly, it is preferably 1 to 100% by mass, more preferably 10 to 100% by mass.
- the equivalent ratio is within the above range, the molecular weight can be easily increased, and more terminal epoxy groups can be left, which is preferable.
- a catalyst may be used in the reaction by the two-step method, and as the catalyst, any compound having a catalytic ability to promote the reaction between an epoxy group and a phenolic hydroxyl group or an alcoholic hydroxyl group may be used. It's okay. Examples thereof include alkali metal compounds, organic phosphorus compounds, tertiary amines, quaternary ammonium salts, cyclic amines, imidazoles and the like. Among these, quaternary ammonium salts are preferred.
- one type of catalyst can be used alone, or two or more types can be used in combination. The amount of catalyst used is usually 0.001 to 10% by mass based on the epoxy resin raw material.
- a solvent may be used, and any solvent that dissolves the epoxy resin raw material may be used.
- examples thereof include aromatic solvents, ketone solvents, amide solvents, glycol ether solvents and the like. Only one type of solvent may be used, or two or more types may be used in combination.
- the resin concentration in the solvent is preferably 10 to 95% by mass. More preferably, it is 20 to 80% by mass.
- the solvent can be additionally added to continue the reaction. After completion of the reaction, the solvent can be removed or added as necessary.
- the reaction temperature is preferably 20-250°C, more preferably 50-200°C. If the reaction temperature is higher than the above upper limit, the resulting epoxy resin may deteriorate. Further, if the content is below the above lower limit, the reaction may not proceed sufficiently. Further, the reaction time is usually 0.1 to 24 hours, preferably 0.5 to 12 hours.
- an epoxy resin is obtained through the above-described method for producing an epoxy resin, and a composition containing the epoxy resin and a curing agent (hereinafter sometimes referred to as an "epoxy resin composition") ), the epoxy resin composition is cured to obtain a cured epoxy resin.
- the epoxy resin composition may contain epoxy resins other than the epoxy resin obtained by the method for producing an epoxy resin of the present invention (hereinafter sometimes simply referred to as "other epoxy resins"), Curing agents, curing accelerators, inorganic fillers, coupling agents, and the like can be appropriately blended.
- the content of the recycled epoxy resin in the epoxy resin composition is not particularly limited. Since a high recycled epoxy resin content is environmentally friendly, the recycled epoxy resin is preferably 40 parts by mass or more, more preferably 60 parts by mass or more, with respect to 100 parts by mass of all epoxy resin components in the epoxy resin composition. When other epoxy resins are included, the recycled epoxy resin can be 40 to 99 parts by mass, or 60 to 99 parts by mass, etc., with respect to 100 parts by mass of all epoxy resin components in the epoxy resin composition.
- the "total epoxy resin component” corresponds to the amount of all epoxy resins contained in the epoxy resin composition, and is the sum of the recycled epoxy resin and other epoxy resins used as necessary.
- the curing agent refers to a substance that contributes to cross-linking reaction and/or chain extension reaction between epoxy groups of epoxy resin.
- a substance is usually called a "curing accelerator”, it can be regarded as a curing agent as long as it contributes to the cross-linking reaction and/or chain extension reaction between the epoxy groups of the epoxy resin.
- the content of the curing agent is preferably 0.1 to 1000 parts by mass with respect to 100 parts by mass of the total epoxy resin component. Moreover, it is more preferably 500 parts by mass or less.
- any one generally known as an epoxy resin curing agent can be used.
- phenolic curing agents, aliphatic amines, polyether amines, alicyclic amines, amine curing agents such as aromatic amines, acid anhydride curing agents, amide curing agents, tertiary amines, imidazoles, etc. is mentioned.
- One curing agent may be used alone, or two or more curing agents may be used in combination. When two or more curing agents are used in combination, they may be mixed in advance to prepare a mixed curing agent before use, or the recycled epoxy resin obtained by the method for producing an epoxy resin of the present invention and other epoxy resins. Each component of the curing agent may be added separately and mixed at the same time.
- phenol-based curing agents include recycled bisphenol, bisphenol A, tetramethylbisphenol A, bisphenol F, tetramethylbisphenol F, bisphenol C, bisphenol S, bisphenol AD, bisphenol AF, hydroquinone, resorcinol, methylresorcinol, biphenol, Tetramethylbiphenol, dihydroxynaphthalene, dihydroxydiphenyl ether, thiodiphenols, phenol novolak resin, cresol novolak resin, phenol aralkyl resin, biphenyl aralkyl resin, naphthol aralkyl resin, terpene phenol resin, dicyclopentadiene phenol resin, bisphenol A novolak resin, Various polyhydric phenols such as trisphenolmethane type resins, naphthol novolac resins, brominated bisphenol A, brominated phenol novolac resins, various phenols and various aldehydes such as
- phenol-based curing agents may be used alone or in combination of two or more in an arbitrary combination and blending ratio.
- the amount of the phenol-based curing agent is preferably 0.1 to 1000 parts by mass, more preferably 500 parts by mass or less with respect to 100 parts by mass of all epoxy resin components in the epoxy resin composition.
- amine curing agent examples include aliphatic amines, polyetheramines, alicyclic amines, aromatic amines and the like.
- aliphatic amines examples include ethylenediamine, 1,3-diaminopropane, 1,4-diaminopropane, hexamethylenediamine, 2,5-dimethylhexamethylenediamine, trimethylhexamethylenediamine, diethylenetriamine, iminobispropylamine, bis( hexamethylene)triamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, N-hydroxyethylethylenediamine, tetra(hydroxyethyl)ethylenediamine and the like.
- polyetheramines examples include triethylene glycol diamine, tetraethylene glycol diamine, diethylene glycol bis(propylamine), polyoxypropylene diamine, and polyoxypropylene triamines.
- alicyclic amines examples include isophoronediamine, methacenediamine, N-aminoethylpiperazine, bis(4-amino-3-methyldicyclohexyl)methane, bis(aminomethyl)cyclohexane, 3,9-bis(3-amino Propyl)-2,4,8,10-tetraoxaspiro(5,5)undecane, norbornenediamine and the like are exemplified.
- Aromatic amines include tetrachloro-p-xylylenediamine, m-xylylenediamine, p-xylylenediamine, m-phenylenediamine, o-phenylenediamine, p-phenylenediamine, 2,4-diaminoanisole, 2,4 -toluenediamine, 2,4-diaminodiphenylmethane, 4,4'-diaminodiphenylmethane, 4,4'-diamino-1,2-diphenylethane, 2,4-diaminodiphenylsulfone, 4,4'-diaminodiphenylsulfone, m-aminophenol, m-aminobenzylamine, benzyldimethylamine, 2-(dimethylaminomethyl)phenol, triethanolamine, methylbenzylamine, ⁇ -(m-aminophenyl)ethylamine
- the amine-based curing agents listed above may be used alone, or two or more of them may be used in any combination and in any mixing ratio.
- the above amine-based curing agent can be used so that the equivalent ratio of the functional groups in the curing agent to the epoxy groups in all the epoxy resin components contained in the epoxy resin composition is in the range of 0.1 to 2.0. preferable. More preferably, the equivalent ratio is in the range of 0.8 to 1.2. Within this range, unreacted epoxy groups and functional groups of the curing agent are less likely to remain, which is preferable.
- Tertiary amines include 1,8-diazabicyclo(5,4,0)undecene-7, triethylenediamine, benzyldimethylamine, triethanolamine, dimethylaminoethanol, tris(dimethylaminomethyl)phenol and the like. .
- the tertiary amines listed above may be used singly or two or more of them may be used in any combination and blending ratio.
- the above tertiary amine can be used so that the equivalent ratio of the functional group in the curing agent to the epoxy group in all the epoxy resin components contained in the epoxy resin composition is in the range of 0.1 to 2.0. preferable. More preferably, the equivalent ratio is in the range of 0.8 to 1.2. Within this range, unreacted epoxy groups and functional groups of the curing agent are less likely to remain, which is preferable.
- acid anhydride curing agent examples include acid anhydrides and modified acid anhydrides.
- acid anhydrides examples include phthalic anhydride, trimellitic anhydride, pyromellitic anhydride, benzophenonetetracarboxylic anhydride, dodecenylsuccinic anhydride, polyadipic anhydride, polyazelaic anhydride, and polysebacic acid.
- Anhydride poly(ethyloctadecanedioic anhydride), poly(phenylhexadecanedioic anhydride), tetrahydrophthalic anhydride, methyltetrahydrophthalic anhydride, methylhexahydrophthalic anhydride, hexahydrophthalic anhydride , methylhimic acid anhydride, trialkyltetrahydrophthalic anhydride, methylcyclohexene dicarboxylic acid anhydride, methylcyclohexene tetracarboxylic acid anhydride, ethylene glycol bistrimellitate dianhydride, het acid anhydride, nadic acid anhydride, methyl nadic anhydride, 5-(2,5-dioxotetrahydro-3-furanyl)-3-methyl-3-cyclohexane-1,2-dicarboxylic anhydride, 3,4-dicarboxy-1,2, 3,4-tetra
- Modified acid anhydrides include, for example, those obtained by modifying the above-mentioned acid anhydrides with glycol.
- glycols that can be used for modification include alkylene glycols such as ethylene glycol, propylene glycol and neopentyl glycol, and polyether glycols such as polyethylene glycol, polypropylene glycol and polytetramethylene ether glycol. mentioned.
- polyether glycols such as polyethylene glycol, polypropylene glycol and polytetramethylene ether glycol. mentioned.
- two or more of these glycols and/or copolymerized polyether glycols of polyether glycols can also be used.
- the acid anhydride-based curing agents listed above may be used alone or in combination of two or more in any combination and amount.
- the equivalent ratio of the functional group in the curing agent to the epoxy groups in all the epoxy resin components in the epoxy resin composition is in the range of 0.1 to 2.0. is preferred. More preferably, the equivalent ratio is in the range of 0.8 to 1.2. Within this range, unreacted epoxy groups and functional groups of the curing agent are less likely to remain, which is preferable.
- amide curing agents include dicyandiamide and derivatives thereof, and polyamide resins.
- the amide-based curing agent may be used alone, or two or more of them may be used in any combination and ratio.
- imidazoles examples include 2-phenylimidazole, 2-ethyl-4(5)-methylimidazole, 2-phenyl-4-methylimidazole, 1-benzyl-2-methylimidazole, 1-benzyl-2-phenylimidazole, 1 -Cyanoethyl-2-undecylimidazole, 1-cyano-2-phenylimidazole, 1-cyanoethyl-2-undecylimidazole trimellitate, 1-cyanoethyl-2-phenylimidazolium trimellitate, 2,4-diamino- 6-[2′-methylimidazolyl-(1′)]-ethyl-s-triazine, 2,4-diamino-6-[2′-ethyl-4′-methylimidazolyl-(1′)]-ethyl-s -triazine, 2,4-diamino-6-[2′-methylimidazolyl-(
- imidazoles Since imidazoles have catalytic activity, they can be generally classified as curing accelerators, but in the present invention they are classified as curing agents.
- the above-mentioned imidazoles may be used singly or as a mixture of two or more in any combination and ratio.
- imidazoles When imidazoles are used, it is preferable to use imidazoles in an amount of 0.1 to 20% by mass based on the total of all epoxy resin components and imidazoles in the epoxy resin composition.
- Other curing agents can be used in the epoxy resin composition in addition to the curing agents described above.
- Other curing agents that can be used in the epoxy resin composition are not particularly limited, and all those generally known as curing agents for epoxy resins can be used. These other curing agents may be used alone or in combination of two or more.
- the epoxy resin composition can contain epoxy resins other than the epoxy resin obtained by the method for producing an epoxy resin of the present invention. Various physical properties can be improved by including other epoxy resins.
- epoxy resins that can be used in the epoxy resin composition include all epoxy resins other than the epoxy resin obtained by the method for producing an epoxy resin of the present invention. Specific examples include bisphenol A-type epoxy resin, bisphenol C-type epoxy resin, trisphenolmethane-type epoxy resin, anthracene-type epoxy resin, phenol-modified xylene resin-type epoxy resin, bisphenolcyclododecyl-type epoxy resin, and bisphenoldiisopropylideneresorcin type.
- Epoxy resin bisphenol F type epoxy resin, bisphenol AD type epoxy resin, bisphenol AF type epoxy resin, hydroquinone type epoxy resin, methylhydroquinone type epoxy resin, dibutylhydroquinone type epoxy resin, resorcin type epoxy resin, methylresorcin type epoxy resin, biphenol type epoxy resin, tetramethylbiphenol type epoxy resin, tetramethylbisphenol F type epoxy resin, dihydroxydiphenyl ether type epoxy resin, epoxy resin derived from thiodiphenols, dihydroxynaphthalene type epoxy resin, dihydroxyanthracene type epoxy resin, dihydroxydihydro Anthracene type epoxy resin, dicyclopentadiene type epoxy resin, epoxy resin derived from dihydroxystilbenes, phenol novolac type epoxy resin, cresol novolak type epoxy resin, bisphenol A novolac type epoxy resin, naphthol novolac type epoxy resin, phenol aralkyl type Epoxy resins, naphthol aralkyl type
- the content thereof is preferably 1 to 60 parts by mass, more preferably 40 parts by mass, based on 100 parts by mass of all epoxy resin components in the composition. It is below the department.
- the epoxy resin composition preferably contains a curing accelerator.
- a curing accelerator By including a curing accelerator, it is possible to shorten the curing time and lower the curing temperature, and to easily obtain a desired cured product.
- the curing accelerator is not particularly limited, but specific examples include organic phosphines, phosphorous compounds such as phosphonium salts, tetraphenyl boron salts, organic acid dihydrazides, boron halide amine complexes, and the like.
- Phosphorus compounds that can be used as curing accelerators include triphenylphosphine, diphenyl(p-tolyl)phosphine, tris(alkylphenyl)phosphine, tris(alkoxyphenyl)phosphine, tris(alkyl/alkoxyphenyl)phosphine, tris( dialkylphenyl)phosphine, tris(trialkylphenyl)phosphine, tris(tetraalkylphenyl)phosphine, tris(dialkoxyphenyl)phosphine, tris(trialkoxyphenyl)phosphine, tris(tetraalkoxyphenyl)phosphine, trialkylphosphine, dialkyl Organic phosphines such as arylphosphines and alkyldiarylphosphines, complexes of these organic phosphines with organic borons, and these organic phosphine
- organic phosphines and phosphonium salts are preferred, and organic phosphines are most preferred.
- only one type may be used, or two or more types may be mixed and used in an arbitrary combination and ratio.
- the curing accelerator is preferably used in a range of 0.1 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of all epoxy resin components in the epoxy resin composition.
- the content of the curing accelerator is at least the above lower limit, a good curing acceleration effect can be obtained.
- An inorganic filler can be blended into the epoxy resin composition.
- inorganic fillers include fused silica, crystalline silica, glass powder, alumina, calcium carbonate, calcium sulfate, talc, and boron nitride. These may be used alone, or two or more of them may be used in any combination and blending ratio.
- the blending amount of the inorganic filler is preferably 10 to 95% by mass of the entire epoxy resin composition.
- release agent can be blended in the epoxy resin composition.
- release agents include natural waxes such as carnauba wax, synthetic waxes such as polyethylene wax, higher fatty acids such as stearic acid and zinc stearate and their metal salts, and hydrocarbon release agents such as paraffin. can be done. These may be used alone, or two or more of them may be used in any combination and blending ratio.
- the amount of the release agent to be blended is preferably 0.001 to 10.0 parts by mass with respect to 100 parts by mass of all the epoxy resin components in the epoxy resin composition. It is preferable that the content of the release agent is within the above range, because good release properties can be exhibited while maintaining curing properties.
- a coupling agent can be added to the epoxy resin composition.
- the coupling agent is preferably used in combination with the inorganic filler, and the addition of the coupling agent can improve the adhesion between the matrix epoxy resin and the inorganic filler.
- Examples of coupling agents include silane coupling agents and titanate coupling agents.
- silane coupling agents include epoxysilanes such as ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropyltriethoxysilane, ⁇ -(3,4-epoxycyclohexyl)ethyltrimethoxysilane, ⁇ - Aminopropyltriethoxysilane, N- ⁇ (aminoethyl) ⁇ -aminopropyltrimethoxysilane, N- ⁇ (aminoethyl) ⁇ -aminopropylmethyldimethoxysilane, ⁇ -aminopropyltrimethoxysilane, ⁇ -ureidopropyltriethoxy aminosilanes such as silane, mercaptosilanes such as 3-mercaptopropyltrimethoxysilane, p-styryltrimethoxysilane, vinyltrichlorosilane, vinyltris( ⁇ -methoxy
- titanate coupling agents include isopropyl triisostearoyl titanate, isopropyl tri(N-aminoethyl/aminoethyl) titanate, diisopropyl bis(dioctylphosphate) titanate, tetraisopropyl bis(dioctylphosphite) titanate, tetraoctyl bis ( ditridecylphosphite) titanate, tetra(2,2-diallyloxymethyl-1-butyl)bis(ditridecyl)phosphite titanate, bis(dioctylpyrophosphate)oxyacetate titanate, bis(dioctylpyrophosphate)ethylene titanate and the like. be done.
- any one of these coupling agents may be used alone, or two or more may be used in any combination and ratio.
- the compounding amount is preferably 0.001 to 10.0 parts by mass with respect to 100 parts by mass of the total epoxy resin component. If the amount of the coupling agent is at least the above lower limit, the effect of improving the adhesion between the matrix epoxy resin and the inorganic filler tends to be enhanced by adding the coupling agent. On the other hand, if the amount of the coupling agent is less than the above upper limit, the coupling agent is less likely to bleed out from the resulting cured product, which is preferable.
- compositions other than those described above can be added to the epoxy resin composition.
- Other compounding components include, for example, flame retardants, plasticizers, reactive diluents, pigments, etc., and can be appropriately compounded as necessary. However, this does not preclude the use of ingredients other than those listed above.
- Flame retardants include halogen-based flame retardants such as brominated epoxy resins and brominated phenol resins, antimony compounds such as antimony trioxide, phosphorus-based flame retardants such as red phosphorus, phosphate esters and phosphines, and melamine derivatives. Nitrogen flame retardants and inorganic flame retardants such as aluminum hydroxide and magnesium hydroxide can be used.
- a cured epoxy resin can be obtained by curing the epoxy resin composition.
- the curing method is not particularly limited, but usually a cured product can be obtained by a thermosetting reaction by heating.
- a thermosetting reaction it is preferable to appropriately select the curing temperature depending on the type of curing agent used. For example, when a phenolic curing agent is used, the curing temperature is usually 80-250°C.
- the reaction time is preferably 0.01 to 20 hours. When the reaction time is at least the above lower limit, the curing reaction tends to proceed sufficiently, which is preferable. On the other hand, when the reaction time is equal to or less than the above upper limit, deterioration due to heating and energy loss during heating are easily reduced, which is preferable.
- the epoxy resin cured product obtained by curing the epoxy resin composition has a high elastic modulus at 250° C., and a cured product excellent in heat deformation resistance can be obtained. Therefore, the epoxy resin cured product can be effectively used in any application as long as these physical properties are required.
- paints such as electrodeposition paints for automobiles, heavy-duty anti-corrosion paints for ships and bridges, and paints for the inner surface of beverage cans; Suitable for any application such as seismic reinforcement of bridges, reinforcement of concrete, flooring of buildings, lining of water supply facilities, drainage/permeable pavement, civil engineering, construction, and adhesives for vehicles and aircraft. can be done.
- the epoxy resin composition may be used after curing for the above applications, or may be cured during the manufacturing process for the above applications.
- Viscosity average molecular weight (Mv) Viscosity average molecular weight (Mv) is obtained by dissolving polycarbonate resin in methylene chloride (concentration 6.0 g / L), measuring specific viscosity ( ⁇ sp) at 20 ° C. using Ubbelohde viscosity tube, viscosity average molecular weight according to the following formula (Mv) was calculated.
- the pellet YI (transparency of polycarbonate resin) was evaluated by measuring the YI value (yellowness index value) of polycarbonate resin pellets in reflected light according to ASTM D1925.
- a spectrophotometer "CM-5" manufactured by Konica Minolta Co., Ltd. was used as the apparatus, and the measurement conditions were a measurement diameter of 30 mm and SCE.
- a calibration glass for petri dish measurement "CM-A212" was fitted into the measurement part, and a zero calibration box “CM-A124" was placed over it to perform zero calibration, followed by white calibration using the built-in white calibration plate. .
- YI was -0.58 ⁇ 0.01.
- YI was measured by filling a cylindrical glass container with an inner diameter of 30 mm and a height of 50 mm with pellets to a depth of about 40 mm. The operation of taking out the pellets from the glass container and measuring again was repeated twice, and the average value of the measured values of a total of three times was used.
- Table 1 summarizes the reaction yields of the catalyst, solvent, and bisphenol in Examples 1 to 4 and Comparative Example 1.
- Dilute sulfuric acid was added to the resulting reaction solution until the pH of the aqueous phase reached 6.
- the precipitated potassium sulfate was filtered off by filtration under reduced pressure to obtain a uniform extract.
- the extracted liquid was transferred to a distillation apparatus equipped with a thermometer, a stirring blade, a distillation tube, and a pressure regulator.
- the pressure was changed from normal pressure (760 Torr) to 120 Torr, the internal temperature was raised from room temperature to 80° C. while observing the amount of distillation, and 392 g of a fraction was withdrawn to obtain a still residue.
- the whole amount of the obtained cake was supplied to a jacket-type separable flask equipped with a Dimroth condenser, a stirring blade, and a thermometer under a nitrogen atmosphere. After that, 10 g of dimethyl carbonate and 280 g of toluene were supplied. The resulting slurry liquid was heated to 80° C. to form a uniform solution. The homogeneous solution obtained was washed with 100 g of demineralized water three times. After that, the temperature was lowered to 5° C. to obtain a slurry liquid. The resulting slurry liquid was filtered using a centrifugal separator to obtain a fine cake. Using an evaporator equipped with an oil bath, the entire amount of the fine cake was dried at an oil bath temperature of 85° C. and 15 Torr for 3 hours to obtain 121 g of a solid.
- the rotation speed of the stirrer was set to 100 times per minute, and the pressure in the reactor was increased to 101 in absolute pressure over 40 minutes while distilling off the phenol by-product of the oligomerization reaction of bisphenol A and diphenyl carbonate in the reactor.
- the pressure was reduced from 3 kPa to 13.3 kPa.
- the pressure in the reactor was maintained at 13.3 kPa, and transesterification was carried out for 80 minutes while further distilling off phenol.
- the external temperature of the reaction vessel was raised to 250° C., and the internal pressure of the reaction vessel was reduced from 13.3 kPa to 399 Pa in absolute pressure over 40 minutes to remove distilled phenol out of the system.
- the temperature outside the reaction vessel was raised to 290° C.
- the absolute pressure in the reaction vessel was reduced to 30 Pa, and a polycondensation reaction was carried out.
- the polycondensation reaction was terminated when the stirrer in the reaction vessel reached a predetermined stirring power.
- the time from raising the temperature to 290° C. to completing the polymerization was 140 minutes.
- the pressure in the reactor was restored to 101.3 kPa in terms of absolute pressure with nitrogen, and then the pressure was increased to 0.2 MPa in terms of gauge pressure, and the polycarbonate resin was discharged from the bottom of the reactor in the form of strands to obtain a polycarbonate resin in strands. .
- the strand was pelletized using a rotary cutter to obtain a polycarbonate resin in the form of pellets.
- the resulting polycarbonate resin had a viscosity-average molecular weight (Mv) of 20,900 and a pellet YI of 8.4.
- Example 5 and Comparative Example 2 the type of catalyst, the production rate of bisphenol A (BPA), the melt color of the obtained bisphenol A (BPA), and the obtained polycarbonate (PC) resin pellets YI are shown in Table 2. summarized. From Table 2, it can be seen that the melt color of the bisphenol A obtained by using potassium hydroxide is good, and the pellets YI of the obtained polycarbonate resin are also good.
- the method for producing bisphenol of the present invention can use a general-purpose catalyst, and the catalyst cost is low.
- 500 g of sodium hydroxide is 1,250 yen
- 500 g of potassium hydroxide is 1,400 yen
- 500 mL of triethylamine is 1,450 yen
- 100 g of potassium carbonate is 2,200 yen.
- 5 g of TBD costs 16,300 yen, and when TBD is used, the cost of the catalyst becomes high in order to obtain the same production rate of bisphenol A.
- the mixture was reacted for 3 hours while maintaining the jacket temperature at 65° C. to obtain a uniform reaction solution.
- potassium sulfate was filtered to obtain a filtrate.
- the filtrate was placed in an eggplant flask and dried under full vacuum using an evaporator equipped with an oil bath to obtain 57 g of a solid.
- a portion of the obtained solid was analyzed by high-performance liquid chromatography to find 87.3% by mass of bisphenol A and 12.7% by mass of bisphenol-methyl carbonate condensate.
- Example 9A 46 g of bisphenol A obtained in Example 5 (BPA purity of 99%), 259 g of epichlorohydrin, 100 g of isopropanol, and 36 g of water were placed in a 1-liter four-necked flask equipped with a thermometer, a stirrer, and a cooling tube, and the temperature was raised to 40°C. After the mixture was heated and uniformly dissolved, 38 g of a 48.5% by weight sodium hydroxide aqueous solution was added dropwise over 90 minutes. Simultaneously with the dropping, the temperature was raised from 40° C. to 65° C. over 90 minutes.
- reaction solution was held at 65°C for 30 minutes to complete the reaction, transferred to a 1 L separating funnel, added with 69 g of water at 65°C, and allowed to stand at 65°C for 1 hour. After standing, the water layer was extracted from the separated oil layer and water layer, and by-product salts and excess sodium hydroxide were removed. After that, epichlorohydrin was completely removed under reduced pressure at 150°C. After that, 102 g of methyl isobutyl ketone was charged, heated to 65° C. and dissolved uniformly, then 1.4 g of a 48.5% by weight sodium hydroxide aqueous solution was charged, reacted for 60 minutes, and then 57 g of methyl isobutyl ketone.
- Example 9A The epoxy equivalent of the obtained epoxy resin was measured according to JISK7236 (2009) and found to be 179 g/equivalent.
- reaction solution was kept at 65°C for 30 minutes to complete the reaction, transferred to a 1 L separating funnel, added with 69 g of water at 65°C, and allowed to stand at 65°C for 1 hour. After standing, the water layer was extracted from the separated oil layer and water layer, and by-product salts and excess sodium hydroxide were removed. After that, epichlorohydrin was completely removed under reduced pressure at 150°C. After that, 102 g of methyl isobutyl ketone was charged, heated to 65° C. and dissolved uniformly, then 1.4 g of a 48.5% by weight sodium hydroxide aqueous solution was charged, reacted for 60 minutes, and then 57 g of methyl isobutyl ketone.
- Example 9B and Reference Example 1B (Epoxy resin composition)
- the epoxy resin of Example 9A or Reference Example 1A a curing agent (trade name Rikacid MH-700 manufactured by Shin Nippon Rika Co., Ltd.) and a curing catalyst (trade name Cure Sol 2E4MZ manufactured by Shikoku Kasei Kogyo Co., Ltd.)
- the ingredients were weighed, stirred and mixed at room temperature until uniform, to obtain an epoxy resin composition.
- Epoxy resin cured product Two glass plates to which the release PET film was adhered were prepared, and the distance between the two glass plates was adjusted to 3 mm with the release PET film on the inner side to prepare a mold. An epoxy resin composition was cast into this mold and heated at 100° C. for 3 hours and then at 140° C. for 3 hours to obtain a cured epoxy resin. The resulting cured product was cut into a length of 5 cm, a width of 1 cm and a thickness of 3 mm to obtain a test piece.
- test piece was heated from 30° C. to 280° C. at a rate of 5° C./min in a three-point bending mode using a thermomechanical analyzer (DMA: EXSTAR6100 manufactured by Seiko Instruments Inc.), and E′ at 250° C. was measured. , 250° C. elastic modulus.
- DMA thermomechanical analyzer
- the reaction solution was extracted and weighed to be 243.8 g.
- Example 11 A first decomposition step was performed in the same manner as in Example 10 to obtain a first decomposition solution (uniform reaction solution).
- a first decomposition solution uniform reaction solution.
- methanol was 14.6% by mass and dimethyl carbonate was 55.3% by mass.
- Dilute sulfuric acid was added to the resulting reaction solution until the pH of the aqueous phase reached 6.
- the precipitated potassium sulfate was filtered off by filtration under reduced pressure to obtain a uniform extract.
- the obtained extracted liquid was dried using an evaporator equipped with an oil bath to obtain bisphenol.
- reaction solution was extracted and weighed to find 243.6 g.
- Example 13 A first decomposition step was performed in the same manner as in Example 10 to obtain a first decomposition solution (uniform reaction solution).
- a first decomposition solution uniform reaction solution.
- the composition was confirmed by gas chromatography, it was 14.7% by mass of methanol and 55.2% by mass of dimethyl carbonate.
- the reaction liquid was extracted and weighed to be 248.8 g.
- Example 14 A first decomposition step was performed in the same manner as in Example 10 to obtain a first decomposition solution (uniform reaction solution).
- a first decomposition solution uniform reaction solution.
- methanol was 14.7% by mass and dimethyl carbonate was 55.2% by mass.
- the reaction solution was extracted and weighed to find 235.4 g.
- Example 10-14 The results of Examples 10-14 are summarized in Table 4. From Table 4, it can be seen that by adding water during the reaction to hydrolyze the dialkyl carbonate, the decomposition reaction of bisphenol A can be accelerated and the yield of bisphenol A can be further improved. In addition, by adjusting the amount of water to be added within a certain range, the aliphatic monoalcohol is regenerated from the dialkyl carbonate produced by the alcoholysis of the polycarbonate resin, and the ratio of the dialkyl carbonate and the aliphatic monoalcohol in the recovered mixture is changed to , it is possible to maintain a ratio (80% by mass to 120% by mass) that is easy to reuse in the first decomposition step.
- the mixture was reacted for 3 hours while maintaining the jacket temperature at 70° C. to obtain a uniform reaction solution.
- the reaction solution was homogeneous 3 hours after the start of decomposition.
- the reaction solution was homogeneous 3 hours after the start of decomposition.
- the reaction solution was homogeneous 3 hours after the start of decomposition.
- the reaction solution was homogeneous 3 hours after the start of decomposition.
- Example 15-19 and Comparative Examples 3-5 are summarized in Table 5. From Table 5, it can be seen that the dissolution rate and decomposition rate of the polycarbonate resin can be maintained by supplying an appropriate amount of the dialkyl carbonate solvent to the repeating units of the polycarbonate resin to be decomposed. If the amount of dialkyl carbonate supplied is small with respect to the repeating units of the polycarbonate resin, the rate of dissolution of the polycarbonate resin will decrease, and the time required for decomposition of the polycarbonate resin will lengthen, which is inefficient.
- chemical recycling can be used to obtain useful compounds such as bisphenol from waste plastics. Furthermore, using these, polycarbonate resins and epoxy resins can be produced again, which is industrially useful.
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JP2003231774A (ja) * | 2002-02-12 | 2003-08-19 | Victor Co Of Japan Ltd | 廃プラスチックからの有用物回収方法 |
JP2004051620A (ja) * | 2002-05-30 | 2004-02-19 | Victor Co Of Japan Ltd | 廃プラスチックからの有用物回収方法 |
JP2004339389A (ja) * | 2003-05-16 | 2004-12-02 | Teijin Ltd | 芳香族ポリカーボネートの解重合法 |
JP2005008773A (ja) * | 2003-06-19 | 2005-01-13 | Victor Co Of Japan Ltd | 廃プラスチックからの有用物回収方法 |
WO2020257234A1 (en) * | 2019-06-19 | 2020-12-24 | Sabic Global Technologies B.V. | Isolation of bisphenol a from depolymerization of a poly(carbonate) |
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JP2004051620A (ja) * | 2002-05-30 | 2004-02-19 | Victor Co Of Japan Ltd | 廃プラスチックからの有用物回収方法 |
JP2004339389A (ja) * | 2003-05-16 | 2004-12-02 | Teijin Ltd | 芳香族ポリカーボネートの解重合法 |
JP2005008773A (ja) * | 2003-06-19 | 2005-01-13 | Victor Co Of Japan Ltd | 廃プラスチックからの有用物回収方法 |
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