WO2022209233A1 - 乾燥イオン交換樹脂の製造方法および製造装置、ならびに被処理液の精製方法および精製装置 - Google Patents
乾燥イオン交換樹脂の製造方法および製造装置、ならびに被処理液の精製方法および精製装置 Download PDFInfo
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- WO2022209233A1 WO2022209233A1 PCT/JP2022/003045 JP2022003045W WO2022209233A1 WO 2022209233 A1 WO2022209233 A1 WO 2022209233A1 JP 2022003045 W JP2022003045 W JP 2022003045W WO 2022209233 A1 WO2022209233 A1 WO 2022209233A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- exchange resin
- cation exchange
- less
- liquid
- dry
- Prior art date
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- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 title claims abstract description 269
- 239000003456 ion exchange resin Substances 0.000 title claims abstract description 167
- 229920003303 ion-exchange polymer Polymers 0.000 title claims abstract description 167
- 239000007788 liquid Substances 0.000 title claims abstract description 158
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000003729 cation exchange resin Substances 0.000 claims abstract description 110
- 229910052751 metal Inorganic materials 0.000 claims abstract description 105
- 239000002184 metal Substances 0.000 claims abstract description 105
- 239000002253 acid Substances 0.000 claims abstract description 81
- 239000012535 impurity Substances 0.000 claims abstract description 80
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 77
- 239000011707 mineral Substances 0.000 claims abstract description 77
- 238000001035 drying Methods 0.000 claims abstract description 69
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 143
- 229920005989 resin Polymers 0.000 claims description 123
- 239000011347 resin Substances 0.000 claims description 123
- 238000000746 purification Methods 0.000 claims description 68
- 239000013522 chelant Substances 0.000 claims description 63
- 239000011734 sodium Substances 0.000 claims description 19
- 239000011575 calcium Substances 0.000 claims description 17
- 239000011777 magnesium Substances 0.000 claims description 17
- 238000005342 ion exchange Methods 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 229910052791 calcium Inorganic materials 0.000 claims description 9
- 229910052749 magnesium Inorganic materials 0.000 claims description 9
- 229910052708 sodium Inorganic materials 0.000 claims description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 8
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 8
- 239000003957 anion exchange resin Substances 0.000 claims description 8
- 230000035699 permeability Effects 0.000 claims description 8
- NBZBKCUXIYYUSX-UHFFFAOYSA-N iminodiacetic acid Chemical group OC(=O)CNCC(O)=O NBZBKCUXIYYUSX-UHFFFAOYSA-N 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- IAANMKMHMYZVOC-UHFFFAOYSA-N aminomethyl dihydrogen phosphate Chemical group NCOP(O)(O)=O IAANMKMHMYZVOC-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 238000010828 elution Methods 0.000 abstract description 20
- 239000000243 solution Substances 0.000 description 79
- 238000005406 washing Methods 0.000 description 75
- 238000003860 storage Methods 0.000 description 23
- 239000002699 waste material Substances 0.000 description 22
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 21
- 239000003125 aqueous solvent Substances 0.000 description 20
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 18
- 125000000524 functional group Chemical group 0.000 description 16
- 239000000463 material Substances 0.000 description 15
- 238000007670 refining Methods 0.000 description 15
- 239000002904 solvent Substances 0.000 description 13
- 239000012608 weak cation exchange resin Substances 0.000 description 13
- 239000012607 strong cation exchange resin Substances 0.000 description 12
- 229920001429 chelating resin Polymers 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 10
- 229910021642 ultra pure water Inorganic materials 0.000 description 10
- 239000012498 ultrapure water Substances 0.000 description 10
- 239000012610 weak anion exchange resin Substances 0.000 description 10
- 239000004698 Polyethylene Substances 0.000 description 9
- -1 and the like Substances 0.000 description 9
- 229920000573 polyethylene Polymers 0.000 description 9
- XLLIQLLCWZCATF-UHFFFAOYSA-N 2-methoxyethyl acetate Chemical compound COCCOC(C)=O XLLIQLLCWZCATF-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 7
- 239000012609 strong anion exchange resin Substances 0.000 description 7
- 239000002202 Polyethylene glycol Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 150000002739 metals Chemical class 0.000 description 6
- 229920011301 perfluoro alkoxyl alkane Polymers 0.000 description 6
- 229920001223 polyethylene glycol Polymers 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 125000000542 sulfonic acid group Chemical group 0.000 description 6
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 6
- 229940023913 cation exchange resins Drugs 0.000 description 5
- 238000011109 contamination Methods 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 229920001780 ECTFE Polymers 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 238000005349 anion exchange Methods 0.000 description 4
- 229920006026 co-polymeric resin Polymers 0.000 description 4
- 239000012776 electronic material Substances 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 229910021645 metal ion Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000005341 cation exchange Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 125000000962 organic group Chemical group 0.000 description 3
- 229920000768 polyamine Polymers 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 208000005156 Dehydration Diseases 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 229920006172 Tetrafluoroethylene propylene Polymers 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 125000002843 carboxylic acid group Chemical group 0.000 description 2
- UUAGAQFQZIEFAH-UHFFFAOYSA-N chlorotrifluoroethylene Chemical group FC(F)=C(F)Cl UUAGAQFQZIEFAH-UHFFFAOYSA-N 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 description 2
- 229920001038 ethylene copolymer Polymers 0.000 description 2
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 2
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical compound FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 229920013653 perfluoroalkoxyethylene Polymers 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 229920013716 polyethylene resin Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000011550 stock solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 125000001302 tertiary amino group Chemical group 0.000 description 2
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 2
- 238000004448 titration Methods 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 1
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- JZTPOMIFAFKKSK-UHFFFAOYSA-N O-phosphonohydroxylamine Chemical group NOP(O)(O)=O JZTPOMIFAFKKSK-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 235000011054 acetic acid Nutrition 0.000 description 1
- WDJHALXBUFZDSR-UHFFFAOYSA-N acetoacetic acid Chemical group CC(=O)CC(O)=O WDJHALXBUFZDSR-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000005251 capillar electrophoresis Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 229940116333 ethyl lactate Drugs 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012458 free base Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 125000000468 ketone group Chemical group 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 235000011007 phosphoric acid Nutrition 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
- 238000012799 strong cation exchange Methods 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 229910021654 trace metal Inorganic materials 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J39/00—Cation exchange; Use of material as cation exchangers; Treatment of material for improving the cation exchange properties
- B01J39/04—Processes using organic exchangers
- B01J39/05—Processes using organic exchangers in the strongly acidic form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J39/00—Cation exchange; Use of material as cation exchangers; Treatment of material for improving the cation exchange properties
- B01J39/04—Processes using organic exchangers
- B01J39/07—Processes using organic exchangers in the weakly acidic form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J39/00—Cation exchange; Use of material as cation exchangers; Treatment of material for improving the cation exchange properties
- B01J39/08—Use of material as cation exchangers; Treatment of material for improving the cation exchange properties
- B01J39/16—Organic material
- B01J39/18—Macromolecular compounds
- B01J39/20—Macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J45/00—Ion-exchange in which a complex or a chelate is formed; Use of material as complex or chelate forming ion-exchangers; Treatment of material for improving the complex or chelate forming ion-exchange properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J47/00—Ion-exchange processes in general; Apparatus therefor
- B01J47/016—Modification or after-treatment of ion-exchangers
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a method and apparatus for producing a dry ion-exchange resin, and a method and apparatus for purifying a liquid to be treated using the dry ion-exchange resin.
- non-aqueous solvents from which impurities have been removed to a high degree, have come to be used as electrolytes for semiconductor manufacturing processes and lithium-ion batteries.
- the dry resin As for the dry resin, a method for purifying a non-aqueous liquid by reducing the moisture content to a predetermined value or less and using it by mixing with ion exchange resins of different ion types, drying the ion exchange resin in a state filled in a cartridge, A refining method involving contact with a non-aqueous liquid has been reported (see Patent Document 4).
- a non-aqueous solvent for dehydration is passed through the packed bed of the granular resin having an ion-exchange group before the dehydration treatment to remove water from the granular resin, and then the non-aqueous solvent to be purified is added to the packed bed of the dehydrated granular resin.
- Patent Document 5 A method of purifying a non-aqueous solvent by passing an aqueous solvent has been reported (see Patent Document 5).
- Patent Document 6 A method of circulating a non-aqueous liquid through zeolite and an ion-exchange resin to reduce water content has been reported (see Patent Document 6).
- An object of the present invention is to provide a method and apparatus for producing a dry ion-exchange resin capable of obtaining a dry ion-exchange resin with reduced water content and metal content, and purification of a liquid to be treated using the dry ion-exchange resin.
- the object is to provide a method and a purification apparatus.
- the present invention is a purification step in which a cation exchange resin to be purified is brought into contact with a mineral acid solution having a metal impurity content of 1 mg/L or less and a concentration of 5% by weight or more to obtain a purified cation exchange resin.
- the purification step wherein the elution amount of all metal impurities eluted when hydrochloric acid having a concentration of 3% by weight is passed through the purification cation exchange resin at a volume ratio of 25 times is 5 ⁇ g / mL-R or less; and a drying step of drying the purified cation exchange resin under reduced pressure at 80° C. or less to a moisture content of 5% by weight or less.
- the contents of sodium (Na), calcium (Ca), magnesium (Mg), and iron (Fe) in the mineral acid solution used in the purification step are each 200 ⁇ g/L or less.
- the method for producing a dry ion-exchange resin may further include a mixing step of mixing the dry cation-exchange resin obtained in the drying step with an anion-exchange resin having a water content of 10% by weight or less.
- the cation exchange resin may have an aminomethyl phosphate group or an iminodiacetic acid group as a chelate group.
- a container having a 24-hour water vapor transmission rate of 8 g/m 2 or less, the interior of which is covered with a non-metallic material in contact with the dry ion-exchange resin obtained by the method for producing a dry ion-exchange resin. can be stored in
- the present invention is a purification means for obtaining a purified cation exchange resin by bringing a cation exchange resin to be purified into contact with a mineral acid solution having a metal impurity content of 1 mg/L or less and a concentration of 5% by weight or more.
- the purification means wherein the amount of all metal impurities eluted when hydrochloric acid having a concentration of 3% by weight is passed through the purification cation exchange resin at 25 times the volume ratio is 5 ⁇ g/mL-R or less; Drying means for drying the purified cation exchange resin under reduced pressure at 80° C. or less to a moisture content of 5% by weight or less.
- the drying means includes a heater installed so as to cover at least a part of the outside of the column containing the purified cation exchange resin, a pump for reducing the pressure in the column, and is preferably provided.
- the drying means preferably includes a drying device that accommodates and heats the purified cation exchange resin, and a pump that reduces the pressure in the drying device.
- the contents of sodium (Na), calcium (Ca), magnesium (Mg), and iron (Fe) in the mineral acid solution used in the refining means are each 200 ⁇ g/L or less.
- the apparatus for producing a dry ion-exchange resin may further include mixing means for mixing the dry cation-exchange resin obtained by the drying means with an anion-exchange resin having a moisture content of 10% by weight or less.
- the cation exchange resin may have an aminomethyl phosphate group or an iminodiacetic acid group as a chelate group.
- the dry ion-exchange resin obtained by the apparatus for producing a dry ion-exchange resin is covered with a non-metallic material for 24 hours, in which the inside that comes into contact with the dry ion-exchange resin is covered with steam. It may be stored in a container having a permeability of 8 g/m 2 or less.
- the present invention is a method for purifying a liquid to be treated, which comprises purifying a liquid to be treated containing ionic impurities and having a water content of 1% by weight or less using the dry ion-exchange resin obtained by the method for producing a dry ion-exchange resin. be.
- the liquid to be treated may be a hydrolyzable solvent.
- the present invention comprises a liquid-to-be-treated purification means for purifying a liquid to be treated containing ionic impurities and having a water content of 1% by weight or less by using the dry ion-exchange resin obtained by the apparatus for producing a dry ion-exchange resin.
- This is a processing liquid purification device.
- the liquid to be treated may be a hydrolyzable solvent.
- a method and apparatus for producing a dry ion-exchange resin capable of obtaining a dry ion-exchange resin with reduced water content and metal content, and a method for purifying a liquid to be treated using the dry ion-exchange resin, and Purification equipment can be provided.
- FIG. 1 is a schematic configuration diagram showing an example of an apparatus for producing a dry ion exchange resin according to an embodiment of the present invention
- FIG. FIG. 2 is a schematic configuration diagram showing another example of a dry ion-exchange resin manufacturing apparatus according to an embodiment of the present invention
- 1 is a schematic configuration diagram showing an example of an apparatus for purifying a liquid to be treated according to an embodiment of the present invention
- FIG. 4 is a graph showing water concentration (ppm) in IPA at the column outlet versus bed volume (BV) (L/LR) in Example 1.
- FIG. 4 is a graph showing water concentration (ppm) in PGMEA at the column outlet versus bed volume (BV) (L/LR) in Example 2.
- the cation-exchange resin to be purified is brought into contact with a mineral acid solution having a metal impurity content of 1 mg/L or less and a concentration of 5% by weight or more for purification. and a drying step of drying the purified cation exchange resin under reduced pressure at 80° C. or less to a moisture content of 5% by weight or less.
- the amount of total metal impurities eluted when 25 times the volume of hydrochloric acid having a concentration of 3% by weight is passed through the purified cation exchange resin obtained in the purification step is , 5 ⁇ g/mL-R or less.
- the present inventors considered purifying the cation exchange resin to be purified by contacting it with a mineral acid solution. Impurities cannot be reduced, and on the contrary, metal impurities in the aqueous mineral acid solution may be adsorbed to the cation exchange resin and increased. As a result, when the cation exchange resin after contact with the mineral acid solution is used to purify the liquid to be treated such as a non-aqueous solvent, a large amount of metal substances and the like are instead eluted into the liquid to be treated. In particular, among metals, sodium (Na), calcium (Ca), magnesium (Mg), and iron (Fe) have a higher content in the cation exchange resin than other metals, and are It is also difficult to reduce the content.
- the resulting purified cation exchange resin is treated with hydrochloric acid having a concentration of 3% by weight.
- the total amount of metal impurities eluted when 25 times the volume ratio is passed through is set to 5 ⁇ g/mL-R or less.
- the purified cation exchange resin is dried under reduced pressure at 80° C. or lower to a moisture content of 5% by weight or lower.
- the conversion of the cation exchange resin to the metal ion form during contact with the mineral acid is suppressed and assured.
- the amount of metal impurities in the cation exchange resin can be effectively reduced, and a purified cation exchange resin with less eluted metal impurities can be obtained.
- the amount of all metal impurities (especially the amount of eluted metals such as Na, Ca, Mg, Fe) eluted when hydrochloric acid with a concentration of 3% by weight is passed through at a volume ratio of 25 times is 5 ⁇ g / mL-R can be:
- the purified cation exchange resin is dried under reduced pressure at 80° C. or lower to a moisture content of 5% by weight or lower.
- Vacuum drying is common and can be performed inexpensively. In drying under reduced pressure, water can be sufficiently removed even by heating at a temperature equal to or lower than the heat-resistant temperature of the cation exchange resin. In the case of chelate resins and weak cation exchange resins, the interaction between functional groups and bound water is weaker than that of strong cation exchange resins and strong anion exchange resins, and thus drying is easy under reduced pressure. On the other hand, strong anion-exchange resins have particularly low heat resistance, and the functional groups of strong cation-exchange resins can be degraded by the heat of drying. have a nature.
- the water content may be reduced to 5% by weight or less, may be reduced to 2% by weight or less, or may be reduced to 1% by weight or less.
- You may The dry chelate resin in Patent Document 3 contains 10 to 97% of the saturated water content, and a chelate resin with a saturated water content of about 60% has a water content of about 6%.
- Cation exchange resins to be purified include strong cation exchange resins, weak cation exchange resins, chelate resins, and the like, and may be at least one of chelate resins and weak cation exchange resins.
- Chelate resins and weak cation exchange resins have a lower affinity for bound water than strong cation exchange resins and strong anion exchange resins, so that functional groups are less likely to be eliminated by drying, resulting in less elution from the resins.
- a chelate resin is a resin that has a functional group that can form a chelate (complex) with metal ions.
- the functional group is not particularly limited as long as it is a functional group capable of forming a chelate (complex) with a metal ion. Examples include cation exchange groups such as diacetic acid groups and thiol groups, and chelate resins having anion exchange groups include anion exchange groups such as polyamine groups.
- the polyamine group is effective not only for removing metal ions, but also for removing impurities with aldehyde and ketone groups in water and non-aqueous liquids, and simplifies the pretreatment process when used in non-aqueous liquids by drying. be able to.
- the chelate resin may have an aminomethyl phosphate group or an iminodiacetic acid group as a chelate group from the viewpoint of selectivity for a plurality of metal species.
- chelate resin for example, Ambersep IRC747UPS (chelate group: aminomethylphosphoric acid group), Ambersep IRC748 (chelate group: iminodiacetic acid group) (both manufactured by DuPont) and the like can be used.
- the chelate resin may be used after being subjected to pretreatment such as regeneration treatment, if necessary.
- H-type chelate resins Orlyte (registered trademark) DS-21 (trade name, manufactured by Organo Co., Ltd.) (chelate group: aminomethyl phosphate group), Orlyte (registered trademark) DS-22 (trade name, Organo Co., Ltd.) (chelate group: iminodiacetic acid group) may also be used.
- the ionic form of Ambersep IRC747UPS and Ambersep IRC748 is based on the Na form, but the ionic form is converted from the Na form to the H form by contacting with a mineral acid solution by the above method.
- Examples of functional groups of weak cation exchange resins include carboxyl groups.
- weak cation exchange resins examples include Amberlite IRC76 (functional group: carboxylic acid group) (manufactured by DuPont) and Amberlite FPC3500 (functional group: carboxylic acid group) (manufactured by DuPont).
- the weak cation exchange resin may be used after pretreatment such as regeneration treatment, if necessary.
- Functional groups of strong cation exchange resins include, for example, sulfonic acid groups.
- strong cation exchange resins examples include Amberlite IR124 (functional group: sulfonic acid group) (manufactured by DuPont), Amberlite 200CT (functional group: sulfonic acid group) (manufactured by DuPont), and Orlite (registered trademark).
- DS-1 trade name, manufactured by Organo Corporation
- DS-4 trade name, manufactured by Organo Corporation
- the strong cation exchange resin may be used after pretreatment such as regeneration treatment, if necessary.
- the mineral acid solution used to purify the cation exchange resin is an inorganic acid solution.
- Mineral acids include, for example, hydrochloric acid, sulfuric acid, nitric acid and the like.
- the solvent that constitutes the solution include water such as pure water (specific resistance: about 10 M ⁇ cm) and ultrapure water (specific resistance: about 18 M ⁇ cm).
- the amount of metal impurities contained in the mineral acid solution used in the refining process is 1 mg/L or less, and the lower the better, it may be 0.5 mg/L or less, or 0.2 mg/L or less. good too. If the amount of metal impurities contained in the mineral acid solution exceeds 1 mg/L, a sufficient effect of reducing the amount of metal impurities in the cation exchange resin cannot be obtained.
- the mineral acid concentration of the mineral acid solution is 5% by weight or more, and may be 10% by weight or more. If the mineral acid concentration of the mineral acid solution is less than 5% by weight, a sufficient effect of reducing the amount of metal impurities in the cation exchange resin cannot be obtained.
- the upper limit of the mineral acid concentration of the mineral acid solution is, for example, 37% by weight.
- the metal impurity is a concept that includes not only metal but also metal impurity ions, and representative examples include sodium (Na), calcium (Ca), magnesium (Mg), iron (Fe), and the like. .
- sodium (Na), calcium (Ca), magnesium (Mg), and iron (Fe) in the cation exchange resin can be reliably and effectively removed. ) can be reduced.
- the temperature of the mineral acid solution that is brought into contact with the cation exchange resin in the purification process is, for example, in the range of 0 to 40°C.
- all metal impurities eluted when hydrochloric acid having a concentration of 3% by weight is passed through the cation exchange resin purified by the above purification step at a volume ratio of 25 times.
- the amount can be 5 ⁇ g/mL-R or less.
- the elution amount of all metal impurities should be as low as possible, and may be 1 ⁇ g/mL-R or less.
- the eluted metal impurities may include at least one of sodium (Na), calcium (Ca), magnesium (Mg), and iron (Fe).
- a washing step may be included in which the purified cation exchange resin contacted with the mineral acid solution is washed with washing water such as pure water or ultrapure water.
- washing water such as pure water or ultrapure water
- the washing water that is brought into contact with the cation exchange resin in the washing process includes pure water, ultrapure water, and the like, and ultrapure water may be used from the viewpoint of preventing contamination after purification.
- the temperature of the washing solution that is brought into contact with the cation exchange resin in the washing step is, for example, in the range of 0 to 30°C.
- the drying temperature in the drying process is 80°C or less, for example, in the range of 40-80°C.
- the drying time in the drying step may be a time during which the moisture content becomes 5% by weight or less.
- the absolute pressure when drying under reduced pressure may be ⁇ 0.05 MPa or less.
- the amount of all metal impurities eluted when hydrochloric acid having a concentration of 3% by weight is passed through a dry ion-exchange resin at a volume ratio of 25 times is, for example, 7 ⁇ g/mL-R or less, and 5 ⁇ g/mL-R or less. There may be.
- metal contamination during vacuum drying since a part (point) of the resin surface, which is usually a sphere, comes into contact with the inside of the dryer, metal contamination derived from the equipment is more likely than in the refining process in which the ion exchange resin column is filled with mineral acid. Few. That is, since metal contamination in the purification step of the cation exchange resin before drying has a greater effect than metal contamination due to drying, it is desirable to control the concentration of metals contained in the purified cation exchange resin before drying.
- dry ion-exchange resin a dry chelate resin, a dry cation-exchange resin, and a dry anion-exchange resin may be combined, or an anion-exchange resin having a water content of 10% by weight or less may be combined, and a water content of 6% by weight or less. may be combined with an anion exchange resin of
- the dry weak anion exchange resin is more suitable for the dry resin because it has higher heat resistance than the strong anion exchange resin. Metals in anionic form can be captured while reducing acid leaching from dry cation exchange resins.
- Weak anion exchange resins are examples of dry anion exchange resins that are mixed with dry chelate resins and dry cation exchange resins.
- the anion exchange groups of the weak anion exchange resin include primary to tertiary amino groups and glucamine groups that selectively react with boron. Chelating resins with polyamine groups are also weak anion exchange resins.
- the dry ion-exchange resin may be stored in a gas barrier container having a 24-hour water vapor permeability of 8 g/m 2 or less, the interior of which is in contact with the dry ion-exchange resin and covered with a non-metallic material. It may be stored in a gas barrier container having a water vapor permeability of 6 g/m 2 or less.
- gas-barrier containers include resin containers such as bags laminated with nylon/polyethylene or the like, and metal containers such as aluminum bags.
- the water vapor permeability is, for example, 15 g/m 2 for polyethylene, 0.1 g/m 2 for aluminum, and 6 g/m 2 for low barrier bags made by AS ONE (https://www.ady-jp.jp/category /1213991.html).
- the water vapor transmission rate can be measured by the method of JIS K7129 (amount of water vapor passing through a test piece of unit area per unit time under predetermined temperature and humidity conditions).
- an inert gas such as nitrogen.
- the method for purifying a liquid to be treated according to the present embodiment uses the dry ion-exchange resin obtained by the method for producing a dry ion-exchange resin described above to purify a liquid to be treated containing metal impurities so that the amount of metal impurities contained is is a method of reducing
- the liquid to be purified is a liquid to be purified by an ion exchange resin, for example, a liquid such as a manufacturing liquid, a semiconductor integrated circuit (IC), a flat panel display (FPD) such as a liquid crystal display (LCD), Electronic parts such as imaging devices (CCD, CMOS), various recording media such as CD-ROM, DVD-ROM, etc. (collectively referred to as electronic industrial products). Electronic materials and the like (including raw materials for electronic materials and solvents for dissolving them, in addition to electronic materials themselves) and the like are included.
- a liquid such as a manufacturing liquid, a semiconductor integrated circuit (IC), a flat panel display (FPD) such as a liquid crystal display (LCD), Electronic parts such as imaging devices (CCD, CMOS), various recording media such as CD-ROM, DVD-ROM, etc.
- Chemical solutions include hydrogen peroxide, hydrochloric acid, sulfuric acid, hydrofluoric acid, phosphoric acid, acetic acid, citric acid, tartaric acid, oxalic acid, lactic acid, malonic acid, tetramethylammonium hydroxide, aqueous ammonium fluoride, and the like. This is because even in the case of purification of an aqueous solution, it is preferable that the fluctuation of the water concentration in the aqueous solution to be treated due to the introduction of resin-containing water should be small.
- Solvents include acetone, 2-butanone, n-butyl acetate, ethanol, methanol, 2-propanol, toluene, xylene, propylene glycol methyl ether acetate, N-methyl-2-pyrrolidinone, ethyl lactate, phenol compounds, dimethyl sulfoxide. , tetrahydrafuran, ⁇ -butyl lactone, polyethylene glycol monomethyl ether (PGME), and polyethylene glycol monomethyl ether acetate (PGMEA).
- PGME polyethylene glycol monomethyl ether
- PMEA polyethylene glycol monomethyl ether acetate
- non-aqueous solvent such as polyethylene glycol monomethyl ether (PGME), polyethylene glycol monomethyl ether acetate (PGMEA), or a mixture thereof.
- PGME polyethylene glycol monomethyl ether
- PMEA polyethylene glycol monomethyl ether acetate
- Electronic materials include semiconductor-related materials (resist, stripping agent, anti-reflection film, interlayer insulating film coating agent, buffer coat coating agent, etc.), flat panel display (FPD) materials (photoresist for liquid crystal, color filter materials, alignment films, sealing materials, liquid crystal mixtures, polarizers, reflectors, overcoat agents, spacers, etc.).
- semiconductor-related materials resist, stripping agent, anti-reflection film, interlayer insulating film coating agent, buffer coat coating agent, etc.
- FPD flat panel display
- non-aqueous liquids in general can be applied, but alcohol, ester-based, or ketone-based organic solvents, especially ester-based organic solvents that are prone to hydrolysis when brought into contact with a cation exchange resin, such as polyethylene.
- a cation exchange resin such as polyethylene.
- the dry chelate resin purified by the method for producing a dry ion exchange resin can be applied.
- the dry chelate resin purified by the method for producing a dry ion exchange resin By using the dry chelate resin purified by the method for producing a dry ion exchange resin, the elution of water from the dry chelate resin is small, and hydrolyzable solvents such as polyethylene glycol monomethyl ether acetate (PGMEA) hardly decompose.
- PGMEA polyethylene glycol monomethyl ether acetate
- FIG. 1 is a schematic configuration diagram showing the overall configuration of this dry ion-exchange resin manufacturing apparatus 1.
- the apparatus 1 for producing dry ion-exchange resin shown in FIG. 1 is an apparatus in which a refining apparatus and a drying apparatus are integrated.
- An ion exchange resin column 10 is provided as purification means for obtaining a purified cation exchange resin.
- the manufacturing apparatus 1 may include a mineral acid solution tank 12 that stores the mineral acid solution, and a waste liquid tank 14 that stores waste liquid and the like.
- the outlet of the mineral acid solution tank 12 and, for example, the upper supply port of the ion-exchange resin column 10 are connected by a pipe 26 via a pump 16, and the outlet of the ion-exchange resin column 10, for example, the lower outlet. and the inlet of the drain tank 14 are connected by a pipe 28 .
- a pH meter 22 may be installed in the pipe 28 as pH measuring means for measuring the pH of the waste liquid.
- a pipe 30 is connected to, for example, an upper wash water supply port of the ion-exchange resin column 10 , and a pipe 32 is connected to, for example, a lower wash water discharge port of the ion-exchange resin column 10 .
- a resistivity meter (conductivity meter) 24 may be installed in the pipe 30 as a resistivity/conductivity measuring means for measuring the resistivity or conductivity of the washing drainage.
- the ion-exchange resin column 10 is configured to have a storage chamber, and the storage chamber is composed of a resin material such as a fluorine-based resin, for example, and has a supply port for supplying the mineral acid solution to the inside and a supply port for discharging the mineral acid solution to the outside. and an outlet for the Inside the storage chamber, a cation exchange resin 36 to be purified is stored and filled on a batten/mesh 40 .
- the ion exchange resin column 10 is configured such that the mineral acid solution supplied from the supply port passes through the cation exchange resin 36 and is discharged to the outside from the discharge port, thereby purifying the cation exchange resin 36. It's like
- the ion-exchange resin column 10 is configured such that the washing water supplied from the washing water supply port passes through the cation exchange resin 36 and is discharged to the outside from the washing wastewater discharge port. cleaning is performed.
- the manufacturing apparatus 1 includes a heater 38 and a vacuum pump 20 as drying means for drying the purified cation exchange resin 36 under reduced pressure at 80°C or less to a moisture content of 5% by weight or less.
- the heater 38 is installed so as to be able to heat the purified cation exchange resin 36 in the ion exchange resin column 10, for example, at least one outside the ion exchange resin column 10 containing the purified cation exchange resin 36.
- the vacuum pump 20 is a pump for reducing the pressure in the ion-exchange resin column 10 , and the suction side of the vacuum pump 20 and the upper suction port of the ion-exchange resin column 10 , for example, are connected by a pipe 34 via a moisture trap 18 . ing.
- a mineral acid solution is stored in the mineral acid solution tank 12 .
- This mineral acid solution contains metal impurities in an amount of 1 mg/L or less and has a concentration of 5% by weight or more.
- the mineral acid solution in the mineral acid solution tank 12 is supplied through the pipe 26 toward the supply port of the ion exchange resin column 10.
- a plurality of pumps 16 may be provided in the piping route according to the flow rate of the mineral acid solution required for purification.
- a mineral acid solution is supplied from the supply port, and the mineral acid solution passes (permeates) the cation exchange resin 36 in a downward flow, for example, and is discharged from the discharge port. are brought into contact with each other for purification (purification step).
- the waste liquid discharged from the discharge port is stored in the waste liquid tank 14 as needed through the pipe 28 .
- the cation exchange resin 36 purified by this purification treatment has a total metal impurity elution amount of 5 ⁇ g/mL- R or less. This makes it possible to obtain a high-quality purified cation exchange resin containing a small amount of metal impurities.
- the cation exchange resin 36 is housed and filled in the storage chamber of the ion exchange resin column 10 used in the manufacturing apparatus 1, and a mineral acid solution is passed through for purification (reduction of contained metal impurities). is performed, the purification treatment may be performed by immersing the cation exchange resin in a mineral acid solution in a pooled state.
- the pH of the waste liquid may be measured by the pH meter 22 installed in the pipe 28. Based on the pH of the waste liquid measured by the pH meter 22, it can be determined whether or not to dispose of the waste liquid as an acid waste liquid.
- the cation exchange resin 36 may be washed with washing water such as ultrapure water.
- washing water is supplied through the pipe 30 toward the washing water supply port of the ion exchange resin column 10 .
- Washing water is supplied from the washing water supply port, and the washing water passes through the cation exchange resin 36 in a downward flow, for example, and is discharged from the washing water discharge port, thereby washing the cation exchange resin 36 to be washed. Washing is performed by contacting water (washing step).
- the ion exchange resin column 10 functions as washing means. Washing water discharged from the washing water outlet is discharged through the pipe 32 .
- a cleaning liquid such as pure water or ultrapure water may be stored in the mineral acid solution tank 12 or in a separate tank, and the cleaning liquid may be supplied from the tank to the ion exchange resin column 10 by a pump or the like.
- the cation exchange resin 36 is stored and filled in the storage chamber of the ion exchange resin column 10 used in the manufacturing apparatus 1, and the cleaning process is performed by allowing the cleaning water to pass through. Washing may be performed by immersing the cation exchange resin in clean water.
- the specific resistance or conductivity of the washing wastewater may be measured by a resistivity meter (conductivity meter) 24 installed in the pipe 32 . Washing with washing water may be performed until the specific resistance or conductivity of the washing liquid measured by the resistivity meter (conductivity meter) 24 becomes less than a predetermined value.
- a TOC meter may be installed as a TOC measuring means to measure the TOC, and washing with washing water may be performed until the TOC is less than a predetermined value set in advance.
- the drying process is performed.
- the vacuum pump 20 is started to reduce the pressure in the storage chamber of the ion exchange resin column 10 to a vacuum state, and the heater 38 heats the purified cation exchange resin 36 at 80° C. or less to a water content of 5% by weight or less. (drying step). This makes it possible to obtain a dry ion exchange resin with reduced water content and reduced metal content.
- Fig. 2 shows another example of a dry ion-exchange resin manufacturing apparatus.
- the apparatus 3 for producing dry ion-exchange resin shown in FIG. 2 is an apparatus in which a refining apparatus and a drying apparatus are separated.
- the apparatus 3 for producing a dry ion-exchange resin in FIG. 2 contacts a cation-exchange resin to be purified with a mineral acid solution having a metal impurity content of 1 mg/L or less and a concentration of 5% by weight or more to purify the resin.
- An ion exchange resin column 10 is provided as purification means for obtaining a purified cation exchange resin.
- the manufacturing apparatus 3 may include a mineral acid solution tank 12 that stores the mineral acid solution and a waste liquid tank 14 that stores waste liquid and the like.
- the outlet of the mineral acid solution tank 12 and, for example, the upper supply port of the ion-exchange resin column 10 are connected by a pipe 26 via a pump 16, and the outlet of the ion-exchange resin column 10, for example, the lower outlet. and the inlet of the drain tank 14 are connected by a pipe 28 .
- a pH meter 22 may be installed in the pipe 28 as pH measuring means for measuring the pH of the waste liquid.
- a pipe 30 is connected to, for example, an upper wash water supply port of the ion-exchange resin column 10 , and a pipe 32 is connected to, for example, a lower wash water discharge port of the ion-exchange resin column 10 .
- a resistivity meter (conductivity meter) 24 may be installed in the pipe 30 as a resistivity/conductivity measuring means for measuring the resistivity or conductivity of the washing drainage.
- the ion-exchange resin column 10 is configured with a storage chamber, and has a supply port for supplying the mineral acid solution inside and a discharge port for discharging it to the outside. Inside the storage chamber, a cation exchange resin 36 to be purified is stored and filled on a batten/mesh 40 .
- the manufacturing device 3 includes a drying device 42 and a vacuum pump 20 as drying means for drying the purified cation exchange resin under reduced pressure at 80°C or less to a moisture content of 5% by weight or less.
- the drying device 42 is a device capable of accommodating and heating the purified cation exchange resin taken out from the ion exchange resin column 10 .
- the drying device 42 may contain, for example, the purified cation exchange resin taken out from the ion exchange resin column 10 and heat it through a heat medium from the outside of the container.
- the vacuum pump 20 is a pump for reducing the pressure in the drying device 42 , and the suction side of the vacuum pump 20 and the upper suction port of the drying device 42 , for example, are connected by a pipe 44 via the moisture trap 18 .
- a mineral acid solution is stored in the mineral acid solution tank 12 .
- This mineral acid solution contains metal impurities in an amount of 1 mg/L or less and has a concentration of 5% by weight or more.
- the mineral acid solution in the mineral acid solution tank 12 is supplied through the pipe 26 toward the supply port of the ion exchange resin column 10 .
- a plurality of pumps 16 may be provided in the piping route according to the flow rate of the mineral acid solution required for purification.
- a mineral acid solution is supplied from the supply port, and the mineral acid solution passes (permeates) the cation exchange resin 36 in a downward flow, for example, and is discharged from the discharge port. are brought into contact with each other for purification (purification step).
- the waste liquid discharged from the discharge port is stored in the waste liquid tank 14 as needed through the pipe 28 .
- the cation exchange resin 36 purified by this purification treatment has a total metal impurity elution amount of 5 ⁇ g/mL- R or less. This makes it possible to obtain a high-quality purified cation exchange resin containing a small amount of metal impurities.
- the cation exchange resin 36 is housed and filled in the storage chamber of the ion exchange resin column 10 used in the manufacturing apparatus 3, and a mineral acid solution is passed through for purification (reduction of contained metal impurities). is performed, the purification treatment may be performed by immersing the cation exchange resin in a mineral acid solution in a pooled state.
- the pH of the waste liquid may be measured by the pH meter 22 installed in the pipe 28. Based on the pH of the waste liquid measured by the pH meter 22, it can be determined whether or not to dispose of the waste liquid as an acid waste liquid.
- the cation exchange resin 36 may be washed with washing water such as ultrapure water.
- washing water is supplied through the pipe 30 toward the washing water supply port of the ion exchange resin column 10 .
- Washing water is supplied from the washing water supply port, and the washing water passes through the cation exchange resin 36 in a downward flow, for example, and is discharged from the washing water discharge port, thereby washing the cation exchange resin 36 to be washed. Washing is performed by contacting water (washing step).
- the ion exchange resin column 10 functions as washing means. Washing water discharged from the washing water outlet is discharged through the pipe 32 .
- a cleaning liquid such as pure water or ultrapure water may be stored in the mineral acid solution tank 12 or in a separate tank, and the cleaning liquid may be supplied from the tank to the ion exchange resin column 10 by a pump or the like.
- the cation exchange resin 36 is stored and filled in the storage chamber of the ion exchange resin column 10 used in the manufacturing apparatus 3, and the cleaning process is performed by allowing the cleaning water to pass through. Washing may be performed by immersing the cation exchange resin in clean water.
- the specific resistance or conductivity of the washing wastewater may be measured by a resistivity meter (conductivity meter) 24 installed in the pipe 32 . Washing with washing water may be performed until the specific resistance or conductivity of the washing liquid measured by the resistivity meter (conductivity meter) 24 becomes less than a predetermined value.
- a TOC meter may be installed as a TOC measuring means to measure the TOC, and washing with washing water may be performed until the TOC is less than a predetermined value set in advance.
- the drying process is performed.
- purified cation exchange resin removed from ion exchange resin column 10 is contained within drying apparatus 42 .
- the vacuum pump 20 is started, the inside of the drying device 42 is decompressed to a vacuum state, and the purified cation exchange resin is dried under reduced pressure at 80° C. or less to a moisture content of 5% by weight or less (drying step). .
- drying step This makes it possible to obtain a dry ion exchange resin with reduced water content and reduced metal content.
- Liquid-contacting parts in the manufacturing apparatuses 1 and 3 that come into contact with the mineral acid solution may be formed or coated with a material that is inert to the mineral acid solution.
- the liquid-contacting part is inert to the mineral acid solution, and the influence of elution of metal impurities from the liquid-contacting part to the cation exchange resin can be reduced.
- Fluorine-based resin, polypropylene resin, polyethylene resin, etc. can be cited as examples of materials that are inert to mineral acid solutions, and are used for wetted parts.
- Fluorinated resins include PTFE (tetrafluoroethylene resin), PFA (tetrafluoroethylene/perfluoroalkoxyethylene copolymer resin), ETFE (tetrafluoroethylene/ethylene copolymer resin), FEP (tetrafluoroethylene propylene hexafluoride copolymer resin), PVDF (vinylidene fluoride resin), ECTFE (ethylene-chlorotrifluoroethylene resin), PCTFEP (chlorotrifluoroethylene resin), PVF (vinyl fluoride resin), and the like.
- FIG. 3 is a schematic configuration diagram showing the overall configuration of the purification apparatus 5 for the liquid to be treated.
- the refining device 5 may include a to-be-processed liquid tank 52 that stores the to-be-processed liquid, and a processing liquid tank 58 that stores the to-be-processed liquid.
- the refining device 5 may further include a pretreatment liquid tank 54 that stores the pretreatment liquid, and a waste liquid tank 56 that stores the waste liquid.
- the outlet of the liquid to be treated tank 52 and the liquid to be treated supply port, for example, the upper part of the ion exchange resin column 50, are connected via a pump 60 by a pipe 66. and the inlet of the processing liquid tank 58 are connected by a pipe 74 .
- the outlet of the pretreatment liquid tank 54 and, for example, the upper pretreatment liquid supply port of the ion-exchange resin column 50 are connected by a pipe 68 via a pump 62, and the ion-exchange resin column 50, for example, the lower drainage outlet. and the inlet of the drain tank 56 are connected by a pipe 70 .
- a pipe 72 is connected to, for example, an upper wash water supply port of the ion-exchange resin column 50 , and a pipe 76 is connected to, for example, a lower wash water discharge port of the ion-exchange resin column 50 .
- a resistivity meter (conductivity meter) 64 may be installed in the pipe 76 as a resistivity/conductivity measuring means for measuring the resistivity or conductivity of the washing drainage.
- the to-be-processed liquid to be purified is stored in the to-be-processed liquid tank 52 .
- the ion-exchange resin column 50 is configured to have a storage chamber, and the storage chamber is composed of a resin material such as a fluorine-based resin, for example, and has a supply port for supplying the liquid to be treated to the inside and an outlet for discharging the liquid to the outside. It has an outlet for Inside the storage chamber, the dried ion exchange resin 78 obtained as described above is stored and filled on top of the batten/mesh 80 .
- the ion-exchange resin column 50 is configured such that the liquid to be treated supplied from the supply port passes through the dry ion-exchange resin 78 and is discharged to the outside from the outlet, thereby purifying the liquid to be treated.
- the dry ion-exchange resin 78 is obtained by the method and apparatus for manufacturing the dry ion-exchange resin described above.
- the amount of elution is set to 5 ⁇ g/mL-R or less, and the amount of metal impurities contained therein is extremely small due to pre-treatment for reducing the amount of metal impurities contained therein.
- the liquid to be treated in the liquid to be treated tank 52 is supplied through the pipe 66 toward the supply port of the ion exchange resin column 50 .
- a plurality of pumps 60 may be provided in the piping route according to the flow rate of the liquid to be treated required for purification.
- the liquid to be treated is supplied from the supply port, and the liquid to be treated passes through the dry ion exchange resin 78 in a downward flow, for example, and is discharged from the discharge port. Refining is performed by contacting the liquid to be treated (to-be-treated liquid purification step).
- a supply port is provided in the lower part of the storage chamber of the ion exchange resin column 50, and the storage chamber is filled with the liquid to be treated or a solution having the same composition as the liquid to be treated, or a solution that can be quickly replaced with the liquid to be treated, in an upward flow.
- the liquid to be purified is brought into contact with the dry ion-exchange resin 78 to be purified by passing through (liquid flow) in a downward flow and being discharged from the discharge port. good.
- the processing liquid discharged from the outlet is stored in the processing liquid tank 58 through the pipe 74 as necessary.
- the treatment liquid before the moisture content reaches the target, the mixed liquid of the pretreatment liquid and the liquid to be treated described below, and the like may be stored in the drainage tank 56 through the pipe 70 as necessary.
- the amount of metal impurities contained in the treatment liquid (for example, the content of each metal element is 1000 ⁇ g/L or less) is reduced to, for example, 10 ⁇ g/L or less.
- the water content of the obtained treatment liquid is, for example, 100 ppm or less.
- an ion-exchange resin column By forming an ion-exchange resin column using a dried ion-exchange resin that has been brought into contact with a mineral acid solution containing an extremely small amount of metal impurities and then dried under reduced pressure to reduce the water content and the amount of internal metal impurities.
- a purification treatment of the liquid to be treated using this ion-exchange resin column treatment for reducing metal impurities contained
- elution of water and metal impurities into the treatment liquid can be reduced.
- the storage chamber of the ion-exchange resin column 50 used in the purification device 5 is filled with the dry ion-exchange resin 78, and the liquid to be treated is allowed to pass through for purification (reduction of contained metal impurities). ) is performed, the purification treatment may be performed by immersing the dry ion exchange resin in the liquid to be treated in a stored state.
- a pretreatment liquid that has a higher affinity for water than the liquid to be treated may be used.
- the pump 62 is driven in the refiner 5 , the pretreatment liquid in the pretreatment liquid tank 54 is supplied through the pipe 68 toward the supply port of the ion exchange resin column 50 .
- the pretreatment liquid is supplied from the supply port, and the pretreatment liquid passes through the dry ion exchange resin 78 in a downward flow, for example, and is discharged from the discharge port. Pretreatment is performed by bringing them into contact (pretreatment step).
- the pretreatment waste liquid discharged from the discharge port is stored in the waste liquid tank 56 as needed through the pipe 70 .
- This pretreatment makes it easier for the liquid to be treated and the dry ion-exchange resin to become more compatible, and makes it easier for ionic impurities to diffuse into the ion-exchange resin.
- a pretreatment liquid that has a higher affinity for water than the liquid to be treated is used to replace the slight amount of water remaining inside the resin with the pretreatment liquid. easier.
- washing water such as ultrapure water, and then washed with mineral acid. etc., to reproduce the H shape.
- washing water is supplied through the pipe 72 toward the washing water supply port of the ion exchange resin column 50 .
- Washing water is supplied from the washing water supply port, and the washing water passes through the dry ion exchange resin 78 in a downward flow, for example, and is discharged from the washing water discharge port. is brought into contact with washing water (washing step).
- the ion exchange resin column 50 functions as washing means. Washing water discharged from the washing water outlet is discharged through a pipe 76 .
- the liquid contacting parts for example, the internal flow path of the pump 60, the inner walls of the pipes 66 and 74, the inner wall of the storage chamber of the ion exchange resin column 50, etc.
- the inside of the processing liquid tank 52 and the processing liquid tank 58, etc. may be formed or coated with a material inert to the liquid to be processed.
- the liquid contact portion is inert to the liquid to be treated, and the influence of elution of metal impurities from the liquid contact portion to the liquid to be treated can be reduced.
- Examples of materials used for wetted parts that are inert to the liquid to be treated include fluorine-based resins, polypropylene resins, and polyethylene resins.
- Fluorinated resins include PTFE (tetrafluoroethylene resin), PFA (tetrafluoroethylene/perfluoroalkoxyethylene copolymer resin), ETFE (tetrafluoroethylene/ethylene copolymer resin), FEP (tetrafluoroethylene propylene hexafluoride copolymer resin), PVDF (vinylidene fluoride resin), ECTFE (ethylene-chlorotrifluoroethylene resin), PCTFEP (chlorotrifluoroethylene resin), PVF (vinyl fluoride resin), and the like.
- the refiner 5 further has filtering means such as a filter for removing impurity fine particles contained in the treated liquid at least one of the front stage and the rear stage of the ion-exchange resin column 50, the Not only eluted metal impurities but also impurity fine particles can be reduced, and a treatment liquid of even higher purity can be obtained.
- the treated liquid treated with the purifier 5 may be further distilled, or the distillate obtained by the distillation may be further treated with the purifier 5 .
- the water content (mass ppm) in the non-aqueous solvent means a value measured by the Karl Fischer method using a Karl Fischer volumetric moisture meter (Aquacounter AQ-2200, manufactured by Hiranuma Sangyo Co., Ltd.). ppm indicates the mass ratio of water to the solution of interest.
- acetic acid concentration (ppm) in PGMEA was measured using a capillary electrophoresis system Agilent 7100 (trade name, manufactured by Agilent Technologies).
- ⁇ Ion exchange resin> The ion exchange resins used are as follows.
- ⁇ DS-4 Macroporous strongly acidic cation exchange resin, manufactured by Organo Co., Ltd.
- Resin material Styrene-divinylbenzene copolymer
- Type of ion exchange group Sulfonic acid group DS-21: Macroporous chelate resin , Organo Co., Ltd.
- resin material styrene-divinylbenzene copolymer, type of ion exchange group: tertiary amino group IRC76: macroporous weak cation exchange resin, manufactured by Organo Co., Ltd. (Amberlite (trademark) series), resin Material: acrylic resin, type of ion exchange group: carboxyl group
- the strong cation exchange resin DS-4 and the strong anion exchange resin DS-2 showed 205 ppm and 332 ppm at 20 BV, respectively, and the water concentration did not decrease to the same level as the stock solution.
- the chelate resin DS-21 which has a weakly acidic cationic group, reduced the water concentration to the same level as the stock solution at 15 BV. It was confirmed that the bound water bonded to the functional group interacts more strongly with the strong cation exchange group and the strong anion exchange group.
- Example 2 Solvent replacement amount of chelate resin and dry chelate resin>
- Chelate resin DS-21 was brought into contact with 5% by weight hydrochloric acid having a metal concentration of 1 mg/L or less as a mineral acid solution to purify the H-form chelate resin, which was used as a wet resin. A portion of this wet resin was dried under reduced pressure at 80° C. for 24 hours or more to obtain a dry chelate resin having a moisture content of 2% by weight or less.
- the water concentration (ppm) in PGMEA at the column outlet was analyzed to confirm the effect of solvent replacement. The results are shown in FIG.
- Example 3 Exchange capacity before and after drying (chelate resin, weak cation exchange resin, weak anion exchange resin), drying under reduced pressure at 80°C>
- chelate resin, weak cation exchange resin, weak anion exchange resin wet resins and dry resins of H-form chelate resin DS-21, H-form chelate resin DS-22, H-form and weak cation exchange resin IRC76, and weak anion exchange resin IRA96SB were obtained.
- the moisture content of the dried resin was 2% or less for the chelate resin and the weak cation exchange resin.
- the moisture content of the weak anion exchange resin was 10% or less.
- the exchange capacities of the resulting wet resin and dry resin were measured.
- the exchange capacity was determined by adding an H-form chelate resin to an aqueous sodium hydroxide solution, immersing it overnight (18 hours) at 25° C., and measuring the OH consumption by titration with that without adding the chelate resin.
- the exchange capacity of the dried resin was measured after immersing the dried product in pure water overnight (18 hours) at 25°C.
- the free base form of IRA96SB was dried as it was under the same conditions as above, and the exchange capacity was calculated by titration. Table 2 shows the results.
- Example 4 Metal content before and after drying of clean chelate resin>
- the H-form chelate resin was purified by contacting it with 5% by weight hydrochloric acid having a metal concentration of 1 mg/L or less.
- ICP-MS Inductively Coupled Plasma Mass Spectrometer, manufactured by Agilent Technologies
- a wet product immediately after purification and its dry product were analyzed for metal content. After the wet resin was placed in a vacuum dryer, the dried product was dried under a pressure of 0 kPa at 80° C. for 24 hours to obtain a dry chelate resin having a water content of 2% by weight or less.
- Table 4 shows the results.
- the dry chelate resin obtained in this test is a dry chelate resin with a high degree of cleanliness.
- Comparative Example 2 Purification of non-aqueous solvent using dry chelate resin> A PFA resin column (inner diameter: 16 mm, height: 30 mm) was packed with 36 mL of the wet chelating resin described in Example 3 (Comparative Example 2) and the dry chelating resin (Example 5).
- the dry chelate resin is 36 mL when immersed in PGMEA, and the dry weight is measured in advance, and the dry resin is slurried with 1 BV of PGMEA (trade name: PM thinner, manufactured by Tokyo Ohka Kogyo Co., Ltd.) and PFA.
- the column was packed.
- the PGMEA simulated liquid prepared in advance was brought into contact from the top of the column.
- a simulated solution was prepared by adding a standard solution for ICP-MS (SPEX) to PGMEA (trade name: PM thinner, manufactured by Tokyo Ohka Kogyo Co., Ltd.). Thereafter, the prepared simulated liquid was brought into contact with the resin at SV5, and the water concentration and metal concentration in PGMEA obtained from the column outlet after 1 hour (BV5) were analyzed. The obtained results were compared with the water concentration and metal concentration in the PGMEA (undiluted solution) before purification, and the water elution concentration and metal removal amount were compared. Table 5 shows the results.
- Example 6 Moisture and acetic acid concentration in PGMEA solution> PGMEA (trade name : PM thinner, manufactured by Tokyo Ohka Kogyo Co., Ltd.) to obtain a resin treatment liquid.
- These resin-treated solutions were stored at room temperature (20 ⁇ 5° C.) for 14 days, and the acetic acid concentration after storage was measured. Table 6 shows the results.
- Examples 7 and 8 Water content and metal elution amount (gas barrier bag, PE bag)> A dry resin of chelate resin DS-21 H type was obtained in the same manner as in Example 2. The water content was 1% by weight.
- a gas barrier container 30 g of the obtained dried resin was filled in a nylon/polyethylene laminated Lamizip LZ-10 (manufactured by Seinichi) (water vapor permeability: 3 to 5 g / m 2 for 24 hours) inside, and a heat sealer was used. After sealing with , it was transferred to an aluminum bag with a humidity of 90% or more, and allowed to stand in a constant temperature bath at 40° C. for 10 days.
- Example 8 A damp towel was placed in the aluminum bag, and the resin-filled container was placed on a table placed on top of the towel so that the towel and the resin-filled container did not come into contact with each other.
- 30 g of the obtained dry resin was filled in a polyethylene (PE) unipack (manufactured by Seinichi), placed in the aluminum bag and stored under the same conditions.
- the resin moisture content was measured after storage for 10 days. It was heated at 105° C. overnight, and the moisture content was calculated from the mass before and after drying. Table 7 shows the results.
- Comparative Example 4 As Comparative Example 4, a dry resin of chelate resin DS-21 H type was obtained in the same manner as in Example 2. The water content was 1% by weight. 30 g of the dried resin was put on a petri dish, left still in an aluminum bag with a humidity of 90% or more in the same manner as in Examples 7 and 8, the aluminum bag was sealed, and left still in a constant temperature bath at 40°C for 10 days. The resin moisture content was measured after storage for 10 days. It was heated at 105° C. overnight, and the moisture content was calculated from the mass before and after drying. Table 7 shows the results.
- Example 7 When stored under conditions of higher temperature and humidity than in a general laboratory, Example 7 showed less moisture increase than Example 8, and the effect of using a gas barrier container was obtained. On the contrary, in Comparative Example 4, which was stored without using a gas barrier container under high humidity conditions, the moisture content increased significantly.
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Abstract
Description
本実施形態に係る乾燥イオン交換樹脂の製造方法は、精製対象のカチオン交換樹脂に、含有金属不純物量が1mg/L以下でかつ濃度が5重量%以上の鉱酸溶液を接触させて精製することによって精製カチオン交換樹脂を得る精製工程と、精製カチオン交換樹脂を、80℃以下で含水率を5重量%以下まで減圧乾燥する乾燥工程と、を含む方法である。本実施形態に係る乾燥イオン交換樹脂の製造方法において、精製工程で得られる精製カチオン交換樹脂に濃度3重量%の塩酸を体積比25倍量で通過させたときに溶出する全金属不純物溶出量は、5μg/mL―R以下である。
本実施形態に係る被処理液の精製方法は、上記乾燥イオン交換樹脂の製造方法で得られた乾燥イオン交換樹脂を使用して、金属不純物を含有する被処理液を精製して含有金属不純物量を低減する方法である。
以下、図面を用いて本実施形態に係る乾燥イオン交換樹脂の製造方法(精製方法)および製造装置(精製装置)について説明する。図1は、この乾燥イオン交換樹脂の製造装置1の全体構成を示す概略構成図である。図1に示す乾燥イオン交換樹脂の製造装置1は、精製装置と乾燥装置とが一体となった装置である。
以下、図面を用いて本実施形態に係る被処理液の精製方法および精製装置について説明する。図3は、この被処理液の精製装置5の全体構成を示す概略構成図である。
[水分濃度の分析]
非水溶媒中の水分量(質量ppm)は、カール・フィッシャー容量法水分計(平沼産業(株)製、Aquacounter AQ-2200)を用いてカール・フィッシャー法により測定した値を意味する。ppmは対象溶液に対する水の質量比を示す。
各金属濃度を、Agilent 8900 トリプル四重極ICP-MS(商品名、アジレント・テクノロジー(株)製)を用いて分析した。
PGMEA中の酢酸濃度(ppm)は、キャピラリ電気泳動システム Agilent 7100(商品名、アジレント・テクノロジー(株)製)を用いて測定した。
用いたイオン交換樹脂は以下の通りである。
・DS-2:ゲル型の強塩基性アニオン交換樹脂、オルガノ株式会社製(オルライト)、樹脂の材質:スチレン-ジビニルベンゼン共重合体、イオン交換基の種類:4級アミン基
・DS-4:マクロポーラス型の強酸性カチオン交換樹脂、オルガノ株式会社製(オルライト)、樹脂の材質:スチレン-ジビニルベンゼン共重合体、イオン交換基の種類:スルホン酸基
・DS-21:マクロポーラス型のキレート樹脂、オルガノ株式会社製(オルライト)、樹脂の材質:スチレン-ジビニルベンゼン共重合体、イオン交換基(キレート基)の種類:アミノリン酸基
・DS-22:マクロポーラス型のキレート樹脂、オルガノ株式会社製(オルライト)、樹脂の材質:スチレン-ジビニルベンゼン共重合体、イオン交換基(キレート基)の種類:イミノジ酢酸基
・IRA96SB:マクロポーラス型の弱アニオン交換樹脂、オルガノ株式会社製(AMBERLITE(商標))、樹脂の材質:スチレン-ジビニルベンゼン共重合体、イオン交換基の種類:3級アミノ基
・IRC76:マクロポーラス型の弱カチオン交換樹脂、オルガノ株式会社製(アンバーライト(商標)シリーズ)、樹脂の材質:アクリル系樹脂、イオン交換基の種類:カルボキシル基
PFAカラムに水湿潤状態のキレート樹脂DS-21、強カチオン交換樹脂DS-4、強アニオン交換樹脂DS-2をそれぞれ50mL充填し、水分濃度30ppmのイソプロピルアルコール(IPA)(トクヤマ製、トクソーIPA SEグレード)をSV=5h-1で供給し、ベットボリューム(BV)(L/L-R)が30となるまで供給を続けた。カラム出口のIPA中の水分濃度(ppm)を分析し、溶媒置換の効果を確認した。結果を表1および図4に示す。
キレート樹脂DS-21に鉱酸溶液として含有金属濃度が1mg/L以下の5重量%塩酸を接触させてH形のキレート樹脂を精製した樹脂を湿潤樹脂とした。この湿潤樹脂の一部を80℃で24時間以上減圧乾燥し、含水率2重量%以下の乾燥キレート樹脂を得た。
実施例2と同じ方法でH形キレート樹脂DS-21、H形キレート樹脂DS-22、H形および弱カチオン交換樹脂IRC76、弱アニオン交換樹脂IRA96SBの湿潤樹脂と乾燥樹脂を得た。乾燥樹脂の含有水分は、キレート樹脂、弱カチオン交換樹脂は2%以下であった。弱アニオン交換樹脂の含有水分は10%以下であった。
実施例3と同様の弱カチオン交換樹脂IRC76と弱アニオン交換樹脂IRA96SBを180℃で18時間乾燥し、得られた乾燥品の交換容量を実施例3と同じ方法で評価した。結果を表3に示す。
含有金属濃度が1mg/L以下の5重量%塩酸を接触させて、H形のキレート樹脂を精製した。精製したキレート樹脂へ濃度3重量%の塩酸を体積比25倍量で通過させたときに溶出する金属不純物溶出量をICP-MS(誘導結合プラズマ質量分析装置、アジレント・テクノロジー製)を用いて測定し、金属含有量を分析した。精製直後の湿潤品と、その乾燥品について金属含有量を分析した。乾燥品は、減圧乾燥器内に湿潤樹脂を静置した後、0kPaの圧力下、80℃、24時間減圧乾燥を行い、含水率2重量%以下の乾燥キレート樹脂を得た。結果を表4に示す。
PFA樹脂製カラム(内径:16mm、高さ:30mm)に、実施例3に記載の湿潤キレート樹脂(比較例2)、および乾燥キレート樹脂(実施例5)を36mL充填した。乾燥キレート樹脂は、PGMEAに浸漬した際に36mLである乾燥重量を予め測定し、乾燥樹脂を1BVのPGMEA(商品名:PMシンナー、東京応化工業(株)製)を用いてスラリー状にしてPFAカラムへ充填した。
樹脂から溶出した水分が、加水分解性溶媒であるPGMEAへ与える影響を確認するため、実施例2に記載の方法で調製した湿潤キレート樹脂である、H形キレート樹脂DS-22へPGMEA(商品名:PMシンナー、東京応化工業(株)製)を接触させ、樹脂処理液を得た。通液初期の水分を0.6重量%含有するPGMEA(比較例3)と、さらに通液を続けて水分溶出量が低減され、水分を0.05重量%含有する樹脂処理PGMEAを得た。これらの樹脂処理液を14日間、室温(20±5℃)で保管し、保管後の酢酸濃度を測定した。結果を表6に示す。
実施例2と同じ方法でキレート樹脂DS-21 H形の乾燥樹脂を得た。含水率は1重量%であった。ガスバリア性容器として、内部が材質:ナイロン/ポリエチレンラミネートのラミジップLZ-10(セイニチ製)(水蒸気透過度:3~5g/m2・24時間)に得られた乾燥樹脂を30g充填し、ヒートシーラーで密閉した後、湿度90%以上のアルミ袋に移し、40℃の恒温槽内で10日間静置した。アルミ袋内には湿らせたタオルを入れ、タオルと樹脂充填容器が接触しないように、樹脂充填容器はタオルの上に設置した台の上に置いた。実施例8として、材質がポリエチレン(PE)のユニパック(セイニチ製)に得られた乾燥樹脂を30g充填し、前記アルミ袋に入れて同条件で保管した。10日間保管後の樹脂含水率を測定した。105℃で1晩加熱し、乾燥前後の質量から含水率を算出した。結果を表7に示す。実施例8に記載のPE容器の正確な水蒸気透過度は不明であるが、PEの水蒸気透過度は15.2g/m2・24時間という文献がある(https://www.ady-jp.jp/category/1213991.html)。
比較例4として、実施例2と同じ方法でキレート樹脂DS-21 H形の乾燥樹脂を得た。含水率は1重量%であった。シャーレに前記乾燥樹脂30gを載せて、実施例7,8と同様に湿度90%以上のアルミ袋内に静置し、アルミ袋を密閉し、40℃の恒温槽内で10日間静置した。10日間保管後の樹脂含水率を測定した。105℃で1晩加熱し、乾燥前後の質量から含水率を算出した。結果を表7に示す。
Claims (10)
- 精製対象のカチオン交換樹脂に、含有金属不純物量が1mg/L以下でかつ濃度が5重量%以上の鉱酸溶液を接触させて精製することによって精製カチオン交換樹脂を得る精製工程であって、前記精製カチオン交換樹脂に濃度3重量%の塩酸を体積比25倍量で通過させたときに溶出する全金属不純物溶出量は、5μg/mL―R以下である、精製工程と、
前記精製カチオン交換樹脂を、80℃以下で含水率を5重量%以下まで減圧乾燥する乾燥工程と、
を含むことを特徴とする乾燥イオン交換樹脂の製造方法。 - 請求項1に記載の乾燥イオン交換樹脂の製造方法であって、
前記精製工程で使用する鉱酸溶液におけるナトリウム(Na)、カルシウム(Ca)、マグネシウム(Mg)、および鉄(Fe)の含有量が、それぞれ200μg/L以下であることを特徴とする乾燥イオン交換樹脂の製造方法。 - 請求項1または2に記載の乾燥イオン交換樹脂の製造方法であって、
前記乾燥工程で得られた乾燥カチオン交換樹脂を、含水率が10重量%以下のアニオン交換樹脂と混合する混合工程をさらに含むことを特徴とする乾燥イオン交換樹脂の製造方法。 - 請求項1~3のいずれか1項に記載の乾燥イオン交換樹脂の製造方法であって、
前記カチオン交換樹脂は、アミノメチルリン酸基またはイミノ二酢酸基をキレート基として有することを特徴とする乾燥イオン交換樹脂の製造方法。 - 請求項1~4のいずれか1項に記載の乾燥イオン交換樹脂の製造方法で得られる乾燥イオン交換樹脂を、前記乾燥イオン交換樹脂と接触する内部が非金属製材料で覆われた、24時間の水蒸気透過度が8g/m2以下の容器に収納することを特徴とする乾燥イオン交換樹脂の製造方法。
- 精製対象のカチオン交換樹脂に、含有金属不純物量が1mg/L以下でかつ濃度が5重量%以上の鉱酸溶液を接触させて精製することによって精製カチオン交換樹脂を得る精製手段であって、前記精製カチオン交換樹脂に濃度3重量%の塩酸を体積比25倍量で通過させたときに溶出する全金属不純物溶出量は、5μg/mL―R以下である、精製手段と、
前記精製カチオン交換樹脂を、80℃以下で含水率を5重量%以下まで減圧乾燥する乾燥手段と、
を備えることを特徴とする乾燥イオン交換樹脂の製造装置。 - 請求項6に記載の乾燥イオン交換樹脂の製造装置であって、
前記乾燥手段は、前記精製カチオン交換樹脂が収納されたカラムの外部の少なくとも一部を覆うように設置されたヒーターと、前記カラム内を減圧するポンプと、を備えることを特徴とする乾燥イオン交換樹脂の製造装置。 - 請求項6に記載の乾燥イオン交換樹脂の製造装置であって、
前記乾燥手段は、前記精製カチオン交換樹脂を収容して加熱する乾燥装置と、前記乾燥装置内を減圧するポンプと、を備えることを特徴とする乾燥イオン交換樹脂の製造装置。 - 請求項1~5のいずれか1項に記載の乾燥イオン交換樹脂の製造方法で得られた乾燥イオン交換樹脂を用いて、イオン性不純物を有する水分濃度1重量%以下の被処理液を精製することを特徴とする被処理液の精製方法。
- 請求項6~8のいずれか1項に記載の乾燥イオン交換樹脂の製造装置で得られた乾燥イオン交換樹脂を用いて、イオン性不純物を有する水分濃度1重量%以下の被処理液を精製する被処理液精製手段を備えることを特徴とする被処理液の精製装置。
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