CN107497463A - A kind of method of preparing methyl ethyl carbonate by ester exchanging reaction - Google Patents
A kind of method of preparing methyl ethyl carbonate by ester exchanging reaction Download PDFInfo
- Publication number
- CN107497463A CN107497463A CN201710593249.1A CN201710593249A CN107497463A CN 107497463 A CN107497463 A CN 107497463A CN 201710593249 A CN201710593249 A CN 201710593249A CN 107497463 A CN107497463 A CN 107497463A
- Authority
- CN
- China
- Prior art keywords
- catalyst
- reaction
- methyl ethyl
- carbonate
- ethyl carbonate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 185
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 62
- 150000002148 esters Chemical class 0.000 title claims abstract description 36
- 239000003054 catalyst Substances 0.000 claims abstract description 142
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 claims abstract description 72
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000000243 solution Substances 0.000 claims abstract description 31
- 239000002253 acid Substances 0.000 claims abstract description 20
- 238000007598 dipping method Methods 0.000 claims abstract description 18
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 11
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 9
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 9
- 229910001960 metal nitrate Inorganic materials 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 239000011148 porous material Substances 0.000 claims description 59
- 239000002131 composite material Substances 0.000 claims description 46
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 40
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 40
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 38
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 36
- 239000002808 molecular sieve Substances 0.000 claims description 35
- 229910002651 NO3 Inorganic materials 0.000 claims description 32
- 229910052681 coesite Inorganic materials 0.000 claims description 30
- 229910052906 cristobalite Inorganic materials 0.000 claims description 30
- 239000000377 silicon dioxide Substances 0.000 claims description 30
- 229910052682 stishovite Inorganic materials 0.000 claims description 30
- 229910052905 tridymite Inorganic materials 0.000 claims description 30
- 238000002360 preparation method Methods 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 239000012670 alkaline solution Substances 0.000 claims description 24
- 239000000969 carrier Substances 0.000 claims description 23
- 229910001868 water Inorganic materials 0.000 claims description 23
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 22
- 239000002994 raw material Substances 0.000 claims description 20
- 239000012018 catalyst precursor Substances 0.000 claims description 17
- 239000000084 colloidal system Substances 0.000 claims description 16
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 15
- 239000001110 calcium chloride Substances 0.000 claims description 15
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 12
- 238000005470 impregnation Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 10
- -1 alkali metal Salt Chemical class 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 9
- 238000002604 ultrasonography Methods 0.000 claims description 9
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000004115 Sodium Silicate Substances 0.000 claims description 8
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 8
- AIYUHDOJVYHVIT-UHFFFAOYSA-M caesium chloride Chemical compound [Cl-].[Cs+] AIYUHDOJVYHVIT-UHFFFAOYSA-M 0.000 claims description 8
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Inorganic materials [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 claims description 8
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 8
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 8
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 6
- 206010013786 Dry skin Diseases 0.000 claims description 5
- 150000001298 alcohols Chemical class 0.000 claims description 5
- 229910052792 caesium Inorganic materials 0.000 claims description 5
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 5
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group 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 4
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 4
- 229910002339 La(NO3)3 Inorganic materials 0.000 claims description 4
- 229910002249 LaCl3 Inorganic materials 0.000 claims description 4
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 4
- 229910052783 alkali metal Inorganic materials 0.000 claims description 4
- SMZOGRDCAXLAAR-UHFFFAOYSA-N aluminium isopropoxide Chemical compound [Al+3].CC(C)[O-].CC(C)[O-].CC(C)[O-] SMZOGRDCAXLAAR-UHFFFAOYSA-N 0.000 claims description 4
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims description 4
- 150000001412 amines Chemical class 0.000 claims description 4
- 229910052788 barium Inorganic materials 0.000 claims description 4
- 229910001626 barium chloride Inorganic materials 0.000 claims description 4
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 claims description 4
- NLSCHDZTHVNDCP-UHFFFAOYSA-N caesium nitrate Inorganic materials [Cs+].[O-][N+]([O-])=O NLSCHDZTHVNDCP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 4
- 238000002425 crystallisation Methods 0.000 claims description 4
- 230000008025 crystallization Effects 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052746 lanthanum Inorganic materials 0.000 claims description 4
- ICAKDTKJOYSXGC-UHFFFAOYSA-K lanthanum(iii) chloride Chemical compound Cl[La](Cl)Cl ICAKDTKJOYSXGC-UHFFFAOYSA-K 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000006116 polymerization reaction Methods 0.000 claims description 4
- 229910052700 potassium Inorganic materials 0.000 claims description 4
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 229910052712 strontium Inorganic materials 0.000 claims description 4
- 229910001631 strontium chloride Inorganic materials 0.000 claims description 4
- AHBGXTDRMVNFER-UHFFFAOYSA-L strontium dichloride Chemical compound [Cl-].[Cl-].[Sr+2] AHBGXTDRMVNFER-UHFFFAOYSA-L 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 3
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 3
- 150000001340 alkali metals Chemical class 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 235000011148 calcium chloride Nutrition 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 239000000470 constituent Substances 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- 238000000967 suction filtration Methods 0.000 claims description 3
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims description 2
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Chemical class CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 claims description 2
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 claims description 2
- 238000010306 acid treatment Methods 0.000 claims description 2
- 238000013019 agitation Methods 0.000 claims description 2
- 239000000908 ammonium hydroxide Substances 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- IWOUKMZUPDVPGQ-UHFFFAOYSA-N barium nitrate Inorganic materials [Ba+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O IWOUKMZUPDVPGQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000002585 base Substances 0.000 claims description 2
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 claims description 2
- 229910001593 boehmite Inorganic materials 0.000 claims description 2
- 239000006229 carbon black Substances 0.000 claims description 2
- 239000008367 deionised water Substances 0.000 claims description 2
- 229910021641 deionized water Inorganic materials 0.000 claims description 2
- 125000004494 ethyl ester group Chemical group 0.000 claims description 2
- 229910001679 gibbsite Inorganic materials 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 2
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 claims description 2
- 238000001802 infusion Methods 0.000 claims description 2
- 238000005342 ion exchange Methods 0.000 claims description 2
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(III) nitrate Inorganic materials [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims description 2
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 2
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 2
- OJURWUUOVGOHJZ-UHFFFAOYSA-N methyl 2-[(2-acetyloxyphenyl)methyl-[2-[(2-acetyloxyphenyl)methyl-(2-methoxy-2-oxoethyl)amino]ethyl]amino]acetate Chemical compound C=1C=CC=C(OC(C)=O)C=1CN(CC(=O)OC)CCN(CC(=O)OC)CC1=CC=CC=C1OC(C)=O OJURWUUOVGOHJZ-UHFFFAOYSA-N 0.000 claims description 2
- 238000013021 overheating Methods 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910000073 phosphorus hydride Inorganic materials 0.000 claims description 2
- 238000006068 polycondensation reaction Methods 0.000 claims description 2
- 235000010333 potassium nitrate Nutrition 0.000 claims description 2
- 235000019353 potassium silicate Nutrition 0.000 claims description 2
- 229910052596 spinel Inorganic materials 0.000 claims description 2
- 239000011029 spinel Substances 0.000 claims description 2
- DHEQXMRUPNDRPG-UHFFFAOYSA-N strontium nitrate Inorganic materials [Sr+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O DHEQXMRUPNDRPG-UHFFFAOYSA-N 0.000 claims description 2
- 239000004094 surface-active agent Substances 0.000 claims description 2
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 238000010792 warming Methods 0.000 claims description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims 11
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims 1
- 239000013078 crystal Substances 0.000 claims 1
- 235000019253 formic acid Nutrition 0.000 claims 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 22
- 239000000047 product Substances 0.000 abstract description 20
- 239000003792 electrolyte Substances 0.000 abstract description 12
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 abstract description 11
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 9
- 230000003197 catalytic effect Effects 0.000 abstract description 9
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 9
- KTUFCUMIWABKDW-UHFFFAOYSA-N oxo(oxolanthaniooxy)lanthanum Chemical compound O=[La]O[La]=O KTUFCUMIWABKDW-UHFFFAOYSA-N 0.000 abstract description 7
- 239000007795 chemical reaction product Substances 0.000 abstract description 5
- 230000002779 inactivation Effects 0.000 abstract description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 3
- 239000003317 industrial substance Substances 0.000 abstract description 2
- 239000012266 salt solution Substances 0.000 abstract 1
- 238000001577 simple distillation Methods 0.000 abstract 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 21
- 230000004044 response Effects 0.000 description 13
- 238000004587 chromatography analysis Methods 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 10
- 239000011777 magnesium Substances 0.000 description 10
- 238000003786 synthesis reaction Methods 0.000 description 10
- 238000005070 sampling Methods 0.000 description 9
- 238000012546 transfer Methods 0.000 description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 239000011575 calcium Substances 0.000 description 6
- 238000006555 catalytic reaction Methods 0.000 description 6
- 229910052593 corundum Inorganic materials 0.000 description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 239000003643 water by type Substances 0.000 description 5
- 239000006227 byproduct Substances 0.000 description 4
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- WKFDWSVVMAKCDI-UHFFFAOYSA-N C(C=1C(C(=O)OCC)=CC=CC1)(=O)OCC.[C] Chemical compound C(C=1C(C(=O)OCC)=CC=CC1)(=O)OCC.[C] WKFDWSVVMAKCDI-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 3
- GEYXPJBPASPPLI-UHFFFAOYSA-N manganese(III) oxide Inorganic materials O=[Mn]O[Mn]=O GEYXPJBPASPPLI-UHFFFAOYSA-N 0.000 description 3
- 230000009257 reactivity Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000002841 Lewis acid Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910020442 SiO2—TiO2 Inorganic materials 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- BYFGZMCJNACEKR-UHFFFAOYSA-N aluminium(i) oxide Chemical compound [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006315 carbonylation Effects 0.000 description 2
- 238000005810 carbonylation reaction Methods 0.000 description 2
- 150000005682 diethyl carbonates Chemical class 0.000 description 2
- 150000005686 dimethyl carbonates Chemical class 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical compound [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 description 2
- 150000007517 lewis acids Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000010189 synthetic method Methods 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 206010054949 Metaplasia Diseases 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 1
- 229910052767 actinium Inorganic materials 0.000 description 1
- QQINRWTZWGJFDB-UHFFFAOYSA-N actinium atom Chemical compound [Ac] QQINRWTZWGJFDB-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- TZPMCTHLTGCIBQ-UHFFFAOYSA-N carbonyl dichloride methyl carbonochloridate Chemical compound COC(=O)Cl.C(=O)(Cl)Cl TZPMCTHLTGCIBQ-UHFFFAOYSA-N 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 239000007805 chemical reaction reactant Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical group 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- GUNDKLAGHABJDI-UHFFFAOYSA-N dimethyl carbonate;methanol Chemical compound OC.COC(=O)OC GUNDKLAGHABJDI-UHFFFAOYSA-N 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- JKGITWJSGDFJKO-UHFFFAOYSA-N ethoxy(trihydroxy)silane Chemical compound CCO[Si](O)(O)O JKGITWJSGDFJKO-UHFFFAOYSA-N 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 150000004675 formic acid derivatives Chemical class 0.000 description 1
- QZQVBEXLDFYHSR-UHFFFAOYSA-N gallium(III) oxide Inorganic materials O=[Ga]O[Ga]=O QZQVBEXLDFYHSR-UHFFFAOYSA-N 0.000 description 1
- 239000002815 homogeneous catalyst Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 230000015689 metaplastic ossification Effects 0.000 description 1
- XMJHPCRAQCTCFT-UHFFFAOYSA-N methyl chloroformate Chemical compound COC(Cl)=O XMJHPCRAQCTCFT-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Inorganic materials O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- UAWABSHMGXMCRK-UHFFFAOYSA-L samarium(ii) iodide Chemical compound I[Sm]I UAWABSHMGXMCRK-UHFFFAOYSA-L 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 231100000004 severe toxicity Toxicity 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 235000013599 spices Nutrition 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/06—Halogens; Compounds thereof
- B01J27/138—Halogens; Compounds thereof with alkaline earth metals, magnesium, beryllium, zinc, cadmium or mercury
-
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
- B01J29/084—Y-type faujasite
-
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/18—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type
-
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
-
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- B01J29/7007—Zeolite Beta
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- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/80—Mixtures of different zeolites
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- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/19—Catalysts containing parts with different compositions
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- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
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Abstract
A kind of method of preparing methyl ethyl carbonate by ester exchanging reaction, it is related to one kind and prepares industrial chemicals method, the present invention loads alkalescence or soda acid amphoteric metal oxide by the way of dipping, mixing salt solution by the use of metal nitrate, the single solution or both of hydrochloride is used as the source of active component, improve the catalytic activity of catalyst, the prepared MgCl of 15%MgO 5%2‑2%La2O3/ H Y are applied to dimethyl carbonate and in diethyl carbonate ester exchange continuous fixed bed reaction or continuous, its catalytic efficiency can reach more than 20g/gh, and when reaction temperature is 200 DEG C, air speed is 30 h‑1When, the h non-inactivations of catalyst successive reaction 5000, diethyl carbonate conversion ratio 69.17% can be kept.Reaction product can obtain disclosure satisfy that the methyl ethyl carbonate product of lithium-ion battery electrolytes purity requirement through simple distillation processing.Catalyst reaction activity is high, and stability is splendid, environmentally friendly pollution-free, noresidue in the product, can repeatedly use.
Description
Technical field
The present invention relates to a kind of method for preparing industrial chemicals, and methyl ethyl carbonate is prepared more particularly to a kind of ester exchange reaction
The method of ester.
Background technology
Methyl ethyl carbonate (ethylmethyl carbonate abbreviation EMC), molecular formula C4H8O3, molecular weight 104.1, nothing
Color transparency liquid, slightly penetrating odor.- 55 DEG C of fusing point, 109 DEG C of boiling point is not soluble in water, is dissolved in the organic solvents such as alcohol, ether, is
A kind of asymmetric carbon acid esters.Due to having the characteristic of dimethyl carbonate, diethyl carbonate, EMC concurrently containing methyl and ethyl simultaneously
It is the solvent of extraordinary spices and intermediate, purposes is quite varied.With the fast development of lithium ion battery industry, relevant battery
The requirements such as security, service life are more and more stricter, and the technological innovation to cell electrolyte industry brings challenge.It is domestic at present
The various electrolyte solvents of synthesis can seldom reach in quality using standard, and electrolyte is and nearest typically from external import
Research finds that methyl ethyl carbonate can be as a kind of electrolyte of lithium ion battery well, and EMC dielectric constants are big, and viscosity is small,
It is strong to lithium salts dissolubility, there is good low temperature performance, EMC is used as the solvent of lithium ion battery electrolyte, can be notable
The ionic conductivity of lithium ion conduction is improved, improves the energy density and discharge capacity of battery, the life of battery can be made,
Security performance topic is high, thus methyl ethyl carbonate electrolyte in lithium-ion battery electrolytes industry by with irreplaceable excellent
Gesture.But purity requirement of the lithium ion battery to electrolyte is very high, the impurity in electrolyte can produce to the chemical property of battery
Raw significant impact, EMC fancy prices and the strict demand to its purity limit its application at home, therefore develop
A kind of low cost, the EMC synthetic methods of high-purity, are the keys that EMC is widely used, and to accomplish to reduce production cost,
Product purity is improved, its key is still to develop a kind of efficient, pollution-free and service life length catalyst.
EMC synthetic method mainly has three kinds at present：Phosgenation, oxidation carbonylation method and ester-interchange method.
Phosgenation is related to ethanol and phosgene reaction, and reaction equation is as follows：
CH3OCOCl + C2H5OH→CH3OCOOC2H5 +HCl……………………………... (1)
Phosgene methylchloroformate is with severe toxicity and intermediate product is with severe corrosive, and byproduct environmental pollution is serious, therefore should
Method has been eliminated.
Oxidation carbonylation method is not perfect at present, and the reaction equation of its Catalysts of Preparing Methyl Ethyl Carbonate is as follows：
CH3OH + C2H5OH + CO + O2→CH3OCOOC2H5 + H2O…………………… (2)
But this method product methyl ethyl carbonate is selectively low, catalyst is expensive and product in contain a variety of carbonic esters and alcohol
The mixture of class, can form azeotropic system, and the separating-purifying of product is difficult.And compared to the above two ester-interchange method carbonate synthesis first and second
Up to the present ester has had Many researchers to do research, technology path is more ripe, and therefore, ester-interchange method is to close at present
The method the most feasible into high-purity ethyl methyl carbonate.
In the research of Synthesis of Ethyl Methyl Carbonate by Transesterification, it is as Material synthesis EMC using DMC and ethanol mainly at present
It is main.But the EMC yields of this kind of method synthesis are low, and reaction product is mixture, contains three kinds of carbonic esters：Carbonic acid diformazan
Ester, diethyl carbonate and methyl ethyl carbonate, and two kinds of alcohol：Methanol and ethanol.So cause there are three pairs of azeotropic in reaction product
Thing：Methanol-Dimethyl Carbonate（The lower 64 DEG C of azeotropic of normal pressure）, ethanol-dimethyl carbonate（The lower 75 DEG C of azeotropic of normal pressure）And ethanol-carbonic acid
Methyl ethyl ester（The lower 79 DEG C of azeotropic of normal pressure）, and if there is alcohols in the application of lithium-ion electrolyte, due to containing in alcohols material
There is reactive hydrogen atom, the compound such as carboxylic acid lithium or alkoxy lithium can be generated during the first charge-discharge of battery, it is this kind of organic
On the one hand thing can cause the unstability of SEI films, reducing the conductibility of lithium ion reduces the cycle efficieny of battery, on the other hand he
The irreversible capacity of battery is increased with the reaction of lithium metal.Industrially the requirement to EMC products is the mg/ of methanol≤0.032
Ml, the mg/ml of ethanol≤0.029, therefore the alcohols removed in product EMC is very necessary, but the presence of these three azeotropic mixtures makes
Separating technology is complicated, and investment and running cost for separation equipment greatly increase.And utilize DMC and diethyl carbonate (DEC)
It is a reversible reaction that reaction, which prepares EMC, pollution-free generation in course of reaction, is most importantly not present in reaction product system
Azeotropic system, thus greatly save the separation costs of product.And the raw material and product of the reaction can serve as lithium electricity
The solvent of pond non-aqueous electrolyte, it is that so-called reaction by-product is not present.DMC and DEC ester exchanges synthesize EMC reaction
Equation is as follows:
H3COCOOCH3+H3CH2COCOOCH2CH3→2H3COCOOCH2CH3…………. (3)
Shen Zhen lands et al. are with MgO, La in document Catal.Lett., 91 (2003) 63-672O3, ZnO and CeO2Deng as catalysis
Agent, wherein being reacted with the best MgO catalyst of catalytic effect under the conditions of normal pressure, 103 DEG C by 4h, it is catalyzed DMC and DEC reactions
EMC is prepared, the yield of obtained methyl ethyl carbonate is only 44.2%.Although the reaction is simple for experimental facilities requirement, bar is reacted
Part is gentle, but the yield that result in due to the limitation of catalyst ability its target product is low, is not suitable for large-scale industry
Metaplasia is produced.
Zhou Gang et al. is with lewis acids such as alchlor, ferric trichloride, titanium tetrachloride, zinc chloride in CN101357889
For catalyst, under the conditions of normal pressure, 150 DEG C, 5h is reacted, DMC and DEC reactions is catalyzed and prepares EMC, EMC yields can reach
55%, and by air-distillation, obtained the EMC of purity more than 99.5%.Although its used catalyst can repeat to recycle,
But due to the lewis acid that its catalyst is chloride type, actually homogeneous catalyst is hygroscopic, difficult separation and recycling, on the other hand
The use of chloride catalyst can cause organochlorine impurity to be mixed into product, and the product band of battery electrolyte level is prepared for its later-period purification
Come difficult.
A kind of method using DMC and DEC as Material synthesis EMC is disclosed in CN1394847A, the catalyst used in it is
The load metal oxide being carried on aluminum oxide, including SnO2/Al2O3, Ga2O3/Al2O3, MoO3Al2O3, ZrO2/Al2O3,
TiO2/Al2O3And V2O5/Al2O, 10h is reacted at normal pressure, 104 DEG C, methyl ethyl carbonate highest yield is only 43.6%, and should
The quality of catalyst accounts for the 8.4% of reaction raw materials gross weight in patent, and catalyst amount is big, product yield is low all limits it in work
Application in industry.
Active component in Japan Patent JP2000281630 using metal oxides such as Lan, Actinium, scandium, yttriums as catalyst is urged
Change DMC and DEC reaction generation EMC, although the repeatable recovery use of this kind of catalyst and not easy in inactivation, it requires salt in raw material
Total content be less than 10ppm, in below 1ppm, the requirement to raw material is very high, such in actual production for the contents of inorganic salts
Ingredient requirement is extremely difficult to.
United States Patent (USP) US5962720 uses SmI2、Li、LiOCH3And CaH2Deng being used as catalyst, reaction is at normal temperatures and pressures
Carry out, reaction needs to can be only achieved balance in more than three days, it can be seen that such catalyst speed is lowly not suitable for industrialization.
Summary refers to low product yield existing for catalyst, catalyst recovery difficulty, pollution products, catalyst amount
Greatly, to the problems such as ingredient requirement is harsh, reaction time is long, handed over we have developed a kind of new catalyst for DMC and DEC esters
Change synthesis EMC reaction.
The content of the invention
It is an object of the invention to provide a kind of method of preparing methyl ethyl carbonate by ester exchanging reaction, the present invention has macropore
With the carrier of microcellular structure, load alkalescence or soda acid amphoteric metal oxide, prepared catalyst have in basic active simultaneously
The heart and L surface acidities center, there is provided another that there is mesoporous and microcellular structure acid carrier, load alkalescence or acid simultaneously
Alkali amphoteric metal oxide, its intermediary hole are used for reaction raw materials rapid mass transfer, and micropore is used to significantly improve carrier specific surface area, increased
The decentralization of big catalyst active center, the loaded catalyst catalysis dimethyl carbonate of said structure and diethyl carbonate synthesis
The methyl ethyl carbonate reaction of high-purity, has high reactivity.
The purpose of the present invention is achieved through the following technical solutions：
A kind of method of preparing methyl ethyl carbonate by ester exchanging reaction, using dimethyl carbonate and diethyl carbonate as raw material, making by oneself
Have and carry out ester exchange in the presence of macropore and micropore or the mesoporous and loaded catalyst of micropore composite pore structural and prepare carbonic acid
The mol ratio of methyl ethyl ester, oxide spinel dimethyl ester and diethyl carbonate is 0.1:1-5:1, react at ambient pressure, reaction temperature 50-
250 DEG C, catalyst amount is the 0.1-3wt % of material quality, and reactive mode is two kinds of continuous fixed bed reaction or continuous and still reaction；
During preparing methyl ethyl carbonate with fixed bed reaction, with mol ratio 0.1:1-5:1 dimethyl carbonate and carbonic acid two
Ethyl ester is raw material, and raw material is pumped into reaction tube using constant flow pump, is 0.1-100 h in air speed-1, normal pressure, reaction temperature 50-
Under conditions of 250 DEG C, continuous sample after collecting reaction after 15-60min is fed, catalyst amount is the 0.1-3wt of material quality
%, preferred reaction conditions are dimethyl carbonate and diethyl carbonate mol ratio 0.5:1-2:1, air speed 20-50 h-1, reaction temperature
150-200 ℃；
During preparing methyl ethyl carbonate with still reaction, with mol ratio 0.1:1-5:1 dimethyl carbonate and carbonic acid diethyl
Ester is raw material, and charging feedstock and catalyst, are placed in heating mantle in three-necked flask, in 25-90 DEG C of agitating and heating backflow 0.5-
10h, catalyst amount are the 0.1-3wt % of material quality, and the mol ratio of preferred feedstock methyl ethyl carbonate and diethyl carbonate is
1:1,90 DEG C of reaction temperature.
A kind of method of described preparing methyl ethyl carbonate by ester exchanging reaction, there is the load of macropore and micro-pore composite structure
The both sexes of type soda acid or base catalyst are that formula is X/YaOb-ZcOdLoad type metal catalyst；Wherein X be comprising Al, Mg,
One or more oxides in the alkalescence such as Ca, La, Fe, Mn, K, Cs, Ba, Sr or soda acid amphoteric metal；Z is in Si, Al, Ti
One or more oxides；A, b, c and d are Y, Z and oxygen respectively relative to atomic fraction；A is 1 or 2, b are 2 or 3, c are 1 or 2,
D is 2 or 3；YaOb-ZcOdTo have the catalyst carrier of macropore and microcellular structure simultaneously, the Z with macroporous structurecOdCarrier system
Preparation Method is as follows：
1）Used ZcOdThe less graininess Z in aperture that usual colloid is produced to obtain for purchase by sol methodcOdUsual glue
Body；
2）By 50 gZ of purchasecOdUsual colloid is placed in the alkaline solution that sodium hydroxide molar concentration is 0.5 mol/L, warp
Cross 90 DEG C of 12 h of heat treatment；
3）The sodium hydroxide lye of residual is washed with deionized water in colloid through Overheating Treatment, is obtained afterwards in 120 DEG C of dry 7 h
To the Z of macroporecOdCarrier.
A kind of method of described preparing methyl ethyl carbonate by ester exchanging reaction, the raw material colloidal solid for preparing macropore carrier can
To be the graininess colloid of various particle size ranges, the particle diameter of colloidal solid can be 0.1~8mm；Described alkaline solution includes
But the hydroxide of alkali metal and ammonium is not limited to, such as the solution of lithium hydroxide, sodium hydroxide, potassium hydroxide and ammonium hydroxide；
The solution of carbonate, bicarbonate, formates and the acetate, such as lithium carbonate, sodium carbonate, potassium carbonate of alkali metal；Alkali used
The medium of property substance solution is preferably water, but is also not necessarily limited to water.The minimum addition of liquid medium will flood all colloids, can
2~10 times for colloidal volume and more than, preferably 2~5 times；The gram molecule percentage of alkaline matter and metal Z in alkaline solution
Than for 1~30%, preferably molar percent 2~15%；The pH value range of alkaline solution can be 8~14；The Z of purchasecOdColloid
Heat treatment temperature in alkaline solution is 60~190 DEG C, preferably 90~120 DEG C；Specific heat treatment temperature depends on being adopted
Alkaline solution and required product.To Z in alkaline solutioncOdThe time that colloid is heat-treated has no particular limits,
Its length is relevant with the concentration of heat treatment temperature used and alkaline substance solution；When heat treatment temperature and/or alkaline matter are molten
When liquid concentration is low, the time of processing needs suitably to extend, conversely, when heat treatment temperature and/or alkaline substance solution concentration are high
When, processing time can suitably shorten；The temperature and alkaline substance solution concentration of heat treatment are higher and processing time is longer, obtain
The Z arrivedcOdAperture is bigger, specific surface area is smaller；Heat treatment time is preferably 1 hour~4 days；Specific use how long may be used
With alkaline solution, heat treatment temperature and the Z of purchase used bycOdColloid products determine；Handled with alkaline solution
ZcOdIn the implementation process of colloidal solid, in order that obtained macropore colloid is more uniform, mechanical agitation or air-flow can be used to stir
Mix.
A kind of method of described preparing methyl ethyl carbonate by ester exchanging reaction, YaOb-ZcOdTo have macropore and micro- simultaneously
The catalyst carrier of pore structure, makes YaObIn the Z of macroporecOdThe Y with microcellular structure is formed in carrieraOb-ZcOdThe preparation of carrier
Method is as follows：
1）Take ZcOdMass fraction 0.1-40% YaObColloidal sol is impregnated into preceding method and is prepared several times in ultrasound environments
Macropore ZcOdIn carrier duct；
2）The catalyst complex carrier presoma obtained after dipping 110 DEG C of dryings 10 hours in an oven；
3）By dry catalyst complex carrier presoma 3h, the Y in roasting process are calcined in Muffle furnace for 550 DEG CaObIt is molten
Polycondensation occurs for micelle, in macropore carrier ZcOdDuct is internally formed microcellular structure, is made while has macropore and a micropore composite holes
The catalyst carrier Y of structureaOb-ZcOd；
Metal X content is the 0.1-50% of vehicle weight in the loaded catalyst formula of composite pore structural, forms microcellular structure
Metal oxide YaObContent is ZcOdThe 0.1-40% of weight.
A kind of method of described preparing methyl ethyl carbonate by ester exchanging reaction, dipping method can use co-impregnation, also may be used
With with the method for step impregnation；Drying temperature can be room temperature~150 DEG C, and the time can be 1 hour~20 days；Sintering temperature can be
150~500 DEG C, the time can be 1~50 hour；The loaded catalyst X/Y of composite pore structuralaOb-ZcOdPreparation equally use
Ultrasonic immersing method：
1）First the Y with composite pore structural being preparedaOb-ZcOdCarrier is put into Muffle furnace 500 DEG C and is calcined 4 hours,
Remove YaOb-ZcOdThe water of middle absorption；
1）Take YaOb-ZcOdThe mixed solution of quality 0.1-50% X metal nitrates and the single solution of chlorate or both,
The Y after roasting is impregnated into ultrasound environments several timesaOb-ZcOdIn carrier duct；
2）Catalyst precursor after dipping 110 DEG C of dryings 10 hours in an oven；
3）Dried catalyst precursor is calcined 3h for 550 DEG C in Muffle furnace, obtains the catalyst with composite pore structural
X/YaOb-ZcOd；Dipping method can use co-impregnation, the method that can also use step impregnation；Drying temperature can be room temperature~
150 DEG C, the time can be 1 hour~20 days；Sintering temperature can be 500~650 DEG C, and the time can be 1~50 hour.
A kind of method of described preparing methyl ethyl carbonate by ester exchanging reaction, there is the supported catalyst of compound pore passage structure
The active constituent presoma of agent is preferably Al (NO3)3、KNO3、CsNO3、Mg(NO3)2、Ca(NO3)2、Ba(NO3)2、Sr(NO3)2、
La(NO3)3、Fe(NO3)3、Mn(NO3)3And AlCl3、KCl、CsCl、MgCl2、CaCl2、BaCl2、SrCl2、LaCl3、FeCl3、
MnCl3Middle one or more of mixing；It is X/H-Z with mesoporous its formula with the loaded catalyst of micropore composite pore structural, its
Middle X is the oxide for including one or more kinds of elements in Al, Mg, K, Cs, Ca, Ba, Sr, La, Fe, Mn；Z is different topology knot
The molecular sieve of structure, the one or more including MOR, MWW, FAU, MFI, FER, BEA etc..
A kind of method of described preparing methyl ethyl carbonate by ester exchanging reaction, the method for preparing methyl ethyl carbonate pass through
Orderly soda acid processing is carried out to the micropore sodium form molecular sieve of different topology structure, then carries out ion exchange with ammonium nitrate, most
High-temperature roasting, which is made, afterwards has the mesoporous and molecular sieve carrier of micropore composite pore structural.The purpose of acid treatment is to remove framework of molecular sieve
In Al, so as to realize pore-creating, it is mesoporous that the main function of alkali process in the Si in framework of molecular sieve is removed forms molecular sieve
Structure, its preparation process comprise the following steps：
1）Dealuminzation：By the micropore sodium form molecular sieve of certain mass different topology structure is added separately to certain volume, concentration is
In 0.11 mol/L acid solution, 6 h then are stirred at reflux in 100 DEG C of oil bath, then by filtering, washing, 120 DEG C of dryings
8h, obtain Na-Z carriers；（Z is the molecular sieve of different topology structure）
2）Desiliconization：Na-Z carriers made from certain mass process 1 are added in the alkaline solution of finite concentration, certain volume,
Then 65 DEG C of min of water bath processing 30, then by filtering, washing, 120 DEG C of dry 8h obtain multi-stage porous Z carriers, are labeled as：Na-
meso-Z；
3）By Na-meso-Z carriers made from process 2 according to solid-to-liquid ratio be 1:100 ratio, it is 1.0 mol/L to be added to concentration
NH4NO3 solution in, 65 DEG C of stirring in water bath 2h, then through suction filtration, washing, 120 DEG C of dry 8h, be finally putting into Muffle furnace
550 DEG C of holding 6h are warming up to 1 DEG C/min, obtain H-meso-Z carriers.
A kind of method of described preparing methyl ethyl carbonate by ester exchanging reaction, the molecular sieve of the different topology structure include
MOR, MWW, FAU, MFI, FER, BEA etc. one or more；The acid solution includes H4EDTA、HCl、HNO3Deng one kind
Or a variety of, preferably H4EDTA；The addition of acid solution will at least flood all molecular sieves, can be the 10- of molecular sieve volume
20 times, preferably 15 times；The alkaline solution includes NaOH, Na2CO3Deng one or more, preferably NaOH；The alkalescence is molten
Liquid concentration is 0.05mol/L-2.0mol/L；The addition of alkaline solution will at least flood all molecular sieves, can be molecular sieve
5-15 times of volume, preferably 10 times；The H-meso-Z carrier mesoporous pore sizes of acquisition are distributed as 4-34nm, specific aperture with it is used
Alkaline solution concentration is relevant；Methyl ethyl carbonate is prepared by the way that the silicon source, silicon source, template of certain mass are mixed, in a constant temperature
Lower crystallization certain time is spent, final high temperature roasting Template removal, so as to directly be prepared with mesoporous and micropore composite holes knot
The molecular sieve carrier of structure；Preparing the silicon source of methyl ethyl carbonate includes sodium metasilicate, sodium metasilicate, waterglass, Ludox, ultra micro
SiO2, White Carbon black, the one or more of tetraethyl orthosilicate and methyl silicate etc., preferably sodium metasilicate, sodium metasilicate, positive silicic acid
Ethyl ester；Source of aluminium includes sodium aluminate, boehmite, gibbsite, aluminum isopropylate, tert-butyl alcohol aluminium and aluminum nitrate etc.
One or more, preferably sodium aluminate, aluminum isopropylate, aluminum nitrate；The template includes organic amine, organic alcohols, acetal
The one or more of class, organic phosphine, surfactant-based and polymerization species etc., preferably organic amine and polymerization species；
The crystallization temperature is 20-180 DEG C, and crystallization time is 15 h-7 days.
A kind of method of described preparing methyl ethyl carbonate by ester exchanging reaction, the methyl ethyl carbonate for preparing have composite holes
The loaded catalyst of structure is prepared using infusion process, and its preparation process comprises the following steps：
1）The H-Z carriers with composite pore structural being prepared are put into Muffle furnace 500 DEG C of roastings 4 hours to remove H-Z
The water of middle absorption；
1）The mixed solution of H-Z mass 0.1-50% X metal nitrates and the single solution of chlorate or both is taken, in ultrasound
It is impregnated into several times in environment in the H-Z carriers duct after roasting；
2）Catalyst precursor after dipping dries 10-12 h at 110-120 DEG C in an oven；
Dried catalyst precursor is calcined 3-5 h in Muffle furnace at 550-650 DEG C, obtained with composite pore structural
Loaded catalyst X/H-Z.
A kind of method of described preparing methyl ethyl carbonate by ester exchanging reaction, the dipping method for preparing methyl ethyl carbonate
Co-impregnation can be used, the method that step impregnation can also be used；Drying temperature can be 25-150 DEG C, and the time can be 1 hour -20
My god；Sintering temperature can be 550-650 DEG C, and the time can be 1-50 hours；Preparing methyl ethyl carbonate has the load of composite pore structural
Metal X content is the 0.1-50% of vehicle weight in type catalyst Formula；There is the work of the loaded catalyst of compound pore passage structure
Property component presoma is preferably Al (NO3) 3, KNO3, CsNO3, Mg (NO3) 2, Ca (NO3) 2, Ba (NO3) 2, Sr (NO3) 2, La
(NO3) 3, Fe (NO3) 3, Mn (NO3) 3 and AlCl3, KCl, CsCl, MgCl2, CaCl2, BaCl2, SrCl2, LaCl3, FeCl3,
One or more of mixing in MnCl3.
Advantages of the present invention is with effect：
The present invention has the carrier of macropore and microcellular structure, load alkalescence or soda acid amphoteric metal oxide, prepared catalysis
Agent has basic active center and L surface acidities center, the loaded catalyst catalysis dimethyl carbonate of said structure simultaneously
Its catalytic efficiency can reach more than 20g/gh with the methyl ethyl carbonate of diethyl carbonate synthesis high-purity.Simultaneously have it is mesoporous and
The acid carrier of microcellular structure, load alkalescence or soda acid amphoteric metal oxide, its intermediary hole are used for reaction raw materials rapid mass transfer,
Micropore is used to significantly improve carrier specific surface area, increases the decentralization of catalyst active center, the supported catalyst of said structure
Agent is catalyzed the methyl ethyl carbonate reaction of dimethyl carbonate and diethyl carbonate synthesis high-purity, has high reactivity, its
Catalytic efficiency can equally reach 20 more than g/gh.
Embodiment
With reference to embodiment, the present invention is described in detail.
The loaded catalyst embodiment of macropore and micropore composite pore structural
Embodiment 1
The Al with composite pore structural being prepared2O3-SiO2The g of carrier 200 is put into Muffle furnace 500 DEG C and is calcined 4 hours
To remove Al2O3-SiO2The water of middle absorption；Take 0.75 mol (192 g) Mg (NO3)2·6H2O, 0.10mol (21.4 g)
MgCl2·6H2O is dissolved in 1000 mL deionized waters, by the mixed solution of the magnesium nitrate of preparation and magnesium chloride in ultrasound environments
The Al being impregnated into several times after roasting2O3-SiO2In carrier duct；Catalyst precursor after dipping is dry in 120 DEG C in an oven
Dry 10 h；Dried catalyst precursor is calcined 4 h in Muffle furnace in 600 DEG C, it is 15 % wt to obtain MgO load capacity,
Magnesium chloride load amount is the 5% wt MgO-5% MgCl of loaded catalyst 15% with composite pore structural2/Al2O3-SiO2。
Carrier is changed to respectively independent macro-pore SiO2With independent aperture SiO2The catalyst of simple carrier can be made.
In fixed bed reactors, it is respectively charged into homemade with independent macro-pore SiO2For carrier, load active component MgO and
MgCl215% MgO-5% MgCl2/SiO2Catalyst（1#）, with independent aperture SiO2For carrier, load active component MgO and
MgCl215% MgO-5% MgCl2/SiO2Catalyst（2#）With with the compound SiO of macropore aperture2-Al2O3For carrier, load is lived
Property component MgO and MgCl215% MgO-5% MgCl2/Al2O3-SiO2Catalyst（3#）Each 50 g, using constant flow pump by carbonic acid
Dimethyl ester is with ethanol according to mol ratio 1:1 ratio is pumped into reactor, is 150 DEG C in reaction temperature, diethyl carbonate matter
Amount air speed is 30h-1Reaction condition under after 500 h of stable reaction, sampling carries out chromatography calculating, as a result as shown in table 1.
According to reaction side's equation, dimethyl carbonate is with diethyl carbonate according to approximate molar ratio 1:1 is reacted, and tests knot
Fruit is basically identical with theory, so being not put into dimethyl carbonate conversion ratio in table 1.When reaction temperature is less than 200 DEG C,
The exclusive product of the reaction is methyl ethyl carbonate.
As it can be seen from table 1 using macro-pore SiO2It is better than for the reaction effect of carrier using aperture SiO2For the anti-of carrier
It is that the reaction is mass transfer limited reaction to answer effect reason, and aperture carrier is unfavorable for reaction mass transfer.But the catalysis of pure macropore
Agent reactivity is but nothing like our homemade compound duct catalyst, and reason is that our homemade compound duct catalyst are same
When there is the carrier of macropore and microcellular structure, wherein macropore carrier is used for reaction raw materials rapid mass transfer, and porous carrier is used for notable
Carrier specific surface area is improved, increases the decentralization of catalyst active center.Carried by our visible homemade catalyst of response data
The pore passage structure of body is highly beneficial to the reaction.
Embodiment 2
The Al with composite pore structural being prepared2O3-SiO2The g of carrier 200 is put into Muffle furnace 500 DEG C and is calcined 4 hours
To remove Al2O3-SiO2The water of middle absorption；Take 0.75 mol (192 g) Mg (NO3)2·6H2O, 0.10mol (21.4 g)
MgCl2·6H2O, 0.025 mol (8.42g) La (NO3)3·H2O is dissolved in 1000 mL deionized waters, by the nitric acid of preparation
The mixed solution of magnesium, magnesium chloride and lanthanum nitrate is impregnated into the Al after roasting several times in ultrasound environments2O3-SiO2Carrier hole
In road；Catalyst precursor after dipping is in an oven in 120 DEG C of dry 10 h；By dried catalyst precursor in Muffle
4 h are calcined in 600 DEG C in stove, it is 15% wt, MgCl to obtain MgO load capacity2Load capacity is 5% wt, La2O3Load capacity is 2% wt
Loaded catalyst 15%MgO-5% MgCl with dynamics model and with composite pore structural2-2%La2O3/Al2O3-SiO2。
In fixed bed reaction pipe, load the above-mentioned homemade g of catalyst 50, using constant flow pump by dimethyl carbonate and carbon
Diethyl phthalate is according to mol ratio 1:1 ratio is pumped into reactor, and diethyl carbonate mass space velocity is 30 h-1, condition of normal pressure,
Temperature is respectively to be reacted at 70 DEG C, 100 DEG C, 130 DEG C, 160 DEG C, 200 DEG C, 250 DEG C, and stablizes 500 h, differential responses temperature
Sampling carries out chromatography calculating after stable, as a result as shown in table 2.
From table 2 it can be seen that with the raising of reaction temperature, diethyl carbonate conversion ratio raises always, in reaction temperature
At 250 DEG C, diethyl carbonate conversion ratio reaches 70.66 %, but when reaction temperature is higher than 200 DEG C, byproduct of reaction is opened
Begin to increase, catalyst stability variation easy in inactivation, it can be seen that with the optimum temperature of the catalyst Catalysts of Preparing Methyl Ethyl Carbonate
For 200 DEG C or so.
Embodiment 3
In fixed bed reaction pipe, it is fitted into embodiment 2 g of catalyst 50 prepared, using constant flow pump by dimethyl carbonate and carbon
Diethyl phthalate is according to mol ratio 1:1 ratio is pumped into reactor, condition of normal pressure, 150 DEG C of temperature, diethyl carbonate quality
Air speed is respectively 15 h-1、20 h-1、30 h-1、50 h-1、70 h-1Lower reaction, charging 500 h of reaction, different quality air speed are steady
Sampling carries out chromatography calculating after fixed, as a result as shown in table 3.
Influence of the reaction velocity of table 3 to diethyl carbonate conversion ratio
From table 3 it can be seen that as the raising of diethyl carbonate mass space velocity, diethyl carbonate conversion ratio are on a declining curve.Matter
The reaction solution of the smaller i.e. unit mass of amount air speed is longer by the residence time of catalytic bed, and catalyst contacts more with reaction raw materials
Fully, reaction generates methyl ethyl carbonate between being more advantageous to raw material.When diethyl carbonate mass space velocity is less than 20 h-1When, carbonic acid
Diethyl ester conversion rate tends towards stability, and reaction reaches balance.
Embodiment 4
In fixed bed reaction pipe, it is fitted into embodiment 2 g of catalyst 50 prepared, using constant flow pump by dimethyl carbonate and carbon
Diethyl phthalate is according to mol ratio 1:1 ratio is pumped into reactor, condition of normal pressure, 150 DEG C of temperature, the h of air speed 30-1Lower reaction,
100 h, 500 h, 1000 h are stablized in charging reaction respectively, are sampled after 2000 h, 5000 h and carry out chromatography calculating, as a result such as
Shown in table 4.
From table 4, it can be seen that with the progress of reaction, diethyl carbonate conversion takes the lead in being held essentially constant after increase, former
Because being that reaction not yet reaches balance in the reaction starting stage, tended to be steady with the reaction that carries out of reaction, from response data
The catalyst is substantially non-deactivated in prolonged course of reaction, and catalyst stability is high.
Embodiment 5
In fixed bed reaction pipe, homemade 10% CaO-7% CaCl are respectively charged into2/Al2O3-SiO2（4#）、30% CaO-7%
CaCl2/Al2O3-SiO2（5#）、50% CaO-7%CaCl2/Al2O3-SiO2（6#）、10%MgO-5% KCl-2% Mn2O3/Al2O3-
SiO2（7#）、10%MgO-3% KCl-2% Mn2O3-2% La2O3/SiO2-SiO2（8#）、30% CaO-7%CaCl2/SiO2-TiO2
（9#）、10%Cs2O-10%AlCl3-7.5%BaO-5%MgO/Al2O3-SiO2（10#）、10%K2O-10%BaCl2-7.5%SrO-5%
MgO/Al2O3-SiO2（11#）Each 50 g of catalyst, using constant flow pump by dimethyl carbonate and diethyl carbonate according to mol ratio 1:
1 ratio is pumped into reactor, condition of normal pressure, 70 DEG C -200 DEG C of temperature range, diethyl carbonate mass space velocity scope 10
h-1—30 h-1Lower reaction, sampling progress chromatography calculating after the h of stable reaction 500 is fed, as a result such as table 5-1 to table 5-8 institutes
Show.
Influence of the table 5-1 differential responses condition to diethyl carbonate conversion ratio
Influence of the table 5-2 differential responses condition to diethyl carbonate conversion ratio
Influence of the table 5-3 differential responses condition to diethyl carbonate conversion ratio
Influence of the table 5-4 differential responses condition to diethyl carbonate conversion ratio
Influence of the table 5-5 differential responses condition to diethyl carbonate conversion ratio
Influence of the table 5-6 differential responses condition to diethyl carbonate conversion ratio
Influence of the table 5-7 differential responses condition to diethyl carbonate conversion ratio
Influence of the table 5-8 differential responses condition to diethyl carbonate conversion ratio
Contrast table 5-1,5-2,5-3 data can be seen that when CaO load capacity is 30 wt%, 30% CaO-7% CaCl2/
Al2O3-SiO2Catalyst effect is best, and catalyst effect reduces afterwards as the increase of CaO load capacity first increases,
When CaO load capacity is 10 wt%, because CaO load capacity is relatively low, CaO is less in the active sites that carrier surface is formed, therefore urges
Agent activity is relatively low.When CaO load capacity is 50 wt%, the cell channels of catalyst are caused to block because CaO load capacity is excessive,
Active sites in partial hole are prevented to cause the conversion ratio of diethyl carbonate to reduce from playing a role.
Contrast table 5-2,5-4,5-5 data can be seen that load active component species get over multi-catalyst catalysis effect
Fruit is better, illustrates synergistic catalyst effect be present between various active component.
The data of contrast table 5-2,5-6 can be seen that 30% CaO-7% CaCl2/Al2O3-SiO2Catalytic effect is better than 30%
CaO-7%CaCl2/SiO2-TiO2。
Contrast table 5-1 to 5-8 data can be seen that 10%Cs2O-10%AlCl3-7.5%BaO-5%MgO/Al2O3-SiO2
For the catalyst of best results, in 200 DEG C of temperature, air speed is 10 h-1When, diethyl carbonate conversion ratio is up to 70.88 %.
Embodiment 6
In three-necked flask, load 45 g dimethyl carbonates and 59 g diethyl carbonates, both mol ratios are 1:1, homemade reality
It is 0.15 g to apply catalyst charge in example 5, is placed in heating mantle, and the h of heating reflux reaction 2 reaches reaction balance at 94 DEG C, takes
Sample carries out chromatography calculating, as a result as shown in table 6.
Influence of the variety classes catalyst to diethyl carbonate conversion ratio in the reaction of the flask of table 6
10%Cs as can be seen from Table 62O-10%AlCl3-7.5%BaO-5%MgO/Al2O3-SiO2Catalyst effect is best,
Diethyl carbonate conversion ratio reaches as high as 60.86 %.Catalyst activity rule meets fixed bed reaction, but because flask is anti-
Closed system is should be, reaction product and reactant mix, and end reaction reaches dynamic equilibrium, the highest of diethyl carbonate
Conversion ratio is difficult to break through 61 %.
Molecular sieve is the mesoporous and micropore composite pore structural loaded catalyst embodiment of carrier
Embodiment 7
The g of H-Y carriers 200 with composite pore structural being prepared is put into Muffle furnace 500 DEG C of roastings 4 hours to remove
The water adsorbed in H-Y；Take 0.75 mol (192 g) Mg (NO3)2·6H2O, 0.10mol (21.4 g) MgCl2·6H2O is molten
In 1000 mL deionized waters, the mixed solution of the magnesium nitrate of preparation and magnesium chloride is impregnated into several times in ultrasound environments
In H-Y carriers duct after roasting；Catalyst precursor after dipping is in an oven in 120 DEG C of dry 10 h；Will be dried
Catalyst precursor is calcined 4 h in Muffle furnace in 600 DEG C, and it is 15 % wt to obtain MgO load capacity, and magnesium chloride load amount is 5%
The wt MgO-5% MgCl of loaded catalyst 15% with composite pore structural2/H-Y。
Catalyst carrier is changed to H-Y, H- β, H-ZSM-5, modenite, H-MCM-48, H- β/MCM-41, micropore respectively
H-Y, using similar preparation method, it can be prepared and activity component load quantity is counted as 20% other loads using MgO completely
Type catalyst.
Catalyst carrier is changed to H-Y, H- β, H-ZSM-5, modenite, H-MCM-48, H- β/MCM-41, micropore respectively
H-Y, using similar preparation method, it can be prepared and activity component load quantity is counted as 20% other loads using MgO completely
Type catalyst.
In fixed bed reactors, each 50 g of catalyst of above-mentioned preparation is respectively charged into, using constant flow pump by carbonic acid diformazan
Ester is with diethyl carbonate according to mol ratio 1:1 ratio is pumped into reactor, and air speed is 30 h-1, normal pressure, reaction temperature 150
DEG C, and stable 500h, sampled after stable and carry out chromatography calculating, as a result as shown in table 7.
As can be seen from Table 7, different catalysts carrier has considerable influence to the reaction, when using H-Y as catalyst carrier,
Reaction effect is best, and diethyl carbonate conversion ratio is 70.14%, thus illustrates that catalyst carrier H-Y pore passage structure is more suitable for
The ester exchange reaction.When using micropore H-Y as carrier, diethyl carbonate conversion ratio is only 10.50%, because the reaction is
Mass transfer limited reaction, and porous carrier is unfavorable for reaction mass transfer, so reaction effect is very poor.Individually use H- β (topological structures
For BEA) molecular sieve when being catalyst carrier, ethanol conversion 59.14%, individually uses H-MCM-48 (topological structure MWW)
When molecular sieve is catalyst carrier, ethanol conversion 40.25%, and use H- β/MCM-41 (topological structure BEA/MWW) multiple
When closing molecular sieve as catalyst carrier, ethanol conversion 61.24%, the molecular sieve that this explanation topological structure is BEA and MWW
Recombination energy plays mutually modified effect, and the pore passage structure of modified composite molecular screen carrier is more beneficial for the ester exchange reaction
Progress.When preparing the loaded catalyst of composite pore structural, preferred catalytic agent carrier is H-Y.
Embodiment 8
（Dealuminzation）Na-Y molecular sieves (Catalyst Factory, Nankai Univ provides, Si/Al 2.6) 268 g of purchase are added to concentration
For 0.11 mol/L 4000 mL H4In EDTA solution, 6 h then are stirred at reflux in 100 DEG C of oil bath, then by filtering, wash
Wash, 120 DEG C of dry 8h, obtain Na-Y molecular sieve carriers.（Desiliconization）It is dense that Na-Y molecular sieves after 34 g dealuminzations are added into 1000 mL
Spend in 0.4 mol/L NaOH solutions, then 65 DEG C of min of water bath processing 30, then by filtering, washing, 120 DEG C of dry 8h are obtained
To multi-stage porous Y carriers, it is labeled as：Na-meso-Y, mesoporous pore size are mainly 15 nm.Na-meso-Y after dealuminzation, desiliconization is carried
Body is 1 according to solid-to-liquid ratio:100 ratio, it is added in the NH4NO3 solution that concentration is 1.0 mol/L, 65 DEG C of stirring in water bath
2h, then by filtering, after washing, 120 DEG C of dry 8h of filtration product are finally putting into Muffle furnace, with 1 DEG C/min speed liters
To 550 DEG C, and 6h is kept, obtain H-meso-Y carriers.0.05 mol/L, 0.2 are changed into respectively by adjusting NaOH concentration
Mol/L, 1.0 mol/L, 2.0 mol/L, it is respectively 4 nm, 11 nm, 25 nm, 34 nm H-meso- that can obtain pore-size distribution
Jie's Y micropore complex carrier.
Using preparation method similar in embodiment 1, respectively using aperture as 4 nm, 11 nm, 15 nm, 25 nm, 34 nm
H-Y as Jie's micropore complex carrier, it is MgO and Cl ions that active component, which can be prepared, counts activearm completely with MgO
Divide load capacity for the different catalyst of 20% carrier aperture.
In fixed bed reactors, each 50 g of catalyst of above-mentioned preparation is respectively charged into, using constant flow pump by carbonic acid diformazan
Ester is with diethyl carbonate according to mol ratio 1:1 ratio is pumped into reactor, and air speed is 30 h-1, normal pressure, reaction temperature 150
DEG C, and stable 500h, sampled after stable and carry out chromatography calculating, as a result as shown in table 8.
As can be seen from Table 8, when using mesoporous pore size for 4 nm H-Y molecular sieves as carrier, diethyl carbonate turns
Rate is only 13.56%, because the reaction is mass transfer limited reaction, and the less carrier of mesoporous pore size is unfavorable for reacting
Mass transfer, therefore reaction effect is poor, with the increase of mesoporous pore size, diethyl carbonate conversion ratio gradually rises.Work as mesoporous pore size
For 34 nm when, diethyl carbonate conversion ratio be 69.78%.
Embodiment 9
The g of H-Y carriers 200 with composite pore structural being prepared is put into Muffle furnace 500 DEG C of roastings 4 hours to remove
The water adsorbed in H-Y；Take 0.75 mol (192 g) Mg (NO3)2·6H2O, 0.10mol (21.4 g) MgCl2·6H2O,
0.025 mol (8.42g) La(NO3)3·H2O is dissolved in 1000 mL deionized waters, by the magnesium nitrate of preparation, magnesium chloride and
The mixed solution of lanthanum nitrate is impregnated into the H-Y carriers duct after roasting several times in ultrasound environments；Catalyst after dipping
Presoma is in an oven in 120 DEG C of dry 10 h；Dried catalyst precursor is calcined 4 h in Muffle furnace in 600 DEG C,
It is 15% wt, MgCl to obtain MgO load capacity2Load capacity is 5% wt, La2O3Load capacity is that 2% wt has dynamics model and had
There are the loaded catalyst 15%MgO-5% MgCl of composite pore structural2-2%La2O3/H-Y。
In fixed bed reactors, load the catalyst 50g of above-mentioned preparation, using constant flow pump by dimethyl carbonate and carbonic acid
Diethylester is according to mol ratio 1:1 ratio is pumped into reactor, and air speed is 30 h-1, normal pressure, temperature be respectively 70 DEG C, 100
DEG C, 130 DEG C, 160 DEG C, react at 200 DEG C and 250 DEG C, and stable 500h, after differential responses temperature stabilization sampling carry out color
Spectrum analysis calculates, as a result as shown in table 9.
As can be seen from Table 9, with the raising of reaction temperature, diethyl carbonate conversion ratio raises always, in reaction temperature
At 250 DEG C, diethyl carbonate conversion ratio reaches 71.26 %, but when reaction temperature is higher than 200 DEG C, byproduct of reaction is opened
Begin to increase, catalyst stability variation easy in inactivation, it can be seen that with the optimum temperature of the catalyst Catalysts of Preparing Methyl Ethyl Carbonate
For 200 DEG C or so.
Embodiment 10
In fixed bed reactors, load the g of catalyst 50 prepared by embodiment 9, using constant flow pump by dimethyl carbonate and carbonic acid
Diethylester is according to mol ratio 1:1 ratio is pumped into reactor, and air speed is respectively 15h-1、20h-1、30 h-1、50 h-1And
70 h-1, normal pressure, reaction temperature is to be reacted at 200 DEG C, and stablizes 500 h, sampling progress chromatography meter after different air speeds are stable
Calculate, diethyl carbonate conversion ratio is as shown in table 10.
Found out by table 10, with the increase of air speed, diethyl carbonate conversion ratio gradually reduces.The smaller i.e. unit of mass space velocity
The reaction solution of quality is longer by the residence time of catalytic bed, and catalyst contacts more abundant with reaction raw materials, is more advantageous to original
Reaction generation methyl ethyl carbonate between material.
Embodiment 11
In fixed bed reactors, load the g of catalyst 50 prepared by embodiment 9, using constant flow pump by dimethyl carbonate and carbonic acid
Diethylester is according to mol ratio 1:1 ratio is pumped into reactor, and air speed is 30 h-1, normal pressure, reaction temperature is anti-at 200 DEG C
Should, sampling progress chromatography calculating after 500 h, 1000h, 2000 h, 5000 h, diethyl carbonate conversion are stablized in reaction respectively
Rate such as table 11.
Influence of the reaction experience duration of table 11 to diethyl carbonate conversion ratio
Gone out by table 11, reaction 5000 h diethyl carbonate conversion ratios of experience are basically unchanged, and catalyst does not inactivate substantially.
Embodiment 12
The g of H-Y carriers 200 with composite pore structural being prepared is put into Muffle furnace 500 DEG C of roastings 4 hours to remove
The water adsorbed in H-Y；Take 0.36 mol (84.3 g) Ca (NO3)2·4H2O, 0.054mol (7.9 g) CaCl2·2H2O,
It is dissolved in 1000 mL deionized waters, the mixed solution of the calcium nitrate of preparation and calcium chloride is impregnated several times in ultrasound environments
In H-Y carriers duct after to roasting；Catalyst precursor after dipping is in an oven in 120 DEG C of dry 10 h；After drying
Catalyst precursor in Muffle furnace in 600 DEG C be calcined 4 h, it is 10% wt, CaCl to obtain CaO load capacity2Load capacity is 3%
The wt CaO-3% CaCl of loaded catalyst 10% with dynamics model and with composite pore structural2/H-Y（1#）.
Take 0.72 mol (169 g) Ca (NO3)2·4H2O, 0.054mol (7.9 g) CaCl2·2H2O, using similar
Preparation method, it is 20% wt, CaCl that CaO load capacity, which can be prepared,2Load capacity has dynamics model simultaneously for 3% wt's
The CaO-3%CaCl of loaded catalyst 20% with composite pore structural2/H-Y（2#）.
Take 1.08 mol (253 g) Ca (NO3)2·4H2O, 0.054mol (7.9 g) CaCl2·2H2O, using similar
Preparation method, it is 30% wt, CaCl that CaO load capacity, which can be prepared,2Load capacity has dynamics model simultaneously for 3% wt's
The CaO-3%CaCl of loaded catalyst 30% with composite pore structural2/H-Y（3#）.
Take 0.75 mol (192 g) Mg (NO3)2·6H2O, 0.10mol (21.4 g) MgCl2·6H2O, 0.025
mol (8.42g) La(NO3)3·H2O, using similar preparation method, it is 15% wt that MgO load capacity, which can be prepared,
MgCl2Load capacity is 5% wt, La2O3Load capacity is the 2% wt support type with dynamics model and with composite pore structural
Catalyst 15%MgO-5% MgCl2-2% La2O3/H-Y（4#）.
Take 0.50 mol (128 g) Mg (NO3)2·6H2O, 0.08 mol (6 g) KCl, 0.03 mol (9.39 g)
Mn(NO3)3·4H2O, using similar preparation method, it is 10% wt that MgO load capacity, which can be prepared, and KCl load capacity is 3%
Wt, Mn2O3Load capacity is the 2% wt loaded catalyst 10%MgO-5% with dynamics model and with composite pore structural
KCl-2% Mn2O3/H-Y（5#）.
In fixed bed reactors, each 50 g of catalyst of above-mentioned preparation is respectively charged into, using constant flow pump by carbonic acid diformazan
Ester is with diethyl carbonate according to mol ratio 1:1 ratio is pumped into reactor, respectively at differential responses temperature and different skies
Reacted under speed, and stable 500h, sampling progress chromatography calculating after different catalysts are stable, diethyl carbonate conversion ratio difference
As shown in table 12- tables 16.
Contrast table 12, table 13, table 14 can be seen that catalyst effect and reduce afterwards as the increase of CaO load capacity first increases,
When CaO load capacity is 20 wt%, 20% CaO-3%CaCl2/ H-Y catalyst effects are best, when CaO load capacity is 10
During wt%, because CaO load capacity is relatively low, CaO is less in the active sites that carrier surface is formed, therefore catalyst activity is relatively low.When
When CaO load capacity is 30 wt%, cause the cell channels of catalyst to block because CaO load capacity is excessive, make active in partial hole
Position can not play a role and cause feed stock conversion to reduce.
Contrast table 12- tables 16 are as can be seen that use 15%MgO-5% MgCl2-2% La2O3When/H-Y is catalyst, reaction
Effect is best, is 200 DEG C in reaction temperature, normal pressure, air speed is 30 h-1When, diethyl carbonate conversion ratio is 69.17%.Therefore,
When carrying out the ester exchange reaction, preferred catalyst is 15%MgO-5% MgCl2-2% La2O3/H-Y。
Embodiment 13
In three-necked flask, load 45 g dimethyl carbonates, 59 g diethyl carbonates are different types of in 0.2g embodiments 6 to urge
Agent, it is placed in heating mantle, the h of heating reflux reaction 2 reaches reaction balance at 90 DEG C, and sampling carries out chromatography calculating,
Diethyl carbonate conversion ratio is as shown in table 17.
As can be seen from Table 17,15%MgO-5% MgCl2-2% La2O3/ H-Y catalyst（4#）Catalytic effect is best, carbonic acid
Diethyl ester conversion rate is 60.47%.
It is described above, only it is several embodiments of the application, any type of limitation is not done to the application, although this Shen
Please with preferred embodiment disclose as above, but and be not used to limit the application, any person skilled in the art, do not taking off
In the range of technical scheme, make a little variation using the technology contents of the disclosure above or modification is equal to
Case study on implementation is imitated, is belonged in the range of technical scheme.
Claims (10)
- A kind of 1. method of preparing methyl ethyl carbonate by ester exchanging reaction, it is characterised in that with dimethyl carbonate and diethyl carbonate For raw material, it is homemade have carry out ester in the presence of macropore and micropore or the mesoporous and loaded catalyst of micropore composite pore structural For exchange system for methyl ethyl carbonate, the mol ratio of oxide spinel dimethyl ester and diethyl carbonate is 0.1:1-5:1, at ambient pressure instead Should, 50-250 DEG C of reaction temperature, catalyst amount is the 0.1-3wt % of material quality, and reactive mode is continuous fixed bed reaction or continuous With two kinds of still reaction；During preparing methyl ethyl carbonate with fixed bed reaction, with mol ratio 0.1:1-5:1 dimethyl carbonate and carbonic acid two Ethyl ester is raw material, and raw material is pumped into reaction tube using constant flow pump, is 0.1-100 h in air speed-1, normal pressure, reaction temperature 50- Under conditions of 250 DEG C, continuous sample after collecting reaction after 15-60min is fed, catalyst amount is the 0.1-3wt of material quality %, preferred reaction conditions are dimethyl carbonate and diethyl carbonate mol ratio 0.5:1-2:1, air speed 20-50 h-1, reaction temperature 150-200 ℃；During preparing methyl ethyl carbonate with still reaction, with mol ratio 0.1:1-5:1 dimethyl carbonate and carbonic acid diethyl Ester is raw material, and charging feedstock and catalyst, are placed in heating mantle in three-necked flask, in 25-90 DEG C of agitating and heating backflow 0.5- 10h, catalyst amount are the 0.1-3wt % of material quality, and the mol ratio of preferred feedstock methyl ethyl carbonate and diethyl carbonate is 1:1,90 DEG C of reaction temperature.
- 2. the method for a kind of preparing methyl ethyl carbonate by ester exchanging reaction according to claim 1, it is characterised in that have big Hole and the support type soda acid both sexes of micro-pore composite structure or base catalyst are that formula is X/YaOb-ZcOdLoad type metal urge Agent；Wherein X is comprising one kind or more in the alkalescence such as Al, Mg, Ca, La, Fe, Mn, K, Cs, Ba, Sr or soda acid amphoteric metal Kind oxide；Z is one or more oxides in Si, Al, Ti；A, b, c and d are Y, Z and oxygen respectively relative to atomic fraction；a For 1 or 2, b are 2 or 3, c are 1 or 2, d are 2 or 3；YaOb-ZcOdTo have the catalyst carrier of macropore and microcellular structure simultaneously, Z with macroporous structurecOdSupport preparation method is as follows：Used ZcOdThe less graininess Z in aperture that usual colloid is produced to obtain for purchase by sol methodcOdUsual colloid；By 50 gZ of purchasecOdUsual colloid is placed in the alkaline solution that sodium hydroxide molar concentration is 0.5 mol/L, by 90 DEG C heat treatment 12 h；The sodium hydroxide lye of residual is washed with deionized water in colloid through Overheating Treatment, is obtained afterwards in 120 DEG C of dry 7 h The Z of macroporecOdCarrier.
- 3. the method for a kind of preparing methyl ethyl carbonate by ester exchanging reaction according to claim 2, it is characterised in that prepare big The particle diameter of the raw material colloidal solid of hole carrier is 0.1~8mm；Alkaline solution includes but is not limited to the hydroxide of alkali metal and ammonium Thing, such as the solution of lithium hydroxide, sodium hydroxide, potassium hydroxide and ammonium hydroxide；Carbonate, bicarbonate, the formic acid of alkali metal Salt and acetate, as lithium carbonate, sodium carbonate, potassium carbonate solution；The medium of alkaline substance solution used is preferably water, but unlimited Yu Shui；The minimum addition of liquid medium will flood all colloids, be 2~10 times of colloidal volume and more than, preferably 2~5 Times；Alkaline matter in alkaline solution and metal Z molar percent are 1~30%, preferably molar percent 2~ 15%；The pH value range of alkaline solution is 8~14；The Z of purchasecOdHeat treatment temperature of the colloid in alkaline solution is 60~190 DEG C, preferably 90~120 DEG C；Specific heat treatment temperature depends on used alkaline solution and required product；Alkaline solution In to ZcOdThe time that colloid is heat-treated has no particular limits, its length and heat treatment temperature used and alkaline matter The concentration of solution is relevant；When heat treatment temperature and/or low alkaline substance solution concentration, the time of processing needs suitably to prolong Long, conversely, when heat treatment temperature and/or high alkaline substance solution concentration, processing time can suitably shorten；The temperature of heat treatment It is higher and processing time is longer, obtained Z with alkaline substance solution concentrationcOdAperture is bigger, specific surface area is smaller；Heat treatment Time is preferably 1 hour~4 days；Z is handled with alkaline solutioncOdIn the implementation process of colloidal solid, in order that obtained large-pore gel Body is more uniform, using mechanical agitation or airflow stirring.
- A kind of 4. method of preparing methyl ethyl carbonate by ester exchanging reaction according to claim 1, it is characterised in that YaOb- ZcOdTo have the catalyst carrier of macropore and microcellular structure simultaneously, make YaObIn the Z of macroporecOdBeing formed in carrier has micropore knot The Y of structureaOb-ZcOdThe preparation method of carrier is as follows：Take ZcOdMass fraction 0.1-40% YaObColloidal sol be impregnated into several times in ultrasound environments preceding method be prepared it is big Hole ZcOdIn carrier duct；The catalyst complex carrier presoma obtained after dipping 110 DEG C of dryings 10 hours in an oven；By dry catalyst complex carrier presoma 3h, the Y in roasting process are calcined in Muffle furnace for 550 DEG CaObColloidal sol Polycondensation occurs for particle, in macropore carrier ZcOdDuct is internally formed microcellular structure, is made while has macropore and a micropore composite holes knot The catalyst carrier Y of structureaOb-ZcOd；Metal X content is the 0.1-50% of vehicle weight in the loaded catalyst formula of composite pore structural, forms microcellular structure Metal oxide YaObContent is ZcOdThe 0.1-40% of weight.
- A kind of 5. method of preparing methyl ethyl carbonate by ester exchanging reaction according to claim 1, it is characterised in that dipping side Method co-impregnation, or the method with step impregnation；Drying temperature can be room temperature~150 DEG C, and the time can be 1 hour~20 days； Sintering temperature can be 150~500 DEG C, and the time can be 1~50 hour；The loaded catalyst X/Y of composite pore structuralaOb-ZcOd's Preparation equally uses ultrasonic immersing method：First the Y with composite pore structural being preparedaOb-ZcOdCarrier is put into Muffle furnace 500 DEG C and is calcined 4 hours, removes Remove YaOb-ZcOdThe water of middle absorption；Take YaOb-ZcOdThe mixed solution of quality 0.1-50% X metal nitrates and the single solution of chlorate or both, super The Y after roasting is impregnated into acoustic environment several timesaOb-ZcOdIn carrier duct；Catalyst precursor after dipping 110 DEG C of dryings 10 hours in an oven；Dried catalyst precursor is calcined 3h for 550 DEG C in Muffle furnace, obtains the catalyst X/ with composite pore structural YaOb-ZcOd；Dipping method co-impregnation, or the method with step impregnation；Drying temperature can be room temperature~150 DEG C, and the time can For 1 hour~20 days；Sintering temperature is 500~650 DEG C, and the time is 1~50 hour.
- 6. the method for a kind of preparing methyl ethyl carbonate by ester exchanging reaction according to claim 1, it is characterised in that have multiple The active constituent presoma for closing the loaded catalyst of pore passage structure is preferably Al (NO3)3、KNO3、CsNO3、Mg(NO3)2、Ca (NO3)2、Ba(NO3)2、Sr(NO3)2、La(NO3)3、Fe(NO3)3、Mn(NO3)3And AlCl3、KCl、CsCl、MgCl2、CaCl2、 BaCl2、SrCl2、LaCl3、FeCl3、MnCl3Middle one or more of mixing；With mesoporous and micropore composite pore structural support type Its formula of catalyst is X/H-Z, and wherein X is to include one or more kinds of elements in Al, Mg, K, Cs, Ca, Ba, Sr, La, Fe, Mn Oxide；Z is the molecular sieve of different topology structure, includes MOR, MWW, FAU, MFI, FER, BEA one or more.
- A kind of 7. method of preparing methyl ethyl carbonate by ester exchanging reaction according to claim 1, it is characterised in that the system Standby methyl ethyl carbonate is handled by carrying out orderly soda acid to the micropore sodium form molecular sieve of different topology structure, then with ammonium nitrate Ion exchange is carried out, final high temperature roasting, which is made, has the mesoporous and molecular sieve carrier of micropore composite pore structural；Acid treatment purpose It is to remove the Al in framework of molecular sieve, so as to realize pore-creating, the main function of alkali process is in the Si in framework of molecular sieve is removed Molecular sieve is set to form meso-hole structure, its preparation process comprises the following steps：1）Dealuminzation：The micropore sodium form molecular sieve of different topology structure is added separately to the acid solution that concentration is 0.11 mol/L In, 6 h then are stirred at reflux in 100 DEG C of oil bath, then by filtering, washing, 120 DEG C of dry 8h, obtain Na-Z carriers；（Z is not The molecular sieve of homeomorphism structure）2）Desiliconization：Na-Z carriers made from process 1 are added in alkaline solution, then 65 DEG C of min of water bath processing 30, then pass through Suction filtration is crossed, is washed, 120 DEG C of dry 8h obtain multi-stage porous Z carriers, are labeled as：Na-meso-Z；3）By Na-meso-Z carriers made from process 2 according to solid-to-liquid ratio be 1:100 ratio, it is 1.0 mol/L to be added to concentration NH4NO3 solution in, 65 DEG C of stirring in water bath 2h, then through suction filtration, washing, 120 DEG C of dry 8h, be finally putting into Muffle furnace 550 DEG C of holding 6h are warming up to 1 DEG C/min, obtain H-meso-Z carriers.
- A kind of 8. method of preparing methyl ethyl carbonate by ester exchanging reaction according to claim 1, it is characterised in that it is described not The molecular sieve of homeomorphism structure includes MOR, MWW, FAU, MFI, FER, BEA one or more；Acid solution includes H4EDTA、 HCl、HNO3One or more, preferably H4EDTA；The addition of acid solution will at least flood all molecular sieves, be molecule 10-20 times, preferably 15 times of sieve nest product；Alkaline solution includes NaOH, Na2CO3One or more, preferably NaOH；Alkalescence is molten Liquid concentration is 0.05mol/L-2.0mol/L；The addition of alkaline solution will at least flood all molecular sieves, be molecular sieve Long-pending 5-15 times, preferably 10 times；The H-meso-Z carrier mesoporous pore sizes of acquisition are distributed as 4-34nm；Methyl ethyl carbonate is prepared to lead to Cross silicon source, silicon source, template mix-crystal, final high temperature roasting Template removal, so as to directly be prepared with mesoporous and micro- The molecular sieve carrier of hole composite pore structural；The silicon source for preparing methyl ethyl carbonate is molten including sodium metasilicate, sodium metasilicate, waterglass, silicon Glue, ultra micro SiO2, White Carbon black, the one or more of tetraethyl orthosilicate and methyl silicate, preferably sodium metasilicate, sodium metasilicate, Tetraethyl orthosilicate；Silicon source includes sodium aluminate, boehmite, gibbsite, aluminum isopropylate, tert-butyl alcohol aluminium and aluminum nitrate One or more, preferably sodium aluminate, aluminum isopropylate, aluminum nitrate；The template includes organic amine, organic alcohols, acetal Class, organic phosphine, preferably surfactant-based and polymerization species one or more, organic amine and polymerization species；It is brilliant It is 20-180 DEG C to change temperature, and crystallization time is 15 h-7 days.
- A kind of 9. method of preparing methyl ethyl carbonate by ester exchanging reaction according to claim 1, it is characterised in that the system The loaded catalyst that standby methyl ethyl carbonate has composite pore structural is prepared using infusion process, and its preparation process includes following step Suddenly：1）The H-Z carriers with composite pore structural being prepared are put into Muffle furnace 500 DEG C of roastings 4 hours to remove H-Z The water of middle absorption；The mixed solution of H-Z mass 0.1-50% X metal nitrates and the single solution of chlorate or both is taken, in ultrasonic ring It is impregnated into several times in border in the H-Z carriers duct after roasting；Catalyst precursor after dipping dries 10-12 h at 110-120 DEG C in an oven；Dried catalyst precursor is calcined 3-5 h in Muffle furnace at 550-650 DEG C, obtained with composite pore structural Loaded catalyst X/H-Z.
- 10. the method for a kind of preparing methyl ethyl carbonate by ester exchanging reaction according to claim 1, it is characterised in that described Prepare the dipping method co-impregnation of methyl ethyl carbonate, or the method with step impregnation；Drying temperature can be 25-150 DEG C, when Between can be -20 days 1 hour；Sintering temperature is 550-650 DEG C, and the time is 1-50 hours；Preparing methyl ethyl carbonate has composite holes Metal X content is the 0.1-50% of vehicle weight in the loaded catalyst formula of structure；There is the support type of compound pore passage structure The active constituent presoma of catalyst is preferably Al (NO3) 3, KNO3, CsNO3, Mg (NO3) 2, Ca (NO3) 2, Ba (NO3) 2, Sr (NO3) 2, La (NO3) 3, Fe (NO3) 3, Mn (NO3) 3 and AlCl3, KCl, CsCl, MgCl2, CaCl2, BaCl2, SrCl2, One or more of mixing in LaCl3, FeCl3, MnCl3.
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| CN112724017A (en) * | 2021-01-14 | 2021-04-30 | 吉林师范大学 | Method for synthesizing asymmetric organic carbonate at room temperature |
| CN117205911A (en) * | 2023-11-09 | 2023-12-12 | 南京大学扬州化学化工研究院 | Supported heterogeneous transesterification catalyst and preparation method and application thereof |
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