WO2021259347A1 - ZSM-5/β核壳型分子筛及其合成和应用 - Google Patents
ZSM-5/β核壳型分子筛及其合成和应用 Download PDFInfo
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- WO2021259347A1 WO2021259347A1 PCT/CN2021/101993 CN2021101993W WO2021259347A1 WO 2021259347 A1 WO2021259347 A1 WO 2021259347A1 CN 2021101993 W CN2021101993 W CN 2021101993W WO 2021259347 A1 WO2021259347 A1 WO 2021259347A1
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- 239000002808 molecular sieve Substances 0.000 title claims abstract description 1195
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 title claims abstract description 1193
- 239000011258 core-shell material Substances 0.000 title claims abstract description 410
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 85
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 84
- 238000001228 spectrum Methods 0.000 claims abstract description 47
- 238000002441 X-ray diffraction Methods 0.000 claims abstract description 23
- 230000003197 catalytic effect Effects 0.000 claims abstract description 12
- 239000003054 catalyst Substances 0.000 claims description 304
- 238000000034 method Methods 0.000 claims description 175
- 239000000463 material Substances 0.000 claims description 173
- 238000002425 crystallisation Methods 0.000 claims description 166
- 230000008025 crystallization Effects 0.000 claims description 166
- 229910052782 aluminium Inorganic materials 0.000 claims description 150
- 239000002245 particle Substances 0.000 claims description 128
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 121
- 239000011148 porous material Substances 0.000 claims description 118
- 239000011734 sodium Substances 0.000 claims description 116
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 110
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 109
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 99
- 239000013078 crystal Substances 0.000 claims description 99
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 99
- 238000004523 catalytic cracking Methods 0.000 claims description 94
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 88
- 239000002002 slurry Substances 0.000 claims description 87
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 77
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 67
- 229910052708 sodium Inorganic materials 0.000 claims description 67
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 claims description 65
- 235000002639 sodium chloride Nutrition 0.000 claims description 61
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 60
- 239000010703 silicon Substances 0.000 claims description 60
- 229910052710 silicon Inorganic materials 0.000 claims description 60
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 57
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 57
- 238000003756 stirring Methods 0.000 claims description 56
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 55
- 239000000203 mixture Substances 0.000 claims description 55
- 238000006243 chemical reaction Methods 0.000 claims description 52
- 239000004927 clay Substances 0.000 claims description 52
- 238000001035 drying Methods 0.000 claims description 43
- 239000003921 oil Substances 0.000 claims description 43
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 41
- 239000000377 silicon dioxide Substances 0.000 claims description 39
- 238000001914 filtration Methods 0.000 claims description 38
- 239000011780 sodium chloride Substances 0.000 claims description 38
- 229940073455 tetraethylammonium hydroxide Drugs 0.000 claims description 35
- LRGJRHZIDJQFCL-UHFFFAOYSA-M tetraethylazanium;hydroxide Chemical compound [OH-].CC[N+](CC)(CC)CC LRGJRHZIDJQFCL-UHFFFAOYSA-M 0.000 claims description 35
- 239000000295 fuel oil Substances 0.000 claims description 34
- 239000004094 surface-active agent Substances 0.000 claims description 34
- 150000002910 rare earth metals Chemical class 0.000 claims description 31
- 239000003795 chemical substances by application Substances 0.000 claims description 30
- 229910052799 carbon Inorganic materials 0.000 claims description 28
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 claims description 24
- 239000002585 base Substances 0.000 claims description 21
- 239000004215 Carbon black (E152) Substances 0.000 claims description 20
- 235000019270 ammonium chloride Nutrition 0.000 claims description 20
- 239000010779 crude oil Substances 0.000 claims description 20
- 229930195733 hydrocarbon Natural products 0.000 claims description 20
- 150000002430 hydrocarbons Chemical class 0.000 claims description 20
- 235000019353 potassium silicate Nutrition 0.000 claims description 18
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 18
- HWCKGOZZJDHMNC-UHFFFAOYSA-M tetraethylammonium bromide Chemical compound [Br-].CC[N+](CC)(CC)CC HWCKGOZZJDHMNC-UHFFFAOYSA-M 0.000 claims description 18
- 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 17
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 claims description 17
- WJJMNDUMQPNECX-UHFFFAOYSA-N dipicolinic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=N1 WJJMNDUMQPNECX-UHFFFAOYSA-N 0.000 claims description 16
- 229910002027 silica gel Inorganic materials 0.000 claims description 16
- 239000000741 silica gel Substances 0.000 claims description 16
- 238000005984 hydrogenation reaction Methods 0.000 claims description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 14
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical group [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 14
- 239000006229 carbon black Substances 0.000 claims description 14
- VDZOOKBUILJEDG-UHFFFAOYSA-M tetrabutylammonium hydroxide Chemical compound [OH-].CCCC[N+](CCCC)(CCCC)CCCC VDZOOKBUILJEDG-UHFFFAOYSA-M 0.000 claims description 14
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical group CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 13
- 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 13
- 239000003513 alkali Substances 0.000 claims description 12
- 229920000371 poly(diallyldimethylammonium chloride) polymer Polymers 0.000 claims description 12
- 239000000654 additive Substances 0.000 claims description 11
- 150000003839 salts Chemical class 0.000 claims description 11
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 10
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 9
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 9
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 9
- 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 8
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 8
- 239000000499 gel Substances 0.000 claims description 8
- 230000002194 synthesizing effect Effects 0.000 claims description 8
- YMBCJWGVCUEGHA-UHFFFAOYSA-M tetraethylammonium chloride Chemical compound [Cl-].CC[N+](CC)(CC)CC YMBCJWGVCUEGHA-UHFFFAOYSA-M 0.000 claims description 8
- QSUJAUYJBJRLKV-UHFFFAOYSA-M tetraethylazanium;fluoride Chemical group [F-].CC[N+](CC)(CC)CC QSUJAUYJBJRLKV-UHFFFAOYSA-M 0.000 claims description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 7
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 7
- 229910021529 ammonia Inorganic materials 0.000 claims description 7
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 7
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 7
- BGQMOFGZRJUORO-UHFFFAOYSA-M tetrapropylammonium bromide Chemical compound [Br-].CCC[N+](CCC)(CCC)CCC BGQMOFGZRJUORO-UHFFFAOYSA-M 0.000 claims description 7
- LPSKDVINWQNWFE-UHFFFAOYSA-M tetrapropylazanium;hydroxide Chemical compound [OH-].CCC[N+](CCC)(CCC)CCC LPSKDVINWQNWFE-UHFFFAOYSA-M 0.000 claims description 7
- 229910052726 zirconium Inorganic materials 0.000 claims description 7
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 6
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims description 6
- UNYSKUBLZGJSLV-UHFFFAOYSA-L calcium;1,3,5,2,4,6$l^{2}-trioxadisilaluminane 2,4-dioxide;dihydroxide;hexahydrate Chemical compound O.O.O.O.O.O.[OH-].[OH-].[Ca+2].O=[Si]1O[Al]O[Si](=O)O1.O=[Si]1O[Al]O[Si](=O)O1 UNYSKUBLZGJSLV-UHFFFAOYSA-L 0.000 claims description 5
- 229910052676 chabazite Inorganic materials 0.000 claims description 5
- 101150091051 cit-1 gene Proteins 0.000 claims description 5
- 229910052680 mordenite Inorganic materials 0.000 claims description 5
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims description 4
- 229910001392 phosphorus oxide Inorganic materials 0.000 claims description 3
- 239000001103 potassium chloride Substances 0.000 claims description 3
- 235000011164 potassium chloride Nutrition 0.000 claims description 3
- LFGREXWGYUGZLY-UHFFFAOYSA-N phosphoryl Chemical class [P]=O LFGREXWGYUGZLY-UHFFFAOYSA-N 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 196
- 230000000052 comparative effect Effects 0.000 description 78
- 239000001257 hydrogen Substances 0.000 description 70
- 229910052739 hydrogen Inorganic materials 0.000 description 70
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical group [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 68
- 239000000725 suspension Substances 0.000 description 63
- 238000002360 preparation method Methods 0.000 description 49
- 238000005406 washing Methods 0.000 description 42
- 150000003863 ammonium salts Chemical class 0.000 description 41
- 238000001694 spray drying Methods 0.000 description 38
- -1 alkali metal salt Chemical class 0.000 description 35
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical group [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 34
- 239000012298 atmosphere Substances 0.000 description 32
- 238000001308 synthesis method Methods 0.000 description 32
- 239000008367 deionised water Substances 0.000 description 29
- 229910021641 deionized water Inorganic materials 0.000 description 29
- 238000001354 calcination Methods 0.000 description 28
- 239000005995 Aluminium silicate Substances 0.000 description 27
- 235000012211 aluminium silicate Nutrition 0.000 description 27
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 27
- 238000011156 evaluation Methods 0.000 description 23
- 239000000460 chlorine Substances 0.000 description 22
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 18
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- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 14
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 14
- 235000011130 ammonium sulphate Nutrition 0.000 description 14
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 14
- 229910001948 sodium oxide Inorganic materials 0.000 description 14
- 229910001570 bauxite Inorganic materials 0.000 description 12
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 12
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 12
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- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 10
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
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- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 6
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- 238000010304 firing Methods 0.000 description 6
- 229910052746 lanthanum Inorganic materials 0.000 description 6
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- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 5
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- 230000004044 response Effects 0.000 description 5
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- UZLCPLNXRKKHES-UHFFFAOYSA-M sodium methyl 2-methylprop-2-enoate chloride Chemical compound [Cl-].[Na+].COC(C(=C)C)=O UZLCPLNXRKKHES-UHFFFAOYSA-M 0.000 description 5
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- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 5
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
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- AVPRDNCYNYWMNB-UHFFFAOYSA-N ethanamine;hydrate Chemical compound [OH-].CC[NH3+] AVPRDNCYNYWMNB-UHFFFAOYSA-N 0.000 description 4
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- NJSSICCENMLTKO-HRCBOCMUSA-N [(1r,2s,4r,5r)-3-hydroxy-4-(4-methylphenyl)sulfonyloxy-6,8-dioxabicyclo[3.2.1]octan-2-yl] 4-methylbenzenesulfonate Chemical compound C1=CC(C)=CC=C1S(=O)(=O)O[C@H]1C(O)[C@@H](OS(=O)(=O)C=2C=CC(C)=CC=2)[C@@H]2OC[C@H]1O2 NJSSICCENMLTKO-HRCBOCMUSA-N 0.000 description 3
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- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 3
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- PRAHCKGOTFKWKD-UHFFFAOYSA-N dimethyl(propyl)azanium;chloride Chemical compound Cl.CCCN(C)C PRAHCKGOTFKWKD-UHFFFAOYSA-N 0.000 description 2
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- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 2
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- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 239000004113 Sepiolite Substances 0.000 description 1
- URRHWTYOQNLUKY-UHFFFAOYSA-N [AlH3].[P] Chemical compound [AlH3].[P] URRHWTYOQNLUKY-UHFFFAOYSA-N 0.000 description 1
- YAIQCYZCSGLAAN-UHFFFAOYSA-N [Si+4].[O-2].[Al+3] Chemical compound [Si+4].[O-2].[Al+3] YAIQCYZCSGLAAN-UHFFFAOYSA-N 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 229910001514 alkali metal chloride Inorganic materials 0.000 description 1
- 229910001963 alkali metal nitrate Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910001420 alkaline earth metal ion Inorganic materials 0.000 description 1
- 230000029936 alkylation Effects 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 230000003698 anagen phase Effects 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 229960000892 attapulgite Drugs 0.000 description 1
- 229910001680 bayerite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 229940092782 bentonite Drugs 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- 238000001833 catalytic reforming Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 239000002872 contrast media Substances 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 description 1
- 229910001648 diaspore Inorganic materials 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- PNZDZRMOBIIQTC-UHFFFAOYSA-N ethanamine;hydron;bromide Chemical compound Br.CCN PNZDZRMOBIIQTC-UHFFFAOYSA-N 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 229910001679 gibbsite Inorganic materials 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 229910001701 hydrotalcite Inorganic materials 0.000 description 1
- 229960001545 hydrotalcite Drugs 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000010762 marine fuel oil Substances 0.000 description 1
- 239000000320 mechanical mixture Substances 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 238000000696 nitrogen adsorption--desorption isotherm Methods 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 229910000275 saponite Inorganic materials 0.000 description 1
- 229910052624 sepiolite Inorganic materials 0.000 description 1
- 235000019355 sepiolite Nutrition 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000008279 sol Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- VSAISIQCTGDGPU-UHFFFAOYSA-N tetraphosphorus hexaoxide Chemical compound O1P(O2)OP3OP1OP2O3 VSAISIQCTGDGPU-UHFFFAOYSA-N 0.000 description 1
- 238000010555 transalkylation reaction Methods 0.000 description 1
- 229910001428 transition metal ion Inorganic materials 0.000 description 1
Images
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/19—Catalysts containing parts with different compositions
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/023—Preparation of physical mixtures or intergrowth products of zeolites chosen from group C01B39/04 or two or more of groups C01B39/14 - C01B39/48
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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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- B01J35/20—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
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- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/396—Distribution of the active metal ingredient
- B01J35/397—Egg shell like
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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
- B01J35/64—Pore diameter
- B01J35/647—2-50 nm
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/04—Mixing
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- B01J37/08—Heat treatment
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- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/026—After-treatment
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/36—Pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
- C01B39/38—Type ZSM-5
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/30—After treatment, characterised by the means used
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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
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/60—Synthesis on support
- B01J2229/62—Synthesis on support in or on other molecular sieves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Definitions
- This application relates to the technical field of catalytic materials, in particular to a ZSM-5/ ⁇ core-shell molecular sieve and its synthesis and application.
- Zeolite molecular sieve is a kind of microporous crystalline material with a framework structure. It has a pore structure of specific size and shape, a larger specific surface area and strong adjustable acid properties. It is widely used in the process of petroleum refining and processing. Such as catalytic cracking, alkane isomerization, catalytic reforming and toluene disproportionation and other catalytic reactions.
- ZSM-5 molecular sieve with MFI topology and ⁇ molecular sieve with BEA topology are two types of molecular sieves that are widely used in industry.
- ZSM-5 molecular sieve is a mesoporous molecular sieve (USP3702886) with a high silicon three-dimensional straight channel developed by the American Mobil Petroleum Company. It has a unique pore structure and belongs to the orthorhombic crystal system.
- the unit cell parameters are The number of Al atoms in the unit cell can vary from 0 to 27, and the silicon-to-aluminum ratio can be changed within a relatively large range; the ZSM-5 framework contains two intersecting 10-membered ring channel systems, one of which is curved in an S shape.
- the aperture is A kind of pore is linear, the aperture is ZSM-5 has good shape-selective catalysis and isomerization performance, high thermal and hydrothermal stability, high specific surface area, wide range of silicon-to-aluminum ratio, unique surface acidity and low carbon formation characteristics, and is widely used
- Catalysts and catalyst carriers have been successfully used in the production processes of alkylation, isomerization, disproportionation, catalytic cracking, methanol-to-gasoline, and methanol-to-olefins.
- ⁇ molecular sieve is a high-silica zeolite with a large pore three-dimensional structure with a cross-twelve-membered ring channel system.
- the pore size of its twelve-membered ring three-dimensional cross-pore system is and Due to the particularity of its structure, it has both acid catalytic properties and structural selectivity. It has good thermal and hydrothermal stability, moderate acidity and acid stability and hydrophobicity. It is used in transalkylation reactions and lightening reactions of heavy aromatics. It exhibits excellent catalytic performance, and its catalytic application shows the characteristics of difficult coking in hydrocarbon reactions and long service life.
- ZSM-5 molecular sieve has a shape-selective function, its pore size is small, which is not conducive to the diffusion and adsorption of macromolecular reactants, especially cyclic hydrocarbons.
- ⁇ molecular sieve has a larger pore size, larger molecular reactants can Enter to increase the accessibility of the active center, but it has no shape-selective function for small molecular weight olefins such as ethylene and propylene.
- ZSM-5 molecular sieve and ⁇ molecular sieve are also used at the same time for hydrocarbon oil conversion.
- the common method is to use a mechanical mixture of the two molecular sieves. In this case, the distance between ZSM-5 molecular sieve particles and ⁇ molecular sieve particles is relatively short. long.
- the purpose of this application is to provide a novel ZSM-5/ ⁇ core-shell molecular sieve and its synthesis and application.
- the core-shell molecular sieve has the core phase of the ZSM-5 molecular sieve and the shell layer of the ⁇ molecular sieve. It has better conversion effect when used in the catalytic conversion of hydrocarbon oil.
- this application provides a ZSM-5/ ⁇ core-shell molecular sieve, which includes a core phase composed of at least two ZSM-5 molecular sieve crystal grains and a shell composed of a plurality of ⁇ molecular sieve crystal grains.
- the average crystal grain size of the ZSM-5 molecular sieve crystal grains is 0.05-15 ⁇ m, the shell coverage of the core-shell molecular sieve is 50-100%, the shell thickness is 10-2000 nm, and the ⁇ molecular sieve in the shell
- the peak height ratio is 0.1-10:1.
- this application provides a method for synthesizing ZSM-5/ ⁇ core-shell molecular sieve, which includes the following steps:
- the particles of the ZSM-5 molecular sieve used in step 1) are composed of at least 2 ZSM-5 molecular sieve crystal particles.
- the present application provides a catalyst, on a dry basis weight and based on the weight of the catalyst, the catalyst comprises 30-90 wt% of the carrier, 2-50 wt% of the ZSM-5 according to the present application / ⁇ core-shell molecular sieve, and 0-50wt% additional molecular sieve.
- the sodium content as Na 2 O in the ZSM-5/ ⁇ core-shell molecular sieve does not exceed 0.15% by weight.
- the present application provides a method for catalytic conversion of hydrocarbon oil, which includes the step of contacting a hydrocarbon oil feedstock with the catalyst according to the present application.
- the core-shell molecular sieve of the present application can be used in hydrocarbon conversion reactions, such as catalytic cracking reactions, alkylation reactions and isomerization reactions.
- hydrocarbon conversion reactions such as catalytic cracking reactions, alkylation reactions and isomerization reactions.
- the core-shell molecular sieve of the present application is used for hydrocarbon oil cracking or cracking, and has a better conversion effect. It is used for the cracking of naphthenic ring-containing hydrocarbon oil, such as hydrogenation LCO cracking conversion, and the propylene yield is higher and/ Or the ethylene yield is higher, and the heavy oil conversion rate is higher.
- the ZSM-5/ ⁇ core-shell molecular sieve synthesis method provided in this application can have one or more of the following beneficial effects:
- the synthesized molecular sieve has a relatively high ratio of mesopore surface area
- the synthesized molecular sieve has many 2-50nm pores, and its pore diameter distribution has pore diameter distribution peaks at pore diameters of 2-4nm and 20-80nm, and has abundant mesopores and macropore pore volumes.
- Figure 1 shows the SEM image of the ZSM-5/ ⁇ core-shell molecular sieve prepared in Example I-1 of the present application
- Figure 2A shows the XRD diffraction pattern of the molecular sieve, where 1 is the XRD diffraction pattern of the ZSM-5 molecular sieve, 2 is the XRD diffraction pattern of the ⁇ molecular sieve, and 3 is the ZSM-5/ ⁇ obtained in Example I-1 of the present application XRD diffraction pattern of the core-shell molecular sieve;
- Figure 3 shows the XRD diffraction spectrum of the pre-crystallized synthetic solution III obtained in Example I-1 of the present application;
- Figure 4 shows the TEM image of the ZSM-5/ ⁇ core-shell molecular sieve prepared in Example I-1 of the present application.
- Figure 5 shows the pore size distribution diagram of the ZSM-5/ ⁇ core-shell molecular sieve prepared in Example I-1 of the present application.
- any specific numerical value (including the end point of the numerical range) disclosed in this article is not limited to the precise value of the numerical value, but should be understood to also cover values close to the precise value, for example, within the range of ⁇ 5% of the precise value All possible values.
- between the endpoints of the range, between the endpoints and the specific point values in the range, and between the specific point values can be combined arbitrarily to obtain one or more new Numerical ranges, these new numerical ranges should also be regarded as specifically disclosed herein.
- the grain size refers to the size of the widest part of the crystal grain, which can be obtained by measuring the size of the widest part of the projected surface of the crystal grain in the SEM or TEM image of the sample.
- the average crystal grain size of the multiple crystal grains is the average crystal grain size of the sample.
- the particle size refers to the size of the widest part of the particle, which can be measured by measuring the size of the widest part of the particle projection surface in the SEM or TEM image of the sample, and the average particle size of multiple particles is the average particle size of the sample. It can also be measured by a laser particle size analyzer.
- One grain may include one or more crystal grains.
- the dry basis weight refers to the weight of the solid product obtained after the substance is calcined in air at 850°C for 1 hour.
- the catalyst-to-oil ratio refers to the weight ratio of the catalyst to the feedstock oil.
- sodium core-shell molecular sieve refers to the ZSM-5/ ⁇ core-shell molecular sieve obtained after the crystallization step without the treatment of reducing Na 2 O content (such as ammonium exchange);
- “Hydrogen core-shell molecular sieve” or “modified core-shell molecular sieve” means that the “sodium core-shell molecular sieve” is processed (such as ammonium exchange) to reduce the Na 2 O content (for example, the Na 2 O content is reduced to less than 0.15% by weight) ZSM-5/ ⁇ core-shell molecular sieve obtained afterwards.
- the term "heavy oil” has a well-known meaning in the art, for example, it can be, for example, atmospheric residue, atmospheric gas oil, vacuum residue, vacuum gas oil, coker wax oil, light and heavy deasphalted oil. One or more.
- intermediate base crude oil refers to a type of crude oil whose properties are between paraffin base crude oil and naphthenic crude oil, its characteristic factor is 11.5-12.1, and its alkane and naphthenic content are basically similar.
- any matters or matters not mentioned are directly applicable to those known in the art without any changes.
- any embodiment described herein can be freely combined with one or more other embodiments described herein, and the technical solutions or technical ideas formed thereby shall be regarded as part of the original disclosure or original record of the present invention, and shall not be It is regarded as new content that has not been disclosed or anticipated in this article, unless those skilled in the art think that the combination is obviously unreasonable.
- the present application provides a ZSM-5/ ⁇ core-shell molecular sieve, which includes a core phase composed of at least two ZSM-5 molecular sieve crystal particles and a plurality of ⁇ molecular sieve crystal particles.
- the ratio of) is 0.1-10:1.
- the mass ratio of the core phase to the shell layer of the core-shell molecular sieve is 0.2-20:1, for example, 1-15:1, wherein the core phase
- the mass ratio to the shell layer can be calculated using the peak area of the X-ray diffraction spectrum.
- the total specific surface area of the ZSM-5/ ⁇ core-shell molecular sieve (also called the specific surface area of the ZSM-5/ ⁇ core-shell molecular sieve) is greater than 420m 2 /g, for example, 420-650m 2 /g. Further preferably, the total specific surface area of the ZSM-5/ ⁇ core-shell molecular sieve is greater than 450m 2 /g, for example, 450-620m 2 /g, 480-600m 2 /g, 490-580m 2 /g or 500- 560m 2 /g.
- the ratio of the mesopore surface area to the total surface area (or the mesopore specific surface area to the total specific surface area) of the ZSM-5/ ⁇ core-shell molecular sieve It is 10-40%, for example 12-35%.
- mesopores refer to pores with a diameter of 2-50 nm.
- the ZSM-5/ ⁇ core-shell molecular sieve based on the total pore volume of the ZSM-5/ ⁇ core-shell molecular sieve, in the ZSM-5/ ⁇ core-shell molecular sieve, the pore volume of pores with a pore diameter of 0.3-0.6 nm accounts for 40-90%, for example, 40-88%, 50-85%, 60-85% or 70-82%.
- the ZSM-5/ ⁇ core-shell molecular sieve based on the total pore volume of the ZSM-5/ ⁇ core-shell molecular sieve, in the ZSM-5/ ⁇ core-shell molecular sieve, the pore volume of pores with a pore diameter of 0.7-1.5 nm accounts for 3-20%, for example, 3-15% or 3-9%.
- the ZSM-5/ ⁇ core-shell molecular sieve based on the total pore volume of the ZSM-5/ ⁇ core-shell molecular sieve, in the ZSM-5/ ⁇ core-shell molecular sieve, the pore volume of pores with a pore diameter of 2-4 nm accounts for 4-50%, for example, 4-40% or 4-20% or 4-10%.
- the ZSM-5/ ⁇ core-shell molecular sieve based on the total pore volume of the ZSM-5/ ⁇ core-shell molecular sieve, in the ZSM-5/ ⁇ core-shell molecular sieve, the pore volume of pores with a pore diameter of 20-80 nm accounts for 5-40%, for example, 5-30% or 6-20% or 7-18% or 8-16%.
- the pore volume of the core-shell molecular sieve with a pore diameter of 2-80 nm accounts for 10-30% of the total pore volume, for example, 11-25% .
- the pore volume of the core-shell molecular sieve with a pore diameter of 20-80 nm accounts for 50-70% of the pore volume of a pore with a pore diameter of 2-80 nm. , Such as 55-65% or 58-64%.
- the total pore volume of the ZSM-5/ ⁇ core-shell molecular sieve is 0.28-0.42 mL/g, for example, 0.3-0.4 mL/g or 0.32-0.38mL/g.
- the ZSM-5/ ⁇ core-shell molecular sieve of the present application has an obvious micropore-mesopore-macropore stepped pore distribution, and has a pore diameter in the range of 2-4nm and 20-80nm.
- the abundant mesoporous and macroporous pore volume is conducive to the hierarchical cracking of naphthenic heavy oil macromolecules.
- the total pore volume and pore size distribution can be measured by the low-temperature nitrogen adsorption capacity method, and the BJH calculation method is used to calculate the pore size distribution.
- the average crystal grain size of the ⁇ molecular sieve crystal grains in the shell layer of the ZSM-5/ ⁇ core-shell molecular sieve is 10-500 nm, for example, 50-500 nm. 500nm.
- the thickness of the shell layer of the ZSM-5/ ⁇ core-shell molecular sieve is 10-2000 nm, for example, 50-2000 nm.
- the silicon to aluminum ratio of the shell molecular sieve (that is, the ⁇ molecular sieve in the shell) (that is, the silicon to aluminum molar ratio in terms of SiO 2 /Al 2 O 3) ) Is 10-500, preferably 10-300, for example 30-200 or 25-200.
- the core-phase molecular sieve (that is, the ZSM-5 molecular sieve in the core phase) of the ZSM-5/ ⁇ core-shell molecular sieve has a silicon-to-aluminum ratio of 10 - ⁇ , for example, 20- ⁇ , 50- ⁇ , 30-300, 30-200, 20-80, 25-70, or 30-60.
- the core-phase molecular sieve particles of the ZSM-5/ ⁇ core-shell molecular sieve are agglomerates of a plurality of ZSM-5 molecular sieve crystal particles, and among the single particles of the core-phase molecular sieve, the number of ZSM-5 molecular sieve crystal particles The number is not less than 2.
- the average crystal grain size of the ZSM-5 molecular sieve crystal grains in the core phase of the ZSM-5/ ⁇ core-shell molecular sieve is 0.05-15 ⁇ m, preferably It is 0.1-10 ⁇ m, for example, 0.1-5 ⁇ m or 0.1-1.2 ⁇ m.
- the average particle size of the ZSM-5 molecular sieve particles in the core phase of the ZSM-5/ ⁇ core-shell molecular sieve is 0.1-30 ⁇ m, for example 0.2- 25 ⁇ m, 0.5-10 ⁇ m, 1-5 ⁇ m or 2-4 ⁇ m.
- the shell coverage of the core-shell molecular sieve is 50-100%, such as 80-100%.
- this application provides a method for synthesizing ZSM-5/ ⁇ core-shell molecular sieve, which includes the following steps:
- step 1) the treatment of step 1) is carried out as follows: ZSM-5 molecular sieve (raw material) in the form of particles is added to a weight percent concentration of 0.05 -50%, preferably 0.1-30%, for example, 0.1-5% surfactant solution; preferably contacting under stirring, followed by filtration and drying to obtain the ZSM-5 molecular sieve material I.
- the drying in step 1) has no special requirements, for example, drying, flash drying, and airflow drying can be used.
- the drying temperature is 50-150°C, and the drying time is not limited, as long as the sample is dried, for example, it can be 0.5-4h.
- the treatment in step 1) is performed at 20-70°C for more than 0.5 hours, such as 0.5-48 hours or 1-36 hours.
- the weight ratio of the surfactant solution to the ZSM-5 molecular sieve on a dry basis in step 1) is 10-200:1.
- the surfactant solution may also contain a salt, and the salt can separate or disperse the surfactant and has an electrolyte.
- Nature salt for example, soluble in one or more of alkali metal salt and ammonium salt in water, preferably alkali metal chloride salt, alkali metal nitrate, ammonium chloride salt, ammonium nitrate
- the salt may be selected from sodium chloride, potassium chloride, ammonium chloride, ammonium nitrate or a combination thereof; the concentration of the salt in the surfactant solution is preferably 0.05-10.0 by weight %, for example 0.2-2% by weight.
- the addition of the salt is beneficial to the adsorption of the surfactant.
- the surfactant can be selected from polymethylmethacrylate, polydiallyldimethylammonium chloride, dipyridine Carboxylic acid, ammonia, ethylamine, n-butylamine, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetraethylammonium bromide, tetrapropylammonium bromide, tetrabutylammonium hydroxide, or a combination thereof.
- the silicon-to-aluminum ratio of the particle form of the ZSM-5 molecular sieve in step 1) is 10- ⁇ ; for example, as described in step 1)
- the silicon-to-aluminum ratio of the ZSM-5 molecular sieve in the form of particles may be 20- ⁇ , 50- ⁇ , 30-300, 30-200, 40-70, 20-80, 25-70, or 30-60.
- the particles of the ZSM-5 molecular sieve in the particle form described in step 1) are composed of at least 2 ZSM-5 molecular sieve crystal particles.
- the average crystal grain size of the ZSM-5 molecular sieve crystal grains is 0.05-20 ⁇ m, for example, 0.1-10 ⁇ m.
- the average particle size of the ZSM-5 molecular sieve in the form of particles is 0.1-30 ⁇ m, for example, 0.5-25 ⁇ m, 1-25 ⁇ m, 1 -20 ⁇ m, 1-5 ⁇ m or 2-4 ⁇ m.
- the ZSM-5 molecular sieve used in step 1) is a sodium-type, hydrogen-type or ion-exchanged ZSM-5 molecular sieve.
- the ion-exchanged ZSM-5 molecular sieve refers to ZSM-5 molecular sieve (such as sodium ZSM-5 molecular sieve) and ions other than alkali metals, such as transition metal ions, ammonium ions, alkaline earth metal ions, IIIA group metal ions, IVA group
- the exchanged ZSM-5 molecular sieve obtained after the exchange of metal ions and VA metal ions.
- step 2) the treatment of step 2) is carried out as follows: ZSM-5 molecular sieve material I is added to the ⁇ molecular sieve containing particles ( ⁇ molecular sieve is also The contact is carried out in the slurry (called ⁇ zeolite); preferably, the contact is carried out under stirring, followed by filtration and drying to obtain the ZSM-5 molecular sieve material II.
- the treatment of step 2) is performed at 20-60°C for more than 0.5 hours, for example, 1-24 hours.
- the concentration of the ⁇ molecular sieve in the slurry containing the particle form of the ⁇ molecular sieve in step 2) is 0.1-10% by weight, for example, 0.3- 8% by weight or 0.2-1% by weight.
- the weight ratio of the slurry containing the ⁇ molecular sieve to the ZSM-5 molecular sieve material I on a dry basis is 10- 50:1, preferably, the weight ratio of ⁇ molecular sieve on a dry basis to ZSM-5 molecular sieve material I on a dry basis is 0.01-1:1, for example, 0.02-0.35:1.
- the particles of the ⁇ molecular sieve in the particle form in step 2) are composed of at least one ⁇ molecular sieve crystal particle.
- the average crystal grain size of the ⁇ molecular sieve crystal grains is 10-500 nm, for example, 50-400 nm, 100-300 nm, 10-300 nm or 200-500 nm.
- the average crystal grain size of the ⁇ molecular sieve crystal grains is smaller than the average crystal grain size of the ZSM-5 molecular sieve crystal grains.
- the average crystal grain size of the ⁇ molecular sieve crystal grains is 10-500 nm smaller than that of the ZSM-5 molecular sieve crystal grains, or the average crystal grain size of the ZSM-5 molecular sieve crystal grains is that of the ⁇ molecular sieve crystals
- the average crystal grain size is more than 1.5 times, for example, 2-50 or 5-20 times.
- the average particle size of the ⁇ molecular sieve in the particle form in step 2) is 0.01-0.5 ⁇ m, for example, 0.05-0.5 ⁇ m.
- the particles of the ⁇ molecular sieve are single crystal particles.
- the silicon to aluminum ratio of the ⁇ molecular sieve used in step 2) is 10-500, for example, 30-200 or 25-200.
- the silicon source can be selected from ethyl orthosilicate, water glass, coarse-pored silica gel, silica sol, white silica Carbon black, activated clay, or a combination thereof;
- the aluminum source may be selected from aluminum sulfate, aluminum isopropoxide, aluminum nitrate, aluminum sol, sodium metaaluminate, ⁇ -alumina, or a combination thereof;
- the alkali source may Selected from sodium hydroxide, potassium hydroxide or a combination thereof;
- the template (R) is, for example, tetraethylammonium fluoride, tetraethylammonium hydroxide, tetraethylammonium chloride, tetraethyl bromide
- the template includes tetraethylammonium fluoride, tetraethylammonium hydroxide, tetraethylammonium chloride, tetraethyl bromid
- step 3 the silicon source, aluminum source, optional alkali source, template R and deionized water are mixed A synthetic solution is formed, and then crystallization is performed at 75-250°C for 10-80 hours to obtain a pre-crystallization synthetic solution III; preferably, the crystallization temperature of the crystallization (ie, the first crystallization) in step 3) is 80-180 °C, the crystallization time is 18 hours-50 hours.
- the crystallization temperature of the crystallization ie, the first crystallization
- the crystallization time is 18 hours-50 hours.
- the crystallization in step 3 makes the crystallization state of the obtained pre-crystallization synthesis solution III such that the crystal grains will not appear yet.
- the emerging state is approaching the end of the crystallization induction period and is about to enter the rapid growth phase of crystal nuclei.
- the XRD analysis method of the pre-crystallized synthetic solution III can be carried out as follows: the pre-crystallized synthetic solution III is filtered, washed, dried, and calcined at 550°C for 4 hours, and then subjected to XRD analysis, wherein the washing can be used to remove Ionized water washing.
- the ZSM-5 molecular sieve material II is mixed with the pre-crystallization synthesis liquid III, for example, the ZSM-5 molecular sieve
- the material II is added to the pre-crystallized synthesis solution III, wherein the weight ratio of the pre-crystallized synthesis solution III to the ZSM-5 molecular sieve material II on a dry basis is 2-10:1, for example, 4-10:1.
- the weight ratio of the ZSM-5 molecular sieve on a dry basis to the pre-crystallization synthesis liquid III on a dry basis is greater than 0.2:1, for example, 0.3-20:1, 1-15:1, 0.5- 10:1, 0.5-5:1, 0.8-2:1 or 0.9-1.7:1, wherein the dry basis weight of the pre-crystallized synthetic liquid III refers to the pre-crystallized synthetic liquid III after filtering, drying, and The weight of the solid product obtained after calcination in air at 850°C for 1 hour.
- the crystallization temperature of the crystallization (that is, the second crystallization) in step 4) is 50-300°C, and the crystallization time is 10-400h.
- the ZSM-5 molecular sieve material II is mixed with the pre-crystallization synthesis solution III and then crystallized at 100-250°C 30-350h.
- the crystallization temperature of the crystallization is, for example, 100-200°C, and the crystallization time is, for example, 50-120h.
- the process of recovering the core-shell molecular sieve may also be included, and the recovery usually includes: filtering, washing One or more steps of drying and roasting, such as filtering the crystallized product, then washing and drying, and optionally roasting.
- the drying is a conventional technique, such as air drying, drying, airflow drying, and flash drying.
- the drying conditions may be a temperature of 50-150°C and a time of 0.5-4h.
- the washing is a conventional technique.
- water washing can be used.
- the water can be one or more of deionized water, distilled water, and decationized water.
- the weight ratio of core-shell molecular sieve to water can be, for example, 1: 5-20, you can wash one or more times, until the pH of the washed water is 8-9.
- the firing conditions can be, for example, a firing temperature of 400-600°C and a firing time of 2-10h.
- the core phase of the obtained ZSM-5/ ⁇ core-shell molecular sieve is ZSM-5 molecular sieve
- the shell layer is ⁇ molecular sieve
- the shell layer is ⁇ molecular sieve
- the silicon to aluminum ratio of the molecular sieve is 10-500, such as 25-200, in terms of SiO 2 /Al 2 O 3.
- the method for synthesizing the ZSM-5/ ⁇ core-shell molecular sieve of the present application includes the following steps:
- the silicon-to-aluminum molar ratio SiO 2 /Al 2 O 3 of the ZSM-5 molecular sieve is preferably 20- ⁇ , such as 50- ⁇ ;
- the method for synthesizing the ZSM-5/ ⁇ core-shell molecular sieve of the present application may further include: 5) performing ammonium exchange on the core-shell molecular sieve (ie, sodium core-shell molecular sieve) obtained in step 4) to make The Na 2 O content in the core-shell molecular sieve is less than 0.15% by weight; and
- step 6) Dry the core-shell molecular sieve obtained in step 5) and calcinate at 400-600° C. for 2-10 hours to remove the template agent to obtain a hydrogen core-shell molecular sieve.
- Exchange, followed by filtration, this process can be carried out one or more times; the ammonium salt is selected from a mixture of one or more of ammonium chloride, ammonium sulfate, and ammonium nitrate.
- This application also provides a ZSM-5/ ⁇ core-shell molecular sieve material obtained by the ZSM-5/ ⁇ core-shell molecular sieve synthesis method.
- the application also provides the application of the ZSM-5/ ⁇ core-shell molecular sieve according to the application or the ZSM-5/ ⁇ core-shell molecular sieve synthesized by the method of the application in the catalytic cracking or catalytic cracking of hydrocarbon oil.
- the ZSM-5/ ⁇ core-shell molecular sieve is used as a part or all of the active components to prepare a catalytic cracking catalyst, and then used in the catalytic cracking or catalytic cracking reaction of hydrocarbon oil, which can increase the propylene yield of the reaction product and/ Or ethylene yield.
- the present application provides a catalyst, on a dry basis weight and based on the weight of the catalyst, the catalyst contains 30-90wt% of the carrier, 2-50wt% of the Applied ZSM-5/ ⁇ core-shell molecular sieve, and 0-50wt% additional molecular sieve,
- the carrier may include one or more of clay, alumina carrier, silica carrier, silica alumina carrier, phosphoalumina gel, and zirconium sol.
- the clay may be natural clays such as kaolin, montmorillonite, diatomaceous earth, halloysite, pseudo halloysite, saponite, rectorite, sepiolite, attapulgite, hydrotalcite, and bentonite.
- clays such as kaolin, montmorillonite, diatomaceous earth, halloysite, pseudo halloysite, saponite, rectorite, sepiolite, attapulgite, hydrotalcite, and bentonite.
- clays such as kaolin, montmorillonite, diatomaceous earth, halloysite, pseudo halloysite, saponite, rectorite, sepiolite, attapulgite, hydrotalcite, and bentonite.
- the alumina carrier may be, for example, one or more of acidified pseudo-boehmite, alumina sol, hydrated alumina, and activated alumina.
- the hydrated alumina can be, for example, one or more of pseudo-boehmite (without acidification), boehmite, gibbsite, Bayerite, nordiazite, and amorphous aluminum hydroxide. kind.
- the activated alumina may be, for example, one or more of ⁇ -alumina, ⁇ -alumina, ⁇ -alumina, ⁇ -alumina, ⁇ -alumina, and ⁇ -alumina.
- the acidified pseudo-boehmite can be obtained by acidification of pseudo-boehmite, where the acidification is well known to those skilled in the art.
- the pseudo-boehmite can be beaten with water to form a slurry, Then acid is added and stirred at 50-85°C for 0.2-1.5 hours, wherein the molar ratio of acid to pseudo-boehmite based on alumina is, for example, 0.10-0.25.
- the silica carrier may be, for example, one or more of silica sol, silica gel, and solid silica gel.
- the silica sol may be, for example, one or more of neutral silica sol, acidic silica sol or alkaline silica sol.
- the silicon aluminum oxide carrier may be, for example, one or more of silicon aluminum material, silicon aluminum sol, and silicon aluminum gel.
- the phosphoaluminum gel may be, for example, phosphoaluminum sol or phosphoaluminum gel.
- the zirconium sol may be, for example, zirconium sol or zirconium gel.
- the sodium content as Na 2 O in the ZSM-5/ ⁇ core-shell molecular sieve does not exceed 0.15% by weight.
- a core-shell molecular sieve with reduced sodium oxide content can be obtained by means of ammonium exchange.
- the additional molecular sieve may be various molecular sieves conventionally used in the preparation of catalytic cracking catalysts.
- the additional molecular sieve can be selected from Y-type molecular sieve and molecular sieve with pore opening diameter of 0.65-0.70 nanometers, or a combination thereof.
- the Y-type molecular sieve is a Y-type molecular sieve containing no rare earth or a Y-type molecular sieve with a low rare earth content, and the content of rare earth in the Y-type molecular sieve with a low rare earth content is less than RE 2 O 3 5 wt%, the silicon-to-aluminum ratio (SiO 2 /Al 2 O 3 molar ratio) of the Y-type molecular sieve is, for example, 4-18 or 4.5-15.
- the Y-type molecular sieve for example, one or more of DASY molecular sieve, DASY molecular sieve containing rare earth, HRY molecular sieve, HRY molecular sieve containing rare earth, DOSY molecular sieve, USY molecular sieve, USY molecular sieve containing rare earth, HY molecular sieve, REHY molecular sieve , Preferably one or more of HY molecular sieve, DASY molecular sieve and USY molecular sieve.
- the molecular sieve with an opening diameter of 0.65-0.70 nanometers has AET, AFR, AFS, AFI, BEA, BOG, CFI, CON, GME, IFR, ISV, LTL, MEI, MOR, One or more of molecular sieves of OFF and SAO structure; preferably Beta, SAPO-5, SAPO-40, SSZ-13, CIT-1, ITQ-7, ZSM-18, mordenite and sodium chabazite or these
- the combination of is more preferably ⁇ molecular sieve, for example, it may be hydrogen type ⁇ molecular sieve.
- the first embodiment of the catalyst of the present application is a hydrogenation VGO catalytic cracking catalyst, which contains a carrier including silica sol and modifying elements, and a core-shell molecular sieve according to the present application, wherein the catalyst is on a dry basis.
- the content of the carrier by weight is 50-90% by weight, preferably 55-75% by weight or 60-85% by weight, and the content of the core-shell molecular sieve on a dry basis is 10-50% by weight, preferably 20-45% by weight or 15-40% by weight, and the content of silica sol on a dry basis is 1-15% by weight, such as 5-15% by weight, and the content of the modifying element compound is 0.1-12% by weight, such as 0.5-10% by weight.
- the modifying elements are in the silica sol, more preferably, all the modifying elements are in the silica sol,
- the modifying element is a rare earth element.
- the rare earth element-containing silica sol is called modified silica sol in this application.
- the weight ratio of the rare earth as RE 2 O 3 to the silica sol as SiO 2 is 0.2-18 :100 preferably 1-18:100.
- the carrier further includes one or more of pseudo-boehmite, alumina sol and clay.
- the content of silica sol in the catalyst is 1-15% by weight
- the content of pseudo-boehmite is 5-25% by weight
- the content of aluminum sol is 3-20% by weight
- the content of clay is 25-50% by weight.
- the content of the rare earth oxide in the carrier is greater than 0-15 wt%, for example, 0.1-15 wt%, 1-15 wt%, 0.5-5 wt%, calculated as RE 2 O 3 % Or 0.2-10% by weight.
- the hydrogenated VGO catalytic cracking catalyst according to the first embodiment of the catalyst of the present application When used for the catalytic conversion of hydrogenated VGO, it has a higher yield of heavy oil and a higher yield of ethylene and propylene.
- the catalyst of the first type of embodiment of the present application can be prepared by a method including the following steps: forming a first slurry including silica sol, a modified element compound, a core-shell molecular sieve according to the present application, and spray drying, wherein the modification The sex element is a rare earth element.
- the preparation method of the catalyst of the first embodiment includes the following steps:
- step ii) Perform ammonium exchange on the sodium core-shell molecular sieve obtained in step i) so that the Na 2 O content in the core-shell molecular sieve is less than 0.15% by weight;
- step iii) Dry the core-shell molecular sieve obtained in step ii) and calcinate at 400-600°C for 2-10 hours to obtain a hydrogen core-shell molecular sieve;
- step iv) forming a first slurry comprising the rare earth salt, silica sol and the hydrogen core-shell molecular sieve obtained in step iii), and spray drying to obtain the catalyst.
- the process can be carried out one or more times; the ammonium salt is selected from a mixture of one or more of ammonium chloride, ammonium sulfate, and ammonium nitrate.
- step iii) the core-shell molecular sieve obtained in step ii) is dried and then calcined to remove the template agent, to obtain a core-shell molecular sieve with a reduced Na content (ie, a hydrogen core-shell molecular sieve).
- a core-shell molecular sieve with a reduced Na content ie, a hydrogen core-shell molecular sieve.
- Type molecular sieve
- the carrier may contain various carriers conventionally used in catalytic cracking catalysts in addition to silica sol and modifying elements, and the present application does not specifically limit it.
- the carrier may also include a natural clay/alumina carrier, a natural clay/alumina/silica carrier (a silica carrier other than the silica sol), and the alumina carrier may be, for example, alumina sol and/ Or pseudo-boehmite.
- the amount of silica sol added is such that the content of silica sol in the obtained catalyst is 1-15% by weight on a dry basis.
- the first slurry described in step iv) includes silica sol, modified element compound, and optionally one or more of clay, aluminum sol, and pseudo-boehmite.
- the pseudo-boehmite is acidified with an acid, and then mixed with silica sol, aluminum sol, modified element compound, and clay to obtain the first slurry.
- the modified element compound is first mixed with the silica sol to form a modified silica sol, and then introduced into the first slurry.
- the modifying element compound is, for example, a rare earth salt.
- the rare earth salt is first added to the silica sol to obtain the rare earth modified silica sol, and then mixed with other materials, such as core-shell molecular sieves, other carriers, and water for beating.
- the core-shell molecular sieve is mixed with the modified silica sol to form a second slurry, and then the second slurry is mixed with other carriers, such as acidified pseudo-boehmite, alumina sol, clay, and optionally water A first slurry is formed.
- the rare earth element includes lanthanum and/or cerium, wherein the amount of lanthanum and/or cerium is more than 50% by weight of the total amount of rare earths.
- the rare earth salt may be rare earth chloride and/or rare earth nitrate.
- the silica sol may be one or more of neutral silica sol, acid silica sol or alkaline silica sol.
- the amount of rare earth salt is such that the content of rare earth oxide in the carrier is 1-15% by weight based on RE 2 O 3.
- the solid content of the first slurry obtained in step iv) is generally 10-50% by weight, preferably 15-30% by weight.
- the spray drying conditions in step iv) may be the conditions commonly used in the preparation process of the catalytic cracking catalyst.
- the spray drying temperature is 100-350°C, preferably 200-300°C.
- the catalyst obtained by spray drying can also be exchanged and washed, and can be exchanged and washed with an ammonium salt solution.
- the exchange washing makes the Na 2 O content in the obtained catalyst less than 0.15% by weight.
- the catalyst after exchange and washing can be dried.
- the preparation method of the catalyst may further include a roasting step after step iv), and the roasting may be carried out before the exchange washing and/or after the exchange washing.
- the calcination can use a conventional calcination method, for example, the calcination temperature is 400-650°C, and the calcination time is 2-10 hours. In one embodiment, the calcination is performed at 450-580°C for 2-6 hours.
- the step iv) further includes: A) preparing a rare earth modified carrier; the rare earth may be in all the carriers or part of the carrier, for example, in silicon In one or more of sol, clay, pseudo-boehmite, or aluminum sol; for example, rare earth can be introduced to modify part of the carrier, such as clay, by an equal volume impregnation method.
- rare earth salt to silica sol, aluminum sol or pseudo-boehmite slurry to obtain modified silica sol, modified aluminum sol or modified pseudo-boehmite, and then Is added to the first slurry; preferably, the rare earth salt is added to the silica sol; and B) the rare earth modified carrier, optionally the carrier not modified by the modifying element, and the core-shell molecular sieve, Water mixing, beating, spray drying.
- step iv) further includes:
- the preparation method of the catalyst further includes: v) calcining the catalyst obtained in step iv) at 450-580°C for 2-6 hours; and vi) performing ammonium exchange washing on the calcined catalyst to make the catalyst
- the Na 2 O content is less than 0.15% by weight.
- this application also provides a catalyst prepared according to the catalyst preparation method.
- the catalyst of the first type of embodiment of the present application when used in the hydrogenation of VGO catalytic cracking, compared with the existing catalyst, it can produce more heavy oil, and has a higher ethylene yield and propylene yield.
- C3 /C3 0 >8.
- the second embodiment of the catalyst of the present application is a catalytic cracking catalyst for hydrogenating LCO to produce low-carbon olefins.
- the catalyst contains 50-85% by weight of the carrier, 10-35% by weight, preferably 10-25% by weight on a dry basis.
- Weight% of the core-shell molecular sieve according to the present application 5-15% by weight, preferably 8-12% by weight, of the molecular sieve with a pore opening diameter of 0.65-0.70 nanometers (also referred to as the second molecular sieve).
- the carrier in the catalyst may be a carrier conventionally used in catalytic cracking catalysts.
- the carrier may include clay, alumina carrier, silica carrier, and silica- One or more of alumina carrier and phosphor-aluminum glue; optionally, the carrier may include additives such as phosphorous oxides and alkaline earth metal oxides.
- the carrier is clay and alumina carrier, or clay, alumina carrier and silica carrier.
- the carrier includes a silica carrier.
- the silica carrier is, for example, a solid silica gel carrier and/or a silica sol carrier, more preferably a silica sol carrier.
- the content of the silica support in the catalyst is 0-15% by weight based on SiO 2 , for example, 1-15% by weight or 10-15% by weight or 5-15% by weight.
- the catalyst includes 15-40% by weight of core-shell molecular sieve, 35-50% by weight of clay, and 10-30% by weight of acidified pseudo-thin Diaspore (pseudo-boehmite for short), 5-15% by weight alumina sol and 0-15% by weight, for example 5-15% by weight silica sol.
- the catalyst of the second type of embodiment of the present application can be prepared by a method including the following steps: forming a first slurry including the core-shell molecular sieve according to the present application, a second molecular sieve, a carrier, and water, and spray drying, wherein the first slurry
- the second molecular sieve is a molecular sieve with a pore opening diameter of 0.65-0.70 nanometers.
- the core-shell molecular sieve when the core-shell molecular sieve is a sodium core-shell molecular sieve, the core-shell molecular sieve may be subjected to ammonium exchange first, and then be beaten with the second molecular sieve, the carrier and water.
- the preparation method of the catalyst of the second embodiment includes the following steps:
- step iii) Dry the core-shell molecular sieve obtained in step ii) and calcinate at 400-600°C for 2-10 hours to obtain a hydrogen core-shell molecular sieve;
- step iv) The hydrogen core-shell molecular sieve obtained in step iii), the molecular sieve with a pore opening diameter of 0.65-0.70 nanometers, the carrier and water are beaten to obtain the first slurry, which is spray-dried and optionally calcined to obtain the catalyst.
- the molecular sieve is contacted with the ammonium salt solution for exchange at 50-100°C, and then filtered.
- the ammonium exchange process is performed once or more than twice; the ammonium salt is selected from one or more of ammonium chloride, ammonium sulfate, and ammonium nitrate.
- the ammonium salt is selected from one or more of ammonium chloride, ammonium sulfate, and ammonium nitrate.
- kind of mixture is possible.
- the carrier may be a carrier commonly used in catalytic cracking catalysts.
- the carrier includes one or more of clay, alumina carrier, silica carrier, phosphoalumina, and silica alumina carrier.
- the weight ratio of the core-shell molecular sieve to the carrier is 15-50:50-85, for example, 25-45:55-75 on a dry basis.
- the solid content of the slurry containing the core-shell molecular sieve and the carrier is generally 10-50% by weight, preferably 15-30% by weight.
- the carrier includes clay and a carrier with a binding function.
- the carrier with a binding function may be, for example, one or more of silica carrier, alumina carrier, and phosphor-alumina gel.
- the silica carrier is, for example, silica sol
- the alumina carrier is, for example, aluminum.
- Sol and/or acidified pseudo-boehmite Further preferably, the carrier with binding function includes one or more of acidified pseudo-boehmite, alumina sol and silica sol.
- the carrier with bonding function may include aluminum sol and/or acidified pseudo-boehmite; or the carrier with bonding function may include silica sol, and optionally aluminum sol and/or acidified pseudo-boehmite.
- Bauxite the amount of silica sol added is such that the silica sol-derived silica content ( calculated as SiO 2 ) in the resulting catalyst is 1-15% by weight.
- the core-shell molecular sieve the second molecular sieve: the clay:
- the weight ratio of alumina sol: acidified pseudo-boehmite: silica sol is (15-40): (5-15): (35-50): (5-15): (10-30): (0-15) .
- the second molecular sieve that is, the molecular sieve with a channel opening diameter of 0.65-0.70 nanometers, is selected from the group consisting of AET, AFR, AFS, AFI, BEA, BOG, CFI, Molecular sieves of CON, GME, IFR, ISV, LTL, MEI, MOR, OFF and SAO structures or their combination. It is preferably Beta, SAPO-5, SAPO-40, SSZ-13, CIT-1, ITQ-7, ZSM-18, mordenite and chabazite or a combination thereof.
- the second molecular sieve is a ⁇ molecular sieve
- the ⁇ molecular sieve is preferably an H ⁇ molecular sieve
- its silicon-to-aluminum ratio SiO 2 /Al 2 O 3 molar ratio
- the slurry including the core-shell molecular sieve, the second molecular sieve, the carrier, and water may further contain additives.
- the additives can be added to part of the carrier, or added to the entire carrier, and can also be added to the first slurry formed by the core-shell molecular sieve, the second molecular sieve, and the slurry of the carrier and water.
- the additives such as phosphorus oxide additives and metal oxide additives; the metal oxide additives, such as alkaline earth metal oxides or one or more of their precursors.
- step iv) includes: oxidizing the core-shell molecular sieve, the second molecular sieve, clay, silica binder and/or alumina binder, and optionally inorganic oxidation
- the substrate and water are mixed and slurried to form a slurry, and the solid content of the slurry formed by beating is generally 10-50% by weight, preferably 15-30% by weight; then spray drying, optionally roasting, to obtain the catalyst.
- the spray drying conditions may be spray drying conditions commonly used in the preparation process of the catalytic cracking catalyst. Generally, the spray drying temperature can be 100-350°C, preferably 150-300°C, for example 200-300°C. When the carrier contains additives, the additives can be added to the slurry before drying, or introduced after drying, for example, by dipping.
- the firing conditions firing temperature, for example, 550°C, firing time, for example, 6h.
- an ion exchange step may also be included.
- the exchange is such that the sodium oxide content in the obtained catalytic cracking catalyst does not exceed 0.15% by weight.
- An ammonium salt solution can be used for the exchange.
- it also includes a washing step to wash away the sodium ions exchanged from the catalyst, which can be washed with water, for example, with deionized water, distilled water or deionized water.
- a roasting step may be further included, and the roasting may be performed before or after the ion exchange described above.
- the roasting method can adopt the prior art roasting method, preferably, the roasting temperature is 400-600°C, and the roasting time is 2-6 hours.
- this application also provides a catalyst prepared according to the catalyst preparation method.
- the catalyst according to the second type of embodiment of the present application has excellent hydrogenation LCO cracking ability and higher yield of low-carbon olefins, and is used for the conversion of hydrogenated LCO, and can have a higher conversion rate and a higher yield of low-carbon olefins .
- the third embodiment of the catalyst of the present application is a catalytic cracking catalyst, which contains 30-83% by weight, preferably 55-75% by weight of the carrier, on a dry basis weight basis and based on the weight of the composition. 2-20% by weight, preferably 8-15% by weight of the ZSM-5/ ⁇ core-shell molecular sieve according to the present application and 15-50% by weight, preferably 25-35% by weight of the Y-type molecular sieve.
- the support may be one or more of clay, silica support and alumina support.
- the carrier includes one or more of alumina sol, pseudo-boehmite, silica sol and clay.
- the catalyst contains a silica sol carrier and other carriers, and the silica sol carrier content based on SiO 2 is 1-15% by weight, for example, 5-15% by weight.
- the other carrier includes one or more of aluminum sol, pseudo-boehmite and clay.
- the Y-type molecular sieve may contain or contain rare earths, and contain or contain phosphorus.
- the rare earth content in the Y-type molecular sieve is 0-25% by weight based on RE 2 O 3
- the phosphorus content can be 0-10% by weight based on P 2 O 5.
- the Y-type molecular sieve for example, can be HY molecular sieve, REY molecular sieve, REHY molecular sieve, DASY molecular sieve, DASY molecular sieve containing rare earth, USY molecular sieve, USY molecular sieve containing rare earth, DASY molecular sieve containing phosphorus and rare earth, phosphorus and rare earth containing One or more of USY molecular sieve, PSRY molecular sieve, PSRY molecular sieve containing rare earth, HRY molecular sieve containing rare earth, and HRY molecular sieve.
- the catalyst according to the third embodiment of the present application can be used for the conversion of heavy oil to produce low-carbon olefins, and can achieve higher conversion rate of heavy oil, higher yields of ethylene, propylene and butene, and higher liquefied gas Yield.
- the catalyst of the third type of embodiment of the present application can be prepared by a method including the steps of forming a first slurry including the core-shell molecular sieve according to the present application, a Y-type molecular sieve, a carrier, and water, and spray drying.
- the preparation method of the catalyst of the third type of embodiment includes the following steps:
- step ii) Perform ammonium exchange on the sodium core-shell molecular sieve obtained in step i) so that the Na 2 O content in the core-shell molecular sieve is less than 0.15% by weight;
- step iii) Dry the core-shell molecular sieve obtained in step ii) and calcinate at 400-600°C for 2-10 hours to obtain a hydrogen core-shell molecular sieve;
- step iv) forming a first slurry comprising the hydrogen core-shell molecular sieve, Y molecular sieve, carrier and water obtained in step iii), and spray drying to obtain the catalyst.
- the solid content of the first slurry formed in step iv) is generally 10-50% by weight, preferably 15-30% by weight.
- the spray drying described in step iv) can adopt a conventional spray drying method, and the spray drying conditions are the drying conditions commonly used in the preparation process of the catalytic cracking catalyst.
- the spray drying temperature is 100-350°C, preferably 200-300°C.
- the spray drying in step iv) obtains microsphere particles, which can be used directly as a catalytic cracking catalyst, or can be further subjected to exchange washing and drying.
- an ammonium salt solution can be used for exchange washing.
- the exchange washing is such that the Na 2 O content in the obtained catalytic cracking catalyst is less than 0.15% by weight.
- the catalyst after exchange and washing can be dried.
- step iv) may further include a roasting step after spray drying, and the roasting may be performed before the exchange washing and/or after the exchange washing.
- the calcination can adopt a conventional calcination method, for example, the calcination temperature is 400-600°C, the calcination time is 2-10 hours, such as 2-4 hours, preferably, the calcination is at 450-580°C for 2-6 hours.
- the present application also provides a catalyst prepared according to the catalyst preparation method.
- the fourth embodiment of the catalyst of the present application is an intermediate base crude oil catalytic cracking catalyst. On a dry basis, it contains 50-79 wt% of the carrier and 15-35 wt% of the ZSM-5/ ⁇ according to the present application.
- Core-shell molecular sieve 5-10% by weight of Y-type molecular sieve, 1-5% by weight of molecular sieve with pore opening diameter of 0.65-0.70 nanometers.
- the Y-type molecular sieve is a Y-type molecular sieve that does not contain rare earths or a Y-type molecular sieve with a low rare-earth content.
- the content is less than 5% by weight based on RE 2 O 3
- the silicon-to-aluminum ratio (SiO 2 /Al 2 O 3 molar ratio) of the Y-type molecular sieve is, for example, 4-18 or 4.5-15.
- the Y-type molecular sieve for example, one or more of DASY molecular sieve, DASY molecular sieve containing rare earth, HRY molecular sieve, HRY molecular sieve containing rare earth, DOSY molecular sieve, USY molecular sieve, USY molecular sieve containing rare earth, HY molecular sieve, REHY molecular sieve , Preferably one or more of HY molecular sieve, DASY molecular sieve and USY molecular sieve.
- the molecular sieve with a pore opening diameter of 0.65-0.70 nanometers can be, for example, AET, AFR, AFS, AFI, BEA, BOG, CFI, CON, GME, IFR, ISV, One or more of molecular sieves with LTL, MEI, MOR, OFF and SAO structures; preferably Beta, SAPO-5, SAPO-40, SSZ-13, CIT-1, ITQ-7, ZSM-18, mordenite And chabazite or a combination thereof, more preferably ⁇ molecular sieve, for example, it may be hydrogen type ⁇ molecular sieve.
- the carrier may be a carrier conventionally used in catalytic cracking catalysts, for example, an alumina sol carrier, a zirconium sol carrier, a pseudo-boehmite carrier, a silica sol, and a clay carrier.
- a carrier conventionally used in catalytic cracking catalysts for example, an alumina sol carrier, a zirconium sol carrier, a pseudo-boehmite carrier, a silica sol, and a clay carrier.
- a carrier conventionally used in catalytic cracking catalysts for example, an alumina sol carrier, a zirconium sol carrier, a pseudo-boehmite carrier, a silica sol, and a clay carrier.
- the catalyst preferably, on a dry basis weight and based on the weight of the catalyst, contains 50-79% by weight, preferably 55-75% by weight of the carrier; 15 -35% by weight, preferably 20-30% by weight of core-shell molecular sieve; 5-10% by weight of Y-type molecular sieve and 1-5% by weight of molecular sieve with pore opening diameter of 0.65-0.70 nanometers.
- the catalyst according to the fourth type of embodiment of the present application has a richer pore structure, a more excellent intermediate base crude oil cracking ability and a higher yield of low-carbon olefins.
- the catalyst of the fourth type of embodiment of the present application can be prepared by a method including the following steps: forming a core-shell molecular sieve according to the present application, a Y-type molecular sieve, a molecular sieve with a pore opening diameter of 0.65-0.70 nanometers, a carrier, and water. A slurry, and spray drying.
- the preparation method of the catalyst of the fourth embodiment includes the following steps:
- step ii) Perform ammonium exchange on the sodium core-shell molecular sieve obtained in step i) so that the Na 2 O content in the core-shell molecular sieve is less than 0.15% by weight;
- step iii) Dry the core-shell molecular sieve obtained in step ii) and calcinate at 350-600°C for 2-6 hours to obtain a hydrogen core-shell molecular sieve;
- step iv) forming a first slurry comprising the hydrogen core-shell molecular sieve obtained in step iii), a Y molecular sieve, a molecular sieve with a pore opening diameter of 0.65-0.70 nanometers, a carrier, and water, and spray drying to obtain the catalyst.
- the carrier mentioned in step iv) may be one or more of clay, alumina carrier, and silica carrier.
- the alumina carrier is, for example, one or more of pseudo-boehmite and aluminum sol, wherein the pseudo-boehmite is preferably acidified and then mixed with other components.
- the silica carrier is one or more of neutral silica sol, acid silica sol or alkaline silica sol; preferably, the silica sol content in the catalyst is 1-15 weight based on SiO 2 %.
- the solid content of the first slurry formed in step iv) is generally 10-50% by weight, preferably 15-30% by weight.
- the spray drying conditions in step iv) may be drying conditions commonly used in the preparation process of the catalytic cracking catalyst.
- the spray drying temperature is 100-350°C, preferably 200-300°C.
- the catalyst obtained by spray drying in step iv) may also be exchange-washed, for example, it may be exchange-washed with an ammonium salt solution.
- the exchange washing makes the Na 2 O content in the obtained catalytic cracking catalyst less than 0.15% by weight. The catalyst after exchange and washing can be dried.
- the preparation method of the catalyst may further include a calcination step after step iv), and the calcination may be performed before the above-mentioned exchange washing and/or after the exchange washing.
- the calcination can adopt a conventional calcination method, for example, the calcination temperature is 350-650°C, the calcination time is 1-4 hours, preferably, the calcination is at 400-600°C for 2-6 hours.
- the spray drying in step iv) obtains catalyst microspheres; the catalyst microspheres can be directly used as a catalytic cracking catalyst.
- the preparation method of the catalyst may further include:
- step iv) calcining the catalyst microspheres obtained in step iv) at 400-600°C for 2-6 hours;
- step v) The catalyst calcined in step v) is subjected to ammonium exchange washing, so that the Na 2 O content in the catalyst is less than 0.15% by weight.
- this application also provides a catalyst prepared according to the catalyst preparation method.
- the heavy oil cracking ability is stronger, the yield of low-carbon olefins is higher, and the yield of liquefied gas is higher.
- the present application provides a method for catalytic conversion of hydrocarbon oil, including the step of contacting and reacting a hydrocarbon oil feedstock with the catalyst according to the present application.
- the method is used for the catalytic cracking of hydrogenated VGO, and includes the step of contacting and reacting the hydrogenated VGO with the catalyst according to the first embodiment of the present application.
- reaction conditions of the method for hydrogenating VGO catalytic cracking include: a reaction temperature of 500-550°C, preferably 510-540°C, a weight hourly space velocity of 5-30 hours -1 , preferably 8-20 Hour -1 , the ratio of agent to oil is 1-15, preferably 2-12.
- the method for hydrogenated VGO catalytic cracking can have a higher fuel oil yield than the existing hydrogenated VGO conversion method, and at the same time can produce more low-carbon olefins, with higher ethylene and Propylene yield.
- the performance of the obtained heavy oil can meet the requirements of low-sulfur marine fuel standards, and the obtained heavy oil can be used as low-sulfur heavy marine fuel or a blending component of marine fuel.
- C3 (propylene)/C3 0 (propane)>8.
- the method is used for the catalytic cracking of hydrogenated LCO, including the step of contacting and reacting the hydrogenated LCO with the catalyst according to the second embodiment of the present application.
- the hydrogenation method used for the catalytic cracking LCO comprising: a reaction temperature of 550-620 deg.] C, preferably 560-600 deg.] C; weight hourly space velocity 5-30h -1, preferably 8-20h - 1 ;
- the ratio of agent to oil is 1-15, preferably 2-12.
- the method is used for the catalytic cracking of heavy oil, including the step of contacting the heavy oil feedstock with the catalyst according to the third embodiment of the present application under catalytic cracking conditions.
- the catalytic cracking conditions include: a reaction temperature of 450-600°C, preferably 500-550°C; a weight hourly space velocity of 5-30 hours-1, preferably 8-20 hours-1; a catalyst-oil ratio of 1 15, preferably 2-12.
- the method is used for the catalytic cracking of intermediate base crude oil to produce low-carbon olefins, including the step of contacting and reacting the intermediate base crude oil with the catalyst according to the fourth embodiment of the present application.
- the reaction conditions of the method for producing low-carbon olefins by catalytic cracking of intermediate base crude oil may be conventional reaction conditions of heavy oil catalytic cracking.
- the reaction conditions include: a reaction temperature of 550-620°C, for example, 560-600°C,
- the weight hourly space velocity is 0.5-30 h -1 , preferably 1-20, and the agent-to-oil ratio is 1-15, preferably 2-12.
- this application provides the following technical solutions:
- a ZSM-5/ ⁇ core-shell molecular sieve characterized in that:
- the ZSM-5/ ⁇ core-shell molecular sieve according to item A1 wherein the total specific surface area of the ZSM-5/ ⁇ core-shell molecular sieve is greater than 420 m 2 /g, such as 450-620 or 490-580 m 2 /g, the ratio of the mesopore surface area to the total surface area is preferably 10-40%, for example 12-35%.
- the ZSM-5/ ⁇ core-shell molecular sieve according to item A1, wherein the average crystal grain size of the shell molecular sieve of the ZSM-5/ ⁇ core-shell molecular sieve is 10-500 nm, for example, 50-500 nm.
- the ZSM-5/ ⁇ core-shell molecular sieve according to item A1, wherein the average crystal grain size of the core-phase molecular sieve of the ZSM-5/ ⁇ core-shell molecular sieve is 0.05-15 ⁇ m, preferably 0.1-10 ⁇ m .
- the pore volume of pores with a diameter of 20-80 nm accounts for 5-40% of the total pore volume.
- a method for synthesizing ZSM-5/ ⁇ core-shell molecular sieve including the following steps:
- step 1) The method according to item A15, wherein the contact in step 1) is carried out by adding ZSM-5 molecular sieve to a surfactant solution with a concentration of 0.05-50% by weight and contacting for at least 0.5h , Filtered and dried to obtain ZSM-5 molecular sieve material I.
- A17 The method according to item A15 or A16, wherein, in the contact in step 1), the contact time is 1-36 h, and the contact temperature is 20-70°C.
- the surfactant solution further contains a salt, and the concentration of the salt in the surfactant solution is 0.05-10.0% by weight; the salt is, for example, selected from Sodium chloride, potassium chloride, ammonium chloride, ammonium nitrate, or a combination thereof.
- A20 The method according to item A15, wherein the surfactant is selected from polymethylmethacrylate, polydiallyldimethylammonium chloride, dipicolinic acid, ammonia, ethylamine, n-butyl Amine, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetraethylammonium bromide, tetrapropylammonium bromide, tetrabutylammonium hydroxide, or a combination thereof.
- the surfactant is selected from polymethylmethacrylate, polydiallyldimethylammonium chloride, dipicolinic acid, ammonia, ethylamine, n-butyl Amine, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetraethylammonium bromide, tetrapropylammonium bromid
- step 1 The method according to item A15, wherein the ZSM-5 molecular sieve in step 1) is a sodium-type, hydrogen-type or ion-exchanged ZSM-5 molecular sieve.
- step 1 The method according to item A15 or A16, wherein the molar ratio of silicon to aluminum of the ZSM-5 molecular sieve in step 1) is 10- ⁇ in terms of SiO 2 /Al 2 O 3 ; for example, in step 1) the ZSM- 5 The molar ratio of silicon to aluminum of the molecular sieve is 30-200 in terms of SiO 2 /Al 2 O 3.
- step 1) the average crystal grain size of the ZSM-5 molecular sieve is 0.05-20 ⁇ m; for example, in step 1) the average crystal grain size of the ZSM-5 molecular sieve is 0.1-10 ⁇ m;
- the average particle size of the ZSM-5 molecular sieve is preferably 0.1-30 ⁇ m.
- the method according to item A15, wherein the contacting in step 2) comprises: adding ZSM-5 molecular sieve material I to the slurry containing ⁇ molecular sieve, stirring at 20-60°C for at least 0.5 hours, and then filtering , Dry to obtain ZSM-5 molecular sieve material II.
- step 2 The method according to item A15 or A25, wherein in step 2), the weight ratio of the ⁇ molecular sieve-containing slurry to the ZSM-5 molecular sieve material I on a dry basis is 10-50:1.
- step 2 the average crystal grain size of the ⁇ molecular sieve is 0.01-0.5 ⁇ m, for example, 0.05-0.5 ⁇ m; the average of the ⁇ molecular sieve
- the particle size is preferably 0.01-0.5 ⁇ m.
- the silicon source is selected from the group consisting of ethyl orthosilicate, water glass, coarse-pored silica gel, silica sol, white carbon black, activated clay, or their Combination
- the aluminum source is selected from aluminum sulfate, aluminum isopropoxide, aluminum nitrate, aluminum sol, sodium metaaluminate, ⁇ -alumina, or combinations thereof
- the template is selected from tetraethylammonium fluoride, four Ethylammonium hydroxide, tetraethylammonium bromide, tetraethylammonium chloride, polyvinyl alcohol, triethanolamine, or sodium carboxymethylcellulose, or a combination thereof.
- step 3 The method according to item A15, wherein in step 3), the silicon source, aluminum source, template agent, and deionized water are mixed to form a synthetic solution, which is then crystallized at 75-250°C for 10-80h , To obtain the pre-crystallized synthetic solution III.
- A32 The method according to item A31, wherein the crystallization in step 3): the crystallization temperature is 80-180°C, and the crystallization time is 18 hours-50 hours.
- step 4 the ZSM-5 molecular sieve material II is mixed with the pre-crystallized synthetic solution III, and the pre-crystallized synthetic solution III is mixed with ZSM-5 on a dry basis.
- the weight ratio of the molecular sieve material II is 2-10:1, for example 4-10:1.
- A36 The method according to item A15, wherein the crystallization in step 4): the crystallization temperature is 100-250°C, and the crystallization time is 30-350h, for example, the crystallization in step 4): crystallization The temperature is 100-200°C, and the crystallization time is 50-120h.
- the ZSM-5/ ⁇ core-shell molecular sieve obtained by the method for synthesizing the ZSM-5/ ⁇ core-shell molecular sieve according to any one of items A12-A36.
- the catalyst according to item B1 wherein the content of the carrier on a dry basis in the catalyst is 50-90% by weight, for example 60-85% by weight, and the content of the core-shell molecular sieve on a dry basis is 10-50% by weight, for example 15-40% by weight, and the silica sol content on a dry basis is 1-15% by weight, for example 5-15% by weight.
- the catalyst according to item B3 wherein, on a dry basis, the content of silica sol in the catalyst is 1-15% by weight, the content of pseudo-boehmite is 5-25% by weight, and the content of aluminum sol is The content is 3-20% by weight, and the clay content is 25-50% by weight; preferably, based on the dry basis weight of the carrier, the content of rare earth oxides in the carrier is 0.1-15 weight based on RE 2 O 3 %.
- the catalyst according to item B1 wherein the total specific surface area of the core-shell molecular sieve is greater than 420 m 2 /g, for example, 4490-580 m 2 /g, and the mesopore surface area of the core-shell molecular sieve accounts for the total surface area
- the ratio is preferably 10-40%.
- a method for preparing a catalytic cracking catalyst comprising: forming a first slurry comprising silica sol, a compound of modified elements, and a core-shell molecular sieve, and spray drying; wherein the modified element is a rare earth element.
- Sodium core-shell molecular sieve ammonium exchange makes the content of Na 2 O in the core-shell molecular sieve less than 0.15% by weight;
- step 1) is carried out by adding ZSM-5 molecular sieve to a surfactant solution with a concentration of 0.05-50% by weight and contacting for at least 0.5h , Filter and dry to obtain ZSM-5 molecular sieve material I, the contact time is 1-36h, and the contact temperature is 20-70°C.
- the surfactant is selected from polymethylmethacrylate, polydiallyldimethylammonium chloride, dipicolinic acid, ammonia, ethylamine, n-butyl Amine, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetraethylammonium bromide, tetrapropylammonium bromide, tetrabutylammonium hydroxide, or a combination thereof.
- step 1) the molar ratio of silicon to aluminum of the ZSM-5 molecular sieve is 10- ⁇ in terms of SiO 2 /Al 2 O 3 , and the average crystal grain size of the ZSM-5 molecular sieve is 0.05 -20 ⁇ m.
- the method according to item B16, wherein the contact in step 2) comprises: adding ZSM-5 molecular sieve material I to the slurry containing ⁇ molecular sieve, stirring at 20-60°C for at least 0.5 hours, and then filtering , Dry to obtain ZSM-5 molecular sieve material II, the concentration of ⁇ molecular sieve in the ⁇ molecular sieve-containing slurry is 0.1-10% by weight, for example, 0.3-8% by weight, the slurry containing ⁇ molecular sieve and ZSM- 5
- the weight ratio of molecular sieve material I is 10-50:1.
- the silicon source is selected from the group consisting of tetraethyl orthosilicate, water glass, white carbon black, coarse-pored silica gel, silica sol, activated clay, or a combination thereof;
- the aluminum source is selected from aluminum sulfate, aluminum isopropoxide, sodium metaaluminate, aluminum nitrate, aluminum sol, or ⁇ -alumina or a combination thereof;
- the template is tetraethylammonium fluoride, tetraethyl chloride One or more of ammonium chloride, tetraethylammonium bromide, polyvinyl alcohol, tetraethylammonium hydroxide, triethanolamine, or sodium carboxymethyl cellulose.
- step 3 The method according to item B16, wherein in step 3), the silicon source, aluminum source, template agent, and deionized water are mixed to form a synthetic solution, which is then crystallized at 75-250°C for 10-80h , To obtain the pre-crystallized synthetic solution III.
- ammonium salt is selected from a mixture of one or more of ammonium chloride, ammonium sulfate, and ammonium nitrate.
- the first slurry includes silica sol, modified element compound and core-shell molecular sieve, and optionally includes one of clay, aluminum sol, and pseudo-boehmite One or more; preferably, the pseudo-boehmite is added after acidification with acid.
- the modified element compound is a rare earth salt
- the rare earth salt is chlorine Rare earth or rare earth nitrate; preferably, the rare earth salt is first added to the silica sol to obtain the rare earth modified silica sol.
- the rare earth elements include lanthanum and/or cerium, wherein the amount of lanthanum and/or cerium is more than 50% by weight of the total amount of rare earths.
- a hydrogenated VGO catalytic cracking method comprising the step of contacting and reacting the hydrogenated VGO with any one of items B1-B14 or the catalytic cracking catalyst described in item B33.
- the core-shell type molecular sieve core phase is ZSM-5 molecular sieve, the shell layer is ⁇ molecular sieve;
- the second molecular sieve is a molecular sieve with a pore opening diameter of 0.65-0.70 nanometers.
- the catalytic cracking catalyst according to item C1 wherein the total specific surface area of the core-shell molecular sieve is greater than 420 m 2 /g, such as 450-620 or 490-580 m 2 /g, and the mesopore surface area accounts for the proportion of the total surface area.
- the ratio is preferably 10-40%, for example 12-35%.
- the catalytic cracking catalyst according to item C1 wherein the molar ratio of silicon to aluminum of the shell molecular sieve of the shell-core-shell molecular sieve is 10-500, such as 25-200, in terms of SiO 2 /Al 2 O 3.
- the catalytic cracking catalyst according to item C1 wherein the thickness of the shell layer of the core-shell molecular sieve is 10-2000 nm, for example, 50-2000 nm.
- the catalytic cracking catalyst according to item C1 wherein the support includes one or more of clay, silica support, alumina support, and phosphoalumina gel, and the support optionally contains additives. , Such as phosphorus oxides, alkaline earth metal oxides.
- a method for preparing a catalytic cracking catalyst including the following steps:
- a slurry comprising a core-shell molecular sieve, a second molecular sieve, a carrier, and water is formed, and spray dried; the second molecular sieve is a molecular sieve with a pore opening diameter of 0.65-0.70 nanometers.
- step 1) is carried out by adding ZSM-5 molecular sieve to a surfactant solution with a concentration of 0.05-50% by weight to contact at least After 0.5h, filter and dry to obtain ZSM-5 molecular sieve material I, the contact time is 1-36h, and the contact temperature is 20-70°C.
- the surfactant is selected from polymethylmethacrylate, polydiallyldimethylammonium chloride, dipicolinic acid, ammonia, ethylamine, n-butyl Amine, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetraethylammonium bromide, tetrapropylammonium bromide, tetrabutylammonium hydroxide, or a combination thereof.
- step 1) the molar ratio of silicon to aluminum of the ZSM-5 molecular sieve is 10- ⁇ in terms of SiO 2 /Al 2 O 3 , and the average crystallinity of the ZSM-5 molecular sieve is The particle size is 0.05-20 ⁇ m.
- step 2 comprises: adding ZSM-5 molecular sieve material I to a slurry containing ⁇ molecular sieve, and stirring at 20-60°C for at least 0.5 hours, Then it is filtered and dried to obtain ZSM-5 molecular sieve material II.
- concentration of ⁇ molecular sieve in the ⁇ molecular sieve-containing slurry is 0.1-10% by weight, for example, 0.3-8% by weight.
- the weight ratio of ZSM-5 molecular sieve material I is 10-50:1.
- the silicon source is selected from the group consisting of ethyl orthosilicate, water glass, coarse-pored silica gel, silica sol, white carbon black, activated clay or their Combination
- the aluminum source is selected from aluminum sulfate, aluminum isopropoxide, aluminum nitrate, aluminum sol, sodium metaaluminate, ⁇ -alumina, or combinations thereof
- the template is selected from tetraethylammonium fluoride, four Ethylammonium hydroxide, tetraethylammonium bromide, tetraethylammonium chloride, polyvinyl alcohol, triethanolamine, or sodium carboxymethylcellulose, or a combination thereof.
- step 3 The method according to item C16, characterized in that in step 3), the silicon source, aluminum source, template agent, and deionized water are mixed to form a synthetic solution, which is then crystallized at 75-250°C. -80h to obtain the pre-crystallized synthetic solution III.
- step 3 The method according to item C16, characterized in that the crystallization in step 3): the crystallization temperature is 80-180°C, and the crystallization time is 18 hours-50 hours.
- the crystallization in step 4) the crystallization temperature is 100-250°C, and the crystallization time is 30-350h, for example, the crystallization in step 4): The crystallization temperature is 100-200°C, and the crystallization time is 50-120h.
- the weight ratio of) makes the core-shell molecular sieve and the ammonium salt solution contact at 50-100°C for exchange and filtration, and the ammonium exchange process is performed once or more than twice;
- the ammonium salt is selected from ammonium chloride, ammonium sulfate, nitric acid One or a mixture of several kinds of ammonium;
- the roasting in step (S2) the roasting temperature is 400-600°C, and the roasting time is 2-10h.
- the carrier is, for example, a clay and alumina carrier, or a clay, a silica carrier and an optional alumina carrier; preferably, the carrier includes an oxide carrier
- the silicon carrier the content of the silicon oxide carrier based on SiO 2 is 1-15% by weight, and the silicon oxide carrier is one or more of neutral silica sol, acidic silica sol or alkaline silica sol.
- a hydrogenated LCO catalytic cracking method comprising the step of contacting and reacting the hydrogenated LCO with any one of items C1-C14 or the catalytic cracking catalyst described in item C31.
- An application method of core-shell molecular sieve including:
- (1) Decrease the sodium oxide content of the core-shell molecular sieve, optionally calcining, to obtain a modified core-shell molecular sieve;
- the core-shell molecular sieve has a core phase of ZSM-5 molecular sieve and a shell layer of ⁇ molecular sieve;
- a method for preparing a catalytic cracking catalyst including:
- step 1) is carried out by adding ZSM-5 molecular sieve to a surfactant solution with a concentration of 0.05-50% by weight and contacting for at least 0.5h , Filter and dry to obtain ZSM-5 molecular sieve material I, the contact time is 1-36h, and the contact temperature is 20-70°C.
- step 1) the molar ratio of silicon to aluminum of the ZSM-5 molecular sieve is 10- ⁇ in terms of SiO 2 /Al 2 O 3 , and the average crystal grain size of the ZSM-5 molecular sieve is 0.05 -20 ⁇ m.
- step 2 comprises: adding ZSM-5 molecular sieve material I to the slurry containing ⁇ molecular sieve, stirring at 20-60°C for at least 0.5 hours, and then filtering , Dry to obtain ZSM-5 molecular sieve material II, the weight ratio of the ⁇ -molecular sieve-containing slurry to the ZSM-5 molecular sieve material I on a dry basis is 10-50:1, and the ⁇ -molecular sieve-containing slurry
- concentration of ⁇ molecular sieve is 0.1-10% by weight, for example 0.3-8% by weight.
- step 3 the surfactant in step 1) is selected from ammonia, polymethylmethacrylate, n-butylamine, polydiallyldimethylammonium chloride, dipyridine Carboxylic acid, ethylamine, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetraethylammonium bromide, tetrapropylammonium bromide, tetrabutylammonium hydroxide or a combination thereof; in step 3), the The silicon source is selected from one or more of water glass, silica sol, coarse-pored silica gel, ethyl orthosilicate, white carbon black or activated clay; the aluminum source is selected from aluminum sulfate, aluminum nitrate, aluminum isopropoxide , Aluminum sol, sodium metaaluminate, ⁇ -alumina or a combination thereof; the template is tetraethy
- step 3 the silicon source, aluminum source, template agent, and deionized water are mixed to form a synthetic solution, which is then crystallized at 75-250°C for 10-80h , To obtain the pre-crystallized synthetic solution III.
- the crystallization temperature is 100-250°C, and the crystallization time is 30-350h; preferably, the crystallization in step 4): The crystallization temperature is 100-200°C, and the crystallization time is 50-120h.
- the catalyst according to item D29 wherein the catalyst contains a silica sol carrier and other carriers, and the silica sol carrier content is 1-15% by weight, such as 5-15% by weight based on SiO 2, and the other carrier Including one or more of alumina sol, pseudo-boehmite and clay.
- the application according to item D32 which includes contacting and reacting heavy oil with the catalytic cracking at a reaction temperature of 500-550°C; a weight hourly space velocity of 5-30 hours -1 , and a catalyst-oil ratio of 1-15.
- the heavy oil is one or more of atmospheric residual oil, atmospheric gas oil, vacuum residual oil, vacuum gas oil, coking wax oil, and light and heavy deasphalted oil.
- a catalytic cracking catalyst for the conversion of intermediate base crude oil which contains 50-79% by weight of carrier, 15-35% by weight of core-shell molecular sieve, and 5-10% by weight of Y molecular sieve on a dry basis.
- the core-shell molecular sieve is ZSM-5 molecular sieve as the core phase
- the shell layer is ⁇ molecular sieve
- the core-shell molecular sieve is X-ray diffraction spectrum
- a method for preparing a catalytic cracking catalyst comprising: forming a slurry of a first molecular sieve, a second molecular sieve, a third molecular sieve, and a carrier, and spray drying; wherein the first molecular sieve is a core-shell molecular sieve, and the second molecular sieve It is a molecular sieve with a pore opening diameter of 0.65-0.70 nanometers, and the third molecular sieve is a Y-type molecular sieve.
- Sodium core-shell molecular sieve ammonium exchange makes the content of Na 2 O in the core-shell molecular sieve less than 0.15% by weight;
- step 1) The method according to item E16, wherein the contact in step 1) is carried out by adding ZSM-5 molecular sieve to a surfactant solution with a concentration of 0.05-50% by weight and contacting for at least 0.5h , Filter and dry to obtain ZSM-5 molecular sieve material I, the contact time is 1-36h, and the contact temperature is 20-70°C.
- the surfactant is selected from polymethylmethacrylate, polydiallyldimethylammonium chloride, dipicolinic acid, ammonia, ethylamine, n-butyl Amine, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetraethylammonium bromide, tetrapropylammonium bromide, tetrabutylammonium hydroxide, or a combination thereof.
- step 1) the molar ratio of silicon to aluminum of the ZSM-5 molecular sieve is 10- ⁇ in terms of SiO 2 /Al 2 O 3 , and the average crystal grain size of the ZSM-5 molecular sieve is 0.05 -20 ⁇ m.
- the method according to item E16, wherein the contacting in step 2) includes: adding ZSM-5 molecular sieve material I to the slurry containing ⁇ molecular sieve, stirring at 20-60°C for at least 0.5 hours, and then filtering , Dry to obtain ZSM-5 molecular sieve material II, the concentration of ⁇ molecular sieve in the ⁇ molecular sieve-containing slurry is 0.1-10% by weight, for example, 0.3-8% by weight, the slurry containing ⁇ molecular sieve and ZSM- 5
- the weight ratio of molecular sieve material I is 10-50:1.
- the silicon source is selected from the group consisting of tetraethyl orthosilicate, water glass, silica sol, coarse-pored silica gel, white carbon black, activated clay, or a combination thereof;
- the aluminum source is selected from aluminum sulfate, aluminum nitrate, aluminum isopropoxide, aluminum sol, sodium metaaluminate, ⁇ -alumina, or a combination thereof;
- the template is tetraethylammonium fluoride, tetraethyl bromide One or more of ammonium chloride, tetraethylammonium chloride, tetraethylammonium hydroxide, polyvinyl alcohol, triethanolamine, or sodium carboxymethyl cellulose.
- step 3 The method according to item E16, wherein in step 3), the silicon source, aluminum source, template agent, and deionized water are mixed to form a synthetic solution, which is then crystallized at 75-250°C for 10-80h , To obtain the pre-crystallized synthetic solution III.
- the process can be carried out one or more times; the ammonium salt is selected from one or more mixtures of ammonium chloride, ammonium sulfate, and ammonium nitrate.
- step (6) The method according to item E16, wherein the calcination in step (6) has a calcination temperature of 350-600°C and a calcination time of 2-6 hours to remove the template agent.
- silica carrier is one or more of neutral silica sol, acid silica sol or alkaline silica sol; preferably, the silica sol content in the catalyst It is 1-15% by weight based on SiO 2.
- a method for catalytic cracking of heavy oil comprising the step of contacting and reacting heavy oil with any one of items E1-E14 or the catalyst described in item E32.
- An intermediate base crude oil catalytic cracking method comprising the step of contacting and reacting the intermediate base crude oil with any one of items E1-E14 or the catalyst described in item E33, wherein the reaction temperature is 550-620°C.
- instrument and test conditions used for XRD analysis instrument: Empyrean; test conditions: tube voltage 40kV, tube current 40mA, Cu target K ⁇ radiation, 2 ⁇ scan range 5°-35°, scan rate 2( °)/min.
- X-ray diffraction analysis peaks to calculate the mass ratio of the core phase to the shell layer, the JADE software is used to perform the fitting calculation with the fitting function pseudo-voigt.
- the crystal grain size is the size of the widest part of the crystal grain, which is obtained by measuring the diameter of the largest circumscribed circle of the projection of the crystal grain.
- the particle size is the size at the widest point of the particle, which is obtained by measuring the diameter of the largest circumscribed circle of the particle's projection.
- the thickness of the shell layer is measured by the TEM method.
- the shell layer thickness of a core-shell molecular sieve particle is measured randomly, and 10 particles are measured, and the average value is taken.
- the coverage of the molecular sieve was measured by the SEM method. The ratio of the outer surface area of a core-phase particle with a shell to the outer surface area of the core-phase particle was calculated. As the coverage of the particle, 10 particles were randomly measured and the average value was taken.
- the mesopore surface area (mesopore specific surface area), specific surface area, pore volume (total pore volume) and pore size distribution were measured by the low-temperature nitrogen adsorption volumetric method, using the American Micromeritics company ASAP2420 adsorber, and the samples were vacuum desorbed at 100°C and 300°C.
- the N2 adsorption and desorption test was carried out at 77.4K temperature for 0.5h and 6h. The adsorption and desorption capacity of the sample for nitrogen under different specific pressure conditions were tested, and the N 2 adsorption-desorption isotherm was obtained.
- the silicon-to-aluminum ratio of the raw material ZSM-5 molecular sieve was measured by XRF fluorescence measurement, and the silicon-to-aluminum ratio of the shell molecular sieve was measured by the TEM-EDS method.
- the XRD analysis of the pre-crystallized synthesis solution III is as follows: the pre-crystallized synthesis solution III is filtered first, and then washed with deionized water 8 times the weight of the solid, dried at 120°C for 4 hours, roasted at 550°C for 4 hours, and cooled. , Carry out XRD measurement (the instrument and analysis method used for XRD measurement are as described above).
- the hydrogen type ZSM-5 molecular sieve will be used as the nuclear phase (the silicon-to-aluminum ratio is 30, the average grain size is 1.2 ⁇ m, the average particle size of ZSM-5 molecular sieve is 15 ⁇ m, and the crystallinity is 93.0% )
- 5.0g was added to 50.0g methyl methacrylate and sodium chloride aqueous solution (wherein the methyl methacrylate mass percentage concentration is 0.2%, the sodium chloride mass concentration is 5.0%), stirred for 1h, filtered, and heated at 50°C Dry under air atmosphere to obtain ZSM-5 molecular sieve material I;
- ⁇ molecular sieve suspension a suspension of hydrogen type ⁇ molecular sieve and water.
- the weight percentage concentration of ⁇ molecular sieve in the ⁇ molecular sieve suspension is 0.3% by weight, of which ⁇ molecular sieve
- the average grain size is 0.2 microns
- the silicon-to-aluminum ratio is 30, the crystallinity is 89%
- ⁇ molecular sieve particles are single crystal particles
- the mass ratio of ZSM-5 molecular sieve material I to ⁇ molecular sieve suspension is 1:10, Stir for 1 hour at a temperature of 50°C, filter, and dry the filter cake in an air atmosphere at 90°C to obtain ZSM-5 molecular sieve material II;
- Figure 1 shows the SEM image of the ZSM-5/ ⁇ core-shell molecular sieve prepared in Example I-1. As shown in the figure, the shell ⁇ molecular sieve of the core-shell molecular sieve has good coverage; at high magnifications (see the right half of Figure 1), the core-phase molecular sieve structure composed of polycrystalline particles can be seen.
- FIG. 2A shows the XRD diffraction spectrum of the ZSM-5/ ⁇ core-shell molecular sieve prepared in Example I-1
- Figure 2B shows a partial enlarged view of the XRD diffraction spectrum, where the 2 ⁇ angle is 22.4
- the diffraction peaks at ° and 23.1 ° are the characteristic peaks of the shell and core phases, respectively.
- Figure 4 shows the TEM image of the ZSM-5/ ⁇ core-shell molecular sieve prepared in Example I-1. Through TEM, it is observed that the shell ⁇ molecular sieve grows depending on the core phase and finally becomes the core-shell molecular sieve.
- Figure 5 shows the pore size distribution diagram of the ZSM-5/ ⁇ core-shell molecular sieve prepared in Example I-1.
- the pore size distribution curve shown proves that the core-shell molecular sieve is a multi-stage microporous-mesoporous-macroporous molecular sieve. ⁇ Hole structure.
- the molecular sieve was synthesized according to the method of Example I-1. The difference is that in step (3), the crystallization temperature is 30°C, the crystallization time is 3 hours, and the sample of the crystalline product is filtered, washed, dried, and calcined.
- Example I-1 According to the ratio of Example I-1, the ZSM-5 and ⁇ molecular sieve used in steps (1) and (2) of Example I-1 were mechanically mixed to obtain a molecular sieve mixture.
- the molecular sieve was synthesized according to the method of Example I-1, except that step (2) was not used, and the product ZSM-5 molecular sieve material I of step (1) was directly used in step (4) instead of ZSM-5 molecular sieve material II.
- the weight percentage concentration of the ⁇ molecular sieve in the ⁇ molecular sieve suspension is: 5.0% by weight, the average crystal grain size of the ⁇ molecular sieve is 50 nm, and the silicon-aluminum ratio is 30.0, the crystallinity is 95.0%
- the mass ratio of ZSM-5 molecular sieve material I and ⁇ molecular sieve suspension is 1:20, stir at 50°C for 10 hours, filter, and then filter cake in 120°C air atmosphere Dry to obtain ZSM-5 molecular sieve material II;
- the molecular sieve was synthesized according to the method of Example I-1, except that the ZSM-5 molecular sieve obtained in step (1) of Comparative Example I-1 was used as the nuclear phase molecular sieve.
- the ZSM-5/ ⁇ core-shell molecular sieves prepared in the above Examples I-1 to I-5 and the molecular sieve samples of each comparative example were subjected to ammonium exchange, so that the sodium oxide content was less than 0.1% by weight, and a hydrogen molecular sieve was obtained.
- the hydrogen molecular sieves obtained above were respectively aged at 800°C and 100% water vapor for 4 hours.
- the aging samples were evaluated on the fixed bed micro-reactor ACE-MODEL FB (standard methods refer to ASTM D5154 and D7964).
- Hydrogen-modified heavy oil see Table I-2 for composition and physical properties).
- the evaluation conditions include: reaction temperature of 550°C, reaction pressure of 0.1Mpa, agent-to-oil ratio (weight) of 3, and oil feed time of 150 seconds. The evaluation results are listed In Table I-3.
- the core-shell molecular sieve provided by the present application can have a higher propylene yield, and a higher ethylene yield, increased heavy oil conversion rate, and liquefied gas (C 3 -C 4 ) The yield is significantly improved.
- the hydrogen type ZSM-5 molecular sieve will be used as the nuclear phase (the silicon-to-aluminum ratio is 30, the average grain size is 1.2 ⁇ m, the average particle size of ZSM-5 molecular sieve is 15 ⁇ m, and the crystallinity is 93.0% )
- 500g was added to 5000g methyl methacrylate and sodium chloride aqueous solution (where the methyl methacrylate mass percentage concentration is 0.2%, and the sodium chloride mass concentration is 5.0%), stirred for 1h, filtered, and placed in an air atmosphere at 50°C. After drying, obtain ZSM-5 molecular sieve material I;
- ⁇ molecular sieve suspension a suspension of hydrogen type ⁇ molecular sieve and water.
- the weight percentage concentration of ⁇ molecular sieve in the ⁇ molecular sieve suspension is 0.3% by weight, of which ⁇ molecular sieve
- the average grain size is 0.2 microns
- the silicon-to-aluminum ratio is 30, the crystallinity is 89%
- ⁇ molecular sieve particles are single crystal particles
- the mass ratio of ZSM-5 molecular sieve material I to ⁇ molecular sieve suspension is 1:10, Stir for 1 hour at a temperature of 50°C, filter, and dry the filter cake in an air atmosphere at 90°C to obtain ZSM-5 molecular sieve material II;
- the weight percentage concentration of the ⁇ molecular sieve in the ⁇ molecular sieve suspension is: 5.0% by weight, the average crystal grain size of the ⁇ molecular sieve is 50 nm, and the silicon-aluminum ratio is 30.0, the crystallinity is 95.0%
- the mass ratio of ZSM-5 molecular sieve material I and ⁇ molecular sieve suspension is 1:20, stir at 50°C for 10 hours, filter, and then filter cake in 120°C air atmosphere Dry to obtain ZSM-5 molecular sieve material II;
- the molecular sieve was synthesized according to the method of Example II-1. The difference is that in step (3), the crystallization temperature is 30°C, the crystallization time is 3 hours, and the sample of the crystalline product is filtered, washed, dried, and calcined.
- the resulting molecular sieve is denoted as DZ-II-2.
- Example II-1 According to the ratio of Example II-1, the ZSM-5 and ⁇ molecular sieve used in steps (1) and (2) of Example II-1 were mechanically mixed, and the resulting molecular sieve mixture was denoted as DZ-II-3.
- the following examples and comparative examples are used to illustrate the preparation of the catalyst of the first type of embodiment provided in this application, wherein the kaolin used is an industrial product of China Kaolin Company, and its solid content is 75% by weight; the pseudo-boehmite (abbreviated as aluminum) Stone) is produced by Shandong Aluminum Company, and its alumina content is 65% by weight; aluminum sol is produced by Qilu Branch of Sinopec Catalyst Co., Ltd., and its alumina content is 21% by weight.
- the kaolin used is an industrial product of China Kaolin Company, and its solid content is 75% by weight
- the pseudo-boehmite (abbreviated as aluminum) Stone) is produced by Shandong Aluminum Company, and its alumina content is 65% by weight
- aluminum sol is produced by Qilu Branch of Sinopec Catalyst Co., Ltd., and its alumina content is 21% by weight.
- the core-shell molecular sieves prepared in Examples II-1 to II-3 were respectively prepared into catalysts, and the catalyst numbers were A-II-1, A-II-2, and A-II-3 in sequence.
- Comparative Examples II-4 to II-6 illustrate the catalysts prepared by using the molecular sieves provided in Comparative Examples II-1 to II-3.
- Example II-4 According to the catalyst preparation method of Example II-4, the molecular sieves prepared in Comparative Examples II-1 to II-3 and the aged pseudo-boehmite slurry, kaolin, water, modified silica sol and alumina sol were mixed, and spray dried Prepared into microsphere catalyst.
- the serial numbers of the obtained catalysts are: DB-II-1, DB-II-2 and DB-II-3.
- Table II-2 shows the types and dosages of molecular sieves used in the examples and comparative examples, the dosages of alumina sol, pseudo-boehmite, modified silica sol and kaolin on a dry basis, based on the preparation of 1Kg catalyst .
- the rare earth content of the modified silica sol is based on the weight content of RE 2 O 3 based on silica.
- Table II-3 shows the dry weight percentage composition of the catalysts A-II-1 to A-II-3 of each example and the catalysts DB-II-1 to DB-II-3 of the comparative examples.
- the content of molecular sieve, bauxite, alumina sol, silica sol and kaolin in the catalyst composition is calculated according to the amount of feed used in the preparation.
- C2 refers to ethylene
- C3 refers to propylene
- C3 0 refers to propane.
- total sulfur (high seas) indicates that the total sulfur content meets the standards for use on the high seas.
- the catalyst of the first embodiment of the present application is used for hydrogenation of VGO conversion, and has a higher yield of fuel oil, higher yields of ethylene and propylene, and a higher ratio of propylene/propane.
- the fuel oil obtained can meet the marine fuel oil standard.
- the hydrogen type ZSM-5 molecular sieve will be used as the nuclear phase (the silicon-to-aluminum ratio is 30, the average grain size is 1.2 ⁇ m, the average particle size of ZSM-5 molecular sieve is 15 ⁇ m, and the crystallinity is 93.0% )
- 500g was added to 5000g methyl methacrylate and sodium chloride aqueous solution (where the methyl methacrylate mass percentage concentration is 0.2%, and the sodium chloride mass concentration is 5.0%), stirred for 1h, filtered, and placed in an air atmosphere at 50°C. After drying, obtain ZSM-5 molecular sieve material I;
- ⁇ molecular sieve suspension a suspension of hydrogen type ⁇ molecular sieve and water.
- the weight percentage concentration of ⁇ molecular sieve in the ⁇ molecular sieve suspension is 0.3% by weight, of which ⁇ molecular sieve
- the average grain size is 0.2 microns
- the silicon-to-aluminum ratio is 30, the crystallinity is 89%
- ⁇ molecular sieve particles are single crystal particles
- the mass ratio of ZSM-5 molecular sieve material I to ⁇ molecular sieve suspension is 1:10, Stir for 1 hour at a temperature of 50°C, filter, and dry the filter cake in an air atmosphere at 90°C to obtain ZSM-5 molecular sieve material II;
- the weight percentage concentration of ⁇ molecular sieve in the ⁇ molecular sieve suspension is: 5.0% by weight, the average crystal grain size of the ⁇ molecular sieve is 50nm, and the silicon-aluminum ratio is 30.0, the crystallinity is 95.0%
- the mass ratio of ZSM-5 molecular sieve material I and ⁇ molecular sieve suspension is 1:20, stir at 50°C for 10 hours, filter, and then filter cake in 120°C air atmosphere Dry to obtain ZSM-5 molecular sieve material II;
- the molecular sieve was synthesized according to the method of Example III-1.
- the ZSM-5 and ⁇ molecular sieve used in steps (1) and (2) of Example III-1 were mechanically mixed, and the resulting molecular sieve mixture was denoted as DZ-III-3.
- Example III-1 to III-3 and Comparative Examples III-1 to III-2 are shown in Table III-1, and the steps of Examples III-1 to III-3 and Comparative Examples III-1 to III-2 ( 4)
- the properties of the molecular sieve obtained are shown in Table III-1 (continued).
- the properties of the mixed molecular sieve of Comparative Example III-3 are shown in Table III-1 (continued).
- the following examples illustrate the preparation of the catalyst of the second embodiment of the present application.
- the kaolin used in the examples is an industrial product of China Kaolin Company, and its solid content is 75% by weight; the pseudo-boehmite used is produced by Shandong Aluminum Company.
- the alumina content is 65% by weight; the alumina sol is produced by Sinopec Catalyst Qilu Branch, and its alumina content is 21% by weight.
- the silica sol is produced by Beijing Chemical Plant, and its silica content is 25% by weight and the pH value is 3.0.
- the second molecular sieve is ⁇ molecular sieve, hydrogen type, silicon-aluminum ratio of 35, sodium oxide content of 0.1% by weight, and crystallinity of 91.3%, produced by Qilu Branch of Sinopec Catalysts.
- Examples III-4 to III-6 illustrate the preparation of the hydrogenation LCO catalytic cracking catalyst provided in this application.
- the core-shell molecular sieves prepared in Examples III-1 to III-3 were respectively prepared into catalysts, and the catalyst numbers were A-III-1, A-III-2, and A-III-3 in sequence.
- Pseudo-boehmite (abbreviated as bauxite) is mixed with water and stirred evenly. Under stirring, 36% by weight concentrated hydrochloric acid (chemically pure, produced by Beijing Chemical Plant) is added, and the acid-to-aluminum ratio is 0.2 (36 weight) % Concentrated hydrochloric acid and the mass ratio of pseudo-boehmite calculated as Al 2 O 3 ), the resulting mixture is heated to 70° C. and aged for 1.5 hours to obtain an aged pseudo-boehmite slurry. The alumina content in the aged pseudo-boehmite slurry is 12% by weight;
- the catalyst was prepared according to the method of Example III-4, except that the silica sol was not used, and the same amount of aluminum sol was used instead to obtain the catalyst A-III-4.
- Table III-2 shows the number and amount of the first molecular sieve used in Examples III-4 to III-7, the type and amount of the second molecular sieve, the amount of aluminum sol, silica sol and kaolin used in the preparation of 1Kg catalytic cracking catalyst as The basis is based on the weight on a dry basis.
- Table III-3 shows the dry weight percentage composition of the catalysts A-III-1 to A-III-4 of Examples III-4 to III-7.
- the content of the first molecular sieve, the second molecular sieve, the binder, and the kaolin in the catalyst composition is calculated according to the feed amount used in the preparation.
- Comparative Examples III-4 to III-6 illustrate the catalysts prepared by using the molecular sieves provided in Comparative Examples III-1 to III-3.
- the first molecular sieve (respectively the molecular sieves DZ-III-1, DZ-III-2 and DZ-III-3 prepared in Comparative Examples III-1 to III-3) and the first molecular sieve Dimolecular sieve, pseudo-boehmite, kaolin, silica sol, aluminum sol and water are mixed to make a slurry, and spray-dried to prepare a microsphere catalyst.
- the serial numbers of the obtained catalysts are: DB-III-1, DB-III-2 and DB-III-3.
- Table III-2 shows the type and amount of the first molecular sieve used in the catalysts of each comparative example, the amount of the second molecular sieve, aluminum sol, silica sol and kaolin, based on the preparation of 1Kg catalyst, based on the dry basis weight.
- Table III-3 shows the dry weight percent composition of the catalysts of each comparative example.
- the catalytic cracking catalysts A-III-1 to A-III-4 prepared in Examples III-4 to III-7 and the catalysts DB-III-1 to DB-III-3 prepared in Comparative Examples III-4 to III-6 After aging at 800°C and 100% water vapor for 4 hours, the catalytic cracking reaction performance was evaluated on a small fixed fluidized bed reactor. The evaluation conditions were reaction temperature of 580°C, weight space velocity of 4.0 hours -1 , and oil The ratio is 12 weight ratio. The properties of hydrogenated LCO are shown in Table III-4, and the reaction results are shown in Table III-5.
- the yields of low-carbon olefins described in Table III-5 are calculated based on the feed amount of raw materials, and low-carbon olefins refer to C2-C4 olefins.
- the catalyst of the second embodiment of the present application used for hydrogenation LCO conversion can have higher cracking capacity and low-carbon olefin yield, and can have higher liquefied gas yield. .
- the hydrogen type ZSM-5 molecular sieve will be used as the nuclear phase (the silicon-to-aluminum ratio is 30, the average grain size is 1.2 ⁇ m, the average particle size of ZSM-5 molecular sieve is 15 ⁇ m, and the crystallinity is 93.0% )
- 500g was added to 5000g methyl methacrylate and sodium chloride aqueous solution (where the methyl methacrylate mass percentage concentration is 0.2%, and the sodium chloride mass concentration is 5.0%), stirred for 1h, filtered, and placed in an air atmosphere at 50°C. After drying, obtain ZSM-5 molecular sieve material I;
- ⁇ molecular sieve suspension a suspension of hydrogen type ⁇ molecular sieve and water.
- the weight percentage concentration of ⁇ molecular sieve in the ⁇ molecular sieve suspension is 0.3% by weight, of which ⁇ molecular sieve
- the average grain size is 0.2 microns
- the silicon-to-aluminum ratio is 30, the crystallinity is 89%
- ⁇ molecular sieve particles are single crystal particles
- the mass ratio of ZSM-5 molecular sieve material I and ⁇ molecular sieve suspension is 1:10, Stir for 1 hour at a temperature of 50°C, filter, and dry the filter cake in an air atmosphere at 90°C to obtain ZSM-5 molecular sieve material II;
- the weight percentage concentration of the ⁇ molecular sieve in the ⁇ molecular sieve suspension is: 5.0% by weight, the average crystal grain size of the ⁇ molecular sieve is 50 nm, and the silicon-aluminum ratio is 30.0, the crystallinity is 95.0%
- the mass ratio of ZSM-5 molecular sieve material I and ⁇ molecular sieve suspension is 1:20, stir at 50°C for 10 hours, filter, and then filter cake in 120°C air atmosphere Dry to obtain ZSM-5 molecular sieve material II;
- the molecular sieve was synthesized according to the method of Example IV-1. The difference is that in step (3), the crystallization temperature is 30°C, the crystallization time is 3 hours, and the sample of the crystalline product is filtered, washed, dried, and calcined.
- the resulting molecular sieve is denoted as DZ-IV-2.
- Example IV-1 According to the ratio of Example IV-1, the ZSM-5 and ⁇ molecular sieve used in steps (1) and (2) of Example IV-1 were mechanically mixed, and the resulting molecular sieve mixture was denoted as DZ-IV-3.
- the following examples illustrate the preparation of the catalyst of the third embodiment provided in this application.
- the kaolin used in the examples is an industrial product of China Kaolin Company, and its solid content is 75% by weight; the pseudo-boehmite used is produced by Shandong Aluminum Company , Its alumina content is 65% by weight; alumina sol is produced by Qilu Branch of Sinopec Catalyst Co., Ltd., and its alumina content is 21% by weight; silica sol is produced by Beijing Chemical Plant, its silica content is 25% by weight, and its pH The value is 2.5.
- Y-type molecular sieve grade HSY-12, rare earth content of 12% by weight, silicon-to-aluminum ratio of 6.0, crystallinity of 53.0%, produced by Qilu Branch of Sinopec Catalyst Co., Ltd.
- the hydrogen core-shell molecular sieves prepared in Examples IV-1 to IV-3 were prepared into catalysts, and the catalyst numbers were A-IV-1, A-IV-2, and A-IV-3.
- bauxite Pseudo-boehmite (abbreviated as bauxite) and water are evenly mixed, and 36% by weight concentrated hydrochloric acid (chemically pure, produced by Beijing Chemical Plant) is added under stirring, and the ratio of acid aluminum (36% by weight hydrochloric acid to The weight ratio of pseudo-boehmite based on alumina is 0.20, and the resulting mixture is heated to 70° C. and aged for 1.5 hours to obtain aged pseudo-boehmite.
- the alumina content of the bauxite slurry is 12% by weight;
- Table IV-2 shows the type and dosage of hydrogen core-shell molecular sieve (the first molecular sieve) used, and the dosage of Y molecular sieve, bauxite, alumina sol, silica sol and kaolin, based on the preparation of 1kg catalyst, based on dry Base meter.
- Table IV-3 shows the composition of the catalysts A-IV-1 to A-IV-3 of each example.
- the content of the first molecular sieve, Y-type molecular sieve, alumina sol, silica sol, bauxite, and kaolin in the catalyst composition is calculated according to the feed amount used in the preparation.
- Comparative Examples IV-4 to IV-6 illustrate the catalysts prepared by using the molecular sieves provided in Comparative Examples IV-1 to IV-3.
- Example IV-4 According to the catalyst preparation method of Example IV-4, the molecular sieves, Y-type molecular sieves, pseudo-boehmite, kaolin, water and aluminum sol prepared in Comparative Examples IV-1 to IV-3 were mixed, and spray-dried to prepare microsphere catalysts. .
- the serial numbers of the obtained catalysts are: DB-IV-1, DB-IV-2 and DB-IV-3.
- Table IV-2 shows the type and dosage of the first molecular sieve used in each comparative example, and the dosage of Y-type molecular sieve, alumina sol, bauxite, silica sol and kaolin.
- Table IV-3 shows the catalyst composition of each comparative example.
- the catalysts A-IV-1 to A-IV-3 and DB-IV-1 to DB-IV-3 were evaluated on a small fixed fluidized bed reactor.
- the evaluation conditions are as follows: the reaction temperature is 520°C, the weight space velocity is 4.0h -1 , and the agent-oil ratio is 6.
- the properties of the feed oil are shown in Table IV-4, and the evaluation results are shown in Table IV-5.
- the catalyst of the third embodiment of the present application has higher heavy oil cracking capacity, higher yield of low-carbon olefins, significantly higher yield of propylene, and yield of carbon four olefins. Significantly higher.
- the hydrogen type ZSM-5 molecular sieve will be used as the nuclear phase (the silicon-to-aluminum ratio is 30, the average grain size is 1.2 ⁇ m, the average particle size of the ZSM-5 molecular sieve is 15 ⁇ m, and the crystallinity is 93.0% )500g was added to 5000g methyl methacrylate and sodium chloride aqueous solution (where the methyl methacrylate mass percentage concentration is 0.2%, and the sodium chloride mass concentration is 5.0%), stirred for 1h, filtered, and placed in an air atmosphere at 50°C. Next, dry to obtain ZSM-5 molecular sieve material I;
- ⁇ molecular sieve suspension a suspension of hydrogen type ⁇ molecular sieve and water.
- the weight percentage concentration of ⁇ molecular sieve in the ⁇ molecular sieve suspension is 0.3% by weight, of which ⁇ molecular sieve
- the average grain size is 0.2 microns
- the silicon-to-aluminum ratio is 30, the crystallinity is 89%
- ⁇ molecular sieve particles are single crystal particles
- the mass ratio of ZSM-5 molecular sieve material I and ⁇ molecular sieve suspension is 1:10, Stir for 1 hour at a temperature of 50°C, filter, and dry the filter cake in an air atmosphere at 90°C to obtain ZSM-5 molecular sieve material II;
- the weight percentage concentration of ⁇ molecular sieve in the ⁇ molecular sieve suspension is: 5.0% by weight, the average crystal grain size of the ⁇ molecular sieve is 50nm, and the silicon-aluminum ratio is 30.0, the crystallinity is 95.0%
- the mass ratio of ZSM-5 molecular sieve material I and ⁇ molecular sieve suspension is 1:20, stir at 50°C for 10 hours, filter, and then filter cake in 120°C air atmosphere Dry to obtain ZSM-5 molecular sieve material II;
- Example V-1 after mechanically mixing the ZSM-5 and ⁇ molecular sieve used in steps (1) and (2) of Example V-1, the resulting molecular sieve mixture is denoted as DZ-V-3.
- the kaolin used is an industrial product of China Kaolin Company, and its solid content is 75% by weight;
- the pseudo-boehmite used is Shandong Aluminum Company
- the alumina content is 65% by weight;
- the alumina sol is produced by Qilu Branch of Sinopec Catalysts, and its alumina content is 21% by weight;
- the silica sol is produced by Beijing Chemical Plant, and its silica content is 25% by weight, and the pH value is Is 2.0.
- Y-type molecular sieve grade HSY-0E, rare earth content of 2% by weight, silicon to aluminum ratio of 9.0, crystallinity of 60%, produced by Qilu Branch of Sinopec Catalyst Co., Ltd.
- the hydrogen core-shell molecular sieves prepared in Examples V-1 to V-3 were prepared into catalysts, and the catalyst numbers were: A-V-1, A-V-2, and A-V-3.
- Pseudo-boehmite (abbreviated as bauxite) and water are evenly mixed, and 36% by weight concentrated hydrochloric acid (chemically pure, produced by Beijing Chemical Plant) is added under stirring, and the ratio of acid aluminum (36% by weight hydrochloric acid to The weight ratio of pseudo-boehmite based on alumina is 0.2, and the resulting mixture is heated to 70° C. and aged for 1.5 hours to obtain aged pseudo-boehmite; the alumina content of the bauxite slurry is 12% by weight;
- the catalyst was prepared according to the method of Example V-5, except that silica sol was not used, and aluminum sol of equal weight was used instead.
- the obtained catalyst is referred to as A-V-4.
- Comparative Examples V-4 to V-6 illustrate the catalysts prepared by using the molecular sieves provided in Comparative Examples V-1 to V-3.
- Example V-4 According to the catalyst preparation method of Example V-4, the molecular sieves, Y-type molecular sieves, second molecular sieves, pseudo-boehmite, kaolin, silica sol, aluminum sol, and water prepared in Comparative Examples V-1 to V-3 were mixed, The microsphere catalyst was prepared by spray drying.
- the serial numbers of the obtained catalysts are: DB-V-1, DB-V-2 and DB-V-3.
- Table V-2 shows the type and dosage of the first molecular sieve used in each example and comparative example, the dosage of Y-type molecular sieve, second molecular sieve, aluminum sol, silica sol and kaolin, based on the preparation of 1kg catalyst, on a dry basis Weight meter.
- Table V-3 shows the catalyst composition of each example and comparative example, on a dry basis.
- the content of the first molecular sieve, Y-type molecular sieve, second molecular sieve, alumina sol, silica sol, bauxite, and kaolin in the catalyst composition is calculated according to the feed amount used in the preparation.
- the catalysts prepared in Examples V-4 to V-7 and Comparative Examples V-4 to V-6 were aged at 800°C and 100% by volume of water vapor for 17 hours, and then evaluated on a small fixed fluidized bed reactor.
- Base crude oil catalytic cracking reaction performance the evaluation conditions are that the reaction temperature is 580°C, the weight space velocity is 4.0 hours -1 , and the agent-to-oil ratio is 10 weight ratio.
- the properties of the intermediate base crude oil used are shown in Table V-4, and the reaction results are shown in Table V-5.
- the yields of low-carbon olefins in Table V-5 are calculated based on the raw material feed amount.
- the catalyst of the fourth embodiment of this application has a higher intermediate base crude oil cracking capacity, the yield of diesel and heavy oil is lower, the yield of low-carbon olefins is significantly higher, and the yield of liquefied gas is obvious higher.
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Abstract
Description
性质 | 加氢改质重油 |
密度(20℃)/(千克/米 3) | 890.0 |
硫/(微克/克) | <200 |
Ni+V/(微克/克) | <1 |
氢含量/% | 12.90 |
环烷环烃含量/% | 44.67% |
终馏点 | 630℃ |
性质 | 加氢VGO |
20℃密度,g/cm 3 | 0.8974 |
70℃折光 | 1.4794 |
80℃粘度,mm 2/s | 15.87 |
残炭,m% | 0.3 |
四组分,m% | |
饱和烃 | 78.8 |
芳烃 | 19.6 |
胶质 | 1.6 |
沥青质 | <0.1 |
烃类组成,m% | |
链烷烃 | 30.5 |
总环烷烃 | 48.3 |
性质 | 加氢LCO |
碳含量,wt% | 88.37 |
氢含量,wt% | 11.63 |
20℃密度,kg/m 3 | 888.7 |
10%残炭,wt% | <0.1 |
凝固点,℃ | <-50 |
链烷烃,wt% | 13.0 |
一环烷烃,wt% | 7.6 |
二环烷烃,wt% | 18.1 |
三环烷烃,wt% | 8.7 |
总环烷烃,wt% | 34.4 |
总双环芳烃,wt% | 6.4 |
性质 | 原料油 |
20℃密度,g/cm 3 | 0.9044 |
20℃折光 | 1.5217 |
100℃粘度,mm 2/s | 9.96 |
凝固点,℃ | 40 |
苯胺点,℃ | 95.8 |
残炭值,% | 3.0 |
馏程,℃ | |
初馏点 | 243 |
5% | 294 |
10% | 316 |
30% | 395 |
50% | 429 |
70% | 473 |
90% | - |
性质 | 中间基原油 |
碳含量,wt% | 86.43 |
氢含量,wt% | 12.88 |
20℃密度,kg/m 3 | 901 |
残炭,wt% | 4.8 |
凝固点,℃ | 42 |
初馏点,℃ | 278.8 |
终馏点,℃ | 540.2 |
饱和烃,wt% | 40 |
芳烃,wt% | 22.6 |
胶质,wt% | 37.3 |
沥青质,wt% | 0.1 |
链烷烃,wt% | 29.4 |
一环烷烃,wt% | 8.4 |
二环烷烃,wt% | 9.5 |
三环烷烃,wt% | 6.7 |
总环烷烃,wt% | 26.4 |
总双环芳烃,wt% | 10.2 |
Claims (18)
- 一种ZSM-5/β核壳型分子筛,包括由至少2个ZSM-5分子筛晶粒构成的核相和由多个β分子筛晶粒构成的壳层,所述ZSM-5分子筛晶粒的平均晶粒尺寸为0.05-15μm,优选为0.1-10μm,所述核壳型分子筛的壳层覆盖度为50-100%,优选为80-100%,壳层厚度为10-2000nm,优选为50-2000nm,壳层中β分子筛晶粒的平均晶粒尺寸为10-500nm,优选50-500nm,其中所述ZSM-5/β核壳型分子筛的X射线衍射谱图中2θ=22.4°处的衍射峰的峰高与2θ=23.1°处的衍射峰的峰高之比为0.1-10∶1,优选0.1-5∶1。
- 根据权利要求1所述的ZSM-5/β核壳型分子筛,其中,所述ZSM-5/β核壳型分子筛的总比表面积大于420m 2/g,优选为450-620m 2/g,孔直径为2-50nm的孔的比表面积占总比表面积的比例为10-40%,优选为12-35%。
- 根据权利要求1或2所述的ZSM-5/β核壳型分子筛,其中,所述ZSM-5/β核壳型分子筛的核相与壳层的质量比为0.2-20∶1,优选为1-15∶1。
- 根据权利要求1-3中任一项所述的ZSM-5/β核壳型分子筛,其中,所述ZSM-5/β核壳型分子筛中孔直径为2-80nm的孔的孔体积占总孔体积的10-30%;孔直径为20-80nm的孔的孔体积占直径为2-80nm的孔的孔体积的50-70%。
- 一种ZSM-5/β核壳型分子筛的合成方法,包括如下步骤:1)用表面活性剂溶液对颗粒形式的ZSM-5分子筛进行处理,得到ZSM-5分子筛材料I,其中所述ZSM-5分子筛的颗粒优选由至少2个ZSM-5分子筛晶粒构成;2)用含颗粒形式的β分子筛的浆液对所述ZSM-5分子筛材料I进行处理,得到ZSM-5分子筛材料II,其中所述β分子筛的颗粒由至少1个β分子筛晶粒构成;3)提供含有硅源、铝源、任选的碱源、模板剂和水的合成液,并使其在50-300℃,优选75-250℃,更优选80-180℃的温度下,晶化4-100h,优选10-80h,更优选18-50h,得到预晶化合成液III;以及4)将所述ZSM-5分子筛材料II与所述预晶化合成液III混合并晶 化,得到所述ZSM-5/β核壳型分子筛。
- 根据权利要求5所述的方法,其中,所述步骤1)的处理通过如下方式进行:将所述颗粒形式的ZSM-5分子筛加入到重量百分浓度为0.05-50%的表面活性剂溶液中,在20-70℃的温度下接触至少0.5h,优选1-36h;优选在搅拌条件下接触,随后过滤并干燥。
- 根据权利要求5或6所述的方法,具有以下特征中的一个或多个:所述表面活性剂溶液中还含有0.05-10.0重量%的盐,所述盐优选选自氯化钠、氯化钾、氯化铵、硝酸铵或者它们的组合;步骤1)中表面活性剂溶液与以干基重量计的颗粒形式的ZSM-5分子筛的重量比为10-200∶1;所述表面活性剂选自聚甲基丙烯酸甲酯、聚二烯丙基二甲基氯化铵、吡啶二羧酸、氨水、乙胺、正丁胺、四乙基氢氧化铵、四丙基氢氧化铵、四乙基溴化铵、四丙基溴化铵、四丁基氢氧化铵或者它们的组合;步骤1)中所用的ZSM-5分子筛是钠型、氢型或离子交换的ZSM-5分子筛;以及所述ZSM-5分子筛晶粒的平均晶粒尺寸为0.05-20μm,优选0.1-10μm;所述ZSM-5分子筛颗粒的平均颗粒尺寸优选为0.1-30μm。
- 根据权利要求5-7中任一项所述的方法,其中,所述步骤2)的处理通过如下方式进行:将ZSM-5分子筛材料I加入到含颗粒形式的β分子筛的浆液中,在20-60℃下接触至少0.5小时;优选在搅拌条件下接触,随后过滤并干燥。
- 根据权利要求5-8中任一项所述的方法,具有以下特征中的一个或多个:步骤2)中所用的含颗粒形式的β分子筛的浆液中β分子筛的浓度为0.1-10重量%,优选0.3-8重量%;步骤2)中所述含颗粒形式的β分子筛的浆液与以干基重量计的ZSM-5分子筛材料I的重量比为10-50∶1;步骤2)中所述含颗粒形式的β分子筛的浆液中,β分子筛晶粒的平均晶粒尺寸为0.01-0.5μm优选0.05-0.5μm;β分子筛颗粒的平均颗粒尺寸优选为0.01-0.5μm。
- 根据权利要求5-9中任一项所述的方法,其中,步骤3)中,所述硅源、铝源、任选的碱源、模板剂和水的摩尔比为:R/SiO 2=0.1-10∶1,优选0.1-3∶1,H 2O/SiO 2=2-150∶1,优选10-120∶1;SiO 2/Al 2O 3=10-800∶1;Na 2O/SiO 2=0-2∶1,优选0.01-1.7∶1;其中R表示模板剂,SiO 2表示以SiO 2计的所述硅源,Al 2O 3表示以Al 2O 3计的所述铝源,Na 2O表示以Na 2O计的所述碱源;优选地,所述硅源选自正硅酸乙酯、水玻璃、粗孔硅胶、硅溶胶、白炭黑、活性白土或者它们的组合;所述铝源选自硫酸铝、异丙醇铝、硝酸铝、铝溶胶、偏铝酸钠、γ-氧化铝或者它们的组合;所述碱源选自氢氧化钠、氢氧化钾,或者它们的组合;所述模板剂选自四乙基氟化铵、四乙基氢氧化铵、四乙基溴化铵、四乙基氯化铵、聚乙烯醇、三乙醇胺或羧甲基纤维素钠、或者它们的组合。
- 根据权利要求5-10中任一项所述的方法,其中,步骤4)的所述晶化在50-300℃,优选100-250℃,更优选100-200℃的温度下,进行10-400h,优选30-350h,更优选50-120h;优选地,步骤4)中,所述预晶化合成液III与以干基重量计的ZSM-5分子筛材料II的重量比为2-10∶1,优选4-10∶1。
- 一种催化剂,以干基重量计并以所述催化剂的重量为基准,所述催化剂包含30-90wt%的载体,2-50wt%的根据权利要求1-4中任一项所述的ZSM-5/β核壳型分子筛,以及0-50wt%的附加分子筛,优选地,所述ZSM-5/β核壳型分子筛中以Na 2O计的钠含量不超过0.15重量%。
- 根据权利要求12所述的催化剂,其适用于加氢VGO的催化裂化,其中以干基重量计并以所述催化剂的重量为基准,所述催化剂包含50-90重量%,优选60-85重量%的载体和10-50重量%,优选15-40重量%的所述ZSM-5/β核壳型分子筛,其中所述载体包含硅溶胶和改性元素,所述改性元素优选为稀土元素。
- 根据权利要求13所述的催化剂,其中,所述载体还包括拟薄水铝石、铝溶胶和粘土中的一种或多种,优选地,按干基重量计,所述催化剂中硅溶胶的含量为1-15重量%,拟薄水铝石的含量为5-25重量%,铝溶胶的含量为3-20重量%,粘土的含量为25-50重量%;以及以载体的干基重量为基准,所述载体中,以RE2O3计稀土氧化物含量为0.1-15重量%。
- 根据权利要求12所述的催化剂,其适用于由加氢LCO生产低碳烯烃的催化裂解反应,其中以干基重量计并以所述催化剂的重量为基准,所述催化剂包含50-85重量%的载体,10-35重量%的核壳型分子筛和5-15重量%的孔道开口直径为0.65-0.70纳米的分子筛,优选地,所述孔道开口直径为0.65-0.70纳米的分子筛为具有AET、AFR、AFS、AFI、BEA、BOG、CFI、CON、GME、IFR、ISV、LTL、MEI、MOR、OFF和SAO结构的分子筛中的一种或多种;优选为Beta、SAPO-5、SAPO-40、SSZ-13、CIT-1、ITQ-7、ZSM-18、丝光沸石、钠菱沸石或者它们的组合。优选地,所述载体包括粘土、氧化硅载体、氧化铝载体、磷铝胶中的一种或多种,并任选含有添加剂,所述添加剂选自磷氧化物和碱土金属氧化物。
- 根据权利要求12所述的催化剂,其适用于重油催化裂化,其中以干基重量计并以所述催化剂的重量为基准,所述催化剂包含30-83重量%的载体和2-20重量%的所述核壳型分子筛和15-50重量%的Y型分子筛;优选地,所述载体包括粘土、氧化硅载体和氧化铝载体中的一种或多种。
- 根据权利要求12所述的催化剂,其适用于中间基原油的催化裂解,其中以干基重量计并以所述催化剂的重量为基准,所述催化剂含有50-79重量%的载体、15-35重量%的核壳型分子筛、5-10重量%的Y型分子筛、1-5重量%的孔道开口直径为0.65-0.70纳米的分子筛;优选地,所述Y型分子筛为不含稀土的Y型分子筛,或稀土含量小于5重量%的Y型分子筛,所述Y型分子筛中稀土的含量以RE 2O 3计为0-5重量%,所述Y型分子筛的硅铝比以SiO 2/Al 2O 3摩尔比计为 4-18;所述孔道开口直径为0.65-0.70纳米的分子筛为β分子筛;或者所述载体包括铝溶胶、锆溶胶、拟薄水铝石、硅溶胶、粘土中的一种或多种。
- 一种烃油催化转化方法,包括使烃油原料与根据权利要求12-17中任一项所述的催化剂接触反应的步骤。
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CN116371458A (zh) * | 2023-06-02 | 2023-07-04 | 潍坊正轩稀土催化材料有限公司 | 一种高沸石纳米化zsm-5微球催化剂及其制备方法 |
CN116891402A (zh) * | 2023-09-11 | 2023-10-17 | 山东东信阻燃科技有限公司 | 一种甲基八溴醚的制备方法 |
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CN115779960B (zh) * | 2022-11-15 | 2024-03-12 | 国家能源集团宁夏煤业有限责任公司 | 用于正构烃异构化的催化剂及其在费托蜡加氢转化过程中的应用 |
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