CN109133091A - 一种介孔zsm-5沸石的制备及成型方法 - Google Patents
一种介孔zsm-5沸石的制备及成型方法 Download PDFInfo
- Publication number
- CN109133091A CN109133091A CN201710497557.4A CN201710497557A CN109133091A CN 109133091 A CN109133091 A CN 109133091A CN 201710497557 A CN201710497557 A CN 201710497557A CN 109133091 A CN109133091 A CN 109133091A
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- Prior art keywords
- zeolite
- mesoporous
- zsm
- hours
- follows
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010457 zeolite Substances 0.000 title claims abstract description 80
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 229910021536 Zeolite Inorganic materials 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000002425 crystallisation Methods 0.000 claims abstract description 30
- 230000008025 crystallization Effects 0.000 claims abstract description 30
- 229920001577 copolymer Polymers 0.000 claims abstract description 24
- 239000003054 catalyst Substances 0.000 claims abstract description 20
- 238000000465 moulding Methods 0.000 claims abstract description 20
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims abstract description 10
- GQOKIYDTHHZSCJ-UHFFFAOYSA-M dimethyl-bis(prop-2-enyl)azanium;chloride Chemical compound [Cl-].C=CC[N+](C)(C)CC=C GQOKIYDTHHZSCJ-UHFFFAOYSA-M 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 229910001868 water Inorganic materials 0.000 claims description 26
- 239000000243 solution Substances 0.000 claims description 25
- 238000001035 drying Methods 0.000 claims description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- 229910052593 corundum Inorganic materials 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 18
- 239000000126 substance Substances 0.000 claims description 18
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 18
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 17
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 17
- 239000007864 aqueous solution Substances 0.000 claims description 14
- 229910052681 coesite Inorganic materials 0.000 claims description 10
- 229910052906 cristobalite Inorganic materials 0.000 claims description 10
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- 229910052682 stishovite Inorganic materials 0.000 claims description 10
- 229910052905 tridymite Inorganic materials 0.000 claims description 10
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 9
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 9
- 229910017604 nitric acid Inorganic materials 0.000 claims description 9
- 239000011148 porous material Substances 0.000 claims description 9
- 235000019353 potassium silicate Nutrition 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 9
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 9
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [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 8
- 238000001354 calcination Methods 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000012456 homogeneous solution Substances 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000002808 molecular sieve Substances 0.000 claims description 4
- PZNOBXVHZYGUEX-UHFFFAOYSA-N n-prop-2-enylprop-2-en-1-amine;hydrochloride Chemical compound Cl.C=CCNCC=C PZNOBXVHZYGUEX-UHFFFAOYSA-N 0.000 claims description 4
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 4
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 2
- 229920002554 vinyl polymer Polymers 0.000 claims description 2
- 244000275012 Sesbania cannabina Species 0.000 claims 1
- QQQSFSZALRVCSZ-UHFFFAOYSA-N triethoxysilane Chemical compound CCO[SiH](OCC)OCC QQQSFSZALRVCSZ-UHFFFAOYSA-N 0.000 claims 1
- 229920000642 polymer Polymers 0.000 abstract description 4
- 238000009776 industrial production Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000001125 extrusion Methods 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 239000000499 gel Substances 0.000 description 23
- 230000015572 biosynthetic process Effects 0.000 description 12
- 238000003786 synthesis reaction Methods 0.000 description 12
- 230000014759 maintenance of location Effects 0.000 description 11
- 238000002242 deionisation method Methods 0.000 description 8
- 241000219782 Sesbania Species 0.000 description 7
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 6
- 239000000460 chlorine Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000004898 kneading Methods 0.000 description 5
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 5
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 description 3
- 235000019270 ammonium chloride Nutrition 0.000 description 3
- 238000007334 copolymerization reaction Methods 0.000 description 3
- YIOJGTBNHQAVBO-UHFFFAOYSA-N dimethyl-bis(prop-2-enyl)azanium Chemical compound C=CC[N+](C)(C)CC=C YIOJGTBNHQAVBO-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 238000010189 synthetic method Methods 0.000 description 3
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- -1 Plate Chemical compound 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- PYGSKMBEVAICCR-UHFFFAOYSA-N hexa-1,5-diene Chemical group C=CCCC=C PYGSKMBEVAICCR-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- GRVDJDISBSALJP-UHFFFAOYSA-N methyloxidanyl Chemical compound [O]C GRVDJDISBSALJP-UHFFFAOYSA-N 0.000 description 2
- 229920000371 poly(diallyldimethylammonium chloride) polymer Polymers 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 125000001453 quaternary ammonium group Chemical group 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- LPSKDVINWQNWFE-UHFFFAOYSA-M tetrapropylazanium;hydroxide Chemical compound [OH-].CCC[N+](CCC)(CCC)CCC LPSKDVINWQNWFE-UHFFFAOYSA-M 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 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 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- 229920000289 Polyquaternium Polymers 0.000 description 1
- 229920006322 acrylamide copolymer Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000002134 carbon nanofiber Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 229920006317 cationic polymer Polymers 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000004968 peroxymonosulfuric acids Chemical class 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- WGYKZJWCGVVSQN-UHFFFAOYSA-O propan-1-aminium Chemical compound CCC[NH3+] WGYKZJWCGVVSQN-UHFFFAOYSA-O 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000002444 silanisation Methods 0.000 description 1
- 125000004469 siloxy group Chemical group [SiH3]O* 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- 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
- C01B39/40—Type ZSM-5 using at least one organic template directing agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/14—Pore volume
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/16—Pore diameter
- C01P2006/17—Pore diameter distribution
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Catalysts (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
Description
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201710497557.4A CN109133091B (zh) | 2017-06-27 | 2017-06-27 | 一种介孔zsm-5沸石的制备及成型方法 |
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CN201710497557.4A CN109133091B (zh) | 2017-06-27 | 2017-06-27 | 一种介孔zsm-5沸石的制备及成型方法 |
Publications (2)
Publication Number | Publication Date |
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CN109133091A true CN109133091A (zh) | 2019-01-04 |
CN109133091B CN109133091B (zh) | 2020-05-19 |
Family
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CN201710497557.4A Active CN109133091B (zh) | 2017-06-27 | 2017-06-27 | 一种介孔zsm-5沸石的制备及成型方法 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109775721A (zh) * | 2017-11-14 | 2019-05-21 | 中国石油化工股份有限公司 | 一种介孔zsm-5沸石及其制备方法和应用 |
CN115364893A (zh) * | 2022-08-08 | 2022-11-22 | 蚌埠学院 | 一种beta-zsm复合型多级孔分子筛的制备方法及其应用 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020151758A1 (en) * | 2001-01-23 | 2002-10-17 | Indian Petrochemicals Corporation Limited | Selectivated metallosilicate catalyst composite for alkylaromatic conversion, process for the preparation thereof, and use thereof in hydrocarbon conversion |
CN102416344A (zh) * | 2011-10-20 | 2012-04-18 | 中国石油天然气集团公司 | 梯级孔zsm-5沸石复合材料基fcc汽油低温硫转移催化剂的制法 |
CN103007983A (zh) * | 2012-10-08 | 2013-04-03 | 太原理工大学 | 一种用于甲醇制汽油的hzsm-5分子筛催化剂及其制备方法和应用 |
WO2013098573A1 (en) * | 2011-12-29 | 2013-07-04 | Plantaco Logisztikai Szolgáltató Kft. | Soil and plant conditioner products |
CN103787368A (zh) * | 2013-12-30 | 2014-05-14 | 温州大学 | 介孔zsm-5沸石、介孔zsm-5沸石负载金属硫化物催化剂以及应用 |
CN104437602A (zh) * | 2014-12-16 | 2015-03-25 | 湖南科技大学 | 一种多级介孔zsm-5催化剂及其制备和应用方法 |
-
2017
- 2017-06-27 CN CN201710497557.4A patent/CN109133091B/zh active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020151758A1 (en) * | 2001-01-23 | 2002-10-17 | Indian Petrochemicals Corporation Limited | Selectivated metallosilicate catalyst composite for alkylaromatic conversion, process for the preparation thereof, and use thereof in hydrocarbon conversion |
CN102416344A (zh) * | 2011-10-20 | 2012-04-18 | 中国石油天然气集团公司 | 梯级孔zsm-5沸石复合材料基fcc汽油低温硫转移催化剂的制法 |
WO2013098573A1 (en) * | 2011-12-29 | 2013-07-04 | Plantaco Logisztikai Szolgáltató Kft. | Soil and plant conditioner products |
CN103007983A (zh) * | 2012-10-08 | 2013-04-03 | 太原理工大学 | 一种用于甲醇制汽油的hzsm-5分子筛催化剂及其制备方法和应用 |
CN103787368A (zh) * | 2013-12-30 | 2014-05-14 | 温州大学 | 介孔zsm-5沸石、介孔zsm-5沸石负载金属硫化物催化剂以及应用 |
CN104437602A (zh) * | 2014-12-16 | 2015-03-25 | 湖南科技大学 | 一种多级介孔zsm-5催化剂及其制备和应用方法 |
Non-Patent Citations (1)
Title |
---|
姜新鸽等: "聚合物中分子筛的合成", 《材料导报A》 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109775721A (zh) * | 2017-11-14 | 2019-05-21 | 中国石油化工股份有限公司 | 一种介孔zsm-5沸石及其制备方法和应用 |
CN109775721B (zh) * | 2017-11-14 | 2022-08-12 | 中国石油化工股份有限公司 | 一种介孔zsm-5沸石及其制备方法和应用 |
CN115364893A (zh) * | 2022-08-08 | 2022-11-22 | 蚌埠学院 | 一种beta-zsm复合型多级孔分子筛的制备方法及其应用 |
CN115364893B (zh) * | 2022-08-08 | 2023-09-15 | 蚌埠学院 | 一种beta-zsm复合型多级孔分子筛的制备方法及其应用 |
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Publication number | Publication date |
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CN109133091B (zh) | 2020-05-19 |
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