CN114733557A - 一种催化裂化汽油辛烷值助剂的制备方法 - Google Patents
一种催化裂化汽油辛烷值助剂的制备方法 Download PDFInfo
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- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000012752 auxiliary agent Substances 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 238000004523 catalytic cracking Methods 0.000 claims abstract description 12
- 239000002253 acid Substances 0.000 claims abstract description 9
- 239000002808 molecular sieve Substances 0.000 claims description 23
- 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 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 15
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- OVGXLJDWSLQDRT-UHFFFAOYSA-L magnesium lactate Chemical compound [Mg+2].CC(O)C([O-])=O.CC(O)C([O-])=O OVGXLJDWSLQDRT-UHFFFAOYSA-L 0.000 claims description 10
- 229960004658 magnesium lactate Drugs 0.000 claims description 10
- 235000015229 magnesium lactate Nutrition 0.000 claims description 10
- 239000000626 magnesium lactate Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000004537 pulping Methods 0.000 claims description 10
- 229960005336 magnesium citrate Drugs 0.000 claims description 9
- 235000002538 magnesium citrate Nutrition 0.000 claims description 9
- 239000004337 magnesium citrate Substances 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 239000011863 silicon-based powder Substances 0.000 claims description 9
- PLSARIKBYIPYPF-UHFFFAOYSA-H trimagnesium dicitrate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O.[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O PLSARIKBYIPYPF-UHFFFAOYSA-H 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 7
- 238000001694 spray drying Methods 0.000 claims description 7
- 239000011777 magnesium Substances 0.000 claims description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 5
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- 229940091250 magnesium supplement Drugs 0.000 claims description 5
- 229910052681 coesite Inorganic materials 0.000 claims description 4
- 229910052906 cristobalite Inorganic materials 0.000 claims description 4
- 229910052682 stishovite Inorganic materials 0.000 claims description 4
- 229910052905 tridymite Inorganic materials 0.000 claims description 4
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 3
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 238000004090 dissolution Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 239000011574 phosphorus Substances 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 3
- 239000011159 matrix material Substances 0.000 abstract description 7
- 239000011148 porous material Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005899 aromatization reaction Methods 0.000 abstract description 2
- 238000006317 isomerization reaction Methods 0.000 abstract description 2
- 239000002010 green coke Substances 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 8
- 238000005336 cracking Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000005995 Aluminium silicate Substances 0.000 description 3
- 235000012211 aluminium silicate Nutrition 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 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 3
- 239000000203 mixture Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 description 2
- 238000010009 beating Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- WQEVDHBJGNOKKO-UHFFFAOYSA-K vanadic acid Chemical compound O[V](O)(O)=O WQEVDHBJGNOKKO-UHFFFAOYSA-K 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- URRHWTYOQNLUKY-UHFFFAOYSA-N [AlH3].[P] Chemical compound [AlH3].[P] URRHWTYOQNLUKY-UHFFFAOYSA-N 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 229910052675 erionite Inorganic materials 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/40—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
- 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
- B01J29/405—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 containing rare earth elements, titanium, zirconium, hafnium, zinc, cadmium, mercury, gallium, indium, thallium, tin or lead
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G11/02—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils characterised by the catalyst used
- C10G11/04—Oxides
- C10G11/05—Crystalline alumino-silicates, e.g. molecular sieves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/16—After treatment, characterised by the effect to be obtained to increase the Si/Al ratio; Dealumination
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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
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
- B01J2229/186—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself not in framework positions
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- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/20—After treatment, characterised by the effect to be obtained to introduce other elements in the catalyst composition comprising the molecular sieve, but not specially in or on the molecular sieve itself
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/20—Characteristics of the feedstock or the products
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Abstract
本发明公开了一种催化裂化汽油辛烷值助剂的制备方法。通过控制ZSM‑5外表面酸性中心数量，使用低活性基质，降低生焦堵塞孔道，据此制备出的辛烷值助剂具有低液化气增长率，高的异构、芳构化能力，能够明显提高汽油辛烷值。
Description
技术领域
本发明属于催化剂技术领域，具体涉及一种催化裂化汽油辛烷值助剂的制备方法。
背景技术
汽油辛烷值是衡量车用汽油的一项重要指标，如果不达标，汽油可能在气缸中发生爆炸，机器振动加剧，输出功率降低，机件受损。在我国汽油的70％都来自炼厂的催化裂化装置，但汽油的辛烷值偏低，为了追求更高的汽油辛烷值，可以使用高温短接触的操作或使用含有超稳分子筛的催化剂，也可以使用高硅铝比的ZSM-5辛烷值助剂来实现，已有大量的专利报道。
专利CN111686790A介绍了一种低液化气产率催化裂化汽油辛烷值助剂的制备方法，将ZSM-5使用镁盐和尿素进行改性处理，然后将改性ZSM-5分子筛浆液和基质浆液混合、打浆后经喷雾干燥成型即得催化裂化汽油辛烷值助剂。
专利CN111939970A公开了一种提高催化裂化汽油辛烷值助剂的制备方法，包括将高岭土碱处理和焙烧，然后用于晶化制备ZSM-5分子筛；将改性ZSM-5分子筛、粘结剂、助剂、去离子水搅拌混合形成浆液，喷雾干燥，焙烧制得增产催化裂化汽油辛烷值助剂。通过该发明制备的汽油辛烷值助剂用于催化裂化过程，能够有效地提高汽油辛烷值。
专利CN107224991B公开了一种提高催化裂化汽油辛烷值助剂及其制备方法，采用硅铝比大于等于200的Y型分子筛、ZSM型分子筛、β型分子筛、或者毛沸石中的任意一种或几种，添加非金属活性物质、粘结剂一起制备出一种催化裂化提高汽油辛烷值助剂。
US4552648报道了用水热预处理的方法来降低ZSM-5分子筛的晶胞尺寸，进而减少汽油产率的下降幅度。
综上所述，目前ZSM-5分子筛仍然是辛烷值助剂主要的活性组分。主要研究方向是通过分子筛改性。选择合适的基质材料，降低汽油产率损失。但目前的助剂仍存在以下问题。(1)选择性差。仍然是通过裂解汽油直链组分来提高辛烷值，同时液化气产率增加：(2)容易中毒失活，本身高硅铝比ZSM-5分子筛的酸性中心数量就是比较少，如果被钒酸破坏后就失去了原有的作用；(3)孔道易积碳失活，助剂本身是各组分混合后喷雾制成的直径60μm～90μm的颗粒物，是由各组份颗粒堆积粘结而成，因此必须保证孔道畅通，汽油分子才能进入颗粒内部，充分利用更多的ZSM-5分子筛的裂解性能。如果基质或组分外表面有过多的裂化反应，就会迅速积碳，堵塞孔道，降低整体活性组分的利用率。
发明内容
针对上述问题，本发明提供了一种催化裂化辛烷值助剂的制备方法。其具体制备方案如下：
(1)将ZSM-5分子筛用水打浆，加入柠檬酸镁或乳酸镁，过滤、焙烧；
(2)将硅粉磨细，控制D50≤3.0μm，D90≤10.0μm；
(3)将焙烧后的ZSM-5、硅粉、硅溶胶混合打浆，喷雾干燥得到标题物；
本发明提供的制备方法所述步骤(1)中ZSM-5硅铝比在60～100之间，可以是氢型、磷改性、锌改性的一种或几种，要求Na2O≤0.05wt％。
本发明提供的制备方法所述步骤(1)中柠檬酸镁或乳酸镁的加入量，以镁计，其与ZSM-5分子筛的质量比为(0.01～0.05)：1。
本发明提供的制备方法所述步骤(1)中焙烧温度应大于600℃，焙烧气氛为空气和水蒸气。
本发明提供的制备方法所述步骤(2)中硅粉来自废催化裂化催化剂酸溶处理后的滤渣，SiO2含量大于98.5％。
本发明提供的制备方法所述步骤(3)中的硅溶胶的加入量以SiO2计，与标题物的质量比为(0.15～0.30)：1，硅溶胶的SiO2含量应大于30wt％，其粒径D50在20～30nm之间。
与现有技术相比，本发明的有益效果是：
使用柠檬酸镁或乳酸镁处理ZSM-5分子筛分子筛，控制镁的比例，有机物本身长链的空间结构可以有选择性的将ZSM-5分子筛的外表面的酸性中心交换，通过焙烧，使其失去裂解活性，Mg可以转换成MgO，具有一定的抗钒性能，保护ZSM-5的酸性中心，而孔道具有筛分作用，对反应物和产物均可以加以控制。选择合适硅铝比的ZSM-5，即相当选择了合适的酸性中心数和分布，加强其异构化和芳构化的性能，控制其裂解性能，可实现少产液化气的目的。
使用硅粉作为惰性基质，既可以拓展废催化裂化催化剂的应用场所，又能控制原料油在基质上的裂化，减少积碳，保持辛烷值助剂颗粒内部孔道的畅通，有利于充分利用颗粒内部分散的ZSM-5分布。使用硅溶胶作为粘结剂，也是为了避免使用铝溶胶、磷铝胶或酸化拟薄水铝石时，活性氧化铝的L型酸性中心的裂解积碳。
综上所述，本发明通过控制ZSM-5分子筛的外表面酸性中心数，选择合适硅铝比的ZSM-5分子筛，使用惰性基质硅粉和硅溶胶粘结剂制备出的辛烷值助剂，可以少增加液化气的同时大幅度提高辛烷值。
具体实施方式
以下对本发明的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本发明，并非用于限定发明专利的范围。
本发明所用原料的数据如下：
柠檬酸镁：Mg2+＝11.75wt％，乳酸镁：Mg2+＝9.36wt％，
硅溶胶：SiO2＝30.0wt％，粒径D50为30nm
ZSM-5-①：硅铝比为80，氢型，Na2O＝0.01wt％
ZSM-5-②：硅铝比为80，P改性ZSM-5，P2O5＝1.0wt％
ZSM-5-③：硅铝比为80，P/Zn改性ZSM-5，P2O5＝0.5wt％，ZnO＝0.2wt％
评价所用原料油的性质如下：
实施例1
(1)将ZSM-5-①加水打浆，加入柠檬酸镁，Mg2+/ZSM-5-①质量比为0.02，650℃水热焙烧1小时；
(2)按照配比：ZSM-5-①：硅粉：硅溶胶＝35：45：20混合打浆，喷雾干燥得到标题物1。
实施例2
(1)将ZSM-5-②加水打浆，加入乳酸镁，Mg2+/ZSM-5-②质量比为0.04，600℃水热焙烧1.5小时；
(2)按照配比：ZSM-5-②：硅粉：硅溶胶＝35：48：17混合打浆，喷雾干燥得到标题物2。
实施例3
(1)将ZSM-5-③加水打浆，加入乳酸镁，Mg2+/ZSM-5-③质量比为0.03，600℃水热焙烧1.5小时；
(2)按照配比：ZSM-5-③：硅粉：硅溶胶＝35：50：15混合打浆，喷雾干燥得到标题物3。
对比例1
(1)按照配比：ZSM-5-①：磷铝胶：高岭土＝35：18：47混合打浆，混合打浆，喷雾干燥得到对比物1。
对比例2
(1)按照配比：ZSM-5-①：铝溶胶：拟薄水铝石：高岭土＝35：5：15：45混合打浆，喷雾干燥得到对比物2。
将实施物以及对比物与本公司生产的AIC-950按照质量比为为1:19进行复配，在ACE-AP装置上进行性能评价，复配剂先经过800℃，100％水蒸气条件下处理17小时，反应温度为527℃。将评价数据汇总于下表；
从评价数据结果来看，空白样的汽油辛烷值为89.9，添加了实施物后，汽油的辛烷值分别为92.90、93.80、94.10，而液化气差率增加并不明显。通过本专利所述方法制备的辛烷值助剂能够明显提升汽油辛烷值；而且与对比物相比，汽油辛烷值的提升也具有一定的优势。
Claims (6)
1.一种催化裂化汽油辛烷值助剂的制备方法，其具体步骤如下：
(1)将ZSM-5分子筛用水打浆，加入柠檬酸镁或乳酸镁，过滤、焙烧；
(2)将硅粉磨细，控制D50≤3.0μm，D90≤10.0μm；
(3)将焙烧后的ZSM-5、硅粉、硅溶胶混合打浆，喷雾干燥得到标题物。
2.根据权利要求1所述的方法，其特征在于：步骤(1)中ZSM-5硅铝比在60～100之间，可以是氢型和/或磷改性、锌改性的ZSM-5，要求Na2O≤0.05wt％。
3.根据权利要求1所述的方法，其特征在于：步骤(1)中柠檬酸镁或乳酸镁的加入量，以镁计，其与ZSM-5分子筛的质量比为(0.01～0.05)：1。
4.根据权利要求1所述的方法，其特征在于：步骤(1)中焙烧温度应大于600℃，焙烧气氛为空气和水蒸气。
5.根据权利要求1所述的方法，其特征在于：步骤(2)中硅粉来自废催化裂化催化剂酸溶处理后的滤渣，SiO2含量大于98.5％。
6.根据权利要求1所述的方法，其特征在于：步骤(3)中的硅溶胶的加入量以SiO2计，与标题物的质量比为(0.15～0.30)：1，硅溶胶的SiO2含量应大于30wt％，其粒径D50在20～30nm之间。
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| CN111686790A (zh) * | 2019-03-12 | 2020-09-22 | 中国石油天然气股份有限公司 | 一种低液化气产率催化裂化汽油辛烷值助剂及其制备方法 |
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| CN111686790A (zh) * | 2019-03-12 | 2020-09-22 | 中国石油天然气股份有限公司 | 一种低液化气产率催化裂化汽油辛烷值助剂及其制备方法 |
| CN111686791A (zh) * | 2019-03-12 | 2020-09-22 | 中国石油天然气股份有限公司 | 一种催化裂化汽油辛烷值助剂及其制备方法 |
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