Process for preparing cracking catalyst for hydrocarbons containing molecular sieves

A technology for cracking catalyst and molecular sieve hydrocarbon is applied in the field of preparation of hydrocarbon cracking catalyst, which can solve problems such as poor catalyst selectivity, and achieve the effects of low coke selectivity, high light oil selectivity and lower production cost.

Active Publication Date: 2005-11-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of pore size and pore diameter for the shortcoming that the catalyst pore size and pore diameter prepared by the above-mentioned existing cracking catalyst preparation method are 5-100 nanometers medium an

Method used

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Examples

Experimental program
Comparison scheme
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Example Embodiment

[0027] Example 1

[0028] This example illustrates the preparation method of the catalyst provided by the present invention.

[0029] Under stirring, mix 3.23 kg of deionized water and 1.6 kg of silica sol (product of Jiangyin Guolian Chemical Co., Ltd., with an average particle diameter of 15 nanometers, 95% of the silica sol particle diameter is between 8-22 nanometers, SiO 2 The content is 25% by weight), beating and mixing uniformly, and then adding 1.54 kg of kaolin (product of Suzhou Kaolin Company, solid content 78% by weight), 0.95 kg of aluminum sol (produced by Qilu Catalyst Factory, alumina content of 21% by weight), 1.29 kg of pseudo-thin Diaphragm (produced by Shandong Aluminum Factory, 62% by weight of alumina), 4.38 kg of molecular sieve of industrial grade DM-4 (produced by Qilu Catalyst Factory, unit cell constant of 24.45 angstroms, ultra-stable Y molecular sieve containing rare earth and magnesium, The mixed rare earth oxide conten...

Example Embodiment

[0030] Example 2

[0031] This example illustrates the preparation method of the catalyst provided by the present invention.

[0032] The catalyst was prepared according to the method of Example 1, except that the addition amount of deionized water was 1.36 kg, the addition amount of hydrochloric acid was 287 ml, and the order of addition of the components during beating was alumina sol, pseudo-boehmite, kaolin, Hydrochloric acid, silica sol and slurry containing DM-4 molecular sieve are used to obtain catalyst C2. Table 1 shows the dry basis composition of the slurry, the solid content of the slurry, and the molar ratio of acid to alumina provided by hydrated alumina. Table 3 shows the average pore diameter of catalyst C2, the pore volume of pores with a pore diameter of 5-100 nanometers, and the attrition index.

Example Embodiment

[0033] Example 3

[0034] This example illustrates the preparation method of the catalyst provided by the present invention.

[0035] The catalyst was prepared according to the method of Example 1, except that the addition amount of deionized water was 1.36 kg, the addition amount of hydrochloric acid was 287 ml, and the order of addition of the components during beating was pseudo-boehmite, alumina sol, kaolin, Hydrochloric acid, slurry containing DM-4 molecular sieve and silica sol to obtain catalyst C3. Table 1 shows the dry basis composition of the slurry, the solid content of the slurry, and the molar ratio of acid to alumina provided by hydrated alumina. Table 3 shows the average pore diameter of the catalyst C3, the pore volume of pores with a pore diameter of 5-100 nanometers, and the attrition index.

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Abstract

A method for preparation of olefin-cracking molecular sieve catalyst contains the following: mixing equably aluminium sol, hydrated alumina, clay, acid, molecular sieve with water to prepare a serous fluid of a solid content being 25-45 weight percent, drying, and adding a silicasol when beating, said silicasol being the particles of an average diameter of 5-100 nanometers, and over 80percent of the particle diameter being 0.5-1.5 times to average diameter, when beating adding inorganic acid after aluminium sol and hydrated alumina. The catalyst prepared in the method has a big average hole diameter, and the middle big holes of a diameter of 5-100 nanometers have a bigger hole bulk, which having a high selectivity to light oil and a low selectivity to coke.

Description

technical field [0001] The present invention relates to a preparation method of a hydrocarbon cracking catalyst, more specifically, a preparation method of a hydrocarbon cracking catalyst containing molecular sieves. Background technique [0002] In recent years, the heavy tendency of catalytic cracking raw materials has become increasingly serious, and macromolecular substances such as colloids and asphaltenes in raw materials have relatively large molecular diameters. When the catalyst lacks medium and large pores, these macromolecular substances are not only difficult to convert into light oil, but also easily generate coke and dry gas on the surface of the catalyst, resulting in poor selectivity of the catalyst, that is, the selectivity of coke is high. Light oils, i.e. diesel and gasoline, are less selective. Increasing the pore size and medium and large pore volume of the cracking catalyst is an important means to improve the selectivity of...

Claims

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Application Information

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IPC IPC(8): C10G11/05
Inventor 严加松龙军田辉平周灵萍王振波许明德张万虹
Owner CHINA PETROLEUM & CHEM CORP
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