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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 and large pore volume is relatively small, and the selectivity of the catalyst is not good. Preparation method of molecular sieve-containing hydrocarbon cracking catalyst with large volume of medium and large pores with a diameter of 5-100 nanometers and good selectivity

Method used

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Examples

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example 1

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

[0029] Under stirring, 3.23 kilograms of deionized water and 1.6 kilograms of silica sol (Jiangyin Guolian Chemical Co., Ltd. product, the average particle diameter is 15 nanometers, 95% of the silica sol particle diameter is between 8-22 nanometers, SiO 2 content is 25% by weight) beating and mixing evenly, add 1.54 kg of kaolin (Suzhou Kaolin Company product, solid content 78% by weight), 0.95 kg of aluminum sol (produced by Qilu Catalyst Factory, aluminum oxide content 21% by weight), 1.29 kg of pseudo thin Diaspore (produced by Shandong Aluminum Factory, aluminum oxide content 62% by weight), 4.38 kilograms of molecular sieves (produced by Qilu Catalyst Factory, unit cell constant is 24.45 angstroms, ultra-stable Y molecular sieve containing rare earth and magnesium, the industrial grade is DM-4, The content of mixed rare earth oxides is 3.0% by weight, wherein the content of lanth...

example 2

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

[0032] Prepare catalyst by the method for example 1, difference is that the add-on of deionized water is 1.36 kilograms, and the add-on of hydrochloric acid is 287 milliliters, and the order of adding each component during beating is aluminum sol, pseudo-boehmite, kaolin, Hydrochloric acid, silica sol and slurry containing DM-4 molecular sieves 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 the acid to the alumina provided by the hydrated alumina. Table 3 gives the average pore diameter, pore volume and attrition index of catalyst C2 with a pore diameter of 5-100 nanometers.

example 3

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

[0035] Prepare catalyst by the method for example 1, difference is, the add-on of deionized water is 1.36 kilograms, and the add-on of hydrochloric acid is 287 milliliters, and the adding order of each component is 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 the acid to the alumina provided by the hydrated alumina. Table 3 gives the average pore diameter, pore volume and attrition index of catalyst C3 with a pore diameter of 5-100 nanometers.

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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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