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A kind of macroporous kaolinite and its preparation and application

A technology for kaolinite and kaolinite, applied in the field of kaolinite and its preparation, can solve the problems of difficult filtration, small particle size of kaolinite, and high industrial production cost, and achieves good coke selectivity, high gasoline octane number, and heavy oil cracking. good effect

Active Publication Date: 2022-02-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the catalytic cracking catalyst is an acidic system, the alkali-modified kaolin must be fully washed and ion-exchanged to ensure that the alkali metal content of the matrix reaches a relatively low level. However, due to the small particle size of kaolin, it is difficult to filter. lead to high industrial production costs

Method used

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  • A kind of macroporous kaolinite and its preparation and application
  • A kind of macroporous kaolinite and its preparation and application
  • A kind of macroporous kaolinite and its preparation and application

Examples

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Effect test

preparation Embodiment 1

[0076] Kaolin A was roasted at 750° C. for 2 hours to obtain a roasted material (called the first roasted material), and 168 g (dry basis, the same below) of the roasted material was added to decationized water (pH=3.1, the same below) and stirred to prepare To form a slurry with a solid content of 25% by weight, add 500 g of hydrochloric acid and 100 g of oxalic acid, 1.5 g of stannous chloride, 2 g of cupric chloride, and 4 g of chromium chloride hexahydrate at a concentration of 1 mol / L, heat up to 70° C., and stir at 70° C. After 1 hour, remove the mother liquor by filtration, and dry the filter cake to obtain the product of the first step; 120 g of the product of the first step was roasted at 750° C. for 2 hours to obtain a roasted material (called the second roasted material), 100 g (dry basis, below Same) Add decationized water to the second roasting material and stir to obtain a slurry with a solid content of 25% by weight, add 200 g of hydrochloric acid, 50 g of oxalic...

preparation Embodiment 2

[0078]Kaolin A was roasted at 650° C. for 0.5 hour to obtain a roasted material (referred to as the first roasted material). 168 g of the first roasted material was added to decationized water and stirred to obtain a slurry with a solid content of 25% by weight. 500g of hydrochloric acid, 100g of oxalic acid, 1.5g of tin protochloride, 2g of cupric chloride, and 4g of chromium chloride hexahydrate, heated up to 70°C, stirred at 70°C for 1 hour, then filtered to remove the mother liquor, and the filter cake was dried to obtain the first The first step product; 120g of the first step product was roasted at 650°C for 0.5 hour to obtain a roasted material (called the second roasted material), and 100g of the second roasted material was added with acidic water (decationized water) and stirred to obtain a solid content of 25% by weight Add 200g of hydrochloric acid and 50g of oxalic acid, 50g of polyethylene glycol, 1g of tin protochloride, 1.2g of cupric chloride, 2.5g of chromium c...

preparation Embodiment 3

[0080] Roasting clay A at 750° C. for 2 hours to obtain a roasted material (called the first roasted material), 168 g of the first roasted material was added with deionized water and stirred to obtain a slurry with a solid content of 25% by weight. 500g of hydrochloric acid, 1g of stannous chloride, 1.5g of copper chloride, 4g of chromium chloride hexahydrate, heated up to 70°C, stirred at 70°C for 1 hour, then filtered to remove the mother liquor, and the filter cake was dried to obtain the product of the first step; 120 g of the product of the first step was roasted at 750° C. for 2 hours to obtain a roasted material (called the second roasted material), and 100 g of the second roasted material was added with deionized water and stirred to obtain a slurry with a solid content of 25% by weight. Add a concentration of 5 mol / 200g of L hydrochloric acid, 50g of polyethylene glycol, 1g of stannous chloride, 1.2g of cupric chloride, 2.5g of chromium chloride hexahydrate, heated to...

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Abstract

A kind of macroporous kaolinite and its preparation and application, the macroporous kaolinite contains the first modified metal compound, the average pore diameter is 2-50nm, and the pore volume of the pores whose pore diameter is 10-50nm accounts for the total pores More than 80% of the content, the first modified metal compound is one or more of tin, copper and chromium compounds. The preparation method of the macroporous kaolinite comprises: first roasting ordinary kaolin, forming a mixture of the first roasted kaolin, the first acidic solution, and the optional first modified metal compound, and performing the first treatment, It is then subjected to a second calcination, mixed with a second acidic solution, a pore-enlarging agent, and an optional first modified metal compound, subjected to a second treatment, filtered, and dried to obtain macroporous kaolinite, wherein at least one step introduces the The first modified metal compound. The macroporous kaolinite has high cracking activity and can be used to prepare cracking catalysts. The obtained catalyst has high gasoline yield and gasoline octane number and low coke selectivity.

Description

technical field [0001] The invention relates to a kaolinite with a macroporous structure, a preparation method and an application method thereof. Background technique [0002] With the gradual depletion of petroleum resources, the use of low-quality residual oil is a difficult problem for the oil refining industry, and how to improve the refining effect of low-quality residual oil is the top priority. Catalytic cracking (FCC) has always been the most important crude oil secondary processing method in my country's oil refining enterprises due to its strong adaptability to raw materials, high yield of light oil products, and high octane number of gasoline. Currently, catalytic cracking undertakes 75% of my country's gasoline, 35% of diesel and propylene, ethylene and other chemicals production tasks. The core of catalytic cracking is the catalytic cracking catalyst. The inferior quality of the catalytic cracking raw material will lead to the degradation of the performance of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/08C10G11/05
CPCC10G11/05B01J29/084
Inventor 张杰潇李家兴张万虹严加松田辉平
Owner CHINA PETROLEUM & CHEM CORP
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