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A kind of macroporous kaolinite and its preparation and application

A technology of kaolinite and kaolin, which is applied in the field of kaolinite and its preparation, can solve the problems of small kaolin particle size, high industrial production cost, and difficult filtration, and achieve high yield of light oil and gasoline yield High, low coke selectivity effect

Active Publication Date: 2021-11-16
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

Experimental program
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Effect test

preparation Embodiment 1

[0068] Kaolin A was roasted at 750°C for 2 hours to obtain a roasted material (called the first roasted material), and 168g (dry basis, the same below) of the first roasted material was added to decationized water (pH=3.1, the same below) and stirred , to make a slurry with a solid content of 25% by weight, add 500 g of hydrochloric acid and 100 g of oxalic acid with a concentration of 1 mol / L, heat up to 70° C., stir for 1 hour, then filter to remove the mother liquor, and dry the filter cake to obtain the product of the first step; 120 g of the first step product was roasted at 750° C. for 2 hours to obtain a roasted material (called the second roasted material), and 100 g (dry basis, the same below) of the second roasted material was added with decationized water and stirred to obtain a solid content of 25% by weight. Add 200 g of hydrochloric acid, 50 g of oxalic acid, and 50 g of polyethylene glycol at a concentration of 1 mol / L to the slurry, heat up to 70° C., stir for 1...

preparation Embodiment 2

[0072] 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 and 100g of oxalic acid are heated up to 70°C, stirred for 1 hour, then filtered to remove the mother liquor, and the filter cake is dried to obtain the product of the first step; 120g of the product of the first step is roasted at 650°C for 0.5 hour to obtain a roasted material (weighing is the second roasted material), 100g of the second roasted material is added acidic water (decationized water) and stirred to obtain a slurry with a solid content of 25% by weight, 200g of hydrochloric acid, 50g of oxalic acid, and 50g of polyethylene glycol with a concentration of 1mol / L were added, The temperature was raised to 70°C, the stirring time was 1 hour, and then the mother liquor was removed by f...

preparation Embodiment 3

[0074] 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, be warming up to 70 DEG C, stirring time 1 hour, filter and remove mother liquor then, filter cake drying, obtain the first step product; 120g of the first step product are roasted at 750 DEG C for 2 hours to obtain roasted material (called the second roasted material), 100g of the second roasted material was added with deionized water and stirred to obtain a slurry with a solid content of 25% by weight, 200g of hydrochloric acid and 50g of polyethylene glycol with a concentration of 5mol / L were added, the temperature was raised to 70°C, and the stirring time was 1 hour. Then the mother liquor was removed by filtration, and the filter cake was dried to obtain kaolinite D with a macroporous structure. The pa...

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Abstract

A kind of macroporous kaolinite and its preparation and application, the average pore diameter of the macroporous structure kaolinite is 2-50nm, and the pore volume of the pores whose pore diameter is 10-50nm in the macroporous structure kaolinite Accounting for more than 80% of the total pore volume. A method for preparing kaolinite with a macroporous structure, comprising the following steps: first roasting kaolin at 650-800°C for 0.5-3 hours, then treating it in an acidic solution, and then roasting at 650-800°C for 0.5-3 hours The second calcination was carried out for 3 hours, and then treated in an acid solution in the presence of a pore-enlarging agent, filtered, and dried. The macroporous kaolinite is used as a catalytic cracking catalyst, which can improve the cracking performance of the catalyst, improve the anti-coking ability, and improve the anti-metal pollution performance.

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): B01J21/16B01J35/10B01J37/02B01J37/08C10G11/05
CPCB01J21/16B01J35/1019B01J35/1038B01J35/1061B01J37/024B01J37/082C10G11/05
Inventor 张杰潇周治李家兴张万虹严加松田辉平
Owner CHINA PETROLEUM & CHEM CORP
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