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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 low dry gas selectivity, high and medium pore content, and high total pore size. volume 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

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0075] 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 with a concentration of 1 mol / L, stir for 10 minutes, then add 7.6 mL of rare earth solution under stirring, heat up to 70 ° C, stir for 1 hour, then filter to remove the mother liquor, filter The cake is dried to obtain the first step product; 120g of the first step product is roasted at 750°C for 2 hours to obtain a roasted material (called the second roasted material), and 100g (dry basis, the same below) is added to the second roasted material for decationization Stir with water to obtain a slurry with a solid content of 25% by weight, add 200 g of hydrochloric acid, 50 g of oxalic acid, and 50 g of polyethyle...

preparation Embodiment 2

[0077] 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, stirred for 10 minutes, then added 7.6mL of rare earth solution while stirring, raised the temperature to 70°C, stirred for 1 hour, then filtered to remove the mother liquor, and dried the filter cake to obtain the first step product; 120g of the first step product Roast at 650° C. for 0.5 hour to obtain a roasted material (called the second roasted material), add acidic water (decationized water) to 100 g of the second roasted material and stir to obtain a slurry with a solid content of 25% by weight, and add a concentration of 1mol / L 200g of hydrochloric acid, 50g of oxalic acid, and 50g of polyethylene glycol were stirred for 7 minutes, then 4.5mL of rare earth solu...

preparation Embodiment 3

[0079] 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, stirred for 10 minutes, then added 7.6mL of rare earth solution under stirring, raised the temperature to 70°C, stirred for 1 hour, then filtered to remove the mother liquor, and dried the filter cake to obtain the first step product; 120g of the first step product was heated at 750°C Lower roasting 2 hours obtains roasted material (called the second roasted material), 100g of the second roasted material is added deionized water and stirred, obtains the slurry that solid content is 25% by weight, adds the hydrochloric acid 200g of concentration 5mol / L, polyethylene glycol 50g, stirred for 7 minutes, then added 4.5mL of rare earth solution under stirring, raised the temperature to 70°C, stirred for 1 hour, t...

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Abstract

A kind of macroporous kaolinite and its preparation and application, the macroporous kaolinite contains rare earth, the average pore diameter is 2-50nm, and the pore volume of the pores with a pore diameter of 10-50nm accounts for more than 80% of the total pore volume . The preparation method of the macroporous kaolinite comprises the following steps: first roasting the kaolin, forming a mixture of the kaolin after the first roasting, the first acidic solution, and an optional rare earth compound, performing the first treatment, and then performing The second roasting, and then mixing with the second acidic solution, pore-enlarging agent, and optional rare earth compound, performing the second treatment, filtering, and drying to obtain macroporous kaolinite, wherein at least one step of the first treatment and the second treatment Introduce rare earth compounds. The macroporous kaolinite has high cracking activity and is used as a catalyst cracking catalyst to replace clay. Under the premise of equivalent rare earth content, the coke selectivity is better, the anti-heavy metal pollution ability is strong, and the gasoline yield is high.

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): B01J27/055B01J29/70B01J35/10C10G11/05
CPCC10G11/05B01J23/002B01J27/055B01J29/7049B01J2229/18B01J35/633B01J35/647B01J35/615
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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