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A kind of macroporous kaolinite and its preparation and application

A kaolinite and kaolin technology, applied in the field of kaolinite and its preparation, can solve the problems of difficult filtration, high industrial production cost, and small kaolin particle size

Active Publication Date: 2021-01-08
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 500g of hydrochloric acid with a concentration of 1mol / L, 100g of oxalic acid, and 12.00g of magnesium chloride, heat up to 70°C, stir for 1 hour, then filter to remove the mother liquor, and dry the filter cake to obtain the first step Product; 120g of the first step product was roasted at 750°C for 2 hours to obtain a roasted material (called the second roasted material), and 100g (dry basis, the same below) was added to the second roasted material and stirred with decationized water to obtain a solid content of 25 Add 200g of hydrochloric acid, 50g of oxalic acid, 50g of polyethylene glycol, and 5.00g of magnesium chloride with a concentration of 1mol / L to the s...

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, 100g of oxalic acid, and 12.00g of magnesium chloride are heated 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 hours to obtain Roasted material (referred to as 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, adding 200g of hydrochloric acid and 50g of oxalic acid with a concentration of 1mol / L, polyethylene glycol Diol 50g, magnesium chloride 5.00g, heat up to 70°C, stir for 1 hour, then filter to remove ...

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. Hydrochloric acid 500g, magnesium chloride 12.00g, be warming up to 70 ℃, stirring time 1 hour, then filter and remove mother liquor, filter cake oven dry, obtain the first step product; 120g first step product 120g were roasted at 750 ℃ ​​for 2 hours to obtain roasted material ( (referred to as the second roasting material), 100g of the second roasting material is added with deionized water and stirred to obtain a slurry with a solid content of 25% by weight, adding 200g of hydrochloric acid, 50g of polyethylene glycol, and 5.00g of magnesium chloride with a concentration of 5mol / L, and heating up to 70°C, stirred for 1 hour, then filtered to remove the mother liquor, and dried the filter cake to obtain kaolinite D with a macroporou...

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Abstract

The invention relates to macroporous kaolinite, a preparation method and applications thereof, wherein the macroporous kaolinite contains a modified metal, and has an average pore diameter of 2-50 nm,the pore volume of the pores with a pore diameter of 10-50 nm accounts for more than 80% of the total pore volume, and the modified metal is one or a plurality of materials selected from alkaline earth metals, titanium and zirconium. The preparation method of the macroporous kaolinite comprises: carrying out first calcining on kaolin; forming a mixture from the calcined kaolin, a first acid, water and an optionally modified metal compound, and carrying out first treatment; carrying out second calcination, forming a mixture from the calcined material, a second acid, water, a pore expander andan optionally modified metal compound, and carrying out second treatment; and filtering, and drying to obtain the macroporous kaolinite, wherein the modified metal compound is added to at least one ofthe first treatment and the second treatment. According to the present invention, the macroporous kaolinite can be used for preparing cracking catalysts, and the obtained catalyst has advantages of high conversion activity of heavy oil, high yield of gasoline and liquefied gas, low selectivity of dry gas, and low selectivity of coke.

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): B01J35/10
CPCB01J29/088B01J29/70B01J29/80B01J35/1038C10G11/02C10G2300/1037
Inventor 田辉平张杰潇张万虹李家兴严加松
Owner CHINA PETROLEUM & CHEM CORP
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