A kind of macroporous kaolinite and its preparation and application

A technology of kaolinite and kaolinite, applied in the field of kaolinite and its preparation, can solve the problems of small particle size of kaolinite, difficult filtration, high industrial production cost, and achieve high liquefied gas yield, good coke selectivity, and high total cost. Effect of Pore Volume

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
Comparison scheme
Effect test

preparation Embodiment 1

[0076] The kaolin A was calcined at 750° C. for 2 hours to obtain a calcined material (referred to as the first calcined material), and 168 g (dry basis, the same below) of the calcined material was added with decationized water (pH=3.1, the same below) and stirred to prepare. A slurry with a solid content of 25% by weight was added, 500 g of hydrochloric acid, 100 g of oxalic acid, 3.11 g of diammonium hydrogen phosphate, and 3.00 g of ferric chloride were added with a concentration of 1 mol / L, and the temperature was raised to 70 ° C, stirred at 70 ° C for 1 hour, and then filtered to remove Mother liquor, the filter cake is dried to obtain the first step product; the first step product 120g is roasted at 750 DEG C for 2 hours to obtain roasting material (called the second roasting material), 100g (dry basis, the same below) the second roasting material Add decationized water and stir to obtain a slurry with a solid content of 25 wt %, add 200 g of hydrochloric acid, 50 g of ...

preparation Embodiment 2

[0078] The kaolin A was calcined at 650 ° C for 0.5 hours to obtain a calcined material (referred to as the first calcined material), and 168 g of the first calcined material was added with decationized water, stirred to obtain a slurry with a solid content of 25% by weight, and added with a concentration of 1mol / L. 500g of hydrochloric acid, 100g of oxalic acid, 3.11g of diammonium hydrogen phosphate, 3.00g of ferric chloride, and 3.54g of boric acid were heated to 70°C, stirred for 1 hour, then filtered to remove the mother liquor, and the filter cake was dried to obtain the first step product; The first step product 120g was roasted at 650 ° C for 0.5 hours to obtain roasted material (called the second roasted material), and the second roasted material of 100 g was added with acid water (decationized water) and stirred to obtain a slurry with a solid content of 25% by weight. 200 g of hydrochloric acid and 50 g of oxalic acid, 50 g of polyethylene glycol, 1.45 g of diammoniu...

preparation Embodiment 3

[0080] The loin A was roasted at 750 ° C for 2 hours to obtain a roasted material (referred to as 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, adding a 5mol / L concentration of slurries. 500g of hydrochloric acid, 3.11g of diammonium hydrogen phosphate, 3.00g of ferric chloride, and 3.54g of boric acid were heated to 70°C, stirred for 1 hour, then filtered to remove the mother liquor, and the filter cake was dried to obtain the first step product; 120g of product was roasted at 750°C for 2 hours to obtain roasting material (called the second roasting material), the second roasting material of 100g was added with deionized water and stirred to obtain a slurry with a solid content of 25% by weight, adding 200g of hydrochloric acid of concentration 5mol / L , polyethylene glycol 50g, diammonium hydrogen phosphate 1.45g, ferric chloride 2.00g, boric acid 3.54g, be w...

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Abstract

A kind of macroporous kaolinite and its preparation and application, the macroporous kaolinite contains phosphorus and iron group metals, the average pore diameter is 2-50nm, and the pore volume of pores with a pore diameter of 10-50nm accounts for the total pore volume More than 80% of. The preparation method of the macroporous kaolinite comprises: first roasting the kaolin; forming a mixture of the first roasted kaolin, the first acid, water, an optional phosphorus compound, and an optional iron group metal compound, and performing the second roasting. First treatment, then second calcination, then mixed with second acidic solution, pore expander, optional phosphorus compound, optional iron group metal compound to form a mixture, second contact, filtration and drying to obtain macroporous kaolinite , the phosphorus compound and the iron group metal compound are introduced into at least one step of the first treatment and the second treatment. The macroporous kaolinite can be used to prepare a cracking catalyst, and the obtained catalyst has high cracking activity and high yields of ethylene and propylene.

Description

technical field [0001] The present invention relates to a kaolinite with macroporous structure and its preparation method and application method. Background technique [0002] With the gradual depletion of petroleum resources, the use of inferior residual oil is a difficult problem faced by the refining industry. How to improve the refining effect of inferior residual oil is the top priority. Catalytic cracking (FCC) has always been the most important secondary processing method of crude oil in my country's oil refining enterprises due to its strong adaptability to raw materials, high yield of light oil products, and high gasoline octane number. The production tasks of gasoline, 35% diesel and propylene, ethylene and other chemicals. The core of catalytic cracking is the catalytic cracking catalyst. The deterioration of the catalytic cracking raw material leads to the decline of the performance of the cracking catalyst, affects the product distribution of the catalytic crack...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/185B01J35/10B01J29/80B01J32/00C10G11/05C07C4/06C07C11/04C07C11/06
CPCB01J23/002B01J27/1853B01J29/80B01J35/1019B01J35/1038B01J35/1061B01J2229/18C07C4/06C07C2529/80C10G11/05C07C11/04C07C11/06Y02P20/52
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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