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Method for modifying kaolin

A kaolin, modified technology, applied in chemical instruments and methods, petroleum industry, cracking and other directions, can solve the problems of consumption, high energy consumption and production cycle, difficult filtration, etc., to achieve the effect of reducing costs

Active Publication Date: 2011-09-21
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these technologies require the acid-modified kaolin to be used after filtering and washing. Because the particles of kaolin are very small, it is difficult to filter and it is difficult to carry out large-scale industrial production, and it will inevitably consume higher energy consumption. and production cycle

Method used

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  • Method for modifying kaolin
  • Method for modifying kaolin
  • Method for modifying kaolin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Put 500 grams of kaolin A into a 1000 ml quartz crucible, bake it at 650° C. for 3 hours, and cool it down to obtain roasted kaolin A1.

[0069] Get 150 grams (dry basis) roasting kaolin A1, pour into 700g acidic solution (containing the HCl of 19.01wt% and the HClO of 13.16wt%) 4 ) in the enamel reaction kettle, after mixing evenly, add 100 grams (dry basis) of basic aluminum chloride and 40 grams (dry basis) of pseudo-boehmite, react at 95 ° C for 2 hours, release the pressure, cool, and prepare Obtain the mixed slurry B1 containing modified kaolin of the present invention.

[0070] B1 was filtered and washed with water, then dried, and the pore structure was analyzed. The results are shown in Table 3.

Embodiment 2

[0072] 500 grams of kaolin A are packed into a 1000 ml quartz crucible, fired at 870° C. for 1 hour, and then roasted kaolin A2 is obtained after cooling.

[0073] Get 380 grams (dry basis) of roasted kaolin A2, pour in the enamel reaction kettle that 680g acidic solution (containing 30wt% HCl) is housed, after mixing evenly, add 20 grams (dry basis) metal aluminum powder, react at 115 ℃ After 1.5 hours, the pressure was released and cooled to obtain the mixed slurry B2 containing modified kaolin of the present invention.

[0074] B2 was filtered and washed with water, then dried, and the pore structure was analyzed. The results are shown in Table 3.

Embodiment 3

[0076] Put 500 grams of kaolin A into a 1000 ml quartz crucible, bake at 730° C. for 2 hours, and cool to obtain roasted kaolin A3.

[0077] Get 100 grams (dry basis) roasted kaolin A3, pour into 800g acid solution (containing the HCl of 13.62wt% and the HNO of 1.0wt%) 3 ) in the enamel reaction kettle, after mixing evenly, add 80 grams (dry basis) of basic aluminum chloride and 40 grams (dry basis) of metal aluminum powder, react at 105 ° C for 50 minutes, release the pressure, and cool to obtain the present invention The mixed slurry B3 containing modified kaolin.

[0078] B3 was filtered and washed with water, then dried, and the pore structure was analyzed. The results are shown in Table 3.

[0079] Table 3 Characterization results of pore structure

[0080]

[0081] From the data in Table 3, it can be seen that compared with the unmodified kaolin A, the developed modified kaolin has a larger pore volume, especially a higher proportion of medium and large pores.

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PUM

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Abstract

The invention relates to a method for modifying kaolin, which comprises the following steps of: roasting kaolin used as raw material at high temperature firstly; mixing the high-temperature roasted kaolin with added aluminum source and acidic solution and stirring evenly to obtain mixed slurry; reacting under a certain condition, and directly using a reaction product as the raw material for preparing a catalytic cracking catalyst without filtering. The modified kaolin has large volume of mesopores and macropores and certain activity, the slurry containing the modified kaolin has a certain adhesive property, and a catalyst prepared from the slurry containing the modified kaolin presents a stronger heavy metal resisting capability.

Description

technical field [0001] The invention relates to a modification method of kaolin, which is especially suitable for the preparation of catalytic cracking catalyst. Background technique [0002] With the growth of the world economy, the demand for energy is increasing day by day. As one of the most important energies in the world today—petroleum will be further developed, so the oil refining industry will still maintain its dominant position in energy utilization in the 21st century. In my country, the fluid catalytic cracking unit (FCCU) has always been the most important secondary processing unit in refineries due to its strong adaptability to raw materials, high yield of light oil products, and high octane number of gasoline; Cracking undertakes the production tasks of 75% of gasoline, 35% of diesel and propylene in my country, so catalytic cracking is also called the heart of refineries in China. Therefore, catalytic cracking technology has naturally become the leading tec...

Claims

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Application Information

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IPC IPC(8): B01J21/16C10G11/02
Inventor 高雄厚王宝杰赵连鸿张海涛张忠东马建刚刘超伟赵红娟赵晓争熊晓云杨一青
Owner PETROCHINA CO LTD
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