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Pseudo boehmite preparation method

A technology of pseudo-boehmite and aluminum salt, applied in the field of preparing pseudo-boehmite, to achieve the effects of reducing processing costs, easy industrialization, and simple preparation process

Inactive Publication Date: 2017-11-17
HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can make the waste resource utilization, improve its utilization value, and solve the problem of environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Add 500 g of spent FCC catalyst to 4652 g of hydrochloric acid solution with a concentration of 6 mol / L, raise the temperature to 70 °C, and react for 3 h. After the reaction is completed, filter to obtain an acidic reaction solution;

[0022] (2) The acidic reaction solution obtained in step (1) was added with a concentration of 3872 g of 31.6% sodium hydroxide solution, and after the full reaction was completed, it was filtered and washed, and the filtrate was sodium metaaluminate solution;

[0023] (3) Mix the sodium metaaluminate solution obtained in step (2) with the aluminum sulfate solution with an alumina concentration of 90 g / L, adjust the pH of the system to 9.5, and age at 80 °C for 6 h under stirring;

[0024] (4) The reaction product obtained in step (3) was filtered and washed with water, and the filter cake was dried at 120 °C for 8 h and then pulverized to obtain pseudo-boehmite A.

Embodiment 2

[0026] (1) Add 100 g of spent FCC catalyst to 372 g of concentrated hydrochloric acid solution, raise the temperature to 90 °C, and react for 1 h. After the reaction is completed, filter to obtain an acidic reaction solution;

[0027] (2) The acidic reaction solution obtained in step (1) was added with a concentration of 2284 g of 17.1% potassium hydroxide solution, and after the full reaction was completed, it was filtered and washed, and the filtrate was potassium metaaluminate solution;

[0028] (3) Mix the potassium metaaluminate solution obtained in step (2) with the aluminum chloride solution with an alumina concentration of 25 g / L, adjust the pH of the system to 12, and age at 95 °C for 3 h under stirring;

[0029] (4) The reaction product obtained in step (3) was filtered and washed with water, and the filter cake was dried at 150 °C for 4 h and then pulverized to obtain pseudo-boehmite B.

Embodiment 3

[0031] (1) Add 1000 g of spent FCC catalyst to 8993 g of 30% nitric acid solution, heat up to 50 °C, treat for 8 hours, and filter after the reaction is completed to obtain an acidic reaction solution;

[0032] (2) The acidic reaction solution obtained in step (1) was added with a concentration of 16615 g of 17.2% ammonia solution, and after the full reaction was completed, it was filtered and washed, and the filtrate was sodium metaaluminate solution;

[0033] (3) Mix the sodium metaaluminate solution obtained in step (2) with the aluminum nitrate solution with an alumina concentration of 15 g / L, adjust the pH of the system to 10, and age at 60 °C for 12 h under stirring;

[0034] (4) The reaction product obtained in step (3) was filtered and washed with water, and the filter cake was dried at 130 °C for 6 h and then pulverized to obtain pseudo-boehmite C.

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Abstract

The present invention discloses a pseudo boehmite preparation method, and relates to a method for preparing pseudo-boehmite by using a FCC spent catalyst. The preparation method comprises: A) adding a FCC spent catalyst to an acid solution, uniformly mixing and stirring, carrying out a reaction for 1-8 h at a temperature of 50-90 DEG C, filtering, washing, and collecting the filtrate to obtain an acid reaction liquid; B) adding the acid reaction liquid obtained in the step A) to an alkali solution, carrying out a complete reaction, filtering, and washing, wherein the obtained filtrate is a metaaluminate solution; C) mixing the filtrate obtained in the step B) and an aluminum salt solution, adjusting the pH value of the system to 7.5-12, and aging for 2-12 h at a temperature of 60-100 DEG C under a stirring state to obtain a reaction product; and D) filtering the reaction product obtained in the step C), carrying out water washing, drying the filter cake, and crushing to obtain the pseudo boehmite. According to the present invention, the new technical route is provided for the preparation of the high added-value pseudo boehmite from the FCC spent catalyst, and the environmental pollution caused by the FCC spent catalyst can be solved.

Description

technical field [0001] The invention relates to a method for preparing pseudo-boehmite, specifically, a method for preparing pseudo-boehmite by using waste FCC catalyst as a raw material and undergoing acid treatment, gelling, aging and other processes to prepare pseudo-boehmite. It belongs to the field of inorganic material preparation. Background technique [0002] Pseudoboehmite, also known as false boehmite, AlOOH·nH 2 O, n=0.08~0.62, its crystal phase has high purity, good peptization performance, strong cohesiveness, high specific surface area and large pore volume. It can be used as a binder for semi-synthetic catalytic cracking catalysts, a binder for aluminum silicate refractory fibers, a catalyst for ethylene production from alcohol dehydration and a catalyst for ethylene oxide, etc. It can also be used as a catalyst carrier for the production of catalyst carriers, activated alumina and other aluminum salts Raw materials are a class of inorganic materials with b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/14B01J21/04
CPCB01J21/04C01F7/14C01P2006/12C01P2006/14C01P2006/16C01P2006/80
Inventor 郑淑琴何理均唐课文张盼良任邵张建策潘登徐书伟李洁周永
Owner HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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