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Method for synthesizing NaA type molecular sieve material by catalytically cracking dead catalyst

A waste catalyst and catalytic cracking technology, which is applied in the field of resource utilization of solid waste, can solve the problems of complex composition of raw and auxiliary materials, unknown solidification effect of heavy metals such as nickel, and various types of equipment, so as to achieve resource utilization and ease of reaction conditions , The material constitutes a simple effect

Active Publication Date: 2019-02-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the composition of raw and auxiliary materials in this method is relatively complicated, and many types of equipment are required, and the curing effect of heavy metals such as nickel in the product is unknown.

Method used

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  • Method for synthesizing NaA type molecular sieve material by catalytically cracking dead catalyst
  • Method for synthesizing NaA type molecular sieve material by catalytically cracking dead catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) The waste catalytic cracking catalyst is crushed, and the particle size of the crushed waste catalytic cracking catalyst is 20-50 microns. After mixing 100 g of catalytic cracking waste catalyst powder, 100 g of sodium carbonate and 35 g of sodium silicate, it is roasted at high temperature 2 Hours, calcination temperature 760 ℃, cooling to room temperature to obtain a solid solution;

[0029] (2) Place the solid solution obtained in step (1) in a closed container, and hydrothermally crystallize it at 95°C for 8 hours;

[0030] (3) Filter the product obtained by hydrothermal crystallization in step (2), add the obtained filter material to 500ml of 3.2mol / L sodium hydroxide solution, stir at room temperature for 1 hour; then add 77g of aluminum Sodium powder, after stirring for 1 hour, let it stand for 18 hours;

[0031] (4) Heat the aged mixture obtained in step (3) to 80°C and stir at constant temperature for 1.5 hours; centrifuge the product, rinse with deionized water,...

Embodiment 2

[0034] (1) The waste catalytic cracking catalyst is crushed, and the particle size of the crushed waste catalytic cracking catalyst is 20-50 microns. After mixing 100g of catalytic cracking waste catalyst powder, 100g sodium carbonate and 2g sodium silicate, it is roasted at a high temperature. Hours, calcination temperature 600 ℃, cooling to room temperature to obtain solid solution;

[0035] (2) Put the solid solution obtained in step (1) in a closed container and hydrothermally crystallize it at a temperature of 80°C for 3 hours;

[0036] (3) Filter the product obtained by hydrothermal crystallization in step (2), add the obtained filter material to 500ml of 3mol / L sodium hydroxide solution, stir at room temperature for 2 hours; then add 38.5g of aluminate Sodium powder, after stirring for 2 hours, let it stand for 24 hours;

[0037] (4) Heat the aged mixture obtained in step (3) to 60°C and stir at constant temperature for 1 hour; centrifuge the product, rinse with deionized wat...

Embodiment 3

[0039] (1) The waste catalytic cracking catalyst is crushed, and the particle size of the crushed waste catalytic cracking catalyst is 20-50 microns. After mixing 100g of catalytic cracking waste catalyst powder, 100g sodium carbonate and 17.4g sodium silicate, it is roasted at high temperature 3 hours, calcination temperature 900 ℃, cooled to room temperature to obtain a solid solution;

[0040] (2) Place the solid solution obtained in step (1) in a closed container, and hydrothermally crystallize it at a temperature of 110°C for 12 hours;

[0041] (3) Filter the product obtained by hydrothermal crystallization in step (2), add the obtained filter material to 500ml of 4mol / L sodium hydroxide solution, stir at room temperature for 2 hours; then add 54.6g of aluminate Sodium powder, after stirring for 1 hour, let it stand for 12 hours;

[0042] (4) Heat the aged mixture obtained in step (3) to 90°C and stir at constant temperature for 2 hours; centrifuge the product, rinse with deion...

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Abstract

The invention provides a method for synthesizing a NaA type molecular sieve material by catalytically cracking a dead catalyst, which comprises the steps of using a catalytic cracking dead catalyst asa raw material, adding sodium carbonate and sodium silicate, and calcining at a high temperature to obtain a solid solution; subjecting the obtained solid solution to hydrothermal crystallization ata certain temperature, filtering the product obtained by hydrothermal crystallization, adding the filter material into a sodium hydroxide solution at certain concentration, stirring for a period of time, then adding a certain amount of sodium aluminate powder, stirring thoroughly and then performing standing and aging; and stirring the aged mixture at a certain temperature, centrifuging and separating the product obtained by the reaction, washing the product with deionized water, and drying to obtain the NaA type molecular sieve material. The raw and auxiliary materials are simple in composition, the reaction conditions are mild, and the cost is low. The prepared NaA type molecular sieve material has high content, a good solidification and stabilization effect on heavy metals such as nickel, and realizes resourceful utilization while harmlessly treating the dead catalyst.

Description

Technical field [0001] The invention relates to the field of solid waste resource utilization, in particular to a method for synthesizing NaA molecular sieve materials from a catalytic cracking waste catalyst. Background technique [0002] In my country, the amount of catalytic cracking catalyst accounts for about 85% of the total amount of refining catalysts. After the catalytic cracking catalyst is repeatedly regenerated and used in this device, part of the catalyst is destroyed by the hydrothermal environment due to the molecular sieve structure or due to the adsorption of excessive heavy metals and carbon deposits. , Will be irreversibly deactivated and discharged. This part of the discarded catalytic cracking waste catalyst is included in the "National Hazardous Waste List" and belongs to hazardous waste. In our country, the annual production of waste catalytic cracking catalysts is about 100,000 tons. In order to prevent environmental pollution, it must be treated with harml...

Claims

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Application Information

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IPC IPC(8): C01B39/14
CPCC01B39/14C01P2002/72
Inventor 房师平张宏哲汪皕喆张志远
Owner CHINA PETROLEUM & CHEM CORP
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