A kind of porous composite material containing naa zeolite molecular sieve and preparation method thereof

A technology of porous composite material and zeolite molecular sieve, applied in A-type crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite, etc., can solve the problems of strict process conditions, complex process flow and high cost of raw materials

Inactive Publication Date: 2016-02-24
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 has high cost of raw materials, strict requirements on process conditions, and complex process flow

Method used

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  • A kind of porous composite material containing naa zeolite molecular sieve and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Add 186g of FCC waste catalyst fine powder, 1700g of kaolin, 100g of turnip powder, 156ml of water glass, 20g of sodium hydroxide, add water, and stir evenly to make a slurry with a solid content of 50% by weight, which is then spray-molded to make a particle size concentrated at 0-150 μm microspheres, put the microspheres into a muffle furnace, and roast them at 1000°C for 0.5 hours to obtain roasted materials;

[0028] (2) Add water to the roasted material obtained in step (1), adjust the final pH value of the slurry to 5.0 with 5 wt% citric acid, raise the temperature to 90°C, and react for 30 minutes. After the reaction is completed, filter to remove the mother liquor, wash and filter to obtain modified materials;

[0029] (3) Put 151ml of sodium hydroxide, 341ml of water, and 100g of modified materials into a stainless steel crystallization reaction kettle in turn under stirring, raise the temperature to 110°C, and crystallize at a constant temperature for 2 ho...

Embodiment 2

[0031] (1) Add 2285g spent catalyst, 442g kaolin, 50g sodium carboxymethyl cellulose, 70ml water glass, add water, grind in a ball mill for 2 hours, extrude strips on the extruder, put the strip particles into the muffle furnace, Roasting at 700°C for 5 hours to obtain a strip-shaped roasted material;

[0032] (2) Add water to the roasted material obtained in step (1) and stir evenly to make a slurry. Use 10 wt% tartaric acid to adjust the final pH value of the slurry to 3.0, raise the temperature to 30°C, and react for 90 minutes. After the reaction, filter to remove the mother liquor and wash Filtered modified materials;

[0033] (3) Put 712ml of sodium hydroxide, 1516ml of water, and 500g of modified materials into a stainless steel crystallization reaction kettle in turn under stirring, raise the temperature to 70°C, and crystallize at a constant temperature for 8 hours. After the crystallization is completed, the mother liquor is removed by filtration, the filter cake is...

Embodiment 3

[0035](1) Add 469g of spent catalyst, 529g of kaolin, 25g of silica sol, 88ml of water glass, 50g of sodium carbonate, add water, grind in a ball mill for 2 hours, press on a tablet machine, put the sheet material into a muffle furnace, and Calcined at 850°C for 2.5 hours to obtain a calcined material;

[0036] (2) Add water to the roasted material obtained in step (1), adjust the final pH value of the slurry to 4.0 with 8 wt% hydrochloric acid, raise the temperature to 60°C, and react for 30 minutes. After the reaction is completed, filter to remove the mother liquor, wash and filter to obtain the modified material ;

[0037] (3) Put 475ml of sodium hydroxide, 705ml of water, and 200g of modified materials into a stainless steel crystallization reaction kettle in turn under stirring, raise the temperature to 90°C, and crystallize at a constant temperature for 4 hours. After the crystallization is completed, the mother liquor is removed by filtration, the filter cake is washe...

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Abstract

The invention relates to a porous composite material containing a NaA zeolite molecular sieve and a preparation method thereof. The method is characterized by comprising the following steps: adding water and one or more of dispersing agent, pore-enlarging agent, assistant and adhesive into a spent catalyst and kaolin, stirring uniformly to obtain a slurry, forming by strip extrusion, balling, pelleting or spray drying, and roasting the formed material at 700-1000 DEG C for 0.5-5 hours to obtain a roasted material; adding water to the roasted material, regulating the end pH value to 3.0-5.0 with acid, reacting at 30-90 DEG C for 10-60 minutes, filtering out the mother solution, washing with water, and filtering to obtain a modifying material; and adding alkali liquor and / or sodium silicate and water into the modifying material, adding into a crystallization reaction kettle, carrying out hydrothermal crystallization at 70-110 DEG C for 2-12 hours, filtering out the mother solution, washing the filter material with deionized water, filtering, and drying the filter material to obtain the target product. The method is low in preparation cost, and can implement high-efficiency recovery and reutilization of solid waste. The product has the advantages of high zeolite molecular sieve content and high adsorption capacity.

Description

technical field [0001] The invention relates to a porous composite material containing NaA zeolite molecular sieve and a preparation method thereof, which is characterized in that the NaA zeolite molecular sieve composite material with a porous structure is prepared by using waste catalyst and kaolin as raw materials through a hydrothermal synthesis method. It belongs to the field of inorganic material synthesis. Background technique [0002] Zeolite molecular sieve is a kind of artificially synthesized aluminosilicate with microporous cubic lattice. Molecules that adsorb or repel different substances according to the size of the pores inside their crystals have good thermal and hydrothermal stability while having good shape-selective properties, and are widely used in catalytic and adsorption separation processes. Generally, the directly synthesized zeolite molecular sieve is a loose crystal powder, which is easy to be deactivated and aggregated into agglomerates during th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/14
CPCC01B39/18
Inventor 郑淑琴唐课文易健民任劭余红霞张建策朱葳王丽丹宋馨田明珠
Owner HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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