Preparation method of NaY zeolite

A zeolite and kaolin technology, which is applied in the field of kaolin spray microspheres as raw materials, can solve the problems of not mentioning white powder, increasing the content of ex-situ crystallization white powder, increasing post-processing costs, etc. The effect of the pore structure

Active Publication Date: 2012-03-14
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the patent does not mention the amount of white powder produced in the crystallization product. Generally speaking, the method of adding aluminum source will greatly increase the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]With 3000g of kaolin, based on the mass of kaolin, add 10% of water glass, 6% of pseudoboehmite, 1% of auxiliary agent polydimethyldiallylammonium chloride, and add deionized water to prepare a solid content of 33%. The mixed slurry obtains the kaolin spray microspheres of 3028g. A part of the microspheres was calcined at 700° C. for 1.5 hours to obtain partial earth microspheres PT-1.

[0036] Mix 100g of PT-1 partial earth microspheres with 1321ml of water glass, 470ml of 14wt% sodium hydroxide solution, and 138ml of directing agent. After stirring for 30 minutes, the mixed solution is put into a stainless steel reaction kettle and heated to 106°C for 12 hours of static crystallization. After the crystallization is completed, the white powder in the solution is removed by settling and washing, and then the filter cake is filtered, washed, and dried to obtain an in-situ crystallization product. As determined by X-ray diffraction, it contains 51% NaY zeolite, and the si...

Embodiment 2

[0038] With 3000g of kaolin, based on the mass of kaolin, add 6% of water glass, 4% of pseudoboehmite, 2% of auxiliary agent polydimethyldiallyl ammonium chloride, and add deionized water to prepare a solid content of 37%. The mixed slurry obtains the kaolin spray microspheres of 3110g. A part of the microspheres was calcined at 970° C. for 1.5 hours to obtain high soil microspheres GT-2, and the other part was calcined at 800° C. for 2 hours to obtain partial earth microspheres PT-2.

[0039] Take 60g of high soil microsphere GT-2 and 40g of partial soil microsphere PT-2, mix it with 950ml of water glass, 316ml of 14wt% sodium hydroxide solution, and 134ml of directing agent, stir for 30 minutes, and then put the mixture into a stainless steel reaction kettle In the process, the temperature was raised to 96°C for static crystallization at a constant temperature for 26 hours. After the crystallization is completed, the white powder in the solution is removed by settling and w...

Embodiment 3

[0041] Get 40g of GT-2 high-soil microspheres in Example 2, 60g of PT-2 partial-soil microspheres, mix with 860ml water glass, 364ml14wt% sodium hydroxide solution, and 120ml guiding agent, stir for 30 minutes, and put the mixed solution into stainless steel for reaction In the kettle, the temperature was raised to 100°C for 16 hours of static crystallization. After the crystallization is completed, the white powder in the solution is removed by settling and washing, and then the filter cake is filtered, washed, and dried to obtain an in-situ crystallization product. As determined by X-ray diffraction, it contains 62% NaY zeolite, and the silicon-aluminum ratio is 4.73.

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Abstract

A preparation method of NaY zeolite. The preparation process comprises the steps of: adding deionized water and an auxiliary agent of polydimethyldiallyl ammonium chloride into a raw material of kaolin; carrying out spray drying on a prepared mixing slurry to obtain kaolin spray microballoons; sintering; mixing the sintered microballoons with a guiding agent; carrying out hydrothermal crystallization; filtering, washing and drying to obtain an in situ crystallization product with a NaY zeolite content of 50-70%, wherein an addition of the polydimethyldiallyl ammonium chloride is 1-10wt% of kaolin.

Description

technical field [0001] The invention belongs to the field of oil refining catalysts, specifically a method for NaY zeolite, more specifically a method for synthesizing NaY zeolite by in-situ crystallization using kaolin spray microspheres as raw materials. Background technique [0002] According to different preparation methods, FCC catalysts are divided into semi-synthetic catalysts and in-situ crystallization catalysts. Semi-synthetic catalysts refer to catalysts prepared by preparing molecular sieves and substrates separately, and then bonded and formed by binders. The type and quantity of active components, pore volume and other properties can be flexibly adjusted. In-situ crystallization catalyst, also known as all-clay catalyst, refers to a catalyst prepared by kaolin through beating, spraying, and high-temperature roasting to obtain microspheres containing a certain active silicon-aluminum source, and then through in-situ crystallization technology. Compared with sem...

Claims

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Application Information

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IPC IPC(8): C01B39/24
Inventor 熊晓云高雄厚王宝杰张莉赵红娟赵晓争胡清勋
Owner PETROCHINA CO LTD
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