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Synthetic method for NaY zeolite with high silica-alumina ratio

A synthesis method and high silicon-aluminum ratio technology, applied in the direction of crystalline aluminosilicate zeolite, octahedral crystalline aluminosilicate zeolite, etc., can solve the problems of unfavorable industrial production and complicated process, and achieve good industrialization prospects and simple process , low emission effect

Active Publication Date: 2014-10-29
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in the preparation method of above-mentioned NaY molecular sieve, owing to need to add acidic substance or silicon source or prepare different alkalinity gels, make technological process comparatively numerous and diverse, be unfavorable for industrialized production

Method used

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  • Synthetic method for NaY zeolite with high silica-alumina ratio
  • Synthetic method for NaY zeolite with high silica-alumina ratio
  • Synthetic method for NaY zeolite with high silica-alumina ratio

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Experimental program
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Effect test

Embodiment 1

[0050] The present embodiment provides a kind of synthetic method of high silicon aluminum ratio NaY zeolite, it comprises the following steps:

[0051] Get 36g water glass (density 1268g / L, SiO 2 The content is 240g / L, Na 2 O content is 87.5g / L), add 25.9g high alkali sodium metaaluminate solution (density 1349g / L, Na 2 O content is 287.5g / L, Al 2 o 3 content is 41.5g / L) and aged at 33°C for 16 hours after mixing evenly to make the guiding agent;

[0052] Get 260g water glass (density 1268g / L, SiO 2 The content is 240g / L, Na 2 O content is 87.5g / L), put it into a beaker placed in a water bath at 60°C, and add 50g of the above-mentioned directing agent and 25g of high-alkali sodium metaaluminate solution (density 1349g / L, Na 2 O content is 287.5g / L, Al 2 o 3 content is 41.5g / L), after stirring for 1 hour, add 129.83g of aluminum sulfate (density 1276g / L, Al 2 o 3 content of 90.2g / L), after stirring evenly, a gel reaction mixture was prepared;

[0053] The above-ment...

Embodiment 2

[0056] The present embodiment provides a kind of synthetic method of high silicon aluminum ratio NaY zeolite, it comprises the following steps:

[0057] The preparation method of directing agent and each raw material and consumption are all the same as embodiment 1;

[0058] In the preparation process of the gel reaction mixture, the amount of each raw material and the order of addition are unchanged, but only in the directing agent, high alkali sodium metaaluminate solution (density 1349g / L, Na 2 O content is 287.5g / L, Al 2 o 3 content of 41.5g / L) into water glass in turn, stirred for 8 hours, then added aluminum sulfate, stirred evenly, and obtained a gel reaction mixture;

[0059] The above-mentioned gel reaction mixture was put into a reaction kettle for crystallization at 96° C. for 12 hours, then filtered, washed and dried to prepare NaY zeolite with high silicon-aluminum ratio.

[0060] The obtained high silicon-aluminum ratio NaY zeolite is characterized by XRD tech...

Embodiment 3

[0062] The present embodiment provides a kind of synthetic method of high silicon aluminum ratio NaY zeolite, it comprises the following steps:

[0063] The preparation method of directing agent and each raw material consumption are all the same as embodiment 1;

[0064] In the preparation process of the gel reaction mixture, the amount of each raw material and the order of addition are unchanged, but only in the directing agent, high alkali sodium metaaluminate solution (density 1349g / L, Na 2 O content is 287.5g / L, Al 2 o 3 content of 41.5g / L) into the water glass in turn, stirred for 48 hours, then added aluminum sulfate, stirred evenly, and obtained a gel reaction mixture;

[0065] The above-mentioned gel reaction mixture was put into a reaction kettle for crystallization at 96° C. for 11 h, then filtered, washed and dried to prepare NaY zeolite with high silicon-aluminum ratio.

[0066] The obtained high silicon-aluminum ratio NaY zeolite is characterized by XRD technol...

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Abstract

The invention provides a synthetic method for NaY zeolite with a high silica-alumina ratio. The method comprises the main steps: according to the proportioning requirement of a directing agent to uniformly mix a silicon source, an aluminium source and water, and ageing at 15 DEG C-60 DEG C for 0.5-120 h, so as to prepare the directing agent; according to the proportioning requirement of a gel reaction mixture to adding the directing agent and an alkaline solution into a silicone source at 10 DEG C-90 DEG C, stirring for 1 h-80 h, and stirring uniformly to obtain the gel reaction mixture; performing crystallization on the gel reaction mixture at 80-120 DEG C for 10-50 h, and then filtering, washing and drying to prepare NaY zeolite. The method does not employ a template, the preparation of the directing agent is mild in temperature, NaY zeolite with high crystallization degree and the high silica-alumina ratio is synthesized at a relatively short crystallization time. Also the method is capable of replacing conventional production technology without changing current apparatuses for industrial production, and has great important meaning on improving performances of catalytic cracking catalysts.

Description

technical field [0001] The invention relates to a method for synthesizing NaY zeolite with a high silicon-aluminum ratio, belonging to the field of inorganic materials and catalysts. Background technique [0002] Y zeolite is widely used in the petroleum refining industry due to its developed three-dimensional channels, adjustable acidity, good thermal and hydrothermal stability. Crystallinity and silicon-aluminum ratio (SiO 2 / Al 2 o 3 ) is one of the most important factors affecting the properties and functions of Y-type zeolite. When applied to catalytic cracking, a higher degree of crystallization retention means more active centers and higher catalytic performance; an appropriate increase in the ratio of silicon to aluminum in the skeleton is conducive to the decrease of the acid center density, the acid strength is improved, and the energy can be reduced. Bimolecular subtransfer reaction in catalytic cracking, so it has the advantages of good coke selectivity and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24
Inventor 申宝剑高雄厚陈元应王宝杰高志新赵红娟杨庶秦松张君屹张吉华罗杰盛刘宏海王国峰刘从华申伟吴桐主明烨沈文白云周晓晓周淑歌郭成玉袁德林
Owner PETROCHINA CO LTD
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