Synthesis method of NaY molecular sieve

A synthesis method and molecular sieve technology, which are applied in directions such as fajhedral crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite, etc., can solve the problems of low utilization rate of silicon source, increased production cost and the like, and achieve the effect of shortening crystallization time

Active Publication Date: 2013-12-18
PETROCHINA CO LTD +1
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Problems solved by technology

The disadvantage of this method is that the utilization rate of si...

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  • Synthesis method of NaY molecular sieve

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Embodiment 1

[0027] Get 81.50 grams of water glass (Beijing Red Star Soda Soda Factory product, SiO 2 Content is 28.08% by weight, modulus 3.28), add 80.16 grams of high alkali sodium metaaluminate (product of Shandong Aluminum Industry Company, Al 2 o 3 The content is 3.16% by weight, Na 2 O content is 21.11% by weight), then add 14 grams of deionized water, mix evenly, and age at 50°C for 5 hours to make a directing agent. Get 235 grams of water glass, add 83.58 grams of high alkali sodium metaaluminate, 56.63 grams of the above-mentioned guiding agent, and 183.24 grams of aluminum sulfate solution (products of China Great Wall Aluminum Corporation, Al 2 o 3 Content is 7.1 weight %), and 70 grams of water, mix uniformly, make mixture gel.

[0028] The mixture gel was put into a polytetrafluoroethylene bottle, and after crystallization at 100°C for 16 hours, 20 grams of hydrogen peroxide (Beijing Chemical Plant, H 2 o 2 content of 30% by weight) to obtain a uniform gel, put it into ...

Embodiment 2

[0034] Each raw material source is with embodiment 1. Take 81.50 grams of water glass, add 80.16 grams of peralkaline sodium metaaluminate, and then add 14 grams of deionized water, mix well, and then age at 50°C for 5 hours to make a directing agent. Take 270 grams of water glass, add 83.58 grams of peralkali sodium metaaluminate, 56.63 grams of the above-mentioned directing agent, 183.24 grams of aluminum sulfate solution, and 70 grams of water successively under stirring, and mix well to obtain a gel.

[0035] The obtained gel was packed into a polytetrafluoroethylene bottle, and after crystallization at 100°C for 26 hours, 50 grams of hydrogen peroxide (Beijing Chemical Plant, H 2 o 2 Content is 30% by weight), stirred and mixed in a polytetrafluoroethylene bottle and continued to crystallize at 100°C for 26 hours, then filtered, washed, and dried to obtain 31.95 grams of NaY molecular sieve products. The measured crystallinity was 99%, silicon The aluminum ratio is 6.12...

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Abstract

The invention relates to a synthesis method of an NaY molecular sieve. The method includes: mixing water glass, sodium metaaluminate and deionized water, conducting aging at 15-70DEG C for 0.5-48h to obtain a crystallization guiding agent; mixing the crystallization guiding agent, water glass, an acidic aluminum salt and a sodium aluminate solution uniformly to obtain a silica-alumina gel; crystallizing the silicon-aluminum gel at 80-140DEG C for 0.1- 80h; adding a peroxide into the crystallized silicon-aluminum gel, making molar ratio of the 02<2-> in the peroxide to the Al2O3 in the gel at 0.05-20, then further conducting crystallization for 5-20h, thus obtaining the NaY molecular sieve. Without adding any organic or inorganic template and being free of multiple after-treatment modification processes, the method can directly prepare the Y type molecular sieve with a high silicon-aluminum ratio. The obtained molecular sieve has crystallinity up to over 80%, a silicon-aluminum ratio of not less than 5.8, and an average grain size of 200-300.

Description

technical field [0001] The invention relates to a method for synthesizing NaY molecular sieves, in particular to a method for synthesizing NaY zeolite with higher silicon-aluminum ratio. Background technique [0002] In recent years, raw oil has become heavier and heavier, and it has become difficult to meet the development requirements using conventional cracking catalysts. How to make full and effective use of limited petroleum resources has become the focus of petroleum processing. my country's catalytic cracking catalysts are mainly rare earth Y-type catalysts, and Y-type molecular sieves are the main active components of cracking catalysts. The cracking activity and selectivity of molecular sieves directly affect the product distribution of cracking reactions. , pore structure and acid distribution, etc. have been paid close attention to the research on the influence of catalytic performance. [0003] The Grace company in the United States earlier proposed the method o...

Claims

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Application Information

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IPC IPC(8): C01B39/24
Inventor 申宝剑申伟高雄厚秦松陈元应李强张君屹王宝杰赵红娟张莉李景主明烨沈文刘宏海
Owner PETROCHINA CO LTD
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