A kind of nay molecular sieve with high silicon-aluminum ratio and small grain size and preparation method thereof

A technology with high silicon-aluminum ratio and small crystal grains, which is applied in the fields of aluminum silicate, chemical instruments and methods, silicates, etc., can solve the problems of small increase in silicon-aluminum ratio, complex process operation, and low utilization rate of silicon sources and other problems, to achieve the effect of improving mass transfer and heat transfer rate, high solid content, and improving the utilization rate of silicon source

Active Publication Date: 2020-12-08
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the shortcomings of the existing technology for preparing NaY molecular sieves with high silicon-aluminum ratio and small crystal grains, the silicon-aluminum ratio is not greatly improved, the process operation is complicated, the crystallization time is long, the single-pot yield is low, and the silicon source utilization rate is low. The object of the present invention is to provide a NaY molecular sieve with high silicon-aluminum ratio and small crystal particles and its preparation method. The preparation method does not need to use any organic amine template agent, and utilizes the silicon source precursor processed by the polymer to synthesize high-silicon-aluminum in a short time and efficiently It is better than NaY molecular sieve and solves the mass transfer and heat transfer effect in the system during the scale-up process

Method used

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  • A kind of nay molecular sieve with high silicon-aluminum ratio and small grain size and preparation method thereof
  • A kind of nay molecular sieve with high silicon-aluminum ratio and small grain size and preparation method thereof
  • A kind of nay molecular sieve with high silicon-aluminum ratio and small grain size and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0056] This implementation provides a kind of high silicon aluminum ratio small grain NaY molecular sieve and its preparation method, comprising the following steps:

[0057] Mix the microsphere silica gel with the ethanol solution of polyethylene glycol, mix in a closed container at 500°C for 6 hours under nitrogen atmosphere, age at room temperature for 2 hours, then wash with water until the pH value is 7, and finally dry to obtain the highly active crude Porous microsphere silica gel;

[0058] Take by weighing 15.13g sodium hydroxide solid (Beijing Chemical Plant, 96wt%) and be dissolved in 48.326g deionized water, after cooling to room temperature, add 3.68g sodium metaaluminate (Tianjin Jinke Fine Chemical Research Institute, Al 2 o 3 Content is 45wt%, Na 2 O content is 41wt%), makes high alkalinity sodium metaaluminate solution, after stirring, add 86.5g water glass (SiO 2 The content is 21.38wt%, Na 2 The content of O is 5.86wt%), mixed uniformly and aged under agi...

Embodiment 2

[0063] This implementation provides a kind of high silicon aluminum ratio small grain NaY molecular sieve and its preparation method, comprising the following steps:

[0064] Mix silica and polyethylene glycol ethanol solution, mix in a closed container at 500°C for 6 hours under nitrogen atmosphere, age at room temperature for 2 hours, then wash with water until the pH value is 7, and finally dry to obtain high-activity white carbon black. carbon black;

[0065] The preparation of directing agent is with embodiment 1;

[0066] Weigh 8.27g of high-activity white carbon black and place it in a beaker, add 24g of deionized water, stir and mix evenly, then weigh 4g of sodium metaaluminate, add and mix evenly, add 15.88g of the above-mentioned guiding agent, stir evenly Form a brown gel state, the total gel mass of the reaction mixture is 52.15g, and the proportioning is 2.95Na 2 O: Al 2 o 3 : 8.50SiO2 2 : 102.06H 2 O, the solid content is 31.93%;

[0067] Put it into a sta...

Embodiment 3

[0069] This implementation provides a kind of high silicon aluminum ratio small grain NaY molecular sieve and its preparation method, comprising the following steps:

[0070] Mix solid silicic acid with ethanol solution of polyethylene glycol, mix in a closed container at 200°C for 30 hours under nitrogen atmosphere, age at room temperature for 12 hours, then wash with water until the pH value is 7, and finally dry to obtain highly active silicon acid;

[0071] The preparation of directing agent is with embodiment 1;

[0072] Weigh 7.72g of highly active silicic acid and place it in a beaker, add 24g of deionized water, stir and mix evenly, then weigh 4g of sodium metaaluminate, add and mix evenly, add 14.82g of the above-mentioned guiding agent, stir evenly and form Brown gel state, the total gel mass of the reaction mixture is 50.54g, and the proportion is 2.86Na 2 O: Al 2 o 3 : 7.98SiO2 2 : 100.44H 2 O, the solid content is 31.28%;

[0073] Put it into a stainless st...

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Abstract

The invention provides a small grain NaY molecular sieve with high Si / Al ratio as well as a preparation method of the small grain NaY molecular sieve. The preparation method comprises following steps:a solid silicon source is mixed with a polymer, and the obtained mixture is subjected to high-temperature treatment under nitrogen protection to obtain a high-activity silicon source; the silicon source, an aluminum source, alkali liquor and water are mixed and aged to obtain a guidance agent; the high-activity silicon source, the guidance agent and water are mixed and stirred to obtain reactiongel; the reaction gel is crystallized, filtered, washed and dried to obtain the small grain NaY molecular sieve with high Si / Al ratio. The preparation method of the small grain NaY molecular sieve with the high Si / Al ratio can directly prepare a Y type molecular sieve with high Si / Al ratio in a short time. Compared with conventional methods, in the same feed molar ratio, the preparation method cansignificantly shorten the crystallization time, improve the Si / Al ratio of products and, the silicon source utilization and the solid content of the silicon source and aluminum source in the reactiongel is high. Furthermore, the yield of single kettle is doubled or more than the yield of the industrial sodium silicate at present.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a high-silicon-aluminum-ratio small-grain NaY molecular sieve and a preparation method thereof. Background technique [0002] Y-type molecular sieve has a faujasite crystal structure, and as the main active component of the catalyst, it is widely used in catalytic cracking, hydrocracking, alkylation and other oil refining processes. [0003] The silicon-aluminum ratio of the Y-type molecular sieve has a great influence on the performance of the FCC catalyst. Increasing the skeleton silicon-aluminum ratio of Y-type molecular sieve helps to prolong the service life of the catalyst, and also directly affects the production of the catalyst and the distribution and economic benefits of catalytic cracking products. [0004] Y-type molecular sieves with a high silicon-aluminum ratio are basically realized through the process of post-treatment. The main methods of post-treatment include...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/26
CPCC01B33/2853C01P2002/72C01P2004/03
Inventor 巩雁军赵晓萌蒙晓玲张恒魏建辉
Owner BC P INC CHINA NAT PETROLEUM CORP
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