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Method for preparing mesoporous Y-type molecular sieve

A molecular sieve and mesoporous technology, which is applied in the directions of crystalline aluminosilicate zeolite, octahedral crystalline aluminosilicate zeolite, etc., can solve the problems of Y-type molecular sieve report, etc., and achieve the effect of reducing synthesis cost.

Active Publication Date: 2015-09-09
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] At present, the molecular sieves synthesized by the seed crystal method include BETA molecular sieves, ZSM molecular sieves, LEV molecular sieves and FER molecular sieves, but there are few reports on Y-type molecular sieves.

Method used

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  • Method for preparing mesoporous Y-type molecular sieve
  • Method for preparing mesoporous Y-type molecular sieve
  • Method for preparing mesoporous Y-type molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] This embodiment provides the preparation of micro-mesoporous Y-type molecular sieve seed crystal 1, including the following methods:

[0059] (1), using Y-type molecular sieve structure directing agent 1;

[0060] (2) Preparation of micro-mesoporous Y-type molecular sieve crystal seeds: Weigh 45g of water glass, 13g of directing agent 1 into a 250ml flask, and add aluminum sulfate solution (15.42g with 40.00ml of deionized water) under vigorous stirring dissolved), dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride 1.5g, lye (2.00gNaOH and 1.94gNaAlO 2 Dissolved in 40.00ml of deionized water); after the dropwise addition, keep stirring at 25°C for 1h, and place the gel in a kettle at 100°C to crystallize for 24h; cool, filter with suction, and dry to obtain micro-mesoporous Y-type molecular sieve seed crystal 1 .

[0061] Carry out X-ray diffraction measurement to micro-mesoporous Y-type molecular sieve seed crystal 1, the result is as follows figure 1 As ...

Embodiment 2

[0064] This embodiment provides the preparation of micro-mesoporous Y-type molecular sieve seed crystal 2, including the following methods:

[0065] (1), using Y-type molecular sieve structure directing agent 2;

[0066] (2) Preparation of micro-mesoporous Y-type molecular sieve crystal seeds: Weigh 67g of water glass, 10g of directing agent 2 into a 250ml flask, and add aluminum sulfate solution (15.42g with 40.00ml of deionized water) under vigorous stirring obtained by dissolving), dimethyloctadecyl[3-(triethoxysilyl)propyl]ammonium bromide 2g, lye (2.5gNaOH and 1.94gNaAlO 2 Dissolved in 40.00ml of deionized water); after the dropwise addition, keep stirring at 25°C for 1h, and place the gel in a kettle at 100°C to crystallize for 24h; cool, filter with suction, and dry to obtain micro-mesoporous Y-type molecular sieve seed crystal 2 .

Embodiment 3

[0068] This embodiment provides the preparation of micro-mesoporous Y-type molecular sieve seed crystal 3, including the following methods:

[0069] (1), using Y-type molecular sieve structure directing agent 3;

[0070] (2) Preparation of micro-mesoporous Y-type molecular sieve crystal seeds: Weigh 75g of water glass, 8g of directing agent 3 into a 250ml flask, and add aluminum sulfate solution (15.42g with 40.00ml of deionized water) under vigorous stirring obtained by dissolving), dimethyloctadecyl[3-(triethoxysilyl)propyl]ammonium bromide 3g, lye (3.0gNaOH and 1.94gNaAlO 2 Dissolved in 40.00ml of deionized water); after the dropwise addition, keep stirring at 25°C for 1h, and place the gel in a kettle at 100°C to crystallize for 24h; cool, filter with suction, and dry to obtain micro-mesoporous Y-type molecular sieve seed crystal 3 .

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Abstract

The invention provides a method for preparing a mesoporous Y-type molecular sieve. In the method, a structural guiding agent of the Y-type molecular sieve is synthesized and comprises the composition of (1-32)Na2O:Al2O3:(10-40)SiO2:(200-500)H2O, a seed crystal method is adopted for replacing an organic template agent for synthesis of the molecular sieve, a gel has the composition of (1-100)Na2O:Al2O3:(1-100)SiO2:(20-800)H2O, the addition amount of a seed crystal is 1%-15% of the mass of SiO2 in a gel system, and the mesoporous Y-type molecular sieve is synthesized through hydrothermal crystallization in an alkaline condition. A catalyst prepared by the molecular sieve shows good catalytic performance on catalytic cracking of heavy oil, the organic template agent is not used, a subsequent calcination process is omitted, and while the relatively high synthetic efficiency of the molecular sieve is ensured, the synthetic cost of the mesoporous Y-type molecular sieve is substantially reduced.

Description

technical field [0001] The invention relates to a method for preparing a mesoporous Y-type molecular sieve, in particular to a method for preparing a mesoporous Y-type molecular sieve by using a seed crystal method, and belongs to the technical field of catalysts. Background technique [0002] Y-type molecular sieve once caused a revolution in oil refining technology, but its small pore size limits its effective cracking of heavy oil macromolecules. Although the advent of mesoporous molecular sieves such as MCM-1 and SBA-15 has brought hope to the processing of heavy oil, the weak stability and acidity of these molecular sieves, as well as the high synthesis cost limit their real industrial applications. The most economical and effective way to prepare molecular sieves for heavy oil processing is to introduce mesopores into traditional Y-type molecular sieves while maintaining the strong acidity of Y-type molecular sieves. [0003] Traditional hydrothermal treatment, acid-b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24
Inventor 高雄厚刘洪涛胡清勋赵晓争刘宏海曹立刘超伟徐春艳王宝杰熊晓云张莉赵红娟王久江段宏昌高永福王林田爱珍潘志爽侯凯军曹庚振
Owner PETROCHINA CO LTD