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Montmorillonite/Ymolecular sieve composite material and preparation method thereof

A composite material and molecular sieve technology, which is applied in the field of montmorillonite/Y molecular sieve composite material and its preparation, can solve the problems of affecting catalytic performance, prone to sintering, etc., and achieves good hydrothermal stability, low cost, high thermal stability and high thermal stability. The effect of hydrothermal stability

Inactive Publication Date: 2008-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, small-grain molecular sieves are prone to sintering during the separation process and the catalytic reaction process, agglomerating into larger particles, and affecting their catalytic performance.

Method used

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  • Montmorillonite/Ymolecular sieve composite material and preparation method thereof
  • Montmorillonite/Ymolecular sieve composite material and preparation method thereof
  • Montmorillonite/Ymolecular sieve composite material and preparation method thereof

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preparation example Construction

[0023] (2) The preparation of Y molecular sieve gel can specifically take the following methods:

[0024] Silicon source, aluminum source, sodium hydroxide and water according to (2 ~ 10) SiO 2 :Al 2 o 3 : (1~3)Na 2 O:(100~600)H 2 The molar ratio of O is mixed at room temperature and under mechanical stirring conditions, and the stirring is continued until the raw materials are evenly mixed to obtain a molecular sieve gel; the silicon source is white carbon black or silica sol; the aluminum source is sodium metaaluminate or hydroxide Aluminum, preferably sodium metaaluminate.

[0025] (3) Add the directing agent to the molecular sieve gel prepared in step (2), the amount of the directing agent accounts for 2 to 10v% of the volume of the molecular sieve gel, stir to obtain a reaction gel, then add montmorillonite microspheres , the weight ratio of montmorillonite microspheres and reaction gel is (30~70): (70~30), preferably (50~60): (50~40), stirring at room temperature fo...

Embodiment 1

[0036] (1) Preparation of the guiding agent: 1) Weigh 4.07g of sodium hydroxide and 2.09g of sodium aluminate, dissolve them in 19.95g of distilled water, and mix them evenly with electromagnetic stirring. 2) Mix the above solution with 22.72 g of sodium silicate solution. 3) After the above solution was magnetically stirred for 0.5 hours, it was put into an Erlenmeyer flask, sealed and aged at 35° C. for 96 hours to make a directing agent.

[0037] (2) Synthesis of Y molecular sieve and its growth on montmorillonite microspheres. 1) Take 130.97g of distilled water, dissolve 0.14g of sodium hydroxide and 13.09g of sodium aluminate, and stir until completely dissolved. 2) Mix the above solution with 142.43g of sodium silicate and stir vigorously until the gel is uniformly formed to obtain silica-alumina gel. 3) Add 40ml of directing agent to the silica-alumina gel, then add 30g of montmorillonite microspheres, and stir at room temperature for 0.5 hours. Hydrothermal crystall...

Embodiment 2

[0040] (1) Preparation of the guiding agent: 1) Weigh 4.07g of sodium hydroxide and 2.09g of sodium aluminate, dissolve them in 19.95g of distilled water, and mix them evenly with electromagnetic stirring. 2) Mix the above solution with 22.72 g of sodium silicate solution. 3) After the above solution was magnetically stirred for 0.5 hours, it was put into an Erlenmeyer flask, sealed and aged at 35° C. for 72 hours to make a directing agent.

[0041] (2) Synthesis of Y molecular sieve and its growth on montmorillonite microspheres. 1) Take 130.97g of distilled water, dissolve 0.14g of sodium hydroxide and 13.09g of sodium aluminate, and stir until completely dissolved. 2) Mix the above solution with 142.43g of sodium silicate and stir vigorously until the gel is uniformly formed to obtain silica-alumina gel. 3) Add 40ml of directing agent to the above-mentioned silica-alumina gel, then add 60g of montmorillonite microspheres, stir at room temperature for 0.5 hours, and conduc...

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Abstract

The invention relates to montmorillonite or Y molecular sieve composite material and a preparation method thereof. The montmorillonite or Y molecular sieve composite material is obtained through uniformly mixing the montmorillonite particles and the Y molecular sieve gel, and then crystallizing, filtering, washing and drying the mixture. The composite material prepared by the method of the invention has the structural feature of the montmorillonite as well as the Y molecular sieve, and the montmorillonite and the Y molecular sieve are mutualized. The composed montmorillonite or Y molecular sieve composite material is provided with the feature of a small crystal molecular sieve through controlling the synthetic process and condition. The preparation method has simple process and easy separation, and the prepared molecular sieve composite material has good hydrothermal stability. The composite material is mainly used for the preparation of all types of catalysts and adsorbents, and particularly hydrogenation catalyst.

Description

technical field [0001] The invention relates to a novel catalytic material and a preparation method thereof, in particular to a montmorillonite / Y molecular sieve composite material and a preparation method thereof. Background technique [0002] Y molecular sieve is widely used in catalytic cracking, hydrocracking and other processes of petrochemical industry because of its high activity, good selectivity and good stability. The small-grain Y molecular sieve can greatly increase the diffusion velocity in the crystal grain to improve its catalytic performance. The petroleum catalytic cracking catalyst prepared with the ultra-fine-grain Y molecular sieve has a higher efficiency for heavy oil cracking than the catalyst prepared with the conventional Y molecular sieve. Gasoline selectivity, and is conducive to the improvement of gasoline octane number. Therefore, the research on the preparation of small-grain Y molecular sieves is very active. CN1079444A synthesized Y molecular...

Claims

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Application Information

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IPC IPC(8): B01J29/08B01J21/16C01B39/46C01B39/04
Inventor 张喜文李瑞丰张志智凌凤香马静红孙万付方向晨
Owner CHINA PETROLEUM & CHEM CORP
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