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Method for preparing ZSM-35 molecular sieve

A technology of ZSM-35 and molecular sieve, which is applied in iron conglomerate crystalline aluminum silicate zeolite, crystalline aluminosilicate zeolite, etc., can solve the problems of environmental pollution and high synthesis cost of molecular sieve, achieve good technical effect and reduce synthesis cost , the effect of reducing emissions

Active Publication Date: 2014-10-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] The technical problem to be solved by the present invention is that in the prior art of synthesizing ZSM-35 molecular sieve, there is a large amount of templates containing amines, which leads to high synthesis cost of molecular sieve and the problem of environmental pollution in the production process. A new preparation method is provided. ZSM-35 molecular sieve method

Method used

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  • Method for preparing ZSM-35 molecular sieve
  • Method for preparing ZSM-35 molecular sieve

Examples

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Effect test

Embodiment 1

[0039] [Example 1] Synthetic directing agent

[0040] Press 1Al 2 o 3 :29.8SiO2 2 :4.33M 2 O:12.07R:1523H 2 O ratio, dissolve 1.03 grams of sodium aluminate in 76.08 grams of water, add 0.99 grams of potassium hydroxide to dissolve, add 3.00 grams of template agent ethylenediamine, stir well, add 18.51 grams of 40% silica sol, stir for 1 hour, put In an oven at 40°C, let stand for three days.

[0041]

Embodiment 2

[0042] [Example 2] synthetic directing agent

[0043] Press 1Al 2 o 3 :30.02SiO2 2 :3.03M 2 O:20.08R:2015H 2 O ratio, dissolve 1.52 grams of aluminum sulfate in 112.50 grams of water, add 1.00 grams of sodium hydroxide to dissolve, add 8.21 grams of template agent cyclohexylamine, stir evenly, add 18.60 grams of 40% silica sol, stir for 1 hour, put in 60 ℃ oven for three days.

[0044]

Embodiment 3

[0045] [embodiment 3] synthetic directing agent

[0046] Press 1Al 2 o 3 :60.03SiO2 2 :6.01M 2 O:18.33R:999.4H 2 O ratio, dissolve 1.37 grams of sodium aluminate in 69.20 grams of water, add 2.67 grams of sodium hydroxide to dissolve, add 10.00 grams of template agent pyridine, stir evenly, add 45.60 grams of water glass, stir for 1 hour, and put it in an oven at 80°C , let stand for two days.

[0047]

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Abstract

The invention relates to a method for preparing a ZSM-35 molecular sieve, and mainly solves the problems of high synthesis cost and environmental pollution in the production process due to the heavy use of an amine-containing template in the preparation of the ZSM-35 molecular sieve in the prior art. The method comprises the following steps: 1, preparing a directing agent with the ratio of 1Al2O3:(5-35)SiO2:(0.01-10)M2O:(1-50)R:(50-3000) H2O; and 2, adding the directing agent into silica-alumina gel, and crystallizing to obtain the ZSM-35 molecular sieve. The method well solves the problems, and can be used in the industrial production for preparing the ZSM-35 molecular sieve.

Description

technical field [0001] The invention relates to a method for preparing ZSM-35 molecular sieve. Background technique [0002] ZSM-35 molecular sieve is a medium-pore molecular sieve (US4016245) developed by Mobil Corporation of the United States in the 1970s. It is mainly used in reactions such as butene skeletal isomerization and alkane skeletal isomerization. Natural ZSM-35 molecular sieve generally has a relatively low silicon-aluminum ratio, and artificial synthesis can obtain ZSM-35 molecular sieve with a high silicon-aluminum ratio. [0003] US3992466 discloses that ZSM-35 molecular sieves with small particles are prepared and used for hydrocarbon conversion reactions, using pyrrolidine as a template, Q brand water glass, aluminum sulfate, and a small amount of Darax 27, crystallized for 72 hours at 250RPM speed and 220°F . But the grains are smaller. [0004] US4016245 discloses a method for synthesizing ZSM-35 molecular sieve with ethylenediamine or pyrrolidine tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/44
Inventor 金照生李亚男许茗喆
Owner CHINA PETROLEUM & CHEM CORP
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