Rapid synthesis method for high-purity zeolite molecular sieve

A zeolite molecular sieve, high-purity technology, applied in molecular sieves and alkali exchange compounds, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as poor repeatability, and achieve the effect of high crystallinity and simple and easy method.

Active Publication Date: 2017-09-15
安徽纳蓝环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the repeatability is poor, and the mixed phase of MWW type and CHA type zeolite molecular sieve often occurs

Method used

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  • Rapid synthesis method for high-purity zeolite molecular sieve
  • Rapid synthesis method for high-purity zeolite molecular sieve

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of method for rapidly synthesizing high-purity zeolite molecular sieve that the present invention proposes, comprises the following steps:

[0027] S1. Mix N,N,N-trimethyl-1-adamantyl ammonium hydroxide with deionized water, stir, then add aluminum source, then add tetraethyl orthosilicate to obtain initial gel mixture, and then The initial gel mixture is thermostated and cooled;

[0028] S2. The product obtained in S1 is washed, dried, and then calcined to obtain a high-purity zeolite molecular sieve.

Embodiment 2

[0030] A kind of method for rapidly synthesizing high-purity zeolite molecular sieve that the present invention proposes, comprises the following steps:

[0031] S1. Mix 11.5 parts by weight of N,N,N-trimethyl-1-adamantyl ammonium hydroxide with 2 parts of deionized water, stir magnetically for 4 minutes, then add 0.1 part of aluminum source, continue stirring for 25 minutes, and then Add 4 parts of tetraethyl orthosilicate, continue to stir for 4 minutes to obtain the initial gel mixture, and then carry out constant temperature treatment at 150°C for 7 days;

[0032] S2. The product obtained in S1 was washed with deionized water, dried at 85° C., and then calcined at 540° C. for 8.5 hours to obtain a zeolite molecular sieve.

Embodiment 3

[0034] A kind of method for rapidly synthesizing high-purity zeolite molecular sieve that the present invention proposes, comprises the following steps:

[0035] S1. Mix 13.5 parts by weight of N,N,N-trimethyl-1-adamantyl ammonium hydroxide with 3 parts of deionized water, stir magnetically for 7 minutes, then add 0.5 parts of aluminum source, continue stirring for 35 minutes, and then Add 4 parts of tetraethyl orthosilicate, continue to stir for 7 minutes to obtain the initial gel mixture, and then carry out constant temperature treatment at 170°C for 5 days;

[0036] S2. The product obtained in S1 was washed with deionized water, dried at 95° C., and then calcined at 570° C. for 7.5 hours to obtain a zeolite molecular sieve.

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Abstract

The invention discloses a rapid synthesis method for a high-purity zeolite molecular sieve. The rapid synthesis method comprises the following steps: S1, mixing N,N,N-trimethyl-1-adamantyl ammonium hydroxide with deionized water, stirring, then adding an aluminum source, then adding tetraethoxysilane to obtain an initial gel mixture, then carrying out constant temperature treatment on the initial gel mixture, and cooling; and S2, washing a product obtained in the S1, drying, and then carrying out calcination treatment to obtain the high-purity zeolite molecular sieve. According to the rapid synthesis method for the high-purity zeolite molecular sieve provided by the invention, the method is simple and practicable and easy to operate, and the purity of the obtained zeolite molecular sieve is high.

Description

technical field [0001] The invention relates to the technical field of zeolite molecular sieves, in particular to a method for rapidly synthesizing high-purity zeolite molecular sieves. Background technique [0002] Because the organic templates used are similar, in the existing process of synthesizing MWW-type and CHA-type zeolite molecular sieves, the product is generally a mixture of the two zeolites. In order to obtain high-purity MWW or CHA zeolite molecular sieves, various parameters of synthesis must be strictly controlled to avoid very low repeatability. In this synthesis method, high-purity MWW-type or CHA-type zeolite can be obtained by using the aluminum raw material used in conditional synthesis without changing other synthesis conditions. Synthetic zeolite molecular sieves play an important role in petrochemical and motor vehicle exhaust gas treatment. In the prior art, the repeatability is poor, and a mixed phase of MWW type and CHA type zeolite molecular sie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/48
CPCC01B39/48C01P2002/72C01P2006/80
Inventor 李超范炜田炜
Owner 安徽纳蓝环保科技有限公司
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