Green method for producing tetrapropylammonium hydroxide by using membrane technique

A technology of tetrapropylammonium hydroxide and tetrapropylammonium bromide, which is applied in the field of green environmental protection, can solve the problems of tetrapropylammonium hydroxide solution pollution, cations entering the alkali chamber, etc., and achieve short production cycle and high conversion efficiency , the effect of simple operation

Inactive Publication Date: 2017-09-26
刘铁群
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The characteristics of the traditional bipolar membrane electrodialysis device may cause cations in the polar water to enter the alkali chamber, resulting in pollution of the tetrapropylammonium hydroxide solution, which requires a special membrane pair layout to improve

Method used

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  • Green method for producing tetrapropylammonium hydroxide by using membrane technique
  • Green method for producing tetrapropylammonium hydroxide by using membrane technique
  • Green method for producing tetrapropylammonium hydroxide by using membrane technique

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Embodiment 1

[0021] Such as figure 1 As shown, after the 25% tetrapropylammonium bromide solution is pretreated by a security filter, etc., and then passed through a bipolar membrane electrodialysis device, about 10% of tetrapropylammonium hydroxide and about 5% of hydrobromic acid are obtained. The tetrapropylammonium hydroxide is further concentrated to more than 17% by electrodialysis, and the desalination liquid produced in the electrodialysis desalination chamber is reused as the receiving liquid in the alkali chamber of the bipolar membrane device for the next batch of liquid treatment.

[0022] Specific steps are as follows:

[0023] In the first step, the prepared 25% tetrapropylammonium bromide solution is subjected to pretreatment such as sand filtration and microfiltration to remove impurities such as suspended solids in the feed liquid.

[0024] In the second step, the feed liquid after impurity removal enters the bipolar membrane electrodialysis device for treatment, such as ...

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PUM

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Abstract

The invention discloses a green method for producing tetrapropylammonium hydroxide by using a membrane technique and belongs to the technical field of membrane separation chemical engineering. The method comprises the following steps: pretreating a tetrapropylammonium bromide solution by using a security filter and the like, further passing through a bipolar membrane electrodialysis device so as to obtain tetrapropylammonium hydroxide and hydrobromic acid, further performing electrodialysis on the obtained tetrapropylammonium hydroxide, further concentrating to be 17% or above, and recycling an electrodialysis dilution as a bipolar membrane device alkali chamber receiving liquid for a next batch of liquid treatment. A conventional method that tetrapropylammonium hydroxide is produced from tetrapropylammonium bromide through point solution is replaced, bipolar membrane electrodialysis and electrodialysis techniques are comprehensively utilized, production of high-danger bromine water is effectively avoided, and compared with a conventional process, the method has the advantages of being low in energy consumption, high in product purity and small in environment pollution.

Description

technical field [0001] The invention belongs to the technical field of membrane separation chemical industry, and in particular relates to an environment-friendly method for producing tetrapropylammonium hydroxide using membrane technology. Background technique [0002] The molecular formula of tetrapropylammonium hydroxide is C 12 h 29 NO, CBNumber: CB4359371, molecular weight: 203.36, MOLFile: 4499-86-9.mol. Tetrapropylammonium hydroxide is an organic base, widely used in the production of titanium silicon molecular sieves, and as a special alkali source and template agent, tetrapropylammonium hydroxide plays an important role in the preparation of ZSM-5 molecular sieves structural orientation. Along with the development of modern industry, the application of tetrapropyl ammonium hydroxide is gradually extensive, and demand also increases gradually, therefore, people hope to develop a kind of low energy consumption, high conversion rate, green environmental protection t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C209/00C07C211/63B01D61/44
CPCB01D61/445C07C209/00C07C211/63Y02A20/124
Inventor 刘铁群
Owner 刘铁群
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