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A preparation method for hydrochloric acid concentration membrane

A hydrochloric acid, membrane technology, applied in chemical instruments and methods, membrane, membrane technology, etc., can solve the problems of long process, inability to concentrate, high energy consumption, and achieve the effect of improving permeability

Active Publication Date: 2018-03-16
天门澳锦化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The hydrochloric acid concentration technology in the prior art is mainly based on evaporation, distillation, and extraction distillation, which has the disadvantages of high energy consumption and long process. A new concentration process is urgently needed to improve efficiency and reduce energy consumption
The electrodialysis method can only concentrate 1-5% (wt%) dilute hydrochloric acid to about 10% (wt%) hydrochloric acid, and the existing diffusion dialysis method and osmotic concentration technology involving membranes can only concentrate to 10% (wt%) ) of hydrochloric acid, can not be further concentrated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] In a 2000L reactor, 100Kg of polyvinylidene chloride film, 30Kg of trifluoromethylsulfinyl chloride, 300Kg of methylsulfonyl fluoride, 2Kg of methylpyrrolethione, 0.03Kg of 1-ethyl-3- Methylimidazolium bis(trifluoromethylsulfonyl)imide, soaked at 64°C for 20 hours, then fished out and dried to obtain a permeable membrane. Product number B-1.

Embodiment 2

[0017] In a 2000L reactor, 100Kg polyvinylidene chloride film, 10Kg trifluoromethylsulfinyl chloride, 10Kg methylsulfonyl fluoride, 1Kg methylpyrrolethione, 0.01Kg 1-ethyl-3-methyl Imidazolium bis(trifluoromethylsulfonyl)imide, soaked at 50°C for 40 hours, then fished out and dried in the air to obtain a permeable membrane. Product number B-2.

Embodiment 3

[0019] In a 2000L reactor, 100Kg polyvinylidene chloride film, 50Kg trifluoromethylsulfinyl chloride, 500Kg methylsulfonyl fluoride, 5Kg methylpyrrolethione, 0.1Kg 1-ethyl-3-methyl Imidazolium bis(trifluoromethylsulfonyl)imide, soaked at 80°C for 10h, then fished out and dried in the air to obtain a permeable membrane. Product number B-3.

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PUM

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Abstract

The invention relates to a method for preparing a hydrochloric acid concentration membrane. The hydrochloric acid concentration membrane is made of a polyvinylidene fluoride (PVDF) film, 1-trifluoro-methyl sulfinyl chloride, methyl sulfonyl fluoride, methyl pyrrole thioketone, and 1-ethyl-3-methylimidazole bi(trifluoromethyl sulfonyl) imine in a modification manner.

Description

technical field [0001] The invention relates to a method for preparing a membrane, in particular to a method for preparing a membrane for hydrochloric acid concentration. Background technique [0002] In the production process of many enterprises in various chemical industries, rare earth industries, metal smelting industries, waste recycling industries, chlorination titanium dioxide, and fluorine chemical industries, there will be a lot of waste hydrochloric acid with low concentration and impurities. . If these waste acids are not treated and discharged directly, it will cause serious pollution to the environment; if these waste acids are discharged after neutralization, it will not only cause secondary pollution, but also increase the treatment cost, which is not good for the economy. Therefore, it is the most effective solution to concentrate and purify the waste hydrochloric acid for reuse. In this way, waste hydrochloric acid has been reused and turned into resources...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/34B01D67/00C08J7/00C01B7/07
CPCB01D67/0093B01D71/34B01D2323/46C01B7/0706C08J7/00C08J2327/16
Inventor 王琪宇
Owner 天门澳锦化工有限公司