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Method for purifying tetrapropylammonium hydroxide based on diffusion dialysis

A technology of tetrapropylammonium hydroxide and diffusion dialysis, which is applied in the purification/separation of amino compounds, organic chemistry, etc., can solve the problems of poor purification and treatment effect of tetrapropylammonium hydroxide, environmental impact, etc., and improve convenience Effect

Inactive Publication Date: 2019-01-15
南京元亨化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the purification treatment effect of tetrapropylammonium hydroxide existing in the prior art is often not good, and at the same time, in the purification process, it is usually accompanied by the generation of harmful substances, thereby causing a certain impact on the environment. The invention provides a Purification method of tetrapropyl ammonium hydroxide based on diffusion dialysis

Method used

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  • Method for purifying tetrapropylammonium hydroxide based on diffusion dialysis

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Embodiment 1

[0014] A kind of purification method based on the tetrapropyl ammonium hydroxide of diffusion dialysis, it adopts such as figure 1 The shown diffusion dialysis device is purified, and the diffusion dialysis device includes an alkali chamber 2, a water chamber 1 and an anion exchange membrane 3 arranged between the alkali chamber and the water chamber, wherein the effective area of ​​the anion exchange membrane is 120.7cm 2 . 250ml of tetrapropylammonium hydroxide with a molar concentration of 0.66mol / L was added to the alkali chamber, and 250ml of deionized water was added to the water chamber for treatment for 100 hours to complete the purification of tetrapropylammonium hydroxide.

[0015] The molar concentration of tetrapropylammonium hydroxide obtained in the final water compartment is 0.32*10 -2 mol / L, wherein, the concentration of bromide ion is 450ppm; Tetrapropyl ammonium hydroxide molar concentration is 0.63mol / L in the alkali chamber, and wherein, the concentration ...

Embodiment 2

[0017] The diffusion dialysis device of the present embodiment is the same as that of Example 1, except that adding a molar concentration of 1.0mol / L tetrapropyl ammonium hydroxide 250ml in the alkali chamber and adding 250ml of deionized water in the water chamber; After the same time, the molar concentration of tetrapropylammonium hydroxide obtained in the water chamber is 0.60*10 -2 mol / L, wherein the concentration of bromide ions is 600ppm; the molar concentration of tetrapropylammonium hydroxide in the alkali chamber is 0.9mol / L, wherein the concentration of bromide ions is 65.5ppm.

Embodiment 3

[0019] The diffusion dialysis device of the present embodiment is the same as that of Example 1, except that 250 ml of tetrapropylammonium hydroxide of 1.25 mol / L is added in the alkali chamber, and 250 ml of deionized water is added in the water chamber; the treatment is the same as in Example 1 After the same time, the molar concentration of tetrapropylammonium hydroxide obtained in the water chamber is 1.0*10 -2 mol / L, wherein, the concentration of bromide ion is 650ppm; Tetrapropyl ammonium hydroxide molar concentration is 1.24mol / L in the alkali chamber, and wherein, the concentration of bromide ion is 95ppm;

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Abstract

The invention provides a method for purifying tetrapropylammonium hydroxide based on diffusion dialysis. The method is characterized in that a diffusion dialysis device is used for purification; the diffusion dialysis device comprises an alkali chamber, a water chamber and an anion exchange membrane arranged between the alkali chamber and the water chamber; a tetrapropylammonium hydroxide solutionis added into the alkali chamber, and water is added into the water chamber, wherein the volumes of the tetrapropylammonium hydroxide solution and the water are identical; and static treatment in thediffusion dialysis device is performed for 80 to 110 h so as to complete purification. The purification method of the invention can effectively reduce impurity ions in tetrapropylammonium hydroxide,especially bromide ions; purification operation is simplified, and no manual intervention is needed in the process of purification, so the convenience of related operations is significantly improved;in addition, since the tetrapropylammonium hydroxide is purified by dynamic diffusion dialysis in the purification process, other chemicals are not involved, so no related waste materials are produced.

Description

technical field [0001] The present invention relates to a kind of processing method of tetrapropyl ammonium hydroxide, especially a kind of purification method based on the tetrapropyl ammonium hydroxide of diffusion dialysis. Background technique [0002] Tetrapropylammonium hydroxide (TPAOH) is a quaternary ammonium base, which has a wide range of uses in the industrial field, such as in the semiconductor industry as an organic etchant, as a basic organic chemical reagent, and reacts with various acids to prepare the corresponding ammonium The salt, as a phase transfer catalyst, acts as a templating agent in the synthesis process of zeolite molecular sieves. With the development of society and the advancement of technology, higher requirements have been placed on the concentration and purity of tetrapropylammonium hydroxide in industrial applications, especially the content of impurity halide ions. For example, the template agent required for TS-1 molecular sieve requires...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C209/84C07C211/63
CPCC07C209/84C07C211/63
Inventor 张新胜杜文豪杨国彦
Owner 南京元亨化工科技有限公司
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