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Method for preparing long-chain alkyl ammonium hydroxide by continuous electrolysis

A long-chain alkyl and ammonium hydroxide technology, which is applied in electrolysis process, electrolysis components, electrolysis organic production, etc., can solve the problems of unfavorable energy saving and industrial production, low service life of ionic membrane, slow reaction rate, etc. Achieve the effect of reducing energy consumption, avoiding loss and increasing mixing rate

Active Publication Date: 2015-01-28
CHINA RES INST OF DAILY CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] CN 103276403 A describes a method for preparing long-chain alkyl ammonium hydroxide by ion-exchange membrane electrolysis. The product produced by it has high purity, no pollution and low cost, but it prepares long-chain alkyl ammonium hydroxide by batch method, The service life of the ionic membrane is low, the energy consumption increases with the reaction, and the reaction rate slows down, which is not conducive to energy saving and industrial production

Method used

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  • Method for preparing long-chain alkyl ammonium hydroxide by continuous electrolysis
  • Method for preparing long-chain alkyl ammonium hydroxide by continuous electrolysis
  • Method for preparing long-chain alkyl ammonium hydroxide by continuous electrolysis

Examples

Experimental program
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Effect test

Embodiment 1

[0043] The electrolytic cell is divided into an anode electrolysis chamber 4 and a cathode electrolysis chamber 1 with an Asahi Kasei F4402 cation exchange membrane 18, and the anode electrolysis chamber and the anode circulation liquid static mixer 10, the external circulation heat exchanger 8, and the anode circulation discharge pump 7 form an anode circulation The loop, the cathode chamber, the static mixer 22 for the cathode circulating liquid, the external circulation heat exchanger 28, and the cathode circulation discharge pump 31 form the cathode circulation loop. Nitrogen gas is passed into the anode electrolysis chamber and the cathode electrolysis chamber to replace the air in the electrolysis chamber. Add 8Kg of octadecyltrimethylammonium methyl carbonate and 30Kg of water into a stirrer, and stir and react at 60°C for 1 hour to obtain octadecyltrimethylammonium bicarbonate with a concentration of 0.5mol / L aqueous solution. Add 15 L, 0.5 mol / L octadecyltrimethy...

Embodiment 2

[0045] The electrolytic cell is divided into an anode electrolysis chamber 4 and a cathode electrolysis chamber 1 with an Asahi Kasei F4403D cation exchange membrane 18, and the anode electrolysis chamber and the anode circulation liquid static mixer 10, the external circulation heat exchanger 8, and the anode circulation discharge pump 7 form an anode circulation The loop, the cathode chamber, the static mixer 22 for the cathode circulating liquid, the external circulation heat exchanger 28, and the cathode circulation discharge pump 31 form the cathode circulation loop. Nitrogen gas is passed into the anode electrolysis chamber and the cathode electrolysis chamber to replace the air in the electrolysis chamber. Add 7.4Kg of ammonium dodecyl trimethyl methyl carbonate and 25Kg of water into a stirrer, and stir and react at 50°C for 1.5h to obtain dodecyl trimethyl carbonate with a concentration of 0.65mol / L Aqueous solution of ammonium hydrogen. Add 16 L, 0.65 mol / L dodecyl...

Embodiment 3

[0047] The electrolytic cell is divided into an anode electrolysis chamber 4 and a cathode electrolysis chamber 1 with an Asahi Kasei F4602 cation exchange membrane 18, and the anode electrolysis chamber and the anode circulation liquid static mixer 10, the external circulation heat exchanger 8, and the anode circulation discharge pump 7 form an anode circulation The loop, the cathode chamber, the static mixer 22 for the cathode circulating liquid, the external circulation heat exchanger 28, and the cathode circulation discharge pump 31 form the cathode circulation loop. Nitrogen gas is passed into the anode electrolysis chamber and the cathode electrolysis chamber to replace the air in the electrolysis chamber. Add 4.5Kg ammonium octyltrimethylammonium methyl carbonate and 22Kg water into a stirrer, and stir and react at 45°C for 1.8h to prepare an aqueous solution of octyltrimethylammonium bicarbonate with a concentration of 0.7mol / L. Add 15 L, 0.7 mol / L octyltrimethylammoni...

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Abstract

The invention relates to a method for preparing long-chain alkyl ammonium hydroxide by continuous electrolysis. The method comprises the following steps: forming a circulation loop by virtue of an anode compartment, an anode static mixer, a heat exchanger and an anode circulating pump; forming a circulation loop by virtue of a cathode compartment, a cathode static mixer, a heat exchanger and a cathode circulating pump; carrying out electrolysis under a certain electrolytic condition; opening an anode charging pump while the electrolytic rate is gradually reduced; mixing a high concentration alkyl ammonium hydrogen carbonate aqueous solution and a low concentration anode liquid in an anode storage tank by virtue of the static mixer and feeding into the anode compartment to maintain the concentration of the anode compartment so as to ensure a relatively high electrolytic rate; and when the cathode liquid reaches a certain concentration, conveying the alkyl ammonium hydrogen carbonate aqueous solution to a product temporary storage tank by virtue of the cathode circulating pump. The method provided by the invention has the advantages of being free of pollution in the preparation process, low in cost and high in product impurity and can be continuously and industrially produced.

Description

technical field [0001] The invention belongs to a method for preparing long-chain alkyl ammonium hydroxide, in particular to a method for preparing long-chain alkyl ammonium hydroxide by continuous membrane electrolysis. Background technique [0002] As an important organic base, long-chain alkyl ammonium hydroxide has a wide range of uses and a large market demand. Because of its high etching rate, good crystal direction selectivity, good compatibility with complementary metal oxide semiconductor technology and low toxicity, it can be used as an etchant and developer for integrated circuit boards in the electronics industry. It can also be used as a catalyst in the synthesis of silicone, such as methyl silicone oil, amino silicone oil, silicone foam and other materials. In the manufacturing process of mechanical and microelectronic products, cleaning of grease and dirt on metal products is essential, and long-chain quaternary ammonium bases also have good application prosp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B3/00C25B15/00C25B15/02
Inventor 耿涛董子良李秋小姜亚洁鞠洪斌
Owner CHINA RES INST OF DAILY CHEM IND
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