Method for preparing high-purity benzyltrimethylammonium hydroxide by continuous electrolysis with three chambers and two membranes

A technology of benzyltrimethylammonium hydroxide and high-purity benzyltrimethyl, which is applied in the direction of electrolysis process, electrolysis components, electrolysis organic production, etc. It can solve the problems of difficult large-scale safe production, low product purity and large amount of waste water To achieve the effect of improving current efficiency and product conversion rate, reducing energy consumption and saving membrane cost

Active Publication Date: 2017-07-21
赵文洲
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the disadvantages of low product yield, low product purity, inconvenient operation, large amount of waste water and difficulty in large-scale safe production in the existing production of benzyltrimethylammonium hydroxide, and provide a three-chamber two-membrane continuous electrolytic preparation The method of high-purity benzyltrimethylammonium hydroxide

Method used

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  • Method for preparing high-purity benzyltrimethylammonium hydroxide by continuous electrolysis with three chambers and two membranes

Examples

Experimental program
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Effect test

Embodiment 1

[0036] At a temperature of 25°C, add a 30% benzyltrimethylammonium chloride solution into the anode compartment 1, and the current density is 800A / m 2 , after the electrolysis reaction, the middle chamber 2 and the cathode chamber 3 have a concentration of 25% benzyltrimethylammonium hydroxide. The concentration of each metal ion in the product is less than 20 ppb, and the chloride ion is less than 1ppm (see Table 1); the current efficiency is 61%, and the product conversion rate is 98.2%.

Embodiment 2

[0038] At 25°C, add a 50% benzyltrimethylammonium chloride aqueous solution into the anode chamber 1, and use a current density of 1500A / ㎡. After the electrolysis reaction, the middle chamber 2 and the cathode chamber 3 have a concentration of 25%. Benzyltrimethylammonium Hydroxide. The concentration of each metal ion in the product is less than 20 ppb, and the chloride ion is less than 1ppm (see Table 1); the current efficiency is 63%, and the product conversion rate is 98.3%.

Embodiment 3

[0040] At a temperature of 50°C, add a 50% benzyltrimethylammonium chloride aqueous solution into the anode chamber 1, and the current density is 1500 A / m 2 , after the electrolysis reaction, the middle chamber 2 and the cathode chamber 3 have a concentration of 25% benzyltrimethylammonium hydroxide. The concentration of each metal ion in the product is less than 20 ppb, and the chloride ion is less than 1ppm (see Table 1); the current efficiency is 69%, and the product conversion rate is 98.5%.

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Abstract

The invention discloses a method for preparing high-purity benzyltrimethylammonium hydroxide by continuous electrolysis with three chambers and two membranes. The aqueous solution of benzyltrimethylammonium chloride with a concentration of 30% to 50% enters the anode chamber from the raw material feeding port. In the process, add an aqueous solution of benzyltrimethylammonium hydroxide with a concentration of 5 to 30% into the middle chamber, and add an aqueous solution of benzyltrimethylammonium hydroxide with a concentration of 5 to 30% into the cathode chamber to start all cycles Pump, turn on the power, connect the anode plate and the cathode plate for continuous electrolysis; after the selection of cationic membrane and continuous circulation filtration to remove impurities, 5%~30% high-purity benzyltrimethylammonium hydroxide, benzyl trimethylammonium hydroxide, benzyl The concentration of each metal ion in trimethylammonium hydroxide is less than 20 ppb, and the concentration of each anion is less than 1 ppm. The purity of the product is high, the current efficiency is 61-72%, the utilization rate of electric energy is high, energy is saved, and the conversion rate of the product is in More than 98%.

Description

technical field [0001] The invention relates to a method for preparing benzyltrimethylammonium hydroxide, in particular to a method for preparing high-purity benzyltrimethylammonium hydroxide by using benzyltrimethylammonium chloride as a raw material. Background technique [0002] Benzyltrimethylammonium hydroxide (BTMAH) is an organic base that can be used as a phase transfer catalyst, an alkali source for molecular sieve synthesis, and a template agent. It is mainly used in the fields of impurity removal agents and catalysts in the petroleum industry. The existing preparation methods of benzyltrimethylammonium hydroxide have the following: [0003] 1. Chemical method [0004] 1. It is prepared by reacting benzyltrimethylammonium halide with silver oxide in a solvent. The disadvantages are that the silver oxide is too expensive and the cost is too high. The silver halide precipitate contains a certain amount of product, and the yield is low, and After recovering part of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B3/00C25B9/10C25B9/18C25B9/23
CPCY02P20/10
Inventor 赵文洲
Owner 赵文洲
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