Method for preparing high-purity benzyltrimethylammonium hydroxide by carrying out continuous electrolysis by virtue of three chambers and two membranes

A technology of benzyltrimethylammonium hydroxide and high-purity benzyltrimethyl is applied in electrolysis process, electrolysis components, electrolysis organic production and other directions, which can solve the problem of difficult large-scale safe production, low product purity and poor yield. Advanced problems, to achieve the effect of improving current efficiency and product conversion rate, reducing energy consumption, improving safety and reliability

Active Publication Date: 2015-05-20
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 carrying out continuous electrolysis by virtue of three chambers and two membranes

Examples

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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 1500 A / ㎡. After the electrolysis reaction, the concentration of the middle chamber 2 and the cathode chamber 3 is 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 carrying out continuous electrolysis by virtue of three chambers and two membranes. The method for preparing the high-purity benzyltrimethylammonium hydroxide by carrying out continuous electrolysis by virtue of the three chambers and two membranes comprises the following steps: enabling a 30-50% benzyltrimethylammonium hydroxide aqueous solution to enter an anode chamber from a raw material feeding hole, adding a 5-30% benzyltrimethylammonium hydroxide aqueous solution into an intermediate chamber, adding a 5-30% benzyltrimethylammonium hydroxide aqueous solution into a cathode chamber, opening all the circulating pumps, and turning on a power supply to switch on an anode plate and a cathode plate and carry out continuous electrolysis; and selecting by virtue of an anion membrane and continuously circulating and filtering to remove impurities, so that benzyltrimethylammonium hydroxide with high purity of 5-30% can be obtained. Concentration of each metal ion in the benzyltrimethylammonium hydroxide is less than 20ppb, concentration of each anion is less than 1ppm, product purity is high, current efficiency is 61-72%, utilization rate of electrical energy is high, energy is saved, and product conversion ratio is 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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IPC IPC(8): C25B3/00C25B9/10C25B9/18C25B9/23
CPCY02P20/10
Inventor 赵文洲
Owner 赵文洲
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