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Electrolysis method for hydrolyzing esters

An electrolysis method and ester technology, applied in the direction of electrolysis process, electrolysis components, organic chemical methods, etc., can solve the problems of high process conditions, high equipment and safety requirements, and difficult to be widely used in production, so as to simplify the process flow, The production process is simple and safe, and the effect of improving the hydrolysis reaction speed

Active Publication Date: 2013-04-03
河北协同环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its process conditions are relatively high, the pressure must be above 15Mpa, and the temperature must be between 152°C and 216°C. The requirements for equipment and safety are very high, and it is not easy to be widely used in production.

Method used

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  • Electrolysis method for hydrolyzing esters
  • Electrolysis method for hydrolyzing esters

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The present invention is applied to the production of vitamin C. The electrolytic hydrolysis device includes a cation exchange membrane 3, an anion exchange membrane 4 and a pair of electrodes, and the arrangement sequence is an anode plate 1, a cation exchange membrane 3, an anion exchange membrane 4 and a cathode plate 2; There are three reaction areas in the electrolytic hydrolysis device: anode chamber 5, cathode chamber 7 and hydrolysis chamber 6; the anode chamber 5 is between the anode plate 1 and the cation exchange membrane 3, and the cathode is between the cathode plate 2 and the anion exchange membrane 4 Chamber 7, the area between the anion and cation exchange membranes is the hydrolysis chamber 6.

[0030] After the whole set of equipment is installed, water is first pumped into the anode chamber and cathode chamber, methyl guronate is pumped into the hydrolysis chamber, and after the cycle is stabilized, a DC power supply is connected between the two electr...

Embodiment 2

[0033] The difference between this embodiment and Embodiment 1 is that the solution pumped into the hydrolysis chamber is methyl acetate, and methyl acetate is hydrolyzed under the action of hydrogen ions and hydroxide ions to generate acetic acid and methanol.

Embodiment 3

[0035] Its hydrolysis electrolysis device such as figure 2 shown. The present invention is used for the hydrolysis of methyl formate, and its electrolytic hydrolysis device comprises a cation exchange membrane 3 and a pair of electrodes, and its setting sequence is anode plate 1, cation exchange membrane 3 and cathode plate 2 successively, the work of this electrolysis hydrolysis device The area is the anode chamber 5 and the hydrolysis chamber 6 , that is, the anode chamber 5 is between the anode plate 1 and the cation exchange membrane 3 , and the hydrolysis chamber 6 is between the cathode plate 2 and the cation exchange membrane 3 .

[0036] After the equipment is installed, the water is pumped into the anode chamber, and the methyl formate solution is pumped into the hydrolysis chamber. After the cycle is stable, a DC power supply is applied between the anode and the cathode. At this time, in the anode chamber, water is electrolytically oxidized into oxygen and hydrogen...

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Abstract

The invention discloses an electrolysis method for hydrolyzing esters, which adopts an electrolytic hydrolysis device consisting of a cation exchange membrane, an anion exchange membrane and electrodes to perform hydrolysis on the esters. The method comprises the following steps of: a. pumping electrolyte into an anode chamber and a cathode chamber, and pumping ester solution into a hydrolysis chamber to perform circulation; b, applying direct current between a positive electrode and a negative electrode to perform electrolysis on water; and c, hydrolyzing the esters in the hydrolysis chamberby hydrogen ions and hydroxide ions to generate corresponding acids and alcohols. The electrolysis method performs catalysis on the hydrolysis of the esters by electrolyzing the water to directly obtain clear acid and alcohol products without adding any catalysts; besides, the method has a high material utilization ratio, no high-salt wastewater discharge and simple and safe process flows, and can be widely applied to production.

Description

technical field [0001] The invention belongs to the field of chemical production in chemical industry, and in particular relates to a method for hydrolyzing esters. Background technique [0002] The hydrolysis of esters is an important chemical reaction, which is widely used in petrochemical, pharmaceutical, chemical fiber, pesticide and many other industries. At present, the hydrolysis of esters is mostly carried out by catalysts, and commonly used catalysts include alkalis, amines, salts, enzymes, acids, etc. The use and regeneration of catalysts bring a lot of inconvenience to production, such as equipment corrosion, complicated process, and a large amount of waste generation, which do not meet the requirements of clean production and circular economy. [0003] For example, the production process of vitamin C is to react gulong acid with methanol to form methyl guronate, which is then hydrolyzed to form vitamin C and methanol. At present, in production practice, sulfuri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07B41/08C07B41/02C07D307/62C07C27/00C07C53/08C07C31/04C07C53/02C25B1/10
CPCY02E60/366Y02E60/36
Inventor 李文曦刘洪泉檀文礼赵立新石亚静
Owner 河北协同环境科技有限公司