Novel acidolysis technique of L-lactic acid

A new technology, lactic acid technology, is applied in the direction of carboxylate preparation, etc., which can solve the problems of long acidolysis cycle, low acidity, and low yield, and achieve the effect of short acidolysis cycle, high acidity, and high yield of lactic acid

Inactive Publication Date: 2019-05-28
郑健
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AI Technical Summary

Problems solved by technology

[0002] At present, the traditional lactic acid fermentation extraction adopts intermittent manual sulfuric acid acid hydrolysis technology, which has the disadvan

Method used

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Embodiment Construction

[0006] First determine the optimum temperature for the formation of large particles of calcium sulfate during acidolysis, use a temperature sensor to detect the end-point acidolysis temperature, and feed back to the sulfuric acid flow controller; use a precision pH meter to detect the pH value in the solution online, and feed back to the sulfuric acid flow controller device. Control the flow of sulfuric acid according to the set requirements, so as to achieve the purpose of controlling the temperature and pH of the solution in the area. Ultrasonic constant volume is used to add feed liquid twice or three times. During this period, the acid hydrolysis speed is guaranteed (low concentration, when the material is small, the stirring is uniform and the reaction speed is fast), and the acidity can be increased by increasing the concentration of the feed liquid. To achieve the effect of saving electricity and steam. Finally, when the reaction is completed and filtered, the stirring...

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Abstract

The invention relates to a novel acidolysis technique of L-lactic acid, and the technique is suitable for subsequent extracting procedures of L-lactic acid, and belongs to the technical field of chemical replacement and separation. The novel acidolysis technique comprises the following steps of continuous adding of sulfuric acid, online detection by a pH (potential of hydrogen) meter, endpoint compensation detection of a thermometer, liquid level constant volume by ultrasonic waves, control of stirring rotation speed of a reaction tank by a frequency converter, linkage secondary material supplementing and the like, and is characterized in that according to the online detection result of the pH meter and the endpoint compensation detection of the thermometer, the sulfur acid is continuouslyadded on line, and the constant volume is performed by ultrasonic positioning. The novel acidolysis technique of L-lactic acid has the advantages that the acidolysis cycle is short, the acidity is high, the yield rate of lactic acid is high, and the like.

Description

technical field [0001] The invention relates to a new technology of acidolysis of L-lactic acid, which is suitable for the subsequent extraction process of L-lactic acid and belongs to the technical field of chemical displacement separation. Background technique [0002] At present, the traditional lactic acid fermentation extraction adopts intermittent manual sulfuric acid acid hydrolysis technology, which has the disadvantages of long acid hydrolysis cycle, low acidity, unstable feed liquid quality, difficult filtration, low yield, low labor efficiency, and high energy consumption. Therefore, a fully automatic constant temperature continuous acid hydrolysis technology for L-lactic acid is designed to overcome the above-mentioned defects. Contents of the invention [0003] In order to shorten the acidolysis cycle, increase the acidity, and increase the yield of lactic acid, the invention provides a new technology for acidolysis of L-lactic acid. [0004] The present inve...

Claims

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Application Information

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IPC IPC(8): C07C51/02C07C59/08
Inventor 不公告发明人
Owner 郑健
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