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Novel acidolysis process for L-lactic acid

A new process, acid hydrolysis technology, applied in the field of chemical displacement separation, can solve the problems of long acid hydrolysis cycle, low acidity, low yield, etc., and achieve the effects of short acid hydrolysis cycle, high acidity, and high yield of lactic acid

Inactive Publication Date: 2017-10-20
刘淼
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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 disadvantages of long acid hydrolysis cycle, low acidity, unstable feed liquid quality, difficult filtration, low yield, low labor efficiency, and high energy consumption.

Method used

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Examples

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Comparison scheme
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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 zone. 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 new L-lactic acid acidolysis process, which is suitable for the subsequent extraction process of L-lactic acid and belongs to the technical field of chemical displacement separation. It adopts steps such as continuous addition of sulfuric acid, online detection of PH meter, end point compensation detection of thermometer, constant volume of ultrasonic liquid level, frequency converter to control the stirring speed of reaction tank, linkage of secondary feeding and other steps. End-point compensation detection of the thermometer adds sulfuric acid continuously on-line; the constant volume is positioned by ultrasonic waves. The invention has the advantages of short acidolysis cycle, high acidity, high yield of lactic acid and the like.

Description

technical field [0001] The invention relates to a new L-lactic acid acidolysis process, 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 new process of L-lactic acid acid hydrolysis is designed, which can 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 L-lactic acid acidolysis process. [0004] The present invention is realized through the following process method, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C59/08C07C51/02
CPCC07C51/02
Inventor 不公告发明人
Owner 刘淼
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