L-lactic acid full-automatic constant-temperature continuous acid hydrolysis technique

A fully automatic, constant temperature technology, applied in the preparation of carboxylate, can solve the problems of low acidity, low yield, long acidolysis cycle, etc., and achieve the effect of high lactic acid yield, high acidity, and short acidolysis cycle

Inactive Publication Date: 2015-09-30
陈丽
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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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Examples

Experimental program
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Example Embodiment

[0006] First determine the optimal temperature for calcium sulfate to form large particles in acid hydrolysis, use a temperature sensor to detect the end acid hydrolysis temperature, and feed it back to the sulfuric acid flow controller; use a precision pH meter to detect the pH value in the solution online, and feed it back to the sulfuric acid flow control 器上。 On the 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 feed the liquid in two or three times. During this period, the acid hydrolysis speed is guaranteed (the concentration is low, when the material is small, the stirring is uniform, and the reaction speed is fast), and the acidity can be improved by increasing the concentration of the feed liquid. To achieve the effect of power saving and steam saving. Finally, when the reaction is completed and filtered, the...

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Abstract

The invention relates to an L-lactic acid full-automatic constant-temperature continuous acid hydrolysis technique, which is suitable for an L-lactic acid subsequent extraction procedure and belongs to the technical field of chemical replacement separation. The technique comprises the following steps: continuously adding sulfuric acid, carrying out on-line detection by a pH meter, carrying out end point compensation detection by a thermometer, carrying out ultrasonic liquid level volume metering, controlling the stirring rate of the reaction tank by a frequency converter, carrying out linked secondary material supplementation and the like. The technique is characterized in that the sulfuric acid is continuously added on line according to the pH meter on-line detection result and thermometer end point compensation detection, and the volume metering adopts ultrasonic positioning. The technique has the advantages of short acid hydrolysis period, high acidity, high lactic acid yield and the like.

Description

Technical field [0001] The invention relates to an automatic constant temperature continuous acid hydrolysis technology 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, traditional lactic acid fermentation extraction adopts intermittent manual acid hydrolysis technology with sulfuric acid, which has the disadvantages of long acid hydrolysis cycle, low acidity, unstable liquid quality, difficult to filter, low yield, low labor efficiency, and high energy consumption. Therefore, a fully automatic constant temperature and continuous acid hydrolysis technology of L-lactic acid was designed to overcome the above-mentioned defects. Summary of the invention [0003] In order to shorten the acidolysis cycle, increase the acidity, and increase the yield of lactic acid, the present invention provides a L-lactic acid automatic constan...

Claims

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Application Information

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IPC IPC(8): C07C59/08C07C51/02
CPCC07C51/02
Inventor 不公告发明人
Owner 陈丽
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