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Unintermittent acidolysis process for L-lactic acid

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

Inactive Publication Date: 2012-11-28
顾曰田
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the traditional lactic acid fermentation extraction adopts the intermittent manual sulfuric acid acid hydrolysis process, 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

Experimental program
Comparison scheme
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Embodiment Construction

[0009] First, determine the optimum temperature for the formation of large particles of calcium sulfate in acid hydrolysis, use a temperature sensor to detect the end-point acid hydrolysis 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 on the controller. 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 s...

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Abstract

The invention relates to an unintermittent acidolysis process for L-lactic acid, is suitable for the subsequent extraction process of the L-lactic acid, and belongs to the technical field of chemical separation by displacement. The process comprises the following steps of: continuously adding sulfuric acid, performing on-line detection by using a pH meter, performing finishing point compensation detection by using a thermometer, performing ultrasonic liquid level volume fixing, controlling the stirring speed of a reaction tank by using a frequency converter, performing linked secondary material supplementing, and the like. The process is characterized in that the sulfuric acid is continuously added on line according to the on-line detection result of the pH meter and the finishing point compensation detection result of the thermometer; and ultrasonic positioning is performed in the volume fixing step. The process has the advantages that the acidolysis period is short, the lactic acid has high acidity and yield, and the like.

Description

technical field [0001] The invention relates to a non-intermittent acidolysis process of L-lactic acid, which is suitable for the subsequent extraction process of 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 process, 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 non-intermittent acid hydrolysis process of L-lactic acid is designed, which can overcome the above-mentioned defects. Contents of the invention [0003] The object of the present invention is to provide a kind of L-lactic acid non-intermittent acid hydrolysis process, it can improve the quality of L-lactic acid acid hydrolysis. [0004] The present invention is realized throug...

Claims

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Application Information

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IPC IPC(8): C07C59/08C07C51/487
Inventor 顾曰田
Owner 顾曰田