Novel extraction process for lactic acid

A new process, lactic acid technology, applied in the preparation of carboxylate, separation/purification of carboxylic acid compounds, etc., can solve the problems of low acidity, low yield, long acidolysis cycle, etc., and achieve high acidity and high yield of lactic acid. , the effect of short acidolysis cycle

Inactive Publication Date: 2017-05-24
胡友霞
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  • Abstract
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  • Application Information

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Problems solved by technology

[0002] The traditional lactic acid fermentation extraction adopts the 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

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Embodiment Construction

[0006] Example: Determine the optimum temperature for the formation of large particles of calcium sulfate in acid hydrolysis, use a temperature sensor to detect the end 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, and the feeding liquid is added twice or three times. During this period, the acid hydrolysis speed is ensured (when the concentration is low and 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 feeding liquid. To achieve the effect of saving electricity and steam. Finally, when the reaction is completed...

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Abstract

The invention relates to a novel extraction process for lactic acid, applicable to later extraction of lactic acid and belonging to the technical field of chemical replacement and separation. The novel extraction process comprises the following steps: continuous addition of sulfuric acid; on-line detection via a pH meter; terminal point compensation detection via a thermometer; ultrasonic liquid level fixing; controlling of the agitation speed of a reaction tank via a frequency converter; linked two-step material supplementation; etc. The novel extraction process is characterized in that sulfuric acid is continuously added on line according to the on-line detection results of the pH meter and the terminal point compensation detection results of the thermometer; and ultrasonic positioning is employed for volume fixation. The novel extraction process provided by the invention has the advantages of a short acidolysis period, high acidity, high lactic acid yield, etc.

Description

technical field [0001] The invention relates to a new process for extracting 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] Traditional lactic acid fermentation extraction adopts 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. Thereby lactic acid manufacturers hope to have a kind of lactic acid extraction process that can overcome above-mentioned defect. 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 process for extracting lactic acid. [0004] The present invention is realized through the following process method, which adopts the steps...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C59/08C07C51/02C07C51/42C07C51/43
Inventor 不公告发明人
Owner 胡友霞
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