Lactic acid is an important organic acid for the synthesis of polylactic acid. In recent years, many companies want to establish this project because lactic acid has a wide range of applications in food, medicine, medical polymer materials, chemical industry and other fields.
Lactic acid extraction process, the industry mostly uses microbial fermentation to produce lactic acid. The fermentation broth containing lactic acid or lactate is generated through fermentation, and then the lactic acid product is obtained through separation and extraction.
Among them, the separation and extraction of lactic acid is particularly important, which is the technical bottleneck and difficulty in the lactic acid production process. In particular, proteins, sugars, and inorganic salts are difficult to remove during the lactic acid purification process. Their presence will make the subsequent refining process (such as molecular distillation) difficult to carry out, and the yield of the obtained lactic acid product is low and the product quality is not high.
At present, the main methods for extracting lactic acid from fermentation broth include calcium salt method, extraction method, adsorption method, esterification method and membrane separation method, but each method has its advantages and disadvantages. With the continuous improvement of technology, the development and production of corresponding extraction equipment, the extraction method has a better effect.
At the same time, in order to solve the problems of large lactic acid loss, low yield, low purity, serious pollution, high energy consumption, complicated process and inability to produce continuously in the above lactic acid separation and extraction process. After a large number of experiments, Zhengzhou Tiei Extraction use the CWL-M centrifugal extractor, and adopt a new ionic solvent to extract the lactic acid in the crude lactic acid solution through coupled adsorption, so that the lactic acid is effectively separated from water and other impurities, and then the thermal sensitivity of the solvent is used to separate the lactic acid from the solvent.
Technical Features of Extraction Of Lactic Acid From Fermentation Broth
- High efficiency: the residual concentration of lactic acid in the feed aquous after coupled adsorption separation is low.
- Strong selectivity: only lactic acid and substances with the same polarity are adsorbed, and other substances are not adsorbed.
- Low production cost: coupled adsorption separation is carried out under normal pressure, no other raw materials are required.
- High separation quality: product quality indicators reach and partially exceed the level of similar international products.
- Simplified production process.
The above is a brief introduction to the method of extracting lactic acid from fermentation broth. Welcome contact us for more details.
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