Glutamic acid extraction crystallization process

Abstract

The invention belongs to the field of amino acid production, and discloses a glutamic acid extraction crystallization process, characterized by comprising the following steps: (1) separating by a disc type centrifuge, (2) separating by a horizontal screw centrifuge, (3) secondarily separating by the disc type centrifuge, (4) mixing, (5) combining, (6) concentrating, (7) performing isoelectric treatment, (8) feeding a concentrated solution, (9) cooling, (10) centrifuging by a flat plate centrifuge, (11) performing ion exchange, and (12) drying a thallus. By adopting the process, energy conservation and emission reduction are realized, and meanwhile the quality and the extraction rate of glutamic acid are ensured.

Description

technical field [0001] The patent of the invention relates to a glutamic acid extraction and crystallization process, which belongs to the field of amino acid production. Background technique [0002] Glutamic acid is an acidic amino acid. The molecule contains two carboxyl groups, and its chemical name is α-aminoglutaric acid. Glutamic acid was discovered by Li Suxun in 1856. It is a colorless crystal with umami taste, slightly soluble in water, but soluble in hydrochloric acid solution, with an isoelectric point of 3.22. A large amount exists in cereal protein, and the content in animal brain is also more. Glutamic acid plays an important role in the protein metabolism process in organisms, and participates in many important chemical reactions in animals, plants and microorganisms. MSG is prepared from glutamic acid. [0003] At present, the extraction process commonly used by domestic glutamic acid manufacturers is the isoelectric and ionoelectric extraction process, ...

AI Technical Summary

Problems solved by technology

However, this process has disadvantages such as large amount of sewage and high treatment difficulty, poor protein quality, low product quality, and large amount of acid and alkali.

[0004] In addition, some manufacturers adopt the continuous concentration isoelectric process to control the temperature of the glutamic acid fermentation liquid at 42-45°C after concentration, and then pour it into the isoelectric tank, and use sulfuric acid to control the pH of the isoelectric tank at about 3.2. Cool down in the cold tank, use a centrifuge to centrifuge glutamic acid, and discharge the centrifuged liquid to the sewage treatment plant. This process produces less sewage and does not have a separation process, but the yield and quality of glutamic acid are low