Preparation method of L-lysine

A technology for lysine and lysine hydrochloride, which is applied in the field of preparing L-lysine using ion exchange resins, can solve the problems of large amount of compound reagents, increased production costs, long process routes, etc., and achieve product yield High efficiency, short reaction cycle and low raw material price
CN102584614AInactive Publication Date: 2012-07-18宁波海硕生物科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
宁波海硕生物科技有限公司
Publication Date
2012-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of L-lysine. The method comprises the following steps of: (1) adding water into L-lysine hydrochloride, mixing uniformly, and fully dissolving; (2) adding a dissolved solution obtained in the step (1) into an ion exchange column filled with cation exchange resin at the flow speed of 12-15 liters per minute, and washing with water till an effluent of the column is free from Cl<->; (3) making 1.8-2.2mol / L of NH4OH flow through the ion exchange column at the flow speed of 12-15 liters per minute, and collecting an effluent which undergoes a ninhydrin reaction, i.e., L-lysine starts flowing out when the pH value of the effluent of the ion exchange column is 8.0; and (4) concentrating a collected solution under the reduced pressure of 0.1-0.3MPa at the temperature of 60-65 DEG C for removing ammonia, decolorizing with active carbon, filtering, cooling and crystalizing to obtain L-lysine. The method has the advantages of simple process flow, no use of a large quantity of compounds or chemical reagents, low raw material price, low environmental pollution and low manufacturing cost.
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Description

technical field

[0001] The invention relates to the technical field of L-lysine preparation, in particular to a novel method for preparing L-lysine by utilizing an ion exchange resin. Background technique

[0002] L-lysine is the first essential amino acid in the human body. It is an important carrier for the synthesis of nucleoprotein, hemoglobin and fatty acid metabolism - an important component of carnitine. It is also an important amino acid for promoting the regeneration of brain nerve cells. Lysine can increase pepsin And gastric acid secretion, so it can promote the appetite of the elderly and children. Lysine has a certain auxiliary effect on malnutrition, hepatitis B, bronchitis, etc. Together with iron compounds, lysine is effective in treating anemia.

[0003] At present, the L-lysine preparation technology in the prior art adopts a chemical synthesis method. This method has a long process route and a large amount of compound reagents. Therefore, it causes relat...

Claims

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