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US 10,870,619 B2Granted
Method for preparing L-methionine crystals using crystallization technique
AssigneeCj Cheiljedang Corporation
InventorsJun-Woo Kim, In Sung Lee, Kee Kahb Koo, Wang Soo Kim, Allan S. Myerson
Life of this patent
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Abstract
The present application relates to a method for preparing L-methionine crystals with an improved bulk density. As the L-methionine crystals prepared according to the method for preparing L-methionine crystals of the present application may have a bulk density of up to 800 g/L, the L-methionine crystals are expected to reduce storage and transport costs of L-methionine powder and improve working conditions due to improved fluidity of the powder.
Claims11
A method for preparing L-methionine crystals, comprising:
- (a) adding a pH control agent to an aqueous solution comprising L-methionine to lower or increase the pH, a step of pH adjustment;
- (b) heating the aqueous solution comprising L-methionine, a step of heat treatment;
- (b-2) adding a pH control agent to the aqueous solution comprising L-methionine to increase or lower the pH, a step of pH readjustment, between Step (b) and Step (c) or in Step (c);
- and
- (c) extracting L-methionine crystals from the aqueous solution comprising L-methionine, which underwent pH adjustment and heat treatment, a step of extraction of crystals.
2 more elements
Dependencies are inferred from the claim text.