PROCESS OF PURIFYING METHIONINE
First Claim
1. A process for purifying methionine, whereinmethionine is separated from a salt by-product by using a macroporous adsorption resin, in which the methionine is adsorbed onto the macroporous adsorption resin, and then the methionine is recovered by desorbing from the resin using a desorbent;
- and the salt by-product is not absorbed onto the macroporous adsorption resin during the adsorption process, but enters an effluent resulting from the adsorption, the process mainly comprising the following steps;
1) flowing a methionine solution, from the top to the bottom, through a macroporous adsorption resin layer, and stopping resin adsorption when the content of methionine in an effluent from the resin column is greater than or equal to 1 to 50% (w/w) of the content at an inlet, in which the effluent resulting from the resin adsorption is a salt by-product;
2) resin desorption;
desorbing, from the top to the bottom, the resin that has completed the adsorption in step
1) using a desorbent, and collecting the desorption solution; and
3) subsequent process;
subjecting the desorption solution to subsequent treatments following an existing process.
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Abstract
The present invention provides a process for purifying methionine. A methionine product having a purity of up to 99% or higher is obtained by separating methionine from a salt by-product through a process comprising adsorption and desorption using a macroporous adsorption resin, where the methionine content in the salt by-product is 0.03%. The yield of methionine extracted with the resin is up to 98% or higher. By using the process of the present invention, the existing production process is simplified, the quality of the methionine product is improved, and the production costs for methionine are reduced.
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17 Claims
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1. A process for purifying methionine, wherein
methionine is separated from a salt by-product by using a macroporous adsorption resin, in which the methionine is adsorbed onto the macroporous adsorption resin, and then the methionine is recovered by desorbing from the resin using a desorbent; - and the salt by-product is not absorbed onto the macroporous adsorption resin during the adsorption process, but enters an effluent resulting from the adsorption, the process mainly comprising the following steps;
1) flowing a methionine solution, from the top to the bottom, through a macroporous adsorption resin layer, and stopping resin adsorption when the content of methionine in an effluent from the resin column is greater than or equal to 1 to 50% (w/w) of the content at an inlet, in which the effluent resulting from the resin adsorption is a salt by-product; 2) resin desorption;
desorbing, from the top to the bottom, the resin that has completed the adsorption in step
1) using a desorbent, and collecting the desorption solution; and3) subsequent process;
subjecting the desorption solution to subsequent treatments following an existing process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- and the salt by-product is not absorbed onto the macroporous adsorption resin during the adsorption process, but enters an effluent resulting from the adsorption, the process mainly comprising the following steps;
Specification