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Process for preparing low-salt composite aminophenol powder

A compound amino acid and production method technology, which is applied in the production field of low-salt compound amino acid powder, can solve the problems of strict process and equipment requirements, high salt content, etc., and achieve the effects of low production cost, high recovery rate and simple production

Active Publication Date: 2011-06-15
湖北新生源生物工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is beneficial to remove hydrochloric acid to a certain extent before neutralization, but the process and equipment are strictly required, and the salt content in the mother liquor after neutralization is still relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 Take 5L of the mother liquor, and the total amino acid content is 167.54g / L. Add 15g of activated carbon to the mother liquor for decolorization, filter with a plate and frame, place the mother liquor after decolorization and 5L of triethylamine in the extraction tank and mix them while stirring While feeding carbon dioxide gas, until the ammonium ion concentration of the extraction raffinate is less than or equal to 1%, stop passing carbon dioxide, stop stirring, and let it stand for 30 minutes. The system is divided into two layers, and the lower water phase is the mother liquor after extraction and desalination. The oil phase in the upper layer is the extractant, and the water phase mother liquor in the lower layer of the system is taken away through the valve at the bottom of the tank, the mother liquor is concentrated and then spray-dried to obtain 946g of compound amino acid powder, the content of ammonium chloride salt is 2.84% after testing, and the tota...

Embodiment 2

[0025] Example 2 Take 5L of the mother liquor, and measure the total amino acid content of 167.54g / L, add 15g of activated carbon to the mother liquor for decolorization, filter the plate and frame, mix the filtrate and 2L of trioctylamine in the extraction tank, and pass in Carbon dioxide gas, until the concentration of ammonium ion in the extraction raffinate is ≤1%, stop passing carbon dioxide, stop stirring, let it stand for 50 minutes, the system is divided into two layers of oil phase and water phase, and take away the water phase mother liquid through the valve at the bottom of the tank , the mother liquor is concentrated and then spray-dried to obtain 953g of compound amino acid powder. After testing, its ammonium chloride salt content is 5.48%, and the total content of compound amino acid is 87.9%. Sodium solution 4L, stirring and mixing for 5 minutes, standing for stratification, separating the water layer from the valve at the bottom of the tank, and the oil layer in...

Embodiment 3

[0026] Example 3 Take 5 L of the mother liquor, and the total amino acid content is 165.07 g / L. Add 25 grams of activated carbon to the mother liquor for decolorization, filter the plate and frame, and mix the decolorized mother liquor with 1.25 L of tributylamine in an extraction tank. , feed carbon dioxide while stirring, until the ammonium ion concentration of the extraction raffinate is measured to be ≤1%, stop feeding carbon dioxide and stop stirring, let it stand for 60 minutes, the system is divided into two layers of oil and water, and take it out through the valve at the bottom of the tank The draining layer is the mother liquor, and the mother liquor is concentrated and dried to obtain 952 g of compound amino acid powder. After testing, the content of ammonium chloride is 7.48%, and the total content of compound amino acid is 85.8%. Add 4L of 3% ammonia water to the extraction tank with the remaining oil phase for back extraction, stir and mix for 5 minutes, let it st...

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PUM

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Abstract

The invention provides a production method for desalting a mother liquor after producing L-cystine by an extraction method and then producing a low-salt composite amino acid powder of amino acid by the desalted mother liquor, the method takes organic tertiary amine as an extractant, and the extractant is neutralized with ammonia for extracting cystine and then is mixed with the mother liquor by avolume ratio of 1:1-1:4 accompanied by agitation, a carbon dioxide gas is input in the process, the mixture is put standing until showing an oil phase and a water phase, effluent water phase matters are separated, and a product is obtained through concentration and drying, and the oil phase matters are regenerated as the extractant by dilute lye for recycling. The composite amino acid powder product produced by the method has the ammonium chloride content being reduced to below 10 percent, the composite amino acid total content of larger than 85 percent, and can serve as a high quality feedstuff additive, and the rate of recovery of amino acid can reach above 95 percent.

Description

technical field [0001] The invention relates to a method for desalting the mother liquor after producing L-cystine, and then using the desalted mother liquor to produce compound amino acids. Background technique [0002] The production of L-cystine from protein in animal hair is accomplished by hydrolyzing the hair protein raw material with concentrated hydrochloric acid at a temperature of about 110°C. In the hydrolysis method, using the principle that the solubility of the substance is the lowest at the isoelectric point, ammonia or alkali is added to the hydrolyzate to neutralize the isoelectric point of cystine, so that it is separated from the hydrolyzate, and then dissolved twice , crystallization and purification process to obtain L-cystine crystals. Ammonia used for neutralization includes ammonia gas, ammonium bicarbonate and ammonia water. The hydrolyzate after neutralizing and extracting cystine with ammonia is still the mother liquor, which contains various ami...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C227/28C07C323/58A23K1/16A23K20/142
Inventor 肖国安曾庆群章平吕德祥王祥兵史可贵苏华安
Owner 湖北新生源生物工程有限公司