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A kind of processing method of L-alanine waste mother liquor

A treatment method and technology of alanine, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as waste of L-alanine, environmental pollution, etc., reduce environmental pressure and simplify the treatment process , The effect of reducing equipment investment

Active Publication Date: 2019-07-30
QINHUANGDAO HUAHENG BIOENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The direct discharge of waste liquid will not only waste part of the unrecovered L-alanine, but also pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Get 1000L pH value to be 6, the L-alanine waste mother liquor that L-alanine content is 20% in clean and dry mixing tank, add 100g bentonite in the L-alanine waste mother liquor, stir while adding, After all the bentonite is added, stir for another 5 minutes; then add 50 g of polyaluminum chloride solution with a concentration of 10%, stir while adding, after adding all the polyaluminum chloride solution, stir for another 2 minutes, and finally let it stand for 1 hour.

[0026] The L-alanine waste mother liquor after adsorption and flocculation is stirred and precipitated, and then put into a vacuum drum filter device for separation to obtain an adsorption-flocculation clarified liquid; about 1000L of adsorption-flocculation clarified liquid is obtained, in which residual sugar The removal rate was 39.60%, the transmittance was 81%, and the loss rate of L-alanine was 15%. The pre-coating material in the vacuum pre-coating drum filter equipment is perlite.

[0027] Conc...

Embodiment 2

[0031] Get 1000L pH value is 7, the L-alanine waste mother liquor that L-alanine content is 20% is in clean and dry mixing tank, in described L-alanine waste mother liquor, add 100g bentonite, while adding Stir, after all the bentonite is added, stir for another 5 minutes; then add 50g of polyaluminum chloride solution with a concentration of 10%, stir while adding, after adding all the polyaluminum chloride solution, stir for another 2 minutes, and finally let it stand for 1 hour .

[0032] The L-alanine waste mother liquor after adsorption and flocculation is stirred and precipitated, and then put into a vacuum drum filter device for separation to obtain an adsorption-flocculation clarified liquid; about 1000L of adsorption-flocculation clarified liquid is obtained, in which residual sugar The removal rate was 41.24%, the transmittance was 73%, and the loss rate of L-alanine was 14%. The pre-coating material in the vacuum pre-coating drum filter equipment is perlite.

[00...

Embodiment 3

[0038] Get 1000L pH value to be 6, the L-alanine waste mother liquor that L-alanine content is 20% in clean and dry mixing tank, add 120g bentonite in the L-alanine waste mother liquor, stir while adding, After all the bentonite is added, stir for another 5 minutes; then add 50 g of polyaluminum chloride solution with a concentration of 10%, stir while adding, after adding all the polyaluminum chloride solution, stir for another 2 minutes, and finally let it stand for 1 hour.

[0039] The L-alanine waste mother liquor after adsorption and flocculation is stirred and precipitated, and then placed in a vacuum drum filter for separation to obtain an adsorption-flocculation clarified liquid; about 1000L of adsorption-flocculation clarified liquid is obtained, in which residual sugar The removal rate was 38.66%, the transmittance was 88%, and the loss rate of L-alanine was 26%. The pre-coating material in the vacuum pre-coating drum filter equipment is perlite.

[0040] Concentrat...

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Abstract

The invention discloses a treatment method for L-alanine waste mother liquor. The method comprises the following steps of (1) taking the L-alanine waste mother liquor, adjusting the pH value to be 5-7 under room temperature, successively adding a certain amount of bentonite and an inorganic flocculant for adsorption and flocculation; (2) carrying out stirring and precipitating treatment on the adsorbed and flocculated L-alanine waste mother liquor; (3) separating the L-alanine waste mother liquor after stirring and precipitating treatment to obtain adsorbed-flocculated clear liquor; (4) concentrating the clear liquor until the content of a dry matter reaches 55-65% at 75 DEG C, cooling to 20 DEG C and carrying out crystallizing and washing; (5) after crystallizing and washing are completed, separating crystal from crystal mother liquor; and (6) drying the crystal to obtain L-alanine. The impurities, such as salt, a sugar residue and a pigment in the waste mother liquor are precipitated and removed by adopting an adsorption-flocculation method, equipment investment is reduced, the material loss is avoided and the yield of the L-alanine is improved.

Description

technical field [0001] The invention relates to the technical field of chemical and chemical waste liquid treatment, in particular to a treatment method for L-alanine waste mother liquid. Background technique [0002] L-alanine (L-alanine), also known as L-alpha-alanine, is an important natural amino acid, which is the most abundant amino acid in the blood. It is closely related to glucose metabolism and is the main amino acid in the transamination reaction. Amino body has important physiological functions. It is a nutritional supplement, the main component of a variety of compound amino acid infusions, it can also be used as a pharmaceutical intermediate, and it is the main raw material of vitamin B6. It can also be used as a food additive to improve the nutritional value of food and improve the synthetic sweetness. The flavor of the flavoring agent. [0003] The production methods of L-alanine include proteolytic extraction, chemical synthesis, fermentation extraction an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C229/08C07C227/40C07C227/42
CPCC07C227/40C07C227/42C07C229/08
Inventor 宋山唐思青刘敬一田禾旺刘家明程晓伟
Owner QINHUANGDAO HUAHENG BIOENG CO LTD