Preparation method of L-sodium aspartate monohydrate

A technology of sodium aspartate and aspartic acid is applied in the field of preparation of L-aspartate sodium, which can solve the problems of large investment, large plant area and high production cost, and achieves simple production process and low equipment investment. , the effect of occupying a small workshop

Pending Publication Date: 2020-08-11
ANHUI ANLITAI BIOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned process mainly has the following defects: (1) waste water and waste residues are generated during the production process; (2) a large amount of energy is required in the product drying process; (3) the yield is low and the production cost is high; (4) the investment is large and it takes up Large plant area

Method used

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Examples

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preparation example Construction

[0020] A method for preparing sodium L-aspartate monohydrate, comprising the following steps:

[0021] S1. Raw material mixing: put L-aspartic acid and solid alkaline reactants in the mixing chamber for mixing to obtain the mixture for later use;

[0022] S2. Chemical reaction: the mixture is placed in a solid phase reactor for grinding, and a chemical reaction occurs to obtain reactants. The temperature in the solid phase reactor is controlled at 15°C to 80°C, and the vacuum degree in the solid phase reactor is controlled at 0.005MPa to 0 .lMPa;

[0023] S3, taking out the reactants.

[0024] All the reactants are in a solid state, and the chemical reaction is carried out in the solid state by mixing and grinding to form a solid product. The reaction does not require heating and does not produce "three wastes".

[0025] The technological process of solid-phase reaction synthesis Beta-alanine calcium is as follows:

[0026] L-aspartic acid+sodium hydroxide / sodium carbonate / ...

Embodiment 1

[0039] Take 1.33kg of L-aspartic acid, put it into a small vertical ball mill, adjust the speed to 1200 rpm, add 0.2kg of sodium hydroxide, and use water cooling to keep the temperature between 20°C and 60°C. After reacting for 30 minutes, add 0.15 kg of sodium hydroxide, continue grinding for 65 minutes, add 0.05 kg of sodium hydroxide again, finish grinding for 40 minutes, filter with 95% ethanol, and dry to obtain 1.65 kg of L-aspartic acid monohydrate (L-aspartic acid sodium yield 95.%).

Embodiment 2

[0041] Take 1.33kg of L-aspartic acid, put it into a small vertical ball mill, adjust the speed to 1200 rpm, add 0.3kg of sodium carbonate, use water cooling to keep the temperature between 20°C and 60°C, and react After 30 minutes, add 0.15kg sodium carbonate again, continue grinding for 65 minutes, add remaining 0.08kg sodium carbonate again, finish grinding for 40 minutes, filter with 95% ethanol, dry to obtain L-aspartic acid monohydrate 1.68kg ( L-sodium aspartate yield 97.%).

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Abstract

The invention provides a preparation method of an L-sodium aspartate monohydrate. The method comprises the following steps: S1, raw material mixing: mixing L-aspartic acid and a solid alkaline reactant in a mixing bin to obtain a mixture for further use; and S2, chemical reaction: introducing the mixture into a solid-phase reactor for grinding to realize chemical reaction and obtain a reaction product, and controlling the temperature in a solid-phase reactor to be 15 to 80 DEG C, and the vacuum degree to be 0.005 to 0.1MPa. The method has the advantages that the process is simple, the reactiontime is short, the yield is high, the energy consumption is low, the hard agglomeration phenomenon of the product is effectively avoided, no solvent is used, the environmental pollution is small, thesodium content is relatively high, safety and reliability are achieved, the cost is low, the method is a real green chemical reaction, and a guarantee is provided for low-cost production of the L-sodium aspartate monohydrate.

Description

technical field [0001] The invention relates to the technical field of preparation of sodium L-aspartate, in particular to a method for preparing sodium L-aspartate monohydrate. Background technique [0002] Sodium L-Aspartate (Sodium L-Aspartate, molecular weight 173.10) is an organic dibasic acid, which can generate acid salt when it is neutralized with alkali. Sodium L-Aspartate is colorless to white Crystal or crystalline powder, easily soluble in water, insoluble in alcohol. The aqueous solution is neutral to slightly alkaline. Because it has a seafood smell similar to shellfish, it is a food additive for umami taste. It is widely used as a freshness agent and preservative in the food industry, and can replace monosodium glutamate. [0003] The traditional process of producing sodium L-aspartate from L-aspartic acid uses water as the medium. First, the solid L-aspartic acid is reacted with sodium hydroxide or sodium carbonate in an aqueous solution, and then filtered ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C227/18C07C229/24
CPCC07C227/18C07C229/24
Inventor 马铭泽马云峰丁洋
Owner ANHUI ANLITAI BIOTECH CO LTD
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