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Method for separation and purification of L-potassium glutamate monohydrate

A technology of potassium glutamate and glutamic acid, applied in chemical instruments and methods, preparation of organic compounds, preparation of cyanide reactions, etc., can solve the problem of low yield, inability to obtain potassium L glutamate monohydrate, cost and cost. Energy consumption and other issues to achieve the effect of reducing pollution, changing the production environment, and uniform particle size

Inactive Publication Date: 2010-10-20
宜兴市前成生物有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The object of the present invention is to adopt direct spray drying method to separate and purify L-potassium glutamate pointed out by background technology and can't obtain the good L-potassium glutamate monohydrate of water content stable particle size and cost and energy consumption height, production To solve technical problems such as relatively low yield, provide a method for separating and purifying L-potassium glutamate monohydrate by induced crystallization

Method used

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  • Method for separation and purification of L-potassium glutamate monohydrate
  • Method for separation and purification of L-potassium glutamate monohydrate

Examples

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Embodiment 1

[0023] Add 500ml of deionized water into a 1000ml beaker, heat and stir on a magnetic stirrer, when the temperature rises to 70°C-75°C, add 100g of L-glutamic acid, K 2 CO 3 47g. After the reaction solution was clarified, samples were taken to measure the pH, and the corrected end point was pH=6.5-8.0. Add 0.01Kg / L of activated carbon, decolorize, press filter, and concentrate to form a supersaturated solution. After cooling down to 46°C, add 6g of seed crystal L-potassium glutamate and stir to cool and crystallize. Suction filtration, temperature 65°C-70°C 105g of the finished product was obtained by lower drying, the yield was 72.8%, and the test was qualified. The test results are shown in Table 1.

Embodiment 2

[0025] Add 500ml of deionized water into a 1000ml beaker, heat and stir on a magnetic stirrer, when the temperature rises to 75°C, add 100g of L-glutamic acid, K 2 CO 3 47g. After the reaction solution was clarified, samples were taken to measure the pH, and the corrected end point was pH=6.7-8.0. Add 0.01Kg / L of activated carbon, decolorize, press filter, and concentrate to form a supersaturated solution. After cooling down to 46°C, add 8g of seed crystal L-potassium glutamate and stir to cool and crystallize. Suction filtration, temperature 65°C-70°C 118g of the finished product was obtained by lower drying, the yield was 80.73%, and the test was qualified. The test results are shown in Table 1.

Embodiment 3

[0027] Add 500ml of deionized water into a 1000ml beaker, heat and stir on a magnetic stirrer, when the temperature rises to 70°C, add 100g of L-glutamic acid, K 2 CO 3 47g. After the reaction solution was clarified, samples were taken to measure the pH, and the corrected end point was pH=6.7-7.5. Add 0.01Kg / L of activated carbon, decolorize, press filter, and concentrate to form a supersaturated solution. After cooling down to 45°C, add 10g of seed crystal L-potassium glutamate and stir to cool and crystallize. Suction filtration, temperature 65°C-70°C 130g of the finished product was obtained by lower drying, the yield was 87.74%, and the test was qualified. The test results are shown in Table 1.

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Abstract

The invention belongs to the chemical field, and discloses a method for separation and purification of L-potassium glutamate monohydrate, which comprises the following specific steps: filling deionized water into a reactor, heating, adding L-glutamic acid and potassium carbonate, correcting the PH value after clarification of reaction solution, adding a proper amount of activated carbon for decolorization, filtering, concentrating to a certain concentration, adding a certain amount of L-potassium glutamate as a seed crystal into the reaction solution, and inducing the L-potassium glutamate in the reaction solution for crystallization, thereby forming an L-potassium glutamate monohydrate crystal. The L-potassium glutamate monohydrate crystal obtained in the method has the advantages of large and uniform particle size and stable water contents in each batch of products. Moreover, the invention can greatly reduce the cost, lower the energy consumption, increase the yield, improve the production environment, and reduce the pollution.

Description

technical field [0001] The invention relates to a method for separating and purifying L-potassium glutamate monohydrate, in particular to a method for separating and purifying L-potassium glutamate monohydrate by induced crystallization. Background technique [0002] L-glutamate potassium (Monopotassium L-Glutamate), alias: L-glutamate potassium salt, molecular formula: C 5 h 8 KNO 4 , molecular weight: 185.22, molecular structure formula: Its monohydrate, i.e. L-potassium glutamate monohydrate (molecular formula: C 5 h 8 KNO 4 ·H 2 O, molecular weight: 203.24, molecular structure formula: ) has a wide range of applications in the fields of food additives and pharmaceutical raw materials. [0003] People depend on food, and food-related industries have a stable development environment; food has already moved from basic needs to diversification of the industrial chain, especially in China with a long-standing food culture. Potassium glutamate as an additive can rea...

Claims

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Application Information

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IPC IPC(8): C07C229/24C07C227/42C07C227/18
Inventor 席日新李海涛吴国伟
Owner 宜兴市前成生物有限公司
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