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Method for recycling glutamic acid from desalting liquid

A technology of desalting liquid and glutamic acid, applied in chemical instruments and methods, preparation of ammonium sulfate, organic compounds, etc., can solve the problems of short service life of resin, consumption of acid and alkali, large amount of impurities, etc., and achieve economic benefits. Lifting, simple process effect

Active Publication Date: 2011-07-13
LINGHUA GROUP INCORPORATED COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses resin adsorption and recovery, which consumes a lot of acid and alkali. At the same time, due to the complex composition of the mother liquor and the large amount of impurities, the service life of the resin is very short.
If the desalination solution is directly hydrolyzed, the most abundant impurity, ammonium sulfate, cannot be removed, so it cannot be applied industrially.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: the recycling method of glutamic acid in the desalting liquid, the steps are as follows:

[0018] (1) After the material is extracted from glutamic acid in one step, the waste mother liquor is evaporated, concentrated and crystallized to produce ammonium sulfate, and the mother liquor after ammonium sulfate is separated is desalted liquid;

[0019] (2) Add water to the desalted solution, the amount of water added is 20% of the volume of the desalted solution, until the ammonium sulfate is dissolved, and then sent to a tank with a cooling coil to cool down to 18°C, and the pH of the material is controlled to be 2.8. Utilize the plate and frame filter press again to material separation, the gained liquid material is that impurity enters the subsequent procedure, gained solid material (solid part is the glutamic acid of about 70% dry matter purity) by acid hydrolysis (adding 3 times of solid material water ( weight) and stir evenly, then add sulfuric acid acc...

Embodiment 2

[0020] Embodiment 2: the recovery and utilization method of glutamic acid in the desalination solution, the steps are the same as in Example 1, but the difference is: step (2) adds water to the desalination solution, the amount of water added is 30% of the volume of the desalination solution, until the ammonium sulfate is dissolved After completion, it is sent into a tank with a cooling coil to cool down to 22°C, and the pH of the material is controlled to be 3.4, and then the plate and frame filter press is used to separate the material.

Embodiment 3

[0021] Embodiment 3: the recycling method of glutamic acid in the desalted liquid, the steps are the same as in Example 1, but the difference is: step (2) adds water to the desalted liquid, the amount of water added is 25% of the volume of the desalted liquid, until the ammonium sulfate is dissolved After completion, it is sent into a tank with a cooling coil to cool down to 20°C, and the pH of the material is controlled to be 3.0, and then the plate and frame filter press is used to separate the material.

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PUM

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Abstract

The invention discloses a method for recycling glutamic acid from desalting liquid. The method comprises the following steps: adding water in desalting liquid to ensure that ammonium sulfate is dissolved, then sending the solution to a tank provided with a cooling coil to cool, then using a plate-and-frame filter press to separate material, sending the obtained liquid material, namely impurities to the subsequent process, performing acid hydrolysis to the obtained solid material, performing one-step extraction again, and purifying to obtain glutamic acid. The recovery rate is up to 60%-70%.

Description

technical field [0001] The invention belongs to the technical field of glutamic acid production, and in particular relates to a technical method for recycling glutamic acid in desalted liquid. Background technique [0002] In the production of monosodium glutamate, the methods for separating glutamic acid from starch or molasses fermentation liquid include hydrochloride method, zinc salt method, ion exchange method, isoelectric point crystallization method, isoelectric point crystallization-ion exchange method, continuous concentration, etc. Electric point-transfer crystal process, etc. Among them, the effect of concentrated continuous isoelectric point crystallization is better. In the concentrated continuous isoelectric point-transformation process, after the material is extracted with glutamic acid once, the waste mother liquor is evaporated, concentrated and crystallized to produce ammonium sulfate. After the ammonium sulfate is separated, the mother liquor is desalted ...

Claims

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Application Information

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IPC IPC(8): C07C229/24C07C227/40C01C1/24
Inventor 杨玉岭岳希金满德恩王正伟郭脉海
Owner LINGHUA GROUP INCORPORATED COMPANY
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