Method for treating isoelectric glutamic acid mother solution in monosodium glutamate production

A treatment method, glutamic acid technology, applied in the field of monosodium glutamate, can solve problems such as bipolar membrane electrodialysis hydrogen leakage

Active Publication Date: 2013-10-16
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to basically overcome the various defects of the existing methods for processing glutamic acid and other electric mother liquors, thereby providing a treatment method for glutamic acid and other electric mother liquors in the production of monosodium glutamate
[0009] The processing method of the present invention can solve the problem of hydrogen leakage occurring in bipolar membrane electrodialysis

Method used

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  • Method for treating isoelectric glutamic acid mother solution in monosodium glutamate production
  • Method for treating isoelectric glutamic acid mother solution in monosodium glutamate production
  • Method for treating isoelectric glutamic acid mother solution in monosodium glutamate production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] The bipolar membrane electrodialyzer is a three-chamber bipolar membrane electrodialyzer with one stage and a single unit operating independently, and the liquid flow direction in adjacent compartments adopts co-current flow. The area of ​​the ion exchange membrane is 210mm×62mm, using BP-1 bipolar membrane, JAM-10 anion exchange membrane and JCM-1 cation exchange membrane. The bipolar membrane, anion exchange membrane, and cation exchange membrane form a three-compartment membrane stack structure (such as Figure 5 ) Repeat 5 pairs. Use titanium coated ruthenium electrode as anode plate and stainless steel electrode as cathode plate. The partition and the screen are made of polypropylene material, the partition is a non-loop partition, and the partition is a woven mesh type.

[0093] See image 3 . Pass 4.8L of glutamic acid and other electrochemical mother liquor containing 42g / L ammonium sulfate and 18g / L glutamic acid from Shenyang Hongmei Monosodium Glutamate Factor...

Embodiment 2

[0096] The bipolar membrane electrodialysis device is the same as in Example 1.

[0097] Pass 4.8L of glutamic acid and other electrochemical mother liquor containing 34g / L of ammonium chloride and 17g / L of glutamic acid into the salt chamber; the initial liquid of the acid chamber is the filtrate of 1.0L glutamic acid fermentation broth, containing glutamic acid About 104g / L, the initial solution of the caustic chamber is 1L 0.05mol / L sodium hydroxide solution, and the two electrode chambers are both 1L 0.25mol / L sodium sulfate solution.

[0098] Control current density 30mA / cm during operation 2 , The linear velocity of liquid flow in each compartment is 3cm / s, and the temperature of material and liquid in each compartment is 30℃. Air is blown into the caustic chamber material cylinder, and the regenerated ammonia is blown out with air at a blowing rate of 1 liter / min. The ammonia blown from the alkali chamber is passed into a stainless steel coil placed in a refrigerator at -60...

Embodiment 3

[0100] The bipolar membrane electrodialysis device is the same as in Example 1.

[0101] Pass 4.8L of glutamic acid isoelectric mother liquor containing 51g / L of ammonium nitrate and 19g / L glutamic acid into the salt chamber; the initial liquid of the acid chamber is 1.0L glutamic acid fermentation broth, containing about 105g / L glutamic acid . The initial solution of the alkali chamber is 0.5L ammonia water with a mass concentration of 0.5%, and the two electrode chamber liquids are both 1L 0.25mol / L sodium sulfate solution.

[0102] Control current density 30mA / cm during operation 2 , The linear velocity of liquid flow in each compartment is 3cm / s, and the temperature of material and liquid in each compartment is 30℃. When the pH of the acid chamber drops to 4.2, the acid chamber appears turbid (glutamic acid crystals). At this time, continue the bipolar membrane electrodialysis operation, and connect the feed liquid inlet and outlet of a 1 liter hydrocyclone to the acid chamber...

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Abstract

The invention relates to a method for treating isoelectric glutamic acid mother solution in monosodium glutamate production, which comprises the following steps of: introducing the isoelectric glutamic acid mother solution containing ammonium sulfate, ammonium chloride or ammonium nitrate into a salt chamber of a three-chamber bipolar membrane electrodialyzer or an 'acid-salt' two-chamber bipolar membrane electrodialyzer by adopting a bipolar membrane electro-dialysis technology, wherein the solution containing the glutamic acid is used as initial solution of an acid chamber; and finally, obtaining inorganic salt removed isoelectric mother solution in the salt chamber, obtaining solution containing the glutamic acid and the regenerated sulfuric acid, hydrochloric acid or nitric acid in the acid chamber, and obtaining regenerated ammonia. The treatment method makes full use of the acidity and the alkalinity of the glutamic acid to reduce the H+ concentration of the acid chamber of the bipolar membrane electrodialyzer and relieve the H+ seepage from the acid chamber to the salt chamber, so that the regenerated acid can be recycled to an isoelectric crystallization step without being concentrated.

Description

Technical field [0001] The invention belongs to the monosodium glutamate industry, and in particular relates to a method for processing glutamic acid and other electro-mother liquors in the production of monosodium glutamate. Background technique [0002] MSG, the scientific name Monosodium Glutamate (Monosodium Glutamate, referred to as MSG). MSG is an important food additive that can enrich and improve the flavor of food, and is widely used in food and food processing industries. my country is a major producer of MSG, with an output of approximately 1.35 million tons in 2005, accounting for more than 70% of the world's total output. MSG is refined from glutamic acid (called glutamic acid) extracted from fermentation. [0003] Our country mainly produces glutamic acid by fermenting starch. During the fermentation process, ammonia is continuously added to maintain the pH of the fermentation broth at about 7. After the fermentation, the isoelectric crystallization step is used to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/48A23L1/228A23L27/22
Inventor 丛威王倩杨鹏波杨晓丽吴霞石绍渊张勇
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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