Production method of monosodium glutamate

Production methods of monosodium glutamate: hydrolysis, fermentation, synthesis and extraction.

different mesh monosodium glutamate

1. Hydrolysis

Principle: The protein raw material is hydrolyzed by acid to produce glutamic acid, and glutamic acid hydrochloride is used

It has the minimum solubility in hydrochloric acid. Glutamic acid is separated and extracted, and then

The monosodium glutamate is prepared by neutralization treatment.

Common protein raw materials in production – gluten, soybean, corn, etc.

Hydrolysis neutralization

Protein raw material — glutamic acid — monosodium glutamate

2. Fermentation


Starchy raw materials are hydrolyzed to produce glucose, or molasses or acetic acid is directly used as

Raw materials: glutamic acid is biosynthetically synthesized by glutamic acid producing bacteria, and then neutralized and extracted

Make MSG.


Starchy raw materials – → sugar liquor – → glutamic acid fermentation – → neutralization – → monosodium glutamate

3. Synthetic method

Principle: the petroleum cracking gas propylene is oxidized and ammoniated to produce acrylonitrile

Cyanidation, hydrolysis and other reactions produce racemic glutamic acid, which is then divided into L-glutamic acid,

Then it is made into monosodium glutamate.

Propylene → oxidation and ammoniation → acrylonitrile → glutamic acid → monosodium glutamate


4. Extraction method

Principle: Take waste molasses as raw material, first recover the sucrose in waste molasses, and then recycle the waste liquid

The monosodium glutamate was prepared by hydrolyzing and concentrating with alkali method, extracting glutamic acid, and then preparing monosodium glutamate.


Hydrolysis, concentration neutralization, extraction

Waste molasses — → glutamic acid — → monosodium glutamate

Post time: Dec-07-2022
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