Technology for decoloring refined mother liquor of monosodium glutamate with membrane method

Abstract

The invention provides a technology for decoloring refined mother liquor of monosodium glutamate with a membrane method, comprising the following steps for successively processing secondary-procedure mother liquor in the refined mother liquor of monosodium glutamate: (1) regulating and controlling the temperature of secondary-procedure mother liquor at 5-45DEG C; (2) regulating and controlling the baume degree of the secondary-procedure mother liquor at 20-30 degrees; (3) removing large particles from the secondary-procedure mother liquor processed by the steps (1) and (2) via a security filter; and (4) decoloring the secondary-procedure mother liquor processed by the step (3) in a nanometer membrane system; causing the processed decolored liquid to directly enter the subsequent carbon column decoloring working procedure for producing monosodium glutamate; and circularly carrying out the step (3)-(4) after a concentrated solution is returned to a material liquid box. According to the technology, the secondary-procedure mother liquor in the refined mother liquor of monosodium glutamate can be effectively decolored so as to replace the powdered carbon decoloring technology of the secondary-procedure mother liquor in the existing monosodium glutamate production.

Description

technical field [0001] The invention relates to a process for decolorizing the mother liquor of monosodium glutamate refined by membrane method. Background technique [0002] The main ingredient of monosodium glutamate is sodium glutamate, and a large amount of pigment is produced during the production process, which greatly affects the product quality. The existing production process for the decolorization of domestic monosodium glutamate refined mother liquor is figure 1 shown. [0003] In the existing monosodium glutamate refining process, glutamic acid is neutralized by alkali to produce a neutralization liquid, and the neutralization liquid is decolorized by powdered activated carbon, pressure filtration and activated carbon column decolorized, evaporated, concentrated and crystallized to obtain monosodium glutamate. The refined mother liquor produced after crystallization needs to be recycled. The first mother liquor, the second mother liquor, and the third mother li...

AI Technical Summary

Problems solved by technology

[0008] (4) Due to the addition of powdered activated carbon in the operation, the follow-up section needs to be filtered and removed by a filter press, which not only produces waste residue, but also makes the working environment worse, and the health of the operators is also affected;

[0009] (5) Since powdered activated carbon has adsorption effect on sodium glutamate, the yield of monosodium glutamate is relatively low

This part of washing water is reused to the first mother liquor as process water. While recycling water resources, it brings in more black pigment washed from powdered charcoal, and increases the workload of the decolorization process.

At the same time, due to the addition of washing water, the amount of steam used in the subsequent concentration process is greatly increased, resulting in more energy waste

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