A kind of treatment method of sucralose neutralization solution concentration residue

Abstract

The invention relates to a treatment method for the concentrated residue of sucralose neutralizing liquid, which comprises the following steps: 1) adding water to dissolve the neutralizing liquid after depressurizing and concentrating, putting it into a heat preservation kettle, adding activated carbon to stir and absorb the viscous matter; 2) standing still Put the supernatant liquid layer in the heat preservation kettle from the side port into the static tank; 3) press filter the supernatant liquid after standing for half an hour to remove activated carbon and sticky matter, and add ethyl acetate to the obtained filtrate to extract sucralose‑6‑B 4) Add water and heat and stir the viscous matter remaining in the heat preservation kettle, and put it into the slag washing kettle through the bottom valve; 5) Add water to the solution in the slag washing kettle and stir to heat up, and after 3 hours of heat preservation at 80°C, wash the slag The solution in the kettle is press-filtered to obtain a waste residue filter cake and sent to the solid waste center. The obtained filtrate contains 25-30 g / l of sucralose-6-ethyl ester and is sent to the purification section. syrup. The invention has the advantages of effectively solving the problem of cleaning the settling tank, recovering the sucralose-6-ethyl ester to the greatest extent, and reducing the pollution to the environment.

Description

technical field [0001] The invention relates to the field of food additive production, in particular to a method for treating the concentrated residue of sucralose neutralization solution. Background technique [0002] In the production of sucralose, after neutralization of the chlorinated solution to remove ammonium chloride salt and some carbides, it is necessary to carry out vacuum distillation on the neutralized solution to recover trichloroethane and DMF. Since the boiling point of DMF is 153°C and the And its intermediates are heat-sensitive substances, which tend to produce viscous by-products in the process of recovery under reduced pressure. These by-products need to be removed, otherwise they will be brought into the subsequent system to affect product quality. The usual measures are to find a receiving tank to settle the viscous matter inside, and extract the clear liquid above for pressure filtration. Often, insufficient settlement will cause the filter cloth of...

AI Technical Summary

Problems solved by technology

The usual measures are to find a receiving tank to settle the viscous matter inside, and extract the clear liquid on it for pressure filtration. Often, the sedimentation is insufficient and the filter cloth of the filter press is blocked and cannot be filtered, and the replacement frequency of the filter cloth is high.

The viscous matter in the settling tank is not easy to clean, people have to dig into the tank with a shovel, because it takes 3-4 hours to clean up once because of the viscousness; put the viscous matter that has been cleaned out into a small iron car, because about 20% of it is entrained Sucralose-6-ethyl ester, causing material waste, and transported to the solid waste center can only be placed in a small car, the transportation efficiency is low

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