Chlorination liquid continuous neutralization method in sucralose production

Abstract

The invention relates to a continuous neutralization method for a chlorination section in sucralose production. The method comprises the following steps: a, continuously pumping a chlorination solution and ammonia water into a 1 # neutralization kettle for circular reaction, and controlling the pH value of the reaction solution to be 6-7 and the temperature to be 15+/-1 DEG C; b, continuously pumping chlorination liquid after the reaction in the 1 # neutralization kettle and ammonia water into a 2 # neutralization kettle for circular reaction at a pH value of 8-9 and a temperature of 25+/-1 DEG C; c, continuously pumping chlorination liquid after the reaction in the 2 # neutralization kettle and ammonia water into a 3 # neutralization kettle for circular reaction at a pH value of 9.2-9.5 and a temperature of 25 +/-1 DEG C; and d, continuously pumping chlorination liquid after the reaction in the 3 # neutralization kettle and hydrochloric acid into a 4 # neutralization kettle for reaction at a pH value of 7-7.5 and a temperature of 25+/-1 DEG C to finally obtain a chlorination neutralization liquid, and returning to the subsequent process. According to the invention, the reaction time of the chlorination liquid under different PH value conditions is shortened, the side reaction is reduced, the full-automatic control continuous reaction is realized, the energy consumption is reduced, and the production efficiency and the neutralization liquid reaction yield are improved.

Description

Technical field: [0001] The invention belongs to the technical field of chemical production, and in particular relates to a method for continuous neutralization of a chlorination section in the production of sucralose. Background technique: [0002] Sucralose (Sucralose or TGS CNS: 19.016; INS: 955), also known as sucralose, sucrose, or 4, 1, 6, -trichloro-4, 1, 6, -trideoxygalactose, English name : Sucralose. Sucralose is made from sucrose by chlorination. Sucralose is a fresh sweetener, its sweetness is 600-800 times that of sucrose, and its sweetness is similar to that of sucrose, and sucralose is not absorbed by the human body, has no bioaccumulation, high safety, and can be used widely , can be used as a food additive to achieve the effect of reducing sugar and sugar, so the sucralose industry has developed rapidly in recent years. The number of production enterprises has gradually increased, and the output has continued to increase. [0003] In the production of su...

AI Technical Summary

Problems solved by technology

[0003] In the production of sucralose, after the chlorination reaction, it is necessary to neutralize the chlorination solution with ammonia water. The prior art uses a single tank for chlorination and neutralization, which takes a long time, has insufficient neutralization effect, and low yield. It is easy to produce a large number of by-products in the process, which increases the discharge of waste, and many people are required to monitor and operate in large-scale production, and the labor cost is high.

This reaction greatly limits the continuous industrial production of sucralose industry, which is not conducive to the expansion and stability of sucralose production

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