A method for low-temperature continuous batching in the chlorination step of sucralose production

Abstract

The invention relates to a method for continuous batching of sucralose chlorinated low-temperature reaction, comprising: feeding trichloroethane and thionyl chloride cooled to -1 to 5 degrees Celsius into a first-stage Y-shaped tube according to a certain flow ratio The two inlet ends of the reactor are mixed, and the mixed liquid flowing out from the outlet end of the first-stage Y-shaped tubular reactor is quenched in the condenser to 0~5°C and then enters the mixed liquid buffer tank; b: the mixed liquid and the esterification fixed According to a certain flow ratio, the liquid is poured into the two inlets of the secondary Y-shaped tubular reactor for mixing, and the secondary mixed liquid flowing out from the outlet of the secondary Y-shaped tubular reactor is quenched to 0~5°C Finally, it is poured into the enamel stirring reactor and cooled, and the secondary mixed liquid is metered and sent to the high-temperature reactor for high temperature. The process of the invention is simple, can realize the continuity of low-temperature reaction, adopts full automatic control, reduces the labor intensity of operators, shortens the reaction time, reduces energy consumption, and greatly improves the reaction yield and production efficiency.

Description

Technical field: [0001] The invention belongs to the technical field of sucralose production in the technical field of chemical industry, and in particular relates to a continuous batching method in the low-temperature step of the 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 out...

AI Technical Summary

Problems solved by technology

This step is carried out intermittently in the reactor, the reaction temperature is low, the reaction time is longer than 6 hours, and the operation is intermittent, with frequent operations, high labor intensity, difficult control of reaction conditions, and frequent fluctuations in process indicators caused by humans, resulting in low production efficiency. Moreover, most of them are controlled by manual on-site operation, and the human influence is relatively large. This reaction greatly limits the continuous industrial production of the sucralose industry, which is not conducive to the expansion and stability of sucralose production.

Images