A continuance method for preparing succinic acid

Abstract

The present invention provides a continuance method for preparing succinic acid includes following steps: adding succinate and inorganic acid into a first level reactor and reacting at a controlled temperature 30 to 95 DEG, and PH 1 to 5, then the reaction product overflowing to a second level reactor, adding succinate and inorganic acid into the second reactor and controlling the temperature at 10 to 80 DEG and PH 0.5 to 4, and then the second reaction product overflowing to a third reactor, adding succinate and inorganic acid into the reactor and controlling the temperature at 0 to 90 DEG and PH 1.5 to 2.5, then the third reactor discharging products into a solid-liquid separation device to obtain the succinate. The method is provided with advantages of high yield, good product quality and low energy consumption.

Description

technical field

[0001] The invention relates to the field of food chemical industry, in particular to a method for preparing succinic acid by continuously performing reaction and cooling crystallization. Background technique

[0002] Succinic acid, also known as succinic acid, is a binary organic acid. It is an important C4 platform compound and can be used as an intermediate in the synthesis of complex organic compounds. It is widely used in pharmaceuticals, food processing, synthetic plastics, rubber, Protective coatings, dyes and other industries.

[0003] At present, the traditional reaction and crystallization of succinate with inorganic acid are all carried out in batches, and the crystals produced are small, with large specific surface area and high impurity content, resulting in low yield of succinic acid, poor product quality, high consumption of excipients, Energy consumption and other issues.

[0004] Therefore, it is necessary to find a succinate reaction cryst...