Method for preparing tetrahydrofuran by using succinic acid fermentation broth

Abstract

The invention discloses a method for preparing tetrahydrofuran by using succinic acid fermentation broth, belonging to the technical field of biochemical engineering. According to the method, tetrahydrofuran is prepared by directly esterifying, hydrogenating and refining fermentation liquid containing butanedioic acid, so as to avoid the technological process of performing the consequent reaction after the butanedioic acid solid is obtained at high cost; bipolar membrane electrodialysis is used for removing sodium ions from butanedioic acid fermentation liquid which is subjected to filtering treatment, so as to reduce the influence on the service life of an esterified catalyst in the follow-up working section; the pigment in the fermentation liquid can be removed through rectification so as to prevent the activated carbon from decoloring. The method has the beneficial effects of avoiding the obtainment of the butanedioic acid solid, reducing a great amount of steam consumed in the process, and greatly lowering the cost; a sodium removal technology can be simplified, and the introduction of impurity negative ions can be avoided; the pigment can be removed through adopting a rectification and separation method while the refinement of tetrahydrofuran is realized.

Description

technical field [0001] The invention relates to a method for preparing tetrahydrofuran from the fermented liquid prepared from succinic acid by a fermentation method. In particular, it does not need to undergo decolorization of the fermented liquid, and does not need to obtain solid succinic acid. Tetrahydrofuran is directly prepared from the fermented liquid, and realized in the process of rectification. The invention relates to a process for removing pigment in fermentation liquid during the process, and belongs to the technical field of biochemical industry. Background technique [0002] Use succinic acid prepared by fermentation to produce tetrahydrofuran. The traditional process idea is to first obtain solid succinic acid from the fermentation broth, then esterify with methanol to produce dimethyl succinate, and finally the esterified product is hydrogenated. Tetrahydrofuran and butanediol are obtained. [0003] In order to obtain solid succinic acid in the...

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Problems solved by technology

[0006] In the traditional fermentation broth post-treatment process, most of them have a set of activated carbon adsorption decolorization system, but activated carbon inevitably adsorbs organic acid products during the adsorption decolorization process, which greatly reduces the product yield.

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