Method for decoloration of succinic acid fermentation broth by ion exchange resin

Abstract

The invention relates to a method for decoloration of a succinic acid fermentation broth by an ion exchange resin. The method provided by the invention comprises a process of carrying out the decoloration of a succinic acid fermentation broth by an ion exchange resin and the process comprises 1, carrying out centrifugation impurity-removal of the succinic acid fermentation broth to obtain a solid-free succinic acid fermentation broth, 2, connecting a cation exchange resin and an anion exchange resin in series and carrying out pretreatment, 3, at a temperature of 30 to 50 DEG C, adding the solid-free succinic acid fermentation broth obtained by the step 1 into the ion exchange resin treated by the step 2, and carrying out decoloration so that colored matters and impurities are adsorbed by the ion exchange resin and thus a decolored succinic acid fermentation broth is obtained. Compared with the prior art, the method has the advantages that the ion exchange resin has good selective adsorbability of pigments and thus the pigments can be dissociated easily so that only water-washing is needed; and the ion exchange resin can be regenerated by acid-washing and alkali-washing.

Description

technical field [0001] The invention relates to the field of separation and purification of succinic acid, in particular, the invention relates to a method for decolorizing succinic acid fermentation liquid by using an ion exchange resin. Background technique [0002] Succinic acid, also known as succinic acid, is a weakly acidic dibasic organic carboxylic acid. It is an important metabolite of microbial tricarboxylic acid cycle and glycolysis pathway. It can be produced by microbial fermentation, because of its unique structure And chemical properties, succinic acid has a wide range of uses in many fields, and can be used to synthesize degradable plastics, tranquilizers in the pharmaceutical field, food additives in the food industry, surfactants and others. In addition to the exploration of fermentation technology (US7455997, CN101389752, US6596921) and strain selection (CN101531972), the separation and purification of succinic acid is also an important research content fo...

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Problems solved by technology

The separation and purification methods of succinic acid reported in current patents and documents mainly include calcium salt method (CN101643400, US5143834), liquid-liquid extraction method (US5773653), adsorption method (CN101348428, CN101348429, CN101811953A), electrodialysis method (CN101486637A), Membrane separation (CN101748161A) and other methods, wherein the widely used decolorizing agent is wood activated carbon, which is divided into powder activated carbon and granular activated carbon. Although granular activated carbon has a good decolorization effect and can be regenerated, the price of about 150,000 yuan per ton is too expensive

There are many disadvantages in the use of powdered activated carbon, such as rapid failure (<5 months), non-reusable, dust in the use process, resulting in difficulties in post-processing, and the increase in conductivity of the fermentation broth after passing through the activated carbon, which affects the follow-up unit operation

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