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Method for continuously discoloring succinic acid fermentation liquor by using activated carbon

A technology of succinic acid and fermentation broth, applied in chemical instruments and methods, separation/purification of carboxylic acid compounds, organic chemistry, etc., can solve the problems of low utilization rate of activated carbon, high labor intensity, equipment corrosion, etc., and achieve easy regeneration. , low labor intensity, and the effect of reducing waste water discharge

Inactive Publication Date: 2012-06-20
NANJING UNIV OF TECH
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for continuous decolorization of succinic acid fermentation liquid by activated carbon, so as to solve the problems of low utilization rate of activated carbon, high labor intensity, small processing capacity, and equipment problems in the decolorization of succinic acid fermentation liquid. Corrosion and slag pollution and other issues

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  • Method for continuously discoloring succinic acid fermentation liquor by using activated carbon

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Embodiment 1

[0029] In this implementation, the particle size of the fruit shell activated carbon particles is 50 mesh; the succinic acid fermentation liquid is processed by ultrafiltration, and the concentration of succinic acid is 48g / L; the pigment content is represented by the light transmittance at 430nm, and pure water is used as a reference , light transmittance 37.2%; pH 6.8. The specific decolorization method is carried out in the following steps.

[0030] (1) Add the granular activated carbon into the NaOH solution with a concentration of 0.5mol / L according to the ratio of 0.4% (w / w), stir at 50°C at a speed of 100 rpm for 40 minutes, then filter, and use the filter to remove water The modified activated carbon was washed with deionized water to pH 7, and 33 g of the modified granular activated carbon was packed into the chromatographic column. The activated carbon bed volume (BV) was 100 mL, and the aspect ratio was 18.

[0031] (2) Heat the succinic acid fermentation broth to ...

Embodiment 2

[0038] In this implementation, the particle size of the shell activated carbon particles is 70 mesh; the succinic acid fermentation liquid is processed by ultrafiltration, and the concentration of succinic acid is 56g / L; the pigment content is represented by the light transmittance at 430nm, and pure water is used as a reference , light transmittance is 56.6%; pH 6.5. The specific decolorization method is carried out in the following steps.

[0039] (1) Add the granular activated carbon into the NaOH solution with a concentration of 0.5mol / L according to the ratio of 0.5% (w / w), stir at 50°C at a speed of 100 rpm for 40 minutes, filter, and use The modified activated carbon was washed to pH 8 with deionized water, and 33 g of the modified granular activated carbon was packed into the chromatographic column. The activated carbon bed volume (BV) was 100 mL, and the aspect ratio was 8.

[0040] (2) Heat the succinic acid fermentation broth to 70°C, put it on the column (single chr...

Embodiment 3

[0047] In this implementation, the particle size of the shell activated carbon is 20 meshes; the succinic acid fermentation broth is treated by ultrafiltration, and the concentration of succinic acid is 74g / L; the pigment content is represented by the light transmittance at 430nm, and pure water is used as a reference , light transmittance 58.5%; pH 6.6. The specific decolorization method is carried out in the following steps.

[0048] (1) Add the granular activated carbon into the NaOH solution with a concentration of 0.3mol / L according to the ratio of 0.4% (w / w), stir at 60°C at a speed of 100 rpm for 50 minutes, then filter, and use the filter to remove water Deionized water washes the modified activated carbon to pH7.5, and the modified granular activated carbon 99g is packed into a chromatographic column, and three activated carbon chromatographic columns (respectively I, II, III) that the ratio of height to diameter is 4.5 are filled respectively. ), the activated carbo...

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Abstract

The invention discloses a method for continuously discoloring succinic acid fermentation liquor by using activated carbon. The method comprises the following steps of: performing modification treatment by using granular activated carbon, continuously removing pigments from the succinic acid fermentation liquor, regenerating by using the activated carbon, recycling the activated carbon, and the like. By the method, the modified granular activated carbon is used for filling a chromatographic column to continuously discolor the succinic acid fermentation liquor; compared with the conventional powder activated carbon intermittent discoloring treatment method, the method has the advantages of recycling the activated carbon for multiple times, along with low labor intensity, high treatment capacity, no waste residues and the like; in addition, the succinic acid fermentation liquor is discolored under the condition that pH is approximate to a neutral value of 6.4 to 7, so that an acidic discoloring solution is prevented from corroding equipment, and a large amount of acidic wastewater is prevented from being discharged in the subsequent evaporation concentration process; and by the method, reduction in separation cost of preparing succinic acid by a fermentation method is facilitated. The method is mainly applied in a pigment removing process of preparing the succinic acid by the fermentation method.

Description

technical field [0001] The invention relates to a method for continuously decolorizing succinic acid fermentation broth by activated carbon, which is suitable for the product extraction and refining process of succinic acid prepared by fermentation. Background technique [0002] Succinic acid is an important binary organic acid, used in food, light industry and pharmaceutical industry, and can be used to prepare basic chemical industries such as 1,4-butanediol, tetrahydrofuran, γ-butyrolactone, N-methylpyrrolidone, etc. The product is also the main raw material of the new fully biodegradable plastic PBS (polybutylene succinate). The market demand has reached 50,000 tons / year, and the potential market has reached 3 million tons / year. At present, succinic acid is mostly produced by chemical method, which mainly uses maleic anhydride as raw material, which comes from non-renewable petroleum resources, and a lot of pollution will also be generated in the production process. The...

Claims

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Application Information

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IPC IPC(8): C07C55/10C07C53/02C07C53/08C07C51/47B01J20/30B01J20/20
Inventor 吴昊姜岷胡俊铎任晓乾洪怡马江锋陈可泉韦萍
Owner NANJING UNIV OF TECH
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