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Method for purifying itaconic acid fermentation liquor or extracting itaconic acid from itaconic acid mother liquid by film device

A technology of itaconic acid mother and itaconic acid, which is applied in the field of membrane separation technology and itaconic acid preparation, can solve the problems of pollution, waste of resources and the environment, reduce production costs, avoid secondary pollution, and increase the total yield of extraction Effect

Inactive Publication Date: 2007-12-12
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the more this is the case, if the secondary mother liquor cannot be effectively treated, the waste of resources and environmental pollution will be more serious

Method used

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  • Method for purifying itaconic acid fermentation liquor or extracting itaconic acid from itaconic acid mother liquid by film device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Get the mother liquor 250L that contains itaconic acid 171.6 g / L, adopt the nanofiltration membrane that average molecular weight cut-off (10,000 Daltons) is 200 and 500 to process it respectively, when residual liquid is 30L (concentration factor is 8.33), Continuously add tap water to maintain the volume of the residual liquid at about 30L. During the operation, the temperature is controlled at 35-45°C. Finally, the filtrate is concentrated, crystallized, decolorized, and recrystallized. The results are as follows:

[0027]

Test batch number

Membrane average molecular weight cut off

(Wandalton)

Water volume (L)

Membrane filtration yield

total yield

1

200

50

96.4％

92.1％

2

200

75

97.8％

93.4％

3

500

50

97.3％

92.5％

4

500

75

98.5％

93.8％

[0028] Note: Membrane filtration yie...

Embodiment 2

[0031] Get 250L of fermented liquid that contains itaconic acid 73.2g / L, adopt the nanofiltration membrane that average molecular weight cut-off (10,000 Daltons) is 200 and 500 to process it respectively, when residual liquid is 15L, add deionized water continuously (or ordinary industrial water) to maintain the volume of the residual liquid at about 15L, control the temperature at 35-45°C during the operation, and finally concentrate the filtrate for crystallization, decolorization, and recrystallization. The results are as follows:

[0032]

Embodiment 3

[0034] Get the fermented liquid that contains itaconic acid 80g / L, after filtering to remove bacteria, adopt the ultrafiltration membrane that average molecular weight cut-off (10,000 Daltons) is 2000 and 3000 to process it respectively, when residual liquid is 20L (concentration times When it is 12.5), add deionized water (or common industrial water) continuously to maintain the volume of the residual liquid at about 20L. During the operation, the temperature is controlled at 35-45°C. Finally, the filtrate is concentrated, crystallized, decolorized, and recrystallized. The result is as follows:

[0035]

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Abstract

The invention relates to a method of purifying itaconic acid fermentation liquor by using membrane device or extracting itaconic acid from itaconic acid mother liquid, belonging to membrane separation technique and itaconic acid prepartion technique. The invention employs nanometer filtering membrane, ultra- filtering membrane or micr0- filteting membrane to purify itaconic acid fermentation liquor or extract itaconic acid from itaconic acid mother liquid. It is characterized by high production, good quality, low operation cost, simple and high- efficient operation and suitability for industrail production.

Description

technical field [0001] The invention relates to a method for purifying itaconic acid fermentation broth or extracting itaconic acid from itaconic acid mother liquor by using membrane equipment. The invention relates to a method for separating, purifying and extracting itaconic acid fermentation broth and mother liquor by using membrane equipment. The invention belongs to the field of membrane separation technology and itaconic acid preparation technology. Background technique [0002] The scientific name of itaconic acid is methylene succinic acid, or methylene succinic acid, which is an unsaturated dibasic organic acid. Its structural formula is shown below. [0003] [0004] The molecule of itaconic acid contains two active carboxyl groups and a double bond. The double bond and carboxyl group are in a conjugated relationship, which makes itaconic acid very active and capable of various addition reactions, esterification reactions and polymerization reactions. It is an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C57/13C07C51/43C12P7/44
Inventor 蔡宇杰丁彦蕊张大兵
Owner JIANGNAN UNIV
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