Refining technology for producing long carbon chain dicarboxylic acid by using biological fermentation process

A long carbon chain dibasic acid and bio-fermentation technology, which is applied in the separation/purification of carboxylic acid compounds, organic chemistry, etc., can solve the problems of poor thermal stability, high ash and iron salt content, and low purity, and achieve The effect of expanding development space, high monoacid content, and high thermal stability

Active Publication Date: 2011-03-16
CATHAY R&D CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the technology adopted by long-chain dibasic acid production enterprises can only produce dibasic acid crude products (called P-grade products), but dibasic acid crude products have low monoacid content, poor thermal stability, low purity, ash and iron The salt content is high, and the product quality cannot meet the quality standard of polymer grade, which cannot meet the high-quality requirements of customers, which greatly limits the application range of long-chain dibasic acids

Method used

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  • Refining technology for producing long carbon chain dicarboxylic acid by using biological fermentation process
  • Refining technology for producing long carbon chain dicarboxylic acid by using biological fermentation process
  • Refining technology for producing long carbon chain dicarboxylic acid by using biological fermentation process

Examples

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Embodiment 1

[0017] A refining process for producing long-carbon-chain dibasic acids by biological fermentation. The refining process steps include:

[0018] (1) Decolorization and filtration: put the dibasic acid crude product into the decolorization tank, the water content is 5wt%, add 0.05wt% activated carbon, and the mass ratio of the solvent and the dibasic acid is 3.0: 1 when converted into a content of 100%. At a temperature of 85°C, decolorize for 20 minutes and then filter through a plate and frame filter press to obtain a dibasic acid clear solution. The solvent is 90% acetic acid solution.

[0019] (2) Primary crystallization and separation: Put the dibasic acid clear solution obtained in step (1) into a primary crystallization tank, cool down to 75°C, keep it warm for 1 hour, then cool down to 25°C, after the material is completely crystallized, put the crystallization The material is separated by centrifuge.

[0020] (3) High-temperature water crystallization and separation:...

Embodiment 2

[0023] A refining process for producing long-carbon-chain dibasic acids by biological fermentation. The refining process steps include:

[0024] (1) Color filtration: Put the dibasic acid crude product into the decolorization tank, the water content is 8wt%, add 0.1wt% activated carbon, the mass ratio of the solvent and the dibasic acid is 2.5: 1 when converted into a content of 100%. At a temperature of 90°C, decolorize for 60 minutes and then filter through a plate and frame filter press to obtain dibasic acid clear liquid. The solvent is 99% acetic acid solution.

[0025] (2) Secondary crystallization and separation: Put the dibasic acid clear liquid obtained in step (1) into a primary crystallization tank, cool down to 80°C, keep it warm for 1.5 hours, then cool down to 30°C, after the material is completely crystallized, put the crystallization The material is separated by centrifuge.

[0026] (3) Warm water crystallization and separation: put the crystallization materi...

Embodiment 3

[0030] A refining process for producing long-carbon-chain dibasic acids by biological fermentation. The refining process steps include:

[0031] (1) Decolorization and filtration: put the dibasic acid crude product into the decolorization tank, the water content is 12wt%, add 0.2wt% activated carbon, the mass ratio of the solvent and the dibasic acid converted into a content of 100% is 2.0:1, At a temperature of 100°C, decolorize for 90 minutes and then filter through a plate and frame filter press to obtain dibasic acid clear liquid. The solvent is 95% acetic acid solution.

[0032] (2) Primary crystallization and separation: Put the dibasic acid clear solution obtained in step (1) into a primary crystallization tank, cool down to 85°C, keep it warm for 2 hours, then cool down to 35°C, after the material is completely crystallized, put the crystallization The material is separated by centrifuge.

[0033] (3) High-temperature water crystallization and separation: put the cry...

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Abstract

The invention belongs to the technical field of preparing long carbon chain dicarboxylic acid by using a biological fermentation process, in particular relating to a refining technology for producing long carbon chain dicarboxylic acid by using a biological fermentation process. The technical scheme of the invention is the refining technology for producing long carbon chain dicarboxylic acid by using the biological fermentation process, which comprises the following steps: (1) decoloration and filtering; (2) primary crystallization and separation; (3) crystallization and separation of high-temperature water; and (4) drying. The obtained long carbon chain dicarboxylic acid product has the advantages of high single acid content, good photopermeability and high heat stability, can meet demands from different users, can be used for producing advanced spices, high-performance engineering plastics, high-temperature dielectric medium, advanced hot melt adhesive, cold-resistant plasticizer, advanced lubricating oil, advanced paint and coating and the like, and greatly broaden development space on down-stream products of the long carbon chain dicarboxylic acid.

Description

technical field [0001] The invention belongs to the technical field of preparing long-carbon-chain dibasic acids by biological fermentation, in particular to a refining process for producing long-carbon-chain dibasic acids by biological fermentation. Background technique [0002] Long chain dicarboxylic acids (Long chain dicarboxy acids) refer to aliphatic dicarboxylic acids (DC for short) containing more than 10 carbon atoms in the carbon chain. n ), including saturated and unsaturated dicarboxylic acids, is a class of fine chemical products with important and extensive industrial uses. , high-grade lubricants, high-grade paints and coatings and other important raw materials. [0003] The production methods of long carbon chain dibasic acids include chemical synthesis and bio-fermentation methods. Foreign countries mainly use chemical synthesis methods. This method mainly uses butadiene as raw material and is produced by chemical synthesis methods. The process is complicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/42C07C55/02C07C57/13C07C57/18C07C57/00C07C55/21
Inventor 曹务波王志洲陈远童黄力刘双江傅深展葛明华
Owner CATHAY R&D CENT CO LTD
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