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Method for producing organic acid

A manufacturing method and organic acid technology, applied in the preparation of organic compounds, organic chemistry, carboxylate preparation, etc., can solve the problems of polymer property degradation, damage to commodity value, etc.

Inactive Publication Date: 2014-03-19
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the organic acids produced by these methods, in order to remove many impurities derived from biomass resources, it is necessary to combine complex purification processes such as crystallization, membrane separation, and distillation. Causes of coloring of polymers in stages
In addition, the coloring can still be seen in the polymer obtained by using a colored organic acid, which not only damages the commercial value, but also may reduce the physical properties of the polymer due to the influence of a small amount of coloring-causing substances.

Method used

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  • Method for producing organic acid
  • Method for producing organic acid

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Embodiment

[0054] Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to the following examples.

reference example 1

[0055] (Reference Example 1) Yeast strain having L-lactic acid fermentation ability

[0056] As a microorganism for producing L-lactic acid, HI003, which is an L-lactic acid fermenting yeast strain described in Reference Example 1 of WO2009 / 099044, was used.

reference example 2

[0057] (Reference Example 2) Production of L-lactic acid by batch fermentation

[0058] Using the HI003 strain of Reference Example 1, a raw sugar medium (70 g / L "Usaccharin" (manufactured by MUSO Co., Ltd.), 1.5 g / L ammonium sulfate) was used to conduct a batch fermentation test using the following culture conditions and methods. In addition, the culture medium was used after autoclaving (121 degreeC, 15 minutes).

[0059] [Cultivation Conditions]

[0060] Reaction tank capacity (amount of lactic acid fermentation medium): 30 (L), temperature adjustment: 32 (℃), reaction tank ventilation: 0.1 (L / min), reaction tank stirring speed: 200 (rpm), pH adjustment: use 1N calcium hydroxide to adjust to pH 6.5.

[0061] [upbringing method]

[0062] The HI003 strain was shaken overnight in a test tube in 5 ml of a raw sugar medium (pre-culture). The pre-pre-culture solution was inoculated into 100 ml of fresh raw sugar medium, and cultured with shaking in a 500-ml Sakaguchi flask fo...

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Abstract

Any colored impurity contained in an organic acid derived from a biomass resource can be removed by oxidizing the organic acid derived from the biomass resource with an oxidizing agent such as hydrogen peroxide, tert-butylhydroperoxide, ozone, sodium hypochlorite and sodium chlorite.

Description

technical field [0001] The present invention relates to a process for the production of organic acids derived from biomass resources. Background technique [0002] In recent years, the production of polymer raw materials using biomass resources, which are renewable resources, as a raw material has attracted attention due to fears of rapid price increases and depletion of petroleum resources. Among them, the production of organic acids used as raw materials for polyester and the like has attracted increasing attention. Examples of methods for producing organic acids derived from such biomass resources include a method of directly obtaining an organic acid from a biomass-derived compound by chemical synthesis, and a method of obtaining an organic acid from a biomass-derived compound through fermentation and culture of microorganisms. However, for the organic acids produced by these methods, in order to remove many impurities derived from biomass resources, it is necessary to ...

Claims

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Application Information

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IPC IPC(8): C12P7/40C07C51/487C07C59/08C08G63/78
CPCC12P7/40C08G63/78C07C51/50C07C51/487C07C59/08C12P7/46C12P7/56C07C55/10
Inventor 山田哲也伊藤正照山田胜成河村健司
Owner TORAY IND INC
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