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Method for separation of lactic acid component from lactic acid fermentation liquor, and separation apparatus
Published online: Apr 27, 2009
| Geographical region | USA |
|---|---|
| Subject | Oligo (lactic acid) production |
| Published date | Apr 9, 2009 |
| Title | Method for separation of lactic acid component from lactic acid fermentation liquor, and separation apparatus |
| Patent Application Number | US20090093034 A1 |
| Assignee | Bio-Energy Corp; Osaka University, Japan |
| Relevance | Method and apparatus for separating a lactic acid component from lactic acid fermentation liquor. |
| Type of claims | Publication |
| Overview | This patent discloses a method for producing oligo (lactic acid) from lactic acid fermentation liquor in an apparatus and separating the lactic acid using an apparatus. The lactic acid produced can be used as a starting material for synthesizing compounds such as polylactic acid, polyurethane, or polyol ester. Advantageously, this method is simple to synthesize, at a low cost, and without incorporation of impurities. The method comprises, A) adding the solvent consisting of toluene, xylene, mesitylene, ethylbenzene, and mineral spirit, to a lactic acid fermentation liquor with a pH of 4.8 or less by solvent supply means, B) heating the lactic acid fermentation liquor of step (A) with agitation for azeotropy and then to a temperature ranging from the azeotropic point of the solvent and water to 150° C, whereby the fermentation liquor is dehydrated and a lactic acid component in the fermentation liquor is condensed to produce oligo (lactic acid) with a weight-average molecular weight of less than 5000, C) heating the fermentation liquor of step (B) in a reaction vessel that contains the oligo (lactic acid) with agitation to a temperature ranging from 60° to 150° C to dissolve the oligo (lactic acid) in the heated solvent for extraction, D) stopping the agitation while keeping the heating to separate the solvent in which the oligo (lactic acid) is dissolved from the fermentation liquor and cooling down the separated solvent to near room temperature, F) collecting the oligo (lactic acid) by collecting means from the reaction vessel and decolorizing a liquid by decolorizing means. |
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| Patent Document | Full Patent Document [external link] |
Displaying 3 keywords used to tag this article:
- separation
- fermentation
- lactic acid
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