Title:
METHOD FOR PRODUCING POLYLACTIC ACID, APPARATUS FOR PRODUCING POLYLACTIC ACID, METHOD FOR PRODUCING BIODEGRADABLE PLASTIC AND APPARATUS FOR PRODUCING BIODEGRADABLE PLASTIC
Document Type and Number:
WIPO Patent Application WO/2010/055874
Kind Code:
A1
Abstract:
A method for producing a polylactic acid, by which polylactic acids of uniform quality can be obtained in a shortened production time; an apparatus for producing a polylactic acid; a method for producing a biodegradable plastic; and an apparatus for producing a biodegradable plastic.
A plant-based raw material is hermetically sealed in a primary fermentation tank (12), and lactic-acid-fermented therein. The fermentation product fermented in the primary fermentation tank (12) is separated into a liquid fraction and a solid fraction by a first separating means (13). The liquid fraction of the fermentation product separated by the first separating means (13) is hermetically sealed in a secondary fermentation tank (15), and re-fermented therein. The re-fermentation product re-fermented in the secondary fermentation tank (15) is separated into a liquid fraction and a solid fraction by a second separating means (16). A lactic acid is extracted by a dehumidifying means (17) by evaporating water from the liquid fraction of the re-fermentation product separated by the second separating means (16). A polylactic acid (2) is obtained by a polymerizing means (18) by heating and polymerizing the lactic acid extracted by the dehumidifying means (17).
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Inventors:
OMOTO FUJIKO (JP)
KATSUHISA TSUTOMU (JP)
KATSUHISA TSUTOMU (JP)
Application Number:
PCT/JP2009/069253
Publication Date:
May 20, 2010
Filing Date:
November 12, 2009
Export Citation:
Assignee:
OMOTO FUJIKO (JP)
KATSUHISA TSUTOMU (JP)
ROYAL BIO PLA KK (JP)
KATSUHISA TSUTOMU (JP)
ROYAL BIO PLA KK (JP)
International Classes:
C12P7/56; C12M1/00; C12P7/62
Foreign References:
| JP2007215427A | 2007-08-30 | |||
| JP2006101876A | 2006-04-20 | |||
| JP2006262770A | 2006-10-05 | |||
| JP2001258585A | 2001-09-25 | |||
| JPH0767672A | 1995-03-14 |
Attorney, Agent or Firm:
SUDA Atsushi et al. (JP)
Atsushi Suda (JP)
Atsushi Suda (JP)
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