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METHOD FOR PRODUCING POLYLACTIC ACID, APPARATUS FOR PRODUCING POLYLACTIC ACID, METHOD FOR PRODUCING BIODEGRADABLE PLASTIC AND APPARATUS FOR PRODUCING BIODEGRADABLE PLASTIC
METHOD FOR PRODUCING POLYLACTIC ACID, APPARATUS FOR PRODUCING POLYLACTIC ACID, METHOD FOR PRODUCING BIODEGRADABLE PLASTIC AND APPARATUS FOR PRODUCING BIODEGRADABLE PLASTIC
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机译:聚乳酸的制造方法,聚乳酸的制造装置,生物降解性塑料的制造方法以及生物降解性塑料的制造装置
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摘要
PROBLEM TO BE SOLVED: To provide a method for producing a polylactic acid having uniform quality in a shortened production time, an apparatus for producing the polylactic acid, a method for producing a biodegradable plastic and an apparatus for producing the biodegradable plastic.;SOLUTION: A vegetable-based raw material is sealed in a primary fermentation tank 12 to perform lactic acid fermentation. The fermentation product fermented in the primary fermentation tank 12 is separated into a liquid part and a solid part by a first separation means 13. The liquid part of the fermentation product separated by the first separation means 13 is sealed in a secondary fermentation tank 15 to perform re-fermentation. A re-fermented product prepared from the secondary fermentation tank 15 is separated by a second separation means 16 into a liquid part and a solid part. A dehumidifying means 17 evaporates water from the liquid part of the re-fermented product separated by the second separation means 16 to extract lactic acid. The lactic acid extracted by the dehumidifying means 17 is heated and polymerized by a polymerizing means 18, to prepare the polylactic acid 2.;COPYRIGHT: (C)2010,JPO&INPIT
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