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특허 상세정보

Methods of PHA extraction and recovery using non-halogenated solvents

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) C12P-007/42    C12P-007/62    C12N-001/20    C08G-063/06   
미국특허분류(USC) 435/135 ; 203/014 ; 203/067 ; 210/767 ; 210/768 ; 210/787 ; 435/134 ; 435/146 ; 528/354 ; 528/361 ; 528/491 ; 528/492 ; 528/501
출원번호 US-0060121 (1998-04-14)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Beusen
인용정보 피인용 횟수 : 46  인용 특허 : 9
초록

Polyhydroxyalkanoate (PHA) polyester is extracted from biomass by dissolving the PHA in a non-halogenated solvent which comprises a PHA-good solvent or a mixture thereof. Suitable PHA-good solvents can be selected from the disclosed alcohols, esters, amides and ketones. The PHA can be recovered, for example, by cooling, by solvent evaporation, or by addition of a PHA-poor solvent, wherein the PHA-poor solvent preferably dissolves less than about 1% (w/v) of the PHA at a temperature below the solvent boiling point. Preferred PHA types for use in the inven...

대표
청구항

[ What is claimed is:] [1.] A method of recovering polyhydroxyalkanoate (PHA) from biomass comprising:providing biomass containing PHA;dissolving PHA with a solvent to produce PHA-enriched solvent and residual biomass materials;separating the residual biomass materials from the PHA-enriched solvent; andrecovering PHA polymer from the PHA-enriched solvent, wherein:the PHA is selected from the group consisting of poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV), poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (3HB4HB), and polymers and copolymers of hydroxyter...

이 특허를 인용한 특허 피인용횟수: 46

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