发明名称 |
METHODS OF PHA EXTRACTION AND RECOVERY USING NON-HALOGENATED SOLVENTS |
摘要 |
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 invention are poly (hydroxybutyrate-co-hydroxyvalerate), poly(3-hydroxybutyrate-co-4-hydroxybutyrate), and polymers/copolymers of hydroxyterminated polyhydroxybutyrate. |
申请公布号 |
EP0975788(A1) |
申请公布日期 |
2000.02.02 |
申请号 |
EP19980915565 |
申请日期 |
1998.04.14 |
申请人 |
MONSANTO COMPANY |
发明人 |
KURDIKAR, DEVDATT, L.;STRAUSER, FRED, E.;SOLODAR, A., JOHN;PASTER, MARK, D.;ASRAR, JAWED |
分类号 |
C08G63/06;C08G63/89;C12P7/62 |
主分类号 |
C08G63/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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