IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0992132
(2004-11-19)
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우선권정보 |
JP-2003-392466(2003-11-21); JP-2004-252554(2004-08-31) |
발명자
/ 주소 |
- Kinoshita,Koichi
- Osakada,Fumio
- Ueda,Yasuyoshi
- Narasimhan,Karunakaran
- Cearley,Angella Christine
- Yee,Kenneth
- Noda,Isao
|
출원인 / 주소 |
- Kaneka Corporation
- The Procter &
- Gamble Company
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
4 |
초록
▼
The present invention provides a method for easily obtaining a biodegradable polyhydroxyalkanoate by a solvent extraction method. A method for producing a polyhydroxyalkanoate crystal comprises mixing a solution of a polyhydroxyalkanoate in a good solvent with a poor solvent at 50 to 130째 C. to prec
The present invention provides a method for easily obtaining a biodegradable polyhydroxyalkanoate by a solvent extraction method. A method for producing a polyhydroxyalkanoate crystal comprises mixing a solution of a polyhydroxyalkanoate in a good solvent with a poor solvent at 50 to 130째 C. to precipitate a polyhydroxyalkanoate.
대표청구항
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The invention claimed is: 1. A method for producing a polyhydroxyalkanoate crystal which comprises mixing a solution of a polyhydroxyalkanoate in a good solvent with a poor solvent at 50 to 130째 C. to precipitate a polyhydroxyalkanoate, wherein the polyhydroxyalkanoate is a copolymer composed of 3-
The invention claimed is: 1. A method for producing a polyhydroxyalkanoate crystal which comprises mixing a solution of a polyhydroxyalkanoate in a good solvent with a poor solvent at 50 to 130째 C. to precipitate a polyhydroxyalkanoate, wherein the polyhydroxyalkanoate is a copolymer composed of 3-hydroxyhexanoate and 3-hydroxybutyrate, a mixing temperature of the solution of the polyhydroxyalkanoate in the good solvent with the poor solvent is 85 to 130째 C. when a ratio of the 3-hydroxyhexanoate in the polyhydroxyalkanoate is less than 13 mol %, and a mixing temperature of the solution of the polyhydroxyalkanoate in the good solvent with the poor solvent is 50 to 84째 C. when a ratio of the 3-hydroxyhexanoate in the polyhydroxyalkanoate is not less than 13 mol %. 2. The method for producing a polyhydroxyalkanoate crystal according to claim 1, which further comprises the step of adding the poor solvent to the solution of the polyhydroxyalkanoate in the good solvent. 3. A method for producing a polyhydroxyalkanoate crystal which comprises mixing a solution of a polyhydroxyalkanoate in a good solvent with a poor solvent at 50 to 130째 C. to precipitate a polyhydroxyalkanoate, wherein the good solvent of the polyhydroxyalkanoate is at least one species selected from the group consisting of monohydric alcohols having 4 to 10 carbon atoms, aromatic hydrocarbons having 6 to 10 carbon atoms, ketones having 3 to 7 carbon atoms, and fatty acid alkyl esters having 4 to 8 carbon atoms. 4. The method for producing a polyhydroxyalkanoate crystal according to claim 3, wherein the monohydric alcohol having 4 to 10 carbon atoms is at least one species selected from the group consisting of butanol, pentanol, hexanol, heptanol, octanol, nonanol, decanol, and isomers thereof. 5. The method for producing a polyhydroxyalkanoate crystal according to claim 3, wherein the aromatic hydrocarbons having 6 to 10 carbon atoms is at least one species selected from the group consisting of benzene, toluene, xylene, ethyl benzene, cumene, butyl benzene, cymene, and isomers thereof. 6. The method for producing a polyhydroxyalkanoate crystal according to claim 3, wherein the ketones having 3 to 7 carbon atoms is at least one species selected from the group consisting of acetone, methyl ethyl ketone, methyl butyl ketone, pentanon, hexanon, cyclohexanon, heptanone, and isomers thereof. 7. The method for producing a polyhydroxyalkanoate crystal according to claim 3, wherein the fatty acid alkyl esters having 4 to 8 carbon atoms is at least one species selected from the group consisting of ethyl acetate, propyl acetate, butyl acetate, pentyl acetate, hexyl acetate, and isomers thereof. 8. A method for producing a polyhydroxyalkanoate crystal which comprises mixing a solution of a polyhydroxyalkanoate in a good solvent with a poor solvent at 50 to 130째 C. to precipitate a polyhydroxyalkanoate, wherein the poor solvent is an aliphatic hydrocarbon having 6 to 12 carbon atoms. 9. The method for producing a polyhydroxyalkanoate crystal according to claim 8, wherein the poor solvent is at least one species selected from the group consisting of hexane, heptane, methylcyclohexane, octane, nonane, decane, dodecane, undecane, and isomers thereof. 10. The method for producing a polyhydroxyalkanoate crystal according to claim 1, wherein the weight ratio of the polyhydroxyalkanoate relative to the total amount of the polyhydroxyalkanoate and the good solvent is within the range of 1 to 20% by weight. 11. The method for producing a polyhydroxyalkanoate crystal according to claim 1, wherein the weight ratio of the poor solvent relative to the total amount of the poor solvent and good solvent is 10 to 90% by weight. 12. The method for producing a polyhydroxyalkanoate crystal according to claim 9, wherein the good solvent is toluene and the poor solvent is heptane. 13. A method for producing a polyhydroxyalkanoate crystal which comprises mixing a solution of a polyhydroxyalkanoate in a good solvent with a poor solvent at 50 to 130째 C. to precipitate a polyhydroxyalkanoate, wherein the polyhydroxyalkanoate is produced by at least one microorganism selected from the group consisting of species belonging to the genus Aeromonas, Alcaligenes, Azotobacier, Bacillus, Clostridium, Halobacterium, Norcadia, Rhodospirillum, Psuedomonas, Ralstonia, Zoogloea, Candida, Yarrowia, and Saccharomyces. 14. The method for producing a polyhydroxyalkanoate crystal according to claim 13, wherein the polyhydroxyalkanoate is produced by a transformant obtained by introducing a polyhydroxyalkanoate synthetic gene group derived from Aeromonas caviae. 15. The method for producing a polyhydroxyalkanoate crystal according to claim 14, wherein the transformant obtained by introducing a polyhydroxyalkanoate synthetic gene group derived from Aeromonas caviae is Ralstonia eutropha obtained by introducing a polyhydroxyalkanoate synthetic gene group derived from Aeromonas caviae. 16. A method for producing an extraction residual substance which comprises extracting a polyhydroxyalkanoate from a biomass including a polyhydroxyalkanoate produced by mixing a solution of a polyhydroxyalkanoate in a good solvent with a poor solvent at 50 to 130째 C. to precipitate a polyhydroxyalkanoate, and decreasing solvent content in the extraction residual substance. 17. Animal feed, microorganism feed, or vegetable fertilizer which comprises an extraction residual substance produced by the method of claim 16.
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