IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0225358
(2005-09-13)
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발명자
/ 주소 |
- Narasimhan,Karunakaran
- Noda,Isao
- Satkowski,Michael Matthew
- Cearley,Angella Christine
- Gibson,Michael Steven
- Welling,Stanley James
|
출원인 / 주소 |
- The Procter &
- Gamble Company
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
8 |
초록
▼
The invention relates to processes for extracting polyhydroxyalkanoate from a biomass, comprising admixing the biomass with an organic solvent for from 1 second to 15 minutes at a first temperature of from 5째 C. below the melting point of the polyhydroxyalkanoate to 10째 C. above the melting point of
The invention relates to processes for extracting polyhydroxyalkanoate from a biomass, comprising admixing the biomass with an organic solvent for from 1 second to 15 minutes at a first temperature of from 5째 C. below the melting point of the polyhydroxyalkanoate to 10째 C. above the melting point of the polyhydroxyalkanoate and at a pressure of from 1 bar to 10 bar to provide a composition comprising the organic solvent and polyhydroxyalkanoate.
대표청구항
▼
What is claimed is: 1. A process for extracting polyhydroxyalkanoate from a biomass, comprising: admixing the biomass with an organic solvent for from about 1 second to about 15 minutes at a temperature of from about 5째 C. below the melting point of the polyhydroxyalkanoate to about 10째 C. above th
What is claimed is: 1. A process for extracting polyhydroxyalkanoate from a biomass, comprising: admixing the biomass with an organic solvent for from about 1 second to about 15 minutes at a temperature of from about 5째 C. below the melting point of the polyhydroxyalkanoate to about 10째 C. above the melting point of the polyhydroxyalkanoate and at a pressure of from about 1 bar to about 10 bar to provide a composition comprising the organic solvent and polyhydroxyalkanoate. 2. The process of claim 1, further comprising maintaining the composition within a temperature range, which is from ambient temperature to the melting point of the polyhydroxyalkanoate. 3. The process of claim 2, further comprising admixing the composition with additional organic solvent. 4. The process of claim 2, wherein the maintaining occurs for from 5 to 120 minutes. 5. The process of claim 2, wherein the temperature range is from 80째 C. to 130째 C. 6. The process of claim 2, further comprising separating the polyhydroxyalkanoate from the organic solvent subsequent to the maintaining. 7. The process of claim 6, wherein the separating comprises precipitating the polyhydroxyalkanoate from the organic solvent to form precipitated polyhydroxyalkanoate. 8. The process of claim 7, further comprising isolating the precipitated polyhydroxyalkanoate. 9. The process of claim 1, wherein the organic solvent is an alcohol, a C3-C7 ketone, or a combination thereof. 10. The process of claim 1, wherein the organic solvent is methanol, ethanol, propanol, butanol, pentanol, acetone, methyl ethyl ketone, or a combination thereof. 11. The process of claim 1, wherein the solvent is toluene, ethyl acetate, tetrahydrofuran, acetonitrile, glyme, methyl ester, sulfolane, DMSO, or a combination thereof. 12. The process of claim 1, wherein the organic solvent is substantially anhydrous. 13. The process of claim 1, wherein the ratio of organic solvent to polyhydroxyalkanoate is from 5 to 100 parts organic solvent to one part polyhydroxyalkanoate by weight. 14. The process of claim 1, wherein the ratio of organic solvent to polyhydroxyalkanoate is from 15 parts organic solvent to one part polyhydroxyalkanoate by weight. 15. The process of claim 1, wherein the first temperature is from 2째 C. to 5째 C. above the melting point of the polyhydroxyalkanoate. 16. The process of claim 1, wherein the admixing occurs for from 5 to 15 minutes. 17. The process of claim 2, wherein the temperature range is from 80째 C. to 100째 C. 18. The process of claim 1, wherein the process is a continuous process. 19. The process of claim 2, further comprising mixing the organic solvent while maintaining it within the temperature range. 20. The process of claim 19, where the mixing is achieved using a propeller, turbine, screw conveyor, or a combination thereof. 21. The process of claim 2, wherein the maintaining occurs for 60 minutes. 22. The process of claim 6, wherein the separating comprises filtering, centrifuging, or a combination thereof. 23. The process of claim 6, wherein the separating occurs at a temperature, which is from 50째 C. to 70째 C. 24. The process of claim 7, wherein the precipitating comprises cooling, flashing, or a combination thereof. 25. The process of claim 7, wherein the precipitating is achieved by admixing the organic solvent with water or an organic solvent in which polyhydroxyalkanoate is substantially insoluble at a temperature below 50째 C. 26. The process of claim 25, wherein the admixing occurs using a propeller, turbine, high shear, layers of water coated sheets, moving belts, or a combination thereof. 27. The process of claim 1, wherein the polyhydroxybutyrate is a hydroxybutyrate-hydroxyhexanoate copolymer with a molecular weight of from 100,000 to 1,500,000. 28. The process of claim 1, further comprising: a) maintaining the organic solvent for from 5 to 120 minutes at a temperature of from 80째 C. to 100째 C.; b) separating the polyhydroxyalkanoate from the organic solvent; and c) isolating the polyhydroxyalkanoate; wherein the polyhydroxyalkanoate has a first repeat unit having the structure: and a second repeat unit having the structure: wherein each R is independently a C3 to C19 alkylene group; and wherein the polyhydroxyalkanoate has from 75 mol % to 99 mol % of the first repeat unit and from 1 mol % to 25 mol % of the second repeat unit. 29. The process of claim 1 or claim 28, wherein the polyhydroxyalkanoate is a poly(3-hydroxyalkanoate).
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