Title:
POLYHYDROXYBUTYRATE COPOLYMER PRODUCTION METHOD AND USE THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/091685
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a PHB copolymer with which aggregation of PHB copolymer particles during the production process is inhibited and which has high bulk density. The purpose is also to provide a production method for said copolymer. The aforementioned purpose is achieved by providing a PHB copolymer production method comprising: (a) a step for performing an enzymatic treatment using a specific enzyme on a microorganism containing a PHB copolymer having a composition ratio that is a 3HB unit/a hydroxyalkanoate unit other than a 3HB unit and is in a prescribed range; (b) a step for adding a surfactant after the pH is adjusted to within a prescribed range by adding an alkaline aqueous solution; (c) a step for preparing an aqueous suspension having a pH that is at most 7.0 and having a shear viscosity in a prescribed range; and (d) a step for spray drying.
Inventors:
DEGUCHI NAOKI (JP)
HIROTA SHOGO (JP)
HIRANO MASARU (JP)
HIROTA SHOGO (JP)
HIRANO MASARU (JP)
Application Number:
PCT/JP2021/036049
Publication Date:
May 05, 2022
Filing Date:
September 30, 2021
Export Citation:
Assignee:
KANEKA CORP (JP)
International Classes:
C12P7/62; C07K14/195; C08G63/06; C08G63/78; C08J3/16; C08K5/41; C08L1/00; C08L29/04; C08L67/04; C08L71/02; C12P7/42
Domestic Patent References:
| WO2018070492A1 | 2018-04-19 | |||
| WO2018186278A1 | 2018-10-11 | |||
| WO2021085534A1 | 2021-05-06 |
Foreign References:
| JP2019097518A | 2019-06-24 | |||
| JP2008101196A | 2008-05-01 | |||
| JP2021088662A | 2021-06-10 |
Other References:
TOHATA, HEIICHIRO: "Granulation Handbook", 1 January 1975, OHMSHA, LTD, JP, ISBN: 978-4-2741-1904-0, article TOHATA, HEIICHIRO: "Chapter 6 Spray Granulation Method", pages: 211 - 217, XP009536221
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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