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1. (WO2004029266) METHOD OF PURIFYING 3-HYDROXYALKANOIC ACID COPOLYMER
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2004/029266    International Application No.:    PCT/JP2003/012486
Publication Date: 08.04.2004 International Filing Date: 30.09.2003
Chapter 2 Demand Filed:    05.04.2004    
IPC:
C08G 63/06 (2006.01), C08G 63/90 (2006.01), C12P 7/62 (2006.01)
Applicants: KANEKA CORPORATION [JP/JP]; 2-4, Nakanoshima 3-chome, Kita-ku, Osaka-shi, Osaka 530-8288 (JP) (For All Designated States Except US).
OGAWA, Noriko [JP/JP]; (JP) (For US Only).
MIYAMOTO, Kenji [JP/JP]; (JP) (For US Only).
OSAKADA, Fumio [JP/JP]; (JP) (For US Only).
MATSUMOTO, Keiji [JP/JP]; (JP) (For US Only)
Inventors: OGAWA, Noriko; (JP).
MIYAMOTO, Kenji; (JP).
OSAKADA, Fumio; (JP).
MATSUMOTO, Keiji; (JP)
Agent: YASUTOMI, Yasuo; Chuo BLDG., 4-20, Nishinakajima 5-chome, Yodogawa-ku, Osaka-shi, Osaka 532-0011 (JP)
Priority Data:
2002-285863 30.09.2002 JP
Title (EN) METHOD OF PURIFYING 3-HYDROXYALKANOIC ACID COPOLYMER
(FR) METHODE DE PURIFICATION D'UN COPOLYMERE D'ACIDE 3-HYDROXYALCANOIQUE
(JA) 3−ヒドロキシアルカン酸共重合体の精製方法
Abstract: front page image
(EN)It is intended to provide a method of purifying PHA, which is separated from PHA-containing microbial cells, at a high purity without causing a considerable decrease in its molecular weight. Namely, a method of purifying a 3-hydroxyalkanoic acid copolymer produced by a microorganism wherein a treatment with hydrogen peroxide is carried out while continuously or intermittently adding an alkali to an aqueous suspension containing the 3-hydroxyalkanoic acid copolymer separated from the microorganism to thereby control the pH value of the aqueous suspension.
(FR)L'invention concerne un procédé permettant de purifier PHA, séparé de cellules microbiennes contenant PHA, à une pureté élevée sans diminuer considérablement son poids moléculaire. L'invention concerne essentiellement une méthode permettant de purifier un copolymère d'acide 3-hydroxyalcanoïque produit au moyen d'un micro-organisme. On effectue un traitement à l'aide de peroxyde d'hydrogène tout en ajoutant, de manière continue ou intermittente, un alcali à une suspension aqueuse contenant le copolymère d'acide 3-hydroxyalcanoïque séparé du micro-organisme afin de réguler la valeur du pH de la suspension aqueuse.
(JA) 本発明は、PHA含有菌体から分離されるPHAを、著しい分子量の低下を引き起こすことなく高純度で精製する方法を提供すること。 微生物が産生した3−ヒドロキシアルカン酸共重合体を精製する方法であって、微生物から分離した3−ヒドロキシアルカン酸共重合体を含む水性懸濁液にアルカリを連続的又は断続的に添加することによって、前記水性懸濁液のpHをコントロールしながら過酸化水素による処理を行うことからなる精製方法である。
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)