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1. (WO1998051730) PURIFICATION OF POLYPHOSPHAZENE POLYACIDS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1998/051730    International Application No.:    PCT/US1998/009323
Publication Date: 19.11.1998 International Filing Date: 07.05.1998
Chapter 2 Demand Filed:    07.12.1998    
IPC:
C08G 79/02 (2006.01)
Applicants: AVANT IMMUNOTHERAPEUTICS, INC. [US/US]; 119 Fourth Avenue, Needham, MA 02494-2725 (US)
Inventors: ANDRIANOV, Alexander K.; (US).
LeGOLVAN, Mark, P.; (US).
SVIRKIN, Yuri; (US).
SULE, Sameer, S.; (US)
Agent: LILLIE, Raymond, J.; Carella, Byrne, Bain, Gilfillan, Cecchi, Stewart & Olstein, 6 Becker Farm Road, Roseland, NJ 07068 (US)
Priority Data:
08/856,073 14.05.1997 US
Title (EN) PURIFICATION OF POLYPHOSPHAZENE POLYACIDS
(FR) PURIFICATION DES POLYACIDES DE POLYPHOSPHAZENE
Abstract: front page image
(EN)A method for purification of a polyphosphazene polyacid or acid salt thereof in which a polyphosphazene polyacid or acid salt thereof is dissolved in a concentrated aqueous solution of a salt of monovalent ions. The resulting aqueous solution of the polyphosphazene polyacid or acid salt thereof and the at least one salt of monovalent ions then is diluted to reduce the concentration of the at least one salt of monovalent ions, whereby the polyphosphazene polyacid or acid salt thereof is precipitated. The precipitated polyphosphazene polyacid or acid salt thereof then is recovered.
(FR)La présente invention se rapporte à un procédé de purification d'un polyacide de polyphosphazène, ou d'un sel acide de celui-ci, dans lequel un polyacide de polyphosphazène, ou un sel acide de celui-ci, est dissous dans une solution aqueuse concentrée d'un sel d'ions monovalents. La solution aqueuse résultante du polyacide de polyphosphazène, ou du sel acide de celui-ci, et dudit sel d'ions monovalents est ensuite diluée pour réduire la concentration dudit sel d'ions monovalents, le polyacide de polyphosphazène ou le sel acide de celui-ci étant précipité. Le polyacide de polyphosphazène ou le sel acide de celui-ci est alors récupéré.
Designated States: AL, AM, AT, AU, AZ, BB, BG, BR, BY, CA, CH, CN, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IL, IS, JP, KE, KG, KP, KR, KZ, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, TJ, TM, TR, TT, UA, UG, UZ, VN.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)