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1. (WO2007017898) A PROCESS OF RECOVERY OF PT/C CATALYST IN THE PREPARATION OF AZITHROMYCIN DIHYDRATE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2007/017898    International Application No.:    PCT/IN2006/000178
Publication Date: 15.02.2007 International Filing Date: 24.05.2006
IPC:
B01J 23/90 (2006.01), B01J 23/42 (2006.01), C07H 17/00 (2006.01)
Applicants: KOPRAN RESEARCH LABORATORIES LTD. [IN/IN]; Parijat House, 1076 Dr E Moses Road, Worli, Mumbai 400 018 (IN) (For All Designated States Except US).
GUPTE, Rajan, Vitthal [IN/IN]; (IN) (For US Only).
HIRE, Chandrabhan, Madhav [IN/IN]; (IN) (For US Only).
SABADE, Kishore, Balaji [IN/IN]; (IN) (For US Only).
ACHARYA, Rakesh [IN/IN]; (IN) (For US Only).
MHAMUNKAR, Deepak, Bhaurao [IN/IN]; (IN) (For US Only).
BHAU, Jadhav, Santosh [IN/IN]; (IN) (For US Only)
Inventors: GUPTE, Rajan, Vitthal; (IN).
HIRE, Chandrabhan, Madhav; (IN).
SABADE, Kishore, Balaji; (IN).
ACHARYA, Rakesh; (IN).
MHAMUNKAR, Deepak, Bhaurao; (IN).
BHAU, Jadhav, Santosh; (IN)
Agent: MADAN, Jose, A.; Khaitan & Co., Meher Chambers, 4th & 5th Floors, R K Marg, Ballard Estate, Mumbai 400 038 (IN)
Priority Data:
626/MUM/2005 24.05.2005 IN
Title (EN) A PROCESS OF RECOVERY OF PT/C CATALYST IN THE PREPARATION OF AZITHROMYCIN DIHYDRATE
(FR) PROCEDE DE RECUPERATION D'UN CATALYSEUR PT/C DANS LA PREPARATION DE DIHYDRATE D'AZITHROMYCINE
Abstract: front page image
(EN)A process of recovery of Pt/C catalyst from the hydrogenation of 6,9-Imino ether is carried out by isolating spent Pt/C by filtration, reactivating the wet spent Pt/C catalyst by treating the spent Pt/C with strong acid like perchloric acid and recycling the reactivated catalyst along with fresh catalyst in the weight ratio of 98:2 in next cycle of hydrogenation of 6,9-Imino ether. The regenerated catalyst and its use in the hydrogenation of 6,9-Imino ether for atleast ten cycles are also disclosed herein.
(FR)L'invention concerne un procédé de récupération d'un catalyseur Pt/C à partir de l'hydrogénation de 6,9-iminoéther consistant à isoler un catalyseur Pt/C usé par filtration, à réactiver le catalyseur Pt/C usé humide par traitement du catalyseur Pt/C usé avec un acide fort tel que l'acide perchlorique, et à recycler le catalyseur réactivé conjointement avec un catalyseur frais dans un rapport en poids de 98:2 dans le cycle suivant d'hydrogénation de 6,9-iminoéther. L'invention concerne également le catalyseur régénéré et son utilisation dans l'hydrogénation de 6,9-iminoéther pour au moins dix cycles.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, 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, KM, KN, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, 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, IS, IT, LT, LU, LV, MC, NL, PL, 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: English (EN)
Filing Language: English (EN)