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1. (WO2002006200) A PROCESS FOR THE PURIFICATION OF AROMATIC CARBOXYLIC ACIDS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2002/006200    International Application No.:    PCT/EP2001/006751
Publication Date: 24.01.2002 International Filing Date: 13.06.2001
Chapter 2 Demand Filed:    24.01.2002    
IPC:
C07C 51/487 (2006.01)
Applicants: EUROTECNICA DEVELOPMENT & LICENSING S.P.A. [IT/IT]; Corso Buenos Aires, 63 I-20124 Milano (IT) (For All Designated States Except US).
MORO, Antonio [IT/IT]; (IT) (For All Designated States Except US).
CODIGNOLA, Franco [IT/IT]; (IT) (For US Only)
Inventors: CODIGNOLA, Franco; (IT)
Agent: PISTOLESI, Roberto; Dragotti & Associati S.r.l. Galleria San Babila, 4/C I-20122 Milano (IT)
Priority Data:
MI00A001599 14.07.2000 IT
Title (EN) A PROCESS FOR THE PURIFICATION OF AROMATIC CARBOXYLIC ACIDS
(FR) METHODE DE PURIFICATION D'ACIDES CARBOXYLIQUES AROMATIQUES
Abstract: front page image
(EN)A novel process for the purification of crude aromatic carboxylic acids, such as, for example, terephthalic acid, orthophthalic acid, trimesic acid, isophthalic acid, 2,6-napththalenedicarboxylic acid and pyromellitic acid, which are obtained by oxidising the corresponding aromatic precursors is described; the process is based on the subsequent oxidation in heterogeneous phase of the crude product in aqueous solution.
(FR)L'invention concerne une nouvelle méthode de purification d'acides carboxyliques aromatiques, tels que, par exemple, l'acide téréphtalique, l'acide orthophtalique, l'acide trimésique, l'acide isophtalique, l'acide 2,6-napththalènedicarboxylique, et l'acide pyromellitique, qui sont obtenus par oxydation de précurseurs aromatiques correspondants. La méthode est basée sur l'oxydation subséquente, en phase hétérogène, d'un produit brut dans une solution aqueuse.
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, EE, 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, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, 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, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)