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1. (WO1998031653) PROCESS FOR THE RECOVERY OF POLYCARBOXYLIC ACIDS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1998/031653    International Application No.:    PCT/EP1998/000075
Publication Date: 23.07.1998 International Filing Date: 08.01.1998
Chapter 2 Demand Filed:    22.07.1998    
IPC:
C07C 51/42 (2006.01)
Applicants: LONZA S.P.A. [IT/IT]; Via Vittor Pisani, 31, I-20124 Milano (IT) (For All Designated States Except US).
FUMAGALLI, Carlo [IT/IT]; (IT) (For US Only).
PIROLA, Roberto [IT/IT]; (IT) (For US Only).
ISERNIA, Adriano [IT/IT]; (IT) (For US Only).
CARIMATI, Alberto [IT/IT]; (IT) (For US Only)
Inventors: FUMAGALLI, Carlo; (IT).
PIROLA, Roberto; (IT).
ISERNIA, Adriano; (IT).
CARIMATI, Alberto; (IT)
Agent: WEINHOLD, Peter; Alois-Steinecker-Strasse 22, D-85354 Freising (DE)
Priority Data:
MI97A00095 17.01.1997 IT
Title (EN) PROCESS FOR THE RECOVERY OF POLYCARBOXYLIC ACIDS
(FR) PROCEDE SERVANT A RECUPERER DES ACIDES POLYCARBOXYLIQUES
Abstract: front page image
(EN)Aromatic polycarboxylic acids are recovered from the reaction mixtures resulting from the liquid phase oxidation of polyalkyl aromatics. The reaction mixture is spray-dried to obtain crude solid polycarboxylic acid which in turn is slurried in e.g. water, filtered, and optionally further purified by recrystallization. The process is especially suitable for the recovery of terephthalic and isophthalic acids which are important starting material for the production of polyesters.
(FR)On récupère des acides polycarboxyliques aromatiques depuis des mélanges réactionnels provenant de l'oxydation en phase liquide de composés aromatiques de polyalkyle. On sèche par pulvérisation ce mélange réactionnel afin d'obtenir un acide polycarboxylique cru sous forme solide qu'on transforme en pâte liquide dans, par exemple, de l'eau, qu'on filtre et qu'on purifie éventuellement ensuite par recristallisation. Ce procédé est particulièrement approprié afin de récupérer des acides téréphtaliques et isophtaliques représentant des matériaux de départ importants pour la préparation de polyesters.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZW.
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, 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)