EP 1025074 A1 20000809 - RECOVERY AND RECYCLE OF CATALYST COMPONENTS USED IN PALLADIUM-CATALYZED PREPARATION OF ARYLCARBOXYLIC ACIDS
Title (en)
RECOVERY AND RECYCLE OF CATALYST COMPONENTS USED IN PALLADIUM-CATALYZED PREPARATION OF ARYLCARBOXYLIC ACIDS
Title (de)
RÜCKGEWINNUNG UND WIEDERVERWERTUNG VON KALALYSATORBESTANDTEILEN AUS DER PALLADIUM-KATALYSIERTEN HERSTELLUNG VON ARYLCARBONSÄUREN
Title (fr)
RECUPERATION ET RECYCLAGE DE COMPOSANTS CATALYTIQUES UTILISES DANS LA PREPARATION, CATALYSEE PAR PALLADIUM, D'ACIDES ARYLCARBOXYLIQUES
Publication
Application
Priority
- US 9822055 W 19981016
- US 95173697 A 19971016
Abstract (en)
[origin: WO9919289A1] Arylcarboxylic acids, especially polycyclic arylcarboxylic acids, are separated from residual catalyst components by use of a phase separation process. This avoids need for use of reduced pressure distillation with its attendant high investment and operating costs. Also, the phase separation process provides an active organic-soluble catalyst residue for reuse via recycle without need for catalyst regeneration. Thus, arylolefin is reacted with carbonmonoxide and water in the presence of palladium catalyst and organophosphine ligand, to form a reaction mass comprising (a) arylcarboxylic acid, and (b) residual catalyst species. The reaction mass is treated with aqueous inorganic base to form (i) an aqueous phase containing dissolved water-soluble salt of the arylcarboxylic acid, and (ii) an organic phase containing dissolved residual catalyst species. The phases are separated, and at least a portion of separated phase (ii) is recycled for use in performing additional reaction. Oftentimes in addition to phases (i) and (ii), a solids phase containing a portion of the palladium catalyst values exists, and preferably, these solids are recovered (e.g., by filtration) and if not sufficiently catalytically active for recycle, at least a portion is converted into an active palladium catalyst component for use in subsequent reaction. The phase separation thus enables separation of catalyst residues in organic solution form and as solids, while concurrently isolating the desired product in water solution form.
IPC 1-7
IPC 8 full level
C07B 61/00 (2006.01); C07C 41/30 (2006.01); C07C 43/215 (2006.01); C07C 51/14 (2006.01); C07C 59/64 (2006.01)
CPC (source: EP)
C07C 51/14 (2013.01); Y02P 20/584 (2015.11)
Citation (search report)
See references of WO 9919289A1
Designated contracting state (EPC)
BE CH DE ES FR GB IT LI
DOCDB simple family (publication)
WO 9919289 A1 19990422; CA 2306425 A1 19990422; EP 1025074 A1 20000809; JP 2001519409 A 20011023
DOCDB simple family (application)
US 9822055 W 19981016; CA 2306425 A 19981016; EP 98953708 A 19981016; JP 2000515862 A 19981016