Supported catalyst for the preparation of monocarboxylic anhydrides

US4965234A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Gerhard Luft · Mühltal, DE
• Peter Trabold · Darmstadt, DE

Key dates

• Filing date: Mar 3, 1989
• Grant date: Oct 23, 1990
• Expiry date: Mar 3, 2009

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2531/822
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a supported catalyst for the preparation of monocarboxylic anhydrides by carbonylation of the appropriate esters or ethers, where, in the supported catalyst, an organosilicon compound is bonded, as a polyfunctional coupling agent, on the one hand to a support material and on the other hand to a noble-metal compound from group VIII of the Periodic Table of the Elements, the coupling agent is a chelate-forming organosilicon compound of the general formula ##STR1## where X=Cl, Br or --OR.sup.2 ; PA1 Y=--NR.sub.2.sup.4, a nitrogen-containing aryl radical, --PR.sub.2.sup.4, AsR.sub.2.sup.4, --SR.sup.4 or --SH; PA1 Z=zero, arylene or phenylene (optionally ortho-, meta- or para-substituted), PA1 R.sup.1 =C.sub.1 to C.sub.5 -alkyl; PA1 R.sup.2 =C.sub.1 to C.sub.5 -alkyl or --C.sub.6 H.sub.5 ; PA1 R.sup.3 =--H or C.sub.1 to C.sub.3 -alkyl; PA1 R.sup.4 =C.sub.1 to C.sub.6 -alkyl, C.sub.5 or C.sub.6 -cycloalkyl or --C.sub.6 H.sub.5 or --CH.sub.2 C.sub.6 H.sub.5, which are optionally substituted by halogen, methoxy, ethoxy or C.sub.1 to C.sub.3 -alkyl groups; PA1 n=0 or 1 or 2; PA1 m=2 to 6, preferably 2 to 4.