SUPPORTED CATALYST FOR THE PREPARATION OF MONOCARBOXYLIC ANHYDRIDES

• Main Authors: TRABOLD, PETER, LUFT, GERHARD
• Format: Patent
• Language: English; French
• Published: 26.07.1994
• Edition: 5
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; APPARATUS THEREFOR; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; GENERAL METHODS OF ORGANIC CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

Supported catalyst for the preparation of monocarboxylic anhydrides of the disclosure 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 a) or b) where X = Cl, Br or -OR2; Y = -NR?, a nitrogen-containing aryl radical, -PR?, AsR?, -SR4 or -SH; Z = zero, arylene or phenylene (optionally ortha-, meta or para-substituted), R1 = C1 to C5-alkyl, R2 = C1 to C5-alkyl or -C6H5; R3 = -H or C1 to C3-alkyl; R4 = C1 to C6-alkyl, C5 or C6-cycloalkyl or -C6H5 or -CH2C6H5, which are optionally substituted by halogen, methoxy, ethoxy or C1 to C3-alkyl groups; n = 0 or 1 or 2; m = 2 to 6, preferably 2 to 4.