| 摘要 |
<p>The present invention provides for an improved process wherein an olefin, an alcohol, or an ester, halide or ether derivative of said alcohol is reacted with carbon monoxide in a liquid phase in the presence of a catalyst system that contains (a) a rhodium component, and (b) an iodine or bromine component. By passing at least a portion of the liquid reaction mass from the reaction zone to a separation zone of substantially lower CO partial pressure, at least a portion of the carbonylation products, as well as unreacted carbon monoxide, inert gases, and unreacted olefin, alcohol, or alcohol derivatives are vaporized and can be withdrawn from the separation zone. Precipitation of the rhodium catalyst under carbon monoxide deficient conditions is prevented or retarded by addition to the system of a stabilizer component selected from (1) N,N,N min ,N min - tetramethyl-o-phenylenediamine and 2,3 min dipyridyl, (2) a substituted diphosphine having the formula <CHEM> wherein R1, R2, R4 and R5 are alkyl or aryl substituted alkyl having 1 to 20 carbon atoms or in which R1, R2, R4 and R5 are aryl or alkyl substituted aryl radicals having 6 to 20 carbon atoms; and R3 is a polymethylene group having 1-3 atoms, (3) a dibasic or polybasic carboxylic acid having the formula <CHEM> r</p> |
