摘要:
In a process for producing an alcohol by hydroformylation comprises reacting a straight chained, branched or alicyclic mono-olefin having from 3 to 20 carbon atoms with carbon monoxide and hydrogen to form an alcohol having carbon atoms greater in number by one than the carbon atoms of the mono-olefin, the improvement comprises(a) a fist step in which the mono-olefin is hydroformylated with use of a cobalt catalyst in the presence of a gas mixture of carbon monoxide and hydrogen at a high temperature under high pressure to selectively form an aldehyde at a conversion of the mono-olefin being from 50 to 95 mol % while suppressing the formation of an alcohol, and the cobalt catalyst is then removed from the unreacted olefin and the formed aldehyde by decomposition or extraction, and(b) a second step in which the mixture of the unreacted mono-olefin and the formed aldehyde freed from the cobalt catalyst in the first step is reacted with a gas mixture of carbon monoxide and hydrogen with use of a cobalt organophophine complex catalyst at a high temperature under high pressure thereby simultaneously hydroformylating the unreacted mono-olefin and hydrogenating the aldehyde to form the alcohol.
摘要:
An aliphatic, cycloaliphatic or aromatic polyol is incorporated in a catalyst of an organoaluminum halide and a nickel compound. The catalyst is used for a dimerization or codimerization of a lower monoolefin to improve a reaction velocity and a stability in the reaction.
摘要:
In a dimerization of butenes containing isobutene, a formation of 2,2,4-trimethyl pentenes is minimized by using a specific nickel catalyst solution and an organoaluminum catalyst. The specific nickel catalyst is a nickel salt of a fatty acid having 1.5 to 40 wt. % of a free fatty acid and less than 0.1 wt. % of water.The C.sub.8 olefins having less 2,2,4-trimethyl pentenes obtained by the dimerization are quite important to produce excellent plasticizer.