Patent ID: 8859834

Claim:
A process, comprising: selectively hydrogenating an unbranched, multiply unsaturated C 4 -hydrocarbon and a branched, multiply unsaturated C 5 -hydrocarbon in a hydrocarbon mixture with addition of hydrogen and carbon monoxide in the presence of a heterogeneous hydrogenation catalyst in a hydrogenation reactor, wherein a ratio of the volume of a feed stream comprising the hydrocarbon mixture, hydrogen, and carbon monoxide into the hydrogenation reactor to the volume of the hydrogenation catalyst per hour of residence time is from 10 to 25 l/h, wherein a temperature at which the feed stream enters the hydrogenation reactor is from 30 to 60° C., and wherein a content of carbon monoxide in the feed stream is from 0.5 to 5 ppm, based on the mass of the hydrocarbon mixture.