| 摘要 |
In c>3 gas streams, alkynes, alkadienes, and alkenynes are selectively hydrogenated to the corresponding monoenes by liq. -phase hydrogenation (1-3.0 MPa at 5-75≦̸C) over 0.5% Pd/Al2O3 in the presence of stoichiometric or twice-stoichiometric H and <10.0 ppm CO with no alkene isomerization or other side reactions. Thus, a C4 stream containing 48.2% 1-butene and butadiene 5140, butyne 52, and butenyne 12 ppm, was hydrogenated at 21≦̸C and 1.3 MPa in the presence of near-stoichiometric H and 1.8 ppm CO to yield a stream containing 48.4% 1-butene, 2 ppm butadiene, and <1 ppm each butyne and butenyne
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