| 摘要 |
<p>1494806 Hydrogenating acetylenic impurities DOW CHEMICAL CO 23 July 1975 30836/75 Heading C5E [Also in Division B1] Alpha acetylenes are removed from liquid hydrocarbon streams by contacting the liquid stream containing dissolved hydrogen gas at 10-150‹ C. with a bed of supported catalyst consisting of a mixture of finely divided copper metal and a minor proportion of at least one polyvalent metal selected from Ag, Pt, Pd, Mn, Co, Ni, Cr and Mo supported on a gamma alumina having a surface area of at least 10 m.<SP>2</SP>/g. and containing 0À1-1À5 wt. per cent Na 2 O. The catalyst may be regenerated by flushing with a desorbing gas, e.g. N 2 , and contacting first with an O 2 - containing gas at 200-400‹ C. and then with H 2 at 200-400‹ C. to reduce the oxidized metals. Examples describe the purification of butadiene and of isoprene.</p> |
