| 摘要 |
1,143,981. Selective hydrogenation. COMPAGNIE FRANCAISE DE RAFFINAGE. 14 Feb., 1967 [18 Feb., 1966; 6 Jan., 1967; 31 Jan., 1967], No. 6997/67. Heading C5E. [Also in Division B1] Acetylenic and di-olefinic compounds contained in hydrocarbon mixtures are selectively hydrogenated in the presence of a catalyst comprising an alumina support impregnated with a solution of Cu, Zn, Cr, Fe, Ca, Cd, Co or Ni or any. combination such that the solution contains 3-50 millimoles of metal per litre, at a temperature of not more than 40‹ C. until there is from 0À002 to 0À2 mg./m.<SP>2</SP> of metal deposited on the support after which it is dried at 95- 650‹ C. and calcined at a temperature ranging from the decomposition temperature of the metallic compound(s) to 825‹ C. Examples illustrate (1) selective hydrogenation of 3000 p.p.m. acetylene in a nitrogen/hydrogen/ethylene mixture, (2) selective hydrogenation of acetylene, butadiene and propadiene in a multihydrocarbon feed containing predominantly methane, ethylene and propylene. |
