| 摘要 |
1275809 Cyanamide-containing catalysts OLIN CORP 21 Nov 1969 [21 Nov 1968] 57068/ 69 Heading B1E [Also in Division C2] A catalyst system comprises either (a) at least one cyanamide compound of the formula: RR'NCN wherein R and R' may be hydrogen, alkyl, aryl, alkaryl, aralkyl, alkoxyaryl, alkoxy, aryloxy, and (b) at least one noble metal halide or oxide; or a complex of (a) and (b). R and R' are hydrogen, C 1 -C 8 alkyl or alkoxy or C 6 -C 10 aryl, aralkyl, alkaryl, aryloxy or alkoxyaryl. Many particular cyanamides and noble metal halides are specified. Noble metals are ruthenium, rhenium, rhodium, palladium osmium, iridium, platinum, silver and gold. The catalyst system may also contain oxides of iron and metals of groups Va and VIa, those specified being V, Mo, W, Nb, Cr, Ta and Fe. The preferred ratio of cyanamide to noble metal halide is between 0.05 and 10. The catalyst may be self-supported or deposited on a carrier, those carriers specified being alumina, silica, carbon, barium sulphate, calcium carbonate, asbestos, bentonite, diatomaceous earth and fullers earth. The examples describe two-component catalysts of Pd, Rh or Ir chlorides plus a cyanamide. |
