| 摘要 |
1340445 Reforming hydrocarbons TEXACO DEVELOPMENT CORP 17 March 1972 [18 May 1971] 12576/72 Heading C5E A hydrocarbon conversion process comprises contacting a paraffin hydrocarbon of six or more carbon atoms with hydrogen, a fluorided catalyst of a metal of Group VIIa or VIII on alumina, and water amounting to 3 x 10<SP>-5</SP> to 5 x 10<SP>-4</SP> gram-mole per hour per gram of catalyst. The water may be added as such or formed in situ by the hydrogenation of organic oxygen compounds added to the feed. The alumina of the catalyst may contain silica, thoria-alumina, zirconia-alumina or titania-alumina. The presence of the water reduces or suppresses the cracking activity of the catalyst, but not the isomerization activity, but the effect can be reversed by discontinuing the addition of water. The addition of water may be continuous or intermittent. In Examples 1 and 2, the feed is a mixture of normal hydrocarbons of from 10 to 14 carbon atoms, which are isomerized with little cracking. In Example 3 the feed is similar but contains also toluene; the product contains a corresponding amount of naphthenes. Other feeds referred to range from hexane to residual oils and include slack waxes; the products include oils of high viscosity index. |
