| 摘要 |
Olefinic hydrocarbons are isomerized by contacting the olefin with a catalyst obtained by contacting a halogenatable inorganic oxide with an alkali or alkaline earth metal compound so that alkali or alkaline earth metal is retained by the oxide and either before or after said contacting the oxide is contacted with a chlorine containing compound so that chlorine is also retained by the oxide (see Specification 981,691). The catalyst may also contain a minor amount of a metal or metal compound selected from Group VIa and VIII. Isomerizations specified are 4- and/or 2-methylpentene-1 to 2-methylpentene-2, 2- and/or 3-methylbutene-1 to 2-methylbutene-2, and pentene-1 to cis and trans-pentene-2. Temperatures of up to 300 DEG C. may be employed and a carrier gas e.g. nitrogen, may be used. |
