| 摘要 |
1,185,886. Alkyl chlorides. FARBWERKE HOECHST A.G. 12 June, 1967 [11 June, 1966], No. 26990/67. Heading C2C. An alkyl chloride is prepared by adding HCl gas to an olefin of the general formula CHR 1 = CHR 2 , wherein R 1 and R 2 are each H or alkyl groups, in the presence of a liquid catalyst consisting of FeCl 3 , ZnCl 2 or BiCl 3 , or a mixture of any two or more, and of water, the molar ratio of metal salt to water being at least 1 : 30. Suitable catalysts include the hydrates where x is 2À5, 4 or 6. The most suitable olefins have R 1 and R 2 each of up to 10 C atoms. The olefin and HCl are preferably mixed in a unimolar ratio before being added to the catalyst and may be in admixture with an inert gas such as N 2 , CO, CO 2 , H 2 or a saturated hydrocarbon. In the examples propylene is converted to isopropyl chloride, n-butene-1 to 2-chlorobutane, n-hexene-1 to 2-chlorohexane, n-dodecene-1 to 2-chlorodecane and ethylene to ethyl chloride using various FeCl 3 catalysts. Isopropyl chloride is also prepared using the ZnCl 2 and BiCl 3 catalysts. |
