| 摘要 |
1,225,663. Disproportionating olefins. PHILLIPS PETROLEUM CO. 2 April, 1968 [3 April, 1967], No. 15843/68. Heading C5E. Olefins are disproportionated in the presence of a catalyst comprising (1) SiO 2 or ThO 2 promoted with an oxide, or calculable precursor therefor, of Mo, W, Te or Re, or a sulphide of Mo or W; or (2) ZrO 2 or a phosphate of Al, Zr, Ca, Mg or Ti promoted with an oxide, or calcinable precursor thereof, of Mo, W, or Re, a sulphide of Mo or W, Mg 3 (WO 3 ) 2 or beryllium phosphotungstate, such that prior to contact with the olefin, the catalyst is contacted at an elevated temperature with hydrogen chloride or a hydrocarbon chloride decomposable at that temperature to yield HCl. The catalyst may be contacted at 400-1200‹ F. with vinyl chloride, allyl chloride, dichlorethylene, chloropropane or chlorobenzene. In examples (1) propylene and vinyl chloride yield ethylene and butenes, (2) propylene and HCl yield similar products, (3) propylene and chloropropane yield similar products, the catalyst in each case being WO 3 -SiO 2 . |
