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    • 3. 发明授权
    • Process and catalyst for the dehydrohalogenation of halogenated
hydrocarbons or alkylene halohydrins
    • 用于卤代烃或亚烷基卤代醇的脱卤化氢的方法和催化剂
    • US5246903A
    • 1993-09-21
    • US918997
    • 1992-07-23
    • A. Dale Harley
    • A. Dale Harley
    • C07C17/25
    • B01J27/138C07C17/25B01J21/08B01J37/0201
    • An unsaturated halohydrocarbon such as vinylidene chloride is produced by the dehydrohalogenation of haloalkanes such as 1,1,1-trichloroethane or 1,1,2-trichloroethane, by contacting the haloalkane with a Group IA metal halide and a Group IIA or IIB metal oxide or metal hydroxide, together supported on a porous carrier material, under reaction conditions sufficient to form the corresponding unsaturated hydrocarbon and a Group IIA or IIB metal halide. The Group IIA or IIB metal oxide or metal hydroxide may be regenerated by contacting the Group IIA or IIB metal halide with an alkanol or water. In one embodiment, the process is initiated by contacting a novel catalyst comprising a Group IA metal cation such as Cs, a Group IIA or IIB metal cation such as Mg and a neutralizing number of halide anions such as chloride distributed on a support such as silica, with water or an alkanol under reaction conditions sufficient to form the Group IA metal halide and the Group IIA or IIB metal oxide or metal hydroxide supported on a porous carrier material. The process of the invention is also useful for the dehydrohalogenation of alkylene halohydrins to produce alkylene oxides. The process of the invention may be carried out in a riser reactor system, whereby the reactants are cycled in a continuous process.
    • 通过使卤代烷与IAA金属卤化物和IIA或IIB族金属氧化物接触,通过卤代烷烃如1,1,1-三氯乙烷或1,1,2-三氯乙烷的脱卤化氢来制备不饱和卤代烃 或金属氢氧化物,一起负载在多孔载体材料上,在足以形成相应的不饱和烃和IIA或IIB族金属卤化物的反应条件下。 IIA族或IIB族金属氧化物或金属氢氧化物可以通过IIA或IIB族金属卤化物与链烷醇或水接触来再生。 在一个实施方案中,通过使包含诸如Cs的第IA族金属阳离子如Mg,IIA族或IIB族金属阳离子如Mg的中和数量的卤化物阴离子(例如分布在载体上的氯化物如二氧化硅) 在足以形成IA族金属卤化物的反应条件下的水或链烷醇,以及负载在多孔载体材料上的IIA或IIB族金属氧化物或金属氢氧化物。 本发明的方法也可用于亚烷基卤代醇的脱卤化氢以产生环氧烷烃。 本发明的方法可以在提升管反应器系统中进行,由此反应物以连续方式循环。