A process for selectively producing 1-butene comprises contacting at least one antifouling agent with at least one aluminum alkyl compound to form at least one antifouling compound in a first step. The antifouling compound may comprise a structure comprising a central aluminum molecule bound to an R1 group, bound to an R2 group, and bound to an R3 group. The process further comprises feeding the antifouling compound, an additional amount of the aluminum alkyl compound, at least one titanate compound, and ethylene into a reactor to dimerize ethylene in a second step. The titanate compound is fed as a stream separated from the streams of the antifouling compound and the additional amount of the aluminum alkyl compound. The molar ratio of the sum of the aluminum alkyl compound to the titanate compound is equal to or higher than 1.5 and equal to or lower than 3.0.
一种选择性生产1-
丁烯的工艺包括在第一步中将至少一种防污剂与至少一种铝烷基化合物接触,形成至少一种防污化合物。防污化合物可能包括一个结构,其中包含一个中心铝分子与一个R1基团结合,与一个R2基团结合,与一个R3基团结合。该工艺进一步包括在第二步将防污化合物、额外量的铝烷基化合物、至少一种
钛酸盐化合物和
乙烯送入反应器以使
乙烯二聚。
钛酸盐化合物作为一种流分离出来,与防污化合物和额外量的铝烷基化合物的流分开。铝烷基化合物总量与
钛酸盐化合物的摩尔比等于或高于1.5且等于或低于3.0。