申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0021490A1
公开(公告)日:1981-01-07
A process for the oligomerization of ethylene in which ethylene is contacted in the liquid phase at elevated pressure with a nickel-containing oligomerization catalyst in the presence of an aliphatic diol solvent, a liquid hydrocarbon phase containing ethylene oligomers, dissolved ethylene, catalyst, diol solvent and a minor amount of diol solvent decomposition products is recovered under pressure from the resulting reaction mixture, residual amounts of catalyst are removed from the said liquid hydrocarbon phase as a sufficiently elevated pressure to maintain ethylene dissolved therein, dissolved ethylene is separated from the liquid hydrocarbon phase by flashing and the liquid hydrocarbon phase is optionally scrubbed with water, characterized in that the liquid hydrocarbon phase at any point after separation from the solvent phase is contacted with aqueous acid having a pH below 5, and a liquid hydrocarbon phase substantailly free of diol solvent decomposition products is recovered therefrom.
一种乙烯低聚工艺,其中乙烯在液相中与一种含镍的低聚催化剂在脂肪族二元醇溶剂存在下在高压下接触,从生成的反应混合物中加压回收含有乙烯低聚物、溶解乙烯、催化剂、二元醇溶剂和少量二元醇溶剂分解产物的液态烃相、在足够高的压力下从所述液态烃相中除去残留的催化剂,以保持乙烯溶解在其中,通过闪蒸将溶解的乙烯从液态烃相中分离出来,液态烃相可选择用水洗涤,其特征在于,在与溶剂相分离后的液态烃相与 pH 值低于 5 的水酸接触,从中回收基本上不含二元醇溶剂分解产物的液态烃相。