申请人:Linde AG
公开号:EP2287142A1
公开(公告)日:2011-02-23
The present invention relates to a method for preparing linear alpha-olefins (LAO) by oligomerization of ethylene in the presence of a solvent and homogeneous catalyst, comprising the steps of:
(i) feeding ethylene, solvent and catalyst into an oligomerization reactor,
(ii) oligomerizing the ethylene in the reactor,
(iii) removing a reactor outlet stream comprising solvent, linear alpha-olefins, optionally unreacted ethylene and catalyst from the reactor via a reactor outlet piping system,
(iv) dosing at least one additive selected from the group consisting of alcohols, polyethylene glycols, polyethylene glycol monoethers, polyethylene glycol diethers, polyamines, amines, amino alcohols and surfactants,
(v) transferring the reactor outlet stream containing the additive to a catalyst deactivation and removal section, and
(vi) deactivating the catalyst with caustic and removing the deactivated catalyst from the reactor outlet stream,
wherein the residence time of the additive in the reactor outlet stream prior to mixing with caustic is at least 1 second preferably at least 5 seconds, more preferably at least 10 seconds.
本发明涉及一种在溶剂和均相催化剂存在下通过乙烯低聚制备线性α-烯烃(LAO)的方法,包括以下步骤:
(i) 将乙烯、溶剂和催化剂加入低聚反应器、
(ii) 在反应器中使乙烯低聚
(iii) 通过反应器出口管道系统,从反应器中移除包含溶剂、线性α-烯烃、可选未反应乙烯和催化剂的反应器出口液流、
(iv) 加入至少一种添加剂,该添加剂选自由醇、聚乙二醇、聚乙二醇单醚、聚乙二醇二醚、多胺、胺、氨基醇和表面活性剂组成的组、
(v) 将含有添加剂的反应器出口液流转移到催化剂失活和去除段,以及
(vi) 用苛性碱使催化剂失活,并从反应器出口液流中去除失活的催化剂、
其中,在与苛性碱混合之前,添加剂在反应器出口液流中的停留时间至少为 1 秒,优选至少为 5 秒,更优选至少为 10 秒。