申请人:SASOL TECHNOLOGY (PROPRIETARY) LIMITED
公开号:US20160083312A1
公开(公告)日:2016-03-24
A process for the oligomerisation, preferably the tetramerisation, of ethylene to predominantly 1-hexene or 1-octene or mixtures of 1-hexene and 1-octene includes contacting ethylene with a catalyst under ethylene oiigomerisation conditions. The catalyst comprises a source of chromium, a diphosphine ligating compound, and optionally an activator. The diphosphine ligating compound includes at least one substituted aromatic ring bonded to a phosphorous atom. The substituted aromatic ring is substituted at a ring atom adjacent to the ring atom bonded to the respective phosphorous atom with a group Y, where Y is of the form —AR
EWG
, A being O, S or NR
5
, where R
5
is a hydrocarbyl, heterohydrocarbyl or organoheteryl group, and R
EWG
is an electron withdrawing group.
一种乙烯低聚化(优选四聚化)的方法,以主要生成1-己烯或1-辛烯或1-己烯和1-辛烯的混合物为目的,包括在乙烯低聚化条件下将乙烯与催化剂接触。该催化剂包括铬源、二膦配合物和可选的活化剂。二膦配合物包括至少一个取代芳香环与磷原子键合。所述取代芳香环在键合至相应磷原子的环原子相邻处用Y基团取代,其中Y的形式为-AREWG,A为O、S或NR5,R5为烃基、杂烃基或有机杂环基,REW G为电子吸引基团。