申请人:De Boer Johannes Maria Eric
公开号:US20070129583A1
公开(公告)日:2007-06-07
A catalyst precursor composition comprising: a) a source of chromium, molybdenum or tungsten; b) a first ligand having the general formula (I);
(R
1
)(R
2
)P—X—P(R
3
)(R
4
) (I)
wherein:
X is a bridging group of the formula —N(R
5
)—, wherein R
5
is selected from hydrogen, a hydrocarbyl group, a substituted hydrocarbyl group, a heterohydrocarbyl group, a substituted heterohydrocarbyl group, a silyl group or derivative thereof;
at least three of R
1
to R
4
are independently selected from optionally substituted aromatic groups, each bearing a polar substituent on at least one of the ortho-positions; and
optionally one of R
1
to R
4
is independently selected from hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl and substituted heterohydrocarbyl groups with the proviso that when the group is aromatic it does not contain a polar substituent at any of the ortho-positions; c) a second ligand having the general formula (II);
(R
1′
)(R
2′
)P—X′—P(R
3′
)(R
4′
) (II)
wherein: X′ is a bridging group as defined for X of the first ligand, component (b), of general formula (I);
at least R
1′
and R
2′
of R
1′
to R
4′
are independently selected from hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl and substituted heterohydrocarbyl groups with the proviso that when the group is aromatic it does not contain a polar substituent at any of the ortho-positions; and optionally none, one or both of R
3′
and R
4′
are independently selected from an optionally substituted aromatic group bearing a polar substituent on at least one of the ortho-positions. The present invention also relates to a catalyst system comprising the catalyst precursor composition of the present invention and additional component; d) a cocatalyst. The present invention further relates to a process for the trimerization and tetramerization of olefinic monomers, particularly the trimerization and tetramerization of ethylene to 1-hexene and 1-octene, wherein the process comprises contacting at least one olefinic monomer with the catalyst system of the present invention.
一种催化剂前体组合物,包括:a) 铬、钼或钨的来源;b) 具有通式(I)的第一配体;其中:X是通式—N(R5)—的桥联基,其中R5选择自氢、烃基、取代烃基、杂原子烃基、取代杂原子烃基、硅基或其衍生物;R1至R4中至少三个独立选择自可选择取代的芳香基,每个基上至少一个邻位有极性取代基;并且可选地,R1至R4中的一个独立选择自烃基、取代烃基、杂原子烃基和取代杂原子烃基,但当该基为芳香基时,其邻位均不含极性取代基;c) 具有通式(II)的第二配体;其中:X′是如第一配体b)中的X定义的桥联基;R1′至R4′中至少R1′和R2′独立选择自烃基、取代烃基、杂原子烃基和取代杂原子烃基,但当该基为芳香基时,其邻位均不含极性取代基;并且可选地,R3′和R4′中的一个或两个独立选择自可选择取代的芳香基,其中至少一个基上至少一个邻位有极性取代基。本发明还涉及包括本发明的催化剂前体组合物和附加组分的催化剂体系;d) 一种共催化剂。本发明还涉及一种用于三聚和四聚烯烃单体的方法,特别是用于乙烯三聚和四聚生成1-己烯和1-辛烯的方法,其中该方法包括将至少一种烯烃单体与本发明的催化剂体系接触。