申请人:De Boer Maria Eric Johannes
公开号:US20060235250A1
公开(公告)日:2006-10-19
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 bivalent organic bridging group; R
1
and R
3
are independently selected from, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl and substituted heterohydrocarbyl groups, with the proviso that when R
1
and R
3
are aromatic groups they do not contain a polar substituent at any of the ortho-positions; R
2
and R
4
are independently selected from optionally substituted aromatic groups, each R
2
and R
4
bearing a polar substituent on at least one of the ortho-positions; and 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 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; and R
1′
, R
2′
, R
3′
and R
4′
are independently selected from hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl and substituted heterohydrocarbyl groups of which at least one of R
1′
, R
2′
, R
3′
and R
4′
is substituted with a polar substituent, or R
1′
, R
2′
, R
3′
and R
4′
are independently selected from hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl and substituted heterohydrocarbyl groups, wherein any substituents on one or more of R
1′
, R
2′
, R
3′
and R
4′
are non-polar. The present invention also relates to a catalyst system comprising the catalyst precursor composition of the present invention and a cocatalyst.
一种催化剂前体组合物,包括 a) 铬、钼或钨源; b) 具有通式(I)的第一配体;
(R
1
)(R
2
)P-X-P(R
3
)(R
4
) (I)
其中 X 为二价有机桥基;R
1
和 R
3
独立选自烃基、取代的烃基、杂烃基和取代的杂烃基,但当 R
1
和 R
3
是芳香族基团时,它们在任何一个正交位置上都不含极性取代基;R
2
和 R
4
独立地选自任选取代的芳香基团,每个 R
2
和 R
4
c) 具有通式(II)的第二配体;
(R
1′
)(R
2′
)P-X′-P(R
3′
)(R
4′
) (II)
其中 X′是式-N(R
5′
)-的桥基,其中 R
5′
选自氢、烃基、取代的烃基、杂烃基、取代的杂烃基、硅烷基或其衍生物;以及 R
1′
, R
2′
, R
3′
和 R
4′
独立地选自烃基、取代的烃基、杂烃基和取代的杂烃基,其中 R
1′
, R
2′
, R
3′
和 R
4′
被极性取代基取代,或 R
1′
, R
2′
, R
3′
和 R
4′
独立地选自烃基、取代的烃基、杂烃基和取代的杂烃基,其中一个或多个 R
1′
, R
2′
, R
3′
和 R
4′
为非极性。本发明还涉及一种由本发明的催化剂前体组合物和助催化剂组成的催化剂体系。