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US 8,476,181 B2Granted
Catalyst systems for the oligomerization of olefin monomers
AssigneeShell Oil Company
InventorsEric Johannes Maria De Boer, Harry Van Der Heijden, Quoc An On, Johan Paul Smit, Arie Van Zon
Life of this patent
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Abstract
The present invention relates to catalyst systems and a process for the simultaneous trimerization and tetramerization of olefinic monomers using those ligands.
Claims8
A catalyst system comprising:
- a) a source of chromium, molybdenum or tungsten;
- b) a ligand having the general formula (I):
- (R1)2P—P(R1)m(R2)n═N(R3) (I)
- wherein R3 is selected from hydrogen, a hydrocarbyl group, a substituted hydrocarbyl group, a heterohydrocarbyl group, a substituted heterohydrocarbyl group, a silyl group or derivative thereof;
- the R1 groups are independently selected from an optionally substituted aromatic group bearing a polar substituent on at least one of the ortho-positions;
- and
- the R2 groups 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;
- with the proviso that m is 0 or 1, n is 1 or 2 and the total of m+n is 2;
- and
- c) a cocatalyst.
7 more elements
A catalyst system comprising:
- a) a source of chromium, molybdenum or tungsten;
- b) a ligand having the general formula (II):
- P(R1)m(R2)n—P(R1)2═N(R3) (II)
- wherein R3 is selected from hydrogen, a hydrocarbyl group, a substituted hydrocarbyl group, a heterohydrocarbyl group, a substituted heterohydrocarbyl group, a silyl group or derivative thereof;
- the R1 groups are independently selected from an optionally substituted aromatic group bearing a polar substituent on at least one of the ortho-positions;
- and
- the R2 groups 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;
- with the proviso that m is 0 or 1, n is 1 or 2 and the total of m+n is 2;
- and
- c) a cocatalyst.
7 more elements
A catalyst system comprising:
- a) a source of chromium, molybdenum or tungsten;
- b) a ligand system prepared by reacting:
- a compound of formula (III):
- X—P(R1)m(R2)n (III)
- wherein X is a halide;
- wherein R3 is selected from hydrogen, a hydrocarbyl group, a substituted hydrocarbyl group, a heterohydrocarbyl group, a substituted heterohydrocarbyl group, a silyl group or derivative thereof;
- the R1 groups are independently selected from an optionally substituted aromatic group bearing a polar substituent on at least one of the ortho-positions;
- and
- the R2 groups 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;
- with the proviso that m is 0 or 1, n is 1 or 2 and the total of m+n is 2;
- and
- a compound of formula (IV):
- (R1)2P—N(R3)H (IV)
- in the presence of an HX-acceptor;
- and
- c) a cocatalyst.
13 more elements
A catalyst system comprising:
- a) a source of chromium, molybdenum or tungsten;
- b) a ligand system prepared by reacting:
- a compound of formula (V):
- X—P(R1)2 (V)
- wherein X is a halide;
- wherein R3 is selected from hydrogen, a hydrocarbyl group, a substituted hydrocarbyl group, a heterohydrocarbyl group, a substituted heterohydrocarbyl group, a silyl group or derivative thereof;
- the R1 groups are independently selected from an optionally substituted aromatic group bearing a polar substituent on at least one of the ortho-positions;
- and
- the R2 groups 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;
- with the proviso that m is 0 or 1, n is 1 or 2 and the total of m+n is 2;
- and
- a compound of formula (VI):
- (R1)m(R2)nP—N(R3)H, (VI)
- in the presence of an HX-acceptor;
- and
- c) a cocatalyst.
13 more elements
Dependencies are inferred from the claim text.