Tetramerisation of Ethylene
AssigneeSasol Technology (Proprietary) Limited
InventorsMatthew James Overett, Munaka Christopher Maumela, Moses Mokgolela Mogorosi, Hulisani Maumela, Molise Stephen Mokhadinyana
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Abstract
A process for the tetramerisation of ethylene under solution phase conditions is carried out in the presence of an activated catalyst at a temperature above 80° C. and up to a temperature of about 130° C. The activated catalyst is provided by combining a source of chromium, a ligating compound, which ligating compound includes at least one fluorine substituted hydrocarbyl group, organoheteryl group, or heterohydrocarbyl group, and optionally a catalyst activator or combination of catalyst activators.
Claims18
A process for the tetramerisation of ethylene, the process including:
- (a) providing an activated catalyst comprising:
- i) a source of chromium;
- ii) a ligating compound of the formula
- R1R2P1XP2R3R4
- wherein P1 and P2 are phosphorus atoms;
- X is a linking group between P1 and P2;
- and
- R1 to R4 are independently a hydrocarbyl group, an organoheteryl group or a heterohydrocarbyl group, wherein at least one of R1, R2,
- R3, and R4 contains a fluorine substituent;
- and
- iii) optionally a catalyst activator or combination of catalyst activators;
- and
- (b) contacting ethylene to be tetramerised with the activated catalyst at a reaction temperature of from above 80° C. to about 130° C.
Dependencies are inferred from the claim text.