Back to results
US 10,723,673 B2Granted
Oligomerisation process
AssigneePetroliam Nasional Berhad (Petronas)
InventorsMartin Philip Atkins, Kenneth Richard Seddon, Malgorzata Swadzba-Kwasny, Fergal Coleman
Life of this patent
Estimating the term…
Abstract
A process is provided for the selective oligomerisation of C5 to C20 alpha-olefins to produce polyalphaolefin oligomers with a molecular weight distribution that is suitable for use in lubricant base oils.
Claims20
A process for the preparation of alpha-olefin oligomers, comprising contacting an olefinic feedstock comprising C5 to C20 alpha-olefins with a liquid complex catalyst consisting essentially of:
- (i) at least one metal halide salt of the formula MX3, wherein M is selected from aluminium and gallium, and each X is independently selected from chlorine, bromine and iodine;
- and
- (ii) at least one Lewis basic donor ligand containing a donor atom selected from oxygen, sulphur, nitrogen, phosphorus, arsenic and selenium;
- wherein the molar ratio of the at least one metal halide salt to the at least one Lewis basic donor ligand is in the range of from 1:1 to 4:1, and wherein the at least one Lewis basic donor ligand is selected from the group of compounds consisting of ketones, sulfoxides, phosphine-oxides, ureas, amides, thioketones, thioureas, thioamides, thioethers, amines, nitriles and phosphines;
- and
- wherein the contacting produces a product having a fraction which comprises dimers, trimers, and tetramers, wherein the product predominantly comprises the fraction.
3 more elements
Dependencies are inferred from the claim text.