Back to results
US 11,597,890 B2Granted
Base stocks and oil compositions containing the same
AssigneeExxonMobil Chemical Patents Inc.
InventorsOmkar A. Namjoshi, Kyle G. Lewis, Wenning W. Han
Life of this patent
Estimating the term…
Abstract
This disclosure relates to base stocks comprising a C28-C32 hydrocarbon fraction and optionally a C42-C48 hydrocarbon fraction produced by dimerization and trimerization of a linear C14 mono-olefin, a linear C16 mono-olefin, or a mixture thereof, in the presence of a Lewis acid, oil compositions comprising such base stock(s), and processes for making such base stocks.
Claims21
A base stock comprising:
- a C28-C32 hydrocarbon fraction (“dimers”) produced by oligomerization of an alpha-olefin monomer feed selected from the group consisting of a linear C14 alpha-olefin, a linear C16 alpha-olefin, and a mixture thereof, in the presence of a Lewis acid catalyst system including BF3, ethanol and ethyl acetate, wherein the base stock has,
- a kinematic viscosity at 100° C. as determined pursuant to ASTM D445 (“KV100”) of 3.0 cSt to 5.0 cSt,
- a pour point as determined pursuant to ASTM D5850 of −45° C. to −15° C., and
- a cold-crank-simulator viscosity as determined pursuant to ASTM D5293 (“CCSV”) at −35° C. of at least 500 mPa·s,
- wherein the total concentration of the dimers is at least 95 wt %, based on the total weight of the base stock.
2 more elements
A base stock comprising:
- a C28 to C32 hydrocarbon first fraction at a concentration of at least 95 wt %, based on the total weight of the base stock and a C42 to C48 second fraction at a concentration in the range from 0 to 5 wt %, based on the total weight of the base stock, wherein the first and second fractions are substantially saturated and produced by oligomerization of an olefin monomer feed selected from the group consisting of a linear C14 alpha-olefin, a linear C16 alpha-olefin, and a mixture thereof,
- wherein the base stock includes,
- a kinematic viscosity at 100° C. as determined pursuant to ASTM D445 (“KV100”) in the range from 3.3 to 4.6 cSt,
- a pour point as determined pursuant to ASTM D5850 in the range from −45 to −10° C., and
- a cold-crank-simulator viscosity as determined pursuant to ASTM D5293 (“CCSV”) at −35° C. of at least 500 mPa·s.
2 more elements
A process for making a base stock, the process comprising:
- (I) providing an alpha-olefin monomer feed selected from the group consisting of a C14 linear alpha-olefin, a C16 linear alpha-olefin, and a mixture thereof;
- (II) contacting the alpha-olefin monomer feed with a catalyst system comprising BF3 in at least one oligomerization reactor under oligomerization conditions to obtain an oligomerization reaction mixture comprising unreacted alpha-olefin monomer(s), dimers, trimers, and the catalyst system;
- (III) quenching the oligomerization reaction mixture;
- (IV) removing the unreacted monomer(s) from the quenched oligomerization reaction mixture after step (III) to obtain an unsaturated product precursor;
- and
- (V) optionally hydrogenating the unsaturated product precursor in a hydrogenation reactor in the presence of hydrogen under hydrogenation conditions to obtain a hydrogenated oligomer oil;
- and
- (VI) obtaining the base stock comprising dimers and optionally trimers from the unhydrogenated product precursor or hydrogenated dimers and optionally hydrogenated trimers from the hydrogenated oligomer oil, wherein the base stock has,
- a kinematic viscosity at 100° C. as determined pursuant to ASTM D445 (“KV100”) of 3.0 cSt to 5.0 cSt,
- a pour point as determined pursuant to ASTM D5850 of −45° C. to −15° C., and
- a cold-crank-simulator viscosity as determined pursuant to ASTM D5293 (“CCSV”) at −35° C. of at least 500 mPa·s,
- wherein the total concentration of the dimers or the hydrogenated dimers is at least 95 wt %, based on the total weight of the base stock.
9 more elements
Dependencies are inferred from the claim text.