Hydrocarbon lube and distillate fuel additive
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United States of America Patent
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Jan 30, 1996
Grant Date -
N/A
app pub date -
Jan 6, 1994
filing date -
Jan 6, 1994
priority date (Note) -
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Abstract
A hydrocarbon oligomer and a process for its production is disclosed that is useful as a pour point depressant and as a combination pour point depressant and viscosity index improver for mineral oil or synthetic oil. The oligomer is also useful in modifying wax crystal formation at low temperature when added to distillate fuels. The oligomer is a near linear copolymer of a mixture of ethylene and C.sub.3 -C.sub.28 1-alkenes, or only 1-alkenes, wherein a large proportion of the pendant alkyl groups of the recurring 1-alkene monomer units contain between 14 and 22 carbon atoms. The oligomer is produced by polymerization of mixed 1-alkenes with reduced chromium oxide catalyst on silica support.
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