US Patent No: 5,637,784
Number of patents in Portfolio can not be more than 2000
Hydrocarbon distillate fuels containing novel additive
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Jun 10, 1997
Issued date -
Sep 28, 1995
filing date -
08/536,724
serial no -
Expired
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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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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 4,827,064 High viscosity index synthetic lubricant compositions | 141 | 1988 | |
| 5,146,021 VI enhancing compositions and Newtonian lube blends | 15 | 1991 | |
| 5,157,177 VI enhancing compositions and newtonian lube blends | 14 | 1991 | |
| 5,264,642 Molecular weight control of olefin oligomers | 13 | 1992 | |
| 5,243,114 Oligomerization of alpha-olefins over layered silicate compositions containing pillars of silica and group VIB metal oxide | 32 | 1992 | |
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| 4,827,023 Process for the selective formation of dialkyl succinates | 1 | 1987 | |