Chemistry of hydrocarbon compounds – Plural serial diverse syntheses – To produce unsaturate
Patent
1990-08-03
1991-05-14
Pal, Asok
Chemistry of hydrocarbon compounds
Plural serial diverse syntheses
To produce unsaturate
585314, 585510, 585530, 585722, 585723, 585725, 585726, 585727, 585730, C07C 212, C07C 262
Patent
active
050157957
ABSTRACT:
The thermal stability of synthetic lubricants composed of alpha-olefin oligomers is improved by reaction with an olefin such as decene or the lower molecular weight, non-lubricant range olefins produced in the course of the oligomerization of 1-alkenes. The alkylation of the lube range oligomer is carried out using acidic alkylation catalyst such as solid, open-pore catalyst, e.g., fluorided alumina.
The improved lubricant compositions of the present invention comprise a high viscosity index liquid lubricant oligomer composition containing C.sub.30 -C.sub.1300 hydrocarbons with at least one higher alkyl branch per oligomer molecule, said alkyl branch containing between 12 and 40 carbon atoms. In a preferred embodiment the novel alkylated lubricant composition has a methyl to methylene branch ratio of less than 0.19 and pour point below -15.degree. C.
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Keen Malcolm D.
McKillop Alexander J.
Mobil Oil Corporation
Pal Asok
Speciale Charles J.
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