Polar lubricating fluid and a method for its synthesis
AssigneeMobil Oil Corporation
InventorsWerner O. Haag, Robert E. Palermo
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Abstract
A polar lubricating fluid comprising aliphatic molecules having hydroxy or ester functional groups. The alcohol lubricant molecules have at least 20 carbon atoms and the ester molecule comprises between 26 and 100 carbon atoms. The oxygenate content of both molecules is at least 0.2 mmoles per gram of lubricant. The alcohol lubricating fluid is produced by a process comprising hydroformylating olefins having at least 20 carbon atoms in the presence of a hydroformylating catalyst and synthesis gas comprising H.sub.2 and CO. The ester lubricating fluid is produced by a subsequent acylation. The reaction is carried out between 150.degree. C. and 300.degree. C.
Claims19
A polar lubricating fluid comprising a mixture of primary aliphatic alcohols having at least 20 carbon atoms and having at least 0.2 mmol of oxygenate per gram of fluid, a viscosity of at least 123.6 cs at 38.degree. C. and a viscosity index greater than 44.
A polar lubricating fluid comprising a mixture of primary aliphatic esters having 26 to 100 carbon atoms wherein at 100.degree. C. said fluid has a viscosity greater than 3 cs and a viscosity index greater than 120.
A method for synthesizing a polar lubricating fluid comprising hydrocarbon moieties bearing at least one functional group selected from the group consisting of hydroxy and an ester of said hydroxy, comprising hydroformylating at a temperature in the range of 150.degree.-300.degree. C. olefins having at least 20 carbon atoms in the presence of a hydroformylation catalyst selected from the group consisting of rhodium and rhodium oxides and in the presence of synthesis gas comprising H.sub.2 and CO to produce an alcohol, and, for the production of an ester, subsequently acylating said alcohol.
Dependencies are inferred from the claim text.