N-Hydroxyalkyl pyrrolidinone esters as detergent compositions and lubricants and fuel containing same
AssigneeMobil Oil Corporation
InventorSheldon Chibnik
Life of this patent
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Abstract
Esters of hydroxyalkylpyrrolidinones and alkenylsuccinic anhydrides are effective detergent additives for hydrocarbyl lubricants and fuels.
Claims15
A composition comprising a major proportion of a mineral oil of lubricating viscosity synthetic oil of lubricating viscosity, greases prepared from said oils of lubricating viscosity or normally liquid hydrocarbon fuel and a minor amount sufficient to impart detergent and dispersant properties thereto of a hydroxyalkylpyrrolidone ester or polymer thereof wherein said hydroxyalkylpyrrolidinone ester is obtained by reacting, in substantially equimolar amounts, a lactone with a hydroxyamine at a temperature of from about 110.degree. to about 300.degree. C. having the following general formula:
- NH.sub.2 R(OH)n
- where R is a hydrocarbyl group having from 1 to about 30 carbon atoms and n is from 1 to about 6 and thereafter esterifying the resulting hydroxyalkylpyrrolidinone product of said reaction with an alkenylsccinic anhydride, at a temperature of from about 110.degree. to about 250.degree. C., wherein the alkenyl group of said succinic anhydride has from about 8 to about 300 carbon atoms, in a molar ratio of from about 1:1 to about 1:10 of said anhydride to said hydroxyalkylpyrrolidinone product.
A compound prepared by (a) reacting under suitable reaction conditions at a temperature of from about 110.degree.-300.degree. C. in substantially equimolar amounts a lactone and a hydroxyamine having the following general formula:
- NH.sub.2 R(OH)n
- where R is an alkyl, cycloalkyl or aralkyl group having from 1 to about 30 carbon atoms and n is from 1 to about 6 and thereafter (b) esterifying the resultant hydroxyalkylpyrrolidinone product of reaction (a) at a temperature of from about 110.degree.-250.degree. C. with an alkenyl anhydride wherein the alkenyl group has from about 8 to about 300 carbon atoms in a molar ratio of from about 1:1 to about 1:10 of the pyrrolidinone anhydride to the anhydride.
A process of preparing a dispersant or detergent additive compound comprising (a) reacting under suitable conditions at a temperature of from about 110.degree.-300.degree. C. in substantially equimolar amounts a lactone with a hydroxyamine having the following general formula:
- NH.sub.2 R(OH)n
- where R is alkyl, cycloalkyl, aryl or arylkyl group having from 1 to about 30 carbon atoms and n is from 1 to about 6 and (b) thereafter esterifying the resulting hydroxyalkylpyrrolidinone product of (a) at a temperature of from about 110.degree.-250.degree. C. with an alkenyl anhydride, wherein the alkenyl group has from 8 to 300 carbon atoms in a molar ratio of from about 1:1 to about 1:10 of the pyrrolidinone to the anhydride.
Dependencies are inferred from the claim text.