Stabilization of hydrocracked oils with certain nitrogen containing aromatic components and phenolic components
AssigneeAtlantic Richfield Company
InventorThomas F. Wulfers
Life of this patent
Estimating the term…
Abstract
Hydrocracked lubricating oils are effectively stabilized against deterioration caused by light by the inclusion of at least one of each of certain nitrogen-containing aromatic components and phenolic components. The combination of such components, e.g., dialkyl anilines and alkyl substituted phenols, provide outstanding inhibition to sunlight deterioration.
Claims21
A composition of matter comprising a major amount by weight of a hydrocracked lubricating oil, a minor amount by weight of at least one added nitrogen-containing aromatic component having a structure:
- ##STR5## wherein each R is independently selected from the group consisting of H and substantially aliphatic monovalent hydrocarbonaceous radicals containing 1 to about 24 carbom atoms such that at least one R is a substantially aliphatic monovalent hydrocarbonaceous radical, and a minor amount by weight of at least one added phenolic component selected from the group consisting of:
- ##STR6## and mixtures thereof wherein each R' is independently selected from the group consisting of H and monovalent substantially hydrocarbonaceous radicals containing 1 to about 24 carbon atoms, provided that at least one of said R's associated with each phenyl ring is a monovalent substantially hydrocarbonaceous radical, R" is a divalent substantially hydrocarbonaceous radical containing from 1 to about 24 carbon atoms, and x is an integer having a value of zero or 1, said nitrogen-containing aromatic component and said phenolic component being present in an amount effective to reduce the susceptibility to sunlight deterioration of said hydrocracked oil.
A method for inhibiting a hydrocracked lubricating oil from deterioration caused by sunlight comprising combining with said oil a minor, effective amount by weight of at least one added nitrogen-containing aromatic component having a structure:
- ##STR7## wherein each R is independently selected from the group consisting of H and substantially aliphatic monovalent hydrocarbonaceous radicals containing 1 to about 24 carbon atoms such that at least one R is a substantially aliphatic monovalent hydrocarbonaceous radical, and a minor effective amount by weight of at least one added phenolic component selected from the group consisting of:
- ##STR8## and mixtures thereof wherein each R' is independently selected from the group consisting of H and monovalent substantially hydrocarbonaceous radicals containing 1 to about 24 carbon atoms, provided that at least one of said R's associated with each phenyl ring is a monovalent substantially hydrocarbonaceous radical, R" is a divalent substantially hydrocarbonaceous radical containing from 1 to about 24 carbon atoms, and x is an integer having a value of zero or 1, said nitrogen-containing aromatic component and said phenolic component being present in an amount effective to reduce the susceptibility to sunlight deterioration of said hydrocracked oil.
Dependencies are inferred from the claim text.