Cyclic N-hydroxyimide detergent additives
AssigneeAmerican Cyanamid Company
InventorStephen F. Donovan
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Abstract
Cyclic N-hydroxyimide compounds derived from tartaric acid are provided which exhibit strong metal ion chelating ability, making them useful as detergent additives, in boiler water systems, as reaction intermediates, etc. A detergent composition containing N-hydroxyimide compounds as detergent additives is also disclosed.
Claims7
A cyclic N-hydroxyiide compound having the formula ##STR5## wherein X is --OH or --O.sup.- M.sup.+, where M.sup.+ is an alkali metal or ammonium cation.
A detergent additive prepared by reacting an ester selected from diemthyl, diethyl, dipropyl, diisopropyl, dibutyl or diisobutyl tartrate or L-tartrate with hydroxylamine or hydroxylamine hydrochloride in the presence of an organic base selected from sodium ethoxide, pyridine, triethylamine, or quinoline until a cyclic N-hydroxyimide is obtained.
Dependencies are inferred from the claim text.