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US 4,117,236 AGranted
Phosphonium compounds
AssigneePetrolite Corporation
InventorDerek Redmore
Life of this patent
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Abstract
Phosphonium compounds of the formula ##STR1## where Y is --CH.sub.2 OH or --CH.sub.2 OOCCH.sub.2 PR.sub.3, n is an integer of 2 - 4, R is a substituted group, preferably hydrocarbon, such as alkyl, cycloalkyl, aryl, etc., and X is a negative ion. These compounds are used in inhibiting the corrosion of metals and particularly in preventing corrosion of metals, particularly iron, steel and ferrous alloys.
Claims13
A phosphonium acetic acid ester of pentaerythritol of the formula ##STR38## where Y is --CH.sub.2 OH or --[CH.sub.2 OOCH.sub.2 PR.sub.3 ]-CH.sub.2 OOCCH.sub.2 PR.sub.3,
- n is an integer of 2-4,
- R is an alkyl radical of 1 to 16 carbon atoms, an alkenyl radical having 2 to 18 carbon atoms, an alkinyl radical having 2 to 18 carbon atoms, and
- X is a halogen, sulfate, phosphate, sulfonate, phosphonate, acetate, oxalate, benzoate, maleate, oleate, perchlorate or picrate.
Dependencies are inferred from the claim text.