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US 12,006,483 B2Granted
Phosphorous-free oil soluble molybdenum complexes for high temperature naphthenic acid corrosion inhibition
AssigneeEcolab USA Inc.
InventorsOussama Zenasni, Philip Andrew Thornthwaite, Maria DeJesus Marquez, John Nathan Scholz
Life of this patent
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Abstract
Disclosed are sulfur-containing molybdenum complexes used in compositions and methods for inhibiting or reducing high temperature corrosion in petroleum refineries.
Claims19
A method of inhibiting corrosion of a metal surface that is contacted by a hydrocarbon fluid source containing acidic corrodents, comprising:
- introducing into the hydrocarbon fluid source containing acidic corrodents a phosphorus-free, sulfur-containing molybdenum complex having the general formula selected from Formula II:
- wherein R and R′ each represents a group selected from an alkyl group comprising one or more hydroxyl groups, an alkyl group, an alkenyl group, or an aryl group;
- and each X represents oxygen or sulfur and can be the same or different but where at least one X in Formula II is sulfur.
Dependencies are inferred from the claim text.