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US 12,516,258 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.
Claims18
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 I:
- Mo2—(S—R)n Formula I
- wherein each R of Formula I represents an oxygen, nitrogen or carbon-containing group;
- and n is 4-10.
1 more element
Dependencies are inferred from the claim text.