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US 2022/0033725 A1Published application
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
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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.
Claims20
A method of inhibiting corrosion comprising:
- introducing into a fluid source containing corrodents a sulfur-containing molybdenum complex having the general formula selected from Formula I or II:
- Mo2—(S—R)n Formula I
- Wherein R represents an oxygen, nitrogen or carbon-containing compounds such as alcohols, alkyl, alkenyl, amides, amines, or aryl groups;
- n is 4-10.
- R and R′ each represents an oxygen, nitrogen or carbon-containing compounds such as alcohols, alkyl, alkenyl, amides, amines, or aryl groups;
- and X represents oxygen or sulfur and can be the same or different but where at least one X in the formula is sulfur.
3 more elements
A composition comprising a sulfur-containing molybdenum complex to inhibit corrosion in a fluid source containing corrodents and in contact with a metal containment, the sulfur-containing molybdenum complex comprising the formula selected from Formula I or II:
- Mo2—(S—R)n Formula I
- Wherein R represents an oxygen, nitrogen or carbon-containing compounds such as alcohols, alkyl, alkenyl, amides, amines, or aryl groups;
- n is 4-10.
- R and R′ each represents an oxygen, nitrogen or carbon-containing compounds such as alcohols, alkyl, alkenyl, amides, amines, or aryl groups;
- and X represents oxygen or sulfur and can be the same or different but where at least one X in the formula is sulfur.
2 more elements
A treated metal containment comprising:
- a metal containment comprising a metal surface and a fluid source comprising the sulfur-containing molybdenum complex having Formula I or II and wherein at least a portion of the metal surface is contacted by the fluid source:
- Mo2—(S—R)n Formula I
- Wherein R represents an oxygen, nitrogen or carbon-containing compounds such as alcohols, alkyl, alkenyl, amides, amines, or aryl groups;
- n is 4-10.
- R and R′ each represents an oxygen, nitrogen or carbon-containing compounds such as alcohols, alkyl, alkenyl, amides, amines, or aryl groups;
- and X represents oxygen or sulfur and can be the same or different but where at least one X in the formula is sulfur.
3 more elements
Dependencies are inferred from the claim text.