METHOD AND COMPOSITIONS FOR INHIBITION OF NAPHTHENIC ACID INDUCED CORROSION

摘要

Corrosion induced by the presence of naphthenic acid in hydrocarbon fluid s, particularly where such fluids are at elevated temperatures, may be inhib ited or controlled through use of corrosion inhibiting compositions comprisi ng a combination of a minor portion of a phosphorus-based constituent and a major portion of a sulfur-based constituent, nitrogen-based constituent, or combination thereof. In another embodiment the sulfur-based constituent and/ or nitrogen-based constituent may be used without any phosphorus-based const ituent. Where the compounds are appropriately selected, the compositions may inhibit corrosion to a degree comparable or nearly comparable to the inhibi tion provided by an equal amount of some conventional phosphorus-based compo unds alone, but are significantly less likely to impair catalyst activity in downstream cracking and refining operations.