Method and composition for inhibiting the corrosion of ferrous m

Details Method and composition for inhibiting the corrosion of ferrous m Method and composition for inhibiting the corrosion of ferrous m

1977-06-16

1979-03-06

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423228, 423229, 423232, 252189, 252389R, 252390, B01D 5334

Patent

active

041431197

ABSTRACT:
A copper based corrosion inhibitor composition and a method for employing the same to prevent corrosion of metal in contact with acid-gases, i.e., hydrogen sulfide, carbonyl sulfide and carbon dioxide. Copper, or a copper compound and sulfur or a sulfur compound, is maintained in solution in contact with the metal under conditions of operation, particularly the thermal regeneration, which provide copper ions and sulfur atoms, particularly polysulfide moieties at the surface of the metal, e.g. copper sulfide is dissolved in an aqueous alkanolamine, monoethanolamine, solution used as an absorbent for acid-gas removal from sour-gas. The copper and sulfur moieties may be formed in situ or prepared and added in solution. The inhibitor has particular utility in protecting metal surfaces which are subject to corrosion as an incidence of the acid-gas content of either natural or synthetic gases.

REFERENCES:
patent: 1989004 (1935-01-01), Fife
patent: 2405672 (1946-08-01), Reitmeier
patent: 2559580 (1951-07-01), Alexander
patent: 3372981 (1968-03-01), Ravner et al.
patent: 3932583 (1976-01-01), Schievelbein

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