Billy Dean Oakes

US Patent:

41431197, Mar 6, 1979

Filed:

Jun 16, 1977

Appl. No.:

5/807089

Inventors:

Robert G. Asperger - Midland MI
Leroy S. Krawczyk - Lake Jackson TX
Billy D. Oakes - Lake Jackson TX

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

B01D 5334

US Classification:

423226

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.

US Patent:

44527640, Jun 5, 1984

Filed:

Jul 22, 1983

Appl. No.:

6/516073

Inventors:

Billy D. Oakes - Lake Jackson TX
Michael S. Dupart - Alvin TX
David C. Cringle - Melbourne, AU

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

B01D 5334

US Classification:

423228

Abstract:

A corrosion inhibited composition containing an aqueous gas conditioning solution such as an alkanolamine with small amounts of soluble trivalent bismuth compounds. The compositions are useful to separate acid gases such as carbon dioxide from feed streams in gas conditioning apparatus with minimum amounts of corrosion of the stainless steel.

US Patent:

43702562, Jan 25, 1983

Filed:

Mar 24, 1980

Appl. No.:

6/133214

Inventors:

Billy D. Oakes - Lake Jackson TX

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C23F 1104
C23G 106

US Classification:

252391

Abstract:

The corrosion of aluminum in the presence of aqueous mineral acid solutions containing conventional nitrogen base ferrous metal corrosion inhibitors is markedly reduced by incorporating an alkyl, aryl or alkylaryl sulfonate or sulfate surface active agent as an additional corrosion inhibiting agent.

US Patent:

44461194, May 1, 1984

Filed:

Apr 29, 1982

Appl. No.:

6/372869

Inventors:

Michael S. DuPart - Alvin TX
Billy D. Oakes - Lake Jackson TX
David C. Cringle - Melbourne, AU

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

B01D 5334
C23F 1106

US Classification:

423228

Abstract:

A corrosion inhibited composition containing a gas conditioning solution such as an alkanol amine with water or with organic solvents and with small amounts of soluble thiocyanate compounds, soluble trivalent bismuth compounds with or without soluble divalent nickel or cobalt compounds. The compositions are useful to separate acid gases such as carbon dioxide from hydrocarbon feed streams in gas conditioning apparatus with minimum amounts of corrosion of the ferrous surfaces.

US Patent:

44203373, Dec 13, 1983

Filed:

Jul 1, 1982

Appl. No.:

6/394209

Inventors:

Billy D. Oakes - Lake Jackson TX
Michael S. Dupart - Alvin TX
David C. Cringle - Melbourne, AU

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C09K 300

US Classification:

106 1415

Abstract:

A corrosion inhibited composition containing an aqueous gas conditioning solution such as an alkanolamine with small amounts of soluble trivalent bismuth compounds. The compositions are useful to separate acid gases such as carbon dioxide from feed streams in gas conditioning apparatus with minimum amounts of corrosion of the stainless steel.