Compositions – Leather or fur treating
Patent
1989-06-21
1991-02-19
Stoll, Robert L.
Compositions
Leather or fur treating
25238923, 25230953, 25240023, 25240053, C23F 1110
Patent
active
049941950
ABSTRACT:
A composition and methods for use in oilfield waterflood systems are disclosed. The composition is comprised of a phosphonate, a copolymer, and a permanganate and is effective at inhibiting the corrosion of metallic systems in petroleum oilfields caused by chlorine dioxide. Methods of use of phosphonate and permanganate alone are also disclosed. Chlorine dioxide is used in oilfield waterflood systems to control sulfides and sulfate reducing bacteria. However, chlorine dioxide is highly corrosive to the metallic components in the processing equipment of an oilfield system. The most effective system currently used to inhibit corrosion caused by chlorine dioxide comprises chromates. However, chromates are highly toxic and their use throughout the country is becoming increasingly restricted.
The use of a composition comprised of 1-hydroxyethylidene diphosphonic acid, a copolymer comprised of acrylic acid/allyl hydroxy propyl sulfonate ether and potassium permanganate has proved to be more effective than chromates as a chlorine dioxide corrosion inhibitor without the serious toxicological effects caused by the use of chromates.
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Edmondson James G.
Holder E. Paul
Fee Valerie
Stoll Robert L.
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