C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
31/43
C09K 15/00 (2006.01) C09K 15/10 (2006.01)
Patent
CA 1084253
A B S T R A C T A method for inhibiting corrosion of metals in contact with a circulating absorbent medium used for removal of acid gases from natural or synthetic gas streams, wherein there is introduced into the medium a product derived by reacting a monoalkanolamine at from 21°-100°C with sulfur or a sulfide and an oxidizing agent, together with copper or a copper salt, sulfide or oxide, for from 0.1-20 hours until the resulting mixture is stable when diluted with water. The sulfur or sulfur compounds are present in a ratio of 3 to 30 parts by weight per part of copper, and in an amount of 1-40 weight percent of the total composition. The product is added to the absorbent medium in an amount which maintains at least 0.00002 pounds of copper and 0.0002 pounds of sulfur per pound of absorbent medium per day. The advantage of this method is that the inhibitor can be added to the absorbent medium quickly and in measured amounts without waste of inhibitor.
289867
Davidson Jerry R.
Friedli Hans R.
Smart & Biggar
The Dow Chemical Company
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