Protecting steel and ferrous metals against H2 S corrosion

Abstract

Abstract An antifoaming inhibitor of hydrogen sulphide corrosion which is a compound of the general formula: ##STR1## where R is a divalent normal or branched alkyl containing from 1 to 6 carbon atoms, n=1 or 2; when n=1 R' and R" are hydrogen or branched alkyl containing from 1 to 20 carbon atoms, normal or branched alkenyl containing from 3 to 14 carbon atoms, oxyalkyl containing from 1 to 20 carbon atoms, cycloalkyl containing from 5 to 6 carbon atoms, R' and R" are --(CH 2 ) m --, where m=2-10, --(CH 2 ) 2 --NH--(CH 2 ) 2 --; --(CH 2 ) 2 --O--(CH 2 ) 2 --; when n=2 R' is hydrogen, normal or branched alkyl containing from 1 to 20 carbon atoms, normal or branched alkenyl containing from 3 to 14 carbon atoms, R' is --(CH 2 ) k , where k=2-10, --(CH 2 ) 2 --NH--(CH 2 ) 2 --. The proposed inhibitor is effective in acid, weak acid, and alkaline media in a wide range of hydrogen sulphide content. Antifoaming properties of the proposed inhibitor are 7-8 times higher than those of the foam suppressor Rodorsyl 426 A produced by "Rhone-poulenc Chimie fine", France, used in combination with the inhibitor Visco-904 produced by "Nalko", USA.

Inventors

• 👤 Iosif L. Rozenfeld
• 👤 Vera M. Brusnikina
• 👤 Larisa V. Frolova
• 👤 Alevtina A. Lyashenko
• 👤 Jury V. Sokolov
• 👤 Boris V. Bocharov
• 👤 Alexandr V. Fokin
• 👤 Nikolai E. Legezin
• 👤 Ekaterina V. Dergobuzova
• 👤 Boris N. Altshuler
• 👤 Saida A. Zelenaya
• 👤 Emma S. Korobova

Bibliographic Details