Claims
- 1. A process of inhibiting corrosion of metals in a corrosive aqueous medium containing brine which comprises incorporating into said corrosive medium from about 10 p.p.m. to about 10,000 p.p.m. of (1) the products produced by reacting about 1 mole of an unsaturated nitrile of the formula ##STR20## wherein R' and R" are hydrogen or alkyl, aryl, cycloalkyl, alkaryl, and aralkyl with about 3 moles of an alkanolamine which comprises mixing said nitrile and alkanolamine and then heating said mixture at a temperature and for a time so that one mole of the alkanolamine reacts with the unsaturated group to form an N-alkanol group and the other 2 moles of the alkanolamine react with the nitrile group to form an hydroxyalkylaminoalkylamide group, or (2) quaternaries thereof.
- 2. The process of claim 1 which comprises incorporating into said corrosive medium the quaternaries of the products of claim 1.
- 3. The process of claim 1 which comprises incorporating into said corrosive medium the quaternaries of the products of claim 2.
- 4. The process of claim 1 which comprises incorporating into said corrosive medium the quaternaries of the products of claim 3.
- 5. The process of claim 1 which comprises incorporating into said corrosive medium the quaternaries of the products of claim 4.
- 6. The process of claim 1 which comprises incorporating into said corrosive medium the quaternaries of the products of claim 5.
- 7. The process of claim 1 where the unsaturated nitrile is an acrylo- or a substituted acrylo-nitrile.
- 8. The process of claim 7 where the unsaturated nitrile is acrylonitrile.
- 9. The process of claim 7 where the quaternaries are of ##STR21##
- 10. The process of claim 7 where the quaternaries are of ##STR22##
- 11. The process of claim 1 where the unsaturated nitrile is an arylnitrile.
- 12. The process of claim 11 where the arylnitrile is .phi.CH=CH-CN.
- 13. The process of claim 11 where the quaternaries are of ##STR23##
- 14. The process of claim 1 which comprises incorporating into said corrosive medium the quaternaries of hydroxyalkylaminoalkylamides of the general formula ##STR24## where R is a hydrocarbon and A is alkylene.
- 15. The process of claim 14 where R s aryl.
- 16. The process of claim 15 where R is phenyl.
- 17. The process of claim 15 where the quaternaries are of ##STR25##
- 18. The process of claim 15 where the quaternaries are of ##STR26##
- 19. The process of claim 15 where the quaternaries are of ##STR27##
Parent Case Info
This application is a Division of Application Ser. No. 684,711 filed May 10, 1976, now U.S. Pat. No. 4,060,553, issued Nov. 29, 1977.
US Referenced Citations (8)
Divisions (1)
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Number |
Date |
Country |
Parent |
684711 |
May 1976 |
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