Quaternary ammonium compounds useful for inhibiting metal corros

Details Quaternary ammonium compounds useful for inhibiting metal corros Quaternary ammonium compounds useful for inhibiting metal corros

1997-05-13

1998-05-26

O'Sullivan, Peter

Compositions

Preservative agents

Anti-corrosion

1663051, 166307, 166308, 25238923, 252390, 252392, 422 12, 507116, 507130, 507218, 507240, 507242, 507243, 507260, 507922, 507923, 507933, 507934, 507939, C09K 700, C23F 1104

Patent

active

057560048

ABSTRACT:
The present invention provides improved quaternary ammonium compounds useful as metal corrosion inhibitors in aqueous acid solutions, methods of preparing the compounds, metal corrosion inhibited aqueous acid solutions containing the compounds and methods of protecting metal surfaces from acid corrosion using the compounds. The compounds are prepared by contacting the still bottoms residue produced in the distillation of quinoline from coal tar with oxygen to oligomerize aromatic amines contained therein and then reacting the oligomerized amines with a benzylhalide.

REFERENCES:
patent: H751 (1990-03-01), Sullivan et al.
patent: 2758970 (1956-08-01), Sankaitis et al.
patent: 4498997 (1985-02-01), Walker
patent: 4552672 (1985-11-01), Walker
patent: 4698168 (1987-10-01), Briggs
patent: 5366643 (1994-11-01), Walker
patent: 5441929 (1995-08-01), Walker

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