Metal corrosion inhibitor for use in aqueous acid solutions
US6056896A · kind A · utility
5Cited by
13References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 28, 1998 |
| Grant date | May 2, 2000 |
| Priority date | — |
| Expiry date | May 28, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/939
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides an improved metal corrosion inhibitor for use in aqueous acid solutions which is relatively non-toxic and inexpensive. The corrosion inhibitor is a mixture comprised of oligomerized aromatic amines prepared by contacting the still bottoms residue produced in the distillation of quinoline from coal tar with oxygen in the presence of a catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.