Method of removing iron oxide deposits from heat transfer surfaces
US4190463A · kind A · utility
15Cited by
19References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 5, 1979 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Feb 5, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28G9/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Iron oxide deposits which are found on heat transfer surfaces can be removed by first contacting these deposits with an aqueous solution of a hydrolyzable tanning extract such as sumach, valonea, or chestnut tannin which conditions the deposits and forms a complex thereof. The thus-formed complex is subsequently removed by treatment with dilute solutions of citric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.