Method of coating steel substrates to reduce carbonaceous deposition thereon
US4427721A · kind A · utility
4Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1981 |
| Grant date | Jan 24, 1984 |
| Priority date | — |
| Expiry date | Feb 24, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S376/90
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Carbonaceous deposition on the surface of steel cracker tubes in chemical plant for the thermal cracking of hydrocarbons is a serious problem. It is met, in the invention, by providing the surface with a refractory oxide coating by contacting the surface with a sol comprising an aqueous dispersion of substantially unaggregated primary particles, the sol being capable of conversion to a gel the bulk density of which being at least 40% of the theoretical density of the refractory oxide when measured at ambient temperature and the gel being convertible to the refractory material, converting the sol to the gel, and firing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.