Producing pure iron oxides
US4086321A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1976 |
| Grant date | Apr 25, 1978 |
| Priority date | — |
| Expiry date | Jun 21, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/01
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method and apparatus for producing pre metallic oxides by dissolving the metal or oxide in heated dilute hydrochloric acid to form metallic chloride in a water solution (which solution may instead, be a waste product from a steel strip pickling line), reacting said solution in a reactor in the presence of heated oxygen to form metal oxide, part of which oxide being carried over in vapor form to a variable throat venturi where it is redissolved and reintroduced into the reactor to insure that only low chloride oxide will be discharged as a product. The system operates under negative pressure to prevent leakage tendency of HCl to the outside atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.