Process for producing iron oxide products from waste liquids containing ferrous salts
US3970738A · kind A · utility
22Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1974 |
| Grant date | Jul 20, 1976 |
| Priority date | — |
| Expiry date | Dec 23, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/01
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The processes for producing iron oxide products from a solution of ferrous salts selected from the group consisting of waste liquid containing ferrous salts and aqueous solution in which ferrous salts obtained from the waste liquid are dissolved, under the acid, wet and high ferrous concentration conditions. More particularly, the processes for purifying said waste liquids comprising the bivalent iron removing steps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.