Production of concentrated aqueous solutions of ferric chloride
US5219531A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1992 |
| Grant date | Jun 15, 1993 |
| Priority date | — |
| Expiry date | Apr 9, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01G49/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Concentrated aqueous solutions of ferric chloride, directly useful as flocculating agents in a variety of water treatments, are prepared by (a) reacting chlorine, advantangeously a stoichiometric amount of chlorine, with an aqueous solution of ferrous chloride in the presence of an aqueous solution of ferric chloride, in an essentially vertical reaction zone, with at least a major amount of the ferrous chloride solution being introduced to the upper section of such reaction zone, at least a major amount of the chlorine being introduced countercurrently to the base of such reaction zone, and the ferric chloride solution being introduced at at least one point intermediate such ferrous chloride solution/chlorine inlets, and (b) recovering final product aqueous solution of ferric chloride from the base of the reaction zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.