Process for removing phosphorus-containing colloids and their precursors from iron chloride solutions
US8182779B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 14, 2010 |
| Grant date | May 22, 2012 |
| Priority date | — |
| Expiry date | Nov 20, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/16
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The disclosure provides a process for removing phosphorus-containing colloids and their precursors from an iron chloride solution comprising: (a) heating the iron chloride solution comprising impurities selected from the group consisting of phosphorus-containing colloid, phosphorus-containing colloid precursor, and mixtures thereof, at a temperature of about 100° C. to about 300° C., at least autogenous pressure and for a period of time sufficient to transform the impurities into a filterable solid; and (b) separating the solid from the iron chloride solution. In one embodiment, the iron chloride solution is a byproduct of the chloride process for making titanium dioxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.