Entrained downflow chlorination of fine titaniferous material
US4442076A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 1982 |
| Grant date | Apr 10, 1984 |
| Priority date | — |
| Expiry date | Nov 17, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An entrained flow process for chlorinating fine iron-containing titaniferous powder with chlorine gas and/or organochlorides in the presence of fine porous coal-based reductant powder for obtaining product chlorides of titanium and iron wherein said both of said powders are entrained in and flow downwardly through a chlorination reaction zone at a temperature of at least about 800.degree. C. is improved by: (a) supplying fine titaniferous and reductant powders to said reaction zone at a rate sufficient for establishing and maintaining titanium, iron and carbon reactants therein in substantial excess over those stoichiometric for the complete reaction of the chlorine present; (b) employing as at least the major portion of fresh reductant feed reactive char having surface area of at least about 10 m..sup.2 /g. and particle size of -140 mesh; (c) separating carbon and titaniferous solids from the effluent of said reaction zone; and (d) recycling at least a major portion of the resulting separated solids as about -140 mesh powder into said reaction zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.