Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group iiia metal or beryllium
Patent
1995-03-02
1996-12-17
Bos, Steven
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group iiia metal or beryllium
423139, 423157, C01F 700, C01F 1100, C01G 4900
Patent
active
055850804
ABSTRACT:
The present invention relates to a method for recovering iron chloride, aluminum chloride and calcium chloride from silicon and ferrosilicon or from residues which contain silicon and/or ferrosilicon and metal chlorides and optionally copper and/or copper compounds, which materials are leached with HCl or HCl+FeCl.sub.3 /FeCl.sub.2 solutions, whereafter the solid silicon or ferrosilicon residue is removed from the leach solution and where any copper is removed from the leach solution. Fe.sup.2+ in the leach solution is oxidized to Fe.sup.3+ whereafter the leach solution is subjected to a liquid-liquid extraction by means of an organic phase containing n-tributyl phosphate dissolved in a hydrocarbon solvent in order to extract FeCl.sub.3 and at least a part of CaCl.sub.2 from the leach solution, stripping FeCl.sub.3 and any CaCl.sub.2 from the organic phase by water, concentrating the remaining solution by evaporation and adding HCl gas to the solution in order to selectively precipitate AlCl.sub.3.6H.sub.2 O from the solution and recovering AlCl.sub.3.6H.sub.2 O from the solution by filtration.
REFERENCES:
patent: 3809548 (1974-05-01), Aas et al.
patent: 3832165 (1974-08-01), Kane et al.
patent: 4054638 (1977-10-01), Dreulle et al.
patent: 4237102 (1980-12-01), Cohen et al.
patent: 4261959 (1981-04-01), Kim et al.
patent: 4332684 (1982-06-01), DeSchepper et al.
patent: 4490338 (1984-12-01), DeSchepper et al.
patent: 4582691 (1986-04-01), Fujimoto et al.
patent: 5228903 (1993-07-01), O'Keefe
Lo, T. C., et al, Handbook of Solvent Extraction, 1983, no month, pp. 676-677.
Andersen Einar
Ceccaroli Bruno
Gundersen Roald
Bos Steven
Elkem a/s
LandOfFree
Method for recovering iron chloride, aluminum chloride and calci does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for recovering iron chloride, aluminum chloride and calci, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for recovering iron chloride, aluminum chloride and calci will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1989177