C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/156, 53/162,
C22B 3/04 (2006.01) C01F 15/00 (2006.01) C01F 17/00 (2006.01) C22B 1/08 (2006.01) C22B 1/10 (2006.01) C22B 3/10 (2006.01) C22B 3/16 (2006.01) C22B 3/26 (2006.01) C22B 34/12 (2006.01) C22B 59/00 (2006.01)
Patent
CA 2022600
ABSTRACT OF THE INVENTION This is a process for extracting scandium from titanium ore. It utilizes feeding titanium ore to a fluidized bed chlorinator at about 1000°C to produce a vaporous (generally titanium and possibly iron chlorides) phase and a solid residue and recovering scandium from the solid residue. Surprisingly, despite the relatively low sublimation temperature of scandium chloride the very low level of scandium present in titanium ore is concentrated in the residue (rather than going with the vapor phase, where it would not be concentrated), making recovery of scandium from the titanium ore economically feasible. Generally, the process can be part of the production of titanium metal or titanium oxide, whereby scandium is a byproduct of titanium production. Preferably, the recovery is performed by leaching the residue with aqueous acid (e.g. HCl) to produce a scandium-containing aqueous solution, followed by contacting the aqueous solution with a polyalkyl phosphate-containing organic phase, the polyalkyl phosphate (e.g. tributyl phosphate) extracting scandium into the organic phase, followed by scandium precipitation by an ammonium addition to produce a scandium hydroxide precipitate and the scandium hydroxide is calcined, whereby scandium is recovered as an oxide. The residue generally also contains yttrium and lanthan- ides, and the yttrium and lanthanides can also be recovered from the residue as a part of the scandium recovery process. The recovering of the scandium chloride from the residue can also be performed by leaching the residue with alcohol (preferably methanol) to produce a 55,390 scandium-containing alcohol solution (the remaining residue can then be recycled to the chlorinator). The leaching with alcohol can be followed by contacting the alcohol solution with oxalic acid to precipitate oxalates of scandium, thorium, and lanthanides.
Bereskin & Parr
Westinghouse Electric Corporation
LandOfFree
Recovery of scandium, yttrium and lanthanides from titanium ore does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Recovery of scandium, yttrium and lanthanides from titanium ore, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recovery of scandium, yttrium and lanthanides from titanium ore will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1449008