US 2018/0023168 A1 · METHOD FOR RECOVERING SCANDIUM

Abstract

Provided is a method for recovering scandium with which scandium can be efficiently recovered as high purity scandium oxide from a scandium-containing solution containing impurities such as iron without causing problems such as increased cost and safety problems. According to the method for recovering scandium according to the present invention, the pH of a solution containing scandium and iron (scandium-containing solution) is adjusted within the range of not less than −0.5 and less than 1, then scandium oxalate is obtained by adding the pH adjusted solution to an oxalic acid solution, and the scandium oxalate is roasted into scandium oxide.

Claims2

Dependent claims

A method for recovering scandium, comprising:

adjusting a pH of a solution containing scandium and iron (scandium-containing solution) to a range between −0.5 or more and less than 1;
adding the solution after the pH adjustment to an oxalic acid solution having a pH of between −0.5 and less than 1 to obtain scandium oxalate;
and
roasting the scandium oxalate to convert the scandium oxalate into scandium oxide.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

15/546,038Filed 8 Dec 2015

Priority

JP 2015-0184272 Feb 2015

Published

25 Jan 2018

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

C22B 3/382
Containing phosphorus: phosphine chalcogenides, e.g. compounds of the formula R3P=X with X = O, S, Se or Te
C22B 3/42
Treatment or purification of solutions, e.g. obtained by leaching: by ion-exchange extraction
C22B 3/22
Treatment or purification of solutions, e.g. obtained by leaching: by physical processes, e.g. by filtration, by magnetic means , or by thermal…
C22B 3/44
Treatment or purification of solutions, e.g. obtained by leaching: by chemical processes

Method for recovering scandium

Life of this patent

Method for recovering scandium

Life of this patent

Abstract

Claims2