Method for removing ruthenium from a solution containing platinum group metals

• Main Author: NAGAI, HIFUMI
• Format: Patent
• Language: English; French; German
• Published: 08.09.2010
• Subjects: CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; FERROUS OR NON-FERROUS ALLOYS; INORGANIC CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; SEPARATION; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides an apparatus for effectively removing ruthenium when ruthenium is removed from a solution containing platinum group metal by oxidation distillation. The invention provides an apparatus for selectively removing ruthenium from a solution containing ruthenium and other platinum group metal by adding an oxidizer to the solution to convert ruthenium into ruthenium tetroxide, wherein air is sucked into a reaction tank by reducing pressure within the reaction tank, and at least one outlet of the air is arranged in the apparatus such that the lowermost part thereof is located at the height of 5 - 20m from the bottom of the reaction tank, whereby the solution within the reaction tank can be effectively stirred without ruthenium tetroxide, which has large specific gravity, being concentrated at the bottom of the reaction tank.