China Precious Metal Refining Technology And Equipment Leading Brand
Detailed News
Chemical Purification of Ruthenium

     

Raw materials for ruthenium purification are mainly crude ruthenium and ruthenium-containing salt solutions obtained by distillation separation. Crude ruthenium is usually converted into solution using the alkali fusion-water leaching method. The primary goal of ruthenium purification is to remove osmium, an impurity with similar properties.

Transfer the ruthenium solution into a clean glass or glass-lined distillation kettle, and connect the exhaust pipe to an osmium absorption bottle filled with a 20% NaOH-3% ethanol solution as the osmium absorbent. Heat to boil for 40-50 minutes; osmium volatilizes as OsO₄ (osmium tetroxide) and is absorbed until a thiourea cotton ball test shows no red color. Then add a certain amount of hydrogen peroxide to continue oxidizing and volatilizing residual osmium.

Concentrate the osmium-removed ruthenium solution by heating to a ruthenium content of approximately 30 g/L. Add solid ammonium chloride while the solution is hot to form a dark red precipitate of ammonium hexachlororuthenate ((NH₄)₂RuCl₆). After cooling and filtration, wash the filter cake with anhydrous ethanol until the filtrate becomes colorless. The washed cake is dried, calcined, and reduced with hydrogen to produce sponge ruthenium with a ruthenium content of 98%-99%.

+8613303827570
Related Product
Related Video
Product Center
Related Cases
Contact Us
We'll get in touch with you right away to provide detailed product info and tech insights sincerely.