C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 34/30 (2006.01) B01D 61/44 (2006.01) C01G 39/00 (2006.01) C01G 41/00 (2006.01) C22B 3/26 (2006.01) C22B 9/05 (2006.01) C25C 1/06 (2006.01)
Patent
CA 2166368
Process for the production of pure tungsten and/or molybdenum solutions from sources, such as alkaline decomposition solutions, which are contaminated with tantalum, niobium, titanium, aluminium, tin, arsenic, phosphorus and/or silicon, by application of a three stage purification process of pH reduction, anion exchange and membrane electrolysis
Gutknecht Wilfried
Mathy Wolfgang
Fetherstonhaugh & Co.
H.c. Starck Gmbh & Co. Kg
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