Process for recovering and re-using cobalt and tungsten from...

Details Process for recovering and re-using cobalt and tungsten from... Process for recovering and re-using cobalt and tungsten from...

C - Chemistry, Metallurgy

22

B

C22B 34/36 (2006.01) B01J 31/40 (2006.01) C02F 1/52 (2006.01) C02F 1/58 (2006.01) C22B 3/44 (2006.01) C22B 23/02 (2006.01)

Patent

CA 2141892

Process for recovering and re-using cobalt and tungsten from reaction liquors, in which said reaction liquors are treated: a) With an alkali-earth metal hydroxide in order to precipi- tate cobalt and tungsten, and the resulting precipitate is subsequently treated with a strong mineral acid in order to be able to dissolve the cobalt salt and separ- ate it from H2WO4 precipitate; or b) With an alkali metal hydroxide in order to precipitate and separate Co(OH)2, and the resulting alkaline solution is then treated with an alkali-earth metal compound which is filtered and treated with a strong mineral acid in order to obtain H2WO4

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