发明名称 |
SAETT ATT RENA ZINKSULFATLOESNINGAR ERHAOLLNA GENOM LAKNING AV ZINKMALMER |
摘要 |
<p>1393606 Zinc sulphate purification SOC DES MINES ET FONDERIES DE ZINC DE LA VIEILLE MONTAGNE SA 27 July 1972 [16 May 1972] 35144/72 Heading C1A [Also in Division C7] Zinc sulphate solution is purified by: (1) coprecipitating hydrolysable impurities with Fe(OH) 3 ; (2) adding zinc to remove Cu and Cd by cementation; (3) heating to between 80‹ C. and the boiling point; and (4) adding antimony or an antimony compound and zinc powder to cement Co. The preferred antimony compound is Sb 2 O 3 and the zinc powder may contain 0À5-2% by weight of lead. A lead salt (preferably lead sulphate) may be added with the antimony compound or before the zinc powder. Zinc may be produced from the purified solution by electrolysis.</p> |
申请公布号 |
FI55358(B) |
申请公布日期 |
1979.03.30 |
申请号 |
FI19720001752 |
申请日期 |
1972.06.20 |
申请人 |
S DES MINES ET FONDERIES DE ZINC DE LA VIEILLE MONT SA |
发明人 |
BODSON FERNAND |
分类号 |
C22B19/00;C01G9/06;C22B19/20;C25C1/16;(IPC1-7):C22B19/26 |
主分类号 |
C22B19/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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