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ES148693A1
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A procedure for the preparation of red copper oxide
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ES148692A1
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A procedure for the preparation of copper compounds, applicable to agriculture
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ES146150A1
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A process for the manufacture of copper oxychloride or anticriptogamas containing the same.
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ES141487A1
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A process for the preparation of tin by reduction and treatment of minerals or materials containing tin in metallic, sulphured or oxidized form.
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ES141486A1
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A process for preparing bismuth oxide from minerals containing bismuth.
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ES141488A1
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A process for the preparation of bismuth starting from minerals that contain it.
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ES137470A1
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A process for the preparation of tin oxide by reduction and treatment of minerals or materials containing tin in sulphided or oxidized metal form.
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ES136176A1
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A process for obtaining lead oxisulfate or basic lead sulfate.
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US1928340A
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Treatment of complex cobaltic ores
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ES112348A1
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An electrolytic and catalytic process for the treatment of copper, cobalt and nickel ores.
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ES111889A1
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A process for the production of metal hydroxides by electrolysis and catalysis.
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ES106818A1
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A process for the manufacture of litharge and minium.
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ES106817A1
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An electrolytic process to obtain white lead.
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