Consiglio Nazionale Delle Ricerche

Vittorio Alesse

Giorgio Bornengo

Anna M Marabini

Filippo M Carlini

Thomas Meloy

Fabrizio Bergamini

Pei C Huang

Maria A Marabini

2-mercapto-benzoxazole derivatives as collectors for the selective

The present invention relates to a process for separating and recovering copper wires, lead grains coming and rubber grains coming from waste cables, through washing, gravimetric separation, screening and by flattening the lead grains thereby facilitating their ready recovery.

Process for separating and recovering lead, rubber and copper wires from

A process for the selective flotation of metal ores is described, wherein ionic organic collectors are utilized, which have the formula: ##STR1## where R and R.sub.1, like or different from each other, represent: H, a halogen, a straight or branched C.sub.1-9 alkyl group, an alkoxyl or hydroxyalkyl group in which the alkyl moiety contains from 1 to 9 carbon atoms, or a phenyl group; and M represents: H, Na, K, Li, Cs, NH.sub.4.

Process for the selective flotation of metal ores using

Ionic organic collecting agents for the selective flotation of lead and zinc ores, said agents having the following general formula ##STR1## wherein the symbols employed have the meaning given below: R represents H, CH.sub.3, C.sub.2 H.sub.5, or an alkoxyalkyl group,

Collecting agents for the selective flotation of lead and zinc ores and

Organic ionic collecting agents for the selective flotation of lead and zinc ores, said agents having the following general formula: ##STR1## wherein the symbols have the following meanings: R represents an alkoxyl group having from 3 to 12 carbon atoms;

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Rome, Italy

Vittorio Alesse