Eniricerche S.p.a.

Consiglio Nazionale Delle Richerche

Nuova Samim S.p.a.

Samim Societa Azionaria Minero Metallurgica S.p.a.

Agostino Baradel

Renato Guerriero

Giuseppe Veronese

Andrea Robertiello

Mario Valdiserri

Gino Della Penna

Silvio Gulinelli

Luigi Rivola

Process for the treatment of aqueous effluents from the production of epoxy resins, which effluents contain as their main impurities chlorohydrins, glycidol, isopropyl alcohol and sodium chloride, which process comprises the following steps:

Treatment of the effluents from the production of epoxy resins

Process for separating arsenic from acid solutions which contain it

A process for the selective extraction of arsenic from acid solutions containing other metals comprising treating the solutions with polyhydroxybenzene derivatives in organic diluent; mono- and di- alkyl derivatives containing at least four alkyl carbon atoms of pyrocatechol and pyrogallic acid are particularly contemplated for use in the removal of arsenic from strongly acid copper-containing electrolyte solutions.

Process for separating arsenic from acid solutions containing it

Process for the separation of arsenic from acid aqueous solutions containing arsenic and other metals characterized in that the acid aqueous solution is placed in the contact with water-immiscible organic solvent which extracts the arsenic, the arsenic being reextracted from the organic solvent by means of a countersolvent.

Process for the separation of arsenic from acid solutions containing it

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San Donato Milanese, Italy

Agostino Baradel