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ES28932A1901-12-131901-12-13Mejoras en el procedimiento para el tratamiento de minerales de cobre por medio del aparato que se describe.
ExpiredES28932A1
(es)
Mejoras en el procedimiento químico para la separación de substancias minerales por la acción selectora de aceites y demás substancias análogas por medio del aparato que se describe.
Un procedimiento químico perfeccionado para separar los componentes metálicos de los pedregosos en los minerales, por medio de los aparatos que se describen.