Verfahren zum Wiederaufloesen einer Dispersion unter Anwendung elektrischer Erscheinungen

摘要

Dispersions, for example oil-water dispersions, are resolved by contacting the dispersion with at least two different solids in divided form at the same time, at least two of the solids having under the prevailing conditions a relative electrode potential of at least 1 volt, the several phases being subsequently separated from the solids. The solid particles may be in the form of a bed. The particles may be in the form of at least two different classes of particles of which one may be a metal such as iron or aluminium or iron oxide, and another may be a non-metal such as carbon. At least some of the particles may be such that the surface consists of at least two of the different solids, for example by impregnating one solid with another, or with a compound which will decompose to yield the other solid, for example, carbon impregnated with iron, which may be prepared by impregnating with ferric nitrate and reducing. Alternatively, they may be formed by electrolytically depositing one of the solids on to the surface of particles of one of the other solids, and then abrading so that both solids are exposed. Thus, the particles may consist of copper and aluminium or iron.ALSO:Particles for resolving dispersions may be prepared by electrolytically depositing a solid on to particles of a different solid having a relative electrode potential of at least 1 volt, and then abrading so that both solids are exposed. In an example, aluminium granules are plated with copper, using an aqueous solution comprising about 45 grams copper cyanide, 67.5 grams sodium cyanide, 60 grams Rochelle salt, and about 15 grams caustic potash per litre. Reference is also made to abraded particles comprising iron plated with copper.ALSO:Dispersions, for example oil-water dispersions, are resolved by contacting the dispersion with at least two different solids in divided form at the same time, at least two of the solids having under the prevailing conditions a relative electrode potential of at least 1 volt, the several phases being subsequently separated from the solids. The solid particles may be in the form of a bed. The particles may be in the form of at least two different classes of particles of which one may be a metal such as iron or aluminium or iron oxide, and another may be a non-metal such as carbon. At least some of the particles may be such that the surface consists of at least two of the different solids, for example by impregnating one solid with another, or with a compound which will decompose to yield the other solid, for example, carbon impregnated with iron, which may be prepared by impregnating with ferric nitrate and reducing. Alternatively, they may be formed by electrolytically depositing one of the solids on to the surface of particles of one of the other solids, and then abrading so that both solids are exposed. Thus, the particles may consist of copper and aluminium or iron.