Purifying salts containing organic pollutants
AssigneeBayer Aktiengesellschaft
InventorsMichael Grosche, Roland Hofer, Arnd Stuwe
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Abstract
A process for purifying organically polluted salts comprising forming a melt of said salts at a temperature of from about 600.degree.to 1000.degree. C., and contacting salt melt with an oxygen-containing gas. Acidic or basic fluxes may be present. The heat to maintain the mass molten may be supplied by electrodes which dip into the melt and which may be hollow so oxygen can be introduced therethrough. A suitable apparatus is also described.
Claims7
A process for removing organics from a sulphate. chloride, phosphate or nitrate salt of an alkali or alkaline earth metal or sludges thereof polluted with about 1 to 70% by weight of organic substances, based on said salt, comprising continuously supplying and forming a melt of said salt at a temperature of from about 600.degree. to 1000.degree. C. by direct electrode resistance heating, contacting said formed melt with an oxygen-containing gas in a plurality of successive stages while advancing the salt through said stages, continuously withdrawing purified salt as a product from the last stage, and continuously withdrawing waste gases.
Dependencies are inferred from the claim text.