Apparatus for removing nitrogen trichloride from chlorine gas
AssigneeBASF Wyandotte Corporation
InventorsEdward N. Balko, Shyam D. Argade
Life of this patent
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Abstract
In a process for making chlorine electrolytically in which a build-up of nitrogen trichloride occurs in the bottoms of cooling apparatus, a method and apparatus is provided wherein the nitrogen trichloride is dissolved in an organic solvent such as carbon tetrachloride, the chlorine removed, and the solution treated to destroy the otherwise hazardous nitrogen trichloride. The solvent is then separated and recycled to avoid environmentally undesirable waste products.
Claims9
An apparatus for removing and destroying nitrogen trichloride contaminant present in chlorine produced electrolytically from brine comprising
- an extraction device for receiving chlorine containing accumulations of nitrogen trichloride,
- means for moving said contaminated chlorine and nitrogen trichloride to said extraction device,
- means for adding an inert organic solvent to said extraction device in an amount sufficient to provide a safely diluted solution of nitrogen trichloride therein,
- means for heating the extraction device to remove substantially all of the chlorine therefrom,
- reactor means,
- means for discharging chlorine from said extraction device,
- means for moving the diluted solution of nitrogen trichloride from the extraction device to the reactor means,
- means for adding a reaction component said reactor to react with nitrogen trichloride and to convert it to ammonium chloride,
- means for discharging chlorine formed in said reactor,
- means for removing the reaction mixture from said reactor, means for separating the solvent from the reaction mixture, removed from the reactor, after the conversion of the nitrogen trichloride, and
- means for recycling the separated solvent from said reactor to the extraction device.
Dependencies are inferred from the claim text.