Abstract: A process and apparatus for treating a gas containing a metal halide or an organo substituted metal halide which is drawn into a recovery chamber and is decomposed to a metal precipitate and hydrogen halide by reaction with a warm water spray. Gaseous hydrogen halide is then subjected to a cold water spray to reduce the hydrogen halide gas to an acid which is diluted and discarded as an effluent. The treated gas which is finally discarded to the environment contains substantially no metal halides or organo substituted metal halides and only a minimal concentration of hydrogen halide gas. Metal recovery is enhanced by controlling the pH of the metal oxide and the collected warm water spray and the metal precipitate which is collected in the recovery chamber.

Abstract: The process and apparatus for removing metal halide gases from overspray generated during hot-end glass coating operations is disclosed. The excess metal halide gas is drawn into a recovery chamber in which it is decomposed to a metal oxide and a hydrogen halide gas by reaction with a warm water spray. The hydrogen halide gas is then subjected toa cold water spray to reduce the hydrogen halide gas to an acid which is diluted and discarded as an effluent. The treated overspray gas which is finally discarded to the environment contains substantially no metal halides and only a minimal concentration of hydrogen halide gas.