PROCESS TO REMOVE METAL SPECIES FROM EXHAUST VAPORS

摘要

A contaminated vapour stream, e.g. a tin-compound containing exhaust from a glass coating facility, is contacted with an acidic aqueous absorbing medium, preferably pH less than 2.5, which already contains some of the compound to be removed. Formation of precipitate is avoided. Contacting may be in one or more scrubber beds. The removed metal-containing species may be recovered from the absorbing medium for re-use.