Patent ID: 6325841
Filing Date: 2001-12-04
Classification: B01D,B01J,Y10S

Abstract:
A process for cleaning a halogen-based gas containing exhaust gas, comprising:contacting an exhaust gas containing a halogen-based gas as noxious component with a cleaning agent comprising activated carbon adherently added with an alkali metal formate and/or an alkaline earth metal formate;wherein the halogen-based gas is at least one gas selected from the group consisting of fluorine, chlorine, bromine, iodine, hydrogen fluoride, hydrogen bromide, hydrogen iodide, chlorine trifluoride, boron trifluoride, boron trichloride, silicon tetrafluoride, silicon tetrachloride, titanium tetrachloride, aluminum chloride, germanium tetrafluoride and tungsten hexafluoride.