Method for removal of halides from gases

Claim 1

THE METHOD OF REMOVING HALIDE GASES PRESENT IN LOW CONCENTRATIONS IN OTHER GASEOUS MEDIUM COMPRISING THE STEPS OF INTRODUCING A DRY SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF LIMESTONE, CALCIUM CARBONATE, SLAKED LIME, BURNT LIME, ALUMINA, ACTIVATED ALUMINA AND MAGNESIA IN FINELY DIVIDED FORM FOR SUSPENSION INTO THE CONTAMINATED GASEOUS MEDIUM, PASSING THE CONTAMINATED GASEOUS MEDIUM WITH THE PARTICULATE SUBSTANCE SUSPENDED THEREIN THROUGH A FILTER SURFACE HAVING A PERMENABLE LAYER OF THE PARTICULATE SUBSTANCE BUILT UP THEREON BY FILTRATION OF PARTICULATE SUBSTANCE FROM THE GASEOUS MEDIUM PASSING THERETHOUGH WHEREBY THE PARTICULATE SUBSTANCE SUSPENDED IN THE GASEOUS MEDIUM SEPERATE OUT ON THE FORMED LAYER TO ADD TO THE THICKNESS THEREOF WHILE THE CONTAMINATED GASEOUS MEDIUM CONTINUES TO PASS THROUGH THE SOMPOSITE LAYER ENTIMATELY TO ENGAGE THE DRY PARTICULATE SUBSTANCE FOR SEPARATION OF HALIDES FROM THE AIR AND TO HOLD THE BUILT-UP LAYER OF PARTICULATE SUBSTANCE ON THE FILTER SURFACE.