... chloride,Soduim Acetate,ammonia water,Caustic soda,concentrated sulphuric acid,aluminium hydroxide; b:Filtration of catalyst and decoloration liquids ... air,steam,catalysis air of petrochemical industry,separation of acid mist,high temperature dusty gas in environmental protection industry; ... .mixed gas filtration for HNO3 synthesis;methane,sludge gas,bio gas;f: Filtration of sands from various kinds of ...