... most acids, saline solutions and organic solvents, liquid or gas covering the complete acid,neutral and alkali range up ... of petrochemical industry,separation of acid mist,high temperature dusty gas in environmental protection industry; e:Filtration of fertilizer industry ... ,e.g.mixed gas filtration for HNO3 synthesis;methane,sludge gas,bio gas;f: Filtration of sands from various ...