... against most acids, saline solutions and organic solvents, liquid or gas covering the complete acid,neutral and alkali range up to ... process water; d: Filtration of gases:e.g. compressed gas from air compressor,high pressure sterile air,steam,catalysis air ... Filtration of fertilizer industry,e.g.mixed gas filtration for HNO3 synthesis;methane,sludge gas,bio gas;f: Filtration of sands from various kinds ...