... have produced and sold successfully plastic packing rosette ring as used for gas scrubbing for many years. ... 2 , H 2 S, HCl, Cl 2 , HF, NO X , organic solvents Gas stripping: NH 3 , CO 2 , O ... H 2 S, HCl, Cl 2 , HF, NO X elimination, organic solvents recovery Pulp industry: Black/white liquor oxidation ... , trichloroethylene stripping Sewage treatment: Deodorization plastic teller rosette ring