Canned pressurized gases for dusting and cleaning purposes; Spray cleaners for use on both the person and property of a user comprising various ingredients and propellents including aerosol, nitrogen and carbon dioxide in a canister

CONSTRUCTION OF CHEMICAL PLANTS IN THE FIELD OF THE RECOVERY OF HIGH PURITY AROMATICS FROM HYDROCARBON MIXTURES

CHEMICAL APPARATUS FOR THE EXTRACTION OF PURE BENZENE, PURE TOLUENE, PURE XYLENE GON HYDROCARBON MIXTURES