C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/241
C10G 21/02 (2006.01) C10G 21/00 (2006.01) C10G 21/18 (2006.01) C10G 21/20 (2006.01) C10G 21/28 (2006.01)
Patent
CA 1186652
ABSTRACT OF THE DISCLOSURE A process for removing halogenated aliphatic and aromatic compounds, e.g., polychlorinated biphenyls, from petroleum products by solvent extraction. The halogenated aliphatic and aromatic compounds are extracted from a petroleum product into, a polar solvent by contacting the petroleum product with the polar solvent. The polar solvent is characterized by a high solubility for the extracted halogenated aliphatic and aromatic compounds, a low solubility for the petroleum product and considerable solvent power for polyhydroxy compound. The preferred polar solvent is dimethyl- formamide. A miscible compound, such as, water or a polyhydroxy compound, is added to the polar extraction solvent to increase the polarity of the polar extract- ion solvent. The halogenated aliphatic and aromatic compounds are extracted from the highly-polarized mixture of water or polyhydroxy compound and polar extraction solvent into a low polar or nonpolar solvent by contacting the water or polyhydroxy compound-polar solvent mixture with the low polar or nonpolar solvent. the halogenated aliphatic and aromatic compounds and the low polar or nonpolar solvent are separated by physical means, e,g., vacuum evaporation. The polar and nonpolar solvents are recovered from recycling.
424138
Googin John M.
Napier John M.
Travaglini Michael A.
Meredith & Finlayson
The Government Of The United States As Represented By The United
LandOfFree
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