Method of treating toxic aromatic halogen-containing compounds by electrophilic aromatic substitution

• Main Authors: HALPERN; YUVAL, FRIEDMAN; ARTHUR J
• Format: Patent
• Language: English
• Published: 01.03.1994
• Edition: 5
• Subjects: CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS; CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING ORPROTECTING AGAINST HARMFUL CHEMICAL AGENTS; FIRE-FIGHTING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HUMAN NECESSITIES; LIFE-SAVING; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS

An improved method for detoxifying waste materials contaminated with halogenated aromatic hydrocarbons is disclosed. The method provides for detoxification of halogenated aromatic compounds by electrophilic aromatic substitution. The method also provides for the dehalogenation of the lower congeners of such halogenated aromatic compounds, as a result of chemical activation via electrophilic aromatic substitution, followed by nucleophilic aromatic dehalogenation. In addition, the method provides for the more complete dehalogenation of mixtures of halogenated aromatic compounds that contain both higher and lower congeners by increasing the efficiency of dehalogenation of the lower congeners.