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Electrochemical Reduction of Hexachlorobenzene in Organic and Aquo-Organic Media with Co(II)Salen as Catalyst

“…This is an indication of the different steps of chlorine removal. In fact, the formation of penta-, tetra-, tri-and dichlorobenzene has been demonstrated with differential-pulse voltammetry [9]. Tetrachlorobenzene, chlorobenzene and lindane can be dehalogenated on graphite -Pd and graphite -Zn cathodes [12].…”

“…The mechanism proposed for the direct reductive dehalogenation of an aromatic molecule [9,10], is represented by:…”

“…The low solubility of halogenated organics in water forces the use of organic solvents such as methanol, dimethyl formamide (DMF), dimethyl sulfoxide (DMSO), and acetonitrile (ACN) for studying the electrochemical transformations of HCB [7,9], tetrahalobenzenes [11] and chlorinated ethylenes [14]. Typical electrode materials include Pb, Hg and carbon.…”

Catalytic reduction of hexachlorobenzene and pentachlorobenzene by cobalt(I) salen electrogenerated at vitreous carbon cathodes in dimethylformamide

“…In parallel studies these workers examined the kinetics of hydrodechlorination of HCB through the use of nickel and palladium-nickel catalysts on carbon [3] and bimetallic (nickel-palladium and copper-palladium) catalysts [4]. Direct electrolytic reduction of HCB at various cathodes, especially lead and mercury, was first studied by Merica and co-workers, who employed both micellar aqueous solutions of Triton-SP 175 and methanol as solvent systems [5][6][7]. In a very recent investigation, both the direct and cobalt(I) salen-catalyzed reductions of HCB were described by Páramo-Garcío et al [8].…”

Mass transfer at gas sparged interface between two immiscible nondispersed liquids in batch and continuous reactors

“…(5) Liquid amalgams which are used as a strong reducing agents for reducing organic [17] and inorganic compounds [18] are produced electrochemically using a mercury pool cathode. (6) Mercury pool cathode is used as an efficient cathode for electrochemical reduction of aqueous organic and inorganic compounds [19][20][21][22] which are difficult to reduce by other efficient solid cathodes such as Zn, Pb and Sn and solid amalgams. Examples of industrial small scale electroorganic synthesis using mercury as a cathode are mentioned elsewhere [20].…”