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- W1999356507 abstract "Hydrodechlorination of 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), pentachlorophenol (PCP), and p-chlorobenzoic acid with hydrogen gas over 5% Pd/C or Raney-Ni was studied in different liquid phase systems: (1) ethanol or ethanol–aqueous KOH; (2) in the multiphase system, composed by an organic phase and aqueous KOH and containing a quaternary ammonium salt (Aliquat 336). Under mild conditions (50 °C and atmospheric pressure of hydrogen) quantitative hydrodechlorination of 2,4,5-T is achieved in 1–4 h over Raney-Ni or Pd/C in the multiphase system or in the ethanol–aqueous KOH solution. PCP reacts selectively giving the dechlorinated phenolate in several hours in the system made of aqueous KOH (with Raney-Ni or Pd/C) or in several minutes in the presence of a small amount of Aliquat 336 solution in isooctane (1–4 molar% of Aliquat 336), where Aliquat 336 promotes the phase-transfer of polychlorinated anion. The reaction rates versus conditions, process localization, and the role of the ionic liquid environment are discussed." @default.
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- W1999356507 date "2005-01-01" @default.
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- W1999356507 title "Phase-transfer promotion of hydrodechlorination of chlorophenoxy-pesticides over Pd/C and Raney-Ni" @default.
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- W1999356507 doi "https://doi.org/10.1016/j.apcatb.2004.06.016" @default.
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