Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1997-03-24
1999-11-16
Kumar, Shailendra
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
134 42, 2082621, 2082625, 210909, 405128, 568671, 568672, 568679, 568840, C07C 4313
Patent
active
059861479
ABSTRACT:
A method and apparatus is provides for decontamination of soil from contaminates such as polychlorinated biphenyls. The method involves (a) admixing a short chain alcohol and a ethoxylated alcohol to provide a solvent composition, (b) admixing the solvent composition with the contaminated soil to extract the contaminant from the soil into the solvent to form contaminated solvent, (c) separating the soil from the contaminated solvent, (d) washing of the decontaminated soil with water to remove residual solvent from the soil, and (e) distillation of the contaminated solvent to separate the reusable short chain alcohol as a light fraction from a heavy fraction containing the ethoxylated alcohol and the contaminant. The apparatus includes (a) a mixer for mixing the soil and solvent, (b) a centrifuge for separating fines from decanted contaminated solvent, (c) a distillation unit for separating the solvent into a reusable light fraction and a waste heavy fraction, and (d) a water reclamation unit for removing residual solvent from the wash water. The method and apparatus are usable for reclaiming contaminated soils.
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Blackmon Robert N.
Kumar Shailendra
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