Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1983-11-16
1986-09-16
Lone, Werren B.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568725, 568726, 568739, C07C 3702, C07C 3912
Patent
active
046124047
ABSTRACT:
Polychlorinated biphenyls present as contaminants in fluids such as petroleum distillates are effectively removed by reacting with sodium or potassium hydroxide in the presence of or through subsequent filtration through an adsorbent such as alumina and/or diatomaceous earth. A mixture of diatomaceous earth, calcium hydroxide and potassium hydroxide in the ratio of 10/1/1 is exposed to the fluid to be decontaminated by stirring a quantity of the mixture in a quantity of the fluid or by passing the fluid through a column packed with the mixture. Alternatively, the contaminated fluid is mixed with the alkali metal hydroxide and then passed through a column of adsorbent such as activated basic alumina. The fluid may be pretreated by storing in a tank over a bed of potassium hydroxide flakes. Ferric oxide may be added to the reaction mixture to enhance the retention of the octachlorodihydroxybiphenyl on the adsorbent material.
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