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US 5,326,467 AGranted
Recovering polychlorinated biphenyls from solution
AssigneeTexaco Inc.
InventorsRobert G. Shong, Robert L. Horton
Life of this patent
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Abstract
A method of recovering polychlorinated biphenyls from solution, which comprises a multi-step method of mixing and reacting an alkali metal or alkaline earth hydroxide in glycol solution with polychlorinated biphenyls in non-aqueous solvent to form biphenyl phenoxy-type anions, separating the glycol solution containing biphenyl phenoxy-type anions from the non-aqueous solvent, and separating the biphenyl phenoxy-type anions from the glycol solution.
Claims10
A method of recovering polychlorinated biphenyls from solution, which comprises:
- mixing and reacting an alkali metal or alkaline earth hydroxide in glycol solution with polychlorinated biphenyls in non-aqueous solvent to form biphenyl phenoxy anions;
- separating the glycol solution containing biphenyl phenoxy anions from the non-aqueous solvent;
- and
- separating the biphenyl phenoxy anions from the glycol solution by mixing and reacting polydimethyldiallyl ammonium hydroxide with said anions to precipitate said anions from glycol solution.
1 more element
A method of recovering polychlorinated biphenyls from solution, which comprises:
- mixing and reacting sodium hydroxide in glycol solution with polychlorinated biphenyls in toluene to form biphenyl phenom anions;
- separating the glycol solution containing biphenyl phenoxy anions from the toluene;
- and
- mixing and reacting polydimethyldially ammonium hydroxide with said anions to precipitate said anions from glycol solution.
1 more element
Dependencies are inferred from the claim text.