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AssigneeOlin Corporation
InventorsSanders H. Moore, Maurice R. Smith, Harvey B. Cochran
Estimating the term…
An improved process for treating aqueous effluents and purge streams to selectively remove polluting elements such as iron, copper, lead and mercury therefrom is described. The procedure comprises contacting the effluent with a poly(dithiocarbamate) chelating agent whereby the polluting elements are absorbed. The resin is extracted with an acidic aqueous solution having a pH of from about 4 to about 6; and removing the resin. When this is done, the residual content of these polluting elements in the effluent is reduced to a level below EPA required levels so that the effluent can safely be discharged into the surrounding ecosystem. The poly(dithiocarbamate) resin containing the polluting elements can be disposed of, for example, by being deposited in an unsecured landfill.
A process for purifying an aqueous effluent containing at least one polluting element dissolved therein which comprises:
A process for removing beryllium from an aqueous effluent which comprises contacting the aqueous effluent with a poly(dithiocarbamate) chelating resin having a sulfur content of from about 6 to about 7 percent.
A process for removing aluminum from an aqueous effluent having a pH in the range of from about 6 to about 9 which comprises contacting the aqueous effluent with a poly(dithiocarbamate) chelating resin having a sulfur content of from about 6 to about 7 percent.
A process for removing silicon from an aqueous effluent having a pH in the range of from about 2 to about 6 which comprises contacting the aqueous effluent with a poly(dithiocarbamate) chelating resin having a sulfur content of from about 6 to about 7 percent.
Dependencies are inferred from the claim text.