John L Stubbs

US Patent:

45379378, Aug 27, 1985

Filed:

Feb 13, 1984

Appl. No.:

6/579233

Inventors:

David W. Cawlfield - Cleveland TN
William M. Moore - Cleveland TN
John L. Stubbs - Cleveland TN

Assignee:

Olin Corporation - Cheshire CT

International Classification:

C08L 7900

US Classification:

525417

Abstract:

A resin chelating agent and process for making it are disclosed. The process comprises reacting the crosslinked product formed from the reaction of an aqueous suspension of a polyethyleneimine with a polycarboxylic acid with a mixture of a caustic agent comprising an alkali metal or alkaline earth metal hydroxide and carbon bisulfide to produce the finished resin. The resin can be produced in both head and powder form and is capable of selectively removing a large number of metallic contaminants from process and waste water streams. It is also essentially insensitive to the presence of alkali metal and alkaline earth metal ions dissolved in said streams.

US Patent:

51124521, May 12, 1992

Filed:

Jul 22, 1991

Appl. No.:

7/734362

Inventors:

John L. Stubbs - Cleveland TN
Roger E. Bolick - Chattanooga TN
Everett F. Hauser - Chattanooga TN

Assignee:

Olin Corporation - Cheshire CT

International Classification:

C25B 114

US Classification:

204 92

Abstract:

A process for treating an alkali metal hydrosulfite solution containing thiosulfate ions as an impurity which comprises reducing cathodically the alkali metal hydrosulfite solution to convert thiosulfate ions to sulfide ions, the alkali metal hydrosulfite solution having a residual alkalinity of from about 0. 1 to about 20 grams per liter of hydroxide ion.