Julian Francis Watson

US Patent:

54096804, Apr 25, 1995

Filed:

Mar 18, 1994

Appl. No.:

8/214534

Inventors:

Jerry J. Kaczur - Cleveland TN
David W. Cawlfield - Cleveland TN
Julian F. Watson - Delano TN

Assignee:

Olin Corporation - Stamford CT

International Classification:

C01F 100

US Classification:

423157

Abstract:

A process for removing alkaline earth metal impurities (e. g. calcium and magnesium ions) from an aqueous alkali metal chlorate solution which includes adding sufficient alkali metal carbonate or hydroxide or both to the impure solution to raise the pH to above 9 and form alkaline earth metal precipitates which are then removed from the pH-adjusted solution (e. g. by microfiltration). This process can lower the level of these impurities from about 1-20 ppm to less than about 0. 3 ppm or less.

US Patent:

52425541, Sep 7, 1993

Filed:

Oct 8, 1992

Appl. No.:

7/958371

Inventors:

Jerry J. Kaczur - Cleveland TN
David W. Cawlfield - Cleveland TN
Julian F. Watson - Delano TN
Cortie J. Rolison - Cleveland TN
Sudhir K. Mendiratta - Cleveland TN
Robert T. Brooker - Cleveland TN

Assignee:

Olin Corporation - Cheshire CT

International Classification:

C35B 114
C01B 1102

US Classification:

204 95

Abstract:

An aqueous solution of chloric acid and alkali metal chlorate is produced in an electrolytic cell having an anode compartment, a cathode compartment, and at least one ion exchange compartment between the anode compartment and the cathode compartment, in a process which comprises: a) feeding an aqueous solution of an alkali metal chlorate to the ion exchange compartment, b) passing hydrogen and alkali metal ions from the anode compartment through a cation exchange membrane into the ion exchange compartment, wherein the hydrogen ions displace alkali metal ions to produce an aqueous solution of chloric acid and alkali metal chlorate, c) passing alkali metal ions from the ion exchange compartment into the cathode compartment, d) electrolyzing the aqueous solution of chloric acid and alkali metal chlorate in the anode compartment to produce an aqueous solution of chloric acid, alkali metal chlorate, hydrogen ions and perchlorate ions as a minor constituent. The aqueous solution of chloric acid, alkali metal chlorate and perchlorate ions is reacted with a reducing agent in a chlorine dioxide generator to produce chlorine dioxide.

US Patent:

52982807, Mar 29, 1994

Filed:

Aug 1, 1991

Appl. No.:

7/739041

Inventors:

Jerry J. Kaczur - Cleveland TN
David W. Cawlfield - Cleveland TN
Julian F. Watson - Delano TN

Assignee:

Olin Corporation - Cheshire CT

International Classification:

B05D 512

US Classification:

427125

Abstract:

A process for fabricating a porous, high surface area electrode and the use of that electrode in an electrolytic cell for manufacturing chlorine-free chlorine dioxide from dilute alkali metal chlorite solutions in a single step is disclosed. The electrolytic cell uses a porous flow-through anode and a cathode separated by a suitable separator.