Ronald K Dotson

US Patent:

48511250, Jul 25, 1989

Filed:

Apr 11, 1988

Appl. No.:

7/179944

Inventors:

Ronald L. Dotson - Cheshire CT
Robert T. Brooker - Watertown CT

Assignee:

Olin Corporation - Cheshire CT

International Classification:

B01D 1300

US Classification:

210638

Abstract:

Concentrated solutions of inorganic hydroxylammonium salts can safely be produced in a process for concentrating a dilute solution of an inorganic hydroxylammonium salt by contact with a membrane having a sorption side and a desorption side. The process comprises contacting the dilute solution with the sorption side of a membrane, which is substantially permeable to the solvent and substantially impermeable to the solute of the solution, to sorb the solvent and permit the solvent to flow through the membrane to the desorption side. Desorbing the solvent from the desorption side of the membrane. Highly concentrated aqueous solutions of hydroxylammonium salts which are heat sensitive are produced by the novel process of the invention which does not require directly heating the solution and is substantially free of hazards.

US Patent:

48490733, Jul 18, 1989

Filed:

Nov 5, 1987

Appl. No.:

7/117711

Inventors:

Ronald L. Dotson - Cheshire CT
Debra Y. Hernandez - Boston MA

Assignee:

Olin Corporation - Cheshire CT

International Classification:

C25B 100

US Classification:

204101

Abstract:

A solution of hydroxylamine nitrate is electrolytically produced in an electrochemical cell having a cathode compartment, an anode compartment, and a separator between the cathode compartment and the anode compartment. The process comprises feeding a catholyte consisting essentially of an aqueous nitric acid solution to the cathode compartment. An anolyte solution is fed to the anode compartment. The catholyte is electrolyzed while maintaining the cathodic reaction temperature below about 50. degree. C. and a cathode half-cell potential at from about -0. 5 to about -3 volts to produce a hydroxylamine nitrate solution which is recovered from the cathode compartment. The novel process of the present invention directly produces highly concentrated hydroxylamine nitrate solutions of high purity, i. e. , suitable for use in a monopropellant.

US Patent:

49683942, Nov 6, 1990

Filed:

Jul 5, 1989

Appl. No.:

7/375766

Inventors:

Ronald L. Dotson - Cheshire CT
Debra Y. Hernandez - Boston MA
Ronald A. Sasse - Baltimore MD

Assignee:

Olin Corporation - Cheshire CT

International Classification:

C25B 100
B01J 4100
C01B 21087

US Classification:

204101

Abstract:

A process for reducing excess nitric acid in an aqueous hydroxylamine nitrate solution. The process is conducted by reacting the aqueous hydroxylamine nitrate solution with a basic neutralizing agent such as nitric oxide, hydroxylamine vapor or a mixture thereof or by contacting the aqueous hydroxylamine nitrate solution with an anion exchange resin having a pKa in the range of from about 5 to about 9. The aqueous hydroxylamine nitrate solution may be produced by the electrolysis of nitric acid.