Direct electrochemical reduction of nitric acid to hydroxylamine

Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C25B 100

Patent

active

048490733

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.

REFERENCES:
patent: 727025 (1903-05-01), Tafel
patent: 2242477 (1941-05-01), Osswald et al.
Bathia, M. L., and A. P. Watkinson, The Canadian Journal of Chemical Engineering, "Hydroxylamine Production by Electroreduction of Nitric Oxide in a Trickle Bed", vol. 57, Oct., 1979, pp. 631-637.
Chem. Abs. 44/6751e; Lazzari, Giacomo, Proc. Intern. Congr. Pure and Applied Chem., "The Electrolytic Preparation of Hydroxylamine", (London) 11, 177-188, (1974; in Italian).
Chem. Abs. 68/43114v; Masek, J., Fresenius', Z. Anal. Chem., "Polarographic Reduction of the NO.degree., Group", 224 (1), 99-107, (1967), (English).
Chem. Abs. 75/14187b; Savodnik, N. N., Shepelin, V. A., Zalkind, Ts. I., Elektrokhimiya, "Synthesis of Hydroxylamine on Platinum. I. Electrochemical Reduction of Nitric Oxide on a Platinum Electrode", 1971, 7(3), 424-427, (Russ.).
Chem. Abs. 75/14188c; Savodnik, N. N.; Shepelin, V. A.; Zalkind, Ts. I., Elektrokhimiya, "Synthesis of Hydroxylamine on Platinum. II. Interaction of Nitric Oxide and Hydrogen on Platinum", 1971, 7 (4), 583-585, (Russ.).
Chem. Abs. 80/151992c; Shepelin, V. A., Zh. Prikl. Khim. (Leningrad), "Selection of a Model for a New Method of Hydroxylamine Preparation", 1974, 47 (4), 713-716, (Russ.).
Chem. Abs. 86/48482m; J. J. L. Janssen, Electrochim. Acta, "Reduction of Nitric Oxide at a Flow-Through Mercury Plated Nickel Electrode", 1976, 21 (10), 811-815, (Eng.).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Direct electrochemical reduction of nitric acid to hydroxylamine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Direct electrochemical reduction of nitric acid to hydroxylamine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct electrochemical reduction of nitric acid to hydroxylamine will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-169564

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.