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Title: Large-scale production of anhydrous nitric acid and nitric acid solutions of dinitrogen pentoxide

Abstract

A method and apparatus are disclosed for a large scale, electrochemical production of anhydrous nitric acid and N.sub.2 O.sub.5. The method includes oxidizing a solution of N.sub.2 O.sub.4 /aqueous-HNO.sub.3 at the anode, while reducing aqueous HNO.sub.3 at the cathode, in a flow electrolyzer constructed of special materials. N.sub.2 O.sub.4 is produced at the cathode and may be separated and recycled as a feedstock for use in the anolyte. The process is controlled by regulating the electrolysis current until the desired products are obtained. The chemical compositions of the anolyte and catholyte are monitored by measurement of the solution density and the concentrations of N.sub.2 O.sub.4.

Inventors:
 [1];  [2];  [3];  [4]
  1. (Castro Valley, CA)
  2. (Oakland, CA)
  3. (Livermore, CA)
  4. (Brentwood, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
873598
Patent Number(s):
6200456
Assignee:
United States of America as represented by Department of Energy (Washington, DC) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
large-scale; production; anhydrous; nitric; acid; solutions; dinitrogen; pentoxide; method; apparatus; disclosed; scale; electrochemical; oxidizing; solution; aqueous-hno; anode; reducing; aqueous; hno; cathode; flow; electrolyzer; constructed; special; materials; produced; separated; recycled; feedstock; anolyte; process; controlled; regulating; electrolysis; current; desired; products; obtained; chemical; compositions; catholyte; monitored; measurement; density; concentrations; chemical compositions; aqueous hno; acid solutions; chemical composition; acid solution; nitric acid; desired product; reducing aqueous; chemical product; anhydrous nitric; /205/

Citation Formats

Harrar, Jackson E., Quong, Roland, Rigdon, Lester P., and McGuire, Raymond R. Large-scale production of anhydrous nitric acid and nitric acid solutions of dinitrogen pentoxide. United States: N. p., 2001. Web.
Harrar, Jackson E., Quong, Roland, Rigdon, Lester P., & McGuire, Raymond R. Large-scale production of anhydrous nitric acid and nitric acid solutions of dinitrogen pentoxide. United States.
Harrar, Jackson E., Quong, Roland, Rigdon, Lester P., and McGuire, Raymond R. Mon . "Large-scale production of anhydrous nitric acid and nitric acid solutions of dinitrogen pentoxide". United States. https://www.osti.gov/servlets/purl/873598.
@article{osti_873598,
title = {Large-scale production of anhydrous nitric acid and nitric acid solutions of dinitrogen pentoxide},
author = {Harrar, Jackson E. and Quong, Roland and Rigdon, Lester P. and McGuire, Raymond R.},
abstractNote = {A method and apparatus are disclosed for a large scale, electrochemical production of anhydrous nitric acid and N.sub.2 O.sub.5. The method includes oxidizing a solution of N.sub.2 O.sub.4 /aqueous-HNO.sub.3 at the anode, while reducing aqueous HNO.sub.3 at the cathode, in a flow electrolyzer constructed of special materials. N.sub.2 O.sub.4 is produced at the cathode and may be separated and recycled as a feedstock for use in the anolyte. The process is controlled by regulating the electrolysis current until the desired products are obtained. The chemical compositions of the anolyte and catholyte are monitored by measurement of the solution density and the concentrations of N.sub.2 O.sub.4.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}

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