Removal of organic material from recycle nitric acid by ozone
Organic compounds can be removed from recycle nitric acid (e.g., 2.5 to 10 M HNO/sub 3/) by ozonation. In the absence of catalysts the removal of acetic acid, one of the most resistant of the aliphatic species, was found to be slower than its removal from distilled water under similar conditions. At 95/sup 0/C, about 8 h was required to reduce the carbon content of a 10 M HNO/sub 3/ solution from 100 to 10 ..mu..g/m1 in the absence of catalysts. However, the same reduction was accomplished in only about 1 h when silver ion was added at a concentration of 50 mg/liter. Silver ion (Ag/sup +/) is the nmost effective of the catalysts tested for removal of acetic acid from 2.5 to 10 M HNO/sub 3/ by ozonation. Other, less efficient, catalysts include Pd/sup 2 +/, Mn/sup 2 +/, Fe/sup 3 +/, and silica gel. The initial stages of the reaction in nitric acid appear to be first order with respect to the acetic acid conentration when no catalyst is present. Average rate constants are 1.75 x 10/sup -5/ s/sup -1/ at 75/sup 0/C, 4.50 x 10/sup -5/ s/sup -1/ at 85/sup 0/C, and 1.02 x 10/sup -4/ s at 95/sup 0/C. The pseudo activaion energy calculated from an Arrhenius plot of these data is about 27 kcal/mole.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6292499
- Report Number(s):
- ORNL/TM-6672
- Country of Publication:
- United States
- Language:
- English
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Removal of trace contaminants from recycle nitric acid
Oxidation of hydrazine by nitric acid
METHODS OF DECREASING THE EXTRACTION BY PROCESSING SOLVENTS OF NITROSYLRUTHENIUM NITRATO-COMPLEXES FROM NITRIC ACID SOLUTIONS. PART I. TREATMENT OF AQUEOUS SOLUTIONS WITH HYDROGEN PEROXIDE ANDOZONE
Journal Article
·
Fri May 01 00:00:00 EDT 1981
· Nucl. Technol.; (United States)
·
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Oxidation of hydrazine by nitric acid
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Tue May 01 00:00:00 EDT 1984
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METHODS OF DECREASING THE EXTRACTION BY PROCESSING SOLVENTS OF NITROSYLRUTHENIUM NITRATO-COMPLEXES FROM NITRIC ACID SOLUTIONS. PART I. TREATMENT OF AQUEOUS SOLUTIONS WITH HYDROGEN PEROXIDE ANDOZONE
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Related Subjects
050800* -- Nuclear Fuels-- Spent Fuels Reprocessing
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
ACETIC ACID
ACTIVATION ENERGY
CARBOXYLIC ACIDS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
DATA
DATA FORMS
ENERGY
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
ISOLATED VALUES
KINETICS
MONOCARBOXYLIC ACIDS
NITRIC ACID
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
OZONE
REACTION KINETICS
REMOVAL
REPROCESSING
SEPARATION PROCESSES
SILVER COMPOUNDS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
USES
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
ACETIC ACID
ACTIVATION ENERGY
CARBOXYLIC ACIDS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
DATA
DATA FORMS
ENERGY
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
ISOLATED VALUES
KINETICS
MONOCARBOXYLIC ACIDS
NITRIC ACID
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
OZONE
REACTION KINETICS
REMOVAL
REPROCESSING
SEPARATION PROCESSES
SILVER COMPOUNDS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
USES