Use of extractive distillation to produce concentrated nitric acid
Concentrated nitric acid (> 95 wt %) is needed for the treatment of off-gases from a fuels-reprocessing plant. The production of concentrated nitric acid by means of extractive distillation in the two-pot apparatus was studied to determine the steady-state behavior of the system. Four parameters, EDP volume (V/sub EDP/) and temperature (T/sub EDP/), acid feed rate, and solvent recycle, were independently varied. The major response factors were percent recovery (CPRR) and product purity (CCP). Stage efficiencies also provided information about the system response. Correlations developed for the response parameters are: CPRR = 0.02(V/sub EDP/ - 800 cc) + 53.5; CCP = -0.87 (T/sub EDP/ - 140/sup 0/C) + 81; eta/sub V,EDP/ = 9.1(F/sub feed/ - 11.5 cc/min) - 0.047(V/sub EDP/ - 800 cc) - 2.8(F/sub Mg(NO/sub 3/)/sub 2// - 50 cc/min) + 390; and eta/sub L,EDP/ = 1.9(T/sub EDP/ - 140/sup 0/C) + 79. A computer simulation of the process capable of predicting steady-state conditions was developed, but it requires further work.
- Research Organization:
- Massachusetts Inst. of Tech., Oak Ridge, TN (USA). School of Chemical Engineering Practice; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6604831
- Report Number(s):
- ORNL/MIT-325; TRN: 81-008217
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
HYDRIODIC ACID
CHEMICAL REACTIONS
NITRIC ACID
DISTILLATION
EXTRACTION
RECOVERY
RADIOACTIVE WASTE PROCESSING
IODINE 129
IODINE 131
IODOX PROCESS
COMPUTERIZED SIMULATION
FUEL REPROCESSING PLANTS
IODIC ACID
MAGNESIUM NITRATES
OFF-GAS SYSTEMS
SOLIDIFICATION
ALKALINE EARTH METAL COMPOUNDS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
DAYS LIVING RADIOISOTOPES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IODINE COMPOUNDS
IODINE ISOTOPES
ISOTOPES
MAGNESIUM COMPOUNDS
MANAGEMENT
NITRATES
NITROGEN COMPOUNDS
NUCLEAR FACILITIES
NUCLEI
ODD-EVEN NUCLEI
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PROCESSING
RADIOISOTOPES
SEPARATION PROCESSES
SIMULATION
WASTE MANAGEMENT
WASTE PROCESSING
YEARS LIVING RADIOISOTOPES
052001* - Nuclear Fuels- Waste Processing
050800 - Nuclear Fuels- Spent Fuels Reprocessing