Proposed alternate dissolving flowsheets for the Redox plant
Current operation of the Redox plant dissolvers results in evolution of ammonia during the slug jacket removal step. Staggering the schedules of the dissolving cycles of the three dissolvers is being practiced at present to prevent the formation of ammonium nitrate crystals in the stack gases, but this procedure limits the dissolver capacity. Steps are being taken to provide ammonia scrubbers for the dissolvers to eliminate this need for close scheduling of dissolving operations. It has been proposed (HW-30838) that mercury-catalyzed nitric acid dissolving of the jackets be adapted to the Redox plant. Such a process would eliminate ammonia from the off-gases and would offer several other advantages as well. A flowsheet was proposed based on work in the Process Chemistry laboratory and developed by runs in the 321 Building 1/20-scale dissolver. However, the off-gases resulting from this flowsheet were found to contain hydrogen, and further laboratory work was thus undertaken to provide a solution to this problem. It is the purpose of this paper to summarize the recent development work on the mercury-catalyzed nitric acid slug de- jacketing and dissolving procedure, and to show how these findings may be applied to the Redox operation by the use of alternate flowsheets.
- Research Organization:
- General Electric Co., Richland, WA (United States). Hanford Atomic Products Operation
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 10115023
- Report Number(s):
- HW-32823; ON: DE92005578
- Resource Relation:
- Other Information: PBD: 13 Aug 1954
- Country of Publication:
- United States
- Language:
- English
Similar Records
PROPOSED ALTERNATE DISSOLVING FLOWSHEETS FOR THE REDOX PLANT
Nitric acid recovery and ammonia removal: Modifications to the Redox dissolver off-gas systems