Solubility of Boron Compounds in Nitric Acid Solutions
A series of laboratory experiments has been performed to determine flowsheet conditions for formation of boron solids during processing of glovebox floor sweepings (FS) and sand, slag, and crucible (S,S, and C) materials in canyon dissolvers. The precipitation of a boron compound (KBF4) was identified during the flowsheet development work for processing Rocky Flats S,S, and C materials at Savannah River. The subsequent series of laboratory experiments has focused on flowsheet conditions planned for the dissolution of glovebox floor sweepings in S,S, and C solutions.The concentrations of potassium fluoride (KF) and total fluoride were established where precipitation of boron solids would and would not occur during the processing of floor sweepings. Other variables such as changes in nitric acid and iron concentrations were found to have no impact on formation of boron solids. Results presented in Table 1 indicate that boron solids will not form at 0.22 molar KF and 0.30 molar total fluoride during processing of floor sweepings and at 0.22 molar KF and 0.32 molar total fluoride during processing of S,S, and C materials.
- Research Organization:
- Savannah River Site
- Sponsoring Organization:
- DOE
- DOE Contract Number:
- AC09-96SR18500
- OSTI ID:
- 4883
- Report Number(s):
- WSRC-TR-98-00426; ON: DE00004883
- Country of Publication:
- United States
- Language:
- English
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