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Title: LITERATURE REVIEW OF BORIC ACID SOLUBILITY DATA

Abstract

A new solvent system is being evaluated for use in the Modular Caustic-Side Solvent Extraction Unit (MCU) and in the Salt Waste Processing Facility (SWPF). The new system replaces the current dilute nitric acid strip solution with 0.01 M boric acid. This literature study is performed to determine if there is a potential for boric acid to crystallize in the lines with emphasis on the transfer lines to the Defense Waste Processing Facility. This report focuses on the aqueous phase chemistry of boric acid under conditions relevant to MCU and SWPF. Operating and transfer conditions examined for the purpose of this review include temperatures between 13 C (McLeskey, 2008) and 45 C (Fondeur, 2007) and concentrations from 0 to 3M in nitric acid as well as exposure of small amounts of entrained boric acid in the organic phase to the sodium hydroxide caustic wash stream. Experiments were also conducted to observe any chemical reactions and off-gas generation that could occur when 0.01 M boric acid solution mixes with 3 M nitric acid solution and vice versa. Based on the low concentration (0.01M) of boric acid in the MCU/SWPF strip acid and the moderate operating temperatures (13 C to 45 C),more » it is unlikely that crystallization of boric acid will occur in the acid strip solution under process or transfer conditions. Mixing experiments of boric and nitric acid show no measurable gas generation (< 1 cc of gas per liter of solution) under similar process conditions.« less

Authors:
;
Publication Date:
Research Org.:
SRS
Sponsoring Org.:
USDOE
OSTI Identifier:
1025802
Report Number(s):
SRNL-STI-2011-00578
TRN: US201122%%444
DOE Contract Number:  
DE-AC09-08SR22470
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; BORIC ACID; CHEMICAL REACTIONS; CHEMISTRY; CRYSTALLIZATION; NITRIC ACID; SODIUM HYDROXIDES; SOLUBILITY; SOLVENT EXTRACTION; SOLVENTS; WASTE PROCESSING

Citation Formats

Crapse, K., and Kyser, E. LITERATURE REVIEW OF BORIC ACID SOLUBILITY DATA. United States: N. p., 2011. Web. doi:10.2172/1025802.
Crapse, K., & Kyser, E. LITERATURE REVIEW OF BORIC ACID SOLUBILITY DATA. United States. doi:10.2172/1025802.
Crapse, K., and Kyser, E. Thu . "LITERATURE REVIEW OF BORIC ACID SOLUBILITY DATA". United States. doi:10.2172/1025802. https://www.osti.gov/servlets/purl/1025802.
@article{osti_1025802,
title = {LITERATURE REVIEW OF BORIC ACID SOLUBILITY DATA},
author = {Crapse, K. and Kyser, E.},
abstractNote = {A new solvent system is being evaluated for use in the Modular Caustic-Side Solvent Extraction Unit (MCU) and in the Salt Waste Processing Facility (SWPF). The new system replaces the current dilute nitric acid strip solution with 0.01 M boric acid. This literature study is performed to determine if there is a potential for boric acid to crystallize in the lines with emphasis on the transfer lines to the Defense Waste Processing Facility. This report focuses on the aqueous phase chemistry of boric acid under conditions relevant to MCU and SWPF. Operating and transfer conditions examined for the purpose of this review include temperatures between 13 C (McLeskey, 2008) and 45 C (Fondeur, 2007) and concentrations from 0 to 3M in nitric acid as well as exposure of small amounts of entrained boric acid in the organic phase to the sodium hydroxide caustic wash stream. Experiments were also conducted to observe any chemical reactions and off-gas generation that could occur when 0.01 M boric acid solution mixes with 3 M nitric acid solution and vice versa. Based on the low concentration (0.01M) of boric acid in the MCU/SWPF strip acid and the moderate operating temperatures (13 C to 45 C), it is unlikely that crystallization of boric acid will occur in the acid strip solution under process or transfer conditions. Mixing experiments of boric and nitric acid show no measurable gas generation (< 1 cc of gas per liter of solution) under similar process conditions.},
doi = {10.2172/1025802},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {9}
}

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