Effects of Diluents on the Reaction Hazards of Tributyl Phosphate with Nitric Acid

Autor:	Hariharan Seshadri, Asit Baran Mandal, Smitha Velayuthan Sreekantan, Samuel Vara Kumar Jala, Surianarayanan Mahadevan
Rok vydání:	2014
Předmět:	Exothermic reaction Butanol Organic Chemistry Extraction (chemistry) Inorganic chemistry chemistry.chemical_element PUREX Uranium Diluent chemistry.chemical_compound chemistry Nitric acid Tributyl phosphate Physical and Theoretical Chemistry Nuclear chemistry
Zdroj:	Organic Process Research & Development. 18:1821-1827
ISSN:	1520-586X 1083-6160
Popis:	A proportion of 30 wt % of tributyl phosphate (TBP) in suitable diluents is the workhorse in the extraction of U and Pu in the plutonium uranium extraction (PUREX) process. Accelerating rate calorimetric (ARC) studies of effects of diluents on TBP behavior reveal a similar thermal behavior irrespective of the nature of diluents. The reactive thermal hazards of 30 wt % of TBP with 4N HNO3 in different diluents show onset temperatures in the range of 105–130 °C with a significant pressure rise. Although the onset points are closer to the operating temperature range of the PUREX process, the heat rates are small. However, the process poses pressurization hazards due to the breakdown of the structure of TBP. Oxidation of butanol to butanoic acid is the main cause for exothermic behavior in all cases.
Databáze:	OpenAIRE
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