Factors affecting the rate of hydrolysis of phenylboronic acid in lab-scale precipitate reactor studies

Conference · Thu Oct 01 00:00:00 EDT 1992

OSTI ID:10184793

Bannochie, C J; Marek, J C; Eibling, R E; Baich, M A

Removing aromatic carbon from an aqueous slurry of cesium-137 and other alkali tetraphenylborates by acid hydrolysis will be an important step in preparing high-level radioactive waste for vitrification at the Savannah River Site`s Defense Waste Processing Facility (DWPF). Kinetic data obtained in bench-scale precipitate hydrolysis reactors suggest changes in operating parameters to improve product quality in the future plant-scale radioactive operation. The rate-determining step is the removal of the fourth phenyl group, i.e. hydrolysis of phenylboronic acid. Efforts to maximize this rate have established the importance of several factors in the system, including the ratio of copper(II) catalyst to formic acid, the presence of nitrite ion, reactions of diphenylmercury, and the purge gas employed in the system.

• Research Organization: Westinghouse Savannah River Co., Aiken, SC (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC09-89SR18035
• OSTI ID: 10184793
• Report Number(s): WSRC-MS-92-324; CONF-9209226-1; ON: DE93000472
• Resource Relation: Conference: American Chemical Society (ACS) special symposium on emerging technologies in hazardous waste management,Atlanta, GA (United States),21-23 Sep 1992; Other Information: PBD: [1992]
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BORONIC ACIDS
HYDROLYSIS
HIGH-LEVEL RADIOACTIVE WASTES
RADIOACTIVE WASTE PROCESSING
SAVANNAH RIVER PLANT
RADIOACTIVE WASTE FACILITIES
AROMATICS
CESIUM 137
CHEMICAL REACTION KINETICS
COPPER
CATALYSTS
NITRITES
ORGANIC MERCURY COMPOUNDS
052001
400201
WASTE PROCESSING
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES