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Resolution of the mixture TBP-H/sub 2/ MPB-HDB-PH/sub 3/PO/sub 4/. Application to the systems UO/sub 2/(NO/sub 3/)/sub 2/-TBP, Th(NO/sub 3/)/sub 4/-TBP and ZrO(NO/sub 3/)/sub 2/-TBP

Journal Article:

Abstract

Tributylphosphate (TBP) is presently the most used extractant for uranium, thorium and zirconium technologies, both for the purification of these elements from their concentrates and for the recovery of heavy metals in the reprocessing of irradiated fuels. Nevertheless, in the presence of phosphoric acid, some degradation products are formed, such as: di-n-butylphosphoric acid (HDBP), monobutylphosphoric ancd (H/sub 2/MBP) and ortophosphoric acid. The accumulation of these degradation products in the organic phase of the liquid-liquid extraction processes is highly undesirable. In order to avoid this problem, the separation of the mixture HDBP, H/sub 2/MBP and H/sub 3/PO/sub 4/ in TBP-dilutent or TBP-diluent-uranyl, thorium of zirconyl nitrate was then studied. Several separation techniques were investigated: adsorption using a cationic resin saturated with U(VI), chromatography in macroporous polymers, chromatography in alumina columns. Refractive index and condutimetric measurements were carried out to follow up the separation processes. The best results were obtained in an alumina column.
Authors:
Pires, M A.F.; Abrao, A [1] 
  1. Instituto de Pesquisas Energeticas e Nucleares, Sao Paulo (Brazil). Centro de Engenharia Quimica
Publication Date:
Jan 01, 1980
Product Type:
Journal Article
Reference Number:
AIX-16-023582; EDB-85-073258
Resource Relation:
Journal Name: An. Assoc. Bras. Quim.; (Brazil); Journal Volume: 31:3/4
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; DBP; REMOVAL; MBP; TBP; PURIFICATION; RADIOLYSIS; ADSORPTION; CHEMICAL ANALYSIS; CHROMATOGRAPHY; DIAGRAMS; ELECTRIC CONDUCTIVITY; ION EXCHANGE MATERIALS; REFRACTIVITY; RESINS; SEPARATION PROCESSES; URANYL NITRATES; ACTINIDE COMPOUNDS; BUTYL PHOSPHATES; CHEMICAL RADIATION EFFECTS; CHEMICAL REACTIONS; CHEMISTRY; DECOMPOSITION; ELECTRICAL PROPERTIES; ESTERS; MATERIALS; NITRATES; NITROGEN COMPOUNDS; OPTICAL PROPERTIES; ORGANIC COMPOUNDS; ORGANIC PHOSPHORUS COMPOUNDS; ORGANIC POLYMERS; OXYGEN COMPOUNDS; PETROCHEMICALS; PETROLEUM PRODUCTS; PHOSPHORIC ACID ESTERS; PHYSICAL PROPERTIES; POLYMERS; RADIATION CHEMISTRY; RADIATION EFFECTS; SORPTION; URANIUM COMPOUNDS; URANYL COMPOUNDS; 400105* - Separation Procedures; 050800 - Nuclear Fuels- Spent Fuels Reprocessing; 400600 - Radiation Chemistry
OSTI ID:
5769320
Country of Origin:
Brazil
Language:
Portuguese
Other Identifying Numbers:
Journal ID: CODEN: AABQA
Submitting Site:
HEDB
Size:
Pages: 253-261
Announcement Date:

Journal Article:

Citation Formats

Pires, M A.F., and Abrao, A. Resolution of the mixture TBP-H/sub 2/ MPB-HDB-PH/sub 3/PO/sub 4/. Application to the systems UO/sub 2/(NO/sub 3/)/sub 2/-TBP, Th(NO/sub 3/)/sub 4/-TBP and ZrO(NO/sub 3/)/sub 2/-TBP. Brazil: N. p., 1980. Web.
Pires, M A.F., & Abrao, A. Resolution of the mixture TBP-H/sub 2/ MPB-HDB-PH/sub 3/PO/sub 4/. Application to the systems UO/sub 2/(NO/sub 3/)/sub 2/-TBP, Th(NO/sub 3/)/sub 4/-TBP and ZrO(NO/sub 3/)/sub 2/-TBP. Brazil.
Pires, M A.F., and Abrao, A. 1980. "Resolution of the mixture TBP-H/sub 2/ MPB-HDB-PH/sub 3/PO/sub 4/. Application to the systems UO/sub 2/(NO/sub 3/)/sub 2/-TBP, Th(NO/sub 3/)/sub 4/-TBP and ZrO(NO/sub 3/)/sub 2/-TBP." Brazil.
@misc{etde_5769320,
title = {Resolution of the mixture TBP-H/sub 2/ MPB-HDB-PH/sub 3/PO/sub 4/. Application to the systems UO/sub 2/(NO/sub 3/)/sub 2/-TBP, Th(NO/sub 3/)/sub 4/-TBP and ZrO(NO/sub 3/)/sub 2/-TBP}
author = {Pires, M A.F., and Abrao, A}
abstractNote = {Tributylphosphate (TBP) is presently the most used extractant for uranium, thorium and zirconium technologies, both for the purification of these elements from their concentrates and for the recovery of heavy metals in the reprocessing of irradiated fuels. Nevertheless, in the presence of phosphoric acid, some degradation products are formed, such as: di-n-butylphosphoric acid (HDBP), monobutylphosphoric ancd (H/sub 2/MBP) and ortophosphoric acid. The accumulation of these degradation products in the organic phase of the liquid-liquid extraction processes is highly undesirable. In order to avoid this problem, the separation of the mixture HDBP, H/sub 2/MBP and H/sub 3/PO/sub 4/ in TBP-dilutent or TBP-diluent-uranyl, thorium of zirconyl nitrate was then studied. Several separation techniques were investigated: adsorption using a cationic resin saturated with U(VI), chromatography in macroporous polymers, chromatography in alumina columns. Refractive index and condutimetric measurements were carried out to follow up the separation processes. The best results were obtained in an alumina column.}
journal = {An. Assoc. Bras. Quim.; (Brazil)}
volume = {31:3/4}
journal type = {AC}
place = {Brazil}
year = {1980}
month = {Jan}
}