scholarly journals Uranium isotope separation by chemical exchange reactions between UF6 and derivatives of UF6-nitrogen oxide complexes

1972 ◽  
Author(s):  
A. J. Saraceno ◽  
C. F. Trivisonno
Keyword(s):  
Nitrogen Oxide ◽  
Chemical Exchange ◽  
Isotope Separation ◽  
Uranium Isotope ◽  
Exchange Reactions ◽  
Derivatives Of

Influence of Flow-Field Structure on Uranium Isotope Separation in the Separation Nozzle

1978 ◽  
Vol 40 (3) ◽  
pp. 329-340 ◽  
Author(s):  
W. Berkhahn ◽  
W. Ehrfeld ◽  
G. Krieg
Keyword(s):  
Flow Field ◽  
Isotope Separation ◽  
Field Structure ◽  
Uranium Isotope

scholarly journals Chemical Interaction-Induced Evolution of Phase Compatibilization in Blends of Poly(hydroxy ether of bisphenol-A)/Poly(1,4-butylene terephthalate)

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1667
Author(s):  
Jing Liu ◽  
Hsiang-Ching Wang ◽  
Chean-Cheng Su ◽  
Cheng-Fu Yang
Keyword(s):  
Bisphenol A ◽  
Chemical Interaction ◽  
Chemical Exchange ◽  
Hydroxyl Group ◽  
Random Copolymers ◽  
Exchange Reactions ◽  
Butylene Terephthalate ◽  
Alcoholysis Reaction ◽  
Immiscible Blend ◽  
Hydroxy Ether

An immiscible blend of poly(hydroxy ether of bisphenol-A) (phenoxy) and poly(1,4-butylene terephthalate) (PBT) with phase separation was observed in as-blended samples. The compatibilization of phenoxy/PBT blends can be promoted through chemical exchange reactions of phenoxy with PBT upon annealing. The annealed phenoxy/PBT blends had a homogeneous phase with a single Tg that could be enhanced by annealing at 260 °C. Infrared (IR) spectroscopy demonstrated that phase homogenization could be promoted by annealing the phenoxy/PBT blend, where alcoholytic exchange occurred between the dangling hydroxyl group (–OH) in phenoxy and the carbonyl group (C=O) in PBT in the heated blends. The alcoholysis reaction changed the aromatic linkages to aliphatic linkages in the carbonyl groups, which initially led to the formation of a graft copolymer of phenoxy and PBT with an aliphatic/aliphatic carbonyl link. The progressive alcoholysis reaction resulted in the transformation of the initial homopolymers into block copolymers and finally into random copolymers, which promoted phase compatibilization in blends of phenoxy with PBT. As the amount of copolymers increased upon annealing, the crystallization of PBT was inhibited by alcoholytic exchange in the blends.

scholarly journals A Fundamental Study on Uranium Isotope Separation Using U(IV)—U(VI) Electron Exchange Reaction

1983 ◽  
Vol 38 (10) ◽  
pp. 1072-1077
Author(s):  
Junji Fukuda ◽  
Yasuhiko Fujii ◽  
Makoto Okamoto
Keyword(s):  
Exchange Reaction ◽  
Isotope Separation ◽  
Analytical Data ◽  
Uranium Isotope ◽  
Electron Exchange ◽  
Separation Coefficient ◽  
Resin Column ◽  
Fundamental Study ◽  
Isotope Exchange Reaction ◽  
Different Temperatures

Abstract Displacement chromatography of electron-exchange reaction between U(IV) and U(VI) has been accomplished in an anion exchange resin column using Ti(III) ion as a reductant and Fe(III) ion as an oxidant. The details of the so-called redox-process for uranium isotope separation are described. The temperature dependencies of the elementary separation coefficient and the equilibrium constant of the isotope exchange reaction are discussed using the analytical data obtained by a series of separation experiments at different temperatures.

Design of a Mixer Settler Plant for Isotope Separation by Chemical Exchange

1995 ◽  
Vol 110 (2) ◽  
pp. 220-227 ◽  
Author(s):  
David A. White ◽  
Fathurrachman
Keyword(s):  
Chemical Exchange ◽  
Isotope Separation

Exchange reactions of stereoisomeric mercury derivatives of stilbene

1956 ◽  
Vol 5 (2) ◽  
pp. 157-164 ◽  
Author(s):  
A. N. Nesmeyanov ◽  
A. E. Borisov ◽  
N. A. Volkenau
Keyword(s):  
Exchange Reactions ◽  
Derivatives Of
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