Thermodynamic Aspects of the Use of Elementary Fluorine as the Fluorinating Agent

2021 ◽  
Vol 55 (4) ◽  
pp. 677-687
Author(s):  
D. S. Pashkevich ◽  
P. S. Kambur ◽  
V. V. Kapustin ◽  
N. A. Belov ◽  
Yu. I. Alekseev ◽  
...  
Keyword(s):  
Fluorinating Agent ◽  
Elementary Fluorine

Intercalation of uranium hexafluoride into graphite

1985 ◽  
Vol 50 (4) ◽  
pp. 947-955 ◽  
Author(s):  
Karel Klouda ◽  
Václav Rak ◽  
Josef Vachuška
Keyword(s):  
Carbon Atom ◽  
Surface Area ◽  
Gaseous Phase ◽  
Uranium Hexafluoride ◽  
Graphite Particles ◽  
Fluorination Agent ◽  
Increasing Temperature ◽  
Elementary Fluorine

Intercalation of UF6 into graphite, both from the gaseous phase and from the Ledon 113 solution, was studied. The amount of intercalated UF6 from the gaseous phase was found to be inversely proportional to the size of graphite particles. Intercalation increases with the increasing temperature and surface area of graphite. The contact of gaseous UF6 with graphite led to the formation of β-UF5 that is not intercalated. In the Ledon solution, β-UF5 is not formed. "Passivation" of graphite by elementary fluorine also prevents the formation of β-UF5 but the amount of intercalated UF6 decreases. The intercalation of UF6 into graphite from the gaseous phase is accompanied by the increase of the distance between the parallel carbon atom layers up to the values of about 884 pm. Ternary intercalates graphite-UF6-Ledon 113 are formed during the intercalation of UF6 from the Ledon 113 solutions and the distance between the parallel carbon atom layers is 848-875 pm. Thermogravimetry in the presence of air revealed that the binary intercalates graphite-UF6 decompose in a 3-step reaction while the ternary intercalates decompose in a 4-step reaction. In both cases uranium hexafluoride is not released but acts as a fluorination agent on the graphite carbon.

The fluorination of plastics in solvents with elementary fluorine

1987 ◽  
Vol 35 (1) ◽  
pp. 205
Author(s):  
Claus Bliefert ◽  
Hans-Michael Boldhaus ◽  
Frank Erdt ◽  
Manfred Hoffmann
Keyword(s):  
Elementary Fluorine

Fluoride Technology of Processing Oxides of Rare Earth Elements

2015 ◽  
Vol 1084 ◽  
pp. 82-86
Author(s):  
Alexander Y. Swarovski ◽  
Alexander I. Soloviev ◽  
Anatoly L. Kalashnikov ◽  
Valentina M. Malyutina ◽  
Arthur S. Sitnikov ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Elemental Fluorine ◽  
Fluorinating Agent

The paper describes the advantages and characteristics of the fluoride technology applicable for the recovery of oxides of rare earth elements with the help of a fluorinating agent of elemental fluorine. A metallurgical mixture (2.5 m2/g) of rare earth elements oxides of the cerium subgroup, containing % wt.: CeO2 - 50-55; La2 O3 - 23-25; Pr6O11 - 6-9, and Nd2O3 - 13-16 were studied. It has been shown, that using fluoride technology allows recovering mixture of rare earth elements with outlet no less than 98.9 %.

Fluorinated nanocarbons using fluorinating agent: Strategies of fluorination and applications

2009 ◽  
Vol 75 (2) ◽  
pp. 133-139 ◽  
Author(s):  
W. Zhang ◽  
M. Dubois ◽  
K. Guérin ◽  
P. Bonnet ◽  
H. Kharbache ◽  
...  
Keyword(s):  
Fluorinating Agent

ChemInform Abstract: Diethylaminosulfur Trifluoride (DAST) as a Fluorinating Agent of Pyrimidine Nucleosides Having a 2′,3′-Vicinal Diol System.

ChemInform ◽  
2010 ◽  
Vol 22 (1) ◽  
pp. no-no
Author(s):  
H. HAYAKAWA ◽  
F. TAKAI ◽  
H. TANAKA ◽  
T. MIYASAKA ◽  
K. YAMAGUCHI
Keyword(s):  
Fluorinating Agent ◽  
Pyrimidine Nucleosides ◽  
Vicinal Diol
Sign in / Sign up

Export Citation Format

Share Document