ISSN:
1572-879X
Keywords:
ruthenium catalyst
;
hydrodechlorination
;
dimerization
;
chlorofluoroethanes
;
hydrochlorofluoroethanes
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The hydrodechlorination of CCl3-CF3 (CFC-113a) was studied over silica-supported metal catalysts. Pd/SiO2 and Pt/SiO2 catalysts showed high activity for the replacement reaction of the chlorine atoms in CFC-113a with hydrogen. On the other hand, Ru/SiO2 selectively catalyzed the dimerization and gave CF3-CC1=CC1-CF3 and CF3-CCl2-CC12-CF3. CHC12-CF3 (HCFC-123) and CC12F-CF3 (CFC-114a) also dimerized into the corresponding C4-dimers over the catalyst. The reactivity of CF3-having haloethanes on the Ru/SiO2 decreased in the order of CFC-113a 〉 HCFC-123 〉 CFC-114a≫HCFC-124. The selectivity of dimerization decreased with decreasing the reactivity of substrates.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00806902
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