METHOD FOR PRODUCTION OF DIFLUOROCHLOROMETHANE

METHOD FOR PRODUCTION OF DIFLUOROCHLOROMETHANE

FIELD: organic chemistry, in particular difluorochloromethane useful as cooling agent, propellant, blowing agent, as well as in fluoromonomers production. ^ SUBSTANCE: chloroform is treated with hydrogen fluoride in presence of catalyst predissolved in chloroform with concentration of 20-30 mol.% an...

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Bibliographische Detailangaben
Hauptverfasser: VYRAZHEJKIN E.S, ANDRUKH O.V, ANDREJCHATENKO V.V, GOLUBEV A.N, SHABALIN D.A, FRENDAK V.M, ZHAKHANOVICH S.P, NOVIKOVA M.D, ZAKHAROV V.JU, KUZNETSOV V.N, BLINOV I.B
Format: Patent
Sprache:eng ; rus
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:FIELD: organic chemistry, in particular difluorochloromethane useful as cooling agent, propellant, blowing agent, as well as in fluoromonomers production. ^ SUBSTANCE: chloroform is treated with hydrogen fluoride in presence of catalyst predissolved in chloroform with concentration of 20-30 mol.% and chlorine, at temperature of 60-110°C and pressure of 7013 atm. As catalyst mixture of antimony pentachloride, fluorotetrachloride and trichloride in ratio of 1:(0.03-0.15):(0.03-0.15), respectively is used. Process is carried out under continuous controlling reaction mass electrical resistance which is maintained in limits of 600-1600 Om. Chlorine is introduced in amount of 0.01-0.3 mass % with respect to chloroform. Method of present invention makes it possible to control synthesis parameters in dependence of reaction mass electrical resistance. ^ EFFECT: increased process selectivity; new catalyst. ^ 5 cl, 4 ex