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AssigneeAsahi Glass Company, Limited
InventorsShinsuke Morikawa, Keiichi Ohnishi, Hidekazu Okamoto, Toshihiro Tanuma
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The present invention relates to a simple method for producing 3,3-dichloro-1,1,1,2,2-pentafluoropropane (R225ca) and 1,3-dichloro-1,1,2,2,3-pentafluoropropane (R225cb) in good yield and at high selectivity by reacting tetrafluoroethylene (C2F4) and dichlorofluoromethane (R21) in the presence of a certain specific catalyst. The specific catalyst in the present invention is (1) a catalyst comprising halogenated oxide containing at least one element of Group 4, Group 5 and Group 13 such as Ti, Zr, Hf, V, B and Ga, or (2) a catalyst comprising halogenated oxide containing at least one element selected from Group 4, Group 5 and Group 13 such as Ti, Zr, Hf, V, B, Al and Ga and at least one element selected from Group 2, Group 6, Group 12 and Group 14 such as Ba, W, Zn, Si, Bi and P.
A method for producing 3,3-dichloro-1,1,1,2,2-pentafluoropropane and 1,3-dichloro-1,1,2,2,3-pentafluoropropane, which comprises reacting tetrafluoroethylene with dichlorofluoromethane in the presence of a catalyst comprising a halogenated oxide containing at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, B, Ga, In and Tl.
A method for producing 3,3-dichloro-1,1,1,2,2-pentafluoropropane and 1,3-dichloro-1,1,2,2,3-pentafluoropropane, which comprises reacting tetrafluoroethylene with dichlorofluoromethane in the presence of a catalyst comprising a halogenated oxide containing at least one element selected from the group consisting of Ti, Zr and Hf.
A method for producing 3,3-dichloro-1,1,1,2,2-pentafluoropropane and 1,3-dichloro-1,1,2,2,3-pentafluropropane, which comprises reacting tetrafluoroethylene with dichlorofluoromethane in the presence of a catalyst comprising a halogenated oxide containing at least one element selected from the group consisting of V, Nb and Ta.
A method for producing 3,3-dichloro-1,1,1,2,2-pentafluoropropane and 1,3-dichloro-1,1,2,2,3-pentafluropropane, which comprises reacting tetrafluoroethylene with dichlorofluoromethane in the presence of a catalyst comprising a halogenated oxide containing at least one element selected from the group consisting of B, Ga, In and Tl.
Dependencies are inferred from the claim text.