Patent ID: 8816140
Filing Date: 2014-08-26
Classification: C07C,Y02P

Abstract:
1. A process for producing a fluorine-containing alkene represented by formula (1): wherein: X each independently represents F or Cl, and n is an integer of 0 to 2, provided that n is 0 when a chlorine-containing alkene represented by formula (4) (below) is used as a chlorine-containing compound, the process comprising: (i) a first reaction step of reacting: at least one chlorine-containing compound selected from the group consisting of: a chlorine-containing alkane represented by formula (2): a chlorine-containing alkene represented by formula (3): a chlorine-containing alkene represented by formula (4): with a fluorinating agent under increased pressure of from 0.3 MPa to 5 MPa in a gas phase in the presence of at least one fluorination catalyst selected from the group consisting of chromium oxide and fluorinated chromium oxide, to obtain a product; and (ii) a second reaction step of heating the product obtained in the first reaction step in a gas phase under a pressure lower than the pressure in the first reaction step to perform a dehydrohalogenation reaction of a fluorine-containing alkane that is contained in the product of the first reaction step, wherein the fluorine-containing alkane is represented by formula (5): to obtain the fluorine-containing alkene of the formula (1).