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    METHOD FOR PREPARING 1,1-DICHLORO-1-FLUOROETHANE
    2.
    发明公开
    METHOD FOR PREPARING 1,1-DICHLORO-1-FLUOROETHANE 失效
    用于生产1,1-二氯-1-氟乙烷

    公开(公告)号：EP0690834A1

    公开(公告)日：1996-01-10

    申请号：EP94903673.0

    申请日：1993-12-17

    申请人： LAROCHE CHEMICALS INC.

    发明人： ACHORD, Betty, Jo ,  BOYCE, C., Bradford

    IPC分类号： B01J27 ,  C07B61 ,  C07C17 ,  C07C19

    CPC分类号： C07C17/087 ,  C07C19/12

    摘要： A more efficient reaction mechanism is provided for producing 1,1-dichloro-1-fluoroethane (HCFC-141b) by reacting vinylidene chloride with hydrogen fluoride in the liquid phase in the presence of a catalyst and sulfone based or nitrated solvent. In particular, by using a titanium tetrafluoride catalyst in conjunction with tetramethylene sulfone solvent, most all the vinylidene chloride reagents can be converted to HCFC-141b to the virtual exclusion of unwanted, closely associated byproducts like 1,1-difluoro-1-chloroethane (HCFC-142b) and 1,1,1-trifluoroethane (HFC-143a) while reducing the production of tars to a minimum.

    METHOD FOR PREPARING 1,1-DICHLORO-1-FLUOROETHANE
    3.
    发明授权
    METHOD FOR PREPARING 1,1-DICHLORO-1-FLUOROETHANE 失效
    用于生产1,1-二氯-1-氟乙烷

    公开(公告)号：EP0690834B1

    公开(公告)日：1998-07-29

    申请号：EP94903673.5

    申请日：1993-12-17

    申请人： LAROCHE CHEMICALS INC.

    发明人： ACHORD, Betty, Jo ,  BOYCE, C., Bradford

    IPC分类号： C07C19/12 ,  C07C17/087

    CPC分类号： C07C17/087 ,  C07C19/12

    摘要： A more efficient reaction mechanism is provided for producing 1,1-dichloro-1-fluoroethane (HCFC-141b) by reacting vinylidene chloride with hydrogen fluoride in the liquid phase in the presence of a catalyst and sulfone based or nitrated solvent. In particular, by using a titanium tetrafluoride catalyst in conjunction with tetramethylene sulfone solvent, most all the vinylidene chloride reagents can be converted to HCFC-141b to the virtual exclusion of unwanted, closely associated byproducts like 1,1-difluoro-1-chloroethane (HCFC-142b) and 1,1,1-trifluoroethane (HFC-143a) while reducing the production of tars to a minimum.

    Catalyst and process for 1,1,1,2-tetrafluoroethane by vapor phase reaction
    5.
    发明公开
    Catalyst and process for 1,1,1,2-tetrafluoroethane by vapor phase reaction 失效
    Katalysator和Verfahren zur Herstellung von 1,1,1,2-Tetrafluoräthanin der Dampfphase。

    公开(公告)号：EP0295885A1

    公开(公告)日：1988-12-21

    申请号：EP88305447.0

    申请日：1988-06-15

    申请人： LaRoche Chemicals Inc

    发明人： Sobolev, Igor

    IPC分类号： C07C19/08 ,  C07C17/00 ,  B01J27/132

    CPC分类号： B01J37/26 ,  B01J27/12 ,  C07C17/21 ,  C07C19/08

    摘要： A novel catalyst is prepared by codepositing hexavalent chromium oxide and a transition metal com­pound, preferably titanium trichloride, on alumina, followed by fluorinating the resulting combination. The catalyst is useful in the fluorination of a halo­ethylene of the formula CX₂=CHX (where the X's are chlo­rine or bromine or a combination of the two) in the vapor phase to form 1,1,1,2-tetrafluoroethane.

    摘要翻译： 通过将六价铬氧化物和过渡金属化合物（优选三氯化钛）在氧化铝上共沉淀，然后氟化所得到的组合来制备新的催化剂。 催化剂可用于在气相中氟化式CX2 = CHX（其中X为氯或溴或二者的组合）的卤代乙烯氟化以形成1,1,1,2-四氟乙烷。