发明授权
- 专利标题： METHOD FOR PREPARING 1,1-DICHLORO-1-FLUOROETHANE
- 专利标题（中）： 用于生产1,1-二氯-1-氟乙烷
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申请号： EP94903673.5申请日： 1993-12-17
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公开(公告)号： EP0690834B1公开(公告)日： 1998-07-29
- 发明人: ACHORD, Betty, Jo , BOYCE, C., Bradford
- 申请人： LAROCHE CHEMICALS INC.
- 申请人地址： 1200 Airline Highway, Baton Rouge, LA 70821 US
- 专利权人： LAROCHE CHEMICALS INC.
- 当前专利权人： LAROCHE CHEMICALS INC.
- 当前专利权人地址： 1200 Airline Highway, Baton Rouge, LA 70821 US
- 代理机构： Howick, Nicholas Keith
- 优先权： US992146 19921217
- 国际公布： WO9413607 19940623
- 主分类号： C07C19/12
- IPC分类号： C07C19/12 ; C07C17/087
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.
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