Patent application number | Description | Published |
20090099395 | Method for Producing 1,3,3,3-Tetrafluoropropene - There is provided a method for producing 1,3,3,3-tetrafluoropropene. This method includes dehydrofluorinating 1,1,1,3,3-pentafluoropropane in gas phase in the presence of a zirconium compound-carried catalyst in which a zirconium compound is carried on a metal oxide or activated carbon. | 04-16-2009 |
20120065435 | Dehydration Process of Hydrofluorocarbon or Hydrochlorofluorocarbon and Production Method of 1,3,3,3-Tetrafluoropropene Using the Dehydration Process - A process for dehydrating a hydrofluorocarbon or hydrochlorofluorocarbon, which can be done by simple equipment, and a continuous process of producing 1,3,3,3-tetrafluoropropene using the dehydration process. The dehydration process includes cooling the hydrofluorocarbon or hydrochlorofluorocarbon in gaseous form containing water with a heat exchanger, thereby condensing and liquefying the hydrofluorocarbon or hydrochlorofluorocarbon while freezing and solidifying the water. The 1,3,3,3-tetrafluoropropene production method includes a first step for fluorinating 1-chloro-3,3,3-trifluoropropene with hydrogen fluoride to obtain a mixture of 1,3,3,3-tetrafluoropropene, unreacted 1-chloro-3,3,3-trifluoropropene, hydrogen fluoride, hydrogen chloride and by-products, or dehydrofluorinating 1,1,1,3,3-pentafluoropropane to obtain a mixture of 1,3,3,3-tetrafluoropropene, unreacted 1,1,1,3,3-pentafluoropropane and by-products, a second step for removing acidic components, a third step for dehydrating the 1,3,3,3-tetrafluoropropene by the above dehydration process, and a fourth step for purifying the 1,3,3,3-tetrafluoropropene by distillation. | 03-15-2012 |
20120123172 | Production Method Of Trans-1,3,3,3-Tetrafluoropropene - Production of trans-1,3,3,3-tetrafluoropropene by reacting 1-chloro-3,3,3-trifluoropropene with hydrogen fluoride to obtain a reaction product A containing formed trans-1,3,3,3-tetrafluoropropene, unreacted 1-chloro-3,3,3-trifloropropene and hydrogen fluoride, and by-product cis-1,3,3,3-tetrafluoropropene, 1,1,1,3,3-pentafluoropropane and hydrogen chloride; distilling reaction product A to recover a distillation bottom product containing 1-chloro-3,3,3-trifloropropene and hydrogen fluoride and supplying recovered distillation bottom product to the reacting step; recovering hydrogen fluoride from a residue B remaining after recovery of the distillation bottom product and supplying recovered hydrogen fluoride to the reacting step; contacting a residue C remaining after recovery of hydrogen fluoride with water or aqueous sodium hydroxide solution to separate hydrogen chloride; dehydrating a residue D remaining after separation of hydrogen chloride; and distilling a residue E remaining after the dehydration to obtain trans-1,3,3,3-tetrafluoropropene. The method reuses unreacted reactants and produces the target compound efficiently. | 05-17-2012 |
20120298911 | Dry Etching Agent and Dry Etching Method Using the Same - A dry etching agent according to the present invention contains (A) a fluorinated propyne represented by the chemical formula: CF | 11-29-2012 |
20120302804 | Method for Producing 3,3,3-Trifluoro Propene - A production method of 3,3,3-trifluoropropene includes the step of hydrogenating 1-chloro-3,3,3-trifluoropropene with hydrogen (H | 11-29-2012 |
20130105728 | Dry Etching Agent and Dry Etching Method | 05-02-2013 |
20140242803 | Dry Etching Agent and Dry Etching Method Using the Same - A dry etching agent according to the present invention contains (A) a fluorinated propyne represented by the chemical formula: CF | 08-28-2014 |
20140302683 | DRY ETCHING AGENT - The invention is directed to providing a dry etching agent having little effect on the global environment but having the required performance. Provided is a dry etching agent containing, each at a specific vol %: (A) a fluorine-containing unsaturated hydrocarbon represented by the formula C | 10-09-2014 |