AZEOTROPE-LIKE COMPOSITION OF HEXAFLUOROPROPANE, HEXAFLUOROPROPENE AND HYDROGEN FLUORIDE

• Main Authors: RYAN HULSE, PHAM HANG T, TUNG HSUEH SUNG, KONSTANTIN A POKROVSKI, RAJIV RATNA SINGH, MERKEL DANIEL C
• Format: Patent
• Language: English; Japanese
• Published: 28.12.2016
• Subjects: ADHESIVES; CHEMISTRY; DYES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES

PROBLEM TO BE SOLVED: To provide a method for isolating/purifying 1,1,1,2,3,3-hexafluoropropane (HFC-236ea) as an intermediate in the production of 2,3,3,3-tetrafluoropropene (HFO-1234yf).SOLUTION: This invention relates to a method for removing 1,1,1,2,3,3-hexafluoropropane from a mixture containing 1,1,1,2,3,3-hexafluoropropane and at least one impurity, comprising: adding hydrogen fluoride and, optionally, hexafluoropropene to the mixture in an effective amount to form an azeotropic or azeotrope-like composition of 1,1,1,2,3,3-hexafluoropropane, hexafluoropropene, and hydrogen fluoride; and separating the azeotropic composition from the impurity.SELECTED DRAWING: None 【課題】２，３，３，３−テトラフルオロプロペン（ＨＦＯ−１２３４ｙｆ）の製造における中間体としての１，１，１，２，３，３−ヘキサフルオロプロパン（ＨＦＣ−２３６ｅａ）を単離／精製する方法を提供する。【解決手段】１，１，１，２，３，３−ヘキサフルオロプロパン及び少なくとも１種類の不純物を含む混合物から１，１，１，２，３，３−ヘキサフルオロプロパンを取り出す方法であって、フッ化水素及び場合によってはヘキサフルオロプロペンを、１，１，１，２，３，３−ヘキサフルオロプロパン、ヘキサフルオロプロペン、及びフッ化水素の共沸性又は共沸混合物様の組成物を形成するのに有効な量で混合物に加え、そして共沸性組成物を不純物から分離することを含む方法。【選択図】なし