发明授权
US07678949B2 Process for the preparation of 1,3,3,3-tetrafluoropropene and/or 2,3,3,3-tetrafluoropropene
失效
制备1,3,3,3-四氟丙烯和/或2,3,3,3-四氟丙烯的方法
- 专利标题： Process for the preparation of 1,3,3,3-tetrafluoropropene and/or 2,3,3,3-tetrafluoropropene
- 专利标题（中）： 制备1,3,3,3-四氟丙烯和/或2,3,3,3-四氟丙烯的方法
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申请号： US11988983申请日： 2006-08-04
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公开(公告)号： US07678949B2公开(公告)日： 2010-03-16
- 发明人: Velliyur Nott Mallikarjuna Rao , H. David Rosenfeld , Allen Capron Sievert , Shekhar Subramoney
- 申请人： Velliyur Nott Mallikarjuna Rao , H. David Rosenfeld , Allen Capron Sievert , Shekhar Subramoney
- 申请人地址： US DE Wilmington
- 专利权人： E.I. du Pont de Nemours and Company
- 当前专利权人： E.I. du Pont de Nemours and Company
- 当前专利权人地址： US DE Wilmington
- 国际申请： PCT/US2006/030531 WO 20060804
- 国际公布： WO2007/019355 WO 20070215
- 主分类号： C07C17/00
- IPC分类号： C07C17/00
摘要：
A process for the manufacture of CF3CH═CHF and/or CF3CF═CH2 is disclosed. The process involves (a) reacting HF and chlorine and at least one halopropene of the formula CX3CCI═CCIX (where each X is independently F or Cl) to produce a product including both CF3CCI2CCIF2 and CF3CCIFCCI2F; (b) reacting CF3CCI2CCIF2 and CF3CCIFCCI2F produced in (a) with hydrogen to produce a product including both CF3CH2CHF2 and CF3CHFCH2F; (c) dehydrofluorinating CF3CH2CHF2 and CF3CHFCH2F produced in (b) to produce a product including both CF3CH═CHF and CF3CF═CH2; and (d) recovering CF3CH═CHF and/or CF3CF═CH2 from the product produced in (c). In (a), both CF3CCI2CCIF2 and CF3CCIFCCI2F are produced in the presence of a chlorofluorination catalyst consisting of (i) compositions comprising a crystalline alpha-chromium oxide where at least 0.05 atom % of the chromium atoms in the alpha-chromium oxide lattice are replaced by copper, and (ii) compositions of (i) which have been treated with a fluorinating agent.