发明名称 |
Processes for the preparation of 2-chloro-1,1,1,2,3,3,3-heptafluoropropane, hexafluoropropene and 1,1,1,2,3,3,3-heptafluoropropane |
摘要 |
A process for the preparation of 2-chloro-1,1,1,3,3,3-heptafluoropropane is disclosed which involves (a) contacting a mixture comprising hydrogen fluoride, chlorine, and at least one starting material selected from the group consisting of halopropenes of the formula CX3CCI-CX2 and halopropanes of the formula the CX3CCIYCX3, wherein each X is independently F or Cl, and Y is H, Cl or F (provided that the number of X and Y which are F totals no more than six) with a chlorofluorination catalyst in a reaction zone to produce a product mixture comprising CF3CCIFCF3, HCI, HF. and underfluorinated halogenated hydrocarbon intermediates. The process is characterized by said chlorofluorination catalyst comprising at least one chromium-containing component selected from (i) a crystalline alpha-chromium oxide where at least 0.05 atom % of the chromium atoms in the alpha-chromium oxide lattice are replaced by nickel, trivalent cobalt or both nickel and trivalent cobalt, provided that no more than 2 atom % of the chromium atoms in the alpha-chromium oxide lattice are replaced by nickel and that the total amount of chromium atoms in the alpha-chromium oxide lattice that are replaced by nickel and trivalent cobalt is no more than 6 atom %, and (ii) a fluorinated crystalline oxide of (i). Also disclosed is a process for the manufacture of a mixture of HFC-227ea and hexafluoropropene by reacting a starting mixture comprising CFC-217ba and hydrogen in the vapor phase at an elevated temperature, optionally in the presence of a hydrogenation catalyst. This process involves preparing the CFC-217ba by the process described above.
|
申请公布号 |
US7129383(B2) |
申请公布日期 |
2006.10.31 |
申请号 |
US20050523223 |
申请日期 |
2005.01.31 |
申请人 |
E. I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
NAPPA MARIO J.;RAO VELLIYUR NOTT MALLIKARJUNA;ROSENFELD H. DAVID;SUBRAMONEY SEKHAR;SUBRAMANIAN MUNIRPALLAM A.;SIEVERT ALLEN C. |
分类号 |
B01J27/132;C07C17/00;B01J23/26;B01J23/86;B01J35/00;B01J37/02;B01J37/03;B01J37/26;C07B61/00;C07C17/04;C07C17/08;C07C17/087;C07C17/10;C07C17/20;C07C17/21;C07C17/23;C07C17/25;C07C17/266;C07C19/08;C07C19/10;C07C21/18 |
主分类号 |
B01J27/132 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|