Catalytic isomerization of Z-1,1,1,4,4,4-hexafluoro-2-butene to E-1,1,1,4,4,4-hexafluoro-2-butene
AssigneeThe Chemours Company Fc, LLC
InventorsMario Joseph Nappa, Viacheslav A Petrov, Sheng Peng
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Abstract
A process is disclosed for (i) producing E-1,1,1,4,4,4-hexafluoro-2-butene (E-HFO-1336mzz) from Z-1,1,1,4,4,4-hexafluoro-2-butene (Z-HFO-1336mzz), comprising the steps of (a) providing a starting material comprising Z-1,1,1,4,4,4-hexafluoro-2-butene, (b) contacting the starting material with a suitable catalyst in a reaction zone to produce E-HFO-1336mzz; and optionally, (c) recovering the E-HFO-1336mzz. The process may be performed in the gas phase or in the liquid phase and as a batch process or as a continuous process.
Claims28
A process for isomerizing Z-1,1,1,4,4,4-hexafluoro-2-butene to E-1,1,1,4,4,4-hexafluoro-2-butene comprising:
- (a) providing a starting material comprising Z-1,1,1,4,4,4-hexafluoro-2-butene;
- (b) contacting the starting material with a suitable catalyst in a reaction zone to produce E-HFO-1336mzz;
- and optionally,
- (c) recovering the E-HFO-1336mzz,
- wherein, when the contacting step is performed in the gas phase, the catalyst comprises chromium and less than 40% by weight alumina;
- wherein when the contacting step is performed in the liquid phase, the catalyst comprises a metal halide wherein the metal halide is aluminum halide, antimony halide, tin halide, tantalum halide, titanium halide, niobium halide, molybdenum halide, iron halide, fluorinated chrome halide, or combinations thereof.
Dependencies are inferred from the claim text.