Method for reducing carbon deposits on catalyst in recycling HFC-23
AssigneesSinochem Lantian Co., Ltd., Zhejiang Lantian Environmental Protection Hi-Tech Co., Ltd., Zhejiang Research Institute of Chemical Industry Co., Ltd.
InventorsJianjun Zhang, Wenfeng Han, Shucheng Wang, Wucan Liu, Feixiang Zhou
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Abstract
Disclosed is a method for reducing carbon deposits on a catalyst in recycling HFC-23. The recycling is realized by means of a fluorine-chlorine exchange reaction with HFC-23 and a halogenated hydrocarbon. The catalyst for the fluorine-chlorine exchange reaction comprises a main body catalyst and a precious metal. The precious metal is selected from at least one of Pt, Pd, Ru, Au or Rh, and has an addition amount of 0.01-2 wt %. During the fluorine-chlorine exchange reaction, hydrogen gas is introduced. The invention has advantages of good catalyst stability, long life, etc.
Claims10
A method for reducing carbon deposits on a catalyst in recycling HFC-23, the recycling is realized by means of a fluorine-chlorine exchange reaction with HFC-23 and a halogenated hydrocarbon, wherein the catalyst for the fluorine-chlorine exchange reaction comprises a main body catalyst and a precious metal, the precious metal is selected from at least one of Pt, Pd, Ru, Au or Rh, and has an addition amount of 0.01-2 wt %;
- during the fluorine-chlorine exchange reaction, hydrogen gas is introduced.
Dependencies are inferred from the claim text.