Process for obtaining a purified hydrofluoroalkane

Process for obtaining a purified hydrofluoroalkane

  • CN 1,678,552 A
  • Filed: 08/10/2001
  • Published: 10/05/2005
  • Est. Priority Date: 08/10/2000
  • Status: Active Application
First Claim
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1. obtain a kind of purifying in addition and remove the organic impurity that comprises (chlorine) fluoroolefins, the method that includes the fluoric ether of at least three carbon atoms, according to said method, make this fluoric ether that contains organic impurity stand at least a following purification process that is selected from:

  • (a) in the presence of initiator, handle with chlorine;

    (b) same hydrogen fluoride reaction;

    (c) from the distillation tower top or side distillation that the fluoric ether of purifying is shifted out;

    (d) extractive distillation;

    (e) absorption on solid adsorbent;

    (f) with the reaction of oxygenatedchemicals;

    (g) with can be at least and the gas-phase reaction of the reagent of some such organic impurity reaction, but except the reaction of elemental chlorine.

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