Preparation method of trifluoro methanesulfonic acid

The invention provides a preparation method of trifluoro methanesulfonic acid. The preparation method comprises the following steps of: dissolving trifluoromethyl alkyl halide in acetonitrile, then sequentially adding an inorganic sulfur reducing agent, sodium bicarbonate and water, reacting at room...

Full description

Saved in:
Bibliographic Details
Main Authors WEI WEIQUN, CHEN HONGBIN
Format Patent
LanguageChinese
English
Published 06.02.2013
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
Online AccessGet full text

Cover

More Information
Summary:The invention provides a preparation method of trifluoro methanesulfonic acid. The preparation method comprises the following steps of: dissolving trifluoromethyl alkyl halide in acetonitrile, then sequentially adding an inorganic sulfur reducing agent, sodium bicarbonate and water, reacting at room temperature for 2-50 hour to obtain sulfinate, then adding an oxidizing agent for further oxidizing to generate sulfonate, acidifying the generated sulfonate by utilizing an acidifying reagent so as to prepare trifluoro methanesulfonic acid, and carrying out atmospheric-pressure or reduced-pressure distillation to collect CF3SO3H, wherein the molar ratio of the acidifying reagent to sulfonate is (10-1.5):1, the acidification reaction temperature is 0-200 DEG C and the reaction time is 1-30 hours. Compared with the prior art, the preparation method of trifluoro methanesulfonic acid has the advantages that raw materials are easily available, the production cost is low, the intermediate reaction process is easier to
Bibliography:Application Number: CN20121467184