Improved process for the manufacture of anhydrous Hydrogen fluoride with high purity, Low content of arsenic

摘要

The present Invention relates to improvements in the process for Manufacturing high purity anhydrous Hydrogen fluoride.With low content of impurity of arsenic from Arsenic contaminated with anhydrous Hydrogen fluoride.Characterized in that the process comprises contacting; anhydrous Hydrogen fluoride with an effective amount of hydrogen peroxide in the presence of a catalyst containing quantities ofCtivas Molybdenum or Molybdenum compound and an inorganic Compound phosphate at a temperature and for a period of time sufficient to oxidize volatile Arsenic and Trivalent impurityL anhydrous Hydrogen fluoride to pentavalent Arsenic Compounds non-volatile,Distilling the resultant mixture and Recover high purity anhydrous Hydrogen fluoride with low impurity content of arsenic.