Process for the manufacture of the fluoride of 1996 on the basis of an aqueous solution of the fluoride of 1996 and sulfuric acid.

摘要

P the invention relates to a process for the manufacture of hydrogen fluoride from an aqueous solution of hydrogen fluoride and of sulphuric acid, by distillation at high temperature in order to obtain hydrogen fluoride gas of the desired concentration, characterized in that it is subjected to the aqueous solution of hydrogen fluoride and of sulphuric acid to a stripping with steam in a separation zone (1), it directs the hydrogen fluoride released through the drying zone (2) where it is brought into contact with a portion of concentrated sulphuric acid in order to produce hydrogen fluoride of the desired concentration, and it directs the sulfuric acid of the drying zone (2) to the separation zone (1). / p