METHOD OF EXTRACTION OF HYDROGEN FLUORIDE Russian patent published in 2002 - IPC

FIELD: inorganic chemistry, chemical technology. SUBSTANCE: invention relates to method of separation of hydrogen fluoride from gaseous organic compounds and extraction of separated hydrogen fluoride from a mixture. Method involves treatment of gaseous mixture with alkaline metal fluoride solution in hydrogen fluoride, separation of gaseous phase depleted by hydrogen fluoride and comprising organic compound from liquid phase enriched with hydrogen fluoride and the following extraction of hydrogen fluoride from liquid phase. Invention ensures to extract hydrogen fluoride from mixture comprising small amount of hydrogen fluoride and extract hydrogen fluoride from mixture where organic compound and hydrogen fluoride form azeotropic or close to azeotropic mixture. EFFECT: improved method of extraction and separation. 20 cl, 1 dwg