METHOD FOR DESORBTION OF CHLORINE HYDROCARBON FROM WATER SOLUTIONS AND METHOD FOR CONCENTRATION OF SALT ACID Russian patent published in 2018 - IPC C01B7/01 C01B7/03 B01D3/02 

FIELD: biochemistry.

SUBSTANCE: invention relates to a method for desorbing hydrogen chloride from aqueous solutions of hydrochloric acid and/or hydrolyzing salts thereof and can be used, in particular, in the processes of distillation, rectification and concentration of hydrochloric acid, including in the processing of aqueous solutions of hydrolyzed chlorides. Method comprises a) heating an aqueous solution of hydrochloric acid and/or at least one hydrolysable salt thereof in a sealed vessel to a predetermined temperature and until a pressure is reached, equal to the value of the equilibrium vapor pressure over the liquid phase at a given temperature. Then b) inject into the vessel at least one non-condensable and inert gas with respect to the components of the liquid phase, until the pressure exceeds the value of the equilibrium pressure of water vapor at a given temperature for pure water. Further, d) a mixture of gases is extracted from the vessel, comprising hydrogen chloride and said non-condensable and inert gas with respect to the components of the liquid phase.

EFFECT: technical result consists in the creation of an industrially realized energy-efficient method of desorption of hydrogen chloride from aqueous solutions using standard corrosion-resistant equipment.

27 cl, 1 dwg, 11 ex