METHOD OF DISTILLING LIQUIDS IN INERT GAS ENVIRONMENT Russian patent published in 2018 - IPC B01D3/34 C10G7/06 

FIELD: chemistry.

SUBSTANCE: invention can be used in the rectification of thermally unstable products, distillation of heavy oil residues, utilisation of oil sludge, production of unoxidized bitumen, distillation of glycerol, ethanolamines, glycols, separation of solvents from extracts and raffinates, evaporation of solutions, degassing of gas-liquid mixtures. The method for distilling liquids in an inert gas environment comprises introducing an initial mixture, withdrawing the separation products, introducing a non-condensable inert gas, heating the separation products, converting one or more components of the initial mixture into a gas phase, separating one or more of the gas phase, returning the inert gas to interact with the initial mixture. The ratio of the mass of the introduced inert gas to the mass of the inert gas providing, in aggregate with the vapours of the substance to be removed, the same volume of the vapour phase at the point of its introduction, as in the process without the introduced inert gas at a lower pressure at the same process temperature, is 0.5-5.0. The introduction and/or withdrawal of the inert gas is carried out in several stages during the separation of the initial mixture. The light-volatile component of the initial mixture is released from the inert gas by cooling.

EFFECT: reducing the energy costs and environmental load, when separating mixtures without usinga low pressure and a high temperature.

3 cl, 2 dwg, 3 tbl, 3 ex