METHOD AND DEVICE FOR SEPARATION OF MULTI-CHARGE CATIONS FROM MONOETHYLENEGLYCOL Russian patent published in 2015 - IPC C07C31/20 C07C29/76 C07C29/80 

FIELD: chemistry.

SUBSTANCE: monoethyleneglycol is applied to prevent the formation of hydrates in gas-transporting pipelines, condensate and water. It can also contribute to the protection of the pipelines from corrosion. The claimed method includes the following stages: a) preparation of a water solution of monoethyleneglycol, which contains dissolved gas and salts of bi-charged cations, b) heating the water solution of monoethyleneglycol to obtain a heated mixture, which causes precipitation of, at least, a part of salts and release of, at least, a part of dissolved gas, in particular, carbon dioxide, c) separation of the released gas from monoethyleneglycol , d) separation of, at least, a part of precipitated salts from monoethyleneglycol, e) distillation of, at least, a part of water from the heated mixture to obtain hot dehydrated monoethyleneglycol. The first part of hot dehydrated monoethyleneglycol is directed back into the water solution of monoethyleneglycol, supplied from the stage (a), to obtain, at least, a part of heat for heating the water solution of monoethyleneglycol at the stage (b).

EFFECT: invention makes it possible to separate cations with the application of the simple and energy-preserving technology.

14 cl, 1 dwg, 1 ex