METHOD AND INSTALLATION FOR PRODUCTION OF PURE HELIUM Russian patent published in 2022 - IPC B01D53/02 

FIELD: chemistry.

SUBSTANCE: invention relates to the production of pure helium. Method (100, 200) for the production of pure helium is proposed, using first stage (1) of membrane separation, second stage (2) of membrane separation, and third stage (3) of membrane separation, in which the first helium-containing supplied mixture is supplied to first stage (1) of membrane separation, the second helium-containing supplied mixture is supplied to second stage (2) of membrane separation, and the third helium-containing supplied mixture is supplied to third stage (3) of membrane separation, and the first permeate and the first retentate are obtained at first stage (1) of membrane separation, the second permeate and the second retentate are obtained at second stage (2) of membrane separation, and the third permeate and the third retentate are obtained at third stage (3) of membrane separation. The method differs in that the first supplied mixture is obtained using at least part of an initial helium-containing mixture, the second supplied mixture is obtained using at least part of the first permeate, and the third supplied mixture is obtained using at least part of the second permeate, the third permeate is at least partially treated by means of absorption (10) with pressure drop to obtain pure helium and a residual mixture, and at least part of the residual mixture is used in obtaining the second or the third supplied mixture.

EFFECT: improvement and increase in the efficiency of production of pure helium, using stages of membrane separation from corresponding initial mixtures.

15 cl, 2 dwg