VERFAHREN UND VORRICHTUNG FUER LUFTDESTILLATION.

摘要

PCT No. PCT/FR86/00247 Sec. 371 Date Feb. 6, 1987 Sec. 102(e) Date Feb. 6, 1987 PCT Filed Jul. 9, 1986 PCT Pub. No. WO87/00609 PCT Pub. Date Jan. 29, 1987.Liquid oxygen and gaseous nitrogen are remixed in a roughly reversible manner in an auxiliary column (3); rich liquid without argon, withdrawn at an intermediate place of the auxiliary column is remixed in another auxiliary column section (4) with impure nitrogen of the top of a low pressure column (6), and the gas of the top of this auxiliary section constitutes a residual gas (R1) of the plant. Application in the production of argon.