A process for the preparation of a higher concentrated hydrochloric acid from a hydrochloric acid with a concentration which is located below the azeotropic concentration

摘要

in a process for the production of a more concentrated hydrochloric acid in a hydrochloric acid with a below the azeotropen concentration the concentrationin particular, the washing fluid from a washing at least a hcl containing exhaust gas, especially exhaust gas of an incinerator.is the production of high concentrated acid in a simple manner and in eradication of hcl in liquid phase forthat the ausgangssu00e4ure (1) in a first stage (2) with energy intake (3; 5) water (5) is expelled.in a second stage (4) with a circuit (k1) of high boiling temperature heated aqueous solution of water and hcl is expelled and the steam exhaust (3) of the second stage (4) of the firststage as heizdampf is supplied.that the first stage (2), draining aufkonzentrierte hydrochloric acid (9) and the circuit (k1) of the second stage (4) for draining calciumchloridhaltige solution (14) and (15), and a third stufe (17) with a cycle (k2) is fed, in the intake of heat (20) hcl and water be exorcised.and that the exhaust gas (21) of the third stage (17) of a condensation (22) for the removal of water and then a absorptionsstufe (24) is supplied.in the intake of water (25) the higher concentrated produktsalzsu00e4ure (26) is generated.with solution (29) from the circuit (k2) of the third stage (17) in the circuit (k1) of the second stage (4) is reduced, and...