A process for the recovery of hcl from a dilute solution...

Details A process for the recovery of hcl from a dilute solution... A process for the recovery of hcl from a dilute solution...

B - Operations, Transporting

01

D

B01D 11/04 (2006.01) B01D 3/34 (2006.01) C01B 7/07 (2006.01) C07C 17/38 (2006.01) C12P 7/10 (2006.01)

Patent

CA 2679068

The invention provides a process for the recovery of HCI from a dilute solution thereof, comprising: a) bringing a dilute aqueous HCI solution into contact with a substantially immiscible extractant, said extractant comprising: 1) an oil soluble amine which amine is substantially water insoluble both in free and in salt form; 2) an oil soluble organic acid which acid is substantially water insoluble both in free and in salt form; and 3) a solvent for the amine and organic acid; whereupon HCI selectively transfers to said extractant to form an HCI-carrying extractant; and b) treating said HCI-carrying extractant to obtain gaseous HCI.

La présente invention porte sur un procédé de récupération d'HCl dans une solution diluée de celui-ci. Ce procédé comporte l'opération consistant à amener une solution aqueuse diluée d'HCl en contact avec un agent d'extraction sensiblement non miscible, ledit agent d'extraction comprenant : 1) une amine soluble dans l'huile et sensiblement insoluble dans l'eau à la fois dans sa forme libre et dans sa forme salifiée ; 2) un acide organique soluble dans l'huile et sensiblement insoluble dans l'eau à la fois dans sa forme libre et dans sa forme salifiée ; et 3) un solvant pour l'amine et l'acide organique, sur quoi HCl se transfère de façon sélective dans ledit agent d'extraction pour former un agent d'extraction portant HCl. Le procédé comporte également l'opération consistant à traiter ledit agent d'extraction portant HCl pour obtenir HCl gazeux.

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