Recovery of HF and HCl from gaseous mixtures thereof

A process is disclosed for recovering HF and HCl in substantially purified form from a gaseous mixture containing HF, HCl and halogenated organic vapors. The process comprises: A. feeding the gaseous mixture to the lower part of a rectification column to provide an upward flow of gases therein, the...

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Bibliographische Detailangaben
Hauptverfasser:	MCGREGOR, ALASTAIR J. H, TROLLOPE, GREGORY A. R, ROBOTA, STEPHEN
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CHEMISTRY COMBINED HEATING AND REFRIGERATION SYSTEMS COMPOUNDS THEREOF GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEAT PUMP SYSTEMS HEATING INORGANIC CHEMISTRY LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING METALLURGY MIXTURES BY PRESSURE AND COLD TREATMENT NON-METALLIC ELEMENTS REFRIGERATION OR COOLING TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS WEAPONS
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Beschreibung
Zusammenfassung:	A process is disclosed for recovering HF and HCl in substantially purified form from a gaseous mixture containing HF, HCl and halogenated organic vapors. The process comprises: A. feeding the gaseous mixture to the lower part of a rectification column to provide an upward flow of gases therein, the column having a temperature in the upper part of from about -40 DEG C. to about -85 DEG C., and having a temperature in its lower part in the range of from about -30 DEG C. to about 19 DEG C., the column also having a countercurrent flow of a liquid and a gas, B. withdrawing liquid HF from the bottom of the rectification column, C. withdrawing a gas from the top of the rectification column, and feeding the thus withdrawn gas to a condenser, D. condensing at least a portion of the withdrawn gas of step C to a liquid, E. feeding a portion of the condensed liquid of step D to the upper part of the rectification column, and F. recovering HCl gas from the condenser.