PROCESSES FOR OBTAINING CHLORINE FROM MIXTURES OF CHLORINE, WATER, HYDROGEN CHLORIDE AND OXYGEN, AND INCORPORATION OF SUCH PROCESSES INTO ISOCYANATE PRODUCTION PROCESSES

摘要

Processes comprising: (a) providing an initial gas mixture comprising chlorine, water, hydrogen chloride and oxygen; (b) cooling the initial gas mixture to form condensed hydrochloric acid and an intermediate chlorine-containing gas mixture; (c) contacting the intermediate gas mixture with a water-containing phase under a set of conditions selected from a pressure, a temperature and combinations thereof to form a chlorine hydrate-containing phase and a remaining gas mixture; (d) separating the chlorine hydrate-containing phase from the remaining gas mixture; (e) subjecting the chlorine hydrate-containing phase to a set of conditions selected from heat, pressure relief and combinations thereof to release chlorine and form a residual chlorine hydrate/water-containing phase; and (f) separating the released chlorine from the residual chlorine hydrate/water-containing phase.