Process for the removal of contaminant from a hydrochlorofluoroolefin by extractive distillation

A method for removing a contaminant from a hydrochlorofluoroolefin comprising:

• extracting trichlorofluoromethane (R11) from a mixture comprising the trichlorofluoromethane (R11) and trans-1,1,1-trifluoro-3-chloro-2-propene (1233zd(E)) using extractive distillation in the presence of an extractive solvent comprising an organochloride selected from the group consisting of carbon tetrachloride, chloroform, methyl chloroform, and mixtures thereof to form a purified trans-1,1,1-trifluoro-3-chloro-2-propene (1233zd(E)).

A distillation process comprising:

• feeding a feed mixture comprising a hydrochlorofluoroolefin comprising a contaminant to a first distillation column;
• and
• extracting the contaminant from the feed mixture in the first distillation column using an extractive solvent comprising an organochloride selected from the group consisting of carbon tetrachloride, chloroform, methyl chloroform, and mixtures thereof to form an overhead stream comprising a purified hydrochlorofluoroolefin and a bottoms stream comprising the contaminant and the extractive solvent.