AZEOTROPE OR AZEOTROPE-LIKE COMPOSITIONS OF TRIFLUOROIODOMETHANE (CF3I) AND WATER
Heterogeneous azeotrope or azeotrope-like compositions comprising trifluoroiodomethane (CF 3 I) and water which may include from about 47.7 wt. % to about 99.0 wt. % trifluoroiodomethane (CF 3 I) and from about 1.0 wt. % to about 52.3 wt. % water and having a boiling point between about 18.0° C. and about 19.0° C. at a pressure of between about 58.0 psia and about 60.0 psia. The azeotrope or azeotrope-like compositions may be used to separate impurities from trifluoroiodomethane (CF 3 I).
1 . A composition comprising a heterogeneous azeotrope or azeotrope-like composition consisting essentially of from about 47.7 wt. % to about 99.0 wt. % trifluoroiodomethane (CF 3 I) and from about 1.0 wt. % to about 52.3 wt. % water.
2 . The composition of claim 1 , wherein the heterogeneous azeotrope or azeotrope-like composition consists essentially of from about 60.4 wt. % to about 95.0 wt. % trifluoroiodomethane (CF 3 I) and from about 5.0 wt. % to about 39.6 wt. % water.
3 . The composition of claim 1 , wherein the heterogeneous azeotrope or azeotrope-like composition consists essentially of from about 70.2 wt. % to about 90.0 wt. % trifluoroiodomethane (CF 3 I) and from about 10.0 wt. % to about 29.8 wt. % water.
4 . The composition of claim 1 , wherein the heterogeneous azeotrope or azeotrope-like composition consists essentially of about 77.0 wt. % trifluoroiodomethane (CF 3 I) and about 23.0 wt. % water and has a boiling point between about 18.0° C. and about 19.0° C. at a pressure of between about 58.0 psia and about 60.0 psia.
5 . A method of forming a heterogeneous azeotrope or azeotrope-like composition comprising the step of combining from about 47.7 wt. % to about 99.0 wt. % trifluoroiodomethane (CF 3 I) and from about 1.0 wt. % to about 52.3 wt. % water to form an azeotrope or azeotrope-like composition consisting essentially of trifluoroiodomethane (CF 3 I) and water and having a boiling point between about −18.0° C. and about 19.0° C. at a pressure of between about 58.0 psia and about 60.0 psia.
6 . The method of claim 5 , wherein the combining step comprises combining from about 60.4 wt. % to about 95.0 wt. % trifluoroiodomethane (CF 3 I) and from about 5.0 wt. % to about 39.6 wt. % water.
7 . The method of claim 5 , wherein the combining step comprises combining from about 70.2 wt. % to about 90.0 wt. % trifluoroiodomethane (CF 3 I) and from about 10.0 wt. % to about 29.8 wt. % water.
8 . The method of claim 5 , wherein the combining step comprises combining about 77.0 wt. % trifluoroiodomethane (CF 3 I) and about 23.0 wt. % water.
9 . A method of separating at least one impurity from a composition including trifluoroiodomethane (CF3I), water, and at least one impurity, comprising the steps of:
modifying the relative amounts of trifluoroiodomethane (CF3I) and water and subjecting the composition to conditions effective to form a heterogeneous azeotrope or azeotrope-like composition consisting essentially of from about 47.7 wt. % to about 99.0 wt. % trifluoroiodomethane (CF3I) and from about 1.0 wt. % to about 52.3 wt. % water; and
separating the heterogeneous azeotrope or azeotrope-like composition from the at least one impurity.
10 . The method of claim 9 , wherein the step of modifying the relative amounts of trifluoroiodomethane (CF 3 I) and water comprises adding trifluoroiodomethane (CF 3 I) to the composition.
11 . The method of claim 9 , wherein the step of modifying the relative amounts of trifluoroiodomethane (CF 3 I) and water comprises adding water to the composition.
12 . The method of claim 9 , wherein the step of modifying the relative amounts of trifluoroiodomethane (CF 3 I) and water comprises adding both trifluoroiodomethane (CF 3 I) and water to the composition.
13 . The method of claim 9 , further comprising, after the separating step, a step of purifying the trifluoroiodomethane (CF 3 I).
14 . The method of claim 13 , wherein the step of purifying the trifluoroiodomethane (CF 3 I) comprises removing water from the trifluoroiodomethane (CF 3 I).
15 . The method of claim 13 , wherein the step of purifying the trifluoroiodomethane (CF 3 I) comprises distillation.
16 . The method of claim 13 , wherein the step of purifying the trifluoroiodomethane (CF 3 I) comprises liquid-liquid extraction.
17 . The method of claim 13 , wherein the step of purifying the trifluoroiodomethane (CF 3 I) comprises exposing the trifluoroiodomethane (CF 3 I) to a drying agent.