Azeotropic or azeotropic composition of trifluoroiodomethane (CF3I) and water

Abstract

The present invention provides azeotropic or azeotropic-like compositions. [Solution] A heterogeneous azeotropic or azeotropic-like composition containing trifluoroiodomethane (CF3I) and water, which may contain approximately 47.7% to 99.0% by weight of trifluoroiodomethane (CF3I) and approximately 1.0% to 52.3% by weight of water, and having a boiling point of approximately 18.0°C to 19.0°C at a pressure of approximately 58.0 psia to approximately 60.0 psia. The azeotropic or azeotropic-like composition can be used to separate impurities from trifluoroiodomethane (CF3I).

Description

Technical Field

[0001] (Cross - Reference to Related Applications) This application claims priority to U.S. Patent Application No. 17 / 466,694, filed Sep. 03, 2021, which claims the benefit of Provisional Patent Application No. 63 / 077,358, filed Sep. 11, 2020, both of which are hereby incorporated by reference in their entirety.

[0002] (Field of the Invention) The present disclosure relates to azeotropic or azeotrope - like compositions, particularly azeotropic or azeotrope - like compositions containing an effective amount of trifluoroiodomethane (CF3I) and water.

Background Art

[0003] Fluorocarbon - based fluids have found extensive use in industry in many applications, including refrigerants, aerosol propellants, foaming agents, heat transfer media, gaseous dielectrics, and fire suppressants.

[0004] In the industry, there is a continuous pursuit of new fluorocarbon - based mixtures that provide alternatives and are considered environmentally safer substitutes for CFCs, HCFCs, and HFCs currently in use. Mixtures containing hydrofluorocarbons, fluoroolefins, iodide - containing compounds, and other fluorinated compounds with low ozone depletion potential and low global warming potential are of particular interest. Such mixtures are the subject of the present disclosure.

[0005] Although iodide - containing compounds have potentially great benefits, the purification of iodide - containing compounds such as trifluoroiodomethane (CF3I) is difficult, and there is a need for techniques to remove impurities from trifluoroiodomethane (CF3I).

Summary of the Invention

[0006] The present disclosure provides a heterogeneous azeotropic or azeotrope - like composition of trifluoroiodomethane (CF3I) and water.

[0007] In the art, it is well recognized that it is impossible to predict the formation of azeotropes, and the inventors have unexpectedly discovered that trifluoroiodomethane (CF3I) and water form azeotropic or azeotropic-like compositions, particularly heterogeneous azeotropic or azeotropic-like compositions.

[0008] This disclosure provides compositions comprising an azeotropic or azeotropic-like composition containing, essentially consisting of, or comprising an effective amount of trifluoroiodomethane (CF3I) and water.

[0009] An azeotropic or azeotropic composition may contain about 47.7% to about 99.0% by weight of trifluoroiodomethane (CF3I) and about 1.0% to about 52.3% by weight of water, about 60.4% to about 95.0% by weight of trifluoroiodomethane (CF3I) and about 5.0% to about 39.6% by weight of water, about 70.2% to about 90.0% by weight of trifluoroiodomethane (CF3I) and about 10.0% to about 29.8% by weight of water, or an azeotropic or azeotropic composition may essentially consist of about 77.0% by weight of trifluoroiodomethane (CF3I) and about 23.0% by weight of water. An azeotropic or azeotropic composition may essentially consist of the above amounts of trifluoroiodomethane (CF3I) and water, or the above amounts of trifluoroiodomethane (CF3I). It may consist of oloiodomethane (CF3I) and water.

[0010] Azeotropic mixtures have a boiling point of approximately 18.0°C to 19.0°C at a pressure of approximately 58.0 psia to approximately 60.0 psia.

[0011] In a further form, the disclosure provides a method for forming an azeotropic or azeotropic-like composition, the method comprising the step of combining trifluoroiodomethane (CF3I) and water to form an azeotropic or azeotropic-like composition comprising, essentially comprising, or consisting of trifluoroiodomethane (CF3I) and water. The azeotropic-like azeotropic composition may have a boiling point of about 18.0°C to about 19.0°C at a pressure of about 58.0 psia to about 60.0 psia.

[0012] The disclosure further provides a method for separating an impurity from a composition comprising trifluoroiodomethane (CF3I), water, and at least one impurity, the method comprising the steps of: changing the relative amounts of trifluoroiodomethane (CF3I) and water to conditions effective for forming an azeotropic or azeotropic-like composition essentially consisting of or comprising effective amounts of trifluoroiodomethane (CF3I) and water; and separating the azeotropic or azeotropic-like composition from at least one impurity, the separation step may include at least one of phase separation, distillation, and fractional distillation.

[0013] The disclosure further provides a method for separating an impurity from a composition comprising trifluoroiodomethane (CF3I) and at least one impurity, the method comprising the steps of: adding an effective amount of water to the composition; changing the relative amounts of trifluoroiodomethane (CF3I) and water to conditions effective for forming an azeotropic or azeotropic-like composition essentially consisting of or comprising an effective amount of trifluoroiodomethane (CF3I) and water; and separating the azeotropic or azeotropic-like composition from at least one impurity, the separation step of which may include at least one of phase separation, distillation, and fractional distillation.

[0014] In the method described above, the step of changing the relative amounts of trifluoroiodomethane (CF3I) and water may include adding trifluoroiodomethane (CF3I) to the composition, adding water to the composition, or adding both trifluoroiodomethane (CF3I) and water to the composition.

[0015] After separation, the properties of the composition can be altered to allow for the removal of water and further purification of trifluoroiodomethane (CF3I). Preferred methods for purifying trifluoroiodomethane (CF3I) may include distillation, liquid-liquid extraction, or exposure to a drying agent. [Modes for carrying out the invention]

[0016] It has been found that trifluoroiodomethane (CF3I) forms heterogeneous azeotropic and azeotropic-like compositions or mixtures with water, and that the present disclosure provides heterogeneous azeotropic or azeotropic-like compositions comprising trifluoroiodomethane (CF3I) and water. The composition may essentially consist of trifluoroiodomethane (CF3I) and water, or the composition may consist of trifluoroiodomethane (CF3I) and water.

[0017] The inventors of the present invention have experimentally discovered that trifluoroiodomethane (CF3I) and water form a heterogeneous azeotropic or azeotropic-like composition.

[0018] An "azeotrope" (or "azeotropic") composition is two or more It is a unique combination of components. Azeotropes can be either homogeneous (having one liquid phase) or heterogeneous (having two liquid phases). Azeotropic compositions can be characterized by various techniques. This is possible. For example, under a given pressure, an azeotropic composition boils at a constant characteristic temperature higher than the component with the higher boiling point (maximum boiling point azeotrope), or at a constant characteristic temperature lower than the component with the lower boiling point (minimum boiling point azeotrope). However, in the case of heterogeneous azeotropes, the boiling point of the azeotrope is always below the boiling point of the component with the lower boiling point. In the case of heterogeneous azeotropes, at this characteristic temperature, the respective compositions of the two liquid and gas phases remain constant at boiling. Azeotropic compositions do not fractionally distill during boiling or evaporation. Therefore, the components of an azeotropic composition cannot be separated by phase change.

[0019] A heterogeneous azeotrope consists of two liquid phases and one gas phase, or one solid, one liquid, and one gas phase, all in equilibrium. For a heterogeneous azeotrope at a given temperature and pressure, the composition of each of the two liquid phases and the composition of the gas phase are all constant. When a heterogeneous azeotrope is formed, at a certain pressure, the boiling point of the heterogeneous azeotrope is lower than that of the component with the lower boiling point ("minimum boiling point azeotrope").

[0020] An azeotropic composition is also characterized by having, at the characteristic azeotropic temperature, a liquid-phase bubble point pressure (bubble point pressure ) that is identical to the dew point pressure of the gas phase.

[0021] The behavior of an azeotropic composition is in contrast to that of a non-azeotropic composition in which the liquid composition changes significantly during boiling or evaporation.

[0022] For the purposes of the present disclosure, an azeotropic composition boils at a constant characteristic temperature lower than the boiling points of two or more components (minimum-boiling azeotrope), and is thereby characterized as a composition having the same composition in both the gas phase and the liquid phase.

[0023] However, those skilled in the art will understand that at different pressures, both the composition and the boiling point of an azeotropic composition change to some extent. Thus, depending on temperature and / or pressure, an azeotropic composition can have a variable composition. Thus, those skilled in the art will understand that an azeotropic composition can be defined using a composition range rather than a fixed composition. Further, an azeotrope can also be defined in terms of the exact weight percentages of the components of a composition characterized by a fixed boiling point at a particular pressure.

[0024] Azeotropic or azeotrope-like compositions can be identified using a number of different methods.

[0025] For the purposes of the present disclosure, azeotropic or azeotrope-like compositions are identified experimentally using an ebulliometer (Walas, Phase Equilibria in Chemical Engineering, Butterworth-Heinemann, 1985, 533 - 544). An ebulliometer is designed to provide a very accurate measurement of the boiling point of a liquid by measuring the vapor-liquid equilibrium temperature.

[0026] The individual boiling points of each of the components are measured at a constant pressure. As will be understood by those skilled in the art, for a binary azeotropic or azeotrope-like composition, the boiling point of one of the components of the composition is measured first. Then, the second component of the composition is added in various amounts, and at the said constant pressure, using an ebulliometer, the boiling point of each of the resulting compositions is measured. In the case of a ternary azeotrope, the initial composition consists of a binary blend, and the third component is added in various amounts. The boiling point of each of the resulting ternary compositions is measured using an ebulliometer at the said constant pressure.

[0027] The measured boiling points are plotted against the composition of the tested composition, for example, in the case of a binary azeotrope, against the amount of the second component added to the composition (expressed in either weight % or mole %). The presence of an azeotropic composition can be identified by observing a maximum boiling temperature or a minimum boiling temperature that is higher or lower than the boiling point of either of the individual components.

[0028] As will be understood by those skilled in the art, the identification of an azeotropic or azeotrope-like composition is done by comparing the change in the boiling point of the composition when the second component is added to the first component with the boiling point of the first component. Thus, there is no need to calibrate the system to the reported boiling point of a particular component in order to measure the change in boiling point.

[0029] As described above, at the maximum boiling point or the minimum boiling point, the composition of the gas phase is the same as the composition of the liquid phase. Thus, an azeotrope-like composition is a composition of components that provides a substantially constant minimum boiling point or maximum boiling point, i.e., a boiling point of about 18.0 °C to about 19.0 °C at a pressure of about 58.0 psia to about 60.0 psia, and at its substantially constant boiling point, the composition of the gas phase is substantially the same as the composition of the liquid phase.

[0030] This disclosure provides azeotropic or azeotropic compositions comprising an effective amount of trifluoroiodomethane (CF3I) and water to form an azeotropic or azeotropic-like composition. As used herein, the term “effective amount” refers to the amount of each component that, when combined with the other components, results in the formation of an azeotropic or azeotropic-like mixture.

[0031] These azeotropic or azeotropic-like compositions may essentially consist of a combination of trifluoroiodomethane (CF3I) and water, or may consist of a combination of trifluoroiodomethane (CF3I) and water.

[0032] As used herein, the term "essentially consisting of" in relation to the components of an azeotropic or azeotropic-like composition or mixture means that the composition may contain additional components, provided that the components are present in an azeotropic ratio or azeotropic-like ratio and that the additional components do not form a new azeotropic or azeotropic system. For example, an azeotropic mixture essentially consisting of two compounds forms a two-component azeotrope and may optionally contain one or more additional components, provided that the additional components do not make the mixture non-azeotropic and do not form an azeotrope with any one or both of the compounds (e.g., no three-component or more azeotropes).

[0033] This disclosure also provides a method for forming an azeotropic or azeotropic-like composition by mixing, combining, or blending effective amounts of trifluoroiodomethane (CF3I) and water. Any of the wide variety of methods known in the art for combining two or more components to form a composition can be used in this method. For example, trifluoroiodomethane (CF3I) and water can be mixed, blended, or otherwise combined manually and / or mechanically as part of a batch or continuous reaction and / or process, or through a combination of two or more such steps. These components may be provided in the required amounts, for example, by weighing and then combining these amounts.

[0034] Azeotropic or azeotropic compositions have a boiling point of about 18.0°C to about 19.0°C at a pressure of about 58.0 psia to about 60.0 psia, and contain, essentially consist of, or consist of, about 47.7% to about 99.0% by weight of trifluoroiodomethane (CF3I) and about 1.0% to about 52.3% by weight of water, about 60.4% to about 95.0% by weight of trifluoroiodomethane (CF3I) and about 5.0% to about 39.6% by weight of water, about 70.2% to about 90.0% by weight of trifluoroiodomethane (CF3I) and about 10.0% to about 29.8% by weight of water, or azeotropic or azeotropic compositions may essentially consist of about 77.0% by weight of trifluoroiodomethane (CF3I) and about 23.0% by weight of water.

[0035] The Disclosure also provides compositions comprising an azeotropic or azeotropic-like composition. For example, compositions comprising at least about 5% by weight of an azeotropic or azeotropic-like composition, or at least about 15% by weight of an azeotropic or azeotropic-like composition, or at least about 50% by weight of an azeotropic or azeotropic-like composition, or at least about 70% by weight of an azeotropic or azeotropic-like composition, or at least about 90% by weight of an azeotropic or azeotropic-like composition are provided.

[0036] Azeotropic or azeotropic-like compositions disclosed herein, comprising, essentially, or consisting of an effective amount of trifluoroiodomethane (CF3I) and water, may be used to separate impurities from trifluoroiodomethane (CF3I). Such impurities may include, for example, trifluoromethane (HFC-23), chlorotrifluoromethane (CFC-13), hexafluoroethane (HFC-116), CF2HI, CHF2I, C2F5I, HCFC-22, and / or CH3Cl.

[0037] The preparation of azeotropic or azeotropic-like compositions containing, essentially consisting of, or comprising an effective amount of trifluoroiodomethane (CF3I) and water allows for the removal of impurities from trifluoroiodomethane (CF3I) using separation techniques such as azeotropic distillation, phase separation, or fractional distillation.

[0038] In particular, azeotropic or azeotropic-like compositions containing, essentially consisting of, or comprising an effective amount of trifluoroiodomethane (CF3I) and water may be formed from a composition containing trifluoroiodomethane (CF3I), water, and at least one impurity. For example, trifluoroiodomethane (CF3I), water, or both may be added to a composition to form an azeotropic or azeotropic-like composition. After the formation of an azeotropic or azeotropic-like composition, it may be separated from other chemical compounds by preferred methods such as distillation, phase separation, or fractional distillation.

[0039] After separation, the properties of the composition can be altered to allow for the removal of water and further purification of trifluoroiodomethane (CF3I). Preferred methods for purifying trifluoroiodomethane (CF3I) may include distillation, liquid-liquid extraction, or exposure to a drying agent.

[0040] In one example, the present disclosure provides a method for separating impurities from trifluoroiodomethane (CF3I), the method comprising the steps of: providing a composition of crude trifluoroiodomethane (CF3I) and water; changing the relative amounts of trifluoroiodomethane (CF3I) and water to subject the composition to conditions effective in forming an azeotropic or azeotropic-like composition essentially consisting of or comprising effective amounts of trifluoroiodomethane (CF3I) and water; and separating the azeotropic or azeotropic-like composition from at least one impurity by separation techniques such as phase separation, distillation, or fractional distillation. The step of changing the relative amounts of trifluoroiodomethane (CF3I) and water may include adding trifluoroiodomethane (CF3I) to the composition, adding water to the composition, or adding both trifluoroiodomethane (CF3I) and water to the composition.

[0041] In another example, the present disclosure provides a method for separating impurities from trifluoroiodomethane (CF3I), the method comprising the steps of: providing a composition of crude trifluoroiodomethane (CF3I); adding an effective amount of water to the composition; changing the relative amounts of trifluoroiodomethane (CF3I) and water to subject the composition to conditions effective for forming an azeotropic or azeotropic-like composition essentially consisting of or comprising an effective amount of trifluoroiodomethane (CF3I) and water; and separating the azeotropic or azeotropic-like composition from at least one impurity by separation techniques such as phase separation, distillation, or fractional distillation. The step of changing the relative amounts of trifluoroiodomethane (CF3I) and water is the step of trifluoroiodomethane This may include adding trifluoroiodomethane (CF3I) to the composition, adding water to the composition, or adding both trifluoroiodomethane (CF3I) and water to the composition.

[0042] Subsequently, the azeotropic or azeotropic composition may be subjected to further separation or purification steps to obtain purified trifluoroiodomethane (CF3I). After separation, the properties of the composition can be altered to allow for the removal of water and further purification of trifluoroiodomethane (CF3I). Preferred methods for purifying trifluoroiodomethane (CF3I) may include distillation, liquid-liquid extraction, or exposure to a drying agent.

[0043] The following non-limiting embodiments are helpful in illustrating the present invention. [Examples]

[0044] Example 1 - Vapor-liquid equilibrium (VLE) test at 59.92 psia A quartz thermometer was further equipped in the vapor-liquid equilibrium (VLE) test, which included a vacuum-jacketed tube with a capacitor at its upper end. The capacitor was cooled by circulating a glycol-water mixture set to the desired temperature. The pressure was regulated by a pressure controller set to approximately 59.9 psia.

[0045] In the first experiment, 123.55 g of trifluoromethane (CF3I) was added to the boiler, and the equilibrium temperature was recorded at a set pressure of 59.92 psia. Water was then gradually added via a syringe pump, and a new equilibrium temperature was recorded. In the second experiment, 44.92 grams of water was added to the boiler, and the equilibrium temperature was recorded at a set pressure of 59.92 psia. Trifluoroiodomethane (CF3I) was then gradually added via a syringe pump, and a new equilibrium temperature was recorded. The results are shown below in Table 1.

[0046] [Table 1]

[0047] Example 2 - Separation and purification of trifluoroiodomethane (CF3I) A composition containing crude trifluoroiodomethane (CF3I), at least one impurity, and water is purified. In the first step, the relative amounts of trifluoroiodomethane (CF3I) and water are adjusted. The relative amounts of trifluoroiodomethane (CF3I) and water can be adjusted by adding water, adding trifluoroiodomethane (CF3I), or both. The composition is then exposed to conditions effective in forming an azeotropic or azeotropic-like mixture. The azeotropic or azeotropic-like mixture can then be separated from at least one impurity by distillation, phase separation, or fractional distillation. Once the azeotropic or azeotropic-like mixture is separated from the impurity, the trifluoroiodomethane is purified by separating the components of the azeotropic or azeotropic-like mixture, trifluoroiodomethane (CF3I) and water, from each other. The separation of trifluoroiodomethane (CF3I) and water can then be achieved by distillation, liquid-liquid extraction, or exposure to a drying agent.

[0048] manner Embodiment 1 is a composition comprising a heterogeneous azeotropic or azeotropic-like composition essentially consisting of an effective amount of trifluoroiodomethane (CF3I) and water.

[0049] Embodiment 2 is the composition of Embodiment 1, wherein the azeotropic or azeotropic-like composition has a boiling point of about 18.0°C to 19.0°C at a pressure of about 58.0 psia to about 60.0 psia.

[0050] Embodiment 3 is a composition of Embodiment 1 or Embodiment 2, wherein the azeotropic or azeotropic composition essentially consists of about 47.7% to about 99.0% by weight of trifluoroiodomethane (CF3I) and about 1.0% to about 52.3% by weight of water.

[0051] Embodiment 4 is any of the compositions from Embodiments 1 to 3, wherein the azeotropic or azeotropic-like composition consists essentially of about 60.4% to about 95.0% by weight of trifluoroiodomethane (CF3I) and about 5.0% to about 39.6% by weight of water.

[0052] Embodiment 5 is any composition from Embodiments 1 to 4, wherein the azeotropic or azeotropic-like composition consists essentially of about 70.2% to about 90.0% by weight of trifluoroiodomethane (CF3I) and about 10.0% to about 29.8% by weight of water.

[0053] Embodiment 6 is any of the compositions from Embodiments 1 to 5, wherein the azeotropic or azeotropic-like composition essentially consists of about 77.0% by weight of trifluoroiodomethane (CF3I) and about 23.0% by weight of water.

[0054] Embodiment 7 is a method for forming a heterogeneous azeotropic or azeotropic-like composition, the method comprising the step of combining trifluoroiodomethane (CF3I) and water to form an azeotropic or azeotropic-like composition consisting of an effective amount of trifluoroiodomethane (CF3I) and water having a boiling point of about 18.0°C to about 19.0°C at a pressure of about 58.0 psia to about 60.0 psia.

[0055] Embodiment 8 is the method of Embodiment 7, wherein the combining step includes combining about 47.7% to about 99.0% by weight of trifluoroiodomethane (CF3I) and about 1.0% to about 52.3% by weight of water.

[0056] Embodiment 9 is the method of Embodiment 7 or Embodiment 8, wherein the combining step includes combining about 60.4% to about 95.0% by weight of trifluoroiodomethane (CF3I) and about 5.0% to about 39.6% by weight of water.

[0057] Embodiment 10 is any of the methods in Embodiments 7 to 9, and the combining step includes combining about 70.2% to about 90.0% by weight of trifluoroiodomethane (CF3I) and about 10.0% to about 29.8% by weight of water.

[0058] Embodiment 11 is any of the methods in Embodiments 7 to 10, wherein the mixing step includes combining about 77.0% by weight of trifluoroiodomethane (CF3I) and about 23.0% by weight of water.

[0059] Embodiment 12 is a method for separating impurities from a composition comprising trifluoroiodomethane (CF3I), water, and at least one impurity, the method of changing the relative amounts of trifluoroiodomethane (CF3I) and water to make the composition a heterogeneous azeotropic or azeotropic composition essentially consisting of or comprising effective amounts of trifluoroiodomethane (CF3I) and water. The process includes a step of subjecting the material to conditions effective for forming a substance, and a step of separating the azeotropic or azeotropic composition from impurities.

[0060] Embodiment 13 is the method of Embodiment 12, wherein the step of changing the relative amounts of trifluoroiodomethane (CF3I) and water includes adding trifluoroiodomethane (CF3I) to the composition.

[0061] Embodiment 14 is the method of Embodiment 12 or Embodiment 13, wherein the step of changing the relative amounts of trifluoroiodomethane (CF3I) and water includes adding water to the composition.

[0062] Embodiment 15 is any of the methods from Embodiments 12 to 14, wherein the step of changing the relative amounts of trifluoroiodomethane (CF3I) and water includes adding both trifluoroiodomethane (CF3I) and water to the composition.

[0063] Embodiment 16 is any of the methods from Embodiments 12 to 15, the method further comprising an additional step of purifying trifluoroiodomethane (CF3I) after the separation step.

[0064] Embodiment 17 is any of the methods from Embodiments 12 to 16, wherein the step of purifying trifluoroiodomethane (CF3I) includes removing water from trifluoroiodomethane (CF3I).

[0065] Embodiment 18 is any of the methods described in Embodiments 12 to 17, wherein the step of purifying trifluoroiodomethane (CF3I) includes distillation.

[0066] Embodiment 19 is any of the methods described in Embodiments 12 to 18, wherein the step of purifying trifluoroiodomethane (CF3I) includes liquid-liquid extraction.

[0067] Embodiment 20 is any of the methods from Embodiments 12 to 19, wherein the step of purifying trifluoroiodomethane (CF3I) includes exposing trifluoroiodomethane (CF3I) to a desiccant.

[0068] As used herein, the phrase “any range defined between any two of the aforementioned values” means that any range can be selected from any two of the values ​​listed before such phrase, regardless of whether those values ​​are in the lower or higher part of the enumeration. For example, a pair of values ​​may be selected from two lower values, two higher values, or a lower value and a higher value.

[0069] Where used herein, the singular forms "a," "an," and "the" include the plural form unless the context explicitly indicates otherwise. Furthermore, when a quantity, concentration, or other value or parameter is given as a range, a preferred range, or an enumeration of upper preferred values ​​and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pair of any upper or lower preferred values ​​and any lower or lower preferred values, regardless of whether the ranges are disclosed separately. Where numerical ranges are enumerated herein, unless otherwise specified, the range is intended to include its endpoints, as well as all integers and fractions within the range. The scope of this disclosure is not intended to be limited to the specific values ​​enumerated when defining the range.

[0070] As used herein, the phrase “any range defined between any two of the aforementioned values” means that any range is any of the values ​​listed before such phrase, regardless of whether those values ​​are in the lower or higher part of the enumeration. This means that there can be two options to choose from. For example, a pair of values ​​may be chosen from two lower values, two higher values, or one lower value and one higher value.

[0071] It should be understood that the foregoing description is merely illustrative of the present disclosure. Various alternative and modified forms can be devised by those skilled in the art without departing from the present disclosure. Accordingly, the present disclosure is intended to encompass all such alternative forms, modifications, and variations that fall within the scope of the appended claims.

Claims

1. Effective amount of trifluoroiodomethane (CF ３ I) A composition comprising a heterogeneous azeotropic or azeotropic-like composition essentially consisting of water.

2. The composition according to claim 1, wherein the azeotropic or azeotropic-like composition has a boiling point of about 18.0°C to 19.0°C at a pressure of about 58.0 psia to about 60.0 psia.

3. The azeotropic or azeotropic composition contains approximately 47.7% to approximately 99.0% by weight of trifluoroiodomethane (CF ３ I) The composition according to claim 1, comprising essentially 1.0% by weight to about 52.3% by weight of water.

4. The azeotropic or azeotropic-like composition contains approximately 60.4% to approximately 95.0% by weight of trifluoroiodomethane (CF ３ I) The composition according to claim 1, comprising essentially 5.0% to about 39.6% by weight of water.

5. The azeotropic or azeotropic-like composition contains approximately 70.2% to approximately 90.0% by weight of trifluoroiodomethane (CF ３ I) The composition according to claim 1, comprising essentially about 10.0% to about 29.8% by weight of water.

6. A method for forming a heterogeneous azeotrope or azeotrope-like composition, comprising trifluoroiodomethane (CF ３ I) Combine with water to make an effective amount of trifluoroiodomethane (CF) having a boiling point of approximately 18.0°C to approximately 19.0°C at a pressure of approximately 58.0 psi to approximately 60.0 psi. ３ I) A method comprising the step of forming an azeotropic or azeotropic-like composition essentially consisting of water.

7. The aforementioned combining step involves adding approximately 47.7% to approximately 99.0% by weight of trifluoroiodomethane (CF ３ I) The method according to claim 6, comprising combining with about 1.0% to about 52.3% by weight of water.

8. The aforementioned combining step involves adding approximately 60.4% to approximately 95.0% by weight of trifluoroiodomethane (CF ３ I) The method according to claim 6, comprising combining with about 5.0% to about 39.6% by weight of water.

9. The step of combining comprises combining about 70.2% to about 90.0% by weight of trifluoroiodomethane (CF ３ I) and about 10.0% to about 29.8% by weight of water, the method according to claim 6.

10. Trifluoroiodomethane (CF ３ I) A method for separating an impurity from a composition containing water and at least one impurity, Trifluoroiodomethane (CF ３ I) Change the relative amounts of and water to make the composition an effective amount of trifluoroiodomethane (CF ３ I) A step of subjecting the material to conditions effective for forming a heterogeneous azeotropic or azeotropic-like composition consisting essentially of or comprising the same as water, A method comprising the step of separating the azeotropic or azeotropic composition from the impurities.

11. Trifluoroiodomethane (CF ３ I) The step of changing the relative amounts of and water is to purpose trifluoroiodomethane (CF ３ The method according to claim 10, comprising adding (I) to the composition.

12. The aforementioned trifluoroiodomethane (CF ３ I) The method according to claim 10, wherein the step of changing the relative amounts of water and water includes adding water to the composition.

13. After the separation step, the trifluoroiodomethane (CF ３ The method according to claim 10, further comprising the additional step of purifying (I).

14. The aforementioned trifluoroiodomethane (CF ３ I) The step of purifying the trifluoroiodomethane (CF ３ The method according to claim 13, comprising removing water from (i).

15. The aforementioned trifluoroiodomethane (CF ３ I) The step of purifying the trifluoroiodomethane (CF ３ The method according to claim 13, comprising exposing (i) to a desiccant.

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