Compositions of tetrafluoropropene and hydrocarbons
A technology of tetrafluoropropene and composition, applied in the field of composition of tetrafluoropropene and hydrocarbon, can solve problems such as azeotrope formation is not easy to predict, identification of new mixture is complicated and so on
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Embodiment 1
[0154] A boiling point meter was used, which consisted of a vacuum jacket with a condenser on top of the jacket, which was further equipped with a quartz thermometer. About 9 grams of propane (normal boiling point -42.1C) was charged to the ebulliometer and the boiling point temperature was measured. Incremental amounts of HFO-1234ze (99% trans, normal boiling point -19C) were added in small measured increments, and after each addition, the boiling point temperature was likewise measured. The results are reported in Table 1. In the absence of azeotropic properties, each addition of higher boiling HFO-1234ze will result in an increase in the boiling temperature of the mixture. However, when HFO-1234 was added to propane, a decrease in temperature was observed, indicating the formation of a binary minimum boiling azeotrope in the amount of greater than about 0 to about 25 wt% HFO-1234ze. In the range of greater than about 0 to about 75 wt% HFO-1234ze, the boiling point of the ...
Embodiment 2
[0159] The procedure of Example 1 was repeated except that approximately 27 grams of HFO-1234ze (99% trans, Nbp -19C) was charged to the ebuilometer and n-butane (Nbp -12C) was added in small measured increments , and after each addition, the boiling point temperature was also measured. The results are reported in Table 2. In the absence of azeotropic properties, each addition of higher boiling n-butane will result in an increase in the boiling temperature of the mixture. However, when butane was added to HFO-1234, a decrease in temperature was observed, indicating the formation of a binary minimum boiling point azeotrope in the amount of greater than about 0 to about 10 wt% n-butane. Additionally, the data indicates that the second minimum boiling azeotrope is formed in amounts greater than about 35 to about 50 wt% n-butane. In the range of greater than about 0 to about 50 wt% n-butane, the boiling point of the composition varies by about 2.5°C or less, indicating azeotrope...
Embodiment 3
[0165] The procedure of Example 1 was repeated except that approximately 27 grams of isobutane (Nb 12C) was charged to the ebulometer and HFO-1234ze (99% trans, Nb -19C) was added in small measured increments, And after each addition, the boiling point temperature was also measured. The results are reported in Table 3. In the absence of azeotropic properties, each addition of higher boiling isobutane will result in an increase in the boiling temperature of the mixture. However, when butane was added to HFO-1234, a decrease in temperature was observed, indicating the formation of a binary minimum boiling point azeotrope in the amount of greater than about 0 to about 50 wt% isobutane. In the range of greater than about 0 to about 50 wt% n-butane, the boiling point of the composition varies by about 6°C or less, indicating azeotrope and / or azeotrope-like behavior at the indicated pressures in this range .
[0166] table 3
[0167] HFO-1234 / isobutane at 14.37psia
[0168] ...
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