Process for the separation of mixtures by means of mass transfer at different temperatures or pressures
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United States of America Patent
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Apr 10, 1984
Grant Date -
N/A
app pub date -
Dec 11, 1981
filing date -
Dec 11, 1981
priority date (Note) -
Expired
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Abstract
The invention relates to a process for the separation of material mixtures by means of mass transfer of different phases, which at least partly circulate in countercurrent in a closed circuit in which part of the mass transfer devices are operated at a higher temperature or pressure and another part thereof are operated at a lower temperature or pressure. The separating effects are achieved in that at least one third of one of the components of the mixtures also changes phase state with respect to the particular temperature or pressure change. The process is particularly suitable for the separation of methane and argon from the synthesis circuit of an ammonia plant. The otherwise conventional hydrogen and ammonia are largely avoided. The process requires neither compressors nor high pressure pumps nor low-temperature devices.
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