Three stage processes for the separation of supercritical or near-critical mixtures
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United States of America Patent
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Aug 1, 2006
Grant Date -
Jul 14, 2005
app pub date -
Apr 2, 2003
filing date -
Apr 11, 2002
priority date (Note) -
Expired
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Abstract
Processes for separating supercritical or near-critical mixtures containing hydrogen, a solvent gas, methanol and a fatty alcohol under an initial pressure of from 100 to 300 bar are described, wherein the processes comprise: (a) reducing the pressure of such a mixture in a first stage to a pressure of from 50 to 150 bar to form a first recycle gas and a first partially-separated intermediate mixture, wherein the reduced pressure in the first stage is at least below the initial pressure; (b) reducing the pressure of the first partially-separated intermediate mixture in a second stage to a pressure of from 10 to 50 bar to form a second recycle gas and a second partially-separated intermediate mixture; and (c) reducing the pressure of the second partially-separated intermediate mixture in a third stage to a pressure of from 1 to 10 bar to form a third recycle gas and a fatty alcohol product.
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