Process for selective removal of volatile substances from liquids, as well as unit and device for carrying out the process
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United States of America Patent
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Jan 29, 1991
Grant Date -
N/A
app pub date -
Apr 26, 1989
filing date -
Aug 28, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
For selective removal of volatile substances from liquids, the initial liquid is fed to a crosscurrent diaphragm separation device (2), in which the permeate consisting of water and volatile substances is separated by increased transdiaphragm pressure and concentration difference. Then, the permeate is fed into a further liquid-volatile separation device (8), in which the alcohol is distilled out. The permeate now only consisting of water, salts, acids and extracts is then fed back into the crosscurrent diaphragm separation device (2), where it flows through the permeate side in countercurrent to the flow of the retenate. Excess permeate can be introduced into the dealcoholized initial liquid. By the process according to the invention the economic efficiency of the unit and the quality of the end product are significantly improved.
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