Process and apparatus for recovering a lower alcohol from a mixt

Details Process and apparatus for recovering a lower alcohol from a mixt Process and apparatus for recovering a lower alcohol from a mixt

1991-10-18

1992-08-11

Evans, J. E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

34 22, 34 36, 34243R, C07C 2976, C07C 3110, F26B 300, F26B 1900

Patent

active

051381052

ABSTRACT:
A lower alcohol is recovered from a mixed liquid thereof with water, derived from a vapor drying procedure for a water-wetted article, for example, a water-washed lens or semiconductor wafer, by feeding the mixed liquid of a lower alcohol with water from the vapor drying procedure to a vaporizer; vaporizing the mixed liquid; feeding the mixed vapor into a gas-separating module comprising at least one gas-separating membrane, for example, composed of a aromatic polyimide hollow fiber, which allows a selective permeation of water vapor from a feed side to a permeated side therethrough, withdrawing a non-permeated vapor fraction containing the lower alcohol in an increased concentration from the feed side, and converting the vapor fraction to a high purity lower alcohol liquid by cooling, while discharging a permeated vapor fraction containing water in an increased concentration from the permeated side.

REFERENCES:
patent: 4895989 (1990-01-01), Sander et al.

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