Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2009-03-31
2011-11-08
Price, Elvis O (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C568S913000
Reexamination Certificate
active
08053610
ABSTRACT:
The present invention relates to a method for purifying an aqueous solution of fermentation alcohol to give anhydrous alcohol, wherein a mash column is controlled such a manner that an alcohol concentration of an alcohol/water mixed vapor distilled from a mash column is less than 50% by weight and a reflux amount of a condensate to a distillation column is controlled such a manner that an alcohol concentration of an alcohol/water mixed vapor that is distilled from the distillation column is 55 to 85% by weight. According to the present method, the purification for obtaining an anhydrous alcohol from an aqueous solution of a fermentation alcohol with the use of a mash column, a pressurized distillation column and a membrane separator can be more conveniently carried out with an extremely high energy efficiency as the whole process.
REFERENCES:
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International Search Report issued in corresponding PCT Application No. PCT/JP2009/056726, mailed May 19, 2009.
Kikuchi Masao
Nakanishi Shunsuke
Knobber Martens Olson & Bear LLP
Price Elvis O
Ube Industries Ltd.
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