Method for concentrating aqueous solution of ethanol
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CONSTITUTION: Gaseous carbon dioxide under a high pressure in a supercritical state or pseudocritical state is dissolved in an aqueous solution of ethanol in an extraction tank 1 to develop three phases of vapor phase, light liquid phase and heavy liquid phase in the above-mentioned extraction tank 1, and the respective phases are then taken out of the extraction tank 1 and separated into flash tanks 4', 4" and 4'''. The phases are then separated into the gaseous carbon dioxide and aqueous solution of ethanol, and the aimed aqueous solution of ethanol in a high concentration is obtained advantageously from the system of an aqueous solution of ethanol in a low concentration obtained by the fermentation method, etc. This method has the following advantages; The extracting agent is easily handled and separated from the aimed substance without requiring a large quantity of heat of good quality as in the distillation method, and the pressure is adjusted more easily and the concentration degree is higher than in the conventional liquid-liquid extraction method.
COPYRIGHT: (C)1984,JPO&Japio，下面是Method for concentrating aqueous solution of ethanol专利的具体信息内容。
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6 电池单元
