Patent ID: 8455675
Filing Date: 2013-06-04
Classification: B01D,B08B

Abstract:
1. A method of recovering a solution component in an impregnation process/impregnation component recovery system including an impregnation step, a cleaning step and a solidification step, the method of recovering by separating a plurality of components contained in a solution for recovery, the method comprising the steps of: impregnating voids in a molded workpiece with a first component, the first component being a water-soluble monomer; cleaning the workpiece with a cleaning solution comprising a second component, the second component being a solvent into which the first component is capable of being dissolved; solidifying the first component impregnated in the voids by heating the workpiece to a solidification temperature, the solidification temperature being a temperature at which the first component solidifies; separating from the cleaning solution, between the first component and the second component, by reducing the pressure on the cleaning solution, setting the boiling point of the second component to a temperature that is less than the solidification temperature of the first component, and evaporating the second component without solidifying the first component; and recovering the second component evaporated in the separation step by cooling; wherein the separation step is terminated when it is determined that separation between the first component and the second component has been terminated when a temperature of the solution from which the second component is evaporated reaches a determination temperature that is determined in accordance with the permissible content of water contained in the first component.