Organo Corporation

Kyosuke Yamada

Takayuki Masuda

Naoko Suzuki

Shinichi Ohashi

Chika Kemmochi

Ryosuke Terashi

A purification method for separating and purifying an organic solvent from a liquid mixture of an organic solvent and water, the organic solvent having a boiling point of more than 100° C. at 1 atm, includes the steps of: passing the liquid mixture through a first ion exchange device; supplying the liquid mixture discharged from the first ion exchange device to a pervaporation device to selectively separate water component; supplying the organic solvent recovered from the concentration side of the pervaporation device to an evaporator to obtain a purified organic solvent; and passing, through the second ion exchange device, a portion of liquid containing the organic solvent and flowing at a first position subsequent to the first ion exchange device. The liquid discharged from the second ion exchange device is returned to a second position which is at a preceding stage of the pervaporation device.

Organic solvent purification method and purification system

The present invention provides an electric device for producing deionized water comprising: desalting chamber () defined by at least two ion-exchange membranes () and filled with an ion exchanger; first concentration chamber () positioned adjacent to one side of the desalting chamber with one of the ion-exchange membranes therebetween; second concentration chamber () positioned adjacent to the other side of the desalting chamber with another of the ion-exchange membranes therebetween; and a pair of electrode chambers () with one electrode chamber being disposed at the outer side of first concentration chamber () and the other electrode chamber being disposed at the outer side of second concentration chamber (), wherein the electric device for producing deionized water is provided with: main body part () formed to include desalting chamber (), concentration chambers (), and electrode chambers (); a pair of fixing plates () disposed in such a way that main body part () is positioned therebetween; and elastic body (). Elastic body () is disposed in such a way that the fixing plates () and the elastic part () apply compressive stress to main body part () in arrangement direction of desalting chamber (), concentration chambers (), and electrode chambers ().

Electric device for producing deionized water

A chromatographic separator characterized in that two pumps are employed for controlling chromatographic separation that combines a first process for supplying at least one of feed solution and eluent into a circulation system and extracting the same quantity as that of liquid supplied into the circulation system from one position of a packed column where some component is enriched in the circulation system, and a second process for circulating liquid in the system without supplying the feed solution and eluent and extracting the separated component at all. Easy-to-control chromatographic separator, in which a total number of pumps to be used is decreased and high separation performance is attained through a simple structure, can thereby be provided.

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Tokyo, Japan

Kyosuke Yamada