公开(公告)号：US09765024B2

公开(公告)日：2017-09-19

申请号：US15327504

申请日：2015-07-22

Applicant: ORGANO CORPORATION

Inventor： Ryosuke Terashi

IPC: B01D3/10 ,  B01D61/58 ,  C02F1/20 ,  C07D207/267 ,  B01D61/36 ,  B01D15/36 ,  B01D19/00 ,  C02F1/44 ,  C02F1/42 ,  C02F103/34

CPC classification number: C07D207/267 ,  B01D3/10 ,  B01D15/363 ,  B01D19/0031 ,  B01D61/36 ,  B01D61/362 ,  B01D61/58 ,  B01D2311/02 ,  B01D2311/06 ,  B01J47/02 ,  C02F1/20 ,  C02F1/44 ,  C02F1/448 ,  C02F2001/422 ,  C02F2103/34 ,  Y02P20/57

Abstract: An organic solvent purification system that separates an organic solvent having a boiling point of more than 100° C. at 1 atm, such as N-methyl-2-pyrrolidone (NMP), from a liquid mixture containing the organic solvent and water and purifies the organic solvent includes: a heater that heats the liquid mixture; a pervaporation apparatus that includes a pervaporation membrane, and is provided at subsequent position of the heater, the pervaporation apparatus separating the organic solvent from the water; a vacuum evaporator to which the organic solvent collected from a concentration side of the pervaporation apparatus is supplied; and piping that supplies the heater with the organic solvent vaporized in the vacuum evaporator as a heat source of the heater. The heater heats the liquid mixture using concentration heat of the organic solvent vaporized by the vacuum evaporator.