OLED PURIFICATION METHOD OF IONIC LIQUID USED IN OLED PURIFICATION FOR REUSE

The present invention relates to a purification method for reuse of an ionic liquid for purification of an organic light emitting material (OLED). The purification method includes the steps of: preparing a mixed solution of an ionic liquid and isopropyl alcohol used for purification of organic mater...

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Main Authors YUK, DUCK SOO, PARK YEONG IHN, RYU, JUNG BOK, PARK, JAE HYUNG
Format Patent
LanguageEnglish
Korean
Published 27.09.2021
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Summary:The present invention relates to a purification method for reuse of an ionic liquid for purification of an organic light emitting material (OLED). The purification method includes the steps of: preparing a mixed solution of an ionic liquid and isopropyl alcohol used for purification of organic material (S100); passing the mixed solution through an ion exchange resin (S200); and removing isopropyl alcohol and moisture contained in the mixed solution that has passed through the ion exchange resin by azeotropic distillation (S300). Therefore, the present invention can recover the ionic liquid used in the purification of an OLED and the like and purify the ionic liquid with high purity and high yield so that the ionic liquid may be reused through a fast and simple process at low cost. In addition, according to the present invention, the purification method can obtain an ionic liquid of high purity at low cost by using an ion exchange resin by recovering an expensive ionic liquid used for refining organic materials. The ionic liquid may be reused since there is no denaturation of the ionic liquid so that it is possible to purify the ionic liquid in an environmentally friendly manner. 본 발명은 유기소재 정제에 사용된 이온성액체와 이소프로필알코올이 혼합된 혼합용액을 준비하는 단계(S100); 상기 혼합용액을 이온교환수지에 통과시키는 단계(S200); 및 이온교환수지를 통과한 혼합용액에 포함된 이소프로필알코올과 수분을 공비증류법으로 제거하는 단계(S300);를 포함하는 유기발광소재(OLED) 정제용 이온성액체의 재사용을 위한 정제방법에 관한 것이며, 이는 유기발광소재(OLED) 등의 정제에 사용된 이온성액체를 회수하여 지비용의 신속하고 간단한 공정을 통하여 이를 재사용 가능하도록 고순도 및 고수율로 정제가 가능한 장점을 갖는다. 또한, 본 발명에 의하면, 유기 소재 정제에 사용된 고가의 이온성 액체를 회수하여 이온교환수지를 이용하여 저비용으로 고순도의 이온성 액체를 얻을 수 있으며, 이온성 액체의 변성이 없어 이를 재사용할 수 있는 바, 친환경적으로 이온성 액체의 정제가 가능한 장점을 갖는다.
Bibliography:Application Number: KR20200061745