METHOD FOR STORAGE OF TRIETHANOLAMINE FOR PREVENTING DISCOLORING

Although various methods of solving a discoloration problem of triethanolamine during the storage of triethanolamine are suggested, a method of prescribing a coloration preventing agent during the process or after the process among the methods is a method which is preferred since the method is safe,...

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Bibliographische Detailangaben
Hauptverfasser: HWANG, SO RA, YOO, JONG CHEOL, SEO, YOUNG JONG
Format: Patent
Sprache:eng ; kor
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Zusammenfassung:Although various methods of solving a discoloration problem of triethanolamine during the storage of triethanolamine are suggested, a method of prescribing a coloration preventing agent during the process or after the process among the methods is a method which is preferred since the method is safe, and additional costs of the method are low. In the existing technology, a prescription during the process has included materials such as hypophosphoric acid and hypophosphorous acid, and a prescription after the process has included materials such as metal-containing activated carbon, hydrazine, and the like. A storage method for preventing coloration of triethanolamine of the present invention, as a storage method of triethanolamine finally prepared by completing a preparation process, comprises adding one or more coloration preventing agents selected from the group consisting of hypophosphoric acid, hypophosphorous acid, hydroxylamine and sodium borohydride to the prepared triethanolamine to prevent coloration of the prepared triethanolamine. 트리에탄올아민의 저장 중 변색문제 해결 방법이 다양하게 제시되고 있지만, 그 중 착색방지제를 처방(공정 중 또는 후처방)하는 것이 안전하며, 추가 비용이 크지 않아 선호되는 방법이다. 종래기술로서 공정 중 처방제로는 주로 아인산, 차인산이, 후처방제로는 금속을 포함하는 활성탄, 히드라진 등의 물질들이 사용되었다. 본 발명은 제조공정이 완료되어 최종 생산된 트리에탄올아민의 보관 방법으로서, 상기 생산된 트리에탄올아민에 아인산, 차인산, 하이드록실아민 및 수소화붕소나트륨으로 이루어진 군에서 선택되는 1종 이상의 착색방지제를 첨가하여 상기 생산된 트리에탄올아민의 착색을 방지하기 위한 보관 방법을 제공한다.