METHOD FOR PREPARING ION EXCHANGE RESIN WITH REDUCED METAL IMPURITY CONTENT

• Main Authors: SHIN DAE CHEOL, CHOI SEUNG MIN, LEE SEUNG YOON, PARK SUK IL, JUNG YOUN SEO, KIM MIN JUNE
• Format: Patent
• Language: English; Korean
• Published: 11.05.2021
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The present invention relates to a method for preparing an ion exchange resin with a reduced metal impurity content, and more particularly, to a method for preparing an ion exchange resin of which the content of metal ions is extremely low and total organic carbon (TOC) elution is low, and has excellent resistivity to be used in the manufacture of ultrapure water for semiconductors. The method comprises the following steps of: (1) making an ion exchange resin contact with a mineral acid solution at 30°C or higher; and (2) washing the ion exchange resin obtained in the step (1) with ultrapure water. 본 발명은 금속 불순물 함량이 감소된 이온 교환수지의 제조방법에 관한 것으로, 더욱 상세하게는, 금속 이온의 함유량이 극히 적고 총 유기탄소(TOC) 용출이 낮으며, 비저항 값이 우수하여 반도체용 초순수의 제조에 사용되는 이온 교환수지를 제조하는 방법에 관한 것이다.