특허 분석을 활용한 전기탈이온(EDI) 기술 개발 동향

Recently electrodeionization (EDI) has received attention in electronics, pharmaceutical, and power industries for ultrapure water production in lieu of ion exchange rein process. In this study, the EDI technology trend was investigated using patent analysis based on patent application year, countries, main applicants, and patent map. Most of the main applicants were from USA and Japan indicating the necessity for the EDI technology development in Korea. Kurita Water Industries Ltd and Evoqua Water Technologies (formerly Siemens Water Technologies) were recognized as key applicants with their unique EDI technology. Synthesis technology including ion exchange membranes and ion exchange resins, EDI module design for low scaling and high boron removal efficiency, and process design were main topics in EDI technology development. This study provides EDI technology trend and current status of the technology.