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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 18, Number 5
JKCSEZ 18(5)
October 20, 1974 

Anodic Oxidation of Potassium Iodide Solution (Ⅱ)

요오드화칼륨 수용액의 양극산화 (제2보)
Chong Woo Nam, Hark Joon Kim

남종우, 김학준
저자들에 의해서 이미 보고되어 있는 요오드화염으로부터 요오드산염(I-→IO3-) 및 요오드산염으로 부터 과요오드산염(IO3-→IO4-)까지의 전해결과를 참작하여 무격막 전해조와 이산화납양극을 사용하여 요오드화염으로부터 과요오드산염(I-→IO4-)을 직접 전해제조하기 위한 최적 전해조건에 관하여 검토하였다. 0.5g/l의 환원방지제인 중크롬산칼륨을 함유함 1몰의 요오드화칼륨 수용액을 15A/dm2의 양극전류밀도와 60℃의 전해온도에서 전해한 결과, 요오드화칼륨으로 부터 과요오드산칼륨까지의 변화율 98%에서 전류효율이 84%이었다. 또한 각종 전해액중에서 이산화납 양극에 의한 분극곡선으로 부터 전극반응의 내용도 설명하였다.

Direct electrochemical preparation of periodate from iodide (I- → IO4-) was investigated using a none-diaphragm cell and lead dioxide anode. The direct electrolytic conditions were combinations of the respectively results on the processes of iodate from iodide(I- → IO3-), and periodate from iodate(IO3- → IO4-) which were reported by the author, previously. The optimum condition was achieved when 1.0 M potassium iodide solution containing 0.5 g/l potassium dichromate as an anti-reducing agent was electrolyzed at anodic current density of 15 Å/dm2 and electrolytic temperature of 60℃. Under such a condition, the current efficiency was found to be 84 % at 98 % conversion of iodide to periodate. The explanation of electrode reaction was also given a consideration based on the polarization curves at lead dioxide anode in various electrolyte solutions.

373 - 380
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