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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 19, Number 2
JKCSEZ 19(2)
April 20, 1975 

 
Title
A Study on the Formation of Hydrous Ferric Oxide from Ferrous Sulfate

황산제일철로부터 함수산화철생성에 관한 연구
Author
Joo Kyung Sung, Soo Duk Suhl, Yong Kil Whang

성주경, 설수덕, 황용길
Keywords
Abstract
황산제일철을 원료로 해서 함수산화철 안료를 제조하기 위한 실험이다. 황산제일철을 암모니아로 중화해서 Mohr's salt(ferrous ammonium sulfate)을 만들고 Mohr's salt의 농도를 Fe(II) 이온농도, 14∼72g/l, 수소이온농도를 pH3 또는 6으로 조절한뒤, 반응온도는 90∼100℃로 일정하게 유지하고 반응시간 2시간, 3기압으로 공기 가압한 결과는 다음과 같다. Mohr's salt의 농도가 진하고, 중성으로 갈수록 함수산화철의 수득율이 증가되며, Mohr's salt 농도가 Fe(II) 이온농도, 42.81g/l 일때, 91.5% 이상의 수득율을 얻었다. 이렇게하여 생성된 함수산화철의 결정형은 α-goethite형이며, 색상도 천연 α-goethite와 유사하였다. 이것을 500℃로 하소(calcination)하니 미려한 적갈색을 띤 α-Fe2O3가 생성되었다.

The formation of iron oxide hydroxide in a ferrous sulfate was studied in different contents of iron in the solution at a temperature range of 90 to 100℃ under 1∼3 atmospheres. The Mohr's salt thus formed was hydrolyzed under 1 to 3 atmospheres, in 14 to 72 g/l of iron content in the solution pH 3 or 6 for two hours at 90 to 100℃. The results obtained was as follows; 1) In Mohr's salt solution, as the iron content was increased, with decreasing the concentration of hydrogen ion, the yield of iron oxide hydroxide was gradually increased. 2) When iron content in Mohr's salt solution was 42.81 g/l, 91.5 % of iron was recovered in the form of α-goethite similar to yellow grade of natural goethite. 3) When α-goethite obtained was calcined of 500℃, it was turned into α-ferric oxide with a redish brown colour.

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