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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 19, Number 5
JKCSEZ 19(5)
October 20, 1975 

 
Title
The Heterogeneous Reaction of Calcinated Alunite Powder with Ammonium Buffer Solution

하소 Alunite 분말과 암모늄염 완충용액과의 불균일반응
Author
Hee Chul Lee, Chul Young Kim, Ikchoon Lee

이희철, 김철영, 이익춘
Keywords
Abstract
Alunite 광으로 부터 칼륨과 알루미늄 성분을 완전히 분리하여 내는 방법으로 pH8.0인 완충용액과의 반응에서 반응속도와 반응기구를 구명했다.

Calcinated alunite powder (surface area 5100 cm2/g) was found to react with well stirred ammonium buffer solution (pH 8.0) following Jander's equation. The rate constants increase with the amount of solid and temperature of reaction system. The energy of activation for the reactions (at 30~60 ℃) was 15.7 kcal/mole. The rate-determining step appears to involve ionization of alunite.

Page
381 - 385
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