Paper Title:

Optimization of Conditions for Extraction of Acid-Soluble Al2O3 from Pyrophyllite

Periodical Advanced Materials Research (Volume 366)
Main Theme Advanced Research on Material Engineering, Architectural Engineering and Informatization
Edited by Helen Zhang and David Jin
Pages 330-333
DOI 10.4028/www.scientific.net/AMR.366.330
Citation Jun Jun Wu et al., 2011, Advanced Materials Research, 366, 330
Online since October, 2011
Authors Jun Jun Wu, Hai Feng Chen, Shi Jiang Zhao, Bin Li
Keywords Acid-Soluble, Al2O3, Fitting, Pyrophyllite
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Abstract

Pyrophyllite was the cheap, environmentally friendly alumina silicate clay minerals. This paper studied optimization of conditions for extraction of acid-soluble Al2O3 from pyrophyllite. Qualitative tests had been performed in studying pyrophyllite crystal at different temperatures by using scanning electron microscopy. Dissolution experiments showed that after thermal activation the behavior of alumina in acid the dissolution was different, which was affected by hydrochloric acid concentration, heat activation temperature and acid leaching time. When the calcinations temperature was 700 °C and hydrochloric acid concentration was 25%, the dissolution amount of alumina largest. The fit results indicated that the research for the relationship between dissolution and time by Using Exponential function series Asymptotic1 model to fitting match was the best. So the above function could be used to estimate each time the dissolution of alumina from pyrophyllite in hydrochloric acid.