Review and Effect of Acid Treatment on Indian Montmorillonite and Kaolin Clay

Vaibhav Gurao; Vatsal Pandya; Sandeep Rai

Abstract

Clay being the available resource throughout the world and being rich in alumino-silicate compounds is of great importance. This review mainly focuses on the montmorillonite and kaolin clay and includes acid treatment, clay based catalyst and zeolite from montmorillonite and kaolin clay. In this review, effect of acid treatment, Si/Al ratio and conversion of catalyst in reaction is discussed. Indian clay is treated with sulphuric acid and hydrochloric acid, respectively followed by calcination. The physio-chemical characteristics of acid leached montmorillonite and kaolin clay were studied by wet process, XRF, and FTIR techniques; studies indicate that acid treatment leads to the removal of the octahedral Al3+ cations along with other impurities. Leaching of Al3+ ions increased progressively with severity of the acid treatment. Solids thus obtained by acid treatments can be used as promising adsorbents and catalyst supports.

Abstract

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