Preparation of zeolite A with excellent optical properties from clay

Gustavo García, Wilson Aguilar-Mamani, Ivan Carabante, Saúl Cabrera, Jonas Hedlund, Johanne Mouzon

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

19 Citas (Scopus)

Resumen

Discoloration of zeolite A powder is a common problem when natural raw materials such as kaolin clay are used because of the formation of colored iron compounds. In this study, we report on a novel method to produce zeolite A with excellent optical properties, from clays. The brightness is as high as 94.5 and the yellowness is as low as 3.0. The product is comprised of intergrown zeolite A crystals with cubic habit and a length ranging between 0.5 and 2 μm. Good optical properties are obtained when the raw material contains magnesium, as some natural raw materials do, or alternatively, when a magnesium compound is added to the raw material. Magnesium probably forces iron inside colorless extraneous magnesium aluminosilicate compounds. This simple process appears very promising for the preparation of zeolite A with good optical properties from inexpensive natural raw materials.

Idioma originalInglés
Páginas (desde-hasta)771-777
Número de páginas7
PublicaciónJournal of Alloys and Compounds
Volumen619
DOI
EstadoPublicada - 15 ene. 2015

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