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Preparation of zeolite A with excellent optical properties from clay
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0002-2796-4665
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0002-8637-0461
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0003-4292-6752
Chemistry Research Institute IIQ, San Andres Mayor University UMSA, La Paz.
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2015 (English)In: Journal of Alloys and Compounds, ISSN 0925-8388, E-ISSN 1873-4669, Vol. 619, p. 771-777Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2015. Vol. 619, p. 771-777
National Category
Chemical Process Engineering
Research subject
Chemical Technology
Identifiers
URN: urn:nbn:se:ltu:diva-14123DOI: 10.1016/j.jallcom.2014.09.080ISI: 000344429000112Scopus ID: 2-s2.0-84907487163Local ID: d7495a63-846c-4bfd-9cd0-d46a85f3c1c8OAI: oai:DiVA.org:ltu-14123DiVA, id: diva2:987077
Note
Validerad; 2014; Nivå 2; 20140918 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2024-03-27Bibliographically approved

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Garcia, GustavoAguilar, WilsonCarabante, IvanHedlund, JonasMouzon, Johanne

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