PROCESS FOR THE PRODUCTION OF MIXED-METAL-OXIDE INORGANIC PIGMENTS FROM INDUSTRIAL WASTES
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United States of America Patent
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Issued Date -
Dec 16, 2010
app pub date -
Dec 27, 2007
filing date -
Dec 27, 2006
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Abandoned
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Abstract
The invention relates to the production of mixed-metal-oxide inorganic pigments, using industrial waste as raw materials, comprising the following steps: (i) characterization and selection of wastes; (ii) their treatment, if required; (iii) formulation+dosing+mixing of components; (iv) drying+calcination; and (v) washing+milling. Selected wastes might be used in the as-received condition or after drying or calcination. The present invention deals with materials that are produced by colorants or pigments producers mainly for use in the ceramic sector, since formulations are stable at high temperatures and act as colorants of glazes or ceramic bodies. The use of high temperatures might also assure the desirable inertization of possible hazardous species.
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