Method of Removing Impurities from Natural Ester, Oil-Based Dielectric Fluids
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United States of America Patent
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Nov 8, 2011
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Dec 30, 2010
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Abstract
The method of manufacturing a natural ester, oil-based electrical insulation fluid by contacting refined, bleached, optionally winterized, and deodorized natural ester oil, e.g., soy oil, with an absorbent is improved by using as the absorbent a synthetic silicate absorbent comprising an alkali and/or alkaline earth metal, e.g., magnesium.
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