Tungstic acid powder consisting of spherical tungsten particles and method for producing same
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United States of America Patent
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Jun 4, 2013
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Sep 23, 2011
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May 11, 2004
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Abstract
Process for the production of a powdered spherical tungstic acid by acidification of an aqueous alkaline tungstate solution with mineral acid at elevated temperature, preferably in a continuous stirred tank or a cascade of at least 2 continuous stirred tanks, and tungstic acid obtainable in this way, which is characterized by a high bulk density and spherical morphology.
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