METHOD FOR PRODUCING CHROMIUM (III) OXIDE
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United States of America Patent
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Issued Date -
May 2, 2013
app pub date -
Dec 8, 2010
filing date -
Dec 22, 2009
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Abandoned
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Abstract
Process for preparing chromium(III) oxide, comprising the steps of:
- a) Decomposing an alkali metal ammonium chromate double salt at a temperature of 200 to 650° C., especially of 250 to 550° C.,b) washing the decomposition product obtained after a) andc) calcining the product obtained after b) at a temperature of 700 to 1400° C., especially of 800 to 1300° C.
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