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filingDate 2007-11-29-04:00^^<http://www.w3.org/2001/XMLSchema#date>
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publicationDate 2011-11-08-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber US-8053386-B2
titleOfInvention Heteropoly acid catalyst and method of preparing the same
abstract The present invention relates to a heteropoly acid catalyst which is used for the production of methacrylic acid by gas phase oxidation of methacrolein and a preparing method thereof. The present invention, thereby, provides a novel heteropoly acid catalyst having excellent methacrolein conversion rate, methacrylic acid selectivity and yield.
priorityDate 2006-12-01-04:00^^<http://www.w3.org/2001/XMLSchema#date>
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