Gold-based catalysts for acetylene hydrochlorination
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United States of America Patent
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Issued Date -
Jul 31, 2014
app pub date -
Jan 30, 2013
filing date -
Jan 30, 2013
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Abstract
Powder catalysts that comprise particles of chemical compounds of Au and Cu deposited on acid-washed carbon-based supports are effective catalysts in ethyne hydrochlorination to produce vinyl chloride monomers (VCMs). They give a high selectivity and productivity of VCM and decreased amounts of the byproducts of chloroethane, dichloroethane and others. Thiocyanates are used as complexing agents to extend the catalyst lifetime. The activity of the catalyst is enhanced by doping nitrogen atoms into the support.
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