Amidation of vinyl chloride with dimethylamine using a supported palladium catalyst
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United States of America Patent
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May 17, 1994
Issued Date -
N/A
app pub date -
Sep 23, 1992
filing date -
Dec 19, 1984
priority date (Note) -
Expired
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Abstract
A continuous process for making N,N-dimethylacrylamide (NNDMA) is disclosed which uses a commodity chemical, namely vinyl chloride (VCl), which is amidated with dimethylamine (DMA) and carbon monoxide in the presence of a supported palladium(O) triorganophosphine catalyst used under conditions where the ratio of P/Pd is critical. The continous process unexpectedly provides the catalyst with long life because the reaction can be carried out in a moving bed of catalyst in the presence of enough acetonitrile solvent to prevent deposition of DMA.HCl, formed during the reaction, in the pores of the catalyst support.
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