Process for the preparation of propylene glycol
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United States of America Patent
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Nov 17, 2009
Grant Date -
Oct 2, 2008
app pub date -
Mar 28, 2008
filing date -
Mar 29, 2007
priority date (Note) -
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Abstract
A process for the preparation of propylene glycol from glycerol by a high pressure and temperature hydrogenation reaction is described. In a particular embodiment, a base is present in the solvent mixture with an alkanol or ether of the alkanol. The reaction progresses over a transition metal catalyst. Propylene glycol is used for antifreeze and deicing compositions.
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