Method of producing lower alcohols from glycerol
First Claim
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1. A process for converting glycerol to propylene glycol with high selectivity, comprising the steps of:
- combining a glycerol-containing feedstock with a catalyst that is capable of hydrogenating glycerol, to form a reaction mixture;
heating the reaction mixture to a temperature ranging from 150°
to 250°
C. and at a pressure ranging from 0.2 to 25 bar;
simultaneously with the step of heating, removing vapor effluent from the reaction mixture by the action of hydrogen gas to form removed products, andcatalytically reacting the removed products to yield propylene glycol.
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Abstract
A reactive-separation process converts glycerin into lower alcohols, having boiling points less than 200° C., at high yields. Conversion of natural glycerin to propylene glycol through an acetol intermediate is achieved at temperatures from 150° to 250° C. at a pressure ranging from 1 and 25 bar. The preferred applications of the propylene glycol are as an antifreeze, deicing compound, or anti-icing compound. The preferred catalyst for this process in a copper-chromium powder.
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Citations
11 Claims
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1. A process for converting glycerol to propylene glycol with high selectivity, comprising the steps of:
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combining a glycerol-containing feedstock with a catalyst that is capable of hydrogenating glycerol, to form a reaction mixture; heating the reaction mixture to a temperature ranging from 150°
to 250°
C. and at a pressure ranging from 0.2 to 25 bar;simultaneously with the step of heating, removing vapor effluent from the reaction mixture by the action of hydrogen gas to form removed products, and catalytically reacting the removed products to yield propylene glycol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification