Method of producing lower alcohols from glycerol
First Claim
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1. A process for converting glycerol to acetol with high selectivity, comprising the steps of:
- combining a glycerol-containing feedstock with a catalyst that is capable of dehydrating glycerol to form a reaction mixture;
heating the reaction mixture at an effective temperature to allow dehydration of the glycerol at a pressure not exceeding 25 bar, said effective temperature being less than 250°
C.,the step of heating the reaction mixture being performed while limiting hydrogen reagent to form predominately acetol as the dehydration product of glycerol, andremoving the acetol from the reaction mixture in vapor form by action of a stripper gas.
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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
18 Claims
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1. A process for converting glycerol to acetol with high selectivity, comprising the steps of:
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combining a glycerol-containing feedstock with a catalyst that is capable of dehydrating glycerol to form a reaction mixture; heating the reaction mixture at an effective temperature to allow dehydration of the glycerol at a pressure not exceeding 25 bar, said effective temperature being less than 250°
C.,the step of heating the reaction mixture being performed while limiting hydrogen reagent to form predominately acetol as the dehydration product of glycerol, and removing the acetol from the reaction mixture in vapor form by action of a stripper gas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification