Process for the simultaneous production of 1,2- and 1,3-propaned

Details Process for the simultaneous production of 1,2- and 1,3-propaned Process for the simultaneous production of 1,2- and 1,3-propaned

1993-11-12

1995-06-20

Richter, Johann

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568403, 568486, C07C 3120, C07C 29141, C07C 29145

Patent

active

054262496

ABSTRACT:
A process is described for the simultaneous production of 1,2- and 1,3-propanediol from glycerol. The process involves the reaction stages (a) dehydration of glycerol by feeding a gaseous glycerol-water mixture with 10 to 40 wt % glycerol at 250.degree. to 340.degree. C. over a solid catalyst with an H.sub.0 value (Hammett acidity function) of less than 2, preferably between -3 and -8.2, (b) hydration of the acrolein contained in the reaction mixture of stage (a), and (c) catalytic hydrogenation of the reaction mixture, containing 3-hydroxypropionaldehyde and hydroxyacetone, of stage (b). Two valuable products, namely 1,2- and 1,3-propanediol, can be obtained simultaneously and in high total yield from glycerol in a simple process.

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