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Preparation of 1,2-propanediol

  • US 5,616,817 A
  • Filed: 11/20/1995
  • Issued: 04/01/1997
  • Est. Priority Date: 11/26/1994
  • Status: Expired due to Term
First Claim
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1. A process for the preparation of 1,2-propanediol by catalytic hydrogenation of glycerol at elevated temperature and pressure, which comprises using glycerol having a water content of up to 20% by weight and a catalyst comprising the metals cobalt, copper, manganese and molybdenum in amounts of, based on the total weight of the catalyst,from 40 to 70% by weight of cobalt,from 10 to 20% by weight of copper,from 0 to 10% by weight of manganese andfrom 0 to 10% by weight of molybdenum,where this catalytically active material may additionally contain inorganic polyacids and/or heteropolyacids in an amount of up to 10% by weight, based on the total weight of the catalyst.

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