Method of preparation of 1,2- and 1,3- propanediol

专利名称：Method of preparation of 1,2- and 1,3-propanediol

发明人：HAAS, THOMAS,DR.,NEHER, ARMIN,

DR.,ARNTZ, DIETRICH, DR.,KLENK, HERBERT,DR.,GIRKE, WALTER

申请号：EP93116791.0申请日：19931018公开号：EP0598228B1公开日：19960508

摘要：The invention relates to a method for the simultaneous preparation of 1,2- and1,3-propanediol from glycerol. 1,2-Propanediol is customarily prepared from propyleneoxide, 1,3-propanediol by hydration of acrolein with subsequent hydrogenation. Theprocess according to the invention comprises the reaction stages (a) dehydration ofglycerol by passing a gaseous glycerol/water mixture containing 10 to 40% by weight ofglycerol at 250 to 340@C over a solid catalyst having an Ho value (Hammett's acidfunction) of less than 2, preferably between -3 and -8.2, (b) hydration of the acroleincontained in the reaction mixture of stage (a) and (c) catalytic hydrogenation of thereaction mixture containing the 3-hydroxypropionaldehyde and hydroxyacetone of stage(b). Two useful substances, namely 1,2- and 1,3-propanediol, can simultaneously beobtained in a high total yield from glycerol in a simple process.

申请人：DEGUSSA AKTIENGESELLSCHAFT,DEGUSSA,DEGUSSA AKTIENGESELLSCHAFT

地址：DE

国籍：DE

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