发明申请
- 专利标题: PROCESS FOR PREPARING 1,3-PROPANEDIOL
- 专利标题(中): 制备1,3-丙二醇的方法
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申请号: US11950294申请日: 2007-12-04
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公开(公告)号: US20080154071A1公开(公告)日: 2008-06-26
- 发明人: Douglas Lee Husen , Glenn Charles Komplin , Joseph Broun Powell , Paul Richard Weider
- 申请人: Douglas Lee Husen , Glenn Charles Komplin , Joseph Broun Powell , Paul Richard Weider
- 主分类号: C07C29/141
- IPC分类号: C07C29/141
摘要:
The invention provides a process for preparing 1,3-alkanediols, such as 1,3-propanediol (PDO), from 3-hydroxyaldehydes, such as 3-hydroxypropanal (HPA), comprising providing a mixture of 3-hydroxyaldehydes in an organic solvent; extracting into an aqueous liquid a major portion of the 3-hydroxyaldehydes to provide an aqueous phase comprising 3-hydroxyaldehydes in greater concentration than the concentration of 3-hydroxyaldehydes in the 3-hydroxyaldehyde mixture, and an organic phase; separating the aqueous phase from the organic phase; contacting the aqueous phase with hydrogen in the presence of a hydrogenation catalyst to provide a hydrogenation product mixture comprising 1,3-alkanediols and water; separating water from the 1,3-alkanediols using a multi-effect evaporation scheme; recycling water containing about 50 wt % or less 1,3-propanediol based upon the total amount of 1,3-propanediol and water to the extraction stage; and recovering 1,3-alkanediols.
公开/授权文献
- US08013192B2 Process for preparing 1,3-propanediol 公开/授权日:2011-09-06