Process for preparing alkanediols

Details Process for preparing alkanediols Process for preparing alkanediols

1996-07-23

1998-11-24

Ivy, C. Warren

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

Organic compounds

Oxygen containing

568451, 568852, 568862, C07C 2700

Patent

active

058410031

ABSTRACT:
An alkanediol such as 1,3-propanediol is prepared in a process which involves reacting an alkylene oxide with carbon monoxide and hydrogen in an essentially non-water-miscible solvent in the presence of a non-phosphine-ligated cobalt catalyst and a lipophilic ruthenium promoter to produce an intermediate product mixture containing a hydroxyalkanal in an amount less than 15 wt %; extracting the hydroxyalkanal from the intermediate product mixture into an aqueous liquid at a temperature less than about 100.degree. C. and separating the aqueous phase containing hydroxyalkanal from the organic phase containing cobalt catalyst; hydrogenating the hydroxyalkanal in the aqueous phase to an alkanediol; and recovering the alkanediol.
The process enables the production of an alkanediol such as 1,3-propanediol in high yields and selectivity without the use of a phosphine ligand-modified cobalt catalyst.

REFERENCES:
patent: 3168553 (1965-02-01), Slaugh
patent: 3687981 (1972-08-01), Lawrence et al.
patent: 4973741 (1990-11-01), Beavers
patent: 5030766 (1991-07-01), Briggs et al.
patent: 5135901 (1992-08-01), Beavers
patent: 5304691 (1994-04-01), Arhancet et al.
patent: 5463144 (1995-10-01), Powell et al.
Hidai, M. et al, J. Mol. Catal. 1986, 35(1), pp. 29-37, abstract only.

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