Process for preparing alkanediols

Details Process for preparing alkanediols Process for preparing alkanediols

1996-10-15

1998-03-03

Geist, Gary

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

Organic compounds

Sulfur containing

568496, 568867, 568483, C07C 4702, C07C 2704, C07C 2700, C07C 4500

Patent

active

057233896

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 or rhodium catalyst and a cobalt or rhodium porphyrin 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 with the cobalt or rhodium catalyst.

REFERENCES:
patent: 3168553 (1965-02-01), Slaugh
patent: 3687981 (1972-08-01), Lawrence
patent: 4973741 (1990-11-01), Beavers
patent: 5210318 (1993-05-01), Briggs
patent: 5256827 (1993-10-01), Slaugh
patent: 5563144 (1996-10-01), Powell

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