Process for producing polyhydric alcohol

Details Process for producing polyhydric alcohol Process for producing polyhydric alcohol

1998-07-17

2000-06-20

Stockton, Laura L.

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

Organic compounds

Oxygen containing

C07C 2938, C07C 3122, C07C 4721

Patent

active

060779802

ABSTRACT:
A process for producing a polyhydric alcohol which comprises subjecting formaldehyde and a specific aliphatic aldehyde to an aldol condensation reaction in the presence of a base catalyst, and then subjecting the resultant reaction product to a crossed Cannizzaro reaction, while separating 2-alkenal formed as a byproduct during the aldol condensation reaction, prior to the completion of the crossed Cannizzaro reaction. Also a process for producing a polyhydric alcohol which comprises reacting formaldehyde with a 2-alkenal, such as that obtained in the aldol condensation reaction, in the presence of a base catalyst, then subjecting the resultant reaction product and a specific aliphatic aldehyde to an aldol condensation reaction, and subsequently subjecting the resultant reaction product to a crossed Cannizzaro reaction. The processes provide a polyhydric alcohol in high selectivity with a minimum excess of formaldehyde, without substantially by-producing a 2-alkenal.

REFERENCES:
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patent: 5608121 (1997-03-01), Ninomiya et al.
Terelak et al., Przem. Chem. (1994), 73(8), 296-7.
L. Cairate et al., "On the intermediates in the synthesis of trimethylolpropane", La Chemica E L'Industria, vol. 63, No. 11, pp. 723-725, Nov. 1981.

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