Process for the production of 2-ethylhexanol

Details Process for the production of 2-ethylhexanol Process for the production of 2-ethylhexanol

1992-07-17

1993-07-13

Evans, Joseph E.

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

Organic compounds

Oxygen containing

568491, 568492, C07C 29141, C07C 31125, C07C 4585, C07C 4578

Patent

active

052275442

ABSTRACT:
The present invention provides a process for producing 2-ethylhexanol having a reduced concentration of 2-ethyl-4-methyl pentanol. It may be practiced in its most basic form as a distillation. It may also be practiced as part of a multi-stage continuous process. In either form it begins with a feed stream comprising n-butyraldehyde containing as a contaminant, isobutyraldehyde, complexes of isobutyraldehyde, oligomers of isobutyraldehyde and mixtures thereof, to which is added or introduced, an amount of water effective to hydrolyze the oligomeric contaminants to the monomeric form of isobutyraldehyde during distillation. The water containing aldehyde mixture is introduced to a distillation zone with a residence time and at a temperature sufficient to hydrolyze the oligomeric contaminants to and then distill substantially all of the isobutyraldehyde overhead. In the multi-stage process, the distilled n-butyraldehyde is then subjected to an alkali-catalyzed aldol condensation reaction to produce 2-ethylhex-2-enal. In a third stage, the 2-ethylhex-2-enal is hydrogenated with a catalyst under temperature and pressure conditions conducive to hydrogenation to produce 2-ethylhexanol.

REFERENCES:
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patent: 1724761 (1929-08-01), Holden
patent: 3288866 (1966-11-01), Cooper
patent: 3491158 (1970-01-01), Reich
patent: 4138588 (1979-02-01), Tummes et al.
patent: 4426541 (1984-01-01), King
patent: 4684750 (1987-08-01), Kessen et al.
patent: 4960960 (1990-10-01), Harrison et al.

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