Process for the production of hydroxy-pivaldehyde

Details Process for the production of hydroxy-pivaldehyde Process for the production of hydroxy-pivaldehyde

1975-10-23

1977-07-19

Thomas, Jr., James O.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 4726

Patent

active

040368882

ABSTRACT:
A process for the production of hydroxy-pivaldehyde which comprises reacting formaldehyde with isobutyraldehyde in an approximate molar ratio of 1:2 in the presence of a catalytic amount of triethylamine, to produce a reaction mixture containing 42 to 50 wt% of hydroxy-pivaldehyde, 28 to 35 wt% of isubutyraldehyde, approximately 18 wt% of water, approximately 2 wt% of triethylamine, and approximately 18 wt% of secondary reaction products, and recovering hydroxy-pivaldehyde therefrom. The recovery steps include adding at least one part by weight of water to 1 part of the solution, distilling the solution obtained under reduced pressure at a temperature below 65.degree. C, to produce a distillate containing isobutyraldehyde, triethylamine and water, and an aqueous solution containing hydroxy-pivaldehyde, cooling the aqueous solution containing hydroxy-pivaldehyde, cooling the aqueous solution containing hydroxy-pivaldehyde to approximately 15.degree. to 20.degree. C to cause the crystallization of hydroxy-pivaldehyde, filtering off the crystals obtained, washing the crystals with cold water and then drying the crystals in air, and subjecting the mother liquors from the crystallization to liquid-liquid extraction at ambient temperature using approximately one volume of isobutyraldehyde to 3 volumes of the mother liquor.

REFERENCES:
patent: 2863878 (1958-12-01), Lynn
patent: 3865850 (1975-02-01), Merger
patent: 3876706 (1975-04-01), Levanevsky et al.
patent: 3935274 (1976-01-01), Jacobsen et al.

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