Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1988-11-25
1990-06-19
Evans, J. E.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568853, C07C 2980, C07C 2986, C07C 3120
Patent
active
049355554
ABSTRACT:
In a process for the production of neopentyl glycol by hydrogenation of the aldol product of formaldehyde and isobutyraldehyde, an improvement comprises the wiped-film evaporator treatment of a saponified NPG-containing mixture. The process results in a very pure product and also eliminates the need for the addition of steam to the crude NPG, thus saving the cost of energy for removing the water from the NPG.
A further yield improvement is achieved by extracting NPG from the caustic residue with isobutyraldehyde and water. The isobutyraldehyde selectively recovers the NPG while the water selectively removes the caustic. The isobutyraldehyde and NPG are then conveniently recycled to the aldol reaction zone.
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Pfaudler's "Wiped Film Evaporator" Sales Bulletin SB 39-100-1, pp. 1-8, 1984.
Elias Carole L.
Fields Marvin C.
Evans J. E.
Krayer William L.
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