MARVIN CHESTER FIELDS
Engineers in Pittsburgh, PA
License number
Pennsylvania PE008520E
Category
Engineers
Type
Professional Engineer
Address
Address
Pittsburgh, PA 15235
Personal information
See more information about MARVIN CHESTER FIELDS at radaris.comName
Address
Phone
416 Grandview Dr, Verona, PA 15147
Easton, PA
Pittsburgh, PA
Professional information
Purification Of Neopentyl Glycol
US Patent:
4935555, Jun 19, 1990
Filed:
Nov 25, 1988
Appl. No.:
7/276002
Inventors:
Carole L. Elias - New Kensington PA
Marvin C. Fields - Pittsburgh PA
Marvin C. Fields - Pittsburgh PA
International Classification:
C07C 2980, C07C 2986, C07C 3120
US Classification:
568854
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.