Distillation: processes – separatory – With disparate physical separation – Utilizing removing solid from liquid
Patent
1983-08-29
1988-08-30
Lacey, David L.
Distillation: processes, separatory
With disparate physical separation
Utilizing removing solid from liquid
203 92, 203 96, 540540, B01D 314, B01D 338
Patent
active
047675039
ABSTRACT:
This invention is a method of purifying crude caprolactam. The improved method comprises taking a portion of a process stream of crude caprolactam having low boiling impurities and distilling the stream in the presence of water by fractional distillation into an overhead containing water and low boiling impurities and bottoms of caprolactam having improved purity and low water content.
The improvement also comprises taking a low water content stream of crude caprolactam having low boiling impurities and adding water to the stream and distilling the stream by fractional distillation as described above.
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Kirk-Othmer, "Encyclopedia of Chemical Technology", 3rd ed., vol. 18, 1807-1982, pp. 425-436.
Oldershaw, "Perforted Plate Column for Analytical Batch Distillation", vol. 13, pp. 265-268, Apr. 1941.
Crescentini Lamberto
DeCaprio Joseph D.
Fisher William B.
Lilley, Jr. Roy J.
Allied Corporation
Anderson Richard A.
Lacey David L.
Manoharan V.
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