Back to results
US 10,570,079 B2Granted
Cyclohexanone compositions and processes for making such compositions
AssigneeExxonMobil Chemical Patents Inc.
InventorsAshley J. Malik, Jörg F. W. Weber, Medrado M. Leal
Life of this patent
Estimating the term…
Abstract
Disclosed are processes for making such cyclohexanone compositions from a mixture comprising phenol, cyclohexanone, and cyclohexylbenzene. Such cyclohexanone compositions comprise at least 99 wt % cyclohexanone, at most 0.15 wt % water, and at most 500 wppm combined of certain cyclohexanone impurities selected from the group consisting of: benzene, cyclohexene, pentanal, cyclopentanol, cyclohexanol, and phenol.
Claims16
A process of obtaining a cyclohexanone composition comprising:
- first producing cyclohexylbenzene by contacting benzene with hydrogen in the presence of a bifunctional catalyst comprising a molecular sieve of the MCM-22 type and at least one hydrogenation metal selected from palladium, ruthenium, nickel, cobalt, and mixtures thereof, to produce a crude feed of phenol, cyclohexanone and cyclohexylbenzene;
- isolating the cyclohexanone from the crude feed of phenol, cyclohexanone and cyclohexylbenzene by passing the crude feed through a first distillation column, a hydrogenation reactor, and a cyclohexanone purification column, wherein the crude feed passes through a sorbent bed before passing to the hydrogenation reactor, the sorbent bed configured to remove at least a portion of the sulfur-containing components and/or the light components from a crude feed;
- wherein the composition comprises:
- (a) at least 99 wt % cyclohexanone;
- (b) 0.15 wt % or less water;
- (c) 0 to 10 wppm benzene;
- (d) 5 to 10 wppm cyclohexene;
- (e) 0 to 10 wppm pentanal;
- (f) 0 to 50 wppm cyclopentanol;
- and
- (g) 10 wppm to 40 wppm cyclohexanol;
- and
- wherein the wt % and wppm are each based upon total weight of the cyclohexanone composition.
10 more elements
Dependencies are inferred from the claim text.