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US 8,946,467 B2Granted
Process for liquid phase hydrogenation of phthalates
AssigneeExxonMobil Chemical Patents Inc.
InventorTravis Allen Reine
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Abstract
Disclosed is a process for the liquid phase hydrogenation of phthalates to cyclohexanoates. By using a reactor with a multiplicity of tubes, with a cooling fluid supplied to the outside of the tubes, shortcomings of traditional recycle mode fixed bed reactors can be overcome. Feed dilution can be avoided, resulting in much higher reaction rates.
Claims13
A process for the liquid phase hydrogenation of phthalates to cyclohexanoates, the process comprising:
- (a) feeding a liquid feed comprising phthalates and a gas feed comprising hydrogen to a multiplicity of tubes containing a catalyst;
- (b) converting at least part of the phthalates to cyclohexanoates in the tubes;
- and
- (c) supplying a cooling fluid to the outside of the tubes so as to maintain the temperature in the tubes in a desired range
- wherein the liquid feed is not mixed with a diluent stream and makes a single pass through the tubes.
2 more elements
A process according to 1, wherein the liquid feed comprises 90 to 100% phthalate.
Dependencies are inferred from the claim text.