Process for producing cyclohexanone
First Claim
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1. A process for producing cyclohexanone, the process comprising:
- (a) oxidizing cyclohexylbenzene to produce cyclohexylbenzene hydroperoxide;
(b) converting cyclohexylbenzene hydroperoxide from (a) to produce an effluent stream comprising phenol and cyclohexanone;
(c) feeding at least a portion of the effluent stream comprising phenol and cyclohexanone to at least one hydrogenation reaction zone; and
(d) contacting the effluent stream portion with hydrogen in the presence of a hydrogenation catalyst in the hydrogenation reaction zone under conditions effective to convert at least part of the phenol in the effluent portion into cyclohexanone.
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Abstract
In a process for producing cyclohexanone, cyclohexylbenzene is oxidized to produce cyclohexylbenzene hydroperoxide and then the resultant cyclohexylbenzene hydroperoxide is cleaved to produce an effluent stream comprising phenol and cyclohexanone. At least a portion of the effluent stream is then fed to at least one hydrogenation reaction zone, where the effluent stream portion is contacted with hydrogen in the presence of a hydrogenation catalyst under conditions effective to convert at least part of the phenol in the effluent portion into cyclohexanone.
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Citations
12 Claims
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1. A process for producing cyclohexanone, the process comprising:
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(a) oxidizing cyclohexylbenzene to produce cyclohexylbenzene hydroperoxide; (b) converting cyclohexylbenzene hydroperoxide from (a) to produce an effluent stream comprising phenol and cyclohexanone; (c) feeding at least a portion of the effluent stream comprising phenol and cyclohexanone to at least one hydrogenation reaction zone; and (d) contacting the effluent stream portion with hydrogen in the presence of a hydrogenation catalyst in the hydrogenation reaction zone under conditions effective to convert at least part of the phenol in the effluent portion into cyclohexanone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A process for producing cyclohexanone, the process comprising:
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(a) oxidizing cyclohexylbenzene to produce cyclohexylbenzene hydroperoxide; (b) converting cyclohexylbenzene hydroperoxide from (a) to produce an effluent stream comprising phenol and cyclohexanone; (c) feeding at least a portion of the effluent stream comprising phenol and cyclohexanone to at least one hydrogenation reaction zone; and (d) contacting the effluent stream portion with hydrogen in the presence of a hydrogenation catalyst in the hydrogenation reaction zone under conditions effective to convert at least part of the phenol in the effluent portion into cyclohexanone wherein the effluent stream produced by the converting (b) is subjected to at least one separation step such that the effluent stream portion fed to the hydrogenation reaction zone contains less cyclohexanone than the effluent stream produced by the converting (b).
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12. A process for producing cyclohexanone, the process comprising:
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(a) oxidizing cyclohexylbenzene to produce cyclohexylbenzene hydroperoxide; (b) converting cyclohexylbenzene hydroperoxide from (a) to produce an effluent stream comprising phenol and cyclohexanone; (c) feeding at least a portion of the effluent stream comprising phenol and cyclohexanone to at least one hydrogenation reaction zone; and (d) contacting the effluent stream portion with hydrogen in the presence of a hydrogenation catalyst in the hydrogenation reaction zone under conditions effective to convert at least part of the phenol in the effluent portion into cyclohexanone wherein the effluent stream portion fed to the hydrogenation reaction zone has the same composition as the effluent stream produced by the converting (b).
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Specification