Process for producing phenol
First Claim
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1. A process for producing phenol, 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 said effluent stream to at least one dehydrogenation reaction zone; and
(d) contacting said at least a portion of said effluent stream with a dehydrogenation catalyst in said dehydrogenation reaction zone under dehydrogenation conditions including a temperature of 250°
C. to 500°
C. effective to convert at least part of the cyclohexanone in said at least a portion of said effluent stream into phenol and hydrogen.
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Abstract
In a process for producing phenol, 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 dehydrogenation reaction zone, where the effluent stream portion is contacted with a dehydrogenation catalyst under conditions effective to convert at least part of the cyclohexanone in the effluent portion into phenol and hydrogen.
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Citations
16 Claims
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1. A process for producing phenol, 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 said effluent stream to at least one dehydrogenation reaction zone; and (d) contacting said at least a portion of said effluent stream with a dehydrogenation catalyst in said dehydrogenation reaction zone under dehydrogenation conditions including a temperature of 250°
C. to 500°
C. effective to convert at least part of the cyclohexanone in said at least a portion of said effluent stream into phenol and hydrogen. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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2. A process for producing phenol from benzene, the process comprising:
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(a1) contacting benzene and hydrogen with a catalyst under hydroalkylation conditions to produce cyclohexylbenzene; (a) oxidizing cyclohexylbenzene from said contacting (a1) to produce cyclohexylbenzene hydroperoxide; (b) converting cyclohexylbenzene hydroperoxide from said oxidizing (a) to produce an effluent stream comprising phenol and cyclohexanone; (c) feeding at least a portion of said effluent stream to at least one dehydrogenation reaction zone; (d) contacting said at least a portion of said effluent stream with a dehydrogenation catalyst in said dehydrogenation reaction zone under dehydrogenation conditions effective to convert at least part of the cyclohexanone in said at least a portion of said effluent into phenol and hydrogen; and (e) recycling at least part of the hydrogen produced in (d) to said contacting (a1). - View Dependent Claims (3)
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Specification