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Process for producing cyclohexylbenzene

A technology of cyclohexylbenzene and cyclohexanone, applied in the field of preparing cyclohexylbenzene, can solve problems such as the increase of the cost of propylene

Inactive Publication Date: 2010-08-04
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the cost of propylene is likely to increase due to the increasing shortage of propylene

Method used

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  • Process for producing cyclohexylbenzene

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Embodiment

[0059]To illustrate the importance of the location of the hydrogenation metal in hydroalkylation, Table 1 below compares the presence of the same amount of palladium, but with palladium on a molecular sieve (catalyst A) or on an inorganic oxide support (catalyst B). Performance of two catalysts A and B. Both catalysts contained 0.006 g of Pd and 1.6 g of MCM-49, with Catalyst A containing 0.4 g gamma alumina support and Catalyst B containing 2.0 g gamma alumina support.

[0060] Catalyst A was prepared by depositing palladium onto MCM-49 zeolite by incipient wetness technique. The gamma alumina was then added to the Pd-impregnated MCM-49 to form a mixture. The mixture was then pelletized using a hand press at 136,000 kPaa for 60 seconds to form pellets. The pellets were then sized to pass through 0.841 mm openings but not 0.250 mm openings (20 / 60 mesh pellets) and tested for benzene hydroalkylation performance. With Catalyst A, all palladium was on molecular sieves.

[006...

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Abstract

In a process for producing cyclohexylbenzene, benzene and hydrogen are contacted with a catalyst under hydroalkylation conditions to produce an effluent containing cyclohexylbenzene. The catalyst comprises a composite of a molecular sieve, an inorganic oxide different from said molecular sieve and at least one hydrogenation metal, wherein at least 50 wt% of said hydrogenation metal is supported on the inorganic oxide.

Description

technical field [0001] The present invention relates to a process for the preparation of cyclohexylbenzene and optionally for the conversion of the resulting cyclohexylbenzene to phenol and cyclohexanone. Background technique [0002] Phenol is an important product in the chemical industry and is used, for example, in the preparation of phenolic resins, bisphenol A, ε-caprolactam, adipic acid and plasticizers. [0003] Currently, the most common route for phenol production is the Hock process. This is a three-step process in which the first step involves the alkylation of benzene with propylene to produce cumene, followed by oxidation of cumene to the corresponding hydroperoxide, which is then cleaved to produce equimolar amounts of phenol and acetone. However, the global demand for phenol is growing more rapidly than the demand for acetone. In addition, the cost of propylene is likely to increase due to the increasing shortage of propylene. [0004] Thus, a process empl...

Claims

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Application Information

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IPC IPC(8): C07C2/74C07C45/53C07C13/28C07C49/403
CPCC07C2/74C07C37/07C07C2523/14C07C6/126C07C2523/75C07C45/53C07C2523/06C07C2523/755C07C409/14C07C2523/44C07C2101/14C07C2521/06C07C2523/46C07C2521/04C07C37/08C07C407/00Y02P20/52C07C2601/14C07C13/28C07C49/403C07C39/04B01J29/72B01J35/00
Inventor T-J·陈J·S·布坎南J·C·程T·E·赫尔登
Owner EXXONMOBIL CHEM PAT INC
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