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Process for making cyclohexanone

A technology of cyclohexanone and cyclohexylbenzene, which is applied in the field of cyclohexanone manufacturing, can solve the problems of non-challenge and yield loss

Inactive Publication Date: 2016-04-06
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the phenol / cyclohexanone mixture necessarily contains a non-negligible amount of cyclohexylbenzene, which can be converted into bicyclohexane in the hydrogenation step, and since the hydrogenated phenol / cyclohexanone / cyclohexylbenzene mixture can also results in the formation of cyclohexanol, both of which result in a loss of yield, so this approach is not without its challenges

Method used

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  • Process for making cyclohexanone
  • Process for making cyclohexanone
  • Process for making cyclohexanone

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Embodiment approach

[0191] E1. a method for manufacturing cyclohexanone, the method may further comprise the steps:

[0192](1) the first mixture containing cyclohexanone, phenol, and cyclohexylbenzene is fed into the first distillation column;

[0193] (II) obtain from the first distillation column:

[0194] a first upper effluent comprising phenol, cyclohexylbenzene, and cyclohexanone at a concentration higher than that of the first mixture;

[0195] A first intermediate effluent comprising cyclohexanone, cyclohexylbenzene, bicyclohexane produced in step (III) below, and phenol at a concentration higher than in the first mixture; and

[0196] a first lower effluent comprising cyclohexylbenzene at a higher concentration than in the first mixture;

[0197] (III) at least a part of the first intermediate effluent and hydrogen are fed into the hydrogenation reaction zone, wherein under hydrogenation reaction conditions, in the presence of a hydrogenation catalyst, phenol is reacted with hydrogen,...

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Abstract

Disclosed are processes and systems for making cyclohexanone from a mixture comprising phenol, cyclohexanone, and cyclohexylbenzene, comprising a step of or a device for subjecting at least a portion of the mixture to hydrogenation and a step of or a device for distilling a phenol / cyclohexanone / cyclohexylbenzene mixture to obtain an effluent rich in cyclohexanone.

Description

[0001] Priority claims to related applications [0002] This application claims priority to US Provisional Application Serial No. 62 / 057,947, filed September 30, 2014, and European Application No. 15151425.4, filed January 16, 2015, the disclosures of which are incorporated herein by reference in their entirety. technical field [0003] The present invention relates to the manufacture method of cyclohexanone. In particular, the present invention relates to a process for the production of cyclohexanone by hydrogenation of phenol. The invention can be used, for example, for the production of cyclohexanone from the oxidation and cleavage of cyclohexylbenzene hydroperoxide. Background of the Invention [0004] Cyclohexanone is an important material in the chemical industry and is widely used, for example, in the production of phenol resins, bisphenol A, ε-caprolactam, adipic acid and plasticizers. One way to make cyclohexanone is by hydrogenating phenol. [0005] Currently, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C49/403C07C45/82C07C45/53C07C45/00
CPCC07C45/82B01D3/143C07C37/74C07C45/006C07C49/403C07C39/04C07C45/53C07C45/00
Inventor C·L·贝克尔J·D·戴维斯J·M·达卡K·C·纳德勒尔
Owner EXXONMOBIL CHEM PAT INC
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