Preparation method and preparation system of cyclohexanone

A technology of cyclohexanone and cyclohexane, which is applied in the field of preparation of cyclohexanone, can solve the problems of difficulty in repeating the synthesis of TS-1 molecular sieve, difficult synthesis of catalysts, difficult and stable reaction activity, etc. The effect of new hydrogen consumption and plant space saving

Pending Publication Date: 2017-04-26
FUJIAN EVERSUN TECH CO LTD
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  • Abstract
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Problems solved by technology

However, the synthesis of the catalyst itself is difficult and the activity is not stable
The HTS molecular sieve synthesized by the Institute of Petrochemical Science

Method used

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  • Preparation method and preparation system of cyclohexanone
  • Preparation method and preparation system of cyclohexanone
  • Preparation method and preparation system of cyclohexanone

Examples

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Embodiment 1

[0062] A method and system for producing cyclohexanone, which optimizes the traditional preparation process of cyclohexanone, and the specific processing method includes the following steps:

[0063] Step 1, benzene partial hydrogenation process

[0064] The raw material benzene sent from the tank group performs heat exchange with the benzene from the benzene preprocessor in the first, second and third heat exchangers of the benzene preprocessor. The preheated benzene is heated to about 150°C in the benzene pretreatment heater with medium-pressure steam and sent to the benzene pretreatment, where the benzene removes sulfur-containing impurities such as thiophene. The benzene from the benzene pretreatment is exchanged in the first, second and third heat exchangers of the benzene pretreatment, and then sent to the benzene pretreatment cooler to be cooled to 40°C with circulating water, and then sent together with the benzene recovered from the extraction and rectification proces...

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Abstract

The invention provides a production method and a production system of cyclohexanone. The method comprises the following steps of (1) a partial hydrogenation process of benzene; (2) an extractive distillation process; (3) a cyclohexanone treatment process; (4) a hydration process; (5) a hydrogenation catalyst regeneration process; (6) a hydration catalyst regeneration process; (7) a cyclohexanol dehydrogenation process; and (8) an alcohol ketone refining process. According to the production method and the production system of the cyclohexanone provided by the invention, a traditional production process and a traditional production system for preparing the cyclohexanone through a cyclohexene hydration method are optimized, the conversion rate of the raw material benzene is improved by more than 95 percent from 75 percent compared with a traditional process, the usage amount of new hydrogen during the partial hydrogenation process of the benzene is reduced, the selectivity of extraction agents during the extractive distillation process is improved, the extractant volume is reduced, the number of equipment is reduced, the space occupied by the equipment is reduced, and the like.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and relates to a preparation method and system of cyclohexanone, in particular to a preparation method and system of cyclohexanone which significantly improves the conversion rate of raw materials. Background technique [0002] Cyclohexanone is an important organic chemical product with excellent properties such as high solubility and low volatility. It is an ideal solvent for polymers such as nitrocellulose and cellulose. At the same time, cyclohexanone is also an important organic chemical. Chemical raw material, the main intermediate for the production of caprolactam and adipic acid. In 1893, A.Bayer first prepared cyclohexanone by dry distillation of pimelic acid and lime. In 1943, Farben Company in Germany built a production device for synthesizing cyclohexanone by hydrogenation of phenol. In 1960, the German BASF company built a large-scale production device for the synthes...

Claims

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Application Information

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IPC IPC(8): C07C5/11C07C7/00C07C7/08C07C13/20C07C29/04C07C29/80C07C35/08C07C45/00C07C45/82C07C49/403C07C5/367C07C15/04
CPCC07C5/11C07C5/367C07C7/005C07C7/08C07C29/04C07C29/80C07C45/002C07C45/82C07C13/20C07C35/08C07C49/403C07C15/04Y02P20/584
Inventor 吴道斌曹坚涂坤义李向伟瞿亚平刘戈吴望成单超
Owner FUJIAN EVERSUN TECH CO LTD
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