Preparation method and preparation system of cyclohexanone

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...

AI Technical Summary

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 Sciences and other units using a new method solves the problem that the synthesis of TS-1 molecular sieve is difficult to repeat and the reactivity is not easy to stabilize.

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