A high-efficiency energy-saving refining system for dehydrogenation production of cyclohexanone

By improving the design of the alcohol tower to directly enter the top of the tower and the alcohol-ketone drying tower, the problems of high steam consumption and low product purity in cyclohexanone production have been solved, achieving energy saving, consumption reduction and product quality improvement.

CN224442985UActive Publication Date: 2026-07-03XUYANG ENG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
XUYANG ENG CO LTD
Filing Date
2025-06-27
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

The existing cyclohexanone production process consumes a large amount of steam, resulting in high energy consumption, and the product purity and yield are substandard. In particular, the gas phase at the top of the alcohol tower is prone to contain heavy components, which leads to substandard cyclohexanone purity.

Method used

The process of directly feeding the alcohol to the top of the tower eliminates the need for top reflux. An alcohol-ketone drying tower is added to utilize the heat from the reaction products. A two-phase gas-liquid feed is used, and gas-liquid separation is achieved in the alcohol-ketone drying tower through an inverted funnel-type feed distributor and a spiral guide vane structure, thereby improving hydrogen purity and reducing steam consumption.

Benefits of technology

It reduced steam consumption, improved hydrogen purity and cyclohexanone product purity, saved production costs, and increased cyclohexanol recovery rate.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model belongs to the field of chemical production technology, specifically relating to a high-efficiency and energy-saving refining system for the dehydrogenation production of cyclohexanone. It includes an alcohol column, a dehydrogenation heat exchanger, a dehydrogenation reactor, an alcohol column feed heat exchanger, a dehydration column, a light component column (sub-column 1), a light component column (sub-column 2), a ketone column, and an alcohol recovery column, connected in sequence. The middle inlet of the alcohol column is connected to the tube-side outlet of the alcohol column feed heat exchanger, the top outlet of the alcohol column is connected to the tube-side inlet of the dehydrogenation heat exchanger, and the bottom outlet of the alcohol column is connected to the middle inlet of the alcohol recovery column. An alcohol-ketone drying column is added between the alcohol column feed heat exchanger and the dehydration column. The inlet of the alcohol-ketone drying column is connected to the shell-side outlet of the alcohol column feed heat exchanger, and the liquid phase outlet of the alcohol-ketone drying column is connected to the upper inlet of the dehydration column. In this utility model, the alcohol column adopts a process where the raw material directly enters the top of the column, eliminating the need for top reflux, reducing steam consumption, and achieving energy saving.
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