Process for the hydration of cyclohexene

CN122167262APending Publication Date: 2026-06-09SINOPEC GUANGZHOU ENG CO LTD +1

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SINOPEC GUANGZHOU ENG CO LTD
Filing Date
2024-12-09
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In the existing hydration process for producing cyclohexanol, catalyst particles easily clog the trays and reboilers, leading to decreased heat transfer efficiency, reduced product yield, high energy consumption, and safety hazards. Furthermore, the catalyst is discharged as waste oil, resulting in material loss and high operating costs.

Method used

The reaction products are treated using adiabatic or isothermal flash evaporation technology, combined with filtration or liquid-liquid separation technology, to recover the catalyst and reduce its contact in the cyclohexanol separation tower. Solid-liquid separation is achieved through flash evaporation, filtration equipment and liquid-liquid separation equipment, thereby reducing energy consumption and eliminating safety hazards.

Benefits of technology

Effective catalyst recovery reduces product yield, lowers risk, reduces energy consumption, avoids tray blockage and safety hazards, reduces operating costs, and improves production safety.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses an energy-saving and consumption-reducing process for the aqueous production of cyclohexanol, characterized by the following steps: 1) The oil phase product discharged from the reactor is first flash-evaporated; 2) The flash-evaporated vapor phase enters the cyclohexanol separation tower, and the liquid phase after flash evaporation enters the filtration equipment; 3) The filtered clear liquid enters the cyclohexanol separation tower, and the catalyst particles are discharged from the filtration equipment. The advantages of this invention are: eliminating the safety hazards caused by flash evaporation of the feed liquid in the cyclohexanol separation tower; reducing the flow rate entering the filtration equipment after flash evaporation, thus reducing the investment in the required filter equipment; and allowing for secondary liquid-liquid separation within the flash evaporation equipment, reducing the amount of water entering the cyclohexanol separation tower and lowering its energy consumption.
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