A material returning device for a DMC separation column

By designing diffusion assembly two and diffusion assembly one in the DMC separation tower, uniform diffusion of the mixture was achieved, solving the problem of excessive local consumption of the catalyst packing layer, and improving separation efficiency and product quality.

CN224540989UActive Publication Date: 2026-07-24ANHUI DONGKE NEW MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ANHUI DONGKE NEW MATERIALS CO LTD
Filing Date
2025-08-26
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

The existing return device of the DMC separation tower causes the catalyst in some areas of the solid catalyst packing layer to be consumed too quickly and the dispersion to be uneven.

Method used

A second diffusion component was designed on the lower packing layer to achieve shaking diffusion, while a first diffusion component was set at the top of the rectification section to perform diversion diffusion, thereby extending the liquid residence time and diffusion range.

Benefits of technology

This effectively avoids the problem of excessively rapid local catalyst consumption, improving separation efficiency and product quality.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a kind of returning device of DMC separation tower, the separation tower includes tower body, the packing section being located in the inside of tower body, the distillation section being located below packing section and the rectification section being located above packing section, and the packing section includes upper packing layer and lower packing layer;The returning device includes distillation section returning component and rectification section returning component;The distillation section returning component includes returning pipeline two, conveying pump two being located on returning pipeline two, the nozzle being located at the output end of returning pipeline two, diffusion component two being located on lower packing layer.The utility model sets diffusion component two between upper packing layer and lower packing layer, can make the mixed system that is returned by returning pipeline two and conveying pump two and is shaken to diffuse, so as to be fully contacted with lower packing layer, promote the progress of ester exchange reaction, avoid the problem of local catalyst consumption too fast caused by concentratedly contacting with lower packing layer.
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