A method for side-line recovery of refined tetra- docosine

By combining the third and fourth distillation columns and using a side-stream extraction method to optimize the refining process of tetracyclododecene, the problems of resource waste and high energy consumption caused by the low purity of dicyclopentadiene were solved, and efficient and energy-saving tetracyclododecene production was achieved.

CN122277356APending Publication Date: 2026-06-26CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2024-12-24
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

In the existing tetracyclododecene refining process, the low purity of dicyclopentadiene leads to a large number of impurities, serious resource waste, high equipment complexity and energy consumption, and dicyclopentadiene cannot be recycled.

Method used

Using high-purity dicyclopentadiene as raw material, and combining the third and fourth distillation columns, high-purity tetracyclododecene product is directly obtained through side-stream sampling, and dicyclopentadiene at the top of the columns is recovered, thus optimizing the distillation process.

Benefits of technology

Significantly reduce equipment costs and energy consumption, improve the utilization rate of dicyclopentadiene, and obtain high-purity tetracyclododecene products.

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Abstract

This invention discloses a method for side-stream extraction of refined tetracyclododecene, comprising: using dicyclopentadiene, ethylene, and norbornene as raw materials, and toluene as solvent, conducting a Diels-Alder reaction in a batch reactor to obtain crude tetracyclododecene product; removing ethylene, norbornene, and toluene from the crude product by atmospheric distillation, and then sending it to a vacuum distillation column; in the vacuum distillation column, dicyclopentadiene and tetracyclododecene products are obtained at the top of the column, high-purity tetracyclododecene product is obtained by side-stream extraction, and heavy components are removed from the bottom of the column.
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