Hybrid hydrocarbon conversion apparatus and conversion method thereof

By integrating distillation and recycling reaction devices, the problem of carrier gas not being separated and reused in the process of isobutylene to n-butene was solved, achieving the effects of simplifying the process and reducing costs, and improving the yield of 2-butene.

CN116262178BActive Publication Date: 2026-07-07DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
Filing Date
2021-12-14
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing technologies fail to effectively utilize carrier gas in the process of preparing n-butene from isobutene, resulting in a complex and costly production process, and do not consider the separation and reuse of carrier gas.

Method used

The raw materials and reaction products are pretreated by integrated distillation. The separation of the "impurity-raw material-product" system is achieved through a circulating reaction device, which simplifies the production process. By using a combination of distillation column and reactor, isobutene and 1-butene are separated and catalytically reacted to produce 2-butene.

Benefits of technology

This technology enables continuous production of mixed C4 olefins, simplifies operation steps, reduces production costs, avoids the need for additional etherification separation units, and improves the yield of 2-butene.

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Abstract

The application discloses a mixed hydrocarbon conversion device and a conversion method thereof. The process flow adopts an integrated rectification-reaction-product separation sequential circulation operation. The mixed hydrocarbon conversion device is a circulation reaction device, which comprises a rectification unit and a reaction unit connected in sequence. The rectification unit comprises a rectification tower, and the rectification tower comprises a feeding end and a separation end. The feeding end comprises an inlet I and an inlet II, and the separation end comprises a light component liquid phase separator outlet, a heavy component liquid phase separator outlet and a gas phase separator outlet. The reaction unit comprises a reactor, and the reaction product outlet is connected with the inlet I. The normal butene product with a mass fraction of greater than 85% is separated from the unreacted raw material and the normal butene product return rectification tower by the rectification tower. The method is used for the continuous production of 2-butene from mixed C4 olefins, avoids the method of adding an etherification unit to separate isobutene in the traditional process, has a simple flow and is easy to operate, and reduces production cost.
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