A c2 and c3+ recovery system integrating membrane separation, mofs process

By integrating membrane separation and MOFs processes, the problem of difficult recovery of C2 and C3+ components in associated gas from oil fields has been solved, achieving efficient resource utilization and improved economic benefits, and producing high-quality LNG and liquefied ethane.

CN122168324APending Publication Date: 2026-06-09TIANBANG NAT ENG RES CENT OF MEMBRANE TECH +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANBANG NAT ENG RES CENT OF MEMBRANE TECH
Filing Date
2026-03-05
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing technologies are insufficient for the efficient recovery of light hydrocarbon components, especially C2 and C3+ components, from associated gas in oil fields, resulting in low resource utilization efficiency and insufficient economic benefits.

Method used

Integrating membrane separation technology and MOF (Metal-Organic Fusion) processes, this method achieves efficient separation and recovery of C2 and C3+ through compression condensation, membrane separation, and MOF absorption and adsorption. Specific steps include recovering light hydrocarbons via compression condensation, further purifying C1 and C2 components using membrane separation, and using the MOF process for C1-C2 separation, ultimately producing high-quality LNG and liquefied ethane.

Benefits of technology

It has achieved efficient recovery of C3+ light hydrocarbons from associated gas in oil fields, improved resource utilization efficiency, increased economic benefits, and met the production needs of high-quality LNG and liquefied ethane.

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Abstract

This invention discloses an integrated membrane separation and MOFs process for C2 and C3+ recovery, comprising a decarbonization unit, a dehydration and mercury removal unit, a heat exchanger, a condenser, a cryogenic separator, a low-pressure separator, a light hydrocarbon storage and transportation unit, an LNG production unit, membrane separation I, membrane separation II, a propane cooler, an absorption and adsorption tower, a lean and rich liquid heat exchanger, a kettle reboiler, a desorption tower, a booster pump, a lean liquid cooler, a drying system, and an ethane liquefaction unit, as well as a system structure designed according to the process route. This system is applied to the processing of associated gas from oil fields, fully utilizing condensation to recover C3+ light hydrocarbons, further purifying C1 and C2 through membrane separation, and separating C1 and C2 using MOFs technology, achieving the goal of recovering C3+ light hydrocarbons, producing high-quality LNG and liquefied ethane, thereby increasing the economic benefits of resource utilization.
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