Recovery method and recovery device for ethylene in ethylene gas containing sealing oil
By absorbing and analyzing the sealing oil-containing ethylene gas using glycol diacetate, the problem of difficulty in efficient recycling of ethylene in the circulating gas in the vinyl acetate production process in the prior art is solved, and efficient recycling of ethylene is achieved and energy consumption and catalyst damage is reduced.
CN119751195AActive Publication Date: 2025-04-04EAST CHINA UNIV OF SCI & TECH
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Patent Information
- Application Number
- CN202510273626.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2045-03-10
AI Technical Summary
Technical Problem
The prior art is difficult to efficiently recover ethylene containing sealing oil in the circulating gases during the vinyl acetate production process, resulting in ethylene waste and catalyst poisoning.
Method used
Ethylene glycol diacetate (EGDA) is used as solvent to absorb and analyze the ethylene gas containing sealing oil, and the ethylene gas is recovered by flash evaporation under reduced pressure, and EGDA is recovered through distillation to achieve continuous and stable operation.
Benefits of technology
Efficient recovery of ethylene in ethylene gas containing sealing oil is achieved, reducing ethylene consumption and catalyst damage, and reducing energy consumption in subsequent distillation stages.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention provides a method and a device for recovering ethylene in ethylene gas containing sealing oil, and relates to the technical field of ethylene recovery. According to the method, ethylene glycol diacetate is used as a solvent to absorb ethylene in the ethylene gas containing sealing oil, and the obtained ethylene-rich solution is analyzed, so that efficient separation and recovery of ethylene can be realized, the recovery rate of ethylene is high, and the recovered ethylene can be directly used for producing vinyl acetate by an ethylene method; the consumption of an ethylene raw material in the process of producing vinyl acetate by an ethylene method is greatly reduced. Moreover, a byproduct ethylene glycol diacetate is generated in the process of producing vinyl acetate by using an ethylene method, and the ethylene glycol diacetate (EGDA) is used as a solvent, so that new impurities are not introduced.
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