Processes and systems for removing a vinyl iodide impurity from a recycle gas stream in the production of ethylene oxide
A technology of circulating gas and ethylene oxide, applied in the field of reaction system, can solve problems such as poisoning
Active Publication Date: 2018-08-03
SHELL INT RES MAATSCHAPPIJ BV
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Problems solved by technology
[0011] Silver-based epoxidation catalysts commonly used in epoxidation reactors are susceptible to catalyst poisoning, specifically, poisoning by gaseous iodide-containing impurities such as alkyl iodides and vinyl iodide
Method used
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example 1
[0089] The investigation of potential guard bed materials was conducted with the understanding that an effective guard bed material would preferably exhibit a reduction in the concentration of vinyl iodide in the recycle gas stream to about 1 ppbv or even sub- Vinyl iodide removal efficiency of vinyl iodide at ppb level. Suitable guard bed materials will also need to operate efficiently even at extremely high space velocities, since high guard bed space velocities equate to relatively small (and affordable) guard bed sizes relative to catalyst bed sizes, and are shown for feed The components themselves are thermally stable and completely inert.
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Processes for reducing the amount of a gaseous iodide-containing impurity present in a recycle gas stream used in the production of ethylene oxide, in particular a vinyl iodide impurity, are provided.Processes for producing ethylene oxide, ethylene carbonate and / or ethylene glycol, and associated reaction systems are similarly provided.
Description
technical field [0001] The present invention relates to a reaction system for a process for the production of ethylene oxide, ethylene carbonate and / or ethylene glycol from ethylene. Background technique [0002] Monoethylene glycol is used as a raw material in the manufacture of polyester fibers, polyethylene terephthalate (PET) plastics, and resins. It is also incorporated into automotive antifreeze fluids. Ethylene carbonate is generally used as a solvent. [0003] Monoethylene glycol can be prepared commercially from ethylene oxide by various known methods. These processes, although varied, all generally involve a two-stage reaction system in which ethylene is first converted to ethylene oxide, which is then converted to ethylene glycol. In most industrial scale glycol manufacturing operations, the process for making and recovering ethylene oxide is integrated with the process for making ethylene glycol to maximize energy efficiency and reduce costs. [0004] In the ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C07D317/38C07D301/08C07C17/389C07C29/10C07C21/17C07C31/20B01D53/02B01D53/70
CPCB01D53/02C07D317/38C07D301/08B01D2253/112B01D2257/2068C07C17/38C07C29/12B01D2253/106B01D2253/25B01D2257/504B01D53/70C07D301/10C07D301/32Y02C20/40Y02P20/151Y02P20/50C07C31/202C07C21/17B01D53/04C07D303/04C07C19/07B01J8/0492
Inventor W·E·埃万斯M·F·勒曼斯基
Owner SHELL INT RES MAATSCHAPPIJ BV