..Is deep cryogenic separation used for the separation of olefins?
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This post was last edited by liaifeng on 2018-7-28 at 10:30. Is deep cryogenic separation used for the separation of olefins?
Methanol-to-olefins processes all use medium-temperature separation, while traditional ethylene processes use deep-temperature separation.
Then we need to see which olefins will separate. To separate ethane from ethylene, cryogenic methods are required, whereas cryogenic methods are not needed to separate butenes.
In the MTO process, cryogenic separation is not used. Propane removal + hydrogenation + propane washing is used
In MTO, the methane hydrogen content is low while the partial pressure of olefins is high; deep cooling is not necessary – a propane wash or oil absorption is sufficient:D