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US 12,378,212 B2Granted
Process for removing poly(propylene oxide) from propylene oxide by membrane separation
AssigneeShell USA, Inc.
InventorsJohannes Leendert Willem Cornelis Den Boestert, Adrianus Robert Storm
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Abstract
The invention relates to a process for removing 5poly(propylene oxide) from propylene oxide, comprising: a) sending a stream comprising propylene oxide and poly(propylene oxide) to a filtration screen having openings with an average diameter of at most 50 μm; and b) sending the filtrate stream resulting from step a) to a membrane 10 having an average pore size of from 0 to 30 nm and recovering a permeate stream from the membrane as a purified propylene oxide stream.
Claims6
Process for removing poly(propylene oxide) from propylene oxide, comprising:
- a) sending a stream comprising propylene oxide and poly(propylene oxide) to a filtration screen having openings with an average diameter of at most 50 μm, wherein the filtration screen is a self-cleaning filtration (SCF) screen;
- and
- b) sending the filtrate stream resulting from step a) to a membrane having an average pore size of from 0 to 30 nm and recovering a permeate stream from the membrane as a purified propylene oxide stream.
Dependencies are inferred from the claim text.