The effect of acetylene in polymer-grade propylene and how to remove it during the refining process
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What is the impact of an acetylene content of ≤10 ppm in polymer-grade propylene on the polypropylene polymerization reaction? How to reduce its content?
This post was last edited by Dariga on 2020-8-14 21:38. Remove one tower.
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Generally, alkenes such as propyne are present in propylene, and hydrogenation using catalysts like Pd is typically employed to remove them. Processes such as Unipol use a MAP tower for removal. I think dienes readily react with hydrogen. Acrylic contains acetylene, which should normally be separated during production. Yes, the MAP tower might also be able to remove it. Acetylene can also react with hydrogen, and if ethylene is produced, it can easily form random copolymers with propylene. A few PPm should have little impact on performance, depending on the product requirements and whether acetylene is present on a long-term basis.