October 2014

Catalyst Development

Increase polypropylene production via ultra-low levels of carbon monoxide—Case study

This case study investigates using ultra-low levels of carbon monoxide (CO) in propylene to increase polypropylene (PP) production. CO is a severe poison to catalyst systems for both Ziegler-Natta (Z-..

This case study investigates using ultra-low levels of carbon monoxide (CO) in propylene to increase polypropylene (PP) production. CO is a severe poison to catalyst systems for both Ziegler-Natta (Z-N) and metallocene PP processes. TASNEE faced the challenge of finding a reliable and an economically viable solution to solve this problem. Thermal separation processes can lower CO levels to 50 ppbv–100 ppbv economically. However, these CO levels are still too high for high-efficiency polymerization. At such ultra-low-purification levels for propylene, a new catalyst acts like a CO catcher for liquid hydrocarbons; it is capable of reducing the CO levels in propylene to single-digit ppb

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