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Richard J. Conk, Steven Hanna, Jake X. Shi, Ji Yang, Nicodemo R. Ciccia, Liang Qi, Brandon J. Bloomer, Steffen Heuvel, Tyler Wills, Ji Su, Alexis T. Bell, John F. Hartwig
The conversion of polyolefins to monomers would create a valuable carbon feedstock from the largest fraction of waste plastic. However, breakdown of the main chains in these polymers requires the cleavage of carbon–carbon bonds that tend to resist selective chemical transformations. Here, we report the production of propylene by partial dehydrogenation of polyethylene and tandem isomerizing ethenolysis of the desaturated chain. Dehydrogenation of high-density polyethylene with either an iridium-pincer complex or platinum/zinc supported on silica as catalysts yielded dehydrogenated material containing up to 3.2% internal olefins; the combination of a second-generation Hoveyda-Grubbs metathesis catalyst and [PdP( t Bu) 3 (μ-Br)] 2 as an isomerization catalyst selectively degraded this unsaturated polymer to propylene in yields exceeding 80%. These results show promise for the application of mild catalysis to deconstruct otherwise stable polyolefins.
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Conk, R. J., Hanna, S., Shi, J. X., Yang, J., Ciccia, N. R., Qi, L., Bloomer, B. J., Heuvel, S., Wills, T., Su, J., Bell, A. T., & Hartwig, J. F. (2022). Catalytic deconstruction of waste polyethylene with ethylene to form propylene. Science, 377(6614), 1561–1566. https://doi.org/10.1126/science.add1088
Conk, Richard J., et al. "Catalytic deconstruction of waste polyethylene with ethylene to form propylene." Science, vol. 377, no. 6614, 2022, pp. 1561–1566, https://doi.org/10.1126/science.add1088.
Conk, Richard J., Steven Hanna, Jake X. Shi, Ji Yang, Nicodemo R. Ciccia, Liang Qi, Brandon J. Bloomer, et al. "Catalytic deconstruction of waste polyethylene with ethylene to form propylene." Science 377, no. 6614 (2022): 1561–1566. https://doi.org/10.1126/science.add1088.
Conk R. J., Hanna S., Shi J. X. [и др.] Catalytic deconstruction of waste polyethylene with ethylene to form propylene // Science. — 2022. — Vol. 377, № 6614. — P. 1561–1566. — URL: https://doi.org/10.1126/science.add1088
@article{conk2022catalytic,
title = {{Catalytic deconstruction of waste polyethylene with ethylene to form propylene}},
author = {Richard J. Conk and Steven Hanna and Jake X. Shi and Ji Yang and Nicodemo R. Ciccia and Liang Qi and Brandon J. Bloomer and Steffen Heuvel and Tyler Wills and Ji Su and Alexis T. Bell and John F. Hartwig},
journal = {Science},
year = {2022},
volume = {377},
number = {6614},
pages = {1561--1566},
doi = {10.1126/science.add1088},
url = {https://doi.org/10.1126/science.add1088}
}TY - JOUR AU - Conk, Richard J. AU - Hanna, Steven AU - Shi, Jake X. AU - Yang, Ji AU - Ciccia, Nicodemo R. AU - Qi, Liang AU - Bloomer, Brandon J. AU - Heuvel, Steffen AU - Wills, Tyler AU - Su, Ji AU - Bell, Alexis T. AU - Hartwig, John F. TI - Catalytic deconstruction of waste polyethylene with ethylene to form propylene JO - Science VL - 377 IS - 6614 SP - 1561 EP - 1566 PY - 2022 DA - 2022/09/29 DO - 10.1126/science.add1088 UR - https://doi.org/10.1126/science.add1088 ER -
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