US 11,945,771 B1
Catalyzed depolymerization of a chemically complex feedstock
Cori Demmelmaier-Chang, Houston, TX (US); Mark L. Hlavinka, Kingwood, TX (US); Sikander Hakim, Kingwood, TX (US); Gabriela Alvez, Kingwood, TX (US); Joseph Bergmeister, Spring, TX (US); and Steven Lim, Houston, TX (US)
Assigned to Chevron Phillips Chemical Company LP, The Woodlands, TX (US)
Filed by Chevron Phillips Chemical Company LP, The Woodlands, TX (US)
Filed on Nov. 1, 2022, as Appl. No. 18/051,718.
Int. Cl. C07C 4/22 (2006.01)
CPC C07C 4/22 (2013.01) [C07C 2529/06 (2013.01)] 38 Claims
OG exemplary drawing
 
1. A process for converting plastic waste, the process comprising:
(a) providing a process feed comprising a polyolefin waste to a first heating zone and heating the process feed in the presence of a chemically-modified solid oxide comprising a solid oxide treated with an electron-withdrawing anion;
(b) combining a hydrocarbon co-feed with the process feed to form a reactor feed;
(c) providing the reactor feed to a second heating zone and contacting the reactor feed and a depolymerization catalyst under depolymerization conditions to form a reactor effluent; and
(d) separating the reactor effluent into a plurality of output streams, each output stream comprising a circular product.