公开(公告)号：US20230009131A1

公开(公告)日：2023-01-12

申请号：US17860239

申请日：2022-07-08

Applicant: Basell Poliolefine Italia S.r.l.

Inventor： Sandor Nagy ,  Diego Brita ,  Christopher D. Smith ,  David A. Heaps ,  Daniel F. White ,  David L. Ramage

IPC: C08J11/16

Abstract: Pre-treatment methods for polyolefin-based feed streams before depolymerization are described. Polyolefins are separated from other material in the polyolefin-based feed stream using density differences in an aqueous solution, which allows for a pre-treatment method that does not affect the depolymerization catalyst. By removing the non-polyolefin materials from the feed stream, the depolymerization of the polyolefin material can proceed at lower temperatures for longer cycles. This results in a more efficient process with a smaller carbon footprint.