公开(公告)号：US20230312862A1

公开(公告)日：2023-10-05

申请号：US18128306

申请日：2023-03-30

Applicant: Chevron U.S.A. Inc.

Inventor： Tengfei LIU ,  Joel E. SCHMIDT ,  Hye-Kyung C. TIMKEN ,  Richard L. GROVE ,  Kaidong CHEN

IPC: C08J11/14 ,  C08F110/02

CPC classification number: C08J11/14 ,  C08F110/02 ,  C08J2323/06

Abstract: Provided is a continuous process for converting waste plastic into recycle for polyethylene polymerization. The process comprises selecting waste plastics containing polyethylene and/or polypropylene and preparing a stable blend of petroleum and the selected plastic. The amount of plastic in the blend comprises no more than 20 wt. % of the blend. The blend is passed to a refinery FCC unit. A liquid petroleum gas LPG olefin/paraffin mixture and naphtha are recovered from the FCC unit and passed to a steam cracker to make ethylene.

公开(公告)号：US20240392096A1

公开(公告)日：2024-11-28

申请号：US18671065

申请日：2024-05-22

Applicant: Chevron U.S.A. Inc.

Inventor： Joel Edward SCHMIDT ,  Richard L. GROVE ,  Robert MONTGOMERY ,  Tengfei LIU ,  Hye-Kyung Cho TIMKEN

IPC: C08J11/18

Abstract: Provided is a stable blend of a petroleum atmospheric tower bottoms (ATBs) feedstock and 1-20 wt. % of plastic, based on the weight of the blend, with the plastic comprising polyethylene and/or polypropylene, and the plastic in the blend comprising finely dispersed microcrystalline particles having an average particle size of 10 micron to less than 100 microns. A process for preparing a stable blend of plastic and petroleum is provided, comprising mixing together a petroleum feed and a plastic comprising polyethylene and/or polypropylene and heating the mixture above the melting point of the plastic, but less than 500° F. Then cooling the plastic melt and petroleum feedstock liquid blend with mixing to a temperature below the melting point of the plastic.

公开(公告)号：US20230312437A1

公开(公告)日：2023-10-05

申请号：US18128336

申请日：2023-03-30

Applicant: Chevron U.S.A. Inc.

Inventor： Joel E. SCHMIDT ,  Hye-Kyung C. TIMKEN ,  Tengfei LIU ,  Richard L. GROVE ,  Kaidong CHEN

IPC: C07C4/22 ,  C10G1/00 ,  C08J11/12

CPC classification number: C07C4/22 ,  C10G1/002 ,  C08J11/12 ,  C10G2300/1003 ,  C10G2300/305 ,  C10G2300/205 ,  C10G2400/02 ,  C10G2400/04 ,  C10G2400/06 ,  C10G2400/08 ,  C08J2323/12 ,  C10G2300/202 ,  C10G2300/308 ,  C10G2300/301

Abstract: Provided is a continuous process for converting waste plastic into recycle for polypropylene polymerization. The process comprises selecting waste plastics containing polyethylene and/or polypropylene and preparing a stable blend of petroleum and the selected plastic. The amount of plastic in the blend comprises no more than 20 wt. % of the blend. The blend is passed to a refinery FCC unit. A liquid petroleum gas C3 olefin/paraffin mixture is recovered from the FCC unit. The C3 paraffins and C3 olefins are separated into different fractions with the C3 olefin fraction passed to a propylene polymerization reactor, and the C3 paraffin fraction passed optionally to a dehydrogenation unit to produce additional propylene.