Circular economy for plastic waste to polyethylene and lubricating oil via crude and isomerization dewaxing units

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11739272
APP PUB NO 20230048572A1
SERIAL NO

17964754

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Abstract

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Provided is a continuous process for converting waste plastic into recycle for polyethylene polymerization. In one embodiment, the process comprises selecting waste plastics containing polyethylene and/or polypropylene and passing the waste plastics through a pyrolysis reactor to thermally crack at least a portion of the polyolefin waste and produce a pyrolyzed effluent. The pyrolyzed effluent is separated into offgas, a naphtha/diesel fraction, a heavy fraction, and char. The naphtha/diesel fraction is passed to a crude unit distillation column in a refinery where a straight run naphtha (C5-C8) fraction or a propane/butane (C3-C4) fraction is recovered. The straight run naphtha fraction (C5-C8) or the propane/butane (C3-C4) fraction is passed to a steam cracker for ethylene production. The heavy fraction from the pyrolysis unit can also be passed to an isomerization dewaxing unit to produce a base oil.

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Patent Owner(s)

Patent OwnerAddress
CHEVRON U S A INCSAN RAMON CALIFORNIA 94583-0806

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Timken, Hye-Kyung Albany, US 44 536

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