Methods and systems are provided for the conversion of waste plastics into various useful downstream recycle-content products. More particularly, the present system and method involves integrating a pyrolysis facility with a cracker facility by introducing at least a stream of r-pyrolysis gas into the cracker facility. In the cracker facility, the r-pyrolysis gas may be separated to form one or more recycle content products, and can enhance the operation of the facility.

A method of producing useful fuel fluids from solid plastic waste, including loading solid plastic waste matter into a reaction chamber to define a load, subjecting the load to HTP to extract hydrocarbon mixtures, filtering the hydrocarbon mixtures to extract solid matter, and separating the hydrocarbon mixtures into a light fraction (C.sub.1 to C.sub.25) and a heavy fraction (C.sub.26 to C.sub.31). The heavy fraction is directed to a first container and the light fraction is directed to a second container. The light fraction is separated into diesel (C.sub.8-C.sub.25), gasoline (C.sub.4-C.sub.12), and vapor (C.sub.1-C.sub.5), and the diesel is directed to a third container, the gasoline is directed to a fourth container, and the vapor is directed to a fifth container. The hydrocarbon mixtures have a carbon number distribution between C.sub.1 and C.sub.31. The pressure in the reaction chamber is typically between 0.1 and 10 MPa and the temperature in the reaction chamber is between 350 and 500 degrees Celsius. The plastic waste is selected from the group consisting of PS, PE, PP, and mixtures thereof.

A method of producing useful fuel fluids from solid plastic waste, including loading solid plastic waste matter into a reaction chamber to define a load, subjecting the load to HTP to extract hydrocarbon mixtures, filtering the hydrocarbon mixtures to extract solid matter, and separating the hydrocarbon mixtures into a light fraction (C.sub.1 to C.sub.25) and a heavy fraction (C.sub.26 to C.sub.31). The heavy fraction is directed to a first container and the light fraction is directed to a second container. The light fraction is separated into diesel (C.sub.8-C.sub.25), gasoline (C.sub.4-C.sub.12), and vapor (C.sub.1-C.sub.5), and the diesel is directed to a third container, the gasoline is directed to a fourth container, and the vapor is directed to a fifth container. The hydrocarbon mixtures have a carbon number distribution between C.sub.1 and C.sub.31. The pressure in the reaction chamber is typically between 0.1 and 10 MPa and the temperature in the reaction chamber is between 350 and 500 degrees Celsius. The plastic waste is selected from the group consisting of PS, PE, PP, and mixtures thereof.

The present invention provides a method of upgrading mixed waste plastic pyrolysis oil comprising the steps of providing a pyrolysis oil stream derived from mixed waste plastic, subjecting the pyrolysis oil stream to fractional condensation to obtain three pyrolysis oil fractions, determining properties of the pyrolysis oil fractions, determining an adjusted proportion of the pyrolysis oil fractions to be fed to a hydro-upgrading section for obtaining a product with a predetermined product specification, feeding the pyrolysis oil fractions in the adjusted proportion to a pyrolysis oil hydro-upgrading section to perform a hydro-upgrading operation, adjusting one or more control parameters of the pyrolysis oil hydro-upgrading section according to the adjusted proportion of the pyrolysis oil fractions and the predetermined product specification; and separating an hydro-upgrading section outlet stream to obtain a product stream with the predetermined product specification. In this way, the upgrading of the pyrolysis oil can be tailored and adapted to the great variability of properties of pyrolysis oil derived from mixed plastic waste pyrolysis in order to obtain a uniform commercial-grade fuel that can achieve a premium market value. The process may comprise in-situ hydrogen generation by water electrolysis powered by solar photovoltaic energy.