Robust Integrated Process for Conversion of Waste Plastics to Final Petrochemical Products

摘要

A robust integrated process for the conversion of waste plastics to high value products. The robust integrated process allows for operation with a single hydroprocessing reactor which provides simultaneous hydrogenation, dechlorination, and hydrocracking of components of a hydrocarbon stream to specifications which meet steam cracker requirements, with the option to further dechlorinate the treated hydrocarbon stream in a polishing zone.

主权项

1. A process for converting waste plastics to a high value product comprising:
converting the waste plastics to a hydrocarbon stream in a liquid phase, wherein the hydrocarbon stream comprises one or more chloride compounds in a concentration of 5 ppm or more based on a total weight of the hydrocarbon stream; contacting the hydrocarbon stream with a first hydroprocessing catalyst in the presence of hydrogen to yield a first hydrocarbon product comprising C1 to C4 gases and C5+ liquid hydrocarbons; recovering the C5+ liquid hydrocarbons in a treated hydrocarbon stream from the first hydrocarbon product, wherein the treated hydrocarbon stream comprises the one or more chloride compounds in a concentration of 3 to 5 ppm based on a total weight of the treated hydrocarbon stream; dechlorinating the treated hydrocarbon stream to yield a polished hydrocarbon stream comprising one or more chloride compounds in a concentration of less than 3 ppm based on a total weight of the polished hydrocarbon stream; and feeding the treated hydrocarbon stream or polished hydrocarbon stream to a steam cracker to yield the high value product, wherein the treated hydrocarbon stream or polished hydrocarbon stream meets steam cracker feed requirements for chloride content, olefin content, and boiling end point.