Exxonmobil Chemical Patents Inc.

Saurabh S Maduskar

James Richardson Lattner

Keith Holroyd Kuechler

David T Ferrughelli

Jeevan Sahib Abichandani

Bryan A Patel

Randolph John Smiley

Arun K Sharma

Michael W Weber

Federico Barrai

Xiaoying Bao

Anthony Go

Ramanathan Sundararaman

Sundararajan Uppili

Lawrence R Gros

Melissa D Foster

Philippe Laurent

Russell T Clay

Christian A Diaz Urrutia

Systems and methods are provided for integration of a reactor for polyolefin pyrolysis with the effluent processing train for a steam cracker. The polyolefins can correspond to, for example, polyolefins in plastic waste. Integrating a process for polyolefin pyrolysis with a steam cracker processing train can allow a mixture of polymers to be converted to monomer units while reducing or minimizing costs and/or equipment footprint. This can allow for direct conversion of polyolefins to the light olefin monomers in high yield while significantly lowering capital and energy usage due to integration with a steam cracking process train. The integration can be enabled in part by selecting feeds with appropriate mixtures of various polymer types and/or by limiting the volume of the plastic waste pyrolysis product relative to the volume from the steam cracker(s) in the steam cracking process train. By selecting plastic waste and/or other polyolefin sources with an appropriate mixture of polyolefins as the feedstock, the resulting polyolefin pyrolysis product can be separated in a steam cracking process train to produce separate fractions for various polymer grade small olefin products.

Light olefin recovery from plastic waste pyrolysis

Processes and systems for upgrading a hydrocarbon feed. The process can include feeding a hydrocarbon feed, catalyst particles, and molecular hydrogen (H) into a separation zone. The hydrocarbon feed and Hcan be contacted in the presence of the catalyst particles under hydrotreating conditions in the separation zone that can include contacting under a total pressure of less than 3,500 kilopascals-gauge. The Hcan be fed into the separation zone at a rate of no greater than 270 cubic meters of Hper cubic meter of the hydrocarbon feed, where the volume of Hand hydrocarbon feed are based on a temperature of 25 C and a pressure of 101 kilopascals-absolute. A vapor phase hydrocarbon stream and a liquid phase hydrocarbon stream can be obtained from the separation zone. At least a portion of the vapor phase hydrocarbon stream can be fed into a pyrolysis reaction zone to produce a pyrolysis effluent.

Process and system for upgrading a hydrocarbon feed

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Houston, TX, United States of America

Saurabh S Maduskar