Chevron Phillips Chemical Company LP

Chevrontexaco Corporation

Rodney L Porter

Eric P Weber

Anne M Balinsky

Dennis John O'Rear

Cong-Yan Chen

Processes are provided to produce a dilute ethylene stream and a dilute propylene stream from a cracked gas stream. One process comprises separating the cracked gas stream to produce a C stream and a C stream; hydrogenating the C stream in a hydrogenation zone to remove a portion of the acetylene to produce the dilute ethylene stream and routing the C stream to storage or other process unit. Another process comprises separating a cracked gas stream in a depropanizer zone to form a C stream and a C stream; separating the C stream in a deethanizer zone to form a C and a C stream; hydrogenating a portion of the acetylene in the C stream in a hydrogenation zone to produce a dilute ethylene stream; and routing the C stream to storage or other process unit.

Process to produce a dilute ethylene stream and a dilute propylene stream

A process is provided to produce a dilute ethylene stream and a dilute propylene stream to be used as feedstocks for producing olefin-based derivatives. Specifically, the dilute ethylene stream is used as a feedstock to produce ethylbenzene, and the dilute propylene stream is used as a feedstock to produce cumene, acrylic acid, propylene oxide and other propylene based derivatives.

A process for preparing an ethylene-rich composition from a C paraffinic feedstock is described. The C paraffinic feedstock is subjected to molecular redistribution via dehydrogenation to form olefins, metathesis of the olefins, and rehydrogenation of the olefins to form paraffins. The product stream includes ethane, which is isolated and sent to an ethane or ethane/propane cracker (or, alternatively, a flexi-cracker, although this is less cost effective) to yield an ethylene-rich composition. The product stream also includes C paraffins, which can be recycled, and C &plus;paraffins, which can be used, for example, as solvents. Alternatively, they can be isomerized to form gasoline additives, or can be converted to aromatic compounds by subjecting them to reforming conditions, for example using the AROMAX&trade; process or platforming or rheniforming conditions.

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Pearland, TX, United States of America

Rodney L Porter