Chevron Phillips Chemical Company LP

Anne M Balinsky

Anurag Gupta

Robert R McElvain

John D Stewart

Eric P Weber

Rodney L Porter

Robert R Mcelvain

A process is described for introducing a catalyst into a polymerization zone by detecting one or a combination of (i) a change in a concentration of the catalyst in a catalyst feed stream upstream of the polymerization zone, (ii) a change in a concentration of monomer in the polymerization zone, and (iii) a change in a polymer production rate of the polymerization zone, adjusting a first catalyst flow rate of the catalyst in the catalyst feed stream to a second catalyst flow rate based on the one or a combination of (i), (ii), and (iii), and introducing the catalyst into the polymerization zone downstream of a location in the catalyst feed stream where the step of adjusting is performed. A catalyst injection system for carrying out such a process is also provided.

Polymerization catalyst delivery

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.

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Kingwood, TX, United States of America

Anne M Balinsky