Univation Technologies, LLC

Randall L Force

Mark Williams Blood

Thomas Arthur Maliszewski

Gerardo Corona

Dung P Le

William J Blickley

Robert Aronson

W Scott Hamilton

Donald A Fischer

William K Lutz

Timothy R Lynn

Robert Olds Hagerty

Michael D Awe

Robert Darrell Olson

George W Schwarz, Jr

James Leland Swecker, Ii

Cloid Russell Smith, Iii

David Mason Gaines

Theodore Duncan

Edward Allen Leach

Kevin D Roy

Rachael L Le Geyt

Daniel W Mosser

James L Swecker

Donald Fischer

Mark W Blood

Edward A Leach

Jr George W Schwarz

Theodore D Duncan

Methods for integrating aluminoxane production into catalyst production are disclosed.

Methods of integrating aluminoxane production into catalyst production

Provided are systems and methods for separating a purge gas recovered from a polyethylene product. The method includes recovering a polyethylene product containing one or more volatile hydrocarbons from a polymerization reactor and contacting the polyethylene product with a purge gas to remove at least a portion of the volatile hydrocarbons to produce a polymer product having a reduced concentration of volatile hydrocarbons and a purge gas product enriched in volatile hydrocarbons. The purge gas product is compressed to a pressure of 2,500 kPaa to 10,000 kPaa, and is then cooled and separated into at least a first product, a second product, and a third product. A portion of one or more of the first, second, or third products is then recycled as a purge gas, to the polymerization reactor, or to the purge gas product enriched in volatile hydrocarbons prior to compression, respectively.

Systems and methods for recovering hydrocarbons from a polyolefin purge gas product

A discharge system for removing a solid/gas mixture from a fluidized bed pressure vessel is provided. The system includes a fluidized bed pressure vessel, settling vessels, discharge lines, primary discharge valves, vent lines, primary vent valves, crosstie lines, crosstie valves, and primary exit valves wherein the system is absent a transfer tank, and absent a filter element. The method provides for transferring a solid/gas mixture via a discharge line from the pressure vessel to a settling vessel, wherein gas is separated from the mixture, and the gas is transferred to at least one other settling vessel via a crosstie line. After the solids are transferred out of the settling vessel, the empty vessel then receives gas from other settling vessels in the system.

Discharge system to remove solids from a vessel

Various methods and systems for removing particulates from a cycle gas stream, e.g., in a reactor system, are provided. In certain embodiments, the methods are performed in conjunction with a polymerization reactor system such as a gas-phase reactor system.

Systems and methods for removing entrained particulates from gas streams, and reactor systems

Provided are processes and systems for recovering hydrocarbons in a vent stream from a polymerization process. The methods and systems may include the recovery of an olefin monomer from a polymerization vent gas using ethylene refrigeration to condense and recover the olefin monomers from the vent gas. In some embodiments, the methods and systems may also include compression and condensation of polymerization vent gas, recompression of ethylene refrigerant, and use of an expander compressor turbine device for ethylene refrigeration.

Ethylene expansion for low temperature refrigeration in polyethylene vent recovery

Methods and systems for regenerating a purification bed take advantage of inert gas pressure, such as, for example, supplied by a pipeline. The inert gas () is provided at a first pressure and combined with a recycle composition () from the vessel () containing the material being regenerated. These streams form a regeneration fluid composition () at a second pressure less than the inert gas pressure, which is then routed to the vessel to regenerate the purification bed. A jet compressor () may be used for the combining of the inert gas and recycle streams. The recycled composition allows reduction in inert gas usage, while a portion is flared or otherwise disposed of.

Regeneration of purification beds with a jet compressor in an open loop cycle

A discharge system for removing a solid/gas mixture from a fluidized bed pressure vessel is provided. The discharge system includes a fluidized bed pressure vessel, a settling vessel, a transfer vessel, discharge line, primary discharge valve, and primary exit valve. Also in included is a method to operate the discharge system. The method includes transferring a solid/gas mixture from a fluidized bed pressure vessel to a settling vessel, transferring the solids to a transfer vessel, and then emptying the transfer vessel.

Discharge systems and methods of using the same

Systems and methods for removing a volatile catalyst poison from a liquid hydrocarbon are provided. In one embodiment, a process vent () can be introduced to a vent recovery system () to provide a recycle gas (). A first portion of the recycle gas () and a liquid hydrocarbon () can be introduced to a stripper column () to provide a stripper vent gas () and a degassed liquid hydrocarbon () that can be introduced to a polymerization process.

Integrated hydrocarbons feed stripper and method of using the same

A rotary feeder for feeding a particulate material including: a cylindrical housing comprising a feeder inlet, a first feeder outlet, and a second feeder outlet; a rotor mounted in the cylindrical housing including a plurality of substantially impeller blades defining a plurality of circumferentially spaced pockets alignable with the feeder inlet, first feeder outlet, and second feeder outlet, and adapted to sweep a wall of the cylindrical housing as the rotor rotates in the cylindrical housing; a device for rotating the rotor; and a separating screen in the first feeder outlet to substantially prevent oversize material from exiting through the first feeder outlet, wherein each of the plurality of circumferentially spaced pockets will align with the feeder inlet to receive therein a particulate material and an oversize material through the feeder inlet, rotate in the cylindrical housing to align with the first feeder outlet and discharge the particulate material therefrom, and rotate in the cylindrical housing to align with the second feeder outlet after alignment with the first feeder outlet and discharge the oversized material therefrom is provided as well as a method of using the same.

Separator rotary feeder and method of using the same

Growing community of inventors

Charleston, WV, United States of America

Randall L Force