Union Carbide Chemicals & Plastics Technology Corporation

Other

Univation Technologies, LLC

Robert Darrell Olson

Mark Gregory Goode

Leonard Sebastian Scarola

Thomas Edward Spriggs

Duan-Fan Wang

Robert Lorenz Boysen

Gary Harry Williams

John Henry Moorhouse

Robert Cecil Brown

Timothy Joseph Howley

Kevin Joseph Cann

Maria A Apecetche

Mark Williams Blood

Robert J Bernier

Natarajan Muruganandam

Gregory George Smith

Robert Joseph Noel Bernier

John Roberts Parrish

Randall L Force

George W Schwarz, Jr

James Leland Swecker, Ii

Cloid Russell Smith, Iii

Billy Jack Garner

Donald A Fischer

Theodore Duncan

James L Swecker

Ralph Niels Hesson

Thomas Walter Pilgrim

Daniel W Mosser

Jr George W Schwarz

Theodore D Duncan

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

The partially condensed fluid recycle stream of a fluidized bed polyolefin reactor operating in the condensing mode is split into two portions by a stream splitter. In a preferred mode, the smaller stream from the splitter contains a higher ratio of liquid to gas than the larger stream. One portion of the split stream is injected below the fluidized bed and the other, preferably with enhanced liquid content, is injected into the fluidized bed at a level above the product withdrawal level. Regulation of liquid injection above the product withdrawal level, as a function of liquid in the product discharge tanks, reduces the liquid in the product discharge system, resulting in improved discharge cycle times and more efficient conservation of monomer and other materials which might otherwise be lost in the discharge process.

Fluid recycle apparatus for fluidized bed polyolefin reactor

Polyolefin production using condensing mode in fluidized beds, with liquid phase enrichment and bed injection

A process for producing polymer in a gas phase reactor by introducing a stream of monomer and gas into a polymerization zone while providing at least one liquid component in the polymerization zone.

Gas phase polymerization process

The liquid content of granular product removed from a fluidized bed polymerization reactor operating in the condensing mode is reduced or minimized by removing the product from a level in the fluidized bed which is about 0.21 to about 0.59 of its height while venting the product discharge tank to a point higher in the fluidized bed.

Dry product discharge from a gas phase polymerization reactor operating in the condensing mode

The partially condensed fluid recycle stream of a fluidized bed polyolefin reactor operating in the condensing mode is split into two portions by a stream splitter. In a preferred mode, the smaller stream from the splitter contains a higher ratio of liquid to gas than the larger stream. One portion of the split stream is injected below the fluidized bed and the other, preferably with enhanced liquid content, is injected into the fluidized bed at a level above the distributor plate, preferably above the product withdrawal level.

A security cover for a conventional telephone installation backboard, characterized by use of a pair of mounting members rapidly attachable to the backboard, one of which includes a hinged door panel which may be pivoted toward and away from the other mounting member to provide selective access to the backboard. The pair of mounting members are so constructed to permit mounting the backboard without disturbing any existing wiring connections on the backboard and once installed, the hinged door panel may be locked in a close position to prohibit unauthorized access to wiring disposed on the backboard.

Security cover for telephone line installation backboard and method of

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Charleston, WV, United States of America

Robert Darrell Olson