Disclosed are embodiments of a method of regenerating a desiccant in an off-line treater of a polyolefin production process. The method may include a heating phase followed by a cooling phase. The heating phase may involve use of a regenerating gas made from heating a treated a recycle stream of the
Disclosed are embodiments of a method of regenerating a desiccant in an off-line treater of a polyolefin production process. The method may include a heating phase followed by a cooling phase. The heating phase may involve use of a regenerating gas made from heating a treated a recycle stream of the polyolefin production process to regenerate desiccant in an off-line treater. The cooling phase may involve thermosyphoning the regenerating gas, nitrogen, an olefin-free diluent, or combinations thereof in a closed-convection loop of the off-line treater.
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1. A method of regenerating a desiccant in an off-line treater of a polyolefin production process, the method comprising a heating phase followed by a cooling phase, the heating phase comprising: heating a regenerating stream comprising a regenerating medium;regenerating at least a portion of the de
1. A method of regenerating a desiccant in an off-line treater of a polyolefin production process, the method comprising a heating phase followed by a cooling phase, the heating phase comprising: heating a regenerating stream comprising a regenerating medium;regenerating at least a portion of the desiccant in the off-line treater using the regenerating medium to yield a regenerating effluent stream comprising the regenerating medium, water, and an impurity; anddecanting the regenerating effluent stream into a water stream comprising the water and the regenerating stream. 2. The method of claim 1, the heating phase further comprising: separating a portion of the regenerating stream into an impurity stream comprising the impurity and a process recycle stream comprising the regenerating medium. 3. The method of claim 2, wherein the portion of the regenerating stream comprises about 10% of the regenerating stream based on a total flow rate of the regenerating stream. 4. The method of claim 2, wherein the impurity is carbon dioxide. 5. The method of claim 1, the heating phase further comprising: prior to decanting, cooling the regenerating effluent stream. 6. The method of claim 5, wherein the step of cooling in the heating phase comprises: cooling the regenerating effluent stream in a cross exchanger and then in an airfin cooler to a first temperature of about 150° F. (66° C.), wherein the cross exchanger uses the regenerating stream to cool the regenerating effluent stream; andcooling the regenerating effluent stream in a cooling water condenser from the first temperature to a second temperature of about 100° F. (37.8° C.), wherein a pressure of the regenerating effluent stream at the second temperature is about 100 prig (0.69 MPag). 7. The method of claim 1, wherein the step of heating in the heating phase comprises: heating the at least a portion of the regenerating stream in a vaporizer to a first temperature of about 146° F. (63.3° C.);heating the at least a portion of the regenerating stream in a cross exchanger to a second temperature, wherein the cross exchanger uses the regenerating effluent stream to heat the regenerating stream to the second temperature which is within about 20° F. (11.1° C.) of a temperature of the regenerating effluent stream; andheating the at least a portion of the regenerating stream in an electric heater to a third temperature in the range of 400° F. (204° C.) to 600° F. (316° C.). 8. The method of claim 1, wherein the off-line treater reaches a temperature in the range of 400° F. (204° C.) to 600° F. (316° C.) during the heating phase. 9. The method of claim 1, wherein during the heating phase the off-line treater has a temperature of about 150° F. (66° C.) or lower, and wherein during the heating phase a rate of flow of the regenerating medium through the off-line treater is from about 2% to about 75% of a fluidization velocity of the desiccant. 10. The method of claim 1, wherein the step of regenerating in the heating phase comprises: introducing the regenerating medium into the off-line treater; andremoving the impurity from the desiccant of the off-line treater with the regenerating medium. 11. The method of claim 1, wherein the regenerating medium comprises diluent in a liquid phase, diluent in a gaseous phase, or diluent in both a liquid phase and a gaseous phase. 12. The method of claim 11, wherein the diluent is propane, butane, isobutane, pentane, isopentane, hexane, heptane, or combinations thereof. 13. A method of regenerating a desiccant in an off-line treater of a polyolefin production process, the method comprising a heating phase followed by a cooling phase, the cooling phase comprising: cooling a regenerating effluent stream obtained from the off-line treater, wherein the regenerating effluent stream comprises a regenerating medium;recycling a regenerating stream comprising the regenerating medium from a decanter to the offline treater; andcooling the off-line treater to a temperature of about 150° F. (66° C.) with the regenerating medium. 14. The method of claim 13, wherein the decanter is maintained at a temperature of about 100° F. (37.8° C.) and a pressure of about 100 psig (0.69 MPag) during the cooling phase. 15. The method of claim 13, wherein the regenerating stream is not heated during the cooling phase, and wherein the regenerating effluent stream bypasses a crossflow exchanger having the regenerating stream flowing therethrough during the cooling phase. 16. The method of claim 13, wherein after the off-line treater cools to about 150° F. (66° C.), the off-line treater contains the regenerating medium in a liquid phase. 17. The method of claim 16, further comprising a draining phase which follows the cooling phase, wherein the draining phase comprises: stopping a flow of the regenerating stream to the off-line treater; anddraining the regenerating medium from the off-line treater to the decanter. 18. The method of claim 17, wherein a temperature of the regenerating effluent stream is from about 140° F. (60° C.) to about 150° F. (66° C.) during the step of draining in the cooling phase. 19. The method of claim 13, wherein the off-line treater comprises an ethylene treater, a hexene treater, an isobutane treater, an isopentane treater, a pentane treater, or a deethanizer column overhead treater. 20. The method of claim 13, wherein the off-line treater is a hexene treater, the method further comprising a holding phase between the heating phase and the cooling phase, wherein holding phase comprises: maintaining the off-line treater at the temperature in the range of 400° F. (204° C.) to 600° F. (316° C.) using nitrogen on a once-through basis. 21. A method of regenerating a desiccant in an off-line treater of a polyolefin production process, the method comprising a heating phase followed by a cooling phase, the heating phase comprising: heating a regenerating stream comprising a regenerating medium;regenerating at least a portion of the desiccant in the off-line treater using the regenerating medium to yield a regenerating effluent stream comprising the regenerating medium and water; anddecanting in a decanter the regenerating effluent stream into a water stream comprising the water and the regenerating stream comprising the regenerating medium;the cooling phase comprising: cooling the regenerating effluent stream obtained from the off-line treater;recycling the regenerating stream from the decanter to the off-line treater; andcooling the off-line treater with the regenerating medium obtained from the decanter.
Hottovy John D. (Bartlesville OK) Lawrence Frederick C. (Bartlesville OK) Lowe Barry W. (Bartlesville OK) Fangmeier James S. (Bartlesville OK), Apparatus and method for producing ethylene polymer.
Volmer Dieter (Wesseling DEX) Schwind Juergen (Meschenich DEX) Kolk Erich (Bad Duerkheim DEX) Frielingsdorf Hans (Bad Duerkheim DEX), Apparatus for carrying out polymerizations from the gas phase.
Theopold, Klaus H.; Kim, Woo-Kyu; MacAdams, Leonard A.; Power, John M.; Mora, Javier M.; Masino, Albert P., Catalyst compounds with .beta.-diminate anionic ligands and processes for polymerizing olefins.
Yang, Qing; McDaniel, Max P.; Crain, Tony R.; Yu, Youlu; Inn, Yongwoo, Catalyst system with three metallocenes for producing broad molecular weight distribution polymers.
McDaniel, Max P.; Benham, Elizabeth A.; Secora, Steven J.; Jensen, Michael D.; Collins, Kathy S., Catalyst systems comprising a calcined chromium catalyst and a non-transition metal cyclopentadienyl cocatalyst.
Yang, Qing; McDaniel, Max P.; Crain, Tony R.; Yu, Youlu, Catalysts for producing broad molecular weight distribution polyolefins in the absence of added hydrogen.
Jensen,Michael D.; Martin,Joel L.; McDaniel,Max P.; Yang,Qing; Thorn,Matthew G.; Benham,Elizabeth A.; Cymbaluk,Ted H.; Sukhadia,Ashish M.; Krishnaswamy,Rajendra K.; Kertok,Mark E., Dual metallocene catalyst for producing film resins with good machine direction (MD) elmendorf tear strength.
Yang, Qing; Jayaratne, Kumudini C.; Jensen, Michael D.; McDaniel, Max P.; Martin, Joel L.; Thorn, Matthew G.; Lanier, Jerry T.; Crain, Tony R., Dual metallocene catalysts for polymerization of bimodal polymers.
McElvain, Robert R.; Hottovy, John D.; Romig, Ralph W.; Verser, Donald W.; Burns, David H.; Tait, John H.; Peacock, Richard; Hein, James E.; Kufeld, Scott E.; Fenderson, Carl W.; Gupta, Anurag; Zellers, Dale A.; Zellers, legal representative, Penny A., Energy efficient polyolefin process.
Bernier Robert Joseph Noel ; Boysen Robert Lorenz ; Brown Robert Cecil ; Goode Mark Gregory ; Moorhouse John Henry ; Olson Robert Darrell ; Scarola Leonard Sebastian ; Spriggs Thomas Edward ; Wang Du, Gas phase polymerization process.
Martin, Joel L.; Yang, Qing; McDaniel, Max P.; Askew, Jim B., High activity catalyst compositions containing silicon-bridged metallocenes with bulky substituents.
Hottovy John D. ; Hensley Harvey D. ; Przelomski David J. ; Cymbaluk Teddy H. ; Franklin ; III Robert K. ; Perez Ethelwoldo P., High solids slurry polymerization.
Mitchell, Kent E.; Glass, Gary L.; Kirchman, L. Matthew; Provence, Robert K.; Ford, Leigh A.; Muninger, Randall S., Method for making and using a metallocene catalyst system.
Collins, Kathy S.; Palackal, Syriac J.; McDaniel, Max P.; Jensen, Michael D.; Hawley, Gil R.; Farmer, Kenneth R.; Wittner, Christopher E.; Benham, Elizabeth A.; Eaton, Anthony P.; Martin, Joel L., Organometal catalyst compositions.
Max P. McDaniel ; James B. Kimble ; Kathy S. Collins ; Elizabeth A. Benham ; Michael D. Jensen ; Gil R. Hawley ; Joel L. Martin, Organometal catalyst compositions.
Max P. McDaniel ; Kathy S. Collins ; Anthony P. Eaton ; Elizabeth A. Benham ; Michael D. Jensen ; Joel L. Martin ; Gil R. Hawley, Organometal catalyst compositions.
Max P. McDaniel ; Kathy S. Collins ; James L. Smith ; Elizabeth A. Benham ; Marvin M. Johnson ; Anthony P. Eaton ; Michael D. Jensen ; Joel L. Martin ; Gil R. Hawley, Organometal catalyst compositions.
Jensen, Michael D.; McDaniel, Max P.; Benham, Elizabeth A.; Eaton, Anthony P.; Martin, Joel L.; Hawley, Gil R.; Crain, Tony R.; Tanner, Martha J., Polymerization catalyst compositions and processes to produce polymers and bimodal polymers.
Jensen, Michael D.; McDaniel, Max P.; Benham, Elizabeth A.; Eaton, Anthony P.; Martin, Joel L.; Hawley, Gil R.; Crain, Tony R.; Tanner, Martha J., Polymerization catalyst compositions and processes to produce polymers and bimodal polymers.
McDaniel, Max P.; Shveima, Joseph S.; Benham, Elizabeth A.; Geerts, Rolf L.; Smith, James L., Polymerization catalyst systems and processes using alkyl lithium compounds as a cocatalyst.
Yang, Qing; Jensen, Michael D.; Martin, Joel L.; Thorn, Matthew G.; McDaniel, Max P.; Yu, Youlu; Rohlfing, David C., Polymerization catalysts for producing high molecular weight polymers with low levels of long chain branching.
Yang, Qing; McDaniel, Max P.; Martin, Joel L.; Yu, Youlu; Rohlfing, David C.; Jensen, Michael D., Polymerization catalysts for producing polymers with low melt elasticity.
Hanson Donald O. (Bartlesville OK), Process and apparatus for separating diluents from solid polymers utilizing a two-stage flash and a cyclone separator.
Murray, Rex E.; Beaulieu, William B.; Yang, Qing; Ding, Errun; Glass, Gary L.; Solenberger, Alan L.; Secora, Steven J., Use of hydrogen scavenging catalysts to control polymer molecular weight and hydrogen levels in a polymerization reactor.
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