[미국특허]
Use of hydrogen and an organozinc compound for polymerization and polymer property control
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08F-004/00
C08F-004/06
C08F-004/12
C08F-002/00
C08F-210/00
C08F-210/16
C08F-010/00
C08F-110/02
출원번호
US-0927165
(2013-06-26)
등록번호
US-8829125
(2014-09-09)
발명자
/ 주소
Ding, Errun
Yang, Qing
Masino, Albert P.
Yu, Youlu
Guatney, Lloyd W.
Askew, Jim B.
출원인 / 주소
Chevron Phillips Chemical Company LP
대리인 / 주소
Merchant & Gould P.C.
인용정보
피인용 횟수 :
0인용 특허 :
119
초록
Methods of controlling polymerization reactions using a synergistic amount of hydrogen and an organozinc compound are disclosed. The resulting polymers have lower molecular weights and higher melt flow indices.
대표청구항▼
1. A method of controlling a polymerization reaction in a polymerization reactor system, the method comprising: (i) introducing a transition metal-based catalyst composition, ethylene, and an olefin comonomer into a polymerization reactor within the polymerization reactor system, wherein the transit
1. A method of controlling a polymerization reaction in a polymerization reactor system, the method comprising: (i) introducing a transition metal-based catalyst composition, ethylene, and an olefin comonomer into a polymerization reactor within the polymerization reactor system, wherein the transition metal-based catalyst composition comprises (a) a transition metal compound comprising chromium; (b) an activator-support comprising a solid oxide treated with an electron-withdrawing anion; and (c) a co-catalyst comprising an organoaluminum compound;(ii) contacting the transition metal-based catalyst composition with ethylene and the olefin comonomer under polymerization conditions to produce an ethylene polymer; and(iii) introducing a synergistic amount of hydrogen and an organozinc compound into the polymerization reactor system to increase a melt index (MI) of the ethylene polymer to within a range from about 1 to about 20 g/10 min; wherein: the organozinc compound comprises diethylzinc;the olefin comonomer comprises 1-butene, 1-hexene, 1-octene, or a mixture thereof; andthe polymerization reactor system comprises a slurry reactor, a gas-phase reactor, a solution reactor, or a combination thereof. 2. The method of claim 1, wherein: the synergistic amount of hydrogen and the organozinc compound comprises a hydrogen:organozinc compound molar ratio in a range from about 500:1 to about 7,500:1; andhydrogen is added to the polymerization reactor system at a hydrogen:ethylene molar ratio in a range from about 0.01:1 to about 0.2:1. 3. The method of claim 2, wherein the MI of the ethylene polymer is increased to within a range from about 1 to about 10 g/10 min. 4. An olefin polymerization process, the process comprising: contacting a transition metal-based catalyst composition with ethylene and an olefin comonomer under polymerization conditions, and in the presence of a synergistic amount of hydrogen and an organozinc compound, to produce an ethylene polymer; wherein the transition metal-based catalyst composition comprises (a) a transition metal compound; (b) an activator-support comprising a solid oxide treated with an electron-withdrawing anion; and (c) an organoaluminum co-catalyst; and wherein:the olefin comonomer comprises 1-butene, 1-hexene, 1-octene, or a mixture thereof;the synergistic amount of hydrogen and the organozinc compound comprises a hydrogen:organozinc compound molar ratio in a range from about 500:1 to about 7,500:1; anda Mw of the ethylene polymer is in a range from about 50,000 to about 250,000 g/mol and/or a MI of the ethylene polymer is greater than about 1 g/10 min. 5. The process of claim 4, wherein: the organozinc compound comprises diethylzinc;the activator-support comprises fluorided alumina, chlorided alumina, bromided alumina, sulfated alumina, fluorided silica-alumina, chlorided silica-alumina, bromided silica-alumina, sulfated silica-alumina, fluorided silica-zirconia, chlorided silica-zirconia, bromided silica-zirconia, sulfated silica-zirconia, fluorided silica-titania, fluorided silica-coated alumina, sulfated silica-coated alumina, phosphated silica-coated alumina, or any combination thereof; andthe organoaluminum co-catalyst comprises trimethylaluminum, triethylaluminum, tri-n-propylaluminum, tri-n-butylaluminum, triisobutylaluminum, tri-n-hexylaluminum, tri-n-octylaluminum, diisobutylaluminum hydride, diethylaluminum ethoxide, diethylaluminum chloride, or any combination thereof. 6. The process of claim 5, wherein: the transition metal compound comprises chromium;the Mw of the ethylene polymer is within a range from about 60,000 to about 180,000 g/mol; andthe MI of the ethylene polymer is within a range from about 1.5 to about 20 g/10 min. 7. A method of controlling a polymerization reaction in a polymerization reactor system, the method comprising: (i) introducing a transition metal-based catalyst composition, an olefin monomer, and optionally an olefin comonomer into a polymerization reactor within the polymerization reactor system, wherein the transition metal-based catalyst composition comprises (a) a transition metal compound; (b) an activator; and (c) optionally, a co-catalyst;(ii) contacting the transition metal-based catalyst composition with the olefin monomer and the optional olefin comonomer under polymerization conditions to produce an olefin polymer; and(iii) introducing a synergistic amount of hydrogen and an organozinc compound into the polymerization reactor system to reduce a weight-average molecular weight (Mw) and/or to increase a melt index (MI) of the olefin polymer; wherein: the activator comprises an aluminoxane compound, an organoboron or organoborate compound, an ionizing ionic compound, or any combination thereof;the synergistic amount of hydrogen and the organozinc compound comprises a hydrogen:organozinc compound molar ratio in a range from about 100:1 to about 25,000:1; anda Mn of the olefin polymer is substantially unchanged and/or a ratio of Mw/Mn of the olefin polymer is reduced by at least 75%. 8. The method of claim 7, wherein the transition metal compound has the formula: Cr(XA)(X1)(X2)(L)n; wherein:XA is a substituted or unsubstituted cyclopentadienyl, indenyl, or fluorenyl group;X1 and X2 independently are a monoanionic ligand; andL is a neutral ligand, wherein n is 0, 1, or 2. 9. The method of claim 8, wherein: XA is a substituted cyclopentadienyl group;X1 and X2 independently are hydrogen, a halide, a C1 to C36 hydrocarbyl group, a C1 to C36 hydrocarbyloxy group, a C1 to C36 hydrocarbylaminyl group, a C1 to C36 hydrocarbylsilyl group, a C1 to C36 hydrocarbylaminylsilyl group, OBRA2, or OSO2RA, wherein RA is a C1 to C36 hydrocarbyl group; andL is an ether, a thioether, an amine, a nitrile, or a phosphine. 10. The method of claim 7, wherein: the catalyst composition is contacted with ethylene and an olefin comonomer comprising 1-butene, 1-hexene, 1-octene, or a mixture thereof; andthe catalyst composition comprises an organoaluminum co-catalyst. 11. The method of claim 10, wherein: the activator comprises an aluminoxane compound; andthe organozinc compound comprises diethylzinc. 12. The method of claim 11, wherein the polymerization reactor system comprises a slurry reactor, a gas-phase reactor, a solution reactor, or a combination thereof. 13. The method of claim 7, wherein: the synergistic amount of hydrogen and the organozinc compound comprises a hydrogen:organozinc compound molar ratio in a range from about 500:1 to about 7,500:1;hydrogen is added to the polymerization reactor system at a hydrogen:olefin monomer molar ratio in a range from about 0.01:1 to about 0.2:1; andthe MI of the olefin polymer is increased to within a range from about 1 to about 10 g/10 min. 14. The method of claim 13, wherein: the organozinc compound comprises diethylzinc; andthe catalyst composition is contacted with ethylene and an olefin comonomer comprising 1-butene, 1-hexene, 1-octene, or a mixture thereof. 15. The method of claim 14, wherein: the polymerization reactor system comprises a slurry reactor, a gas-phase reactor, a solution reactor, or a combination thereof; andthe transition metal-based catalyst composition comprises a transition metal compound comprising chromium, an activator comprising an aluminoxane compound, and a co-catalyst comprising an organoaluminum compound. 16. An olefin polymerization process, the process comprising: contacting a transition metal-based catalyst composition with ethylene and an olefin comonomer under polymerization conditions, and in the presence of a synergistic amount of hydrogen and an organozinc compound, to produce an ethylene polymer; wherein the transition metal-based catalyst composition comprises (a) a transition metal compound; (b) an activator comprising an aluminoxane compound, an organoboron or organoborate compound, an ionizing ionic compound, or any combination thereof; and (c) optionally, a co-catalyst; and wherein:the olefin comonomer comprises 1-butene, 1-hexene, 1-octene, or a mixture thereof;a Mw of the ethylene polymer is in a range from about 50,000 to about 250,000 g/mol; anda MI of the ethylene polymer is greater than about 1 g/10 min. 17. The process of claim 16, wherein: a Mn of the ethylene polymer is substantially unchanged; anda ratio of Mw/Mn of the ethylene polymer is reduced by at least 75%. 18. The process of claim 16, wherein: the catalyst composition comprises an organoaluminum co-catalyst;the synergistic amount of hydrogen and the organozinc compound comprises a hydrogen:organozinc compound molar ratio in a range from about 500:1 to about 7,500:1. 19. The process of claim 18, wherein: the organozinc compound comprises diethylzinc;the organoaluminum co-catalyst comprises trimethylaluminum, triethylaluminum, tri-n-propylaluminum, tri-n-butylaluminum, triisobutylaluminum, tri-n-hexylaluminum, tri-n-octylaluminum, diisobutylaluminum hydride, diethylaluminum ethoxide, diethylaluminum chloride, or any combination thereof. 20. The process of claim 16, wherein: the transition metal compound comprises chromium;the Mw of the ethylene polymer is within a range from about 60,000 to about 180,000 g/mol; andthe MI of the ethylene polymer is within a range from about 1.5 to about 20 g/10 min.
McDaniel Max P. (Bartlesville OK) Johnson Marvin M. (Bartlesville OK), Acid gelling aluminum phosphate from concentrated mass and catalyst containing same.
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.
Arriola, Daniel J.; Devore, David D.; Carnahan, Edmund M.; Hustad, Phillip D.; Kuhlman, Roger L.; Wenzel, Timothy T., Catalyst composition comprising shuttling agent for ethylene copolymer formation.
Arriola, Daniel J.; Carnahan, Edmund M.; Cheung, Yunwa Wilson; Devore, David D.; Graf, David D.; Hustad, Phillip D.; Kuhlman, Roger L.; Shan, Colin Li Pi; Poon, Benjamin C.; Roof, Gordon R.; Stevens, James C.; Stirn, Pamela J.; Wenzel, Timothy T., Catalyst composition comprising shuttling agent for ethylene multi-block copolymer formation.
McDaniel Max P. ; Benham Elizabeth A. ; Martin Shirley J. ; Collins Kathy S. ; Smith James L. ; Hawley Gil R. ; Wittner Christopher E. ; Jensen Michael D., Compositions that can produce polymers.
McDaniel Max P. ; Collins Kathy S. ; Johnson Marvin M. ; Smith James L. ; Benham Elizabeth A. ; Hawley Gil R. ; Wittner Christopher E. ; Jensen Michael D., Compositions that can produce polymers.
Frey Krisztina (Bayreuth DEX) von Massow Gabriele (Bayreuth DEX) Alt Helmut G. (Bayreuth DEX) Welch M. Bruce (Bartlesville OK), Cyclopentadienyl-type ligands, metallocenes, catalyst systems, preparation, and use.
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.
McDaniel Max P. (Bartlesville OK) Klendworth Douglas D. (Westchester OH) Johnson Marvin M. (Bartlesville OK), Fluorided aluminas, catalysts, and polymerization processes.
McDaniel Max P. (Bartlesville OK) Klendworth Douglas D. (Westchester OH) Johnson Marvin M. (Bartlesville OK), Fluorided aluminas, catalysts, and polymerization processes.
Hottovy John D. ; Hensley Harvey D. ; Przelomski David J. ; Cymbaluk Teddy H. ; Franklin ; III Robert K. ; Perez Ethelwoldo P., High solids slurry polymerization.
Reed Marion G. (Hacienda Heights CA) Jaffe Joseph (Berkeley CA), Hydrocarbon hydroconversion process employing hydroxy-aluminum stabilized catalysts supports.
McDaniel Max P. (Bartlesville OK) Klendworth Douglas (Bartlesville OK) Norwood Donald D. (Bartlesville OK) Hsieh Eric T. (Bartlesville OK) Boggs Elizabeth A. (Bartlesville OK), In situ comonomer generation in olefin polymerization.
McDaniel Max P. (Bartlesville OK) Klendworth Douglas (Bartlesville OK) Norwood Donald D. (Bartlesville OK) Hsieh Eric T. (Bartlesville OK) Boggs Elizabeth A. (Bartlesville OK), In situ comonomer generation in olefin polymerization.
Geerts Rolf L. (Bartlesville OK) Palackal Syriac J. (Bartlesville OK) Pettijohn Ted M. (Bartlesville OK) Infield Robert M. (Barnsdall OK), Metallocene catalyst systems, preparation, and use.
Welch M. Bruce (Bartlesville OK) Alt Helmut G. (Bayreuth DEX) Peifer Bernd (Bayreuth DEX), Metallocene compounds and preparation thereof containing terminal alkynes.
Alt Helmut G. (Bayreuth DEX) Patsidis Konstantinos (Bayreuth OK DEX) Welch M. Bruce (Bartlesville OK) Geerts Rolf L. (Bartlesville OK) Peifer Bernd (Bayreuth OK DEX) Palackal Syriac J. (Bartlesville , Metallocenes and processes therefor and therewith.
Jenkins ; III John M. (So. Charleston WV) Jones Russell L. (Chapel Hill NC) Jones Thomas M. (So. Charleston WV) Beret Samil (Danville CA), Method for fluidized bed polymerization.
Welch M. Bruce (Bartlesville OK) Alt Helmut G. (Bayreuth DEX) Peifer Bernd (Bayreuth OK DEX) Palackal Syriac J. (Bartlesville OK) Glass Gary L. (Dewey OK) Pettijohn Ted M. (Bartlesville OK) Hawley Gi, Method for making and using a supported metallocene catalyst system.
Zenk Roland (Bayreuth DEX) Alt Helmut G. (Bayreuth OK DEX) Welch M. Bruce (Bartlesville OK) Palackal Syriac J. (Bartlesville OK), Method for preparing cyclopentadienyl-type ligands and metallocene compounds.
Shamshoum Edwar S. ; Rauscher David J., Method of olefin polymerization utilizing hydrogen pulsing, products made therefrom, and method of hydrogenation.
Yang, Qing; McDaniel, Max P.; Ding, Errun; Cymbaluk, Ted H.; Crain, Tony R.; Glass, Gary L., Methods for controlling dual catalyst olefin polymerizations with an organozinc compound.
Mitchell Kent E. (Bartlesville OK) McDaniel Max P. (Bartlesville OK) Welch M. Bruce (Bartlesville OK) Benham Elizabeth A. (Bartlesville OK) Cone Grover W. (Bartlesville OK) ..AP: Phillips Petroleum C, Olefin polymerization.
Stacy Elizabeth M. (Bartlesville OK) Welch M. Bruce (Bartlesville OK) Martin Shirley J. (Bartlesville OK) McDaniel Max P. (Bartlesville OK) Pierce Dale E. (Bartlesville OK), Olefin polymerization.
McDaniels Max P. (Bartlesville OK) Johnson Marvin M. (Bartlesville OK), Olefin polymerization using chromium on an aluminum phosphate produced from a concentrated mass.
Palackal Syriac J. (Bartlesville OK) Alt Helmut G. (Bayreuth DEX) Patsidis Konstantinos (Bayreuth OH DEX) Hill Tara G. (Fairfield OH) Hawley Gil R. (Dewey OK) Chu Peter P. (Bartlesville OK) Welch M. , Olefin polymerization using silyl-bridged metallocenes.
McDaniel, Max P.; Johnson, Marvin M.; Randolph, Bruce B.; Collins, Kathy S.; Benham, Elizabeth A.; Jensen, Michael D.; Martin, Joel L.; Hawley, Gil R., Organometal catalyst composition.
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.
McDaniel, Max P.; Collins, Kathy S.; Benham, Elizabeth A.; Eaton, Anthony P.; Jensen, Michael D.; Martin, Joel L.; Hawley, Gil R.; Hsieh, Eric T., Organometal catalyst compositions.
McDaniel, Max P.; Collins, Kathy S.; Eaton, Anthony P.; Benham, Elizabeth A.; Jensen, Michael D.; Martin, Joel L.; Hawley, Gil R., Organometal catalyst compositions.
McDaniel, Max P.; Shveima, Joseph S.; Smith, James L.; Collins, Kathy S.; Benham, Elizabeth A.; Eaton, Anthony P.; Jensen, Michael D.; Martin, Joel L.; Hawley, Gil R., Organometal catalyst compositions.
McDaniel, Max P.; Collins, Kathy S.; Benham, Elizabeth A.; Eaton, Anthony P.; Jensen, Michael D.; Martin, Joel L.; Hawley, Gil R., Organometal catalyst compositions with solid oxide supports treated with fluorine and boron.
Max P. McDaniel ; Kathy S. Collins ; Anthony P. Eaton ; Elizabeth A. Benham ; Joel L. Martin ; Michael D. Jensen ; Gil R. Hawley, Organometal compound catalyst.
McDaniel, Max P.; Collins, Kathy S.; Hawley, Gil R.; Jensen, Michael D.; Benham, Elizabeth A.; Eaton, Anthony P.; Martin, Joel L.; Wittner, Christopher E., Organometal compound catalyst.
McDaniel, Max P.; Collins, Kathy S.; Hawley, Gil R.; Jensen, Michael D.; Wittner, Christopher E.; Benham, Elizabeth A.; Eaton, Anthony P.; Martin, Joel L.; Rohlfing, David C.; Yu, Youlu, Organometal compound catalyst.
Alt Helmut G. (Bayreuth DEX) Palackal Syriac J. (Bartlesville OK) Zenk Roland (Bayreuth DEX) Welch M. Bruce (Bartlesville OK) Schmid Michael (Bayreuth DEX), Organometallic fluorenyl compounds and use thereof in an alpha-olefin polymerization process.
Alt Helmut G. (Bayreuth DEX) Hawley Gil R. (Dewey OK) Smith Paul D. (Seabrook TX) Palackal Syriac J. (Bartlesville OK) Schmid Michael (Bayreuth DEX) Welch M. Bruce (Bartlesville OK) Patsidis Konstant, Organometallic fluorenyl compounds and use thereof in olefin polymerization.
Alt Helmut G. (Bayreuth DEX) Palackal Syriac J. (Bayreuth DEX) Patsidis Konstantinos (Bayreuth OK DEX) Welch M. Bruce (Bartlesville OK) Geerts Rolf L. (Bartlesville OK) Hsieh Eric T. (Bartlesville OK, Organometallic fluorenyl compounds, preparation, and use.
Hawley, Gil R.; McDaniel, Max P.; Wittner, Christopher E.; Jensen, Michael D.; Martin, Joel L.; Benham, Elizabeth A.; Eaton, Anthony P.; Collins, Kathy S., Polymerization catalysts.
Martin,Joel L.; Thorn,Matthew G.; McDaniel,Max P.; Jensen,Michael D.; Yang,Qing; DesLauriers,Paul J.; Kertok,Mark E., Polymerization catalysts and process for producing bimodal polymers in a single reactor.
McDaniel Max P. (Bartlesville OK) Johnson Marvin M. (Bartlesville OK), Polymerization process using catalysts with acid gelled aluminum phosphate base.
McDaniel, Max P.; Collins, Kathy S.; Smith, James L.; Benham, Elizabeth A.; Johnson, Marvin M.; Eaton, Anthony P.; Jensen, Michael D.; Martin, Joel L.; Hawley, Gil R., Polymerization process utilizing organometal catalyst compositions and the polymer produced thereby.
McDaniel Max P. (Bartlesville OK) Smith Paul D. (Seabrook TX) Norwood Donald D. (Bartlesville OK), Polymerization with surface silicated and fluorided alumina supported chromium.
Hanson Donald O. (Bartlesville OK), Process and apparatus for separating diluents from solid polymers utilizing a two-stage flash and a cyclone separator.
Benham Elizabeth A. (Bartlesville OK) McDaniel Max P. (Bartlesville OK), Process for making bimodal polyolefins using two independent particulate catalysts.
Martin Shirley J. (Bartlesville OK) Benham Elizabeth A. (Bartlesville OK) McDaniel Max P. (Bartlesville OK) Gerhold Bruce W. (Bartlesville OK), Process for olefin polymerization.
Frey Krisztina (Bayreuth DEX) von Massow Gabriele (Bayreuth DEX) Alt Helmut G. (Bayreuth DEX) Welch M. Bruce (Bartlesville OK), Process for preparing cyclopentadienyl-type ligands.
Hasegawa Saiki (Mie-ken JPX) Yasuda Hisami (Mie-ken JPX) Yano Akihiro (Mie-ken JPX), Process for producing a
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Max P. McDaniel ; Anthony P. Eaton ; Elizabeth A. Benham ; Shawn R. Kennedy ; Ashish M. Sukhadia ; Rajendra K. Krishnaswamy ; Kathy S. Collins, Process for producing a polymer composition.
Welch M. Bruce (Bartlesville OK) Geerts Rolf L. (Bartlesville OK) Palackal Syriac J. (Bartlesville OK) Pettijohn Ted M. (Marshall TX), Process for producing broad molecular weight polyolefin.
Yang, Qing; McDaniel, Max P.; Martin, Joel L.; Crain, Tony R.; Muninger, Randy S.; Lanier, Jerry T.; Fodor, Jeff S.; Deslauriers, Paul J.; Tso, Chung C.; Rohlfing, David C., Process for producing broader molecular weight distribution polymers with a reverse comonomer distribution and low levels of long chain branches.
McDaniel, Max P.; Benham, Elizabeth A.; Martin, Shirley J.; Collins, Kathy S.; Smith, James L.; Hawley, Gil R.; Wittner, Christopher E.; Jensen, Michael D., Process for producing polymers.
McDaniel Max P. ; Collins Kathy S. ; Johnson Marvin M. ; Smith James L. ; Benham Elizabeth A. ; Hawley Gil R. ; Wittner Christopher E. ; Jensen Michael D., Process for producing polymers using a composition comprising an organometal compound, a treated solid oxide compound, and an organoaluminum compound.
Alt Helmut G. (Bayreuth DEX) Patsidis Konstantinos (Bayreuth DEX) Welch M. Bruce (Bartlesville OK) Chu Peter P. (Bartlesville OK), Process of polymerizing olefins using diphenylsilyl or dimethyl tin bridged 1-methyl fluorenyl metallocenes.
McDaniel Max P. (Bartlesville OK) Smith Paul D. (Bartlesville OK) Norwood Donald D. (Bartlesville OK), Silicon and fluorine-treated alumina containing a chromium catalyst and method of producing same.
Knudsen Ronald D. (Bartlesville OK) McDaniel Max P. (Bartlesville OK) Boggs Elizabeth A. (Bartlesville OK) Bailey F. Wallace (Bartlesville OK), Twice-aged porous inorganic oxides, catalysts, and polymerization processes.
Alt Helmut G. (Bayreuth DEX) Palackal Syriac J. (Bartlesville OK) Patsidis Konstantinos (Berlin DEX) Welch M. Bruce (Bartlesville OK) Geerts Rolf L. (Bartlesville OK) Hsieh Eric T. (Bartlesville OK) , Unbridged metallocenes of 9-substituted fluorenyl compounds and use thereof.
Ding, Errun; Yang, Qing; Masino, Albert P.; Yu, Youlu; Guatney, Lloyd W.; Askew, Jim B., Use of hydrogen and an organozinc compound for polymerization and polymer property control.
Patsidis Konstantinos (Bayreuth DEX) Peifer Bernd (Bayreuth DEX) Palackal Syriac J. (Bartlesville OK) Alt Helmut G. (Bayreuth DEX) Welch M. Bruce (Bartlesville OK) Geerts Rolf L. (Bartlesville OK) Fa, Vinly-substituted bridged metallocenes.
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