230 patents
Page 9 of 12
Utility
Multi-reactor Slurry Polymerization Process
6 May 21
A slurry polymerization process for the preparation of polyethylene in a reactor cascade of two or more polymerization reactors wherein monomers are polymerized in the polymerization reactors which include a reactor outlet arranged in each reactor bottom for feeding a reactor slurry to a subsequent polymerization reactor and for emptying the polymerization reactor.
Peter Rohrbach, Juergen Perzlmeier
Filed: 2 Jan 18
Utility
BUTENE-1 Polymer Composition Having High Melt Flow Rate
6 May 21
ROBERTA MARCHINI, STEFANO SPATARO, ROBERTA PICA
Filed: 3 Aug 18
Utility
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6 May 21
ROBERTA MARCHINI, STEFANO SPATARO, ROBERTA PICA
Filed: 3 Aug 18
Utility
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8 Apr 21
A process for preparing an olefin polymer, including the steps of forming a particulate olefin polymer in a gas-phase polymerization reactor in the presence of a C3-C5 alkane as polymerization diluent, separating discharged polyolefin particles from concomitantly discharged gas at a pressure from 1 to 2.2 MPa, degassing the polyolefin particles at a pressure from 0.1 to 0.4 MPa with a gas made from or containing a C3-C5 alkane; and transferring the separated gas and the gas from the degassing to a work-up unit operated at a pressure from 0.001 to 0.2 MPa below the pressure of the separation, wherein the gas for degassing is continuously received from the work-up unit.
Gabriele Mei, Giulia Mei, Giuseppe Penzo
Filed: 2 Aug 18
Utility
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6 Apr 21
A process for preparing an ethylene polymer including the step of homopolymerizing ethylene or copolymerizing ethylene with one or more comonomers in a gas-phase polymerization reactor including a riser unit wherein growing polymer particles flow upwards under fluidization, fast fluidization or transport conditions and a downcomer wherein growing polymer particles flow downward in a densified form, wherein the hold-up of polymer particles in the downcomer is from 55 wt. % to 80 wt. % of the total hold-up of polymer particles in the gas-phase polymerization reactor.
Gerhardus Meier, Ulf Schueller, Gabriele Mei, Massimo Covezzi, Pietro Baita, Lorella Marturano
Filed: 9 Nov 17
Utility
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6 Apr 21
Process for preparing an olefin polymer including the step of polymerizing an olefin in the presence of a polymerization catalyst and hydrogen as molecular weight regulator in a gas-phase polymerization reactor to yield growing polymer particles, the reactor including three or more polymerization zones and at least two thereof are sub-zones of a polymerization unit wherein the growing polymer particles flow downward in a densified form and at least one polymerization zone has a ratio of hydrogen to the sum of olefins which is a factor of at least 1.5 lower than the ratio of hydrogen to the sum of olefins in the polymerization zone having the highest ratio of hydrogen to the sum of olefins and a factor of at least 1.5 higher than the ratio of hydrogen to the sum of olefins in the polymerization zone having the lowest ratio of hydrogen to the sum of olefins.
Gerhardus Meier, Ulf Schueller
Filed: 9 Nov 17
Utility
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25 Mar 21
A catalyst mixture made from or containing (a) particles of a solid catalyst component comprising Ti, Mg, Cl, and (b) from 0.5 to 5.0% by weight, based upon the total weight of the mixture, of particles of a solid compound having particle size ranging from 0.1 μm to 1 mm containing more than 50% by weight of SiO2 units.
DIEGO BRITA, SIMONA GUIDOTTI
Filed: 9 May 18
Utility
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11 Mar 21
A method of depolymerizing plastics using a halloysite catalyst is described herein.
Diego Brita, Sheri E. Davis, Volker Fraaije, Simona Guidotti, Dario Liguori, Sandor Nagy, David L. Ramage, Shahram Mihan, Christopher D. Smith, Daniel F. White, Xueyong Yang
Filed: 9 Sep 20
Utility
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11 Mar 21
Methods of depolymerizing polyolefin-based material into useful petrochemical products using metal oxides and heat are described.
Diego Brita, Sheri E. Davis, Yulenty Deal, Simona Guidotti, Dario Liguori, Sandor Nagy, Christopher D. Smith, Daniel F. White, Xueyong Yang
Filed: 9 Sep 20
Utility
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11 Mar 21
CINDY FLENNIKEN, CHUN D. LEE, CLAUDIO CAVALIERI, MONICA GALVAN, VINCENT BAUDIER, GISELLA BIONDINI
Filed: 21 Jan 19
Utility
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4 Mar 21
A method of depolymerizing plastics using a fluorinated alumina catalyst is described herein.
Sandor Nagy, Christopher D. Smith, Xueyong Yang, Daniel F. White, Sheri E. Davis, Shahram Mihan, Volker Fraaije
Filed: 25 Aug 20
Utility
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16 Feb 21
Diana Doetsch, Bernd Lothar Marczinke, Gerhardus Meier, Ulf Schueller, Elke Damm, Claudio Fibla
Filed: 30 Oct 17
Utility
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26 Jan 21
A process for continuously preparing a polyolefin composition made from or containing a bimodal or multimodal polyolefin and one or more additives in an extruder device equipped with at least one hopper.
Peter Kruempel, Elke Damm, Reinhard Kuehl, Phil Pyman
Filed: 10 Jul 19
Utility
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21 Jan 21
TAKESHI TSUKAHARA, NOBUYUKI TSURUMI, SHITOSHI KANNO, KUNIO YAMAMOTO, TAKESHI NAKAJIMA
Filed: 15 Mar 19
Utility
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19 Jan 21
Paola Massari, Fabrizio Piemontesi, Gianni Vitale, Caroline Cathelin, Giampiero Morini, Claudio Cavalieri, Marco Ciarafoni, Roberto Pantaleoni
Filed: 19 Jul 16
Utility
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19 Jan 21
Roberta Marchini, Stefano Spataro, Emanuele Burgin, Roberta Pica
Filed: 3 Jul 17
Utility
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4 Jan 21
Gianni Perdomi, Monica Galvan, Claudio Cavalieri
Filed: 2 May 18
Utility
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30 Dec 20
TAKASHI TSUKAHARA, NOBUYUKI TSURUMI, SHITOSHI KANNO, KUNIO YAMAMOTO, TAKESHI NAKAJIMA
Filed: 14 Mar 19
Utility
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28 Dec 20
A propylene, ethylene, 1-butene terpolymer made from or containing a) from about 1.8 wt % to about 5.9 wt % of ethylene derived units; and b) from about 2.0 wt % to about 4.5 wt % of 1 butene derived units; and having i) a ratio of C2 wt %/C4 wt % in the range from about 0.9 to about 1.3; wherein C2 wt % is the weight percent of ethylene derived units and C4 wt % is the weight percent of 1-butene derived units; ii) a Melt flow rate (determined according to ISO 1133 230° C., 2.16 kg) in the range from about 1.0 to about 30.0 g/10 min; and iii) a xylene soluble fraction at 25° C. between about 10 wt % and about 30 wt %.
Roberta Marzolla, Paola Massari, Nicoletta Martini, Marco Ciarafoni, Tiziana Caputo
Filed: 13 Mar 16
Utility
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23 Dec 20
An apparatus and a method to withdraw samples from a polymerization plant using a defined sequence of steps combined with locking devices for valves opened by a single key.
Pier Luigi DI FEDERICO, Martin Andries DE ZEEUW
Filed: 3 Jan 19