Patents by Inventor Daniel Siraux
Daniel Siraux has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20130123441Abstract: The present invention relates to a process of preparing a polyolefin in a loop reactor by introducing anti-fouling agent through a sleeve provided around at least part of the shaft of the pump. Also, the invention relates to the use of anti-fouling agent to prevent or reduce fouling by feeding the anti-fouling agent against the impeller of the pump upon introduction to the loop reactor.Type: ApplicationFiled: July 29, 2011Publication date: May 16, 2013Applicant: TOTAL RESEARCH & TECHNOLOGY FELUYInventors: Daniel Siraux, Aurélien Vantomme, Eric Damme, Daan Dewachter
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Publication number: 20130123443Abstract: The present invention relates to a process of preparing a polyethylene in a loop reactor in the presence of antifouling agent comprising the steps of: a) feeding into said loop reactor diluent, monomers, optionally hydrogen, and optionally one or more co-monomers to produce a liquid phase; b) introducing antifouling agent into said loop reactor, c) introducing a catalyst into the liquid phase to produce a slurry; and d) polymerizing the monomers and optional co-monomers to form the polyethylene, characterized in that the time difference between introduction of the antifouling agent and introduction of the catalyst is at most 3 hours.Type: ApplicationFiled: July 29, 2011Publication date: May 16, 2013Applicant: TOTAL RESEARCH & TCCHNOLOGY FELUYInventors: Daniel Siraux, Daan Dewachter
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Publication number: 20130030132Abstract: The invention relates to a process for preparing polyolefin in a loop reactor. The polymer is prepared by polymerizing olefin monomers in the presence of a catalyst to produce a polyolefin slurry while pumping said slurry through said loop reactor by means of a pump. The present process is characterized in that the catalyst is fed in the loop reactor at a distance to the pump. The invention allows production of the polymer with advantageous properties while leading to fewer blockages of the reactor.Type: ApplicationFiled: February 3, 2011Publication date: January 31, 2013Applicant: TOTAL PETROCHEMICALS RESEARCH FELUYInventors: Eric Damme, Louis Fouarge, Jerôme Bette, Alvaro Fernandez, Aurélien Vantomme, Renaud Oreins, Daniel Siraux
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Patent number: 8344077Abstract: This invention is related to the field of olefin polymerisation in double loop reactors and especially to the polymerisation of olefins with very active catalyst systems. It discloses a method for reducing blockage when transferring polymer product from the first loop to the second loop of a double loop reactor.Type: GrantFiled: November 4, 2008Date of Patent: January 1, 2013Assignee: Total Petrochemicals Research FeluyInventors: Daan Dewachter, Daniel Siraux, André Lewalle
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Publication number: 20120264892Abstract: The present invention relates to a method for initiating an ethylene polymerization reaction in an ethylene polymerization loop reactor. More particularly, the invention relates to the timing upon which hydrogen is introduced into the ethylene polymerization loop reactor. The catalysts used in the ethylene polymerization reaction according to present invention are preferably metallocene catalysts.Type: ApplicationFiled: December 17, 2010Publication date: October 18, 2012Applicant: TOTAL PETROCHEMICALS RESEARCH FELUYInventor: Daniel Siraux
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Publication number: 20120053304Abstract: A method for the copolymerization of ethylene and a C3+ olefin copolymer in a loop reactor system and polymers formed therefrom are described herein.Type: ApplicationFiled: August 24, 2010Publication date: March 1, 2012Applicant: ATOFINA Research S.A.Inventors: Louis Fouarge, Eric Damme, Olivier Miserque, Daniel Siraux, Philippe Bodart, André Lewalle, Marc Van der Auwera, Frans Van den Brande, Giacomo Conti, Hugo Vandaele, Mark Verleysen, Carl Van Camp, Etienne Laurent, Philippe Marechal, Marc Moers, Leopold D'Hooghe, Marjan Sillis, Kai Hortman, Pascal Folie, Renaud Oreins
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Patent number: 8106136Abstract: A method for ethylene slurry polymerisations in a loop reactor in the presence of ethylene monomer, diluent and catalyst and optionally co-monomer and hydrogen, wherein the polymerisation temperature is maintained below the swelling temperature, characterised in that the swelling temperature is calculated as a function of co-monomer concentration and the number average molecular weight of the polyethylene end-product.Type: GrantFiled: November 5, 2008Date of Patent: January 31, 2012Assignee: Total Petrochemicals Research FeluyInventor: Daniel Siraux
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Patent number: 7904271Abstract: The present invention relates to a method for determining activity of a catalyst in a polymerization process, said polymerization process comprising the steps of feeding a catalyst and a diluent into a storage vessel, to form a concentrated settled catalyst, feeding said concentrated settled catalyst into a mixing vessel equipped with mixing means and feeding hydrocarbon diluent into said mixing vessel, to form a diluted catalyst slurry, feeding said diluted catalyst slurry into a polymerization reactor via a volumetric pump, and feeding at least one monomer into said polymerization reactor to form a polymer.Type: GrantFiled: March 6, 2007Date of Patent: March 8, 2011Assignee: Total Petrochemicals Research FeluyInventors: Daniel Siraux, Alain Brusselle
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Publication number: 20110021724Abstract: A method for ethylene slurry polymerisations in a loop reactor in the presence of ethylene monomer, diluent and catalyst and optionally co-monomer and hydrogen, wherein the polymerisation temperature is maintained below the swelling temperature, characterised in that the swelling temperature is calculated as a function of co-monomer concentration and the number average molecular weight of the polyethylene end-product.Type: ApplicationFiled: November 5, 2008Publication date: January 27, 2011Inventor: Daniel Siraux
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Publication number: 20100331500Abstract: This invention is related to the field of olefin polymerisation in double loop reactors and especially to the polymerisation of olefins with very active catalyst systems. It discloses a method for reducing blockage when transferring polymer product from the first loop to the second loop of a double loop reactor.Type: ApplicationFiled: November 4, 2008Publication date: December 30, 2010Applicant: Total Petrochemicals Research FeluyInventors: Daan Dewachter, Daniel Siraux, Andre Lewalle
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Patent number: 7847042Abstract: The invention discloses a metallocene catalysed slurry polymerisation process of ethylene in the presence of a low concentration of scavenger. This allows improving the anti-sheeting of the reactor during the polymerisation process.Type: GrantFiled: March 29, 2007Date of Patent: December 7, 2010Assignee: Total Petrochemicals Research FeluyInventors: Olivier Miserque, Martine Slawinski, Daniel Siraux, Alain Brusselle
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Patent number: 7696287Abstract: The present invention discloses an olefin polymerisation process carried out in the presence of a Ziegler-Natta catalyst in two liquid full loop reactors connected in series wherein different molecular weight fractions are produced to form a polyolefin, said process being characterized in that the Ziegler-Natta catalyst has a particle size distribution d50 of less than 20 ?m and greater that 5 ?m.Type: GrantFiled: February 8, 2005Date of Patent: April 13, 2010Assignee: Total Petrochemicals Research FeluyInventors: Daniel Siraux, Etienne Laurent
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Publication number: 20090326169Abstract: The present invention relates to a process for the preparation of ethylene polymers using a number of reactors arranged in series comprising the steps in which a) ethylene, a diluent, a catalyst, a co-catalyst and optionally comonomers and hydrogen are introduced into a first reactor, b) polymerization of ethylene and optionally comonomers is carried out in the reaction mixture of said first reactor to make ethylene polymers, c) reaction mixture is discharged from said first reactor, d) said reaction mixture and fresh ethylene and optionally comonomers and hydrogen are introduced into the consecutive reactor to make additional ethylene polymers, e) said reaction mixture is discharged from said consecutive reactor and introduced into the further consecutive reactor, if any, with fresh ethylene and optionally comonomers and hydrogen to make additional ethylene polymers, steps c) and d) are repeated until the last reactor of the series, f) reaction mixture is discharged from last reactor of the series and ethylType: ApplicationFiled: March 29, 2007Publication date: December 31, 2009Inventors: Mieke Dams, Daniel Siraux
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Publication number: 20090318637Abstract: The present invention relates to a method for determining activity of a catalyst in a polymerisation process, said polymerisation process comprising the steps of feeding a catalyst and a diluent into a storage vessel, to form a concentrated settled catalyst, feeding said concentrated settled catalyst into a mixing vessel equipped with mixing means and feeding hydrocarbon diluent into said mixing vessel, to form a diluted catalyst slurry, feeding said diluted catalyst slurry into a polymerisation reactor via a volumetric pump, and feeding at least one monomer into said polymerisation reactor to form a polymer.Type: ApplicationFiled: March 6, 2007Publication date: December 24, 2009Applicant: TOTAL PETROCHEMICALS RESEARCH FELUYInventors: Daniel Siraux, Alain Brusselle
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Publication number: 20090318638Abstract: The invention discloses a metallocene catalysed slurry polymerisation process s of ethylene in the presence of a low concentration of scavenger. This allows improving the anti-sheeting of the reactor during the polymerisation process.Type: ApplicationFiled: March 29, 2007Publication date: December 24, 2009Applicant: TOTAL PETROCHEMICALS RESEARCH FELUYInventors: Olivier Miserque, Martine Slawinski, Daniel Siraux, Alain Brusselle
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Publication number: 20090143546Abstract: A method for controlling the injection of catalyst slurry in a polymerization reactor is described herein. The method includes the preparation of polyethylene with a solid catalyst and a hydrocarbon diluents. The method includes providing solid catalyst and a hydrocarbon diluent in one or more storage vessels such that a catalyst slurry is obtained in said vessel, transferring said catalyst slurry from said storage vessel to a mixing vessel wherein said catalyst slurry is diluted for obtaining a suitable concentration for use in a polymerization reaction, pumping said diluted catalyst slurry at a controlled flow rate from said mixing vessel to said polymerization reactor through one or more conduits, by means of a membrane pump provided in each of said conduits, and the membrane pump is controllable as a function of reactant concentration within the polymerization reactor.Type: ApplicationFiled: October 1, 2008Publication date: June 4, 2009Applicant: ATOFINA RESEARCH S.A.Inventors: Louis Fouarge, Eric Damme, Olivier Miserque, Daniel Siraux, Philippe Bodart, Andre Lewalle, Marc Van der Auwera, Frans Van den Brande, Giacomo Conti, Hugo Vandaele, Mark Verleysen, Carl Van Camp, Etienne Laurent, Philippe Marechal, Marc Moers, Leopold D'Hooghe, Marjan Sillis, Kai Hortman, Pascal Folie, Renaud Oreins
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Patent number: 7470757Abstract: An olefin polymerisation process carried out in the presence of an anti-fouling agent and a chromium-type catalyst or Ziegler Natta catalyst; characterised in that the anti-fouling agent comprises an anti-fouling polymer having an average molecular weight (Mw) of greater than 1000 daltons and containing: (1) one or more blocks —(CH2—CH2—O)k— where each k is in the range from 1 to 50; and (2) one or more blocks —(CH2—CH(R)—(O)n? where R comprises an alkyl group having from 1 to 6 carbon atoms and each n is in the range from 1 to 50, and terminated by a R? and a R? end groups, wherein R? is OH or an alkoxy having from 1 to 6 carbon atoms and R? is H or an alkyl having from 1 to 6 carbon atoms.Type: GrantFiled: February 8, 2005Date of Patent: December 30, 2008Assignee: Total Petrochemicals Research FeluyInventors: Olivier Miserque, Daniel Siraux, Philippe Bodart
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Publication number: 20080119622Abstract: An olefin polymerisation process carried out in the presence of an anti-fouling agent and a chromium-type catalyst or Ziegler Natta catalyst; characterised in that the anti-fouling agent comprises an anti-fouling polymer having an average molecular weight (Mw) of greater than 1000 daltons and containing: (1) one or more blocks —(CH2—CH2—O)k— where each k is in the range from 1 to 50; and (2) one or more blocks —(CH2—CH(R)—(O)n where R comprises an alkyl group having from 1 to 6 carbon atoms and each n is in the range from 1 to 50, and terminated by a R? and a R? end groups, wherein R? is OH or an alkoxy having from 1 to 6 carbon atoms and R? is H or an alkyl having from 1 to 6 carbon atoms.Type: ApplicationFiled: February 8, 2005Publication date: May 22, 2008Inventors: Olivier Miserque, Daniel Siraux, Philippe Bodart
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Publication number: 20070185288Abstract: The present invention discloses an olefin polymerisation process carried out in the presence of a Ziegler-Natta catalyst in two liquid full loop reactors connected in series wherein different molecular weight fractions are produced to form a polyolefin, said process being characterised in that the Ziegler-Natta catalyst has a particle size distribution d50 of less than 20 pm and greater that 5 pm.Type: ApplicationFiled: February 8, 2005Publication date: August 9, 2007Inventors: Daniel Siraux, Etienne Laurent
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Publication number: 20050272891Abstract: The present invention relates to an apparatus and process for polymerizing olefins. One embodiment comprises polymerizing at least one monomer in a first loop reactor in the presence of a catalyst to produce a first polyolefin fraction. A portion of the first polyolefin fraction is transferred to a second loop reactor, connected in series with the first loop reactor. The process further comprises polymerizing in the second loop reactor at least one monomer in the presence of a catalyst to produce a second polyolefin fraction in addition to the first polyolefin fraction. The combination of the first and second polyolefin fractions can produce a polymer resin fluff having bimodal molecular weight distribution.Type: ApplicationFiled: February 14, 2005Publication date: December 8, 2005Applicant: ATOFINA Research S.A.Inventors: Louis Fouarge, Eric Damme, Olivier Miserque, Daniel Siraux, Philippe Bodart, Andre Lewalle, Marc Auwera, Frans Brande, Giacomo Conti, Hugo Vandaele, Mark Verleysen, Carl Camp, Etienne Laurent, Philippe Marechal, Marc Moers, Leopold D'Hooghe, Marjan Sillis, Kai Hortman, Pascal Folie, Renaud Oreins