Abstract: Methods and systems for olefin polymerization are provided. The method for olefin polymerization can include flowing a catalyst through an injection nozzle and into a fluidized bed disposed within a reactor. The method can also include flowing a feed comprising one or more monomers, one or more inert fluids, or a combination thereof through the injection nozzle and into the fluidized bed. The feed can be at a temperature greater than ambient temperature. The method can also include contacting one or more olefins with the catalyst within the fluidized bed at conditions sufficient to produce a polyolefin.
Abstract: A method comprising synthesizing a cyclic organic compound (3) via reaction of an substituted alkene (1) with an unsubstituted or substituted acrylic acid (2) in the presence of a sulfonic acid reagent to make the cyclic organic compound (3) R1(II)C?C(H)R2 (I)
Abstract: A system and method for feeding a chromium-based catalyst to a polymerization reactor; adding a reducing agent to the chromium-based catalyst, and polymerizing an olefin into a polyolefin in the polymerization reactor in the presence of the chromium-based catalyst.
Type:
Grant
Filed:
August 31, 2018
Date of Patent:
August 18, 2020
Assignee:
Univation Technologies, LLC
Inventors:
Kevin R. Gross, Kevin J. Cann, Mark G. Goode, John H. Moorhouse
Abstract: Embodiments of the present disclosure are directed towards metal complexes that can be utilized to form polymers. As an example, the present disclosure provides a metal complex of Formula (I) wherein M is Zr, Hf, or Ti; each Het is independently a heterocyclic; each L is independently a bridging group; each X is independently Cl, Br, I, or alkyl; each R1 is independently selected from the group including hydrogen, alkyls, alkenyls, alkynyls, cycloalkyls, aryls, acyls, aroyls, alkoxys, aryloxys, alkylthiols, dialkylamines, alkylamidos, alkoxycarbonyls, aryloxycarbonyls, carbomoyls, alkyl- and dialkyl-carbamoyls, acyloxys, acylaminos, aroylaminos, aromatic rings, fused aromatic rings, and combinations thereof; and each n is independently an integer having a value of one to five.
Type:
Grant
Filed:
March 13, 2017
Date of Patent:
August 4, 2020
Assignee:
Univation Technologies, LLC
Inventors:
Mahsa Heydari, Roger L. Kuhlman, C. Jeff Harlan
Abstract: Methods and systems for olefin polymerization are provided. The method for olefin polymerization can include flowing a catalyst through an injection nozzle and into a fluidized bed disposed within a reactor. The method can also include flowing a feed comprising one or more monomers, one or more inert fluids, or a combination thereof through the injection nozzle and into the fluidized bed. The feed can be at a temperature greater than ambient temperature. The method can also include contacting one or more olefins with the catalyst within the fluidized bed at conditions sufficient to produce a polyolefin.
Abstract: Disclosed are novel bis(aminophenylphenol) ligands and transition metal compounds derived therefrom. Also disclosed are methods of making the ligands and transition metal compounds.
Abstract: New methods for preparing bridged bi-aromatic ligands are disclosed. The methods employ aryl coupling of unprotected phenols. The ligands may be used to prepare transition metal compounds useful as catalysts in olefin polymerization.
Abstract: Embodiments of the present disclosure are directed towards metal complexes that can be utilized to form polymers. As an example, the present disclosure provides a metal complex of Formula I: wherein each Me represents methyl.
Abstract: Methods for extrusion of polyolefins (112) that control specific energy input to the extruder (102) for gel reduction. Disclosed herein is an example method for forming plastic products (120, 208) with reduced gels, comprising: melting a polyolefin resin (112) in extruder (102) to form a melt; adjusting specific energy input in the extruder (102) to reduce gels in the melt; and forming the melt into a polyolefin product (120, 208). Disclosed herein is also an example method for forming plastic products (120, 20) with reduced gels, comprising: melting a polyolefin resin in extruder (102) to form a melt; selecting a throttle valve (104) position for gel reduction; setting the throttle valve (104) at the selected throttle valve (104) position to restrict flow of the melt out of the extruder (102); and forming the melt into a polyolefin product (120, 208).
Type:
Grant
Filed:
January 20, 2016
Date of Patent:
June 16, 2020
Assignee:
Univation Technologies, LLC
Inventors:
Daudi A. Abe, Brandon C. Locklear, Yuet Meng Chu, T. R. Veariel
Abstract: Catalyst systems and methods for making and using the same are provided. The catalyst system can include a catalyst support, wherein the catalyst support has an average particle size of about 2 microns to about 200 microns. Nanoparticles are adhered to the catalyst support, wherein the nanoparticles have an average particle size of about 2 to about 200 nanometers. A catalyst is supported on the catalyst support.
Type:
Grant
Filed:
March 19, 2019
Date of Patent:
June 9, 2020
Assignee:
Univation Technologies, LLC
Inventors:
Yuanqiao Rao, Ping Cai, Kevin J. Cann, F. David Hussein, Wesley R. Mariott, Phuong A. Cao
Abstract: Catalyst systems and methods for making and using the same are provided. The catalyst system can include a catalyst support, wherein the catalyst support has an average particle size of about 2 microns to about 200 microns. Nanoparticles are adhered to the catalyst support, wherein the nanoparticles have an average particle size of about 2 to about 200 nanometers. A catalyst is supported on the catalyst support.
Type:
Grant
Filed:
March 19, 2019
Date of Patent:
June 9, 2020
Assignee:
Univation Technologies, LLC
Inventors:
Yuanqiao Rao, Ping Cai, Kevin J. Cann, F. David Hussein, Wesley R. Mariott, Phuong A. Cao
Abstract: Disclosed are novel bridged bi-aromatic phenol ligands and transition metal catalyst compounds derived therefrom. Also disclosed are methods of making the ligands and transition metal compounds, and polymerization processes utilizing the transition metal compounds for the production of olefin polymers.
Abstract: The present disclosure provides a method of maintaining a target value of a melt flow index of a polyethylene polymer product being synthesized with a metallocene catalyst in a fluidized bed gas phase reactor. The method includes producing the polyethylene polymer product at the target value of the melt flow index with a metallocene catalyst in a fluidized bed gas phase reactor at a steady state in which the fluidized bed gas phase reactor is at a first reactor temperature and receives feeds of hydrogen and ethylene at a hydrogen to ethylene feed ratio at a first ratio value. When a change in reactor temperature is detected, the hydrogen to ethylene feed ratio is changed from the first ratio value to a second ratio value so as to maintain the melt flow index value of the polyethylene polymer product at the target value.
Type:
Application
Filed:
June 6, 2018
Publication date:
May 7, 2020
Applicant:
Univation Technologies, LLC
Inventors:
Bruce J. Savatsky, R. Eric Pequeno, Brandon C. Locklear, Jim Farley
Abstract: Catalyst systems and methods for making and using the same are disclosed. In an example, a method of synthesizing a monocyclopentadienyl compound is provided. The method includes melting a dicyclopentadienyl compound including the following structure: As used herein, M is hafnium or zirconium. Each R is independently an H, a hydrocarbyl group, a substituted hydrocarbyl group, a heteroatom group. Each X is a leaving group selected from a halogen or a heteroatom group.
Abstract: Catalyst systems and methods for making and using the same are described herein. A catalyst system can include at least three catalysts. The three catalysts include a metallocene catalyst, a first non-metallocene including a ligand complexed to a metal through two or more nitrogen atoms, and a second non-metallocene including a ligand complexed to a metal through one or more nitrogen atoms and an oxygen atom.
Type:
Grant
Filed:
December 11, 2018
Date of Patent:
March 31, 2020
Assignee:
Univation Technologies, LLC
Inventors:
Juliet Bauer Wagner, Garth R. Giesbrecht, Sun-Chueh Kao, Stephen P. Jaker
Abstract: Catalyst systems and methods for making and using the same are described. A method includes selecting a catalyst blend using a blend polydispersity index (bPDI) map. The polydispersity map is generated by generating a number of polymers for at least two catalysts. Each polymer is generated at a different hydrogen to ethylene ratio. At least one catalyst generates a higher molecular weight polymer and another catalyst generates a lower molecular weight polymer. A molecular weight for each polymer is measured. The relationship between the molecular weight of the polymers generated by each of the catalysts and the ratio of hydrogen to ethylene is determined. A family of bPDI curves for polymers that would be made using a number of ratios of a blend of the at least two catalysts for each of a number of ratios of hydrogen to ethylene.
Type:
Grant
Filed:
February 7, 2019
Date of Patent:
March 31, 2020
Assignee:
Univation Technologies, LLC
Inventors:
Francis C. Rix, Ching-Tai Lue, Timothy M. Boller, Garth R. Giesbrecht, C. Jeff Harlan
Abstract: Catalyst systems and methods for making and using the same are provided. The catalyst system can include a catalyst support, wherein the catalyst support has an average particle size of about 2 microns to about 200 microns. Nanoparticles are adhered to the catalyst support, wherein the nanoparticles have an average particle size of about 2 to about 200 nanometers. A catalyst is supported on the catalyst support.
Type:
Grant
Filed:
March 19, 2019
Date of Patent:
March 24, 2020
Assignee:
Univation Technologies, LLC
Inventors:
Yuanqiao Rao, Ping Cai, Kevin J. Cann, F. David Hussein, Wesley R. Mariott, Phuong A. Cao
Abstract: Embodiments of the present disclosure are directed towards methods for rating polymerization processes based upon a first cracking index (value and a second cracking index value.
Type:
Application
Filed:
December 6, 2017
Publication date:
March 12, 2020
Applicant:
Univation Technologies, LLC
Inventors:
Ping Cai, Francois Alexandre, Mark G. Goode