Abstract: The present disclosure provides a method of determining a relative decrease in catalytic efficacy of a catalyst in a test sample of a catalyst solution with unknown catalytic activity. The method includes (a) mixing the test sample with a test solvent to form a test mixture and (b) measuring the increase in the temperature of the test mixture at predetermined time intervals immediately after forming the test mixture. A predetermined feature is used to determine both a test value in the increase in temperature measured in (b) and a control value in a known increase in temperature of a control mixture of the test solvent with a control sample of a control catalyst solution.

Abstract: Catalyst systems and methods for making and using the same are disclosed. A catalyst composition is provided that includes a catalyst compound supported to form a supported catalyst system, the catalyst compound including: where each of R1, R2, R3, R4, R5, R6, R7 and X are as discussed herein.

Abstract: A polymerization catalyst system, a method of using the polymerization catalyst system, and a polymer produced with the catalyst system. The polymerization catalyst system has a non-metallocene catalyst and a metallocene catalyst. The metallocene catalyst has the formula: wherein R1 and R2 are each independently, phenyl, methyl, chloro, fluoro, or a hydrocarbyl group.

Abstract: Catalyst systems and methods for making and using the same. A method of polymerizing olefins to produce a polyolefin polymer with a multimodal composition distribution, includes contacting ethylene and a comonomer with a catalyst system. The catalyst system includes a first catalyst compound and a second catalyst compound that are co-supported to form a commonly supported catalyst system. The first catalyst compound includes a compound with the general formula (C5HaR1b)(C5HcR2d)HfX2. The second catalyst compound includes at least one of the following general formulas: In both catalyst systems, the R groups can be independently selected from any number of substituents, including, for example, H, a hydrocarbyl group, a substituted hydrocarbyl group, or a heteroatom group, among others.

Abstract: A polymerization catalyst system, a method of using the polymerization catalyst system, and a polymer produced with the catalyst system. The polymerization catalyst system has a non-metallocene catalyst and a metallocene catalyst. The metallocene catalyst has the formula: wherein R1 and R2 are each independently, phenyl, methyl, chloro, fluoro, or a hydrocarbyl group.

Abstract: Package-receiving-lockers (PRLs) may have a collapsible-locker portion and door-attachment-structure. PRLs may exist in a substantially collapsed configuration for storing the given PRL or for otherwise minimizing a footprint of the given PRL; and these PRLs may exist in a substantially deployed (expanded) configuration for acting as a secure object storage location. Regardless of configuration (deployed or collapsed), PRLs may be removably attached to side-hinged-doors with the door-attachment-structure, in such a way so as not to impair operation of the given door. The PRLs may have various electronics for facilitating access (e.g., locking and unlocking the collapsible-locker), delivery confirmation, and mitigating theft. These electronics, along with specialized software, may allow an intended recipient (e.g., a buyer), a shipper/delivery person (or shipping/deliver robot), and/or a seller/vendor to access the PRL in a controlled and documented manner.

Abstract: Synthetic methods for the preparation of ligands and metal-ligand complexes are disclosed.

Abstract: Package-receiving-lockers (PRLs) may have a collapsible-locker portion and door-attachment-structure. PRLs may exist in a substantially collapsed configuration for storing the given PRL or for otherwise minimizing a footprint of the given PRL; and these PRLs may exist in a substantially deployed (expanded) configuration for acting as a secure object storage location. Regardless of configuration (deployed or collapsed), PRLs may be removably attached to side-hinged-doors with the door-attachment-structure, in such a way so as not to impair operation of the given door. The PRLs may have various electronics for facilitating access (e.g., locking and unlocking the collapsible-locker), delivery confirmation, and mitigating theft. These electronics, along with specialized software, may allow an intended recipient (e.g., a buyer), a shipper/delivery person (or shipping/deliver robot), and/or a seller/vendor to access the PRL in a controlled and documented manner.

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.

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: 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: 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. 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.

Abstract: A high density, high polydispersity polyethylene having improved properties, and a process of producing same.

Abstract: Embodiments of the present disclosure directed towards polymerization catalysts having improved ethylene enchainment. As an example, the present disclosure provides a polymerization catalyst having improved ethylene enchainment, the polymerization catalyst comprising a zirconocene catalyst of Formula (I) where R1 is a C1 to C20 alkyl, aryl or aralkyl group, wherein R2 is an C1 to C20 alkyl, aryl or aralkyl group, and where R3 is a C1 to C20 alkyl or a hydrogen, and where each X is independently a halide, C1 to C20 alkyl, aralkyl group or hydrogen.

Abstract: Catalyst systems and methods for making and using the same are disclosed. A catalyst composition is provided that includes a catalyst compound supported to form a supported catalyst system, the catalyst compound including: where each of R1, R2, R3, R4, R5, R6, R7 and X are as discussed herein.

Abstract: Synthetic methods for the preparation of ligands and metal-ligand complexes are disclosed.

Abstract: Catalyst systems and methods for making and using the same. A method of methylating a catalyst composition while substantially normalizing the entiomeric distribution is provided. The method includes slurrying the organometallic compound in dimethoxyethane (DME), and adding a solution of RMgBr in DME, wherein R is a methyl group or a benzyl group, and wherein the RMgBr is greater than about 2.3 equivalents relative to the organometallic compound. After the addition of the RMgBr, the slurry is mixed for at least about four hours. An alkylated organometallic is isolated, wherein the methylated species has a meso/rac ratio that is between about 0.9 and about 1.2.

Abstract: Package-receiving-lockers (PRLs) may have a collapsible-locker portion and door-attachment-structure. PRLs may exist in a substantially collapsed configuration for storing the given PRL or for otherwise minimizing a footprint of the given PRL; and these PRLs may exist in a substantially deployed (expanded) configuration for acting as a secure object storage location. Regardless of configuration (deployed or collapsed), PRLs may be removably attached to side-hinged-doors with the door-attachment-structure, in such a way so as not to impair operation of the given door. The PRLs may have various electronics for facilitating access (e.g., locking and unlocking the collapsible-locker), delivery confirmation, and mitigating theft. These electronics, along with specialized software, may allow an intended recipient (e.g., a buyer), a shipper/delivery person (or shipping/deliver robot), and/or a seller/vendor to access the PRL in a controlled and documented manner.

Abstract: Synthetic methods for the preparation of ligands and metal-ligand complexes are disclosed.