The present invention provides a solid catalyst component for polymerization of an olefin, which appropriately suppresses a decrease in polymerization activity per unit time when having been supplied to the polymerization of the olefin, even without using a phthalic acid ester, and can easily prepare a polymer of an olefin, in which drying efficiency is improved, and a content ratio of a remaining volatile organic compound is greatly reduced in a short period of time. The solid catalyst component for polymerization of an olefin includes magnesium, titanium, halogen and a 1,3-diether compound, wherein a ratio of the 1,3-diether compound contained in the solid catalyst component for polymerization of an olefin is 2.50 to 15.00% by mass, and a specific surface area of the solid catalyst component for polymerization of an olefin is 250 m.sup.2/g or larger.

The present invention provides a solid catalyst component for polymerization of an olefin, which appropriately suppresses a decrease in polymerization activity per unit time when having been supplied to the polymerization of the olefin, even without using a phthalic acid ester, and can easily prepare a polymer of an olefin, in which drying efficiency is improved, and a content ratio of a remaining volatile organic compound is greatly reduced in a short period of time. The solid catalyst component for polymerization of an olefin includes magnesium, titanium, halogen and a 1,3-diether compound, wherein a ratio of the 1,3-diether compound contained in the solid catalyst component for polymerization of an olefin is 2.50 to 15.00% by mass, and a specific surface area of the solid catalyst component for polymerization of an olefin is 250 m.sup.2/g or larger.

The present disclosure relates to a process for producing linear alpha olefins in high yield carried out by oligomerization of ethylene in the presence of a novel catalyst composition. The catalyst composition includes Zirconium compound, an organoaluminum compound, and at least one Lewis base selected from cyclic and acyclic ethers (i.e., di-n-butyl ether and diethyl ether). The process for oligomerization of ethylene is carried out in an inert organic solvent in the presence of said catalyst composition. The process as disclosed herein provides significantly high activity of the said catalyst composition resulting in high yield of the alpha olefins (>95 wt. %) as the product and significantly minimum polymer as by-product. The process provides higher yield of C6-C10 fraction with >60 wt. %.

The present disclosure relates to a process for producing linear alpha olefins in high yield carried out by oligomerization of ethylene in the presence of a novel catalyst composition. The catalyst composition includes Zirconium compound, an organoaluminum compound, and at least one Lewis base selected from cyclic and acyclic ethers (i.e., di-n-butyl ether and diethyl ether). The process for oligomerization of ethylene is carried out in an inert organic solvent in the presence of said catalyst composition. The process as disclosed herein provides significantly high activity of the said catalyst composition resulting in high yield of the alpha olefins (>95 wt. %) as the product and significantly minimum polymer as by-product. The process provides higher yield of C6-C10 fraction with >60 wt. %.

Embodiments are directed to a metal-ligand complex catalyst precursor, (L.sup.1)(L.sup.2)X(R.sup.1)(R.sup.2), and methods for producing the same from a compound of formula Q.sub.2X(R.sup.1)(R.sup.2). L.sup.1 and L.sup.2 are independently —R.sup.3—Z.sup.1 or —R.sup.4—Z.sup.1. R.sup.1 and R.sup.2 are independently selected from a hydrogen atom, (C.sub.1-C.sub.40)hydrocarbyl and, optionally, R.sup.1 and R.sup.2 are connected to form a ring having from 3 to 50 atoms in the ring, excluding hydrogen atoms. X is Si, Ge, Sn, or Pb. Each Q is independently Ar.sup.1—Y.sup.1R.sup.3— or Ar.sup.2—Y.sup.2—R.sup.4—. R.sup.3 and R.sup.4 are independently selected from —(CR.sup.C.sub.2).sub.m—, where m is 1 or 2, and where each R.sup.c is independently selected from the group consisting of (C.sub.1-C.sub.40)hydrocarbyl, (C.sub.1-C.sub.40)heterohydrocarbyl, and —H. Y.sup.1 and Y.sup.2 are independently S, Se, or Te. Ar.sup.1 and Ar.sup.2 are independently (C.sub.6-C.sub.50)aryl. Ar.sup.1—Y.sup.1—R.sup.3— and Ar.sup.2—Y.sup.2—R.sup.4— are not identical. Each Z.sup.1 is independently selected from Cl, Br, and I.

Embodiments are directed to a metal-ligand complex catalyst precursor, (L.sup.1)(L.sup.2)X(R.sup.1)(R.sup.2), and methods for producing the same from a compound of formula Q.sub.2X(R.sup.1)(R.sup.2). L.sup.1 and L.sup.2 are independently —R.sup.3—Z.sup.1 or —R.sup.4—Z.sup.1. R.sup.1 and R.sup.2 are independently selected from a hydrogen atom, (C.sub.1-C.sub.40)hydrocarbyl and, optionally, R.sup.1 and R.sup.2 are connected to form a ring having from 3 to 50 atoms in the ring, excluding hydrogen atoms. X is Si, Ge, Sn, or Pb. Each Q is independently Ar.sup.1—Y.sup.1R.sup.3— or Ar.sup.2—Y.sup.2—R.sup.4—. R.sup.3 and R.sup.4 are independently selected from —(CR.sup.C.sub.2).sub.m—, where m is 1 or 2, and where each R.sup.c is independently selected from the group consisting of (C.sub.1-C.sub.40)hydrocarbyl, (C.sub.1-C.sub.40)heterohydrocarbyl, and —H. Y.sup.1 and Y.sup.2 are independently S, Se, or Te. Ar.sup.1 and Ar.sup.2 are independently (C.sub.6-C.sub.50)aryl. Ar.sup.1—Y.sup.1—R.sup.3— and Ar.sup.2—Y.sup.2—R.sup.4— are not identical. Each Z.sup.1 is independently selected from Cl, Br, and I.

The present disclosure provides catalyst compounds represented by Formula (I): ##STR00001##
where Q is OR.sup.13, SR.sup.13, NR.sup.13R.sup.14, PR.sup.13R.sup.14, or a heterocyclic ring; each R.sup.1-14 is independently hydrogen, C.sub.1-C.sub.40 hydrocarbyl, substituted C.sub.1-C.sub.40 hydrocarbyl, a heteroatom, or a heteroatom-containing group, or multiple R.sup.1-14 are joined together to form a C.sub.4-C.sub.62 cyclic, heterocyclic, or polycyclic ring structure, or combination(s) thereof; each X.sup.1 and X.sup.2 is independently C.sub.1-C.sub.20 hydrocarbyl, substituted C.sub.1-C.sub.20 hydrocarbyl, a heteroatom, or a heteroatom-containing group, or X.sup.1 and X.sup.2 join together to form a C.sub.4-C.sub.62 cyclic, heterocyclic, or polycyclic ring structure; and Y is a hydrocarbyl. The present disclosure also provides catalyst systems including an activator, a support, and a catalyst of the present disclosure. The present disclosure also provides polymerization processes including introducing olefin monomers to a catalyst system. Additionally, the present disclosure provides a polyolefin formed by a catalyst system or method of the present disclosure.

The present invention provides a process for the preparation of a multimodal polyethylene comprising: (i) polymerising ethylene and optionally an α-olefin comonomer in a first polymerisation stage to produce a first ethylene polymer; and (ii) polymerising ethylene and optionally an α-olefin comonomer, in the presence of said first ethylene polymer, in a second polymerisation stage, wherein the first and second polymerisation stages are carried out in the presence of an unsupported metallocene catalyst and each polymerisation stage produces at least 5% wt of the multimodal polyethylene, and the multimodal polyethylene has a multimodal molecular weight distribution, a molecular weight of at least 50,000 g/mol and a bulk density of at least 250 g/dm.sup.3, and wherein a solution of the unsupported metallocene catalyst in a solvent is employed. The present invention also provides a multimodal polyethylene, a process for preparing a pipe comprising preparing a multimodal polyethylene and extruding the multimodal recycle polyethylene to produce a pipe, and a pipe obtained by such a process.

The present invention provides a process for the preparation of a multimodal polyethylene comprising: (i) polymerising ethylene and optionally an α-olefin comonomer in a first polymerisation stage to produce a first ethylene polymer; and (ii) polymerising ethylene and optionally an α-olefin comonomer, in the presence of said first ethylene polymer, in a second polymerisation stage, wherein the first and second polymerisation stages are carried out in the presence of an unsupported metallocene catalyst and each polymerisation stage produces at least 5% wt of the multimodal polyethylene, and the multimodal polyethylene has a multimodal molecular weight distribution, a molecular weight of at least 50,000 g/mol and a bulk density of at least 250 g/dm.sup.3, and wherein a solution of the unsupported metallocene catalyst in a solvent is employed. The present invention also provides a multimodal polyethylene, a process for preparing a pipe comprising preparing a multimodal polyethylene and extruding the multimodal recycle polyethylene to produce a pipe, and a pipe obtained by such a process.

Embodiments of the present disclosure directed towards converting a non-metallocene precatalyst into a productivity enhanced non-metallocene catalyst. As an example, the present disclosure provides a method of making an productivity enhanced non-metallocene catalyst, the method comprising combining a first non-metallocene precatalyst, an effective amount of an activator, and an effective amount of a productivity-increasing organic compound under conditions effective for the activator and the productivity-increasing organic compound to chemically convert the first non-metallocene precatalyst into the productivity enhanced non-metallocene catalyst; wherein the productivity-increasing organic compound is of formula (A), as detailed herein.