Provided are a catalyst composition and a method of oligomerizing olefins using the same. When the catalyst composition according to the present invention is used, oligomerization and copolymerization of olefin monomers may be performed in a single reactor at the same time with high efficiency without a separate process of preparing alpha-olefin. Therefore, costs for preparing or purchasing comonomers which are expensive raw materials may be reduced, thereby reducing the production cost of a final product. Contents of SCB (short chain branch) and LCB (long chain branch) in the polyolefin may be increased without separate feeding of comonomers, thereby producing high-quality linear low-density polyethylene.

Methods for integrating aluminoxane production into catalyst production are disclosed.

Methods for integrating aluminoxane production into catalyst production are disclosed.

An asphalt additive comprising a primary rheology modifying component and a secondary rheology modifying component, and asphalt compositions and products having such additive incorporated therein. The primary rheology modifying component is generally a polymer, and the secondary rheology modifying component may comprise a petroleum micro-wax.

A process for preparing an ethylene polymer in a suspension polymerization including the steps of separating the formed suspension of ethylene polymer particles in a solid-liquid separator into wet ethylene polymer particles and mother liquor, transferring a part of the mother liquor into a work-up section including an evaporator for producing a wax-depleted portion of the mother liquor, a diluent distillation unit for producing isolated diluent from the wax-depleted portion of the mother liquor, and a wax removal unit operated by direct steam distillation for producing a gaseous hydrocarbon/steam mixture which is condensed and then separated into an aqueous phase and a hydrocarbon phase, wherein a first part of the hydrocarbon phase is transferred to the diluent distillation unit without passing the evaporator for producing the wax-depleted portion of the mother liquor.

A catalyst composition for use as precursor for Ziegler-Natta catalyst system, said catalyst composition comprising a combination of magnesium moiety, titanium moiety and an internal donor containing at least one 1,2-phenylenedioate compound of structure (A). Also, the present invention provides a process for preparing the aforesaid catalyst composition. Further, the present invention provides a Ziegler-Natta catalyst system incorporating the aforesaid catalyst composition and a method for polymerizing and/or copolymerizing olefins using the Ziegler-Natta catalyst system. ##STR00001##

A solid catalyst component mixture for polymerizing olefins that allows a polymer of olefins having both a high melt flowability and rigidity to be easily produced is provided.

A solid catalyst component mixture for polymerizing olefins comprises: a first solid catalyst component for polymerizing olefins containing magnesium, titanium, halogen and a succinate diester compound, and a second solid catalyst component for polymerizing olefins containing magnesium, titanium, halogen and a phthalate diester compound, at a mass ratio of First solid catalyst component for polymerizing olefins:Second solid catalyst component for polymerizing olefins=37:63 to 87:13.

A solid catalyst component mixture for polymerizing olefins that allows a polymer of olefins having both a high melt flowability and rigidity to be easily produced is provided.

A solid catalyst component mixture for polymerizing olefins comprises: a first solid catalyst component for polymerizing olefins containing magnesium, titanium, halogen and a succinate diester compound, and a second solid catalyst component for polymerizing olefins containing magnesium, titanium, halogen and a phthalate diester compound, at a mass ratio of First solid catalyst component for polymerizing olefins:Second solid catalyst component for polymerizing olefins=37:63 to 87:13.

A solid catalyst component for the polymerization of olefins, made from or containing Ti, Mg and an internal donor selected from 1,3-diethers, wherein the solid catalyst component, has (i) an average particle size D50 ranging from 55 to 80 m and (ii) a surface area (SA), determined with the BET method, such that the value of the formula SAD50/100 is higher than 60.

A solid catalyst component for the polymerization of olefins, made from or containing Ti, Mg and an internal donor selected from 1,3-diethers, wherein the solid catalyst component, has (i) an average particle size D50 ranging from 55 to 80 m and (ii) a surface area (SA), determined with the BET method, such that the value of the formula SAD50/100 is higher than 60.