Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7427653 | Catalyst components for the polymerization of olefins A catalyst component for olefin (co)polymerization, and in particular for the preparation of LLDPE, comprising Mg, Ti, halogen and an electron donor compound (ED) belonging to ethers, esters, amines, ketones, or nitriles, characterized in that the molar ratio Mg/Ti ... | 09/23/2008 |
| 7390764 | Organometal catalyst compositions This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said catal... | 06/24/2008 |
| 7332455 | Catalyst component and catalyst for olefin polymerization as well as use thereof The present invention relates to a catalyst component and a catalyst for olefin polymerization. The catalyst component utilizes magnesium halide and silica as composite support, and the particle morphology thereof can be improved by regulating the ratio of magnesium... | 02/19/2008 |
| 7316987 | Components and catalysts for the polymerization of olefins Catalyst component for the polymerization of olefins obtainable by contacting: (i) a magnesium halide, or a suitable precursor; (ii) a monofunctional electron donor compound (MD) selected from ethers, esters, amines or ketones, used in such amounts to have Mg/MD mol... | 01/08/2008 |
| 7271119 | Process for preparing an olefin polymerization catalyst component Process for preparing an olefin polymerisation catalyst component in the form of particles having a predetermined size range, said process comprising the steps of a) preparing a solution of a complex of a Group 2 metal and an electron donor by reacting a compound of... | 09/18/2007 |
| 7271120 | Catalyst for the synthesis of dimethyl carbonate from urea and methanol, preparation and use thereof A catalyst for the preparation of dimethyl carbonate from urea and methanol having a composition on weight base of: active component of from 20 to 50 wt %, and carrier of from 80 to 50 wt %, and prepared by equal-volume spraying and impregnating method is disclosed.... | 09/18/2007 |
| 7256151 | Solid catalyst component for α-olefin polymerization, process for producing catalyst therefor, and process for producing α-olefin polymer A solid catalyst component for α-olefin polymerization, which comprises a titanium atom, a magnesium atom, a halogen atom, a phthalic acid ester compound, and a 1,3-diether compound, wherein an amount of the 1,3-diether compound contained in the solid catalyst comp... | 08/14/2007 |
| 7256150 | Preparation of olefin polymerization catalyst component A process for producing a Gp 2/transition metal olefin polymerisation catalyst component, in which a Gp 2 complex is reacted with a transition metal compound so as to produce an oil-in-oil emulsion, the disperse phase containing the preponderance of the Gp 2 metal b... | 08/14/2007 |
| 7220696 | Solid titanium catalyst component for olefin polymerization, catalyst for olefin polymerization, and process for olefin polymerization Disclosed is a catalyst for olefin polymerization comprising [I] a solid titanium catalyst component [S] comprising titanium, magnesium, halogen and an electron donor (b), which is obtained by bringing a solid adduct consisting of a magnesium compound and an electro... | 05/22/2007 |
| 7211534 | Preparation of a magnesium halide support for olefin polymerization and a catalyst composition using the same A magnesium halide support material for a polyolefin catalysts is disclosed. The magnesium halide of present invention is prepared by reacting magnesium with an alkylhalide in a non-polar hydrocarbon solvent. Preparation of the support does not require the use elect... | 05/01/2007 |
| 7199201 | Synthetic polyisoprene rubber The neodymium catalyst system prepared by the technique of this invention can be used in the polymerization of isoprene monomer into synthetic polyisoprene rubber having an extremely high cis-microstructure content and high stereo regularity. This polyisoprene rubbe... | 04/03/2007 |
| 7114103 | System for finding and removing errors using a serial bus for a microcontroller The present invention relates a system adapted to localize and remove software type errors comprising a microcontroller (10) and storing means (11), said microcontroller (10) being connected to said storing means (11) by a serial type bus... | 09/26/2006 |
| 7109277 | Polymerization catalysts A process to produce a polymer is provided. The process comprising contacting a treated solid oxide compound, an organometal compound, and an organoaluminum compound in the presence of an alpha olefin under polymerization conditions to produce the polymer. ... | 09/19/2006 |
| 7109142 | Solid catalyst component and catalyst for olefin polymerization, and process for producing olefin polymer This invention concerns a solid catalyst component for olefin polymerization and the process for obtaining the catalyst component having titanium, halogen, magnesium, an organic acid ester and a relative surface area of 0.1–15 m2/g as measured according... | 09/19/2006 |
| 7091151 | Catalytic system for aldol reactions The invention relates to a catalytic system for use in a process for the preparation, in a single step, of enones by an aldol condensation of a ketone, such as a gem-dimethyl cyclohexylethanone or gem-dimethyl cyclohexenylethanone derivative, with an aldehyde in the... | 08/15/2006 |
| 7091150 | Synthetic polyisoprene rubber The neodymium catalyst system prepared by the technique of this invention can be used in the polymerization of isoprene monomer into synthetic polyisoprene rubber having an extremely high cis-microstructure content and high stereo regularity. This polyisoprene rubbe... | 08/15/2006 |
| 7074736 | Hydrozirconated matrix and process for polyolefin production A hydrozirconated matrix for the production of polyolefins is disclosed. The hydrozirconated matrix is prepared from the reaction of an organozirconium composition and an olefin based material. A process is described for using the hydrozirconated matrix to prepare a... | 07/11/2006 |
| 7049377 | 1,3-diethers and components and catalysts for the polymerization of olefins, containing said diethers Cyclopolyenic 1,3-diethers wherein the carbon atom in position 2 belongs to a particular cyclic or polycyclic structure containing two or three unsaturations, solid catalyst components and catalysts therefrom, the catalysts comprising the reaction product of: ... | 05/23/2006 |
| 7026265 | Catalyst component comprising magnesium, titanium, a halogen and an electron donor, its preparation and use Process for the preparation of a particular olefin polymerisation catalyst component including magnesium dihalide, titanium tetrahalide and a carboxylic acid ester, in which the precursors of its constituents are reacted in solution from which the component is preci... | 04/11/2006 |
| 7022795 | Highly crystalline propylene homopolymers Propylene homopolymers, wherein, in their separation according to tacticity by first dissolving the polymers in boiling xylene, then cooling the solution to 25° C. at a cooling rate of 10° C./h and then, with ascending temperature, separating the propylene homopol... | 04/04/2006 |
| 7022793 | Process for the treatment of polymer compositions A process for the preparation of heterophasic elastomeric polymer comprising the step of polymerizing ethylene, an alpha-olefin CH2═CHL, where L is an alkyl, cycloalkyl or aryl radical with 1–10 carbon atoms and a non-conjugated diene in the presence of a cataly... | 04/04/2006 |
| 7015169 | Catalyst systems of the ziegler-natta type and their preparation The present invention relates to catalyst systems of the Ziegler-Natta type, to a process for preparing them, to their use for the polymerization of olefins and to ethylene copolymers which can be prepared using this catalyst system. ... | 03/21/2006 |
| 7005487 | Catalyst system for the polymerization of olefins A solid catalyst component for the polymerization of olefins, comprising: an inert porous support, Mg, Ti, halogen and an electron donor selected from succinates of formula (I) wherein the radicals R1 and R2 equal to or different form each othe... | 02/28/2006 |
| 6989342 | Catalyst for polymerization and copolymerization of ethylene A solid titanium complex catalyst for polymerization and copolymerization of ethylene is prepared by the process comprising: (1) preparing a magnesium solution by reacting a halogenated magnesium compound with an alcohol; (2) reacting the magnesium solution with a p... | 01/24/2006 |
| 6984603 | Organometal catalyst compositions This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said cata... | 01/10/2006 |
| 6916895 | Ziegler-Natta catalyst for tuning MWD of polyolefin, method of making, method of using, and polyolefins made therewith A new synthesis of a Ziegler-Natta catalyst uses a multi-step preparation that includes treating a magnesium dialkoxide compound with halogenating/titanating agents, an organoaluminum preactivating agent, and a heat treatment. The catalyst may be used in the polymer... | 07/12/2005 |
| 6916759 | Method for producing a catalyst for homo-or co-polymerization of ethylene A method of making an olefin polymerization catalyst is disclosed. The method involves contacting a magnesium halide compound with an alcohol, adding a mineral oil to the product, reacting this product with a hydroxylated ester and an alkoxy silane, then adding a ti... | 07/12/2005 |
| 6914028 | Method for producing a catalyst for homo-or co-polymerization of ethylene A method of making an olefin polymerization catalyst is disclosed. The method first combines a magnesium halide with an alcohol, then adds a hydroxylated ester and a silicon alkoxide, followed by a titanium compound and another silicon compound to result in a solid ... | 07/05/2005 |
| 6878659 | Solid catalyst component for olefin polymerization and catalyst A solid catalyst component for olefin polymerization characterized by being formed from (a) a magnesium compound, (b) titanium tetrachloride, (c) a phthalic diester and a derivative thereof, and either (d1) a hydroxylated hydrocarbon compound (phenol, etc... | 04/12/2005 |
| 6864207 | Ziegler-Natta catalyst for polyolefins A process for making a polyolefin catalyst component, catalyst and polymer resin is disclosed. Controlling the viscosity of a catalyst synthesis solution with the addition of aluminum alkyl alters the precipitation of the catalyst component from a catalyst synthesis... | 03/08/2005 |
| 6864208 | Method for production of a solid catalyst for olefin polymerization A catalyst solid for olefin polymerization comprising A) at least one magnesium halide, B) at least one metallocene complex and C) at least one compound capable of forming metallocenium ions, ... | 03/08/2005 |
| 6855656 | Polymerization and propylene block copolymer A propylene block copolymer with a high proportion of ethylene-propylene copolymer particles (rubber component) well dispersed in a propylene polymer exhibiting well-balanced rigidity and impact resistance can be obtained by using a solid catalyst for polymerization... | 02/15/2005 |
| 6831033 | Method of preparing a catalyst for polymerization and copolymerization of ethylene A solid titanium complex catalyst for polymerization and copolymerization of ethylene is prepared by the process that includes: (1) preparing a magnesium solution by reacting a halogenated magnesium compound with an alcohol; (2) reacting the magnesium solution with ... | 12/14/2004 |
| 6803428 | Process for preparing a catalyst support for polymerization of α-olefins, and support thus obtained A process is provided for preparing a catalyst support for polymerizing α-olefins comprising the steps of: (i) reacting, in the presence of a first electron donor, a chlorine-containing organic compound and a prior mixture of an alkylmagnesien and an aluminoxane an... | 10/12/2004 |
| 6777365 | Magnesium compound, olefin polymerization catalyst, and method for producing olefin polymer The invention relates to a magnesium compound effective in producing olefin polymers having an increased bulk density and a narrowed particle size distribution, not lowering the stereospecificity of the polymers produced and not lowering the polymerization activity ... | 08/17/2004 |
| 6762145 | Method of making a catalyst for polymerization and co-polymerization of ethylene The present invention relates to a catalyst for polymerization and co-polymerization of ethylene. More particularly, the present invention relates to a solid titanium catalyst containing magnesium, wherein said catalyst is produced by preparing a magnesium solution ... | 07/13/2004 |
| 6734134 | Ziegler-natta catalyst for tuning MWD of polyolefin, method of making, method of using, and polyolefins made therewith A new synthesis of a Ziegler-Natta catalyst uses a multi-step preparation that includes treating a magnesium dialkoxide compound with two halogenating/titanating agents, the second stronger than the first, an organoaluminum preactivating agent, and a heat treatment.... | 05/11/2004 |
| 6730627 | Solid component of catalyst for the (co) polymerization of ethylene and α-olefins A solid component of catalyst for the (co)polymerization of ethylene and α-olefins contains magnesium-carboxylate bonds and transition metal-carboxylate and can be represented by the formula: M1Mg(0.3-20)X(2-60)Al | 05/04/2004 |
| 6699813 | Lanthanide-based catalyst composition for the manufacture of polydienes A catalyst composition that is the combination of or the reaction product of ingredients comprising (a) an lanthanide compound, (b) an alkylating agent, (c) a nickel-containing compound, and optionally (d) a halogen-containing compound, with the proviso t... | 03/02/2004 |
| 6683018 | Method for producing a supported catalyst system A process for the preparation of a supported catalyst system, an inorganic carrier material being reacted with a metal compound of the formula in the presence of an inert solvent in a first step and, in a subsequent step, the suspension thus obtained being rea... | 01/27/2004 |
