- Multilateral characterization for industrial Ziegler-Natta catalysts toward elucidation of structure-performance relationship
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High-performance Ziegler-Natta catalysts with ill-defined structural hierarchy were studied over multi-length scales. In this study, multilateral characterization was performed to address quantitative structure-performance relationships in ethylene/1-hexene copolymerization with Mg(OEt) 2-based Ziegler-Natta catalysts. Macroscopic characteristics of the catalysts (e.g., particle size and meso- and macropore volumes) were greatly affected by structures of Mg(OEt)2 precursor particles, while microscopic characteristics (e.g., micropore volume and chemical composition) were hardly influenced. Ethylene/1-hexene copolymerization results suggested the significance of monomer diffusion: The activity was enhanced for smaller catalyst particles, while the 1-hexene incorporation was improved with larger meso- and macropore volumes.
- Taniike, Toshiaki,Funako, Toshiki,Terano, Minoru
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Read Online
- Alkoxymagnesium, method for producing alkoxymagnesium, solid catalyst component for olefin polymerization, olefin polymerization catalyst, and method for producing olefin polymer
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There is provided a novel alkoxymagnesium which, when used as a constituent of a solid catalyst component for olefin polymerization to polymerize an olefin, may reduce the formation rate of a fine powder and may form a polymer having an excellent particle size distribution under high polymerization activity. The alkoxymagnesium is characterized by comprising secondary particles each of which is an aggregate of primary particles having an average particle diameter of less than 1 μm and by having a ratio represented by the average particle diameter of the primary particles/the average particle diameter of the secondary particles of 0.1 or less, a total pore volume of 0.5 to 1 cm3/g, a specific surface area of less than 50 m2/g, and a particle size distribution index (SPAN) 1 or less.
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Page/Page column 24; 26-34
(2021/05/19)
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- METHOD FOR PRODUCING DIALKOXYMAGNESIUM, SOLID CATALYST COMPONENT FOR OLEFIN POLYMERIZATION, SOLID CATALYST FOR OLEFIN POLYMERIZATION, AND METHOD FOR PRODUCING OLEFIN POLYMER
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PROBLEM TO BE SOLVED: To provide a method for producing dialkoxymagnesium which gives dialkoxymagnesium having a small particle size distribution index (SPAN). SOLUTION: There is provided a method for producing dialkoxymagnesium including preparing dialkoxymagnesium by the reaction between magnesium metal and alcohol in the presence of a reaction promoter, where a surfactant is added before or during the reaction of the metal magnesium with the alcohol. SELECTED DRAWING: None COPYRIGHT: (C)2020,JPOandINPIT
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Paragraph 0120-0134
(2020/02/18)
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- Alkoxy metal powder as well as preparation method and application thereof
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The invention relates to a preparation method and an application of alkoxy metal powder, which are applied to preparation of an alkoxy metal carrier of an olefin polymerization catalyst. The alkoxy metal carrier comprises the following components: metal halide, sodium alcoholate or potassium alcoholate, or a solvent. The molar ratio of the components for preparing the alkoxy metal compound is as follows: metal halide: sodium alcoholate or potassium alcoholate = 1:(0.001-30); wherein the metal halide is a metal chloride, a metal bromide, a metal fluoride or a metal iodide; the metal is a main group metal, a sub-group metal or a VIII group metal. The catalyst prepared from the carrier is used for preparing an olefin polymerization catalyst, and has the advantages of high catalyst activity, good hydrogen regulation performance, good copolymerization performance, low polymer powder content, low wax content and good particle morphology; the catalyst is used for ethylene homopolymerization,ethylene and alpha-olefin copolymerization or ethylene and polar alkene monomer copolymerization, propylene homopolymerization, propylene and alpha-olefin copolymerization, or propylene and polar alkene monomer copolymerization.
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Paragraph 0069-0070; 0103-0104
(2019/12/02)
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- METHOD FOR PRODUCING DIALKOXYMAGNESIUM, CATALYST COMPONENT FOR OLEFIN POLYMERIZATION, CATALYST FOR OLEFIN POLYMERIZATION, AND METHOD FOR PRODUCING OLEFIN POLYMER
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PROBLEM TO BE SOLVED: To provide a method for producing dialkoxymagnesium that makes it possible to obtain dialkoxymagnesium having a smooth surface, a large average particle size, and a narrow particle size distribution. SOLUTION: The present invention provides a method for producing dialkoxymagnesium including preparing dialkoxymagnesium by the reaction between magnesium metal and alcohol in the presence of a reaction promoter, where the reaction promoter is a carboxylic acid monohalogen compound or dicarboxylic acid dihalogen compound represented by formula (1) (R1 is a C1-20 a hydrocarbon group; Z is Cl or Br). SELECTED DRAWING: Figure 1 COPYRIGHT: (C)2019,JPOandINPIT
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Paragraph 0104; 0107; 0108; 0109; 0110
(2019/01/12)
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- A preparation method of spherical magnesium ethylate (by machine translation)
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The invention relates to a method for preparing spherical magnesium ethylate, which belongs to the technical field of the preparation of metal oxide. The invention of the preparation method of spherical magnesium ethylate, the protection of inert gas in the reactor, the alcohol and the metal magnesium in including Ding b acid amide base cobalt phthalocyanine and halogen or its salt composite catalyst reaction is carried out under the action of, controlling the reaction temperature at 40?48 °C, fed-batch, after the reaction to the end point, vacuum drying. The resulting ethoxy magnesium has better ball stereoregularity. The method has the special magnesium ethylate in petro-chemical industry are suitable for olefin polymerization catalyst precursor. (by machine translation)
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Paragraph 0017
(2017/01/26)
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- Preparation method of large-particle size magnesium ethylate
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The invention relates to a preparation method of large-particle size magnesium ethylate, and belongs to the technical field of metallic oxide preparation. The preparation method of large-particle size magnesium ethylate includes the steps that in a reactor with inert gas shielding, ethyl alcohol and magnesium metal are reacted under the action of a catalyst containing succinyl amino cobalt phthalocyanine and a halogen compound, wherein the halogen compound is prepared from iodine, magnesium bromide and calcium bromide at the mass ratio of 1:1:0.1; the reaction temperature is controlled to be 52-60 DEG C, materials are added in batches, and vacuum drying is carried out when the reaction reaches the end point. Obtained magnesium ethylate has good spherical stereoregularity, and the particle size is 150 micrometers or so. Magnesium ethylate prepared with the method is especially suitable for serving as a precursor of an olefin polymerization catalyst in the petrochemical industry.
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Paragraph 0018-0019
(2017/06/23)
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- METHOD FOR PRODUCING MAGNESIUM ALCOHOLATE
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The purpose of the present invention is to provide a spherical or ellipsoidal magnesium alcoholate having a narrow particle size distribution even when the particle size is small. The present invention provides a method for producing a magnesium alcoholate by adding in a portionwise manner to a reaction system and reacting, metallic magnesium, an alcohol, and at least one of a halogen or a halogen atom-containing compound in the reaction system under alcohol reflux, which is a method for producing a magnesium alcoholate characterized in that a mixture of metallic magnesium, an alcohol, and at least one of a halogen or a halogen atom-containing compound is added to the reaction system at each portionwise addition.
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Paragraph 0048; 0049
(2014/07/23)
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- MIXED MAGNESIUM DIALKOXIDE PARTICULATE, METHOD FOR SYNTHESIZING SAME, AND METHOD FOR USE THEREOF
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A mixed magnesium dialkoxide particulate obtained by direct solid-liquid reaction between particulate magnesium metal with a mean particle size of 50 μm to 500 μm and two or more alcohols including ethyl alcohol and at least one C3-6 alcohol, and comprising magnesium diethoxide, wherein the content of alkoxides other than ethoxide is 2.5 to 15 mol% of the total, the mean particle size (D50) is 20 to 100 μm and the bulk density is at least 0.4 g/ml. The mixed magnesium dialkoxide is for use as a catalyst component for polymerization of olefins such as propylene, exhibits high breaking strength, and when used for preparation of a polymerization catalyst, high polymerization activity is exhibited resulting in a high catalyst product yield.
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Page/Page column 5-6
(2013/02/28)
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- METHOD FOR CONTROLLING SIZE OF SPHERICAL CARRIER FOR OLEFIN POLYMERIZATION CATALYST
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Provided is a method for controlling the size of a dialkoxy magnesium carrier used in preparation of an olefin polymerization catalyst. Specifically, provided is a method for controlling the size of a dialkoxy magnesium carrier for preparation of an olefin polymerization catalyst which includes preparation of a dialkoxy magnesium carrier by reacting metal magnesium with an alcohol in the presence of an reaction initiator such as magnesium halide or nitrogen halide, by adding the metal magnesium and the alcohol to the reaction in divided portion(s) of 1-3.
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Page/Page column 4
(2011/07/29)
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- METHOD OF PRODUCING DIALKOXYMAGNESIUM SUPPORT FOR CATALYST FOR OLEFIN POLYMERIZATION, METHOD OF PRODUCING CATALYST FOR OLEFIN POLYMERIZATION USING THE SAME AND METHOD OF POLYMERIZING OLEFIN USING THE SAME
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Disclosed are a method for producing a dialkoxymagnesium support for catalyst for olefin polymerization, a method of producing catalyst for olefin polymerization using the dialkoxymagnesium support and a method of polymerizing olefin using the catalyst. By using the method for producing a support according to the present invention, the content of large particles in the dialkoxymagnesium support can be controlled and the particle can have spherical shape, so the catalyst produced by using the support have high activity and stereoregularity, and high bulk density, thereby making it possible to be applied to the commercial processes.
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Page/Page column 5
(2010/12/29)
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- Activated Alkaline Earth Metal, In Particular Magnesium, For The Preparation Of Organoalkaline Earth Metal Compounds
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The invention relates to an activated alkaline earth metal, to a method for its production and the use of the activated alkaline earth metal for the preparation of Grignard compounds and organoalkaline earth metal compounds.
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Page/Page column 3
(2009/05/28)
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- DIALKOXYMAGNESIUM GRANULAR MATERIAL AND METHOD FOR SYNTHESIS OF THE SAME
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Dialkoxymagnesium granules having spherical or ellipsoidal particle shapes with a mean particle size, represented by D50, in the range of 60-200 μm, a bulk specific gravity of 0.2-0.7 g/ml, having numerous interior pores with pore sizes of 0.1-5 μm as observed with a TEM, and having a particle size distribution, represented by (D90-D10)/D50, of no greater than 1. Granular metallic magnesium and an alcohol are added continuously or intermittently in divided portions to a reaction system of the metallic magnesium and alcohol while circulating the alcohol for reaction. Large-sized dialkoxymagnesium granules are obtained with a uniform particle size distribution and containing no fine powder.
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Page/Page column 8-12
(2009/01/24)
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- Diaminopyrimidines as P2X3 and P2X2/3 modulators
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Compounds of the formula I: or pharmaceutically acceptable salts thereof, wherein A, D, E, G, J, X, Y, Z R6, R7 and R8 are as defined herein. Also provided are methods of using the compounds for treating diseases mediated by a P2X3 and/or a P2X2/3 receptor antagonist and methods of making the compounds.
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Page/Page column 23
(2010/11/26)
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- Process for the preparation of pure alkaline earth alkoxides
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Production of metal-free, alkoxide-pure alkaline earth alkoxides involves use of an excess of an alcohol to effect alcoholytic alkoxide group exchange in solutions of optionally mixed alkoxides having shorter alkyl chains than the final product, the optionally mixed alkoxides being at least proportionately dissolved during the reaction. Production of metal-free, alkoxide-pure alkaline earth alkoxides of formula (I) involves alcoholysis of a solution of an optionally mixed alkoxide of formula (II) with an excess of an alcohol of formula (III), compound (II) being at least proportionately dissolved during the reaction. M(OR 1>) 2(I) M(OR 2>) x(OR 3>) y(OR 4>) z(II) HOR 1>(III) M : main Group II element; R 1>linear or cyclic 2-20C alkyl in (I) but is different from R 2>- R 4>in (II) in having at least one more carbon atom in the alkyl chain than the longest chain in R 2>- R 4>; R 2>- R 4>1-4C alkyl; and x, y and z : 0-2, with x + y + z = 2.
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Page/Page column 7
(2008/06/13)
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- MAGNESIUM COMPOUND, SOLID CATALYST COMPONENT FOR OLEFIN POLYMERIZATION, CATALYST FOR OLEFIN POLYMERIZATION AND METHOD FOR PRODUCING POLYOLEFIN
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A magnesium compound obtained by reacting metallic magnesium having a sphericity (S) of less than 4.00, the sphericity (S) being represented by the following formula (I), an alcohol, and a halogen and/or a halogen-containing compound containing halogen atoms in an amount of 0.0001 gram atom or more relative to one gram atom of the metallic magnesium,S = (L/L) ???wherein L1 represents the maximum diameter of projection views of metallic magnesium determined by photographing with a scanning electron microscope and thereafter an image processing, and L2 represents a diameter of a circle having an area equal to the area of the projection view of metallic magnesium. A solid catalyst component is obtained from the magnesium compound and a titanium compound, and a catalyst for olefin polymerization is obtained using the solid catalyst component.
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Page/Page column 16
(2010/02/10)
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- COMBINATION OF MGLUR2 ANTAGONIST AND ACHE INHIBITOR FOR TREATMENT OF ACUTE AND/OR CHRONIC NEUROLOGICAL DISORDERS
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The present invention relates to a method of treatment or prevention of acute and/or chronic neurological disorders, to a pharmaceutical composition comprising an inhibitor of acetylcholinesterase (AChE inhibitor) and a metabotropic Glutamate receptor 2 antagonist (mGluR2 antagonist), to the use of an AChE inhibitor and a mGluR2 antagonist in the preparation of a medicament, and. to kits comprising an AChE inhibitor and a mGluR2 antagonist.
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Page/Page column 40-41
(2008/06/13)
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- Preparation of octa(alkoxy) azaphthalocyanines
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5,6-Bis(alkoxy)pyrazine-2,3-dicarbonitriles 3, with methoxy-, ethoxy-and propoxy-substituents, were allowed to react with magnesium alkoxides to form the corresponding magnesium octa(alkoxy)azaphthalocyanines 5a,d,e. Compound 5a was converted into the metal-free azaphthalocyanine 5b, and to the copper complex 5c. The propoxy substituted magnesium azaphthalocyanine 5e was converted to the metal free azaphthalocyanine 5f. Both 5e and 5f are readily soluble in organic solvents. The stable intermediate methyl 2,3-di(methoxy)-6-cyanopyrazine-5-carboximidate 4, was obtained both from a reaction of 5,6-dichloropyrazine-2,3-dicarbonitrile 1, with sodium methoxide in methanol, and in a sodium methoxide catalyzed reaction of 3a with ammonia in methanol. Compound 4 was converted into 5a with magnesium methoxide, and is therefore an intermediate between 3a and 5a.
- Morkved, Eva H.,Ossletten, Hege,Kjosen, Helge
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p. 1117 - 1121
(2007/10/03)
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- Synthesis of benzyl/allyl alkyl ethers from corresponding magnesium alkoxides
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In the presence of iodine, alcohols react with magnesium to produce magnesium alkoxides which are then treated with benzyl chloride or allyl bromide to produce benzyl alkyl ethers or allyl alkyl ethers.
- Lin, Ji-Mao,Li, Hui-Hui,Zhou, Ai-Min
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p. 5159 - 5160
(2007/10/03)
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- Novel halide-arylalkoxy-containing magnesium compounds
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Halide arylalkoxy-containing compounds of the formula ROMgX, where X is halide (e.g., chloride) and R is aralkyl (e.g., benzyl) are hydrocarbon soluble.
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- Catalyst component for polymerization of olefins
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A titanium halide containing catalyst component for polymerization of olefins which is prepared by reacting a magnesium hydrocarbyloxide with a silicon compound having a hydrogen-silicon bond, contacting the reaction product with an electron donor compound, contacting the resulting contact product two or more times with a titanium halide and between one of the multiple titanium halide contacts, contacting the titanium halide contacted solid with a halogenated hydrocarbon.
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- Method for preparing 4-hydroxy-3-methyl-2-(2-propynyl)-2-cyclopentenolone
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The present invention relates to a novel method for producing cyclopentenolone of the formula (I), STR1 which is a useful intermediate for producing agricultural chemicals, which comprises reacting an acetonedicarboxylic ester of the formula (VII), STR2 wherein R is a C1 -C6 alkyl group, with 2-propynyl chloride in the presence of magnesium alkoxide and in the presence of alkali iodide to obtain novel mono-(2-propynyl)-substituted acetonedicarboxylic ester of the formula (VI), STR3 wherein R is as defined above; hydrolyzing the mono-(2-propynyl)-substituted acetonedicarboxylic ester of the formula (VI) under alkaline conditions with an alkali and then reacting the hydrolyzed product with methylglyoxal of the formula, STR4 to obtain novel γ-diketone of the formula (V), STR5 and ring-closing the γ-diketone of the formula (V) under alkaline condition.
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- Process for extracting bitter flavoring principles from hops
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A process is described for converting the α- and β-acids of hops into the iso-α acids for use as a bitter flavoring principle ingredient for beers. The α-acids content of the hops is directly isomerized to the iso-α-acid, the bitter principle ingredient. The β acids in the hops extract is transformed to the α acid either after a direct separation step before the α-acid isomerization or the residual β-acids, after the isomerization, are then transformed and the resultant α-acid is isomerized. The β-acid transformation results from a radiation activation followed by an oxidation step with a per - acid. The isomerization of the α-acid to the iso-α-acid is accomplished by reaction with an alkaline earth metal ethoxide preferably the magnesium ethoxide.
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- Fused pyrimidine derivatives and compositions for treating atherosclerosis containing them
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Compounds of the formula: STR1 or pharmaceutically acceptable salts thereof are disclosed wherein R is hydrogen or C1 to C6 alkyl; R2 and R3 are each hydrogen or together form a valency bond; R6 is carboxy or C1 to C6 alkoxycarbonyl; R7 and R8 are each hydrogen or together form a valency bond; R10 is carboxy or C1 to C6 alkoxycarbonyl and the dotted line represents two hydrogen atoms or a valency bond. The compounds are useful in the treatment of atherosclerosis.
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