- 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 0071-0072
(2019/12/02)
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- Method for removing iron impurities in alkoxy aluminum
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The invention discloses a method for removing iron impurities in alkoxy aluminum. The method comprises the steps that supporting electrolyte is added in an alcoholic solution of the alkoxy aluminum, an electrolyte is formed by mixing evenly, an aluminum electrode is inserted into the electrolyte as a cathode, an inert electrode is used as an anode, an electrolytic reaction is conducted at the temperature being +/-80 DEG C of the boiling point of an alcoholic solution of the alkoxy aluminum, and a high-purity alcoholic solution of the alkoxy aluminum is obtained after the reaction. According tothe method, an electrolytic method is used for removing the iron impurities in the alkoxy aluminum, operation is easy, and the effect is good.
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Paragraph 0038-0040; 0053; 0054
(2019/11/20)
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- Preparation method of aluminum alkoxide
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The invention discloses a preparation method of aluminum alkoxide. An excessive amount of Al-N alloy powder is added into alcohol with the number of carbon atoms being 1-8, a reaction is conducted for1-3 hours at room temperature, and aluminum alkoxide is obtained after solid and liquid are separated, wherein the Al-N alloy powder is prepared through a gas atomization mode, and prepared from theraw materials of aluminum and a small amount of alloy elements which can be repeatedly used. No catalyst is needed and no heating is needed in the preparation method, the reaction condition is mild, aluminum alkoxide can be generated in one step at room temperature, the preparation method is simple and efficient, and the cost is low; and meanwhile, the safety coefficient in the production and using processes is high, transportation and storage are facilitated. In addition, harmful substances containing mercury or iodine are not used in the preparation method, and no pollution is generated to the environment.
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Paragraph 0025; 0026; 0027
(2018/09/08)
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- The state of Al(III) in alcohol solutions of aluminum alkoxide as probed by 27Al and 13C NMR and small-angle X-ray scattering
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Solutions of aluminum alkoxides obtained by interaction of aluminum metal with methyl, ethyl, and isopropyl alcohols were studied by 27Al and 13C NMR and small-angle X-ray scattering. Alkoxides with a tetrahedral environment of aluminum prevail in methanol solutions, and those with an octahedral environment of aluminum predominate in ethanol solutions. In isopropyl alcohol at 293 K, polynuclear alkoxides with tetrahedral, octahedral, and pentacoordinated aluminum environments coexist. The structure of polynuclear complexes was refined by comparison of their calculated dimensions with small-angle X-ray scattering data.
- Fedotov,Molchanov,Zotov,Tuzikov
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p. 1621 - 1627
(2009/02/06)
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- Metal complexes containing diastereoisomers and enantiomers of o-phenylenebis(methylphenylarsine) and its phosphorus analogue. 3. Preparation and stereochemistry of octahedral bis(bidentate)dichlororuthenium(II) complexes
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A detailed investigation of the stereochemistry of cis- and trans-[RuCl2(bidentate)2] containing the diastereoisomers and enantiomers of o-phenylenebis(methylphenylarsine) and its phosphorus analogue has been undertaken. The trans complexes were prepared in high yield from the ligands and a prereduced form of commercial ruthenium(III) chloride in the presence of aqueous formaldehyde. The optically active, racemic, meso, syn, and anti forms of the trans-dichloro complexes were isolated for both ligands, and each of these was subsequently isomerized to the corresponding cis compound by reaction with triethylaluminum. The various diastereoisomeric cis-dichloro compounds were also separated and characterized. Whereas the trans-dichloro isomers were relatively inert, the cis complexes readily underwent stereospecific halogen substitution by iodide ions and carbon monoxide.
- Grocott, Stephen C.,Wild, Stanley Bruce
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p. 3526 - 3534
(2008/10/08)
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