CAS: 21679-31-2; Chromium(Iii) Acetylacetonate

Sodioacetylacetone 反应生成 Chromium(III) Acetylacetonate
参考文献:Makhaew W. D.,Borisow A. P.,Aleshin W. W.,Petrowa L. A.,Isw. An. Ser. Khim,(1995) N 6,S 1150-1152
标题:Makhaew W. D.,Borisow A. P.,Aleshin W. W.,Petrowa L. A.,Isw. An. Ser. Khim,(1995) N 6,S 1150-1152

专利信息

专利号:US-6479685-B2
优先权日:1998-01-09
标题 :Metallocene catalysts for synthesis of high-melting polyolefin copolymer elastomers
发明人：WAYMOUTH ROBERT M; KRAVCHENKO RAISA L; MACIEJEWSKI PETOFF JENNIFER; HUNG JOYCE
权利人:TRUSTEES OF THE LELAND STANDAR
摘要:Metallocene catalysts having plural coordination geometries for synthesis of high melting polyolefin copolymers suitable as thermoplastic elastomers. The inventive catalysts comprise unbridged, substituted or unsubstituted cyclopentadienyl metallocene catalysts that are capable of inter-converting between states with different polymerization or copolymerization characteristics, which interconversion is controlled by selecting the substituents of the cyclopentadienyl ligands so that the rate of interconversion of the two states is within several orders of magnitude of the rate of formation of a single polymer chain. Where r i >r f the polymer can be characterized as multiblock; where r i
专利号:US-5166110-A
优先权日:1989-12-22
标 题 :Process for the synthesis of ziegler-type catalytic solids or solid constituents of the same
发明人：BRUN CLAUDE
权利人:ATOCHEM ELF SA
摘要:A process is provided for the synthesis of a solid Ziegler catalyst or of a transition metal solid constituent thereof, which entails preparing the solid catalyst or constituent thereof as a suspension in an inert liquid medium by contacting precursors or ingredients of the catalyst or of the constituent in the inert liquid medium in one or more steps, and drying the suspension, and collecting the catalyst or constituent thereof; and wherein the process is conducted in a single multi-function reactor having a longitudinal axis and which can pivot around an axis which intersects perpendicularly with this axis.

专利号:US-2024327997-A1
优先权日:2023-03-28
标题 :Electrocatalytic Conversion of Nitrates and Nitrites to Ammonia
发明人：ATANASSOV PLAMEN; MURPHY EAMONN; LIU YUANCHAO; SPOERKE ERIK DAVID
权利人:NAT TECH & ENG SOLUTIONS SANDIA LLC; UNIV CALIFORNIA
摘要:Electrocatalytic reduction of waste nitrates (NO3−) enables the synthesis of ammonia (NH3) in a carbon neutral and decentralized manner. The present invention uses atomically dispersed transition metal-nitrogen-carbon (M-N—C) catalysts with varying metal centers to uniquely favor mono-nitrogen products (e.g., NH3) via the electrochemical nitrate reduction reaction (NO3RR).

专利号:US-7348395-B2
优先权日:2003-12-15
标 题:Synthesis of oligomeric cyanate esters
发明人：KELLER TEDDY M; LASKOSKI MATTHEW
权利人:US NAVY
摘要:A cyanate ester system is disclosed. An aryl ether oligomer may be made from a dihydroxyaromatic compound and a dihaloaromatic compound in the presence of a base. The oligomer is then reacted with a cyanide compound in the presence of a base to form the cyanate ester shown below. The cyanate ester may then be cross-linked to a thermoset having triazine ring cross-links.n nHO—Ar 2 O—Ar 1 —O—Ar 2 n OH

专利号:US-7338647-B2
优先权日:2004-05-20
标 题:Synthesis of cathode active materials
发明人：HUANG BIYING; SWOYER JEFFREY; SAIDI M YAZID; HUANG HAITAO
权利人:VALENCE TECHNOLOGY INC
摘要:The present invention relates to a method for preparing an electroactive metal polyanion or a mixed metal polyanion comprising forming a slurry comprising a polymeric material, a solvent, a polyanion source or alkali metal polyanion source and at least one metal ion source; heating said slurry at a temperature and for a time sufficient to remove the solvent and form an essentially dried mixture; and heating said mixture at a temperature and for a time sufficient to produce an electroactive metal polyanion or electroactive mixed metal polyanion. In an alternative embodiment the present invention relates to a method for preparing a metal polyanion or a mixed metal polyanion which comprises mixing a polymeric material with a polyanion source or alternatively an alkali metal polyanion source and a source of at least one metal ion to produce a fine mixture and heating the mixture to a temperature higher than the melting point of the polymeric material, milling the resulting material and then heating the milled material. It is another object of the invention to provide electrochemically active materials produced by said methods. The electrochemically active materials so produced are useful in making electrodes and batteries.

专利号:US-5162592-A
优先权日:1991-11-25
标题:One-step synthesis of methyl t-butyl ether from t-butanol using multimetal-modified zeolite catalysts
发明人：KNIFTON JOHN F; SANDERSON JOHN R; DAI PEISHING E
权利人:TEXACO CHEMICAL
摘要:Disclosed is an improved process for preparing methyl t-butyl ether in one step which comprises reacting tertiary butanol and methanol in the presence of a catalyst comprising a zeolite modified with a metal selected from the group consisting of Groups IB, VB, VIB, VIIB or VIII of the Periodic Table at a temperature of about 20° C. to 250° C. and atmospheric pressure to about 1000 psig, wherein when the temperature is in the operating range above about 160° C., the product comprises a two-phase mix of an isobutylene-MTBE product-rich phase and a heavier aqueous methanol-rich phase.