CAS: 2914-19-4; Barium(2+),Ethanolate

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CAS号7440-39-3 钡 | CAS号2122-70-5 2-(1-萘基)乙酸乙酯

专利信息

专利号:US-5342809-A
优先权日:1992-04-08
标 题:Process for the synthesis of fluoride glass by the sol - gel method and optical fibre produced from the fluoride glass obtained according to this process
发明人：POULAIN MARCEL; SAAD MOHAMMED
权利人:FRANCE TELECOM
摘要:The present invention relates to a process for the synthesis of fluoride glass by the sol-gel method. The object of the invention is to synthesize an impurity-free fluoride glass. This object is achieved with the aid of a process having stages consisting of preparing a wet oxygenated gel from precursors containing all the cations constituting said fluoride glass, hydrolyzing said gel, drying said gel and in which the process is characterized in that it also comprises the stage consisting of treating said oxygenated gel by a fluorinating agent in the vapour phase, at a temperature below the glass crystallization point. This process more particularly makes it possible to produce fluoride glass for optical fibres.

专利号:WO-2011116933-A1
优先权日:2010-03-24
标 题 :Process for the preparation of 2-substituted 4-amino-5-cyanopyrimidines
发明人：DICK VIKTOR; HANSELMANN PAUL; KRAMER RAINER; LADNAK VIKTOR
权利人:LONZA AG; DICK VIKTOR; HANSELMANN PAUL; KRAMER RAINER; LADNAK VIKTOR
摘要:A compound of the formula (I), wherein R 1 is C 1-4 alkyl or phenyl, is prepared by reacting a dicyanomethanide of the formula: M r n + [CH(CN) 2 ] rÌ… n (II), wherein M is an alkali or alkaline earth metal and r is 1 or 2, with carbon monoxide to obtain a dicyanoethenolate of the formula: M r n + [(NC) 2 C=CH–O] rÌ… (III), which is acylated to obtain an acyloxymethylenemalononitrile of the formula: (NC) 2 C=CH–OCOR 2 (IV), wherein R 2 is C 1-4 alkyl, which in turn is reacted with an amidine of the formula (V) to obtain the 4-amino-5-cyanopyrimidine of the formula (I). The compound of formula (I), wherein R is methyl, is an intermediate in a synthesis of thiamin (vitamin B 1 ).

专利号:US-11964260-B2
优先权日:2016-08-08
标题:Method for manufacturing ammonia synthesis catalyst, and method for manufacturing ammonia
发明人：HOSONO HIDEO; KITANO MASAAKI; YOKOYAMA TOSHIHARU; LI JIANG; KAWAMURA SHIGEKI; KISHIDA Kazuhisa
权利人:TOKYO INST TECH; TSUBAME BHB CO LTD
摘要:Provided is a method for manufacturing a catalyst with which it is possible to obtain a supported metal ammonia synthesis catalyst, in which there are restrictions in terms of producing method and producing facility, and particularly large restrictions for industrial-scale producing, in a more simple manner and so that the obtained catalyst has a high activity. This method for manufacturing an ammonia synthesis catalyst includes: a first step for preparing 12CaO·7Al 2 O 3 having a specific surface area of 5 m 2 /g or above; a second step for supporting a ruthenium compound on the 12CaO·7Al 2 O 3 ; and a third step for performing a reduction process on the 12CaO·7Al 2 O 3 supporting the ruthenium compound, obtained in the second step. This invention is characterized in that the reduction process is performed until the average particle diameter of the ruthenium after the reduction process has increased by at least 15% in relation to the average particle diameter of the ruthenium before the reduction process.

专利号:US-5629394-A
优先权日:1992-12-17
标 题 :Direct synthesis by living cationic polymerization of nitrogen-containing polymers
发明人：CHERADAME HERVE M; CHEN FRANK J; STANAT JON E R; NGUYEN HUNG A; TABAR BEHROOZ R
权利人:EXXON CHEMICAL PATENTS INC
摘要:A method is provided for the direct synthesis by living cationic polymerization of novel polymeric materials functionalized with desirable nitrogen-containing functional groups such as terminal azido, cyano, carbonylamino, cyanato, thiocyanato or thiocarbonylamino groups. Polymerization and functionalization occur in a substantially simultaneous manner. All necessary reactants for the functionalization are present when polymerization is initiated. The nitrogen-containing functional group is provided as a part of a molecule having a release moiety which is preferably resonance stabilized or a tertiary alkyl type and which acts to aid the nitrogen-containing species in functioning as a leaving group.

专利号:WO-2025198684-A2
优先权日:2023-12-20
标题 :BaTiO3 NANOCRYSTALS AND NANOCOMPOSITES
发明人：SZYCHOWSKI BRIAN; GELLEN TOBIAS A; WIACEK ROBERT J; MONICKAM SELINA THOMAS; WILLIAMS ZEHRA SERPIL GONEN; FU GUOYI
权利人:PIXELLIGENT TECH LLC
摘要:The synthesis of barium titanate nanocrystals, the capping of barium titanate nanocrystals to disperse into solvents, including polar and nonpolar solvents, polyalphaolefins, lubricants, oils, and greases, monomers, oligomers, and polymers including acrylics, epoxies, siloxanes, and the preparation of nanocomposites of barium titanate in combination with these monomers, oligomers, and polymers. The barium titanate nanocrystals are monodispersed with sizes between 1-200 nm and have an ideal barium to titanium ratio. The nanocrystals of size greater than 80 nanometer can possess high dielectric constants and can be ideal candidates of ceramic conductors and RF sensors. Nanocomposites resulting from the barium titanate nanocrystals of size less than 40 nanometer in combination with the monomers, oligomers, and polymers can possess high refractive index, high transparency, low absorbance, and minimal change when exposed to heat or UV light.

专利号:EP-0565432-B1
优先权日:1992-04-08
标题:Process for the synthesis of fluoride glass by the sol-gel process and optical fiber of fluoride glass obtained by this process