CAS: 10025-84-0; Lanthanum(Iii) Chloride Heptahydrate

上下游产品

hydrogenchloride lanthanum(III) chloride hexahydrate water lanthanum(III) chloride heptahydratelanthanum hexaboride lanthanum ethyl sulfate lanthanum chloride hydrate

专利信息

专利号:US-5336653-A
优先权日:1992-11-03
标题 :Catalyst for asymmetric synthesis
发明人：SHIBASAKI MASAKATSU; SASAI HIROAKI
权利人:CHISSO CORP
摘要:The present invention provides a catalyst for asymmetric synthesis prepared from a dialkali metal salt of an optically active 2,2'-dihydroxy-1,1'-binaphthyl represented by the formula (IR) (IR) or the formula (IS) (IS) (wherein M is Li, K or Na), a lanthanum compound represented by LaX3 (X is F, Cl, Br, I, NO3 or CH3CO2) and an alkali metal alkoxide or an alkali metal hydroxide represented by MOR or MOH (M is Li, K or Na, and R is isopropyl or t-butyl), respectively, in the presence of a water-containing solvent. The catalyst of the present invention is extremely valuable as a catalyst for asymmetric synthesis of an asymmetric nitroaldol reaction useful in the synthesis of a beta -hydroxynitro compound which is an important synthetic raw material for an optically active compound such as a medicine.

专利号:US-11643333-B2
优先权日:2018-10-23
标题 :High surface area crystalline metal aluminates and a method of manufacture thereof at lower temperature
发明人：JARONIEC MIETEK; GONCALVES ALEXANDRE A S
权利人:UNIV KENT STATE OHIO
摘要:Sintering is an important issue in creating crystalline metal oxides with high porosity and surface area, especially in the case of high-temperature materials such as metal aluminates. Herein we report a rationally designed synthesis of metal aluminates that diminishes the surface area loss due to sintering. Metal aluminate (e.g. MeAl2O4or MeAlO3−Me=Mg, Mn, Fe, Ni, Co, Cu, La, or Ce; or mixture thereof) supported on γ-Al2O3 with ultralarge mesopores (up to 30 nm) was synthesized through microwave-assisted peptization of boehmite nanoparticles and their self-assembly in the presence of a triblock copolymer (Pluronic P123) and metal nitrates, followed by co-condensation and thermal treatment. The resulting materials showed the surface area up to about 410 m2·g−1, porosity up to about 2.5 cm3·g−1, and very good thermal stability. The observed enhancement in their thermomechanical resistance is associated with the faster formation of the metal aluminate phases. The nanometer scale path diffusion and highly defective interface of γ-alumina facilitate the counter diffusion of MeX+ and Al3+ species and further formation of the metal aluminate phase.

专利号:US-2015059818-A1
优先权日:2013-08-29
标题 :METHOD OF PRODUCING FILM OF SURFACE Nb-CONTAINING La-STO CUBIC CRYSTAL PARTICLES
发明人：KOUMOTO KUNIHITO; DANG FENG; PARK NAM-HEE; WAN CHUNLEI; TSURUTA KAZUKI
权利人:UNIV NAGOYA NAT UNIV CORP
摘要:There are provided a film of surface Nb-containing La-STO cubic crystal particles that is effective as, for example, a thermoelectric conversion material for use at low temperatures of around room temperature, and an art for producing this film. The production method includes preparing a mixed aqueous solution in which an La-containing compound, an Sr-containing compound, a six-fold coordinated Ti complex compound, and an amphiphilic compound are dissolved; growing cubic-form crystals formed of La-doped STO in the mixed aqueous solution by a hydrothermal synthesis method; obtaining surface Nb-containing La-STO cubic crystal particles by dissolving a niobium-containing compound in this mixed solution and heating; and forming a particle film in which the surface Nb-containing La-STO cubic crystal particles are bonded, by disposing the surface Nb-containing La-STO cubic crystal particles on a substrate and carrying out firing.

专利号:US-5278337-A
优先权日:1992-10-14
标 题:Enantiomeric resolution of aryl-substituted aliphatic carboxylic acids
发明人：MANIMARAN THANIKAVELU; STAHLY G PATRICK; HERNDON JR R CARL
权利人:ETHYL CORP
摘要:A process for obtaining a substantially pure enantiomer of an aryl-substituted aliphatic carboxylic acid is described. The process utilizes first an enantiomerically enriched mixture the of aryl-substituted aliphatic carboxylic acid obtained from kinetic resolution, diastereomeric crystallization or asymmetric synthesis processes. This enriched mixture is reacted with a base producing a salt that has the following properties: n 1) has at least one eutectic point; n 2) a composition that is not at the eutectic point; and n 3) a eutectic composition that is closer to the racemic composition than is the eutectic composition of said aryl-substituted carboxylic acid. n Substantially pure, enantiomeric salt is separated, leaving a mother liquor comprising the solvent and aryl-substituted aliphatic carboxylic acid enriched in the other enantiomer.

专利号:CN-117947461-A
优先权日:2024-01-24
标 题 :Preparation method, structure and application of ultrafine precious metal nanoparticles modified by low-temperature heat treatment synthesis of non-precious metal oxides

专利号:WO-2007074391-A2
优先权日:2005-12-28
标题:Preparation of a key intermediate in the synthesis of rosuvastatin