CAS: 43238-07-9; Scandium

专利信息

专利号:US-11926589-B2
优先权日:2019-07-09
标 题 :Process for the synthesis of non-racemic cyclohexenes
发明人：REISMAN SARAH; ROMBOLA MICHAEL; LADD CAROLYN L; MCLAUGHLIN MARTIN JOHN; ZUEND STEPHAN; GOETZ ROLAND
权利人:BASF CORP; CALIFORNIA INST OF TECHN
摘要:This invention relates to a process for the synthesis of a non-racemic cyclohexene compound of formula (I) by a Diels-Alder reaction of a compound of formula (II) with a compound of formula (III) wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and Y have the meanings as defined in the description in the presence of a catalyst comprising at least one m-valent metal cation M m+ wherein the metal M is selected from Scandium (Sc), Yttrium (Y), Lanthanum (La), Cerium (Ce), Praseodymium (Pr), Neodymium (Nd), Promethium (Pm), Samarium (Sm), Europium (Eu), Gadolinium 15 (Gd), Terbium (Tb), Dysprosium (Dy), Holmium (Ho), Erbium (Er), Thulium (Tm), Ytterbium (Yb), Lutetium (Lu), Gallium (Ga) and Indium (In), and m is an integer of 1, 2 or 3, and a chiral ligand of the formula (IV) wherein R 10a , R 10b , R 10c , R 10d , R 10a′ , R 10b′ , R 10c′ , R 10d′ , Z and Z′ have the meanings as defined in the description.

专利号:WO-2025037328-A1
优先权日:2023-08-11
标题:A method for synthesis of rare-earth oxychloride and production of rare-earth metal/alloy
发明人：BORRA PROF CHENNA RAO; LAKSHMI BORRA VENKATA; JANA DR PRASANTA; ROUT SONALI
权利人:INDIAN INSTITUTE OF TECH KHARAGPUR
摘要:The present disclosure relates to a method for external synthesis of rare-earth oxychloride and production of rare-earth metal or alloy. The method comprises the steps of adding hydrochloric acid (HCl) to a portion of a pre-defined weight of rare-earth oxide (RE2O3) converting the portion of RE2O3 to rare-earth chloride hydrate (RECl3.xH2O). The method further comprises mixing the residual rare-earth oxide (RE2O3) with the RECl3.xH2O and heating the mixture to a temperature exceeding 300℃ to obtain rare-earth oxychloride (REOCl). The method includes making the obtained REOCl to react directly with a reductant or mixture of reductant and alloying element in a temperature of 600℃ - 1400℃ for reducing the rare-earth oxychloride (REOCl) to rare-earth metal or alloy; and upon cooling, treating the reduced mass of rare-earth metal or alloy with water and dilute acid to remove reaction byproducts such as calcium chloride (CaCl2) and calcium oxide (CaO).

专利号:US-2025023061-A1
优先权日:2021-11-17
标题 :Method for the synthesis of a metal catalyst surrounded with a carbon matrix
发明人：CHATENET MARIAN; DOAN HUONG; SGARBI RICARDO
权利人:INST POLYTECHNIQUE GRENOBLE; UNIV GRENOBLE ALPES; CENTRE NAT RECH SCIENT; UNIV SAVOIE MONT BLANC
摘要:A method for a synthesis of a metal catalyst, including providing at least one metal complex including a metal ion and a non-chelating complexing agent having carbon, the complex having a decomposition temperature, and performing a pyrolysis of the complex at a temperature greater than or equal to a decomposition temperature of the complex, whereby inducing a formation of nanoparticles surrounded by a carbon matrix to form the catalyst. Thanks to the carbon matrix, the catalysts provided herein can be corrosion resistant, self-healing, more cost-effective, and can have higher catalytic activity. The synthesis of the catalyst and its properties can furthermore be improved compared to catalysts formed from a complex including a chelating.

专利号:US-11498985-B2
优先权日:2017-04-18
标题:Continuous synthesis of an ethylene and butadiene copolymer
发明人：THUILLIEZ JULIEN; PACHECO NUNO
权利人:MICHELIN & CIE
摘要:A process for the synthesis of an ethylene/butadiene copolymer is provided. The process is continuous and comprises the following steps:n a. feeding at least one stirred polymerization reactor with a mixture of ethylene, butadiene, hydrocarbon-based solvent and catalytic system allowing the formation of cyclic trans-1,2-cyclohexane units in the polymer chain with a mole ratio of ethylene to the sum of the ethylene and butadiene monomers ranging from 0.5 to 0.99; the concentration of ethylene and butadiene monomers in the polymerization reaction medium being less than 15% by weight; the operating pressure of the reactor is greater than or equal to the saturated vapour pressure of the polymerization reaction medium; and the polymerization temperature is greater than 90° C.; b. recovering the ethylene/butadiene copolymer, this copolymer comprising, statistically distributed, ethylene units, butadiene units and trans-1,2-cyclohexane units, the molar fraction of ethylene units in the copolymer being greater than or equal to 50%.

专利号:US-10973847-B2
优先权日:2017-06-30
标题 :Core-to-surface polymerization for the synthesis of star polymers and uses thereof
发明人：JOHNSON JEREMIAH A; GOLDER MATTHEW R
权利人:MASSACHUSETTS INST TECHNOLOGY
摘要:Disclosed are methods, compositions, reagents, systems, and kits to prepare star polymers, as well as compositions and uses thereof. Various embodiments show that synthesis of these polymers contain low metal concentration to provide polymers for diverse biomedical applications including in vivo applications.

专利号:US-11136422-B2
优先权日:2017-04-18
标题:Continuous synthesis of an ethylene and butadiene copolymer
发明人：THUILLIEZ JULIEN; PACHECO NUNO
权利人:MICHELIN & CIE
摘要:A process for the synthesis of an ethylene/butadiene copolymer is provided. The process is continuous and comprises: n a. feeding at least one stirred polymerization reactor with a mixture of ethylene, butadiene, hydrocarbon-based solvent and catalytic system allowing the formation of cyclic trans-1,2-cyclohexane units in the polymer chain with a mole ratio of ethylene to the sum of the ethylene and butadiene monomers ranging from 0.5 to 0.99; the concentration of ethylene and butadiene monomers in the polymerization reaction medium being at least 10% by weight relative to the total weight; the operating pressure of the reactor is greater than or equal to the saturated vapour pressure of the polymerization reaction medium; n b. recovering the ethylene/butadiene copolymer, this copolymer comprising, statistically distributed, ethylene units, butadiene units and trans-1,2-cyclohexane units, the molar fraction of ethylene units in the copolymer being greater than or equal to 50%.