CAS: 7440-58-6; Hafnium Atom

专利信息

专利号:US-2006167289-A1
优先权日:2003-12-05
标题 :Practical, cost-effective synthesis of ubiquinones
发明人：LIPSHUTZ BRUCE H; BERL VOLKER; SCHEIN KARIN; WETTERICH FRANK
权利人:ZYMES LLC
摘要:The present invention provides a convergent method for the synthesis of ubiquinones and ubiquinone analogues. Also provided are precursors of ubiquinones and their analogues that are useful in the methods of the invention. The invention further provides an improved method for the carboalumination of alkyne substrates.

专利号:US-11655264-B2
优先权日:2015-11-25
标题:Metallocene compounds, and preparation and use thereof for synthesis of poly-alpha-olefins as lubricating base oil
发明人：WEI DONGCHU; LI BING
权利人:APALENE TECH CO LTD JIAXING
摘要:The present invention relates to a metallocene compound, and preparation and use thereof, and the compound can be used as a catalyst for synthesis of poly-α-olefin as lubricating base oil. The metallocene compound includes a substituted aryl group, a bridged atom, an optionally unsubstituted, 3-mono-substituted or 3,6-disubstituted 5H-indeno [1,2-b] pyridyl group or optionally unsubstituted, 3-mono-substituted or 3,6-disubstituted 5H-indeno [1,2-b] thiopyranyl group, and a metal coordination group. As a catalyst, the metallocene compound is shown to be structurally stable and high in catalytic efficiency, and the preparation of the catalyst is relatively easy in operation, high in yield, low in cost, low in pollution and easy to scale up for industrial production.

专利号:US-9944532-B2
优先权日:2013-10-22
标 题 :Solid source and method for the synthesis of silicon-containing precursors for chemical vapor deposition
发明人：SCARLETE MIHAI; AKTIK CETIN
权利人:SOCPRA SCIENCE ET GENIE S E C; UNIV DE BISHOP; SOCPRA SCIENCE ET GENIE S E C
摘要:The present document described a solid source and a method for synthesis of silicon-containing precursors for chemical vapor deposition. The solid source comprises a solid polysilane; an energy coupling agent distributed in the solid polysilane; and hydrogen, mixed with the solid polysilane and the energy coupling agent distributed in the solid polysilane, in a necessary amount to satisfy a hydrogen deficiency during a hydrogenolysis reaction.

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-6479599-B1
优先权日:1997-04-04
标题:Catalyst system for high yield synthesis of polyolefins
发明人：PEIL KEVIN P; WILSON DAVID R
权利人:BP CHEM INT LTD
摘要:This invention relates to a supported metallocene catalyst system for the high yield synthesis of polyolefins, to methods of preparation of the catalyst system, to polymerization processes which use the catalyst system and to polyolefin polymers produced by the polymerization processes.

专利号:US-6395894-B2
优先权日:1998-04-16
标 题 :Process for the synthesis of carbapenem intermidiates, and compounds produced
发明人：PYE PHILIP J; REIDER PAUL J; ROSSEN KAI; VOLANTE RALPH P
摘要:A process of synthesizing a compound of structural formula 6is disclosed wherein R1 represents H or a suitable protecting group for an alcohol; R2 represents a benzyl, C1-6 alkyl or aryl; Y represents C1-3 alkyl, O, NH or S; X represents O, NH, or S and R5 represents a carboxy protecting group, comprising reacting a compound of formula 5:wherein R1, R2, R5, X and Y are as previously described with a phosphite or phosphonite reagent to produce a compound of formula 6. Further disclosed is an efficient method for the synthesis of a compound of formula 2:which comprises reacting a 4-acyl-2-azetidinone with a titanium, zirconium or hafnium enolate of a 1-hydroxy-2-butanone derivative.