专利号:US-9040444-B2 优先权日:2009-12-22 标 题:Semi continuous process for the synthesis of a catalyst for use in the manufacture of polyolefins 发明人:SINGALA KAMLESH; SINGH SAURABH; GUPTA VIRENDRAKUMAR 权利人:SINGALA KAMLESH; SINGH SAURABH; GUPTA VIRENDRAKUMAR; RELIANCE IND LTD 摘要:A semi-continuous process and system thereof, for the synthesis of a narrow particle size distribution Zeigler Natta procatalyst for use in the manufacture of polyolefins. The process comprises: (a) mixing a reaction mixture containing a titanium compound; (b) charging a first reactor with said reaction mixture; (c) removing excess reactants from said first reactor as a filtrate; (d) feeding said filtrate to at least one further reactor; and continuously removing excess reactants from said at least further reactor.
专利号:US-9605089-B2 优先权日:2010-07-12 标题 :Attrition resistant catalyst system for manufacture of polyolefins 发明人:GUPTA VIRENDRAKUMAR; SINGH SAURABH; JOSEPH JOMICHAN; SINGALA KAMLESH J; DESAI BHAVESH K 权利人:RELIANCE IND LTD 摘要:The present invention relates to regular shaped magnesium particles containing attrition resistant precursors and procatalysts thereof and processes for their synthesis and their use in the manufacture of polyolefins. More particularly, the present invention relates to a process for the synthesis of a said precursor particles which give highly active and improved surface area procatalysts for producing high bulk density polyolefin resins containing low fines and capable of incorporating high rubber content. In particular, the present invention relates to process for the synthesis of an attrition resistant precursors to prepare an attrition resistant Zeigler Natta procatalysts synthesized by using the precursors and to the polyolefin resin synthesized using the said procatalysts.
专利号:US-5665827-A 优先权日:1996-11-07 标 题:Synthesis of multiblock polymers using group IIA and IIB metal cyclic organometallic initiators 发明人:HALL JAMES E 权利人:BRIDGESTONE CORP 摘要:The invention is a practical process for anionically synthesizing multiblock polymers containing a plurality of blocks formed from polar and/or non-polar monomers by using a cyclic organometallic compound initiator that comprises a divalent metal atom and an organic moiety contained in a ring, preferably a cycloorganomagnesium initiator. Activation of the ring metallic atom results in anionic polymerization of the monomers by addition into the initiator ring at the bonds between the metallic atom and its two adjacent carbon atoms, the metallic atom acting as a bridge between the two living ends of the propagating chain. The active chain ends can be coupled or terminated.
专利号:US-2024182421-A1 优先权日:2021-03-19 标题 :Synthesis of endochin-like quinolones 发明人:RISCOE MICHAEL K; NILSEN AARON; JIN HAIHONG; POU SOVITJ; WINTER ROLF W; DODEAN ROZALIA ANA; LIEBMAN KATHERINE M 权利人:UNIV OREGON HEALTH & SCIENCE; US GOV VETERANS AFFAIRS 摘要:Described herein are new synthetic routes for production of Endochin-Like Quinolone (ELQ) compounds. Synthetic routes to 3-substituted 4(1H)-quinolones are presented that are amenable to industrial scale preparation. One herein presented approach is relatively short, does not require palladium, and involves no chromatographic separation. A second herein presented approach is similarly relatively short, does not require palladium, involves no chromatographic separation, and also avoids high vacuum distillation. Additionally, both approaches require no protecting group chemistry because the insoluble 4(1H)-quinolone is not formed until the final reaction step.
专利号:US-9845282-B1 优先权日:2016-08-12 标题 :Palladium catalyzed synthesis of ester compounds 发明人:EL ALI BASSAM M; IBRAHIM MANSUR B; SULEIMAN RAMI K 权利人:UNIV KING FAHD PET & MINERALS 摘要:A catalytic process for synthesizing an ester compound, and a catalytic process for synthesizing an amide compound, wherein a solid-supported palladium catalyst is used to catalyze an alkoxycarbonylation reaction of an aryl halide to form the ester compound, or to catalyze an aminocarbonylation reaction of an aryl halide to form the amide compound. Various embodiments of each of the processes are also provided.
专利号:US-7250559-B2 优先权日:2001-07-05 标 题:Nucleic acids encoding glucosinolate biosynthesis enzymes and methods of their use 发明人:QUIROS CARLOS; LI GENYI 权利人:UNIV CALIFORNIA 摘要:Provided are nucleic acid sequences from Brassica oleracea plants that encode enzymes involved in the synthesis of a glucosinolate molecule, including BoGSL-ALK, and BoGSL-ELONG, and methods of their use. The sequences find particular use in modifying the glucosinolate content of a plant. Also provided are primers for these two genes and a third key gene in the glucosinolate pathway, BoGSL-PRO, that can be used for developing molecular markers for assisted selection of plants with specific glucosinolate compositions. Additionally, compositions and methods for a simple, reliable and efficient PCR-based marker system, named sequence-related amplification polymorphism (SRAP), that finds use in the identification of coding sequences in the genome of a plant are provided.
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合成参考文献
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