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    • 2. 发明申请
    • Processes for producing terephthalic acid
    • 生产对苯二甲酸的方法
    • US20060205977A1
    • 2006-09-14
    • US11214406
    • 2005-08-29
    • Charles SumnerRobert HembreDavid LangeGino LavoieBrent TennantThomas FloydBryan DavenportDaniel ComptonJoseph Bays
    • Charles SumnerRobert HembreDavid LangeGino LavoieBrent TennantThomas FloydBryan DavenportDaniel ComptonJoseph Bays
    • C07C51/16C07C51/255
    • C07C51/265C07C63/26
    • Processes for producing terephthalic acid are disclosed, the processes comprising combining in a reaction medium p-xylene, a solvent comprising water and one or more saturated organic acids having from 2-4 carbon atoms, and an oxygen-containing gas, at a temperature from about 135° C. to about 165° C., in the presence of a catalyst composition comprising cobalt atoms and manganese atoms, with bromine atoms provided as a promoter. The amount of cobalt used may be from about 1,800 ppm to about 6,000 ppm, with respect to the total weight of the liquid in the reaction medium, and the weight ratio of cobalt to manganese may be from about 40 to about 400. The processes according to the invention produce terephthalic acid as a precipitated reaction product, with typically no more than about 10 ppm 2,6-dicarboxyfluorenone produced, with respect to the weight of the terephthalic acid produced, or no more than about 20 ppm 2,6-dicarboxyfluorenone, with respect to the total weight of the reaction medium, per batch or upon one pass through a reactor. The terephthalic acid so produced may be further purified by one or more additional oxidation reactions, without the need for expensive hydrogenation purification processes.
    • 公开了制备对苯二甲酸的方法,该方法包括在反应介质中混合对二甲苯,包含水和一种或多种具有2-4个碳原子的饱和有机酸的溶剂和含氧气体, 约135℃至约165℃,在包含钴原子和锰原子的催化剂组合物存在下,提供溴原子作为助催化剂。 相对于反应介质中的液体的总重量,所使用的钴的量可以为约1,800ppm至约6,000ppm,并且钴与锰的重量比可以为约40至约400.根据 本发明产生对苯二甲酸作为沉淀反应产物,相对于所生产的对苯二甲酸的重量,通常不超过约10ppm的2,6-二羧基芴酮,或不超过约20p​​pm的2,6-二羧基芴酮 ,相对于反应介质的总重量,每批次或一次通过反应器。 如此生产的对苯二甲酸可以通过一个或多个另外的氧化反应进一步纯化,而不需要昂贵的氢化纯化方法。
    • 4. 发明申请
    • Process for alpha,beta-dihydroxyalkenes and derivatives
    • α,β-二羟基烯醇和衍生物的方法
    • US20060030742A1
    • 2006-02-09
    • US11204786
    • 2005-08-16
    • Robert HembreJonathan Penney
    • Robert HembreJonathan Penney
    • C07C33/02
    • C07D301/14C07B2200/07C07B2200/09C07C29/172C07C29/44C07C31/20C07C33/025C07C31/22C07C31/24
    • Disclosed is a process wherein a first olefin selected from certain α,β-dihydroxyalkenes and 4-(alkenyl)ethylenecarbonates is reacted with a second olefin reactant to produce an olefin metathesis product. When the first olefin reactant is an optically enriched or enantiomerically pure α,β-dihydroxyalkene, cross metathesis reactions produce products possessing the same optical purity. The α,β-dihydroxyalkenes and the 4-(alkenyl)ethylene carbonates may be converted to hydrogenated products, and the 4-(alkenyl)ethylenecarbonates may be decarboxylated to provide the corresponding epoxides. The products of the disclosure may be used as monomers for the preparation of specialty polyesters and as intermediates in the manufacture pharmaceuticals and other chemicals.
    • 公开了一种方法,其中选自某种α,β-二羟基烯烃和4-(链烯基)亚乙基碳酸酯的第一种烯烃与第二种烯烃反应物反应以产生烯烃复分解产物。 当第一种烯烃反应物是光学富集或对映体纯的α,β-二羟基亚油,交叉复分解反应产生具有相同光学纯度的产物。 α,β-二羟基烯烃和4-(烯基)亚乙基碳酸酯可以转化为氢化产物,并且4-(烯基)亚乙基碳酸酯可以脱羧以提供相应的环氧化物。 本公开的产品可以用作制备特种聚酯的单体和作为制造药物和其它化学品的中间体。