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    • 71. 发明申请
    • METHOD FOR PRODUCING DITRIMETHYLOLPROPANE
    • 生产二甲基丙烯酸的方法
    • US20130184497A1
    • 2013-07-18
    • US13820586
    • 2011-09-05
    • Masami MatsumotoHiroaki ShigetaNozomi NakagawaIkutaro Kuzuhara
    • Masami MatsumotoHiroaki ShigetaNozomi NakagawaIkutaro Kuzuhara
    • C07C41/42C07C41/01
    • C07C41/42C07C29/38C07C41/01C07C41/40C07C43/132C07C31/22
    • The present invention provides a method for producing ditrimethylolpropane which is characterized by the following (1) and (2): (1) a distillation still residue separated from purified trimethylolpropane is subjected to re-distillation under specific conditions to obtain a ditrimethylolpropane-containing solution having given contents of bis-TMP and tri-TMP; and (2) when subjecting the ditrimethylolpropane-containing solution to crystallization with an organic solvent, the crystallization is initiated under pressure at a temperature exceeding a boiling point of the organic solvent as measured under normal pressures, and the resulting crystallization product solution is cooled at a temperature drop rate of 2° C./min or less. According to the above method, it is possible to produce a high-purity ditrimethylolpropane from a distillation still residue obtained upon production of trimethylolpropane in a simple, industrially useful manner.
    • 本发明提供一种二羟甲基丙烷的制造方法,其特征在于以下(1)和(2):(1)在纯化的三羟甲基丙烷中分离出的蒸馏残余物在特定条件下进行再蒸馏,得到含二羟甲基丙烷的溶液 给出了双TMP和三TMP的内容; 和(2)当使含二羟丙基丙烷的溶液用有机溶剂结晶时,在常压下测量的超过有机溶剂沸点的温度下,在压力下开始结晶,并将所得结晶产物溶液冷却至 降温速度为2℃/分钟以下。 根据上述方法,可以以简单的工业上有用的方式从由三羟甲基丙烷制备得到的蒸馏釜残渣中制备高纯度的二羟甲基丙烷。
    • 75. 发明申请
    • PROCESS FOR PREPARING AN ORTHO-SUBSTITUTED 5-HALOPHENOL AND A SYNTHESIS INTERMEDIATE THEREOF
    • 制备取代的5-羟基苯酚的方法及其合成中间体
    • US20130066097A1
    • 2013-03-14
    • US13698985
    • 2010-05-19
    • Claude MercierFloryan De CampoSébastien Righini
    • Claude MercierFloryan De CampoSébastien Righini
    • C07C41/01C07C309/75
    • C07C303/28C07C41/26C07C303/30C07C309/66C07C43/23
    • A process for preparing a 5-halophenol, ortho-substituted by an electron-donating group, is described. Also described, is a process for preparing a sulphonic ester of an ortho-substituted phenol, which is the synthesis intermediate for the ortho-substituted 5-halophenol. The process for preparing a phenol ortho-substituted by an electron-donating group and protected in the form of a sulphonic ester can include reacting a phenol ortho-substituted by an electron-donating group with a sulphonylating agent in the presence of a Lewis acid. The process for preparing a 5-halophenol ortho-substituted by an electron-donating group can include a first step of preparing a phenol ortho-substituted by an electron-donating group and protected in the form of a sulphonic ester, as described above; a second step of halogenating the protected phenol intermediate obtained in the preceding step, in the position para to the electron-donating group; and a third step of deprotecting the sulphonic ester function to hydroxyl.
    • 描述了由给电子基团取代的5-卤代苯酚的制备方法。 还描述的是制备邻位取代的苯酚的磺酸酯的方法,其为邻位取代的5-卤代苯酚的合成中间体。 制备由供电子基团取代并以磺酸酯形式保护的苯酚的方法可以包括在路易斯酸存在下将由供电子基团邻位取代的苯酚与磺酰化剂反应。 制备由给电子基团取代的5-卤代苯酚的方法可以包括如上所述制备被供电子基团邻位取代并以磺酸酯形式保护的苯酚的第一步骤; 将前述步骤中获得的被保护的苯酚中间体卤化到给电子基团的对位的第二步骤; 以及将磺酸酯功能脱保护成羟基的第三步骤。