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    • 25. 发明授权
    • Preparation of haloalcohols
    • 卤代醇的制备
    • US5237113A
    • 1993-08-17
    • US973553
    • 1992-11-09
    • Rainer BeckerWolfgang MackenrothWalter Seufert
    • Rainer BeckerWolfgang MackenrothWalter Seufert
    • C07C29/62
    • C07C29/62
    • Haloalcohols of the general formula IHal--X--OH (I)where X is straight-chain or branched, substituted or unsubstituted alkylene of 4 or more carbon atoms in the chain, which may be interrupted by one or more heteroatoms, and Hal is halogen, are prepared by reacting a diol of the general formula IIHO--X--OH (II)where X has the above meanings, with an aqueous hydrogen halide solution in a water-immiscible organic solvent which is inert under the reaction conditions, at from 50.degree. to 150.degree. C., using an excess of hydrogen halide, based on the diol of the general formula II, of from 10 to 200 mole percent and setting a volume ratio of inorganic phase: organic phase of from 1:2 to 1:50.
    • 通式I Hal-X-OH(I)的卤代醇,其中X是链中4个或更多个碳原子的直链或支链,取代或未取代的亚烷基,其可被一个或多个杂原子间隔,Hal是 卤素,通过使具有上述含义的通式II HO-X-OH(II)的二醇与卤化氢水溶液在反应条件下为惰性的水不混溶的有机溶剂中,在 从50℃至150℃,使用过量的基于通式II的二醇的卤化氢为10至200摩尔%,并将无机相:有机相的体积比为1:2设定为 1:50。
    • 27. 发明授权
    • Method for producing toluylenediamine by hydrogenating dinitrotoluene
    • 通过氢化二硝基甲苯生产甲苯二胺的方法
    • US08614356B2
    • 2013-12-24
    • US13142718
    • 2009-12-21
    • Joana Coelho TsouSteffen OehlenschlaegerEkkehard SchwabWolfgang MackenrothHartwig VossStefan MaixnerSamuel NetoSven BoehmekeFrederik Van Laar
    • Joana Coelho TsouSteffen OehlenschlaegerEkkehard SchwabWolfgang MackenrothHartwig VossStefan MaixnerSamuel NetoSven BoehmekeFrederik Van Laar
    • C07C209/00C07C211/00
    • C07C209/36C07C211/50
    • A process for preparing tolylenediamine by hydrogenating dinitrotoluene with hydrogen in the presence of a suspended catalyst in a vertically upright reactor (1), at the upper end of which is arranged a motive jet nozzle (2) through which the reaction mixture drawn off from the reactor bottom, via an external loop, is sprayed into the upper region of the reactor (1) and then flows into a central inserted tube (4) which is arranged in the longitudinal direction of the reactor, flows through the latter from the top downward and flows upward again outside the inserted tube (4) in an internal loop motion, with a heat exchanger (6) in the interior of the reactor (1), through which cooling water flows, and absorbs some of the heat of reaction as it does so, with a feed for the dinitrotoluene at the upper end of the reactor (1) and a feed for the hydrogen at the lower end of the reactor (1), and wherein, in addition to the heat exchanger (6) arranged in the interior of the reactor (1), a further heat exchanger (W) is used in the external loop, in which water absorbs the rest of the heat of reaction by indirect heat exchange with the reaction mixture, which comprises utilizing the heat of reaction to raise steam with a pressure of at least 4 bar gauge by performing the hydrogenation of dinitrotoluene to tolylenediamine at a temperature of ≧180° C.
    • 一种通过在悬浮催化剂存在下用氢气将二硝基甲苯氢化在垂直直立反应器(1)中来制备甲苯二胺的方法,其上端设置有动力喷嘴(2),反应混合物从其中排出 反应器底部通过外部环路喷射到反应器(1)的上部区域中,然后流入沿着反应器的纵向布置的中心插入管(4),其从顶部向下流动 并且在反应器(1)的内部具有热交换器(6),内部循环运动再次向外流过插入的管(4),冷却水通过该换热器(6)流过,并吸收一些反应热 用反应器(1)上端的二硝基甲苯进料和反应器(1)下端的氢气进料,并且其中除了设置在反应器(1)的下端的热交换器 反应器(1)的内部,一个furt 她的热交换器(W)用于外部回路中,其中水通过与反应混合物的间接热交换吸收剩余的反应热,其中包括利用反应热量以至少4的压力升高蒸汽 通过在> = 180℃的温度下进行二硝基甲苯氢化成甲苯二胺来测定。
    • 28. 发明授权
    • Method for producing dinitrotoluene
    • 二硝基甲苯生产方法
    • US07851661B2
    • 2010-12-14
    • US10586683
    • 2005-02-02
    • Johannes BuettnerWolfgang MackenrothHeinrich HermannPeter KoniecznyJuergen Gebauer
    • Johannes BuettnerWolfgang MackenrothHeinrich HermannPeter KoniecznyJuergen Gebauer
    • C07C205/00
    • C07C201/08C07C201/14C07C205/06
    • The present invention provides a process for preparing dinitrotoluene, comprising the steps of a) reacting toluene with nitric acid in the presence of sulphuric acid to give mononitrotoluene, b) separating the reaction product from step a) into an organic phase comprising mononitrotoluene and an aqueous phase comprising sulfuric acid, c) reacting the organic phase comprising mononitrotoluene with nitric acid in the presence of sulphuric acid to give dinitrotoluene, d) separating the reaction product from step c) into an organic phase comprising dinitrotoluene and an aqueous phase comprising sulfuric acid, wherein the reaction product from step a) has a content of toluene of from 3.0 to 8% by weight, based on the organic phase, and a content of nitric acid of from 0.1 to 1.2% by weight, based on the aqueous phase, and the phase separation in step b) is effected in such a way that further reaction of the toluene with the nitric acid is prevented.
    • 本发明提供了制备二硝基甲苯的方法,包括以下步骤:a)在硫酸存在下使甲苯与硝酸反应得到一硝基甲苯,b)将步骤a)中的反应产物分离成包含单硝基甲苯和水 相,包括硫酸,c)在硫酸存在下使包含一硝基甲苯的有机相与硝酸反应,得到二硝基甲苯,d)将步骤c)中的反应产物分离成包含二硝基甲苯和含有硫酸的水相的有机相, 其中步骤a)的反应产物的甲苯含量为3.0-8重量%,基于有机相,硝酸含量为0.1-1.2重量%,基于水相,和 步骤b)中的相分离是以防止甲苯与硝酸进一步反应的方式进行的。