利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

28 条记录 (耗时 0.043 秒)

    Preparation of 2,5-dimethyl-4-hydroxy-2,3-dihydrofuran-3-one
    1.
    发明授权
    Preparation of 2,5-dimethyl-4-hydroxy-2,3-dihydrofuran-3-one 失效
    2,5-二甲基-4-羟基-2,3-二氢呋喃-3-酮的制备

    公开(公告)号：US4290960A

    公开(公告)日：1981-09-22

    申请号：US127467

    申请日：1980-03-05

    申请人： Karl-Heinz Ross ,  Christian Dudeck ,  Walter Himmele ,  Rolf Lebkuecher ,  Wolfgang Sauer

    发明人： Karl-Heinz Ross ,  Christian Dudeck ,  Walter Himmele ,  Rolf Lebkuecher ,  Wolfgang Sauer

    IPC分类号： C07D303/14 ,  C07D307/20 ,  C07D307/32 ,  C07D307/60

    CPC分类号： C07D307/32 ,  C07D303/14 ,  C07D307/20 ,  C07D307/60

    摘要： A process for the preparation of the sought-after scent 2,5-dimethyl-4-hydroxy-2,3-dihydrofuran-3-one, and novel intermediates for the preparation of this compound.2,5-Dimethyl-4-hydroxy-2,3-dihydrofuran-3-one is prepared by first epoxidizing hex-3-ene-2,5-diol in the liquid phase with hydrogen peroxide to give the novel compound 3,4-epoxy-hexane-2,5-diol, which at 40.degree.-280.degree. C. is converted, by means of a catalytic amount of an acid, to the novel compound 2,5-dimethyl-3,4-dihydroxy-tetrahydro-furan. The latter is dehydrogenated by means of oxygen over a silver catalyst or copper catalyst to give the nove compound 2,5-dimethyl-4-hydroxy-tetrahydrofuran-3-one, which is oxidized by means of bismuth oxide, in concentrated acetic acid solution, to give the desired compound 2,5-dimethyl-4-hydroxy-2,3-dihydrofuran-3-one.

    摘要翻译： 制备所需香味2,5-二甲基-4-羟基-2,3-二氢呋喃-3-酮的方法，以及制备该化合物的新型中间体。 通过用过氧化氢在液相中首先环己化己-3-烯-2,5-二醇制备2,5-二甲基-4-羟基-2,3-二氢呋喃-3-酮，得到新化合物3,4 - 环氧己烷-2,5-二醇，其在40℃-280℃下通过催化量的酸转化为新化合物2,5-二甲基-3,4-二羟基 - 四氢 呋喃 后者通过氧气在银催化剂或铜催化剂上脱氢，得到通过氧化铋在浓缩乙酸溶液中氧化的化合物2,5-二甲基-4-羟基 - 四氢呋喃-3-酮 ，得到所需化合物2,5-二甲基-4-羟基-2,3-二氢呋喃-3-酮。

    Preparation of N-methyl-2-pyrrolidone (NMP)
    7.
    发明授权
    Preparation of N-methyl-2-pyrrolidone (NMP) 失效
    制备N-甲基-2-吡咯烷酮（NMP）

    公开(公告)号：US06348601B2

    公开(公告)日：2002-02-19

    申请号：US09774628

    申请日：2001-02-01

    申请人： Frank Ohlbach ,  Johann-Peter Melder ,  Karl-Heinz Ross ,  Martin Rudloff ,  Jörg Liebe

    发明人： Frank Ohlbach ,  Johann-Peter Melder ,  Karl-Heinz Ross ,  Martin Rudloff ,  Jörg Liebe

    IPC分类号： C07D207267

    CPC分类号： C07D207/267

    摘要： N-Methyl-2-pyrrolidone (NMP) is prepared by preparing a mixture comprising monomethylamine, dimethylamine and trimethylamine and ammonia in a first process step by reacting ammonia with methanol at elevated temperature in the presence of a catalyst, separating 10 off the ammonia, reacting the mixture comprising the methylamines with gamma-butyrolactone (&ggr;-BL), in a molar ratio of monomethylamine to &ggr;-BL of at least 1 in a second process step at elevated temperature and superatmospheric pressure, separating NMP and unreacted methylamines from the reaction product and returning unreacted methylamines to the first process step for reaction with methanol and ammonia.

    摘要翻译： 通过在第一工艺步骤中通过在升高的温度下在催化剂存在下使氨与甲醇反应制备包含单甲胺，二甲胺和三甲胺和氨的混合物来制备N-甲基-2-吡咯烷酮（NMP），从氨分离10， 在高温和超大气压下，在第二工艺步骤中使包含甲胺的混合物与γ-丁内酯（γ-BL）以一甲基胺与γ-BL的摩尔比至少为1的反应物反应，从反应中分离NMP和未反应的甲胺 产物并将未反应的甲胺返回到用于与甲醇和氨反应的第一工艺步骤。

    Method for avoiding corrosion
    9.
    发明授权
    Method for avoiding corrosion 有权
    避免腐蚀的方法

    公开(公告)号：US07309403B2

    公开(公告)日：2007-12-18

    申请号：US10572783

    申请日：2004-09-24

    申请人： Werner Reutemann ,  Theodor Weber ,  Karl-Heinz Ross ,  Manfred Julius

    发明人： Werner Reutemann ,  Theodor Weber ,  Karl-Heinz Ross ,  Manfred Julius

    IPC分类号： B01D3/38 ,  B01D3/40 ,  C07C209/86 ,  C07C209/90

    CPC分类号： C07C211/04 ,  C07C209/86 ,  Y10S203/20 ,  Y10S203/24

    摘要： The invention relates to a method of avoiding corrosion in the separation of methylamine from a product stream (10) which is obtained in the preparation of methylamines by gas-phase reaction of methanol and ammonia and includes monomethylamine, dimethylamine, trimethylamine, ammonia and methanol as components, where ammonia is separated off by pure distillation in a first column (1), the remaining components of the product stream obtained as bottoms (12) are fed to a second column (2). Trimethylamine (14) is separated off in the second column (2) by extractive distillation with introduction of water. The further of the product stream obtained as bottoms (15) from the second column (2) are fed to a third column (3), in which monomethylamine and dimethylamine are separated off at the top. The monomethylamine and dimethylamine are separated by distillation in a fourth column (4). To avoid corrosion alkali metal hydroxide is added to the second or third column (3).

    摘要翻译： 本发明涉及一种避免在甲醇与甲醇与氨的气相反应制备甲胺中得到的产物流（10）中分离甲胺的腐蚀方法，包括一甲胺，二甲胺，三甲胺，氨和甲醇 组分，其中在第一塔（1）中通过纯蒸馏分离氨，将作为塔底物（12）获得的产物流的剩余组分进料至第二塔（2）。 通过萃取蒸馏引入三水胺（14）在第二塔（2）中分离。 从第二塔（2）获得的作为塔底物（15）获得的产物流的其它组分进料到第三塔（3），其中一甲胺和二甲胺在顶部分离。 在第四列（4）中通过蒸馏分离一甲胺和二甲胺。 为了避免腐蚀，将碱金属氢氧化物加入到第二或第三塔（3）中。

    Method for the Continuous Production of an Amine
    10.
    发明申请
    Method for the Continuous Production of an Amine 失效
    连续生产胺的方法

    公开(公告)号：US20070232833A1

    公开(公告)日：2007-10-04

    申请号：US11596292

    申请日：2005-05-04

    申请人： Frank Haese ,  Arnd Bottcher ,  Bernd Stein ,  Wolfgang Reif ,  Johann-Peter Melder ,  Karl-Heinz Ross ,  Heinz Rutter ,  Shelue Liang ,  Stefan Rittinger

    发明人： Frank Haese ,  Arnd Bottcher ,  Bernd Stein ,  Wolfgang Reif ,  Johann-Peter Melder ,  Karl-Heinz Ross ,  Heinz Rutter ,  Shelue Liang ,  Stefan Rittinger

    IPC分类号： C07C209/60

    CPC分类号： C07C209/26 ,  C07C209/16 ,  C07C213/02 ,  C07D295/027 ,  C07D295/03 ,  C07D295/088 ,  C08G59/50 ,  Y02P20/582 ,  C07C211/06 ,  C07C211/08 ,  C07C211/35 ,  C07C217/08

    摘要： Process for the continuous preparation of an amine by reaction of a primary or secondary alcohol, aldehyde and/or ketone with hydrogen and a nitrogen compound selected from the group consisting of ammonia, primary and secondary amines at a temperature in the range from 60 to 300° C in the presence of a copper-containing catalyst, wherein the catalytically active composition of the catalyst prior to reduction with hydrogen comprises from 20 to 85% by weight of aluminum oxide (Al2O3), zirconium dioxide (ZrO2), titanium dioxide (TiO2) and/or silicon dioxide (SiO2), from 1 to 70% by weight of oxygen-containing compounds of copper, calculated as CuO, from 0 to 50% by weight of oxygen-containing compounds of magnesium, calculated as MgO, oxygen-containing compounds of chromium, calculated as Cr2O3, oxygen-containing compounds of zinc, calculated as ZnO, oxygen-containing compounds of barium, calculated as BaO, and/or oxygen-containing compounds of calcium, calculated as CaO, and less than 30% by weight of oxygen-containing compounds of nickel, calculated as NiO, based on the oxygen-containing compounds of copper, calculated as CuO, and the reaction is carried out isothermally in the gas phase in a tube reactor.

    摘要翻译： 通过伯醇或仲醇，醛和/或酮与氢和选自氨，伯胺和仲胺的氮化合物在60至300℃的温度下反应来连续制备胺的方法 在含铜催化剂存在下，其中催化剂在用氢还原之前的催化活性组合物包含20至85重量％的氧化铝（Al 2 O 3） 3），二氧化锆（ZrO 2），二氧化钛（TiO 2）和/或二氧化硅（SiO 2） ，1至70重量％的以CuO计的含氧化合物的铜，0至50重量％的以氧化镁计的含氧化合物，以氧化铬计算的含铬化合物， 以ZnO计算的含氧化合物锌，以BaO计的钡的含氧化合物和/ 或以CaO计的含氧化合物的钙，小于30重量％的按NiO计的含氧化合物的镍，以CuO计算的含氧化合物计算，并进行反应 在管式反应器中在气相中等温。