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26 条记录 (耗时 0.015 秒)

    Process for the preparation of polyhydric phenols
    4.
    发明授权
    Process for the preparation of polyhydric phenols 失效
    多元酚的制备方法

    公开(公告)号：US4182917A

    公开(公告)日：1980-01-08

    申请号：US857622

    申请日：1977-12-05

    申请人： Hermann Seifert ,  Helmut Waldmann ,  Wulf Schwerdtel ,  Wolfgang Swodenk

    发明人： Hermann Seifert ,  Helmut Waldmann ,  Wulf Schwerdtel ,  Wolfgang Swodenk

    IPC分类号： C07C27/00 ,  C07C37/00 ,  C07C37/60 ,  C07C39/08 ,  C07C67/00

    CPC分类号： C07C37/60

    摘要： A process has been invented for the preparation of pyrocatechol and hydroquinone which comprises reacting a solution which is substantially anhydrous and free from hydrogen peroxide, of a percarboxylic acid in an inert, organic solvent, with phenol at temperatures from -10.degree. C. to 80.degree. C.The compounds obtained according to the invention are known, important industrial chemicals which are used in large amounts in the field of photography and of dyestuffs and plastics and in the field of scents and flavorings.

    摘要翻译： 已经发明了一种用于制备邻苯二酚和氢醌的方法，其包括将基本上无水和不含过氧化氢的过氧化物在惰性有机溶剂中与苯酚在-10℃至80℃的温度下反应 DEG。根据本发明获得的化合物是已知的，在摄影领域和染料和塑料领域以及在香料和调味品领域中大量使用的重要的工业化学品。

    Process for preparing heterocyclic compounds
    6.
    发明授权
    Process for preparing heterocyclic compounds 有权
    制备杂环化合物的方法

    公开(公告)号：US06211379B1

    公开(公告)日：2001-04-03

    申请号：US09488436

    申请日：2000-01-20

    申请人： Hermann Seifert ,  Reinhard Lantzsch ,  Werner Lindner ,  Klaus Jelich

    发明人： Hermann Seifert ,  Reinhard Lantzsch ,  Werner Lindner ,  Klaus Jelich

    IPC分类号： C07D41706

    CPC分类号： C07D417/06

    摘要： The present application relates to a process for preparing compounds of the formula (I) in which R1, A, X and Z are each as defined in the description by reacting compounds of the formula (II) in which A and X are each as defined in the description with compounds of the formula (III) in which Z, R1 and M1 are each as defined in the description.

    摘要翻译： 本申请涉及一种制备式（I）化合物的方法，其中R 1，A，X和Z各自如说明书中所定义，通过使式（II）化合物（其中A和X各自如上所定义） 在其中Z，R 1和M 1各自如说明书中所定义的式（III）化合物的描述中。

    Process for the preparation of propylene oxide
    8.
    发明授权
    Process for the preparation of propylene oxide 失效
    环氧丙烷的制备方法

    公开(公告)号：US4113747A

    公开(公告)日：1978-09-12

    申请号：US678822

    申请日：1976-04-28

    申请人： Gunter Prescher ,  Gerd Schreyer ,  Otto Weiberg ,  Rolf Wirthwein ,  Helmut Waldmann ,  Hermann Seifert ,  Wulf Schwerdtel ,  Wolfgang Swodenk

    发明人： Gunter Prescher ,  Gerd Schreyer ,  Otto Weiberg ,  Rolf Wirthwein ,  Helmut Waldmann ,  Hermann Seifert ,  Wulf Schwerdtel ,  Wolfgang Swodenk

    IPC分类号： C07C409/24 ,  C07D301/14

    CPC分类号： C07C409/24 ,  C07C407/00 ,  C07C407/003 ,  C07D301/14

    摘要： Process for continuous production of propylene oxide (FIG. 1) from propylene and aqueous hydrogen peroxide. The aqueous hydrogen peroxide is first reacted with propionic acid in the presence of acid catalyst to form perpropionic acid (1). The perpropionic acid is taken up by extraction in benzene (5 , 12), and following drying of the benzene solution (16), the perpropionic acid in the solution is reacted with propylene (18) for oxidation of the propylene to propylene oxide and conversion of the perpropionic acid back to propionic acid. The reaction mixture is worked up to separate propylene oxide, propionic acid and benzene (25, 27, 31, 33), and the latter two are recycled. In the benzene extraction (5, 12), an aqueous raffinate (7) is formed containing hydrogen peroxide and acid catalyst. Water is removed from the aqueous raffinate (8) and the concentrate is recycled to the propionic acid reactor. Make-up hydrogen peroxide can be added to the aqueous raffinate before the removal of water.

    摘要翻译： 从丙烯和过氧化氢水溶液连续生产环氧丙烷（图1）的方法。 过氧化氢水溶液首先在酸催化剂存在下与丙酸反应形成过丙酸（1）。 通过在苯（5,12）中萃取，过丙酸被吸收，然后在苯溶液（16）干燥后，将溶液中的过丙酸与丙烯（18）反应，将丙烯氧化成环氧丙烷并转化 的过丙酸回到丙酸。 处理反应混合物以分离环氧丙烷，丙酸和苯（25,27,31,33），后两者被再循环。 在苯提取（5,12）中，形成含有过氧化氢和酸催化剂的残液水溶液（7）。 水从残液（8）中除去，浓缩物再循环到丙酸反应器中。 在除去水之前，可以将补充过氧化氢加入含水残液中。