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160 条记录 (耗时 0.023 秒)

    Installation and process for the preparation of hydrogen cyanide
    3.
    发明授权
    Installation and process for the preparation of hydrogen cyanide 有权

    公开(公告)号：US09944533B2

    公开(公告)日：2018-04-17

    申请号：US14905435

    申请日：2014-07-18

    申请人： Arkema France

    发明人： Yves Bernardin ,  Xavier Marcarian ,  Romain Billon

    IPC分类号： C01C3/02 ,  C07C67/20 ,  C07C231/06 ,  C07C231/12 ,  C07C253/04 ,  C07C51/06

    CPC分类号： C01C3/0212 ,  C01C3/022 ,  C07C51/06 ,  C07C67/20 ,  C07C231/06 ,  C07C231/12 ,  C07C253/04 ,  Y02P20/129

    摘要： Present invention relates to a process and an installation (100) for the preparation of hydrogen cyanide by the Andrussow process, and more precisely for improving the conditions of mixing the reactant gases before feeding the Andrussow type reactor (60), in order to improve safety, to avoid any risk of explosion and to produce HCN in safe and efficient manner. The installation is configured in such a manner that oxygen is pre-mixed with air with a ratio comprised between 20.95% and 32.5% by volume, preferably between 25% and 30.5% by volume; methane containing gas and ammonia are simultaneously added in the pre-mixture of oxygen-enriched air in such a manner that the volumic ratio of methane to ammonia is comprised between 1.35 and 1.02 depending on the content of oxygen into air; said obtained reactant gases mixture having a temperature comprised between 80° C. and 120° C., preferably between 95° C. and 115° C. for feeding the Andrussow type reactor (60).

    Preparation of perylene-3, 4-Dicarboxylic acid anhydrides
    8.
    发明授权
    Preparation of perylene-3, 4-Dicarboxylic acid anhydrides 失效
    苝-3,4-二羧酸酐的制备

    公开(公告)号：US5900490A

    公开(公告)日：1999-05-04

    申请号：US7193

    申请日：1998-01-14

    申请人： Leonhard Feiler

    发明人： Leonhard Feiler

    IPC分类号： C07D221/18 ,  C07C50/36 ,  C07C51/00 ,  C07C51/06 ,  C07C51/54 ,  C07D311/78 ,  C07D311/96 ,  C09B5/62 ,  C09D11/00

    CPC分类号： C09B5/62 ,  C07C51/54 ,  C07D311/78

    摘要： Preparation of perylene-3,4-dicarboxylic acid anhydrides of the general formula I ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 can each be independently of one another hydrogen, halogen, C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.14 cycloalkyl, C.sub.1 -C.sub.20 alkoxy, phenyl, phenyloxy or phenylthio, where phenyl can in each case be mono- or polysubstituted by halogen, C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.14 cycloalkyl and/or C.sub.1 -C.sub.20 alkoxy; --NR.sup.5.sub.2 or --OR.sup.5, wherein R.sup.5 is hydrogen or C.sub.1 -C.sub.20 alkyl, or one of the pairs R.sup.1 /R.sup.2 and R.sup.3 /R.sup.4 each in 6,7- or 1,12-position is a bridge having the bridge atoms or bridge atom groups --O--, --S--, S.dbd.O, SO.sub.2 or --NR.sup.6, wherein R.sup.6 is hydrogen, C.sub.1 -C.sub.20 alkyl or C.sub.3 -C.sub.14 cycloalkyl, by treating a perylene-3,4-dicarboximide of formula II ##STR2## (a) in a first step with a base and, (b) in a second step, reacting the resultant anion with an alkylation agent R.sup.7 --X, X being halogen and R.sup.7 being unsubstituted or phenyl-substituted C.sub.1 -C.sub.20 alkyl, to the corresponding carboximide and,(c) in a third step, treating the alkylated carboximide first with a base and, after the treatment with a base, obtaining the perylene-3,4-dicarboxylic acid anhydride I by acidifying the reaction mixture, andnovel perylene-3,4-dicarboxylic acid anhydrides, novel N-alkylperylene-3,4-dicarboxylic acid imides and possibilities for the application of the compounds prepared according to this invention.

    摘要翻译： 制备通式Ⅰ的苝-3,4-二羧酸酐，其中R 1，R 2，R 3和R 4各自各自独立地为氢，卤素，C 1 -C 20烷基，C 3 -C 14环烷基，C 1 -C 20烷氧基，苯基，苯氧基 或苯硫基，其中每种情况下苯基可被卤素，C 1 -C 20烷基，C 3 -C 14环烷基和/或C 1 -C 20烷氧基单取代或多取代; -NR 52或-OR 5，其中R 5是氢或C 1 -C 20烷基，或者每个6,7或1,12位中的一对R 1 / R 2和R 3 / R 4是具有桥原子或桥原子基团的桥 -O-，-S-，S = O，SO 2或-NR 6，其中R 6是氢，C 1 -C 20烷基或C 3 -C 14环烷基，通过在第一步中处理式II（a）的苝-3,4-二甲酰亚胺 与碱反应，（b）在第二步中，使所得阴离子与烷基化试剂R7-X，X为卤素，R7为未取代的或苯基取代的C1-C20烷基反应至相应的甲酰亚胺，和（c） 第三步，首先用碱处理烷基化的酰亚胺化物，在用碱处理后，通过酸化反应混合物得到苝-3,4-二羧酸酐I，并加入新的苝-3,4-二羧酸酐 ，新型N-烷基亚丙基-3,4-二羧酸酰亚胺以及应用根据本发明制备的化合物的可能性。

    Process for the preparation of 2,3,4,5-tetrafluorobenzoic acid
    9.
    发明授权
    Process for the preparation of 2,3,4,5-tetrafluorobenzoic acid 失效
    制备2,3,4,5-四氢叶酸的方法

    公开(公告)号：US5179230A

    公开(公告)日：1993-01-12

    申请号：US872059

    申请日：1992-04-23

    申请人： Theodor Papenfuhs ,  Ralf Pfirmann

    发明人： Theodor Papenfuhs ,  Ralf Pfirmann

    IPC分类号： C07C51/00 ,  C07C51/06 ,  C07C63/70

    CPC分类号： C07C51/44 ,  C07C51/38

    摘要： A process for the preparation of 2,3,4,5,-tetrafluorobenzoic acid of the formula (1) ##STR1## by heating N'-substituted N-aminotetrafluorophthalimides of the formula (2) ##STR2## in which X is the radical ##STR3## where R.sub.1, R.sub.2 are a hydrogen atom, an alkyl-(C.sub.1 -C.sub.10)- group, aryl group, alkyl-(C.sub.1 -C.sub.6)-Co- group or aryl-CO- group, it being possible for the aryl or aryl-CO- group in the case of R.sub.1 and R.sub.2 to be substituted on the aromatic ring by fluorine and/or chlorine atoms and/or alkyl-(C.sub.1 -C.sub.4)-groups, or R.sub.1 and R.sub.2 together are a phthaloyl radical which can be substituted on the aromatic ring by 4 chlorine atoms or 4 fluorine atoms, or where X is the radical ##STR4## which can be substituted on the aromatic ring by fluorine and/or chlorine atoms and/or alkyl-(C.sub.1 -C.sub.4)- groups, in an aqueous medium at pH values of approximately -1 to approximately +1 at temperatures of approximately 160 to approximately 220.degree. C.

    摘要翻译： 通过加热式（2）的N-取代的N-氨基四氟邻苯二甲酰亚胺（2）制备式（1）的2,3,4,5-四氟苯甲酸的方法（1） 其中X是基团，其中R 1，R 2是氢原子，烷基 - （C 1 -C 10） - 基，芳基，烷基 - （C 1 -C 6） - 基或芳基-CO-基团， R 1和R 2在芳环上被氟和/或氯原子和/或烷基 - （C 1 -C 4） - 基团取代时，芳基或芳基-CO-基团是有可能的，或者R1和R2 一起是可以在芳环上被4个氯原子或4个氟原子取代的邻苯二甲酰基，或其中X是可以在芳环上被氟和/或氯原子和/或烷基取代的基团 - （C1-C4） - 基团，在约160至约220℃的温度下，pH值约为-1至约+ 1的水性介质中。