中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

56 records (took 0.019 seconds)

    Process for the preparation of N-alkylated anilines
    22.
    发明授权
    Process for the preparation of N-alkylated anilines 失效
    N-烷基化苯胺的制备方法

    公开(公告)号：US5055617A

    公开(公告)日：1991-10-08

    申请号：US552277

    申请日：1990-07-12

    Applicant: Peter Wimmer ,  Hans-Josef Buysch ,  Lothar Puppe ,  Christian Froehlich

    Inventor： Peter Wimmer ,  Hans-Josef Buysch ,  Lothar Puppe ,  Christian Froehlich

    IPC: C07C209/18 ,  C07C211/48

    CPC classification number: C07C209/18

    Abstract: Anilines or N-alkyl-anilines are advantageously reacted with alkyl alcohols or the associated dialkyl ethers at elevated temperature in the gas phase, if a .gamma.-Al.sub.2 O.sub.3 is used that is prepared by dehydration of an aluminum oxide/hydroxide hydrate and has a BET surface area from 50 to 400 m.sup.2 /g and a surface acidity of 5 to 600 mmol H.sup.+ /kg.

    Abstract translation: 如果使用通过氧化铝/氢氧化物水合物的脱水制备并具有BET表面的γ-Al 2 O 3，则苯胺或N-烷基苯胺有利地在气相中在升高的温度下与烷基醇或相关联的二烷基醚反应 面积为50〜400m2 / g，表面酸度为5〜600mmol H + / kg。

    Process for the preparation of oligophenyls dihalogenated in the 4,4'-position
    23.
    发明授权
    Process for the preparation of oligophenyls dihalogenated in the 4,4'-position 失效
    制备4,4'-位二卤代低聚苯基的方法

    公开(公告)号：US5053566A

    公开(公告)日：1991-10-01

    申请号：US571956

    申请日：1990-08-23

    Applicant: Artur Botta ,  Hans-Josef Buysch ,  Lothar Puppe

    Inventor： Artur Botta ,  Hans-Josef Buysch ,  Lothar Puppe

    IPC: C07C41/22 ,  B01J29/50 ,  B01J29/60 ,  B01J29/70 ,  C07B61/00 ,  C07C17/12 ,  C07C25/18 ,  C07C41/38 ,  C07C43/225

    CPC classification number: C07C17/12

    Abstract: Oligophenyls dihalogenated in the 4,4'-position, of the formula ##STR1## can be prepared by catalyzed halogenation of oligophenyls of the formula ##STR2## wherein, in the formulae, X.sup.1 and X.sup.2 independently of one another represent chlorine or bromine, preferably chlorine,X.sup.3 denotes hydrogen, chlorine or bromine, preferably hydrogen or chlorine and particularly preferably hydrogen,R.sup.1, R.sup.2 and R.sup.3 independently of one another represent hydrogen, C.sub.1 -C.sub.4 -alkyl (preferably methyl or ethyl and particularly preferably methyl), C.sub.1 -C.sub.4 -alkoxy (preferably methoxy or ethoxy and particularly preferably methoxy), fluorine, chlorine or bromine anda assumes the value zero or one,with halogenating agents, the preparation being carried out in the presence of methylene chloride or solvent mixtures essentially containing methylene chloride and in the presence of zeolites of the L structure type which contain metal cations.

    Abstract translation: 在式（Ⅰ）的4,4'-位上二卤代的低级苯基可以通过式（II）的低聚苯基的催化卤化来制备，其中在式中X1和X2彼此独立地 代表氯或溴，优选氯，X3表示氢，氯或溴，优选氢或氯，特别优选氢，R 1，R 2和R 3彼此独立地表示氢，C 1 -C 4烷基（优选甲基或乙基，特别优选 甲基），C1-C4-烷氧基（优选甲氧基或乙氧基，特别优选甲氧基），氟，氯或溴，并且与卤化剂呈现零或一个值，该制剂在二氯甲烷或溶剂存在下进行 基本上含有二氯甲烷的混合物和在含有金属阳离子的L结构类型的沸石的存在下。

Patent Agency Ranking