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31.发明授权Purification of mixtures of nitroaromatic compounds by removing nitrocresols therefrom 失效通过从其中除去硝基酚来净化硝基芳族化合物的混合物
公开(公告)号：US5874654A
公开(公告)日：1999-02-23
申请号：US934115
申请日：1997-09-19
Applicant: Antoinette Gacon-Camoz , Pascal Metivier
Inventor： Antoinette Gacon-Camoz , Pascal Metivier
IPC: C07C201/16
CPC classification number: C07C201/16
Abstract: Environmentally-polluting nitrocresol values are removed from admixtures of nitroaromatic compounds comprised thereof, notably the media of nitration of aromatic compounds by reacting same with aqueous HNO.sub.3 /H.sub.2 SO.sub.4, by first intimately contacting such nitroaromatic compound admixtures with an oxidizing agent comprising hydrogen peroxide, javelle water, or mixture thereof, and thereafter with a neutralizing agent; the nitroaromatic aromatic compounds thus purified are conveniently catalytically hydrogenated into aromatic amines.
Abstract translation: 通过首先使这种硝基芳族化合物外加剂与包含过氧化氢，悬浮液的氧化剂紧密接触，从而与其组成的硝基芳族化合物的混合物，特别是芳族化合物硝化的介质从HNO 3 / H 2 SO 4水溶液中除去环境污染的硝基甲酚值 ，或其混合物，然后用中和剂; 如此纯化的硝基芳族芳族化合物方便地催化氢化成芳族胺。
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32.发明授权Preparation of optically active .alpha.-(hydroxyphenoxy)alkanecarboxylic acids and derivatives thereof 失效光学活性α-（羟基苯氧基）烷羧酸及其衍生物的制备
公开(公告)号：US5654338A
公开(公告)日：1997-08-05
申请号：US428710
申请日：1995-04-25
Applicant: Pascal Metivier
Inventor： Pascal Metivier
CPC classification number: C07C51/367 , C07C67/31
Abstract: Optically active .alpha.-(hydroxyphenoxy)-alkanecarboxylic acids or derivatives thereof, for example D-2-(4-hydroxyphenoxy)propionic acid or lower alkyl ester thereof, are prepared by (a) saponifying an alkyl ester of an optically active .alpha.-halogeno-alkanecarboxylic acid, in an alcoholic solvent medium, by reacting same with an aqueous solution of an alkali metal hydroxide, thereby providing a solution of an alkali metal salt of an optically active .alpha.-halogeno-alkanecarboxylic acid, (b) next reacting the step (a) solution thus provided with a dihydroxybenzene or salt thereof, in the presence of an alkali metal hydroxide and in an alcoholic solvent medium, and thence (c) recovering the optically active .alpha.-(hydroxyphenoxy)-alkanecarboxylic acid or derivative thereof from the medium of reaction.
Abstract translation: 光学活性α-（羟基苯氧基） - 烷羧酸或其衍生物，例如D-2-（4-羟基苯氧基）丙酸或其低级烷基酯通过以下方法制备：（a）皂化光学活性α-卤代的烷基酯 - 烷醇羧酸，在醇溶剂介质中，通过与碱金属氢氧化物的水溶液反应，从而提供光学活性α-卤代 - 链烷羧酸的碱金属盐的溶液，（b）接下来使步骤 （a）在碱金属氢氧化物和醇溶剂介质的存在下提供二羟基苯或其盐的溶液，然后（c）从光学活性α-（羟基苯氧基） - 烷羧酸或其衍生物从 反应介质
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