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    Process for the preparation of α-substituted carboxylic acids from the series comprising α-hydroxycarboxylic acids and n-substituted-α-aminocarboxylic acids
    5.
    发明授权
    Process for the preparation of α-substituted carboxylic acids from the series comprising α-hydroxycarboxylic acids and n-substituted-α-aminocarboxylic acids 有权
    从包含α-羟基羧酸和n-取代的α-氨基羧酸的系列制备α-取代的羧酸的方法

    公开(公告)号：US07332067B2

    公开(公告)日：2008-02-19

    申请号：US10559766

    申请日：2004-06-03

    申请人： Christian Reufer ,  Martin Hateley ,  Thomas Lehmann ,  Christoph Weckbecker ,  Rainer Sanzenbacher ,  Jürgen Bilz

    发明人： Christian Reufer ,  Martin Hateley ,  Thomas Lehmann ,  Christoph Weckbecker ,  Rainer Sanzenbacher ,  Jürgen Bilz

    IPC分类号： C25B3/00

    CPC分类号： C25B3/04

    摘要： A process for the preparation of α-substituted carboxylic acids from the series including α-hydroxycarboxylic acids and N-substituted-α-aminocarboxylic acids by cathodic carboxylation with carbon dioxide of a compound corresponding to the general formula R1—C(═X)R2 which is constituted by aldehydes, ketones or N-substituted imines. In the past, that carboxylation has taken place in an undivided electrolytic cell with the use of a sacrificial anode. As described herein, the carboxylation takes place in the absence of a sacrificial anode in an electrolytic cell divided by a separator, at a diamond film cathode. The anode is formed of a material which is stable under electrolytic conditions; in particular, it is a diamond film electrode. The catholyte includes an organic solvent and a conducting salt.

    摘要翻译： 通过阴离子羧化与通式R 1对应的化合物的二氧化碳从包括α-羟基羧酸和N-取代的α-氨基羧酸的系列制备α-取代的羧酸的方法 > - （-X）R 2，其由醛，酮或N-取代的亚胺构成。 在过去，使用牺牲阳极在不分开的电解槽中发生羧化。 如本文所述，在金刚石膜阴极处，在电解槽中除去隔离层的牺牲阳极不存在下进行羧化。 阳极由在电解条件下稳定的材料形成; 特别是金刚石膜电极。 阴极电解液包括有机溶剂和导电盐。

    Method for the anodic alkoxylation of organic substances
    7.
    发明申请
    Method for the anodic alkoxylation of organic substances 审中-公开
    有机物阳极烷氧基化方法

    公开(公告)号：US20060157353A1

    公开(公告)日：2006-07-20

    申请号：US10546135

    申请日：2004-03-15

    申请人： Christian Reufer ,  Thomas Lehmann ,  Christoph Weckbecker

    发明人： Christian Reufer ,  Thomas Lehmann ,  Christoph Weckbecker

    IPC分类号： C25B3/00

    CPC分类号： C25B3/02

    摘要： Organic substrates, such as cyclic ethers, N-substituted amides, ketones, alkyl-aromatic substances and alkyl-heteroaromatic substances can be anodically alkoxylated, especially methoxylated, in the presence of an alcohol. Alkoxylation in the presence of a mediator or in a divided cell using a solid electrolyte is known. The anodic alkoxylation according to the invention is carried out in the absence of a mediator in an undivided electrolytic cell using a diamond anode or gold anode and allows for high yields and a high current efficiency.

    摘要翻译： 在醇的存在下，有机底物如环醚，N-取代的酰胺，酮，烷基 - 芳族物质和烷基 - 杂芳族物质可以被阳离子烷氧基化，特别是甲氧基化。 在介体存在下或在使用固体电解质的分裂细胞中进行烷氧基化是已知的。 根据本发明的阳极烷氧基化是使用金刚石阳极或金阳极在不分开的电解池中在不存在介质的情况下进行的并且允许高产率和高电流效率。

    Process for the electrochemical preparation of hydrogen peroxide
    8.
    发明授权
    Process for the electrochemical preparation of hydrogen peroxide 失效
    过氧化氢电化学制备工艺

    公开(公告)号：US06685818B2

    公开(公告)日：2004-02-03

    申请号：US09961401

    申请日：2001-09-25

    申请人： Thomas Lehmann ,  Patrik Stenner

    发明人： Thomas Lehmann ,  Patrik Stenner

    IPC分类号： C01B1501

    CPC分类号： C25B1/30

    摘要： A process for the electrochemical preparation of hydrogen peroxide, in particular an aqueous hydrogen peroxide solution, by the electrochemical reaction of oxygen and hydrogen in a fuel cell. By increasing the thickness of the membrane layer in a membrane electrode unit (MEU) in the fuel cell, it is possible to substantially increase the concentration of H2O2 in the aqueous hydrogen peroxide solution obtained at the cathode.

    摘要翻译： 通过氧气和氢气在燃料电池中的电化学反应来电化学制备过氧化氢，特别是过氧化氢水溶液的方法。 通过增加燃料电池中的膜电极单元（MEU）中的膜层的厚度，可以显着增加在阴极处获得的过氧化氢水溶液中的H 2 O 2的浓度。