KOLBE ELECTROLYSIS OF MIXTURES OF ALIPHATIC ORGANIC-ACIDS
KOLBE ELECTROLYSIS OF MIXTURES OF ALIPHATIC ORGANIC-ACIDS
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DOI：
10.1149/1.2115697
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发表时间：
1984-01-01
影响因子：
3.9
通讯作者：
CHENG, LK
中科院分区：
文献类型：
--
作者：
LEVY, PF;SANDERSON, JE;CHENG, LK
在光滑铂阳极上，对水溶液中正丁酸和正己酸以及丙酸和正己酸的混合物进行了柯尔贝电解。通常，在水溶液中通过丁酸的氧化产生的己烷或由丙酸产生的丁烷未观察到超过百分之几。在目前的工作中，观察到这些产品的显着增加。此外，反应的剩余C3或C4酸的相当大部分转化为具有己酸的混合烷烃二聚体。这些结果被解释为一个模型，其中~，-己酸及其各种氧化产物在阳极表面形成亲油层，提供了一个环境，进一步氧化碳离子是不利的。这个模型以前已经被提出来解释压力对柯尔贝电解的影响（1）。这一观察结果支持了由混合有机酸生产用作燃料和化学品的混合直链烷烃的可行性，所述混合有机酸可以通过有机物质的厌氧发酵产生。
Kolbe electrolysis of mixtures of n-butanoic with n-hexanoic acid and propanoic with n-hexanoic acid have been performed in aqueous solution at a smooth platinum anode. Typically, hexane production by the oxidation of butanoic acid, or butane production from propanoic acid, in aqueous solution is not observed to exceed a few percent. In the current work, significant increases of these products were observed. In addition, a substantial fraction of the remaining C3 or C4 acids reacted were converted to mixed alkane dimers with hexanoic acid. These results are interpreted by a model in which~,-hexanoic acid and its various oxidation products form a lipophilic layer at the anode surface which provides an environment where further oxidation to carbonium ions is disfavored. This model has been suggested previously to explain pressure effects on Kolbe electrolysis (1). This observation supports the feasibility of producing mixed linear alkanes for use as fuels and chemicals from mixed organic acids which may be produced by anaerobic fermentation of organic matter.