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Carboxylic acid
About: Carboxylic acid is a research topic. Over the lifetime, 48544 publications have been published within this topic receiving 605696 citations.
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138 citations
Patent•
08 Oct 2008TL;DR: In this article, a cyclic imide catalyst is used to remove a portion of the reaction medium from the reaction zone, which is then stripped of water and organic acid impurities.
Abstract: In a process for oxidizing a hydrocarbon to the corresponding hydroperoxide, alcohol, ketone, carboxylic acid or dicarboxylic acid, a reaction medium comprising a hydrocarbon is contacted with an oxygen-containing gas in a reaction zone and in the presence of a catalyst comprising a cyclic imide. During the oxidation process, a portion of the reaction medium is continuously or intermittently removed from the reaction zone, is stripped of water and organic acid impurities and then returned to the reaction zone.
138 citations
TL;DR: In this paper, it has been known that certain types of polymers, "chemical muscles" change dimensions depending on their chemical environment, i.e., the degree of ionization of the weak carboxylic acid groups.
Abstract: FOR several years it has been known that certain types of polymers, ‘chemical muscles’, change dimensions depending on their chemical environment1. A typical one is that prepared as a co-polymer of polyvinyl alcohol (PVA) and polyacrylic acid (PAA)2. This polymer swells or shrinks osmotically depending on the total ionic concentration inside the polymer. This is determined primarily by the degree of ionization of the weak carboxylic acid groups. When the external solution is acidic the degree of dissociation is low and the polymer shrinks. In alkaline solution it expands. This has been referred to as the ‘pH muscle’2.
138 citations
TL;DR: The robust cooperative cobalt(III) catalysis proved tolerant of valuable electrophilic functional groups, including hydroxyl, bromo, and iodo substituents and revealed a considerable additive effect on kinetics and on a negative non-linear-effect.
Abstract: The enantioselective cobalt(III)-catalyzed C-H alkylation was achieved through the design of a novel chiral acid. The cobalt(III)-catalyzed enantioselective C-H activation was characterized by high position-, regio- and enantio-control under exceedingly mild reaction conditions. Thereby, the robust cooperative cobalt(III) catalysis proved tolerant of valuable electrophilic functional groups, including hydroxyl, bromo, and iodo substituents. Mechanistic studies revealed a considerable additive effect on kinetics and on a negative non-linear-effect.
138 citations
TL;DR: In this paper, the recent development of mechanism and the material study for both homogeneous and heterogeneous catalysts for the decomposition of formic acid to yield hydrogen and carbon dioxide at mild condition are reviewed in detail.
138 citations