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According to reports, the invention involves the benzoic acid being placed in a supported transition metal ruthenium catalyst, supercritical carbon dioxide, and cyclohexylformic acid, and undergoing a ring-catalyzed reaction in contact with hydrogen; after the reaction, the solubility of cyclohexylcarboxylic acid in supercritical carbon dioxide is applied to Extraction is performed to separate the catalyst from the product. The process has the advantages of mild reaction conditions, clean reaction process, less organic solvent, high yield, and good product quality.
Cyclohexylcarboxylic acid and its derivatives are important intermediates for organic chemical raw materials and synthetic drugs, and have wide application value in the research and development of new materials and drugs. Cyclohexylcarboxylic acid can be obtained from the catalytic hydrogenation of benzoic acid. The traditional benzoic acid hydrogenation process uses palladium as a catalyst and is performed at a temperature of 160° C. to 200° C., which has the disadvantages of high reaction temperature, complicated process, and low reaction selectivity.
New patent for the synthesis of cyclohexylcarboxylic acid from benzoic acid
The new method for the synthesis of cyclohexylcarboxylic acid by the hydrogenation of benzoic acid developed by the Changchun Institute of Applied Chemistry of the Chinese Academy of Sciences was recently authorized by the national invention patent.