Adipic Acid Synthesis: A Green and Sustainable Approach

05/04/2023

Adipic acid(cas124-04-9) is a widely used chemical compound that has various applications in the production of resins, nylons, lubricants and plasticizers. However, the conventional method of adipic acid synthesis from KA oil using nitric acid as an oxidant and a catalyst has a serious environmental impact, as it generates large amounts of nitrous oxide, a greenhouse gas that contributes to ozone depletion, acid rain and global warming. Therefore, there is a need to develop cleaner and greener methods of adipic acid synthesis that can avoid the use of toxic reagents and minimize the waste generation.

One of the alternative methods of adipic acid synthesis is the oxidation of cyclohexane

Cyclohexanol or cyclohexanone using oxygen or hydrogen peroxide as oxidants and various heterogeneous catalysts such as metal oxides, zeolites, mesoporous materials and metal-organic frameworks. These methods can achieve high selectivity and yield of adipic acid without producing any harmful by-products. Moreover, these methods can use renewable feedstocks such as biomass-derived cyclohexanol or cyclohexanone as the starting materials, making them more sustainable and eco-friendly.

Another promising method of adipic acid synthesis is the hydroxylation of muconic acid using hydroxamic acids as chelating agents and metal complexes as catalysts. Muconic acid can be obtained from the bioconversion of glucose or lignin, which are abundant and renewable sources of biomass. Hydroxamic acids are organic compounds that can form strong complexes with metal ions and facilitate the hydroxylation reaction. The advantage of this method is that it can produce adipic acid in one step from muconic acid, avoiding the intermediate formation of glutaric acid or succinic acid that require further oxidation steps.

In conclusion, adipic acid(cas124-04-9) synthesis can be achieved by various green and sustainable methods that can overcome the drawbacks of the conventional nitric acid oxidation process. These methods can use renewable feedstocks, benign oxidants and efficient catalysts to produce adipic acid with high purity and yield, while reducing the environmental impact and energy consumption.

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