Production of oxalic acid from sawdust using coal fly ash as a catalyst
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Date
2021-10-19
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Springer Nature
Abstract
The production of oxalic acid from sawdust using a mixture of strong nitric acid and concentrated sulphuric acid with coal fly ash as a catalyst has been explored. Operating parameters affecting the reaction were determined to be temperature, mesh size and amount of fly ash catalyst, time and the HNO3 ∶ H2SO4 ratio. A maximum oxalic acid yield of 84% was obtained using a mixture of 60% HNO3 and 40% H2SO4 at 70 °C and a reaction time of 150 minutes. Coal fly ash with particle size of 50–100 μm proved to be a suitable and efficient catalyst, and the optimum quantity of catalyst employed was 5g of fly ash for every 100g of sawdust.
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Citation
Kuipa, O., Kasungasunge, G. and Kuipa, P.K., 2021. Production of oxalic acid from sawdust using coal fly ash as a catalyst. SN Applied Sciences, 3, pp.1-9.