Abstract
In the vegetable oil chemical industry, hydrogenation is one of the most important processes. An alternative method for vegetable oil hydrogenation is the use of catalytic transfer hydrogenation (CTH), which can utilize organic molecules as hydrogen donors at ambient pressure. These alternative processes should be optimized in relation to the variables required for a good conversion and impacts should also be known to be minimized. An assessment of the environmental impact of laboratory scale chemical processes is an important tool to improve the technological aspects of a process (increased yields, reduced production times, lower costs) and it can also lead to the creation of a cleaner technology. Using the Leopold Matrix, we have succeeded in developing a more efficient and cleaner process for the CTH of castor oil using Raney Ni as a catalyst and cyclohexene or isopropanol as a hydrogen donor solvent. The results of the technical and environmental assessments showed that the extent of conversion for the unsaturation reaction was high (>99 %), and the environmental impact of the process could be significantly reduced to create a cleaner technology. It was found, after process optimization, that the remaining environmental impacts were negative (67.48 %), local (78.95 %), temporary (95.33 %), direct (80.12 %), and reversible (95.32 %).
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We gratefully acknowledge financial support provided by SCT-RS, FINEP and FAPERGS. We also would like to thank CNPq for providing scholarships to L.R.S.L and M.M.C., and the FAP/UNISC program for research support.
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de Cassia de Souza Schneider, R., Lara, L.R.S., Ceolin, M.M. et al. Environmental impact of castor oil catalytic transfer hydrogenation. Clean Techn Environ Policy 15, 977–985 (2013). https://doi.org/10.1007/s10098-012-0567-1
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DOI: https://doi.org/10.1007/s10098-012-0567-1