Method for producing 2-methylbutyric acid having a reduced content of 3-methylbutyric acid from the secondary flows arising in the production of pentanoic acids
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United States of America Patent
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Feb 20, 2018
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Nov 14, 2014
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Dec 5, 2013
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Abstract
A process for preparing 2-methylbutyric acid having a reduced content of 3-methylbutyric acid from the secondary streams obtained in the preparation of pentanoic acids, includes generating a stream enriched with 2-methylbutanal and 3-methyl-butanal. The stream enriched with 2-methylbutanal and 3-methylbutanal of step is reacted with formaldehyde. The reaction with formaldehyde is followed by removal of the organic phase and selective hydrogenation in the presence of a hydrogenation catalyst with hydrogen at elevated temperature and elevated pressure and, after removal of the hydrogenation catalyst, treatment of the hydrogenation output obtained with an oxidizing agent.
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