Abstract
Quantitative dependence of the amount of impurities in commercial 1,4-butanediol that affect the carbonyl number, γ-hydroxybutyraldehyde and its acetate with 1,4-butanediol, on the service life of the catalyst was determined. Hydrazine hydrate, 2,4-dinitrophenylhydrazine, and hydroxylamine hydrochloride were studied as reagents binding these impurities and raising the content of the main substance in the target product. A procedure is suggested for obtaining purified 1,4-butanediol. The optimal reagent is a mixture of a 30% aqueous solution of hydrazine hydrate with hydrochloric acid.
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US Patent 4294998.
Pyatnitsyna, E.V., El’chaninov, M.M., and Savost’yanov, A.P., Russ. J. Appl. Chem., 2011, vol. 84, no. 8, pp. 1448–1450.
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Original Russian Text © E.V. Pyatnitsyna, I.M. El’chaninov, M.M. El’chaninov, 2014, published in Zhurnal Prikladnoi Khimii, 2014, Vol. 87, No. 1, pp. 110–113.
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Pyatnitsyna, E.V., El’chaninov, I.M. & El’chaninov, M.M. Chemical method for removal of impurities impairing the quality of commercial 1,4-butanediol produced by the reppe method. Russ J Appl Chem 87, 104–107 (2014). https://doi.org/10.1134/S1070427214010157
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DOI: https://doi.org/10.1134/S1070427214010157