期刊名称：Eastern-European Journal of Enterprise Technologies
印刷版ISSN：1729-3774
电子版ISSN：1729-4061
出版年度：2017
卷号：6
期号：6
页码：4-9
DOI：10.15587/1729-4061.2017.118784
语种：English
出版社：PC Technology Center
摘要：The alkylphenol Mannich bases (N-(4-methylphenyl)-N,N-bis-(3,5-di-tert-butyl-4-hydroxybenzyl)amine, N,N-dibenzyl-N-(3,5-di-tert-butyl-4-hydroxybenzyl)amine and tris-(3,5-di-tert-butyl-4-hydroxybenzyl)amine), which are promising antioxidants for fuels and lubricants, were synthesized by condensation of 2,6-di-tert-Butylphenol with formaldehyde and amines (n-toluidine, dibenzylamine and ammonia). Mannich bases also were synthesized by condensation of alkylphenols with diethylenetriamine.The induction periods of the fuels and lubricants oxidation on the example of the vaseline oil at a temperature of 200 oC were determined by the method of oxygen absorption for the obtained Mannich bases and stable nitroxyl radicals (in particular 2,2,6,6-tetramethyl-4-oxopiperidin-1-oxyl and di-(2,2,6,6-tetramethyl-1-oxyl-4-piperidyl)isophthalate). It was found that in the case of the inhibited oxidation of hydrocarbons of fuels and lubricants, even at high temperatures (~200 oC), there is also a synergetic effect of stable nitroxyl radicals with the nitrogen-containing compounds, including the alkylphenol Mannich bases, which have −NH or β-CH< groups in relation to Nitrogen. So, the obtained results confirm the perspectiveness of the alkylphenol Mannich bases usage as the high-temperature oxidation inhibitors for fuels and lubricants (motor fuels and oils).
关键词：Mannich base;additive;additives to fuels and lubricants;antioxidant;stable nitroxyl radicals.
