Abstract:
A review of the authors' own works devoted to the development of «green» methods of chemistry in the
synthesis of various derivatives of monoethanolamine and diethanolamine, which are potential surface active
substances and flotation agents, is made up. It is shown that the application of the «green» chemistry
principles, for example, implication of 5 molar % an organic phase transfer catalyst — tetrabutylammonium
iodide in alkylation reactions makes it possible to significantly increase (in two to three times) the yields of
target substances N-alkylated derivatives of diethanolamine and monoethanolamine with a tenfold reduction
in the duration of reactions and a lowering of the process temperature, which leads to a significant reduction
in energy and labor costs. Synthesis of target flotation agents, for example, O-2-((dimethoxyphosphoryl)-
(2-hydroxyethyl)amino)ethylxanthate and sodium 2-dimethoxyphosphoryloxyethyl carbamate by the atomeconomic
method — four-component reaction of the one-reactor interaction with a reduction in the number
of stages from two to one also contributes to an increase in the total yield of target substances by 2–3 times.
