Synthesis and Properties of Non-Ionic Surface-Active Substances Based on Heptadecanoic Acid and Propylene Oxide

Abstract

By interaction of heptadecanoic acid (HDA) with propylene oxide (PO) under the catalytic action of potassium hydroxide, esters with varied content of epoxide units in the heterochain were synthesized. The identification of the final products was carried out using IR and electroconductometry methods. Tensiometric measurements made it possible to specify high surface activity of the obtained esters on the water-air interface and identify the values of critical micelle concentration (CMC). Laboratory tests revealed a good oil-collecting and oil-dispersing ability of the synthesized propoxylates with respect to environmentally harmful thin oil films on the surface of waters with a wide range of mineralization degree. The kinetics of the reaction was retraced by manometric method, the general equation of the reaction rate was received and the values of the main kinetic parameters obtained (rate orders for individual components, initial rates, rate constants, activation energy and pre-exponential factor).

Obtaining and Study of Oligomeric Surfactant Based on Octadecylamine and Oxypropylene

“…3, the surface activity parameters were calculated and given in Table 1. Critical micelle concentrations (CMC) of the oligomer were revealed as 1.58* 10 -4 mol/l and the values of π CMC , Γ max and A min were calculated by using followin equations [5][6]:…”

“…As a result, million tons of crude oil and petro products damage the soil and water. One of the well-known methods is to use surfactants in order to clean surface of the water from thin layers of crude oil [1][2][3][4][5][6].…”