Study of the Oil-Collecting Properties of Cationic Salts

Octylamine, nonylamine, dodecylamine, and hexadecylamine were reacted with ethylenechlorohydrin in equimolar proportions, and the cationic salts octylethylammonium chloride (OEAC), nonylethylammonium chloride (NEAC), dodecylethylammonium chloride (DDEAC), and hexadecylethylammonium chloride (HDEAC) were obtained, respectively. The composition and structure of the salts obtained were identified by IR and UV spectroscopy methods. The specific electrical conductivity of aqueous solutions of the salts obtained by the electron conductometric method was measured, and their electrolyte nature was determined. The surface tension values of the cationic salts were calculated at the air boundary in a tensiometer. It was shown that all four of the salts are surfactants. It was determined that as the length of the alkyl radical in the cationic increases, its surface activity increases. The oil-collecting abilities of OEAC, NEAC, DDEAC, and HDEAC cationic salts were studied in laboratory conditions. In the conducted studies, oil (Pirallahi field oil) was poured onto 3 types of water with different mineral content - distilled, fresh water, and seawater, and formed a thin layer. It was determined that cationic salts demonstrate high oil-collecting abilities both in the form of 100% product and 5% solution. It was shown that in all cases the oil-collecting ability of 100% products is superior to that of aqueous solutions. The oil-accumulating abilities of OEAC and DDEAC salts and their aqueous solutions are the same. The oilaccumulating abilities of the first and third cationic salts among NEAC, DDEAC, and HDEAC are higher. The oilcollecting abilities of OEAC and DDEAC salts and their aqueous solutions lag behind those of the HDEAC salt. It was concluded that an increase in the length of the alkyl radical in the salt composition has a positive effect on the oilaccumulating ability.