Non-ionic surfactants are compatible with different types of materials, therefore they can be applied in various packages. Fatty-acid derivates as non-ionic surfactants and their mixtures were investigated to study their colloidal behavior. The HLB value, the particle size, the emulsification capacity and the interfacial tension of various commercial, non-ionic surfactants, and their mixtures with sodium lauryl-ether-sulfate (SLES), were determined. The surfactant mixtures were prepared in different non-ionic: anionic surfactant ratios to examine their effect on several surfactant characteristics. The interfacial tension between the oil phase and aqueous phase was measured using the spinning drop method and the average hydrodynamic diameter of surfactants in the aqueous solution was determined using the dynamic light scattering method. The relationship between various colloidal properties of surfactants was investigated. It was found that there is a significant relationship between the colloidal characteristics and the structure of surfactants that can contribute to their efficient selection method.
Quantification of alkanolamines is imperative for health and chemical safety risk reasons. A fast method that requires less equipment has been developed for the determination of free diethanolamine in different types of additives. Repeatability tests were carried out. The free diethanolamine content of commercially available additives has been determined. We have recommended industrial applicability.
A kőolajmező olajkihozatalának növelésére megoldást adhatnak a harmadlagos kőolaj-kitermelési módsze- rek. Ezek közül elterjedtek a polimer-tenzides, elárasztásos műveletek. A polimerek és a tenzidek hatékony kiválasztása elengedhetetlen a sikeres harmadlagos kitermelési projekt kivitelezéséhez. A polimerek rész- letes szelekciója általában hosszadalmas feladat, ami számos vizsgálatot foglal magában. Célunk egy olyan laboratóriumi, gyors polimerszelekciós módszer megalkotása, amely alapján kiválasztható a várhatóan leg- ígéretesebb polimertípus. A polimerek oldhatóságának, az oldatok dinamikai viszkozitásának és a polimerek oldatbeli hidrodinamikai átmérőjének vizsgálatával kiválasztottuk a potenciálisan legjobb polimert.
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