Solubilization characteristics of paraffin oil in different types of surfactants

Solubilization characteristics of paraffin oil in water were studied in presence of three types of surface active agents at 25°C. The solubilization process was discussed based on several factors including chemical structure of the used surfactants, chemical structure of solubilizate [carbon distribution of the used paraffin oil], and surface activities of the tested surfactants including critical micelle concentration [cmc] and aggregation number [n]. The solubilization time relationship showed that the chemical structure of surfactant molecules was the most effective factor influencing the solubilization process. In addition, the steps of solubilization process were discussed using the paraffin-surfactants solubilization extent profile

Characterization of triethanolammonium bromide mono-and dibenzoate as cationic surfactants

Novel series of triethanolammonium mono- and dibenzoate bromide cationic surfactants containing different alkyl chains were synthesized. Their surface parameters including, surface tension [gamma], critical micelle concentration [CMC], effectiveness [lambada pi[cmc]], maximum surface excess gamma and minimum surface area [A [min]] were caiculated at 25 degree sign C. Increasing the number of methylene groups in the hydrophobic chains [tails] increases the surface parameters, which decreases the surface tension of these surfactants in their solutions. Energetic parameters of micellization and adsorption of these surfactants in their solutions were also calculated at 25 degree sign C. The results of thermodynamic calculations showed the tendency of these surfactant molecules towards adsorption at the air/water interfaces rather than the micellization in the bulk of their solutions. The surface and energetic parameters were correlated to the ability of these surfactants towards adsorption at the interfaces

Influence of structure of the cationic polytriethanol ammonium bromide derivatives. II. corrosion inhibition

A series of alkyl polytriethanolammonium bromide derivatives were synthesized and evaluated as corrosion inhibitors using the weight loss method at 25°C. The applicability of these inhibitors was examined using [2M HCl] at 50, 100 and 200 ppm of inhibitor concentrations. The results were correlated to their surface and thermodynamic parameters of adsorption. The results obtained from emulsification and solubilization measurements showed the ability of using these compounds as corrosion inhibitors in oilfields without any risk for occurrence of emulsification or solubilization processes