Abstract:

The isotherms and the adsorption amount of alkyl aryl sulfonates with five types of relative molecular mass(Mr) distribution were measured on the solid-liquid interface. The impacts of Mr, Mr distribution, adsorption temperature, and the inorganic salt on the adsorption of alkyl aryl sulfonate compounds on the oil sand/quartz sand surface were discussed, respectively. The results showed that the adsorption amount of the five types of alkyl aryl sulfonate compounds were decreased in the following order: the incremental distribution, normal distribution, reverse normal distribution, descending distribution, uniform distribution; while the adsorption amount of alkyl aryl sulfonate compounds on the oil sands surface increased with the increase of their Mr and the NaCl concentration, and decreased with the increase of the adsorption temperature. The effect of NaCl on the adsorption of the alkyl aryl sulfonate compounds on the oil sands surface was slightly greater than that on the quartz sands surface. Moreover, it was found that CaCl2, MgCl2, Na2SO4 etc. have a more significant effect on the adsorption amount than NaCl.

Key words: alkyl aryl sulfonates, compound system, Solid-liquid adsorption, oil sands, quartz sands, inorganic salt