Impregnation of Crushed Stone with Bitumenous Compounds Using Propane/Butane Impregnation Process Carried out in Supercritical Fluid Conditions

Impregnation of Carbonate Rock with Bituminous Compounds. II. Improvement of the Impregnation Material

“…The photographs of cross-section of the rock samples. (a) Impregnated with the use of deasphaltizate, produced without steam-thermal treatment [6]; (b) Impregnated with the heavy residue, produced under the steam-thermal method for the treatment of highly viscous oil.…”

“…A detailed description of the complex process for deasphaltizing of heavy oil residue and subsequent SCFimpregnation of rock by deasphaltizate is given in [6].…”

“…In publication [6] a complex process is suggested for deasphaltizing of heavy oil residue and subsequent impregnation (using a solvent in SCF state) of carbonate rock by deasphaltizate in order to improve the functional characteristics of the latter. As a result of the uniform impregnation, inaccessible for traditional methods, such important characteristic as water absorption has decreased from 3.6% to 0.54%.…”

Disposal of oil sludge with the use of liquid and supercritical fluid extraction processes with propane-butane extractant

“…2) at low pressures (7-9 MPa for carbon dioxide and 5 MPa for propane-butane) in the area of solvent's transition from liquid to supercritical fluid state [Gumerov et al, 2000]. Another example is the study of SCF-impregnation process of carbonate rock proposed by the authors [Gumerov et al, 2014].…”

Synthesis of the Palladium Catalyst with the Supercritical СO2-Impregnation Method Realized in the Static Mode

“…The character of the change of the solubility of the model substance in the on isobars in the super-critical fluid solvent and the crossover points[18] [19].…”