| abstract |
Process for recovering and causing highly viscous petroleum products to flow by means of an aqueous dispersion of the petroleum product, in which the dispersant is selected from alkali metal or ammonium salts of organic sulfonates having the following properties: (A) sulfur content of at least 10 %; (B) water solubility at 20 °C of at least 15 % by weight; (C) decrease in water surface tension, at a concentration of 1% by weight, not higher than 10 %. |