Process for preparing a sulphonated dispersant from...

Details Process for preparing a sulphonated dispersant from... Process for preparing a sulphonated dispersant from...

C - Chemistry, Metallurgy

07

C

134/56, 260/504.

C07C 303/06 (2006.01) B01F 17/00 (2006.01) B01F 17/12 (2006.01) C07C 309/28 (2006.01) C07C 309/62 (2006.01)

Patent

CA 2032838

CASE 3185 PROCESS FOR PREPARING A SULPHONATED DISPERSANT FROM PETROLEUM ASPHALT FRACTIONS. ABSTRACT A process for preparing a sulphonated dispersant from a petroleum asphalt Fraction, comprising: - establishing contact between the asphalt fraction dissolved in an inert solvent and liquid or gaseous sulphur trioxide at a temperature equal to or less than 60°C, to obtain a sulphonated asphalt fraction; - salifying the sulphonated asphalt fraction thus obtained by contact with an aqueous solution of a hydroxide of an alkaline metal, alkaline earth metal or ammonium and recovering the sulphonated salt from the reaction mixture. This process provides water-soluble sulphonated salts of petroleum asphalt tractions, which can be used as fluidifying and stabilizing agents for aqueous dispersions of solids, such as aqueous dispersions of coal or cement.

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