PROCESS FOR PREPARING A SULPHONATED DISPERSANT FROM PETROLEUM ASPHALT FRACTIONS

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 DEG C, to obtain a sulphonated asphalt frac...

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Bibliographic Details
Main Authors ALDO PREVEDELLO, EDOARDO PLATONE, ELIO DONATI
Format Patent
LanguageEnglish
Published 30.10.1991
Edition5
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL
ADHESIVES
CHEMISTRY
DYES
FIRELIGHTERS
FUELS
FUELS NOT OTHERWISE PROVIDED FOR
LIQUEFIED PETROLEUM GAS
LUBRICANTS
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL GAS
NATURAL RESINS
ORGANIC CHEMISTRY
PAINTS
PEAT
PETROLEUM, GAS OR COKE INDUSTRIES
POLISHES
SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K
TECHNICAL GASES CONTAINING CARBON MONOXIDE
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Summary: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 DEG 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 fractions, which can be used as fluidifying and stabilizing agents for aqueous dispersions of solids, such as aqueous dispersions of coal or cement.
Bibliography:Application Number: ZA19900010010