Union Rheinische Braunkohlen Kraftstoff Aktiengesellschaft

Rheinische Braunkohlenwerke Ag

Wilfried Dolkemeyer

Ewald Meisenburg

Kurt Erdt

Rene Hentges

Karl-Heinz Keim

Process for the production of pumpable coal slurries

This invention relates to carbon black obtained from an aqueous suspension. A practically water-free carbon black is obtained from aqueous suspensions by mixing the suspension with liquid low-boiling hydrocarbons, then expanding the mixture in a vessel to evaporate the hydrocarbons, then drawing off separately the hydrocarbon vapors carrying the carbon black and the remaining liquid aqueous phase from the vessel, and separating the carbon black from the hydrocarbon vapors.

Carbon black obtained from aqueous suspensions

This invention relates to a process for obtaining carbon black from aqueous suspension. A practically water-free carbon black is obtained from aqueous suspensions by mixing the suspension with liquid low-boiling hydrocarbons, then expanding the mixture in a vessel to evaporate the hydrocarbons, then drawing off separately the hydrocarbon vapors carrying the carbon black and the remaining liquid aqueous phase from the vessel, and separating the carbon black from the hydrocarbon vapors.

Process for obtaining carbon black from aqueous suspensions

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Bornheim-Uedorf, Germany

Wilfried Dolkemeyer