PROCESS FOR THE DESALINATION OF COAL TARS AND COAL-TAR PITCHES

Coal tars and coal-tar pitches can be desalted with water and a gas containing carbon dioxide when the system is in the supercritical state. When carrying out the washing process in a single stage, then the chlorides are removed almost completely and zinc salts in amounts exceeding 50%. All the resi...

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Bibliographische Detailangaben
Hauptverfasser:	JAUMANN, WOLFGANG, BENEKE, HERBERT, OBERKOBUSCH, RUDOLF, PETER, SIEGFRIED, ALSCHER, ARNOLD
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY FUELS LUBRICANTS METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES PYROLIGNEOUS ACID TECHNICAL GASES CONTAINING CARBON MONOXIDE WORKING-UP PITCH, ASPHALT, BITUMEN, TAR
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Beschreibung
Zusammenfassung:	Coal tars and coal-tar pitches can be desalted with water and a gas containing carbon dioxide when the system is in the supercritical state. When carrying out the washing process in a single stage, then the chlorides are removed almost completely and zinc salts in amounts exceeding 50%. All the resins remain in the tars or pitches. In a multistage washing process the separation of salts can even be improved.