Process for the desalination of coal tars and coal-tar pitches

Details Process for the desalination of coal tars and coal-tar pitches Process for the desalination of coal tars and coal-tar pitches

C - Chemistry, Metallurgy

10

C

196/37

C10C 1/20 (2006.01) C10C 1/00 (2006.01) C10C 1/18 (2006.01) C10C 3/02 (2006.01) C10C 3/08 (2006.01)

Patent

CA 1285897

ABSTRACT OF THE DISCLOSURE 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 multi- stage washing process the separation of salts can even be improved.

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