Solvent de-ashing from heavy product of brown coal liquefaction using toluene: - 2. concentration and separation of ash with a continuous de-ashing system

Author： Okuma O.   Masuda K.   Okuyama N.   Hirano T.  

Publisher： Elsevier

ISSN： 0378-3820

Source： Fuel Processing Technology, Vol.56, Iss.3, 1998-08, pp. : 229-241

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