Liquid purification or separation – Processes – Separating
Patent
1988-08-04
1989-12-26
Fisher, Richard V.
Liquid purification or separation
Processes
Separating
210186, 210436, 210167, 34 77, 34 78, B01D 3700
Patent
active
048896420
ABSTRACT:
A method and filtration apparatus for purifying solvents. Impurities present in the solvent are separated out in the filtration apparatus via filtration using at least one filter, through which the solvent flows and upon which the impurities settle as a filter cake. At least prior to the removal of the impurities that form the filter cake from the filtration apparatus, solvent residues present in the filter cake and possibly also in the filter are recovered by evaporation. The solvent residues in the filtration apparatus are vaporized by the action of a hot, gaseous medium that is conveyed first through the filter and only then through the filter cake, i.e. the impurities, in the direction opposite to the direction in which the solvent flowed through the filtration apparatus during the filtration process.
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Fisher Richard V.
Nessler Cynthia L.
SEITZ ENZINGER NOLL Maschinenbau Aktiengesellschaft
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