Chemistry: electrical and wave energy – Apparatus – Coating – forming or etching by sputtering
Patent
1978-11-01
1980-09-23
Tufariello, T. M.
Chemistry: electrical and wave energy
Apparatus
Coating, forming or etching by sputtering
C10G 3302
Patent
active
042241359
ABSTRACT:
A filter for clarifying carbonaceous liquids containing finely divided solid particles of, for instance, unreacted coal, ash and other solids discharged from a coal liquefaction process is presented. The filter includes two passageways separated by a porous filter medium. In one preferred embodiment the filter medium is of tubular shape to form the first passageway and is enclosed within an outer housing to form the second passageway within the annulus. An electrode disposed in the first passageway, for instance along the tube axis, is connected to a source of high voltage for establishing an electric field between the electrode and the filter medium. Slurry feed flows through the first passageway tangentially to the surfaces of the filter medium and the electrode. Particles from the feed slurry are attracted to the electrode within the first passageway to prevent plugging of the porous filter medium while carbonaceous liquid filters into the second passageway for withdrawal. Concentrated slurry is discharged from the first passageway at an end opposite to the feed slurry inlet. Means are also provided for the addition of diluent and a surfactant into the slurry to control relative permittivity and the electrophoretic mobility of the particles.
REFERENCES:
patent: 2640026 (1953-05-01), Whittington
patent: 2925372 (1960-02-01), Keehn
patent: 3891528 (1975-06-01), Griswold
patent: 4066526 (1978-01-01), Yeh
Gidaspow Dimitri
Lee Chang H.
Wasan Darsh T.
Denny James E.
Glenn Hugh W.
Jackson Frank H.
The United States of America as represented by the United States
Tufariello T. M.
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