Filtering process

Details Filtering process Filtering process

1975-09-15

1977-02-22

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204302, B03C 500

Patent

active

040090892

ABSTRACT:
A process for separating finely divided, electrically conductive materials from hot liquid hydrocarbons. The process is particularly valuable in the treatment of a liquid hydrocarbon feed stock for a fixed bed catalytic process such as hydrodesulfurization of gas oils or heavier petroleum fractions, or for hydrocracking. The feed stock is made to flow longitudinally through a bed of spherical glass particles between electrodes. A voltage gradient of 5 to 25 kv per inch is applied to the electrodes. Periodically the filter is cleaned by backflushing with filtered product. The backflush liquid and entrained solids are delivered into a thickener consisting of a hollow vessel having a pair of vertical electrodes between which the backflush liquid is passed downwardly. Suspended particles aggregate and rapidly settle from the liquid.

REFERENCES:
patent: 2116509 (1938-05-01), Cottrell
patent: 2573967 (1951-11-01), Hamlin
patent: 3799856 (1974-03-01), Franse
patent: 3799857 (1974-03-01), Franse
patent: 3928158 (1975-12-01), Fritsche

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