High-efficiency metal membrane element, filter, and process for

Details High-efficiency metal membrane element, filter, and process for High-efficiency metal membrane element, filter, and process for

1994-07-27

1996-01-30

Spitzer, Robert

Gas separation

Specific media material

Ceramic or sintered

55502, 55503, 55DIG5, 419 2, 419 24, 419 39, B01D 4610, C22C 104

Patent

active

054877717

ABSTRACT:
A high-porosity metallic membrane element comprising a sintered element having at least about 55% porosity, the sintered element comprising a matrix of substantially interconnected pores, each of the pores being defined by a plurality of dendtritic metallic particles. A preferred form is made from pure nickel, preferably filamentous nickel powder. The high-porosity metallic membrane element, comprising the aforementioned sintered element having at least about 55% porosity, can be sealed within a filter housing to produce a highly porous filter device with a filtered fluid flow path through the metal membrane element. Also disclosed is a method of making the high-porosity metallic membrane element which includes depositing by air-laying techniques a substantially uniform low-density bed of a sinterable dendritic material into a mold suitable for applying compressive force thereto, compressing the low-density bed of sinterable dendritic material to form a green form, and sintering the green form. The present filter devices exhibit superior porosity and face velocities, negligible outgassing and limited particle shedding when compared to the devices of the prior art.

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