Multicapillary monolith
OwnerFrancois Parmentierinventor
Life of this patent
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Abstract
The invention relates to a monolithic porous material made of amorphous silica or activated alumina, comprising substantially rectilinear capillary channels that are parallel to one another, wherein: the channels have a substantially uniform cross-section relative to each other, the cross-section of each channel is regular over its entire length, the channels pass through the material from end to end, the length of the channels is equal to or more than 10 mm. The invention also relates to an annular, radial or axial chromatographic apparatus, the packing of which consists of at least one said monolithic material. The invention also relates to processes for manufacturing such a monolithic material.
Claims19
A monolithic porous material based on amorphous silica or activated alumina, comprising substantially rectilinear capillary channels parallel to one another, wherein:
- the channels have a substantially uniform cross-section relative to each other,
- the cross-section of each channel is regular over its entire length,
- the channels pass through the material from end to end,
- the length of the channels is equal to or more than 10 mm.
A process for preparing a monolithic porous material based on amorphous silica or activated alumina comprising substantially rectilinear capillary channels parallel to one another, comprising the steps of:
- providing a bundle of so-called channel precursor fibres whose diameter is equal to the diameter of the capillary channels,
- forming a porous matrix of amorphous silica or activated alumina around the fibres,
- eliminating the fibres so as to form said capillary channels in said matrix.
A process for preparing a monolithic porous material of amorphous silica comprising substantially rectilinear capillary channels parallel to one another, comprising the steps of:
- forming conduits in at least one sheet of a silicone elastomer,
- stacking or rolling this or these sheets so as to close the conduits to form capillary channels,
- pyrolysis and oxidation of the silicone to amorphous silica.
Dependencies are inferred from the claim text.