Porous inorganic materials

Details Porous inorganic materials Porous inorganic materials

B - Operations, Transporting

01

J

6/212, 252/33

B01J 20/16 (2006.01) D21H 17/68 (2006.01)

Patent

CA 1253129

ABSTRACT A particulate porous material suitable for use as a high surface area column packing material comprises particles substantially all of which are not smaller than 5 micrometres and not larger than 1 millimetre in diameter, and each particle consists predominantly of an open, three-dimensional matrix of crystals of mullite, which are preferably substantially uniform in size and define between them interconnecting pores having a width in the range of from 5nm to about 2µm. The particles can be coated with a reactive layer. There is also disclosed a process for producing the particulate porous material wherein a particulate product comprising particles substantially all of which are between 5 micrometres and 1 millimetre in diameter and consisting predominantly of a mixture of mullite crystals and silica is treated with a concentrated aqueous solution of an alkali metal hydroxide at a temperature of at least 50°C; and the treated particulate product is then washed, dewatered and dried.

473807

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