Thermally treated expanded perlite
AssigneeContech Engineered Solutions LLC
InventorJia Ma
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Abstract
A thermally treated expanded perlite that can be coated or impregnated with at least one active material and the use of the thermally treated expanded perlite as a light-weight filtration media. Methods for forming thermally treated expanded perlite as well as methods for forming thermally treated perlite coated or impregnated with an active material are also disclosed.
Claims15
A light-weight filtration media comprising thermally treated expanded perlite in the form of pellets wherein said thermally treated expanded perlite has a volume that is at least about 40% less than the volume of the expanded perlite prior to being subjected to thermal treatment so that an average particle size of the thermally treated expanded perlite pellets is between about 0.5 mm and about 12.5 mm, wherein said thermal treatment is conducted at one or more temperatures and for a time period sufficient to result in the reduction in volume.
A method of producing a light-weight filtration media comprising thermally treated expanded perlite in the form of pellets, the method comprising:
- thermally treating expanded perlite pellets to produce said thermally treated expanded perlite, wherein said thermally treated expanded perlite has a volume that is at least about 40% less than a volume of the expanded perlite pellets prior to being subjected to thermal treatment, wherein said thermal treatment is conducted at one or more temperatures and for a time period sufficient to result in the reduction in volume.
Dependencies are inferred from the claim text.