초록 ▼

Finely divided composite materials are provided comprising a first metal oxide (e.g., MgO) at least partially coated with an extremely thin layer of a second metal oxide such as Fe.sub.2 O.sub.3. The composites have a high surface area and are very effective for the destructive adsorption of undesir

Finely divided composite materials are provided comprising a first metal oxide (e.g., MgO) at least partially coated with an extremely thin layer of a second metal oxide such as Fe.sub.2 O.sub.3. The composites have a high surface area and are very effective for the destructive adsorption of undesirable fluids in gaseous or liquid form, such as chlorocarbons and chlorofluorocarbons. In use, a fluid stream including undesirable fluids are contacted with the composites of the invention, such as through the use of a filter containing the composite as a part of the filter media thereof.

대표청구항 ▼

[ We claim:] [12.] A composite material comprising particles of a first metal oxide selected from the group consisting of MgO, CaO, Al.sub.2 O.sub.3, SnO.sub.2, TiO.sub.2 and mixtures thereof, said particles being at least partially coated with a quantity of a second metal oxide selected from the gr

[ We claim:] [12.] A composite material comprising particles of a first metal oxide selected from the group consisting of MgO, CaO, Al.sub.2 O.sub.3, SnO.sub.2, TiO.sub.2 and mixtures thereof, said particles being at least partially coated with a quantity of a second metal oxide selected from the group consisting of Fe.sub.2 O.sub.3, Cu.sub.2 O, CoO and mixtures thereof, said composite having an average particle size of up to about 21 nm and an average surface area of from about 300-500 m.sup.2 /g.