Purification of hydride gases
View Patent ↗Purification material for removing a contaminant from an impure hydride gas comprising an adsorbent comprising a reduced metal oxide on a porous support and a desiccant. The porous support may be selected from the group consisting of activated carbon, alumina, silica, zeolite, silica alumina, titania, zirconia, and combinations thereof. The reduced metal oxide may comprise one or more metals selected from the group consisting of Group I alkali metals (lithium, sodium, potassium, rubidium, and cesium), Group II alkaline earth metals (magnesium, calcium, strontium, and barium), and transition metals (manganese, nickel, zinc, iron, molybdenum, tungsten, titanium, vanadium, cobalt, and rhodium). The desiccant may be selected from the group consisting of hygroscopic metal salts, zeolites, single metal oxides, mixed metal oxides, and combinations thereof.
1. In a process for purifying a hydride gas by removing contaminant oxygen from said hydride gas which comprises the step of contacting said hydride gas with a reduced metal oxide, the improvement which comprises:
contacting said hydride gas with a reduced metal oxide carried on a porous support, wherein the reduced metal oxide carried on the porous support is selected from the group consisting of manganese oxide impregnated on porous carbon, manganese oxide impregnated on porous activated alumina, an alkali metal oxide impregnated on porous activated alumina, and an alkaline earth metal oxide impregnated on porous activated alumina.
2. The process of claim 1 wherein the alkali metal is selected from the group consisting of cesium, potassium and sodium.
3. The process of claim 1 wherein a desiccant is employed to assist in the removal of water, if generated, in the removing of the contaminant oxygen.
4. The process of claim 1 wherein the metal oxide is manganese oxide and the manganese oxide is impregnated on activated alumina.
5. The process of claim 1 wherein the metal oxide is manganese oxide, the manganese oxide is impregnated on a carbon support, and a desiccant is included to remove any water that may be generated during the removing of the contaminant oxygen.