Mixed-metal oxide absorbent for carbon dioxide and water removal

Gas separation – Means within gas stream for conducting concentrate to collector

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55 68, 55 74, 55387, 502343, 502400, 502515, B01D 5304

Patent

active

051867273

ABSTRACT:
Mixed-metal oxide absorbents having superior CO.sub.2 and water removal capacity and superior regenerability are prepared from novel mixed-metal carbonate precursors or from mixed-metal oxides derived from those precursors. The precursors are prepared from a salt of silver and the salt of a second metal. The second metal may be selected from the group consisting of magnesium, iron, cobalt, nickel, zinc, and other metals for which the metal carbonate to metal oxide reaction occurs at a temperature of not greater than about 400.degree. C. The precursors have an unique x-ray diffraction pattern characteristic of the silver carbonate pattern rather than of the physical mixture of the silver carbonate and the carbonate of the second metal.

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