SOx control compositions
AssigneeW. R. Grace & Co.-Conn.
InventorGwan Kim
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Abstract
A composition comprising a coprecipitated magnesia-lanthana-alumina (MgO-La.sub.2 O.sub.3 -Al.sub.2 O.sub.3) wherein the MgO component is present as microcrystalline phase, having a BET (N.sub.2) surface area of at least 130 m.sup.2 /g, preferably combined with a catalytic oxidation and/or reducing promoter metal such as ceria, vanadia and/or titania.
Claims20
A coprecipitated ternary oxide composition having the formula:
- 30 to 50 MgO/5 to 30 La.sub.2 O.sub.3 /30 to 50 Al.sub.2 O.sub.3 wherein the amounts of MgO, La.sub.2 O.sub.3 and Al.sub.2 O.sub.3 are expressed as weight percent, and the MgO is present as a microcrystalline component.
In a method for preparing attrition resistant inorganic oxide particles wherein aqueous solutions of aluminum and magnesium salts are reacted to form an aqueous slurry of hydrous oxide coprecipitate, and the coprecipitate is washed to remove soluble salts and spray dried to obtain discrete particles, the improvement comprising washing the particles subsequent to spray drying.
Dependencies are inferred from the claim text.