US 5,627,123 AGranted

Sox control compositions

AssigneeW. R. Grace & Co.-Conn.

InventorGwan Kim

Life of this patent

Estimating the term…

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.

Claims7

Dependent claims

A coprecipitated ternary oxide composition having the formula:

30 to 50 MgO/5 to 30 RE.sub.2 O.sub.3 /30 to 50 Al.sub.2 O.sub.3
wherein (1) the amounts of MgO, RE.sub.2 O.sub.3 and Al.sub.2 O.sub.3 are expressed as weight percent, (2) RE.sub.2 O.sub.3 is La-rich rare earth oxide, and (3) the MgO is present as a microcrystalline component.

Dependencies are inferred from the claim text.

Facts

Application: 08/368,923Filed 5 Jan 1995 · continuation
Priority: 5 Feb 1992
Granted: 6 May 1997
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B01J 37/04
Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts: mixing
B01J 23/10
Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00: of rare earths
B01J 23/22
Vanadium, niobium or tantalum: vanadium
B01J 23/63
Platinum group metals: with rare earths or actinides

Family

Serial831,610Parent of this division · filed 5 Feb 1992
Serial182,468Parent of this continuation · filed 18 Jan 1994
US 5,399,327 AParent of this continuation
US 5,288,675 AParent of this division
US 5,627,123 AThis patent

From the US filing history. Foreign family members aren’t listed.

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