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US 12,746,536 B2Granted
Composite catalyst, method for producing composite catalyst, and method for producing lower olefins
AssigneeChiyoda Corporation
InventorsShinya Hodoshima, Azusa Motomiya
Life of this patent
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Abstract
Provided is a composite catalyst that contains a zeolite which is a crystalline aluminosilicate that contains gallium and iron and has a skeletal structure of an 8- to 12-membered ring; or a zeolite which is a crystalline aluminosilicate that contains iron but no gallium and has a skeletal structure of an 8- to 12-membered ring; silicon dioxide as a binder; and diphosphorus pentoxide.
Claims8
A composite catalyst comprising:
- a zeolite which is a crystalline aluminosilicate that contains gallium and iron, and has a skeletal structure of an 8- to 12-membered ring;
- silicon dioxide as a binder;
- and diphosphorus pentoxide,
- wherein the zeolite has an acid density, which is defined as a molar ratio of silicon relative to the sum of iron, gallium, and aluminum, of 75.0 to 200.0, has a molar ratio of gallium relative to the sum of iron, gallium, and aluminum, of 0.1 to 0.4, and has a molar ratio of iron relative to the sum of iron, gallium, and aluminum, of 0.2 to 0.6,
- wherein the silicon dioxide has a BET surface area of 380 to 400 m2/g.
2 more elements
A composite catalyst comprising:
- a zeolite which is a crystalline aluminosilicate that contains iron but no gallium, and has a skeletal structure of an 8- to 12-membered ring;
- silicon dioxide as a binder;
- and diphosphorus pentoxide,
- wherein the zeolite has an acid density, which is defined as a molar ratio of silicon relative to the sum of iron and aluminum, of 75.0 to 200.0, and has a molar ratio of iron relative to the sum of iron and aluminum, of 0.4 to 0.7,
- wherein the silicon dioxide has a BET surface area of 380 to 400 m2/g.
2 more elements
Dependencies are inferred from the claim text.