Claims
- 1. A method for forming catalytically active metal-molybdate surfaces effective for methanol oxidation to formaldehyde comprising the steps of:
forming a fixed bed of solids comprising a particulate source of metal oxide and a particulate source of molybdenum oxide; and passing a reactant stream containing methanol and oxygen through said fixed bed at conditions suitable for conversion of methanol to formaldehyde wherein catalytically active metal-molybdate is formed within said fixed bed.
- 2. A method according to claim 1 wherein said particulate source of metal oxide is selected from oxides of iron, lead, cadmium, zinc, bismuth, sodium, manganese, gadolinium, magnesium, copper, cobalt, tellurium, aluminum, chromium, nickel, and combinations thereof.
- 3. A method according to claim 1 wherein said catalytically active metal-molybdate formed within said fixed bed is Fe2(MoO4)3, PbMoO4, CaMoO4, Bi2Mo2O9, Bi3(FeO4)(MoO4)3, Na2MoO4, Na2Mo2O7, MnMoO4, Gd2(MoO4)3, MgMoO4, CuMoO4, CoMoO4, Te2MoO7, Al2(MoO4)3, Cr2(MoO4)3, NiMoO4, or ZnMoO4.
- 4. A method for forming catalytically active iron-molybdate surfaces effective for methanol oxidation to formaldehyde comprising the steps of:
forming a fixed bed of solids comprising a particulate source of iron oxide and a particulate source of molybdenum oxide; and passing a reactant stream containing methanol and oxygen through said fixed bed at conditions suitable for conversion of methanol to formaldehyde wherein catalytically active Fe2(MoO4)3/MoO3 is formed within said fixed bed.
- 5. A method according to claim 4 wherein said conditions comprise a temperature within the range from about 150°-500° C.
- 6. A method according to claim 4 wherein said particulate source of iron comprises ferric oxide.
- 7. A method according to claim 4 wherein said particulate source of molybdenum oxide comprises molybdenum trioxide.
- 8. A method for forming formaldehyde from methanol and oxygen comprising: contacting a reactant stream containing methanol and oxygen at methanol conversion conditions with a catalyst composition comprising a particulate source of iron oxide and a particulate source of molybdenum oxide.
- 9. A method according to claim 8 wherein said methanol conditions comprise a temperature within the range from about 150°-500° C.
- 10. A method according to claim 8 wherein said particulate source of iron oxide comprises powdered ferric oxide.
- 11. A method according to claim 8 wherein said particulate source of molybdenum oxide comprises molybdenum trioxide.
- 12. A method according to claim 8 wherein said reactant stream further contains an inert gas.
- 13. A catalyst composition made by a process comprising the steps of:
forming a fixed bed of solids comprising a particulate source of metal oxide and a particulate source of molybdenum oxide; and passing a reactant stream containing methanol and oxygen through said fixed bed at conditions suitable for conversion of methanol to formaldehyde wherein catalytically active metal-molybdate is formed within said fixed bed.
- 14. A composition according to claim 13 wherein said particulate source of metal oxide is selected from oxides of iron, lead, cadmium, zinc, bismuth, sodium, manganese, gadolinium, magnesium, copper, cobalt, tellurium, aluminum, chromium, nickel, and combinations thereof.
- 15. A composition according to claim 13 wherein said catalytically active metal-molybdate formed within said fixed bed is Fe2(MoO4)3, PbMoO4, CaMoO4, Bi2Mo2O9, Bi3(FeO4)(MoO4)3, Na2MoO4, Na2Mo2O7, MnMoO4, Gd2(MoO4)3, MgMoO4, CuMoO4, CoMoO4, Te2MoO7, Al2(MoO4)3, Cr2(MoO4)3, NiMoO4, or ZnMoO4.
- 16. A catalyst composition made by a process comprising the steps of:
forming a fixed bed of solids comprising a particulate source of iron oxide and a particulate source of molybdenum oxide; and passing a reactant stream containing methanol and oxygen through said fixed bed at conditions suitable for conversion of methanol to formaldehyde wherein catalytically active Fe2(MoO4)3/MoO3 is formed within said fixed bed.
Parent Case Info
[0001] This application claims the priority benefits from the U.S. provisional application Serial No. 60/081,950 filed Apr. 15, 1998.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60081950 |
Apr 1998 |
US |
Divisions (1)
|
Number |
Date |
Country |
Parent |
09287021 |
Apr 1999 |
US |
Child |
09984980 |
Oct 2001 |
US |