Process for the production of formaldehyde from methane
Patent 4727198 Issued on February 23, 1988. Estimated Expiration Date: 
March 12, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 12, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesOxidizing methane to formaldehyde Process and catalyst for the production of formaldehyde from methane Patent #: 4607127 InventorAssigneeApplicationNo. 07/025043 filed on 03/12/1987US Classes:568/482, Methane reactant568/475Acyclic hydrocarbon reactantExaminersPrimary: Lone, Werren B.Attorney, Agent or FirmInternational ClassesC07C 45/00 (20060101)C07C 45/33 (20060101) B01J 23/22 (20060101) B01J 23/16 (20060101) AbstractFormaldehyde is made from methane and a molecular oxygen containing gas by using a silica supported catalyst having less than 350 parts per million by weight of sodium and having a catalytically effective amount of V2 O5. The low sodium form of the silica support can be made by washing silica gel or precipitated silica or by using a fumed silica. In general, the lower the sodium level, the better is the catalyst.Other References
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