发明名称 |
VANADIA-TITANIA/METAL-MOLYBDATE DUAL CATALYST BED SYSTEM AND PROCESS USING THE SAME FOR METHANOL OXIDATION TO FORMALDEHYDE |
摘要 |
A process and a catalyst reaction zone comprising one or more fixed bed reactors for oxidizing methanol in a reactant gas feed stream to formaldehyde. According to one embodiment, the process comprises introducing the reactant gas feed stream into an upstream region containing a vanadia-titania first catalyst (substantially free of a volatile MoO3 species) under oxidizing conditions to form a partially oxidized reactant gas feed stream which is then introduced under oxidizing conditions into a downstream region containing a metal molybdate second catalyst to further oxidize any residual methanol contained therein. According to another embodiment, a fixed bed reactor comprising an upstream region and a downstream region containing the aforementioned vanadia-titania and metal molybdate catalysts, respectively, is utilized to implement the inventive process to yield a product gas stream containing formaldehyde preferably at a conversion of 85 % or more and a selectivity of 90 % or more. |
申请公布号 |
WO0222541(A2) |
申请公布日期 |
2002.03.21 |
申请号 |
WO2001US28354 |
申请日期 |
2001.09.13 |
申请人 |
GEORGIA PACIFIC CORPORATION;LEHIGH UNIVERSITY |
发明人 |
WACHS, ISRAEL, E.;BOURNE, RAY |
分类号 |
C07C45/38;C07C47/052 |
主分类号 |
C07C45/38 |
代理机构 |
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