| 摘要 |
A process for converting methanol to formaldehyde wherein methanol along with a stream containing air, water, methanol and formaldehyde is fed to a primary reactor 5 containing a silver catalyst maintained at from 630 DEG to 650 DEG C. The effluent from the primary reactor 5 is cooled and fed along with a stream containing air, water, methanol and formaldehyde to a secondary reactor 9 containing a metal oxide catalyst, such as iron oxide-molybdenum oxide. The secondary reactor 9 is maintained at from 325 DEG to 400 DEG C. The product from the secondary reactor is fed to an absorber 11 which is cross connected top and bottom with a stripper 13. Water is fed to the absorber to absorb formaldehyde and the product solution of formaldehyde and water is removed from the absorber. Air is fed to the stripper and the effluent from the stripper which contains air, water, methanol and formaldehyde is fed to both the primary reactor 5 and the secondary reactor 9.
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