| abstract |
The present invention relates to a kind of method of preparing anhydrous formaldehyde. The method is using carbon-based material or the composite of metal and carbon-based material as catalyst. Detailed process is: adopt fixed bed or fluidized-bed reactor, and micro-sampling pump charging methyl alcohol, charging air speed is: 10-60ml/ (gs), reaction at 200 DEG C-900 DEG C, methanol conversion is: 60%-80%, formaldehyde yield: 45%-70%. The method of preparing anhydrous formaldehyde involved in the present invention, catalyst preparation is simple, and stability is high, and reaction condition is comparatively gentle, need not at high temperature carry out, and the conversion ratio of methyl alcohol and the yield of formaldehyde are all higher. |