Manufacture of aqueous formaldehyde

Details Manufacture of aqueous formaldehyde Manufacture of aqueous formaldehyde

C - Chemistry, Metallurgy

07

C

260/572.4

C07C 47/055 (2006.01) C07C 45/38 (2006.01) C07C 45/78 (2006.01)

Patent

CA 1217203

MANUFACTURE OF AQUEOUS FORMALDEHYDE ABSTRACT Formaldehyde manufacture by oxidative-dehydro- genation of methanol over a silver or copper catalyst. Aqueous formaldehyde solution is obtained from the reaction and is substantially stripped of methanol by a low energy process at relatively low temperature by means of recycled off-gas in a stripping column comprising at least about 1.5 theoretical transfer units for stripping methanol.

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