Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1981-04-28
1982-08-10
Lone, Werren B.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568472, 568474, C07C 47052
Patent
active
043439543
ABSTRACT:
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.degree. to 650.degree. 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.degree. to 400.degree. 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.
REFERENCES:
patent: 2462413 (1949-02-01), Meath
patent: 2519788 (1950-08-01), Payne
patent: 3959383 (1976-05-01), Northeimer
patent: 4119673 (1978-10-01), Aicher et al.
E. I. Du Pont de Nemours and Company
Lone Werren B.
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