Manufacture of aqueous formaldehyde

Details Manufacture of aqueous formaldehyde Manufacture of aqueous formaldehyde

1982-08-02

1984-06-12

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568472, C07C 4529, C07C 4704

Patent

active

044543549

ABSTRACT:
Formaldehyde manufacture by oxidative-dehydrogenation of methanol over a silver or copper catalyst. Aqueous formaldehyde solution is obtained from the reaction and is stripped of a mixture of methanol, formaldehyde and water by a low energy process at relatively low temperature and low reflux in a still comprising at least about 1.5 theoretical plates, the stripping conditions being selected to allow substantial reduction of the methanol content of the aqueous formaldehyde solution and recycle of the methanol to the reactor.

REFERENCES:
patent: 3113972 (1959-12-01), Kodama et al.
patent: 3174911 (1965-03-01), Webb et al.
patent: 3214891 (1965-11-01), Kloepper et al.
patent: 4119673 (1978-10-01), Aicher et al.
patent: 4343954 (1978-08-01), Hoene
patent: 4348540 (1982-09-01), Ferris et al.

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