Manufacture of aqueous formaldehyde

Details Manufacture of aqueous formaldehyde Manufacture of aqueous formaldehyde

1981-06-29

1982-09-07

Bascomb, Jr., Wilbur L.

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

Organic compounds

Oxygen containing

568473, 568493, 203 42, 203 49, 203 87, 203 98, 203DIG19, B01D 316, C07C 47055, C07C 47058

Patent

active

043485405

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 methanol and water by a low energy process at relatively low temperature by means of recycled inert gas in a stripping column comprising at least about 1.5 theoretical transfer units for stripping methanol.

REFERENCES:
patent: 2372540 (1945-03-01), Balcar
patent: 2565569 (1951-08-01), McCants
patent: 2675346 (1954-04-01), MacLean
patent: 2690994 (1954-10-01), McCants
patent: 3113972 (1963-12-01), Kodama et al.
patent: 3174911 (1965-03-01), Webb et al.
patent: 3493472 (1970-02-01), Schumacher
patent: 3994977 (1976-11-01), Aicher et al.
patent: 4119673 (1978-10-01), Aicher et al.

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