Method for producing formaldehyde

Details Method for producing formaldehyde Method for producing formaldehyde

2008-06-03

2008-06-03

Witherspoon, Sikarl A. (Department: 1621)

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

Organic compounds

Oxygen containing

C568S474000, C568S487000

Reexamination Certificate

active

07381851

ABSTRACT:
A process for preparing formaldehyde by gas-phase oxidation of methanol vapor by means of a gas stream comprising molecular oxygen in the presence of a fixed-bed catalyst comprising iron and molybdenum, wherein the process is carried out in a reactor (1) having heat-exchange plates (2) which are arranged in the longitudinal direction of the reactor (1) and have a spacing between them and through which a heat transfer medium flows, inlet and outlet facilities (3, 4) for the heat transfer medium to the heat-exchange plates (2) and also gaps (5) between heat-exchange plates (2) in which the fixed-bed catalyst is present and into which the methanol vapor and the gas stream comprising molecular oxygen are passed, is described.

REFERENCES:
patent: 3152997 (1964-10-01), Natta et al.
patent: 3420783 (1969-01-01), Bergstrand
patent: 100 31 347 (2001-01-01), None
patent: 1 153 653 (2001-11-01), None
patent: 1 477 220 (2004-11-01), None
patent: 1080508 (1967-08-01), None
patent: WO-02/068110 (2002-09-01), None
Exner, W. et al., “Das Hiag/Lurgi-Formaldehyd-Verfahren”, CAV (1973), pp. 87-92.

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