Patent

3580. -----. [Hydrogenation With Suspended Iron Catalyst.] German Patent 764,166, no date; appl. St 61,199 (Cl.12 o-1.03). Auszüge deut. Patent-Anmeldungen, vol. 6, p. 362.

CO is catalytically hydrogenated with the catalyst in liquid suspension with continuous separation of liquid fractions by filtration.  Over the surface of the filter and at a distance of 1-20 mm. a scraper moves so fast that no particles of catalyst are deposited on the surface of the filter.