1691. ------. [INTERNATIONAL HYDROCARBON SYNTHESIS CO.] [Paraffins Boiling Above 320° Synthesized From Carbon Monoxide and Hydrogen.] Netherlands Patent 57,692, June 15, 1946. Chem. Abs., vol. 41, 1947, p. 4634.

Catalyst is the main point. It contains at least 200 gm. per 1. of Co (200 gm. of Co per 1. of finished catalyst), generally 40-80% by wt. of all the catalyst and MnO as an activator, namely 5-25% of the Co. It is made by precipitation of a solution containing Co and Mn. In an example, 25 gm. Co and 3.75 gm. Mn were dissolved as nitrates in 500 cc. H₂O; this was heated to boiling and vigorously stirring added to a boiling solution of 61 gm. Na₂CO₃ in 750 cc. H₂O. Immediately after precipitation 3.5 gm. diatomaceous earth, washed with acid and calcined, was stirred in. The precipitate was sucked off and washed with 3 1. hot H₂O, then dried in air, reduced at 400° 1 hr. with a H₂-N₂ mixture, and put into use at 160° and 10 atm. The intake was 10 1. synthetic gas per 100 cc. catalyst per hr. If 75% CO was converted, 120 gm. paraffins per m.³ gas was produced. In the course of 5 mo. the gasoline yield (to 200°) decreased 21-12.9%; the diesel oil 20.5-15.1%; the solid paraffin increased 58.5-72% of the total yield. This decreased from 140 gm. hydrocarbons per m.³ synthetic gas in the 1^st mo. to 100 gm. in the 5^th.