875.    [FARAGHER, W. F. AND HORNE, W. A., HOWES, D. A., SCHINDLER, H., CHAFFEE, C. C., WEST, H. L., AND ROSENFELD, L.]  Supplemental Report on Ruhrchemie A. G., Sterkrade-Holten, Ruhr.  Laboratory Test for Activity of Fischer Catalyst.  CIOS Rept. XXXII-96, 1945, pp. 14-16; TOM Reel 196; PB 1366.

     About 4 gm. of catalyst in a glass tube are reduced for 2 hr. at 450° with a mixture of H₂ and N₂ (3:1) at the rate of 300 l. per hr. or with pure H₂ at 400°.  The final catalyst contains 40-50% of the Co as oxide.  After reduction, the tube is placed in an Al-block furnace and treated with synthesis gas (4 l. CO:H₂=1.0:1.8-1.9) for 500 hr.  Contraction of the gas volume and yield of liquid products are measured and serve as measures of activity.  The liquid products are expressed as cc. per N m.³ of synthesis gas and comprise oil that condenses at room temperature in the receiver and the liquid removed from the activated C adsorber by steaming at 150° and 15-20 mm. Hg.  Water formation can also be used in appraising the catalyst activity.  A diagram of the apparatus is shown, and typical test data for a normal Co catalyst and its contraction curve are attached.