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 1314.    HALL, C. C.  Chemische Werke Essener Steinkohle A.-G. Bergkamen Near Kamen-Dortmund, Germany.  Inspection of Fischer-Tropsch Plant, CIOS Rept. XXVII-54, 1945, 5 pp. PB 413; TOM Rept. 10; TAC Rept.SnMC-4; TOM Reel 197.

        This plant contained 124 standard-type atmospheric-pressure ovens, divided into 2 stages; the exact distribution between them depended on catalyst life, plant operation, etc.  Each oven contained 1 ton of Co catalyst, the life of which was about 8.5 mo.  The synthesis gas was prepared from coke and coke-oven gas in 12 Demag water-gas sets and contained CO, 29% and H₂, 59%.  A freshly charged oven was treated 1^st at 185°-190° for 24-48 hr. with residual gas from stage 2 and then put on stream in stage 2 at 180° where it remained for 2-3 mo.  It was then transferred to stage 1 when the operating temperature had risen to about 190°.  The gas contraction in stage 1 was 45-50% and the over-all contraction 72-75%.  The average annual yield of products was 156-157 gm. per m.³ of gas.  After 2-3 mo. in stage 2 and 3 weeks in stage 1, reactivation of the catalyst took place by means of H₂ treatment at 195° for 24 hr. alternated with solvent extraction with benzine at 120°-150°.  The products of the process were:  14.7% gasol, 47.9 gasoline, 17.3 diesel oil, 10.7 heavy oil, 7.7 gatsch, and 1.7 hard wax from catalyst.  The annual output was 80,000 ton.  The composition of residual gas from the process (500,000 m.³ per day) was:  CO₂, 20.3%; C_nH_m, 1.6; O₂, 0.1; CO, 10.5; H₂, 18.0; CH₄, 30.9; N₂, 18.5%.