. Journal. ause the heavier, unhydrated particles to settleto the bottom of the mass, and the lighter, hydratedparticles, to rise to the surface and pass off while theheavier particles are held in check. The separatedhydrated particles are passed over a screen, and thecoarser particles thus separated are retained in an atmo-sphere of steam until completely hvdrated. (See Pats. 773,029 and 773,030, of 1904; this J., 1904,1088 and 1089.)—E. S. Ammonia ; Process of Making by Synthesis. H. C. Woltereck, Assignor to the Eschweiler-WoltereckProcess Synd., Ltd., London. Pat. 803,651,Nov
. Journal. ause the heavier, unhydrated particles to settleto the bottom of the mass, and the lighter, hydratedparticles, to rise to the surface and pass off while theheavier particles are held in check. The separatedhydrated particles are passed over a screen, and thecoarser particles thus separated are retained in an atmo-sphere of steam until completely hvdrated. (See Pats. 773,029 and 773,030, of 1904; this J., 1904,1088 and 1089.)—E. S. Ammonia ; Process of Making by Synthesis. H. C. Woltereck, Assignor to the Eschweiler-WoltereckProcess Synd., Ltd., London. Pat. 803,651,Nov. 7, 1905. See Eng. Pat. 2461 of 1902 ; this J., 1903, 695.— Ammonia ; Process of Making by Synthesis. H. C. Woltereck, Assignor to the Chemicals Poprietary Co.,Ltd., London. Pats. 803,652 and 803,653, Nov. 7,1905. See Fr. Pat. 332,591 of 1903 ; this J . 1903, 1243.— French Patents. Kiln for Roasting Fine and Granulated Pyrites ; Rotating . V. Brulfer. Fr. Pat. 355,581, June 24, The kiln or furnace consists of a large cylinder 1 linedwith brickwork and refractory material, and rotated bymeans of a toothed flange on its exterior, gearine with apinion mounted between rollers (not shown) resting onthe blocks 3. The furnace is divided longitudinally into anumber of compartments 8, communicating with eachother by the passages 9. The two dust-chambers 10 atthe ends of the furnace are provided with doorslO throughwhich they can be cleaned. The pyrites is introduced intochambers 8 through ports 11 from hoppers 12. and thefurnace is then set in rotation and heated to bright redness,the pyrites being kept in continual agitation and subjectedto a rubbing action by the projections 16 and 17 JOURNAL AND w I RE Ci VD 1231
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
