Journal . Enw. Pat 5757April 20, 1887. llrf. The invention relates to the manufacture of caustic ashfrom bicarbonate or carbonate of soda, or a mixture ofbicarbonate and carbonate by the addition of a strongsodium hydrate solution. The moist bicarbonate producedby the ammonia-soda process is dried in a horizontalcylinder provided with stirring blades which convey thematerial from one end of the apparatus to the other, andthe sodium hydrate solution is injected in a state of finedivision into the cylinder at a point where the bicarbonatehas been converted into carbonate. The furnace used isshow
Journal . Enw. Pat 5757April 20, 1887. llrf. The invention relates to the manufacture of caustic ashfrom bicarbonate or carbonate of soda, or a mixture ofbicarbonate and carbonate by the addition of a strongsodium hydrate solution. The moist bicarbonate producedby the ammonia-soda process is dried in a horizontalcylinder provided with stirring blades which convey thematerial from one end of the apparatus to the other, andthe sodium hydrate solution is injected in a state of finedivision into the cylinder at a point where the bicarbonatehas been converted into carbonate. The furnace used isshown in the Figure. A is a horizontal cylinder, made insegments. The lower half « is of cast iron and the upperhalf a of wrouglit iron. The lower half is placed above agrate or furnace and heated in any convenient is the hopper through which the material to be treated isintroduced into the cylinder. The ends D, which are madein halves, are prodded with bearings d d for supporting the r/.. .. ^ T^,. main shaft E. A suspended bearing b is provided midwayto support the shaft at that point. G designates the bladesand scrapers, which are secured to bars H and are carriedby arms I mounted on the shaft E ; .T and J are worm-wheels and give motion to the main shaft. C is a shootthrough which the finished material leaves the cylinder is about 30 feet long ; the main shaft makesthree or four revolutions per minute, and the blades willpropel the material through the apparatus in from40 minutes to one hour.—S. H. Process and for the Manufacture of DryCalcium Hydroxide. J. Pfeiffer, Kaiserslautern, Ger-many. Eng. Pat. 43, .January 2, 1888. 6d. The invention relates to the conversion of calcium oxideinto calcium hytli~ate by treating the former with waterwhile enclosed in a heated receptacle. For this purposesenii-cylindriail carriages B (Figs. 1 and 2), charged withbroken lime, are iiitroiluced into the metallic cylinder latter is provided with a safe
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
