C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/33
C10G 1/02 (2006.01) C04B 7/30 (2006.01) C10B 49/16 (2006.01) C10L 9/02 (2006.01) F26B 3/08 (2006.01) F26B 3/10 (2006.01)
Patent
CA 1054962
ABSTRACT OF THE DISCLOSURE: A dry distillation process comprises treating bituminous or oil-containing fine-grained material in a distillation zone with a heat carrier comprising fine-grained dry distillation residue which is heated in a pneumatic conveyor line by hot combustion gases and then fed to a collecting vessel to remain in the collecting vessel for a residence time of 1-40 minutes at a temperature in the range of 750°-850°C, continuously withdrawing distillation residue from the collecting vessel and mixing same in the dry distillation zone with the bituminous or oil-containing fine-grained material, the material containing at least 0.2 percent by weight of magnesium carbonate or calcium carbonate or a mixture of these carbonates, withdrawing distillation products from the distillation zone and feeding the withdrawn dry distillation residue to the inlet of the pneumatic conveyor line to be reheated therein and withdrawing exhaust gases from the collecting vessel. The process of the invention permits to greatly decrease the content of sulfur dioxide in the exhaust gases, in a simple and economical manner.
246521
Rammler Roland
Weiss Hans-Jurgen
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