Chemistry of inorganic compounds – Halogen or compound thereof – Elemental halogen
Patent
1978-04-24
1979-11-13
Thomas, Earl C.
Chemistry of inorganic compounds
Halogen or compound thereof
Elemental halogen
423633, C01B 703
Patent
active
041743814
ABSTRACT:
An improved industrial process and apparatus are provided for producing chlorine and iron oxide in a multi-stage recirculating-fluidized-bed reactor wherein ferric chloride in the vapor phase is reacted with an excess of oxygen at temperatures from 550.degree. to 800.degree. C. The improvement comprises utilizing a reactor that includes an initial "dense" zone and a downstream "dilute" zone. In the dense zone, a fuel is burned, reactants and recirculated iron oxide particles are heated, ferric chloride is vaporized and at least 50% of the ferric chloride is converted to chlorine and iron oxide. A solids volume fraction from 0.3 to 0.6 and a superficial gas velocity from 0.15 to 0.6 meters/second are maintained in the dense zone. In the downstream dilute zone, a solids fraction from 0.005 to 0.05 is maintained, along with a superficial gas velocity from 1.5 to 6 meters/second which is from 5 to 25 times the superficial gas velocity in the dense zone, and the conversion of ferric chloride is continued to greater than 95% completion.
REFERENCES:
patent: 2642339 (1953-06-01), Sawyer
patent: 3793444 (1974-02-01), Reeves et al.
Alfred Weiss, Ed., "World Mining & Metals Technology", The Society of Mining Engineers, Aug. 1976, pp. 693-712.
Reeves James W.
Sylvester Robert W.
Wells David F.
E. I. Du Pont de Nemours & Co.
Thomas Earl C.
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