| 摘要 |
1,252,810. Chlorine; recovering iron chloride. ASAHI GLASS CO. Ltd. 12 Feb., 1969 [12 Feb., 1968], No. 7517/69. Heading C1A. In a process where iron oxide-containing masses are chlorinated (in chamber 2) with HCl or NH 4 Cl and the resultant iron chloridecontaining masses are contacted with oxygencontaining gases at 400-650‹ C. (in chamber 3) to form Cl 2 , blockage of the gas outlet (7) is prevented by contacting the chlorine at said outlet with a stream of cooler granular particles which scrape the outlet, thus removing both deposited iron chloride and iron chloride which condenses on said particles. Specified granular particles are siliceous sand and the dechlorinated reaction masses. In an example, the chlorine gas is withdrawn from the centre of chamber 3 by means of a tube which opens rear outlet 7. The reaction mass may have a size of 100- 8000 Á and the cooler particles may be at 400‹ C. Blockage prevention in this way may be applied in 3-step processes (reduction-chlorinationoxidation) or 4-step processes (reductionchlorination-pre-oxidation-oxidation). |
