| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a large quantity of pure chlorine gas from hydrogen chloride and oxygen using less energy. SOLUTION: Hydrogen chloride and oxygen are reacted in a reactor (10) at a pressure of≥0.6 MPa to obtain a high-pressure crude chlorine gas containing unreacted oxygen. The high-pressure crude chlorine gas is cooled by a cooling means (20) without elevating the pressure to liquefy chlorine in the gas, giving high-pressure liquefied crude chlorine. The unreacted oxygen is separated from the high-pressure liquefied chlorine by a chlorine purifying means (30), giving high-pressure liquefied pure chlorine. The unreacted oxygen is recovered by a recovering means (40) and used for the reaction with hydrogen chloride in the reactor (10). The high-pressure liquefied pure chlorine is decompressed in a decompressing means (50) to obtain liquefied pure chlorine, which is then vaporized to give a pure chlorine gas. The cooling means (20) is a heat exchanger, where a latent heat generated by liquefying chlorine is used for vaporizing the liquefied pure chlorine. The chlorine concentration of the high-pressure crude chlorine gas is≥45% as mole fraction and the high- pressure liquefied pure chlorine is decompressed to≤0.3 MPa. COPYRIGHT: (C)2004,JPO
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