| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for purifying nitric oxide suitable for suppressing the formation of a by-product and improving the purity of nitric oxide gas and the recovery rate. SOLUTION: The method for purifying nitric oxide contains a process in which a raw gas containing nitric oxide, nitrogen dioxide, and water is contacted to sulfur dioxide in a gas-liquid contact vessel 1a and nitrogen dioxide is reduced to nitric oxide. COPYRIGHT: (C)2007,JPO&INPIT
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