| 摘要 |
Water is removed from chlorine gas or liquid by incorporating phosgene into the chlorine and contacting the mixture with a drying catalyst which promotes hydrolysis of the phosgene. Water contents are thus reduced to a few parts per million, e.g. less than 10 parts per million, on a volume basis. In a preferred embodiment, chlorine gas containing some carbon monoxide is passed through a phosgene generating catalyst such as activated carbon. The reaction conditions in the carbon bed are controlled to produce a sufficient amount of phosgene to react with much, if not all, of the water present in the chlorine gas on later contact with the drying catalyst.
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