Assertion: phosgene | /r/HasProperty | removed
Facets:
value: from gases
type: OTHER
value: by using activated alumina
type: MANNER
Source sentences:
text: that phosgene can be removed from gases by using activated alumina.
text: It now has been found that phosgene can be removed from off gases more efficiently than the known prior art by contacting or scrubbing the off gases with an aqueous solution comprising 1 to 25 weight percent of an alkali metal hydroxide and an amount effective to remove phosgene of a tertiary amine compound having 3-20 carbon atoms.
text: Using the process according to the invention, phosgene at extremely low concentrations can be removed from waste gases, for example down to concentrations which correspond to the water vapor saturation content of the gas at the particular temperature.
text: In order to limit the accumulation of these contaminants in the recycle gas stream, a portion of the recyclable gases (i.e., the product gases after the phosgene has been removed) should be purged prior to recycling.