Assertion: phosgene | /r/HasProperty | removed with caustic alkali solutions
Facets:
value: preferably
type: MANNER
value: from the waste gases
type: TRANSITIVE-OBJECT
value: by washing with water
type: MANNER
Source sentences:
text: For example, the phosgene can be removed from the waste gases by washing with water or, preferably, with caustic alkali solutions.