Assertion: pure acetic anhydride | /r/HasProperty | produced
Facets:
value: from the above high grade crude
type: OTHER
value: by subjecting it
type: MANNER
Source sentences:
text: We have found that pure acetic anhydride can be produced from the above high grade crude: anhydride produced by our in- .vention by subjecting it to chemical treatment for a brief period and then redistilling it, preferably under a vacuum.