Assertion: weak nitric acid | /r/HasProperty | recycled for concentration
Facets:
Source sentences:
text: They are passed to a fractionating tower equipped with reiiux and are separated in the tower into water which is drawn oil' at the top and discarded, and weak nitric acid which is drawn oil at the bottom for admixture with more weak nitric acid and the regenerated solution of dehydrating agent and recycled for concentration.