Assertion: naphtha | /r/HasProperty | treated
Facets:
value: usually
type: DEGREE
Source sentences:
text: Before the naphtha is redistilled into a number of fractions with boiling ranges suitable for aliphatic solvents, the naphtha is usually treated to remove sulfur compounds, as well as aromatic hydrocarbons, which are present in sufficient quantity to cause an odor.
text: Naphtha that is either naturally sweet (no odor), or has been treated until sweet, is subdivided into several fractions in efficient fractional distillation towers frequently called pipe stills, columns, and column steam stills.