Assertion: pyridine | /r/HasProperty | homologs in the still
Facets:
Source sentences:
text: A pyridine homolog product substantially free of pyrrole may be recovered from this residual material either by continuing azeotropic distillation thereof in the presence of water until the material left in the still is substantially free from pyrrole or by subjecting the residual material low in pyrrole to straight fractional distillation in the absence of water to take off a substantially pure pyridine homolog product as distillate, leaving the pyrrole and a part of the pyridine homologs in the still in the form of the above-mentioned high-boiling pyrrole-pyridine homolog azeotropic mixture.