Assertion: crude vanillin | /r/HasProperty | a vanillin concentrate
Facets:
Source sentences:
text: The present invention for the first time provides a method of recovering over 99% of component vanillin from a crude vanillin which is a vanillin concentrate contaminated with dissolved colored, flavored, and other impurities, simultaneously rejecting nearly all impurities and obtaining directly from the distillation a concentrate of a degree of purity adapted for the usual final crystallizations.