Assertion: crude vanillin | /r/HasProperty | contaminated with impurity
Facets:
Source sentences:
text: Accordingly, the present invention provides a process for the purification of crude vanillin contaminated with impurities comprising contacting the crude vanillin with a supercritical extraction fluid at supercritical extraction conditions, extracting from the crude vanillin at least some of the impurities, and separating the supercritical fluid containing impurities from the crude vanillin to produce vanillin product with increased purity.