Assertion: vanillin | /r/HasProperty | removed in mixed distillate of vanillin
Facets:
Source sentences:
text: The method of recovering vanillin in high yield and purit from a crude concentrate, containing vanillin contaminated with colored, flavored, and other impurities, which comprises the steps of simultaneously vacuum-distilling the crude vanillin concentrate and a liquid substantially aliphatic saturated hydrocarbon distilling aid which is a non-solvent for vanillin at room temperature, said hydrocarbon having an atmospheric boiling range between about 220 C. and 320 C. and distilling under reduced pressure at a temperature not exceeding about C., continuing said distillation until substantially all the vanillin is removed in a mixed distillate of vanillin and said hydrocarbon distilling aid, then cooling the distillate of vanillin and distilling aid until the distilling aid and the vanillin separate as two superimposed liquid phases, then removing the distilling aid from the molten vanillin and purifying the vanillin to U. S. P. grade.