专利名称：Purification of vanillin发明人：Earle C. Makin申请号：US06/417314申请日：19820913公开号：US04474994A公开日：19841002
摘要：Crude vanillin is purified by supercritical extraction of impurities. The process isespecially useful in purifying crude vanillin obtained from paper mill waste liquors.Preferred supercritical extraction fluid is CO.sub.2.
申请人：MONSANTO COMPANY
代理人：Jon H. Beusen,James C. Logomasini,Arnold H. Cole
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