METHOD OF PREPARING VANILLIN Russian patent published in 2001 - IPC

Abstract RU 2175314 C1

FIELD: chemical processing of wood components, particularly, preparation of vanillin. SUBSTANCE: vanillin is prepared by oxidation of lignin-containing stock with oxygen in alkaline medicine in the presence of ortho-phenanetroline and azolignin of formula I: wherein L is polymeric matrix of lignin sulfate on heating followed by acidification of oxidate to pH of 2. EFFECT: increased yield of vanillin. 9 ex, 1 tbl

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RU 2 175 314 C1

Authors

Kozlov I.A.

Kuznetsov B.N.

Gogotov A.F.

Dates

2001-10-27—Published

2000-09-15—Filed