METHOD OF PREPARING INSOLUBLE TANNIN Russian patent published in 1997 - IPC

Abstract RU 2072896 C1

FIELD: sorbent production. SUBSTANCE: tannin of Australian acacia is dissolved in aqueous formaldehyde solution, ammonia is added, and resultant precipitate is kept to be aged. EFFECT: improved procedure. 4 cl, 2 dwg

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RU 2 072 896 C1

Authors

Vataru Sirato[Jp]

Esinobu Kamei[Jp]

Dates

1997-02-10—Published

1993-10-11—Filed