METHOD OF CHROME TANNING AGENT PREPARING Russian patent published in 1994 - IPC

Abstract RU 2017824 C1

FIELD: chemical technology. SUBSTANCE: chrome (6+) compounds are reduced at the first stage with sulfur acid waste of the following composition, wt. -%: sulfur acid 26-48; organic impurities 0.4-1.0, and water - the rest; at the second stage with sulfite waste of the following composition, wt.-%: sodium bisulfite 10-20; sodium sulfite 5-15, and water - the rest. EFFECT: improved method of tanning agent making. 1 tbl

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RU 2 017 824 C1

Authors

Tsimbalenko A.A.

Danilkovich A.G.

Zhuravskij V.A.

Dates

1994-08-15—Published

1991-03-04—Filed