Process for removing the hair from green hides

222,121. Bergmann, M., Immend÷rfer, E., and Immend÷rfer (nÚe Goodson), A. Sept. 16, 1924. Treatment preliminary to tanning.-Hair or wool is removed from hides and skins by immersing the hides &c. in a solution containing sulphides of inorganic or organic nitrogen bases and free from active alkal...

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Bibliographische Detailangaben
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING,IMPREGNATING, FINISHING CHEMISTRY COMPOSITIONS FOR TANNING HIDES LEATHER METALLURGY PELTS SKINS
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Zusammenfassung:	222,121. Bergmann, M., Immend÷rfer, E., and Immend÷rfer (nÚe Goodson), A. Sept. 16, 1924. Treatment preliminary to tanning.-Hair or wool is removed from hides and skins by immersing the hides &c. in a solution containing sulphides of inorganic or organic nitrogen bases and free from active alkali sulphides. Suitable sulphide solutions may also be obtained by treating alkali sulphides with equimolecular or excess quantities of salts of inorganic or organic nitrogen bases. In an example, a depilating liquid is prepared by mixing commercial ammonium sulphide, 20 litres, with aqueous ammonia solution, 200 litres, in 20 hectolitres of water. Pyridine or carbamide may be substituted for free ammonia.