Environmentally friendly chrome-tanning method

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 11274353
APP PUB NO 20180094330A1
SERIAL NO

15564554

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Abstract

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A method for tanning a hide wherein said method comprises treating a tannable hide with a tanning composition comprising from 25 to 75% by weight (wt. %) of at least one chromium(III) salt; from 5 to 70% by weight (wt. %) of at least one zeolite having the general formula (1): Mx/n [(AlO2)x(SiO2)y] wH2O, wherein M is an alkali metal cation, a bivalent cation, a trivalent cation or a mixture thereof, n is the valence of the cation, w is the number of water molecules per unit cell, y is a number from 0.8 to 50 and the ratio y to x is ranging from 0.7 to 100, treated with at least one acid selected from the group consisting of a monocarboxylic acid and a polycarboxyic acid; and from 1 to 70 wt. % of at least one aluminium(III) salt; wherein all wt. % are relative to the total weight of the composition (T).

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Patent Owner(s)

Patent OwnerAddress
SMIT TANNING HOLDING B VNIJVERHEIDSLAAN 48 WEESP 1382 LK

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Armengol, Jordi Barcelona, ES 1 0
van, der Burgh Stefan Tiel, NL 4 68

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