Tanning agent-free leather making method

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United States of America Patent

PATENT NO 11739390
APP PUB NO 20220411887A1
SERIAL NO

17899644

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Abstract

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A tanning agent-free leather making method is provided. A raw hide is subjected to controllable dehydration with a molecular sieve-polar organic solvent composite dehydration media to achieve a dehydrated hide, and then a tanning agent-free leather is prepared by increasing the surface roughness of the dehydrated hide and reducing the surface energy of the dehydrated hide. The present disclosure does not use any metal or non-metal tanning agent, which is eco-friendly. The present disclosure breaks the balance of water distribution between the raw hide and the polar organic solvent, which realizes a multi-medium self-driven directional controllable dehydration of the raw hide, effectively solving the problems during dehydration of the raw hide only using polar organic solvent. The molecular sieve-polar organic solvent dehydration system is easy to recover and can be recycled for the controllable dehydration of the raw hide multiple times. Therefore, a brand-new clean leather making technology is provided.

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Patent Owner(s)

Patent OwnerAddress
SICHUAN UNIVERSITYNO 1 SOUTH RING ROAD CHENGDU 6100424 SICHUAN PROVINCE CHENGDU CITY SICHUAN PROVINCE 610044

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Huang, Xin Chengdu, CN 222 787
Huang, Yawen Taixing, CN 15 27
Shi, Bi Chengdu, CN 9 9

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