Rare Earth and Tetra Hydroxymethyl Phosphonium Sulfate Combination Tanning

Abstract:

A new chrome free tanning system of rare earth (RE)-THPS has been developed in this study. It has been proved by UV spectrum that THPS and RE (CeCl₃) can coordinate under certain conditions. The influence of CeCl₃ and THPS’s ratio, pH and ligands on the shrinkage temperature (T_s) was studied. Higher Ts was obtained while the tannage was processed in the sequence of THPS followed by CeCl₃. The alkaline pH should be controlled between 5.5 and 6.0 to give ideal tanning effect. It was also found that employing of 0.5% tartaric acid in this combination tanning system can give high Ts of 89°C.

• Periodical: Advanced Materials Research (Volumes 479-481)
• Pages: 430-433
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.479-481.430
• Online since: February 2012
• Authors: Ya Li, Shuang Xi Shao, Lan Jiang, Kai Qi Shi
• Keywords: CeCl₃, Chrome Free Combination Tanning, THPS

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