A salt-free pickling regime for hides and skins using oxazolidine

Li, Kai; Chen, Hui; Wang, Yajuan; Zhi-hua, Shan; Yang, Jeff; Brutto, Patrick

doi:10.1016/j.jclepro.2009.06.004

Cited by 45 publications

(30 citation statements)

References 9 publications

(8 reference statements)

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“…Among them several tanning auxiliaries are available on the market, e.g. aliphatic dicarboxylates, glyoxylic acid (Fuchs et al, 1993), low molecular weight polyacrylates (Shifang et al, 2007), oxazolidines (Li et al, 2009) and syntans (Feairheller et al, 1988). They may be applied at the start of the tanning process or even form a part of the basification system.…”

Section: Introductionmentioning

confidence: 99%

A salt-free and chromium discharge minimizing tanning technology: the novel cleaner integrated chrome tanning process

Zhang

Jiang

Jia

et al. 2016

Journal of Cleaner Production

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Section: Introductionmentioning

confidence: 99%

A salt-free and chromium discharge minimizing tanning technology: the novel cleaner integrated chrome tanning process

Zhang

Jiang

Jia

et al. 2016

Journal of Cleaner Production

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“…Researchers have adopted various approaches to minimize the environmental impact of leather processes taking into consideration the use of chemicals having less toxicity or less environmental impact [5,27], recovery and/or reuse of water, fl oats and chemicals in leather processing steps [25,36,43] and innovation of processes and products [33,476].…”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Soaking Process Using Tannic Acid as an Alternative Bactericide

Zengin¹,

Çolak²,

Zengin³

et al. 2014

Archives of Environmental Protection

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Eco-friendly leather processes based on the usage of natural products have become a potentially attractive issue for leather industry during the last few decades. Synthetic protective chemicals like bactericides used in most soaking process are known as hazardous substances and cause tannery effl uents with high concentrations of Chemical Oxygen Demand (COD). In the present study, the effect of tannic acid on microorganisms, skin, wool and effl uent were investigated in order to demonstrate the applicability of tannic acid in soaking process instead of commonly used bactericides. The bacterial load (cfu/ml), COD and Nitrogen Content (N) of the soaking effl uents and Total Kjeldahl Nitrogen (TKN) content of skins and wools were investigated. Application of 0.5 and 1 wt% tannic acid concentrations was more effective than commercial bactericide, while comparable results were achieved by 0.1 and 0.3 wt% tannic acid. The application of tannic acid for soaking process resulted in lower COD and N values of effl uents. The results show that tannic acid has the potential to be an alternative, eco-friendly bactericide for leather industry by reducing the pollution of leather soaking process.

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“…1). The previously exposed carboxyl groups facilitate increased uptake of chromium [29]. This explains the increase in uptake of chromium when oxazolidine is offered prior to chrome tanning and along with Basic Chromium Sulfate.…”

Section: Mechanismmentioning

confidence: 99%