Low-chromium- and low-sulphate emission leather tanning intensified by compressed carbon dioxide
| Autor: | Eckhard Weidner, T. Heinen, Manfred Renner, Michael Prokein |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Economics and Econometrics
Environmental Engineering chemistry.chemical_element 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences chemistry.chemical_compound Chromium otorhinolaryngologic diseases Environmental Chemistry skin and connective tissue diseases 0505 law 0105 earth and related environmental sciences Leather industry integumentary system Waste management 05 social sciences technology industry and agriculture General Business Management and Accounting Leather tanning chemistry Wastewater Carbon dioxide 050501 criminology human activities Carbon |
| Zdroj: | Clean Technologies and Environmental Policy. 19:2455-2465 |
| ISSN: | 1618-9558 1618-954X |
| Popis: | The leather industry transforms raw hides and skins into high-performance leather products. This transformation requires a high usage of chemicals. About 90% of all leather products are tanned by basic chromium sulphate tanning agents. The use of large quantities of tanning agent causes elevated chromium and sulphate concentrations in the wastewater of conventional tanneries. This article focuses on the reduction of tanning agent consumed by the chromium tanning procedure. Compressed carbon dioxide is used to intensify the process. Carbon dioxide-intensified tanning at 60 bar allows the production of high-quality leather by using about 50 wt% less of tanning agent compared to the conventional tanning process. The chromium and sulphate concentrations in the wastewater generated by the tanning process are highly reduced. Results of full skin tanning (bull skin; up to 10 square metre per skin) in a high-pressure reactor with a volume of 1700-L are presented for the first time. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink