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A salt-free pickling chrome tanning approach using a novel sulphonic aromatic acid structure
- Source :
- Journal of Cleaner Production. 142:1741-1748
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- Large discharge of chromium and chloride is a severe pollution source in conventional leather-making industry, which hinders the sustainable development of leather industry and affects human life greatly. Aiming at minimizing the emissions of chromium and chloride, novel materials rich in sulfonic acid group were synthesized and optimized in salt-free pickling and less chrome tanning process. The results showed that, the novel method would improve the chromium absorption and distribution in crust leather from 7 1 .6% to 98.6%, in comparison with conventional pickling chrome tanning, and the concentration of residual chromium in spent liquor was decreased to 45 mg/L. The SEM indicated that the resulting leather treated with novel salt-free pickling showed clean pores and well-dispersed fibrils. Further experiment proved this novel salt-free pickling and less chrome tanning method is feasible in terms of organoleptic and physical mechanical properties. The financial assessment showed that the novel method is 46.9% cheaper than conventional approach. This novel pickling chrome tanning method can successfully solve the emission of chromium and chloride as well as obtain cleaner products in leather-making industry.
- Subjects :
- Materials science
Chrome plating
Strategy and Management
Organoleptic
chemistry.chemical_element
010501 environmental sciences
Sulfonic acid
01 natural sciences
Chloride
Industrial and Manufacturing Engineering
Chromium
Pickling
medicine
0505 law
0105 earth and related environmental sciences
General Environmental Science
chemistry.chemical_classification
Aromatic acid
Renewable Energy, Sustainability and the Environment
Salt free
05 social sciences
Metallurgy
chemistry
visual_art
050501 criminology
visual_art.visual_art_medium
medicine.drug
Subjects
Details
- ISSN :
- 09596526
- Volume :
- 142
- Database :
- OpenAIRE
- Journal :
- Journal of Cleaner Production
- Accession number :
- edsair.doi...........dadadf2f37c579a4ae2f572b0c882e08