NON-TOXIC TITANIUM LEATHER TANNING AGENTS. PRODUCTION, PROPERTIES, APPLICATION
Lidia G. Gerasimova, Marina V. Maslova, Ekaterina S. Shchukina
Pagini: 286-296
Publicat: 1 Jan 2011
Vizualizări: 97
Rezumat: Modern leather-producing enterprises operate on toxic chromium tanning agents. The environment contamination, caused by chromium(IV) escaping with effluents, can be eliminated by substituting, either totally or partially, the chromium tanning agents for non-toxic materials. A technology of a non-toxic titanium-aluminium leather tanning agent from titanite concentrate containing an alumosilicate material – nepheline – has been developed. The kinetic studies included the sulphuric acid processing of the concentrate, converting the acid-soluble components, titanium(IV) and aluminium in particular, into a sulphuric acid solution, from which a complex salt is crystallized, by using ammonium sulphate as a salting out agent. When dissolved, the salt forms metastable titanium- aluminium complexes enhancing the titanium stability and promoting its penetration into the leather collagen. Thus, the new tannin ensures diminishing of environmental loads without impairing the leather quality.
Cuvinte cheie: titanium tanning agent, titanite, nepheline, titanium (iv) salt, eco friendly
Citează acest articol: Lidia G. Gerasimova, Marina V. Maslova, Ekaterina S. Shchukina. NON-TOXIC TITANIUM LEATHER TANNING AGENTS. PRODUCTION, PROPERTIES, APPLICATION. Journal of International Scientific Publications: Materials, Methods & Technologies 5, 286-296 (2011). https://www.scientific-publications.net/en/article/1003307/
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