Alkali-free method of hide preparation for tanning
| Autor: | Kęstutis Beleška, Virgilijus Valeika, Justa Sirvaityte |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
dermatan sulphate
General Chemical Engineering Sodium Unhairing chemistry.chemical_element hide chemistry.chemical_compound Acetic acid peracetic acid Peracetic acid Oxidative treatment Pickling Organic chemistry unhairing leather lcsh:Chemical engineering Hide Alkali free Dermatan sulphate lcsh:TP155-156 enzyme Leather chemistry Enzyme Sodium acetate Nuclear chemistry |
| Zdroj: | Brazilian Journal of Chemical Engineering, Volume: 29, Issue: 2, Pages: 315-323, Published: JUN 2012 Brazilian Journal of Chemical Engineering, Vol 29, Iss 2, Pp 315-323 (2012) Brazilian Journal of Chemical Engineering v.29 n.2 2012 Brazilian Journal of Chemical Engineering Associação Brasileira de Engenharia Química (ABEQ) instacron:ABEQ |
| Popis: | Usually, beamhouse processes are carried out by varying a medium from strongly alkaline (unhairing-liming) up to strongly acid (pickling). This study is designed to develop a preparation of hide for tanning via processes that avoid a sharp change of hide pH. Enzymes active in acid medium are employed for hide unhairing in a buffer system containing 2.5% acetic acid and 0.3% sodium acetate. An oxidative treatment with peracetic acid then allows the complete removal of residual hair and scud. During both processes, unhairing and oxidative treatment, the opening of the derma structure occurs: 13.3-14.6g of non-collagen proteins are removed and amount of dermatan sulphate decreases by 35%. The hide obtained can be chromed directly after the above processes and subsequent treatment with sodium chloride solution omitted conventional pickling. The pH of the hide varies in the range of 8.3-3.7 during the processes of preparation for tanning. |
| Databáze: | OpenAIRE |
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