[article]
| Titre : |
Rapid oxidative dehairing with magnesium peroxide and potassium peroxymonosulfate |
| Type de document : |
texte imprimé |
| Auteurs : |
Andrew G. Gehring, Auteur ; William N. Marmer, Auteur ; Chad E. Mazenko, Auteur ; Robert L. Dudley, Auteur |
| Année de publication : |
2006 |
| Article en page(s) : |
p. 324-329 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Sodium sulfide is traditionally used to remove hair from animal hides during tanning operations. However, alternatives to sodium sulfide are desired because sodium sulfide is an environmental pollutant that is quickly converted to highly toxic hydrogen sulfide gas if accidentally exposed to acid. In past research, we demonstrated that either alkaline calcium peroxide or alkaline hydrogen peroxide may be used as an effective substitute for concentrated sodium sulfide for rapid dehairing. More recently, we demonstrated the effectiveness of alkaline hydrogen peroxide with potassium cyanate. Here we similarly present alternative oxidative dehairing reagents/conditions, using magnesium peroxide and potassium peroxymonosulfate, which may also find application in either the packing plant or beamhouse. As observed with previously reported rapid dehairing, dehairing often is not thorough, leaving very short stubble. However, residual hair was readily removed with a sodium sulfide sharpening/hairburn, indicating that hair stubble was not immunized by the oxidative treatment. Dehairing reaction conditions that rapidly removed 80% or greater of hair from cattle hide pieces were observed for magnesium peroxide (5%, 15% NaOH, 200% float, 45°C, 8 min, hairburn process) and potassium peroxymonosulfate (5%, 15% NaOH, 200% float, 45°C, 7 min, hairburn process). Leather produced from matched side pieces that were subjected to these oxidative dehairing treatments was determined to take up less chromium yet was tougher than leather produced using conventional hairburn with sodium sulfide. Other physical testing results are also reported. |
| En ligne : |
https://drive.google.com/file/d/187W3ZURmZXXDSwg5-Ulz-bJ-XteOfmY2/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3991 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CI, N° 9 (09/2006) . - p. 324-329
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Rapid oxidative dehairing with magnesium peroxide and potassium peroxymonosulfate in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 9 (09/2006)
