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Modification of chrome tanned leather waste hydrolysate with epichlorhydrin

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dc.title Modification of chrome tanned leather waste hydrolysate with epichlorhydrin en
dc.contributor.author Langmaier, Ferdinand
dc.contributor.author Mokrejš, Pavel
dc.contributor.author Karnas, Radoslav
dc.contributor.author Mládek, Milan
dc.contributor.author Kolomazník, Karel
dc.relation.ispartof Journal of the Society of Leather Technologists and Chemists
dc.identifier.issn 0144-0322 OCLC, Ulrich, Sherpa/RoMEO, JCR
dc.date.issued 2006
utb.relation.volume 90
utb.relation.issue 1
dc.citation.spage 29
dc.citation.epage 34
dc.type article
dc.language.iso en
dc.publisher Society of Leather Technologies and Chemists (SLTC) en
dc.relation.uri http://www.sltc.org/pdf/JSLTC%200106%20PDFs/Article%205/Modification%20of%20Chrome-Tanned%20Leather%20Waste%20Hydrolysate%20with%20Epichlorhydrin.pdf
dc.subject Chromium en
dc.subject Crosslinking en
dc.subject Raw materials en
dc.subject Solubility en
dc.subject Tanning en
dc.subject Wastes en
dc.subject Chrome-tanned leather waste hydrolysate en
dc.subject Epichlorhydrin en
dc.subject Oxirane ring en
dc.subject Two-stage reaction en
dc.subject Leather en
dc.description.abstract Wider use of chrome-tanned leather waste hydrolysate as a secondary industrial raw material is impeded by the unclear economic effect of most proposed practical applications. More attention should deservedly go to hydrolysate utilised as a biodegradable packing material (packing for agricultural chemicals including herbicides, insecticides, pesticides, fertilizers etc.) The appropriate cross-link density enables us to control the water solubility of hydrolysate, its biodegradation and the rate at which active substances are released from such packing. The properties may significantly influence the economic effect of such an application. Increasing the cross-link density of hydrolysate by reacting it with dialdehydes easily leads to the formation of thermo-irreversible gels which are difficult to process. The main attention, therefore, is aimed at cross-linking hydrolysate with epichlorhydrin. In an aqueous environment, epichlorhydrin reacts with the primary amino groups of hydrolysate as a monofunctional agent through its chlorine atom. At temperatures around 60 degrees C an equilibrium is attained in about 60 min. characterised by approx. 80% of the primary amino groups present having reacted. Reaction of the oxirane ring of epichlorhydrin proceeds at considerably higher temperatures (similar to 200 degrees C). Cross-linking of hydrolysate with epichlorhydrin is thus a two-stage reaction, which may be regarded as an advantage for some applications. en
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1002071
utb.identifier.obdid 43865430
utb.identifier.scopus 2-s2.0-33644601890
utb.identifier.wok 000235849500007
utb.identifier.coden JSLTB
utb.source j-wok
dc.date.accessioned 2011-08-16T15:06:21Z
dc.date.available 2011-08-16T15:06:21Z
utb.contributor.internalauthor Langmaier, Ferdinand
utb.contributor.internalauthor Mokrejš, Pavel
utb.contributor.internalauthor Karnas, Radoslav
utb.contributor.internalauthor Mládek, Milan
utb.contributor.internalauthor Kolomazník, Karel
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