The alternative methods of preparing wool for printing

Abstract

The adsorbable organohalogens (AOX) loading of effluent must be set against the high efficiency of chlorination in preparing wool for printing Therefore, there have been a number of research attempts to develop alternative chlorine free treatment methods which could give the equivalent finishing results in preparing wool for printing to those obtained with the traditional chlorination. This review reports on a chemical oxidative method which presents a true alternative to chlorination. It is based on the use of hydrogen peroxide in conjunction with a tungsten salt as recyclable catalyst. Moreover, the beneficial effects of some 'dry' treatments for preparing wool on printability properties have also been reviewed.

Sve strožiji ekološki propisi vezani za prisustvo organskih adsorbujućih jedinjenja hlora (AOX) u otpadnim vodama nameću potrebu za zamenom hlorovanja u pripremi vune za štampanje, uprkos velikoj efikasnosti ovog postupka. To je uslovilo razvoj novih postupaka koji mogu dati približno iste rezultate kao hlorovanje s aspekta ponašanja vune pri štampanju. Hemijski oksidacioni postupak prikazan u radu, koji se zasniva na obradi vune rastvorom vodonik-peroksida u prisustvu volframata kao katalizatora koji se može reciklovati, predstavlja stvarnu alternativu hlorovanju. Takođe, razmotreni su primeri "suvih" postupaka čijom primenom se postiže zadovoljavajuća priprema vune za štampanje.