Cel The possibility of using colloidal silicas of small size in the leathermaking process has been demonstrated. A new ecological white stabilized intermediate (WSI) for tanneries has been developed, obtained through new types of colloidal silicas with very small diameter (between 6 and 10 nm). Four molecules have given good results. The main achievement at the end of the project was production at the industrial level of 4 stable colloidal silicas adapted to the WSI specifications. The WSIs obtained with these molecules through the different processes developed in this research have allowed: the selection of the mechanical operations before tanning, allowing the choice in quality and thickness and the best adapted tanning process; one year preservation for the WSI; development of 3 new direct tanning processes: direct velvet, direct white and direct chromium, based on WSI; great quality improvements in the final leather produced; drastic reduction of the chrome pollution to comply with new European regulations; reduction of around 25% of the chemicals used; reduction of the labour cost of around 30%; the recycling of the wastes (nontoxic, since the colloidal silicas are food authorized) for the production of collagen hydrolysates for the food, pharmaceutical and cosmetics industries; a general saving for the tannery fixed at a conservative 30% compared with the classic wet blue process. Dziedzina nauki engineering and technologyenvironmental engineeringwaste managementwaste treatment processesrecyclingnatural scienceschemical sciencesinorganic chemistrytransition metalsnatural sciencesearth and related environmental sciencesenvironmental sciencespollution Program(-y) FP2-BRITE/EURAM 1 - Specific research and technological development programme (EEC) in the fields of industrial manufacturing technologies and advanced materials applications (BRITE/EURAM), 1989-1992 Temat(-y) Data not available Zaproszenie do składania wniosków Data not available System finansowania Data not available Koordynator Société Française Hoechst Wkład UE Brak danych Adres Tour Roussel Hoechst 92080 Paris la Défense Francja Zobacz na mapie Koszt całkowity Brak danych Uczestnicy (2) Sortuj alfabetycznie Sortuj według wkładu UE Rozwiń wszystko Zwiń wszystko Deutsche Gelatine-Fabriken Stoss AG Niemcy Wkład UE Brak danych Adres Gammelsbacher Straße 2 6930 EBERBACH Zobacz na mapie Koszt całkowity Brak danych Società per Azioni Lavorazione Pelli Włochy Wkład UE Brak danych Adres Corso Torino 155 10086 Rivarolo Canavese Torino Zobacz na mapie Koszt całkowity Brak danych
