AN INVESTIGATION OF PHYSICO-CHEMICAL PROPERTIES OF IMPROVED INDIGENOUS SUDANESE TANNINS MATERIALS
ALIM ABD ELGADIR HAJ ALI *
Department of National Leather Technology Center, Industrial Researcher and Consultant Center, Khartoum, Sudan
GURASHI ABD ALLAH GASM ELSEED
Department of Chemical Engineering, University of Science and Technology, Omdurman, Sudan.
ADIL EL HAJ AHMED
Department of Chemistry, Faculty of Science, Sudan University for Science and Technology, Khartoum, Sudan and Department of Chemistry, College of Arts and Science, University of Hafr Albatin Technology, Khafji, Saudi Arabia.
*Author to whom correspondence should be addressed.
Abstract
Improved indigenous tanning material was produced by blending 80% Acacia nilotica pods with 20% Azadirachta indica barks' liquors and subsequently spray-drying the liquid mixture. Various physico-chemical properties of this material were studied at National Leather Technology Centre (NLTC), Industrial Research and Consultancy Centre (IRCC), Sudan using AOAC (1996) methods. The properties of this material were compared with those of conventional indigenous and myrobalan tanning materials. The results showed that the physico-chemical properties of modified indigenous materials are comparable to the myrobalan tanning standard material and better than indigenous tanner in total soluble solids (93%), tannin contents (56%), non-tannins contents (36.7%), tannin/nontannins ratio (1.5) and the pH (4.6). The results also showed that the material has bright and light biscuit colour which is consistent to the Indian Standards and required for industrial usage.
Keywords: Acacia nilotica, Nilotica, Tomentosa, Adansonii, Azadirachta indica, Mimosoideae, Leguminous, ellagic, chebulinic and physico-chemical