The change process of physically - quu00ecmicas properties of a plant extract of Acacia, Mimosa, plant extract, modified, and the use of a chemically modified plant extract

摘要

"The change process of physically - quu00ecmicas properties of a plant extract of Acacia, Mimosa, plant extract, modified, and the use of a chemically modified plant extract.The present invention relates to a process of modification of physical and chemical properties of a plant extract of Acacia, MimosaFor tanning and retanning of leather which comprises: (a) mixing an extract in powder extracted from the black Acacia with water at a ratio of about 0.5 to 2.0 kg / 1 of water,Preferably in the ratio of 1.0 to 1.5 kg / L, and more preferably 1.05 to 1.06 kg / L; or alternatively, using a solution of tannin in liquid form at a concentration of 25% to 60%.Preferably in a concentration of 45% to 55%.And more preferably in a concentration of 50% in total solids; (b) heating the mixture formed under intense agitation to a temperature between 50 and 100 198 C,And preferably between 67 and 98 198 C; (c) adding slowly a sulfonation agent to the heated mixture in a ratio by weight of about 1 / 100 to about 1 / 20 to the Black Wattle Extract; and(d) to elevate the temperature of the mixture to a range between 45 and 135 198 C, maintaining a pressure between 0.2 kgf / cm ^ 2 ^ and 7 kgf / cm ^ 2 ^ for a period between 1 and 14 hours to complete the sulfonation of tannin.