The N-Benzoyl-0-methyl - N1-(o-nitrophenyl)·isourea (L1) and N-Benzoyl-0-methyl·N1-(p-bromphenyl)-isourea (L2) ligands were slntheslzed by reactlon of the correspondlng N-Benzoyl-N1-phenyl-thioureas wlth mercury(II) acetate in methanolic solution. The characterlzation was made by elemental analysis, hydrogen (1H) and carbon (13C) Nuclear Magnetic Resonance, mass spectroscopy and the measure of their physical properties. The crlitallyne molecular structure of (L1) was determined by X-ray dlfraction.

The 1,1 biphenyl-3 - benzoylthiourea(BFBTU) and 1, 1- biethyl - 3- benzoylthiourea (DEBTU), solubilized in chloroform were evaluated as extractanT of metallic ions Cu(II) and Ag(I) aproximatelly 0,01 M, because they form stable chelats with high extraction capacity, particularly when the pH is increased. The higher extraction of Ag(I) compared with Cu(II) for both ligands is because the markedly preference of the S donor atom for Ag(I) ion.

The goal of this research work is the design of a cleaner process for the production of fuel ethanol sweet potato. Applying the principles of conceptual design, Pinch analysis and the use of simulators chem cad and pinch cad, it is determined that the process with molecular sieves is the most effective to get ethanol from 99.5% purity with a power demand of 1400 Kj/kg of ethanol. We conclude that these results impacting positively on the economy of Peru by establishing a path of sustainable development both technically, economically, socially and environmentally.

The N-Benzoyl-0-methyl - N1-(o-nitrophenyl)·isourea (L1) and N-Benzoyl-0-methyl·N1-(p-bromphenyl)-isourea (L2) ligands were slntheslzed by reactlon of the correspondlng N-Benzoyl-N1-phenyl-thioureas wlth mercury(II) acetate in methanolic solution. The characterlzation was made by elemental analysis, hydrogen (1H) and carbon (13C) Nuclear Magnetic Resonance, mass spectroscopy and the measure of their physical properties. The crlitallyne molecular structure of (L1) was determined by X-ray dlfraction.

The 1,1 biphenyl-3 - benzoylthiourea(BFBTU) and 1, 1- biethyl - 3- benzoylthiourea (DEBTU), solubilized in chloroform were evaluated as extractanT of metallic ions Cu(II) and Ag(I) aproximatelly 0,01 M, because they form stable chelats with high extraction capacity, particularly when the pH is increased. The higher extraction of Ag(I) compared with Cu(II) for both ligands is because the markedly preference of the S donor atom for Ag(I) ion.

The goal of this research work is the design of a cleaner process for the production of fuel ethanol sweet potato. Applying the principles of conceptual design, Pinch analysis and the use of simulators chem cad and pinch cad, it is determined that the process with molecular sieves is the most effective to get ethanol from 99.5% purity with a power demand of 1400 Kj/kg of ethanol. We conclude that these results impacting positively on the economy of Peru by establishing a path of sustainable development both technically, economically, socially and environmentally.

In the processes of dissolution and adsorption of metals, the contribution of bacterial species previously adapted to specific environments, in order to achieve good results are required. In adapting Thiobacillus strains exist various mechanisms and reagents, as is the use of substances containing ideal nutrient media according to the effectiveness to achieve. For this reason we have modified the Middle 9k, with the aim of finding an appropriate means thereby increasing bacterial population isolated from strain Thiobacillus ferrooxidans Mining Salvage Unit, modifying the content of iron sulphate in the substrate and the strict control of pH . These values being 22.4 g / Lt iron sulfate and a pH of 1.8 A working conditions in the first 48 hours consumption of hydrogen protons is generated, which reduces acidity 2.3 - 2.4, with much less effect at low substrate concentrations. The producti...

The sample that is the object of this research work is a kind of bituminous coal, from the Mount Huáscar, province of Oyón, department of Lima. Provided by the Coal Mine Company. The mineralogical characterization of the sample coal, to show the presence of the following minerals: Graphite (grf) and Pyrite (py). The percentage distribution indicates graphite and 96,91% 3,09% pyrite, the particles are mostly free, accordingly modal analysis indicates that the degree of liberation of graphite and pyrite is 100%, that is counted all particles are free, as can be seen in the photos N.º 1, 2 ,3 and 4. Based on the characterization done it can be concluded that sulfur is in the pyrite, which is the polluter coal. Metallurgical tests were conducted preliminary gravity and flotation; being the outcome of the gravity is not satisfactory. The three tests metallurgical more representative of flo...