The objective of the present investigation is to show the synthesis of the catalytic systems Ni, Ni-W and Ni-Cu-W supported on alpha alumina by impregnation method, the characterization of the catalytic systems by XPS, TPR and SEM. The results of the XRD analysis show that the metallic components are as NiO, CuO and W03 oxides. The TPR results show the existence of the synergic effect in the bimetallic and tree-metallic alpha alumina supported systems. Finally, the results of the SEM show the micrography and the surface composition of the catalysts: Ni-W/α-Al3 y Ni-Cu-W/α-Al2, respectively.

En el presente trabajo se reporta la síntesis de sistemas catalíticos de Ni, Ni-W y Ni-Cu-W soportados en alfa alúmina por el método de impregnación previo secado y calcinado, y su caracterización por DRX, TPR y SEM. Los resultados de DRX muestran que los componentes metálicos se encuentran en forma de óxidos NiO, CuO y W03 . Los resultados de TPR prueban la existencia del efecto de cinergía entre los componentes metálicos en los sistemas binarios y ternarios. Finalmente, los resultados del SEM muestran la micrografía y la composición superficial en porcentaje en peso, de los catalizadores Ni-W/α-Al2O3 y Ni-Cu-W/α-Al2O3 , respectivamente.

Due to the importance that has the ZSM-5 zeolitic catalyst in the acid form or in the modified form with transition metals by it’s application in catalytic alkylation, transalkylation, isomerization and polymerization reactions of aromatic compounds and by it’s characteristic properties, like as: a great surface area, adsorption capacity, structure that permit the active sites creation and one excellent form selectivity. In the present investigation it’s show the synthesis of NaZSM-5 zeolite with atomic relation (Si/Al) = 140 , the preparation of HZSM-5 catalyst by ionic interchange method. Moreover, it’s show the characterization of the synthesized zeolites by FTIR and by XRD. So, the FTIR band spectrums of Na ZSM-5 and HZSM-5 dried and calcined, respectively, show the peculiars bands to the characteristics vibrations presents in the ZSM-5 zeolites. Finally, the XRD results show...

Due to the importance that has the ZSM-5 zeolitic catalyst in the acid form or in the modified form with transition metals by it’s application in catalytic alkylation, transalkylation, isomerization and polymerization reactions of aromatic compounds and by it’s characteristic properties, like as: a great surface area, adsorption capacity, structure that permit the active sites creation and one excellent form selectivity. In the present investigation it’s show the synthesis of NaZSM-5 zeolite with atomic relation (Si/Al) = 140 , the preparation of HZSM-5 catalyst by ionic interchange method. Moreover, it’s show the characterization of the synthesized zeolites by FTIR and by XRD. So, the FTIR band spectrums of Na ZSM-5 and HZSM-5 dried and calcined, respectively, show the peculiars bands to the characteristics vibrations presents in the ZSM-5 zeolites. Finally, the XRD results show...

Seeds of chirimoya and guanabana from the communities of Cumbe and Callahuanca - Yauyos, Lima were analyzed. The extraction of natural toxic was realized using ethanol as the optimal solvent, after several solvent tests, phytochemicals analysis identified :saponins, coumarins, tannins, quinones and essential oils, mostly castor oil which was confirmed by FTIR spectra. Qualitative analysis results identified: PO4(3-), AsO4(3-) and others. Toxicological tests extracts applied on larvae and fruit flies finding levels of mortality as 88% to 94% on chirimoyas and guanabanas respectively.

Seeds of chirimoya and guanabana from the communities of Cumbe and Callahuanca - Yauyos, Lima were analyzed. The extraction of natural toxic was realized using ethanol as the optimal solvent, after several solvent tests, phytochemicals analysis identified :saponins, coumarins, tannins, quinones and essential oils, mostly castor oil which was confirmed by FTIR spectra. Qualitative analysis results identified: PO4(3-), AsO4(3-) and others. Toxicological tests extracts applied on larvae and fruit flies finding levels of mortality as 88% to 94% on chirimoyas and guanabanas respectively.