https://cirworld.com/index.php/jac/issue/feed JOURNAL OF ADVANCES IN CHEMISTRY 2017-12-12T07:26:48+00:00 Chief Editor jac@cirworld.com Open Journal Systems JAC is scientific, open access, scholarly, peer-reviewed, fully referred international journal with DOI, ISSN ICV and IF https://cirworld.com/index.php/jac/article/view/6316 Electrochemical andspectrastudies of some sulfa drug azodyes and their metal complexes in aqueous solution 2017-09-22T05:03:16+00:00 E.M. Mabrouk sbdmina@yahoo.com Kh.A.Al Omary emmabrouk90@yahoo.com A.S.Al- Omary sbdmina@yahoo.com E.H. El-Mossalamy sbdmina@yahoo.com <p>The electrochemical behavior of some azo compounds derived from sulfa drugs derivatives in B.R. buffer solutions of different pH containing 20 (v/v) ethanol was investigated at the mercury&nbsp; electrode using different techniques (DC,DPP,CV and Coulometry) to investigate the effect of medium on the electro reduction process and suggestion the electrode reaction mechanism. The obtained results denoted that these compounds were reduced undergo a single irreversible 4- electron polarographic wave in acid and neutral solutions which represent the cleavage of the N=N center to the amine stage, whereas in alkaline solution, two wave are obtained the second is 2-electron irreversible wave corresponding to the reduction ofCHO group to CH<sub>2</sub>OH. The DPP and CV data showed a single peak in solutions of pH&lt; 8, whereas three peaks are in alkaline solutions. The dissociation constants of the investigated compounds were determined by using spectrophotometric and potentiometric methods. Also the metal – ligand formation constants were determined potentiometrically and found in the order Cu˃ Co˃ Ni ˃Zn.</p> 2017-09-22T05:02:48+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jac/article/view/6277 Mathematical modeling of adsorption of Co2+ ions on sugarcane bagasse 2017-09-22T05:30:04+00:00 Hamid Taouil hamidsup@yahoo.fr <p>The main objective of this work is to study the mathematical modeling of the adsorption of Co<sup>2+</sup> ions on sugarcane bagasse (SCB) for approximate the nature of the adsorption. The together of results obtained show that the adsorption process is favorable for a chemisorption and monolayer. Also, the adsorption process is expressed by the second order kinetic law. Thus the negative values of ΔG° and the positive values of ΔH° opt for an endothermic and spontaneous process. Also, the positive values of ΔS° indicate the increase in the randomness at the solid / liquid interface during the adsorption of the Co<sup>2+</sup> metal ions.</p> 2017-09-22T05:30:03+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jac/article/view/6455 INVESTIGATION THE OLIGOMERIZATION PROCESS OF HEXENE-1 2017-12-12T07:26:48+00:00 Shahla Alizade selizade180@gmail.com IbragimovHikmet Jamal selizade180@gmail.com AmirovFariz Ali ibragimov-khikmet@rambler.ru AliyevFariz Ramik fariz_ar@hotmail.com <p>In article for oligomerization and alkylation processes, to obtain a useful and highly stable active catalyst, New Catalytic Complex (NCC) synthesized which is based on aluminum metal using C<sub>2</sub>H<sub>4</sub>Cl<sub>2 </sub>and this complex has shown high stability in alkylation, oligomerization processes compared to other aluminum-containing catalysts. It is difficult to regulate the molecular mass distribution of received products during oligomerization, either Intensificate the oligomerization process of olefins that is why this process take place in presence of obtaining of bimetal catalytic complex with a highly stable activity from the modification of the New Catalytic Complex(NCC) with transition metal chloride. Comparatively studied oligomerization of Hexen-1 in present of new bimetallic catalytic complex which was modified by NCC and chromium salt (NCC/CrCl<sub>3</sub>), effect of temperature, reaction time, concentration of the catalyst and the proportion of catalyst components (Al:Cr) in the process was investigated.It was determined that at the initial time (10 min) conversion hexene-1 and the yield of purposeful oil fraction were low. Increasing time, conversion rate of Hexen-1 increases and the optimal time for the process is considered as 60 minutes. In low concentrations of catalyst (0,1-0,3)&nbsp; oligomerization of hexene-1 is low but in high concentrations(&gt;1%) reaction goes with high rate, at optimal concentration 0,5% mass both the yield of oil fraction and its chemical-physical properties were high.In oligomerization process investigated&nbsp; ratio effect of catalyst components Al: Cr that was used&nbsp; Al: Cr=(4-32):1 mol.It has been revealed that oligomerization of Hexen-1, at low mol ratio of components (4:1), received yield of oligomer fraction decreases while mol ratio increases (16:1, 32:1).Studies determined that bimetallic complex at 8:1 mole has shown the maximal activity in&nbsp; oligomerization process of Hexen-1.The effect of the temperature on the oligomerization process was studied in the range of 30-60ºC, increasing the temperature up to 50 °C has a positive effect on the course of the process and despite providing complete oligomerization of hexene-1 its also providing increasing the amount of oil fractions with high viscosity. According to the researches, the optimal conditions for the oligomerization process of hexene-1 with the participation of the bimetallic catalytic complex: reaction time – 60 min., concentration of catalyst – 0,5 % by wt., mol ration of components Al:Cr = 8:1, temperature – 50 °C. In known optimal condition its possible to obtain oligomers with physical indications, characterized by narrow molecular mass distribution, by new catalytic complex that was modified by chromium salt.Such products have special importance, as low-freezing, high viscosity index qualitative engine oils.Synthesis of bimetallic catalytic complexes, with their presence in oligomerization of olefins and fractions, opens wide range perspectives in synthesis of different high-molecular compounds in industry</p> 2017-12-12T07:26:48+00:00 ##submission.copyrightStatement##