@article { author = {Parsafar, Gholamabbas and Kalantar, Zahra}, title = {Extension of Linear Isotherm Regularity to Long Chain Alkanes}, journal = {Iranian Journal of Chemistry and Chemical Engineering}, volume = {22}, number = {2}, pages = {1-8}, year = {2003}, publisher = {Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR}, issn = {1021-9986}, eissn = {}, doi = {10.30492/ijcce.2003.7640}, abstract = {In this work, we consider each normal alkane as a hypothetical mixtureof methyland methylene groups, in which the interaction potential of each pair is assumed to be the average effective pair potential. Then, the LIR equation of state (EOS) is extended for such a hypothetical mixture. Also, three basic compounds, namely, propane, n-butane and cyclohexane, are used to obtain the contribution of each carbonic group in the EOS parameters. Using the calculated EOS parameters along with the modified EOS, the density of n-alkanes and their mixtures at different pressures and temperatures are calculated. The average percentage error in density is found to be less than 1.5% for both the pure normal alkanes and their binary mixtures.  }, keywords = {Equation of state,Group contribution method,Average effective pair potential}, url = {https://ijcce.ac.ir/article_7640.html}, eprint = {https://ijcce.ac.ir/article_7640_f2795584f8eb8c87c97b94ac6fe7fd2b.pdf} } @article { author = {Mahmoodi Hashemi, Mohammad and Zakeri, Mohammad Sadegh and Arianfar, Saeed}, title = {Oxidation of Hantzsch 1,4- Dihydropyridines to Pyridines with Thallium Triacetate}, journal = {Iranian Journal of Chemistry and Chemical Engineering}, volume = {22}, number = {2}, pages = {9-11}, year = {2003}, publisher = {Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR}, issn = {1021-9986}, eissn = {}, doi = {10.30492/ijcce.2003.8172}, abstract = {Hantzsch 1, 4-dihydropyridines (1,4-DHPs) can be oxidized to the corresponding pyridine derivatives by thallium triacetate in high yields.}, keywords = {Oxidation,Thallium triacetate,Hantzsch dihydropyridines,Pyridine}, url = {https://ijcce.ac.ir/article_8172.html}, eprint = {https://ijcce.ac.ir/article_8172_e2536a618d1b5f544a9056f52a9883bb.pdf} } @article { author = {Kakanejadifardi, Ali and Delfani, Farshad and Ranjbar, Bijan}, title = {Synthesis of N, N΄3, 4-Dialkylamino-1, 2, 5-Oxadiazoles}, journal = {Iranian Journal of Chemistry and Chemical Engineering}, volume = {22}, number = {2}, pages = {13-15}, year = {2003}, publisher = {Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR}, issn = {1021-9986}, eissn = {}, doi = {10.30492/ijcce.2003.8173}, abstract = {N, N΄-3, 4-di(methylamino)-1, 2, 5-oxadiazole (1f) was prepared by dehydration of N, N΄-3, 4-di(methylamino)glyoxime (2f) in aqueous potassium hydroxid at 170-180 ˚C. Under similar conditions N, N΄-3, 4-di(benzylamino)-1, 2, 5-oxadiazole (1c) and N, N΄-3, 4-di(isopropylamino)-1, 2, 5-oxadiazole (1e) were not obtained, but, N, N΄-3, 4-di(ethylamino)-1, 2, 5-oxadiazole (1g) was appeared with small amount. }, keywords = {N, N΄-3, 4-di(methylamino)-1,2, 5-Oxadiazole,Dehydration,N΄-disubstituted Diaminoglyoxime,Dichloroglyoxime}, url = {https://ijcce.ac.ir/article_8173.html}, eprint = {https://ijcce.ac.ir/article_8173_264032f00af1ad9fab87118322ca54c5.pdf} } @article { author = {Joshaghani, Mohammad and Sotodehnejad, Masoud}, title = {Potentiometric Study of Complex Formation Between Some Transition Metal Ions and 2 - Aminopyridine. Part 1. A Model for Therapeutic Agent for Wilson’s Disease}, journal = {Iranian Journal of Chemistry and Chemical Engineering}, volume = {22}, number = {2}, pages = {17-21}, year = {2003}, publisher = {Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR}, issn = {1021-9986}, eissn = {}, doi = {10.30492/ijcce.2003.8175}, abstract = {The complexation reactions of some transition metal ions and 2-aminopyridine (2-ampy) were studied potentiometrically in aqueous solution at µ=0.1 M and 25 °C. The overall stability constants log β’s of all species are obtained by computer refinement of pH-volume data with using the BEST computer program. Several models were tested and the best one accepted according to the least sum of squared deviations. The main species are MHL, ML, ML2, ML3, and ML2(OH)2. For ML complexes the order of stability confirms the Irwing-Williams series.}, keywords = {Potentiometry,Complex formation,Stability constant,2-Amino pyridine,Wilson’s disease}, url = {https://ijcce.ac.ir/article_8175.html}, eprint = {https://ijcce.ac.ir/article_8175_09b5de5da3af40324f7919d47f75cd12.pdf} } @article { author = {Naser, Iraj and Manteghian, Mehrdad and Bastani, Dariush and Mohammadzadeh, Mohsen}, title = {A Comprehensive Empirical Correlation for prediction of Supersolubility and Width of the Metastable Zone in Crystallization}, journal = {Iranian Journal of Chemistry and Chemical Engineering}, volume = {22}, number = {2}, pages = {23-34}, year = {2003}, publisher = {Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR}, issn = {1021-9986}, eissn = {}, doi = {10.30492/ijcce.2003.8176}, abstract = {Prediction of supersolubility and the width of the metastable zone has been a major concern among the workers in the field of industrial crystallization. Operation of crystallizers under the optimum supersaturation low enough to attain the desired product quality (Median Particle Size, Crystal Size Distribution (CSD), Shape, Purity) being one motif. The inherent relationship between the subject and the most fundamental concepts of crystallization being the other. Studying the conditions of primary homogenous nucleation and the crystal growth kinetics has been conducted for a wide range of inorganic materials. A simple probabilistic term called chance of having the desirable species congregation, has been introduced to account for the effect of solution composition. A semi-empirical model has been developed for occasions where primary homogenous nucleation occurs at a specified undercooling rate (0.2 oC/hr). The model has been found to satisfy the experimental results obtained for 28 inorganic systems under various conditions. Theconcept may be equally applicable in nucleation of organic materials and for cases where liquid nuclei (such as rain droplets) are formed.}, keywords = {Particle formation,Nucleation,Supersolubility,Metastable zone,Modelling,Mathematical}, url = {https://ijcce.ac.ir/article_8176.html}, eprint = {https://ijcce.ac.ir/article_8176_4eaa42abbfc9cdff9e637802952e649d.pdf} } @article { author = {Shahhosseini, Shahrokh and Sadeghi, Mohammad Taghi and Khosravi Darani, Kianoush}, title = {Simulation and Model Validation of Batch PHB Production Process Using Ralstonia eutropha}, journal = {Iranian Journal of Chemistry and Chemical Engineering}, volume = {22}, number = {2}, pages = {35-42}, year = {2003}, publisher = {Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR}, issn = {1021-9986}, eissn = {}, doi = {10.30492/ijcce.2003.8177}, abstract = {Mathematical modeling and simulation of microbial Polyhydroxybutyrate (PHB) production process is beneficial for optimization, design, and control purposes. In this study a batch model developed by Mulchandani et al., [1] was used to simulate the process in MATLAB environment. It was revealed that the kinetic model parameters were estimated off the optimal or at a local optimal point. Therefore, an optimization program was written using MATLAB codes to estimate those parameters again. It resulted in a significant improvement in the accuracy of Mulchandani’s kinetic model. The batch model was evaluated using two batch experiments performed in this work and also Mulchandani’s batch data when kinetic model parameter values estimated in this work were used. Visual comparisons between the model profiles and experimental data indicate that the model represents the process reasonably. A goodness of fit criterion used in this work and some similar researches proved higher accuracy of Mulchandani’s model using this work’s kinetic parameter values compared to other models. Theoretical model verification was also performed that lead to identification of the possible limitations of the model. }, keywords = {Poly (ß-hydroxybutyrate) (PHB),Ralstonia eutropha,Batch culture,Modeling}, url = {https://ijcce.ac.ir/article_8177.html}, eprint = {https://ijcce.ac.ir/article_8177_932ab78a5d7b228b2896edf01e07aba9.pdf} } @article { author = {Veli (Veliyeva), Sevil}, title = {Shape Selective Alkylation of Biphenyl with 1-octene on ((Al+C3H7Cl)+C2H4) Catalysts}, journal = {Iranian Journal of Chemistry and Chemical Engineering}, volume = {22}, number = {2}, pages = {43-48}, year = {2003}, publisher = {Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR}, issn = {1021-9986}, eissn = {}, doi = {10.30492/ijcce.2003.8178}, abstract = {Alkylation of biphenyl with 1-octene was investigated using ((Al+C3H7Cl)+C2H4) catalysts. The catalytic activity of ((Al+C3H7Cl)+C2H4) for the alkylation was studied at different temperatures, mol ratios of biphenyl to 1-octene, reaction times and catalyst concentrations. It was shown that using this catalyst has more advantagous than another catalysts. Experiments show that by increasing temperature the alkylation process accelerates and the amounts of obtained octylbiphenyls increases. It is observed that selectivity of monooctylbiphenyls increases by increasing catalyst concentration and mol ratio of biphenyl to 1-octene. Optimum conditions were determined for mono-, di- and polyoctylbiphenyls. }, keywords = {Shape-selectivity,((Al+C3H7Cl)+C2H4) catalyst,Alkylation of biphenyl,1-octene,Catalytic activity}, url = {https://ijcce.ac.ir/article_8178.html}, eprint = {https://ijcce.ac.ir/article_8178_4b6c97ae804c3373c9f2ddf10aafc382.pdf} } @article { author = {Darvich, Mohammad Raouf and Olyai, Abolfazl and Shabanikia, Akbar and Farkhani, Dariush}, title = {Reaction of Sodium Azide with 1,1'–Dicyclohexenyl–Diepoxides}, journal = {Iranian Journal of Chemistry and Chemical Engineering}, volume = {22}, number = {2}, pages = {49-53}, year = {2003}, publisher = {Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR}, issn = {1021-9986}, eissn = {}, doi = {10.30492/ijcce.2003.8179}, abstract = {Nucleophilic ring opening of dl and meso 1,1¢- dicyclohexenyl diepoxides by sodium azide in dioxane and aqueous alcoholic medium give the corresponding azidoalcohols. The obtention of departure diepoxides from diazidoalcohols by the reaction with sodium hydride shows the anti position of OH and N3 groups.}, keywords = {Sodium azide,1,1' – Dicyclohexenyl – diepoxides,Nucleophilic opening,Azido-alcohols,Trans diaxial}, url = {https://ijcce.ac.ir/article_8179.html}, eprint = {https://ijcce.ac.ir/article_8179_61214f2cb05a0d3157b0419512aec91b.pdf} } @article { author = {Shemirani, Farzaneh and Zamani, Mahdi and Jamali, Mohammad Reza}, title = {Solid Phase Extraction of Ultra Trace Amounts of Ni2+ by Dimethylglyoxime (DMG) Immobilized on Column}, journal = {Iranian Journal of Chemistry and Chemical Engineering}, volume = {22}, number = {2}, pages = {55-59}, year = {2003}, publisher = {Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR}, issn = {1021-9986}, eissn = {}, doi = {10.30492/ijcce.2003.8180}, abstract = {A column of alumina modified with sodium dodecyl sulfate (SDS) and dimethylglyoxime (DMG) was prepared for the preconcentration of trace nickel from water samples for flame atomic absorption spectrometry (FAAS) determinations. Under optimized conditions (pH=7.0; flow rate: 20 mlmin-1) nickel was retained on the column. The nickel collected on the column was eluted with 5 mL of 1 M nitric acid. Recovery was greater than 98%. A concentration factor of 200 can be achieved by passing 1000mL of sample through the column. The relative standard deviation (10 replicate analyses) at the 200 ngml-1 level for nickel was 2.2% and the corresponding limit of detection (based on 3σ) was 0.82 ngml-1. The method was applied to the determination of nickel in row solution for nickel plating.}, keywords = {Nickel determination,Atomic absorption spectrometry,surfactant,Dimetylglyoxim}, url = {https://ijcce.ac.ir/article_8180.html}, eprint = {https://ijcce.ac.ir/article_8180_311f897cfdfdcf426fc93240188d77eb.pdf} } @article { author = {Keshtkar, Ali Reza and Abolhamd, Gity and Meyssami, Behrooz and Ghaforian, Hossein}, title = {Modeling of Anaerobic Digestion of Complex Substrates}, journal = {Iranian Journal of Chemistry and Chemical Engineering}, volume = {22}, number = {2}, pages = {61-74}, year = {2003}, publisher = {Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR}, issn = {1021-9986}, eissn = {}, doi = {10.30492/ijcce.2003.8181}, abstract = {A structured mathematical model of anaerobic conversion of complex organic materials in non-ideally cyclic-batch reactors for biogas production has been developed. The  model is based on multiple-reaction stoichiometry (enzymatic hydrolysis, acidogenesis, acetogenesis and methanogenesis), microbial growth kinetics, conventional material balances in the liquid and gas phases for a cyclic-batch reactor, liquid-gas interactions, liquid-phase equilibrium reactions and a simple mixing model which considers the reactor volume in two separate sections: the flow-through and the retention regions. The dynamic model describes the effects of reactant’s distribution resulting from the mixing conditions, time interval of feeding, hydraulic retention time and mixing parameters on the process performance. The model is applied in the simulation of anaerobic digestion of cattle manure under different operating conditions. The model is compared with experimental data and good correlations are obtained.}, keywords = {Anaerobic digestion,dynamic modeling,Two-region mixing model,Cyclic-batch reactor,Complex substrates,Biogas}, url = {https://ijcce.ac.ir/article_8181.html}, eprint = {https://ijcce.ac.ir/article_8181_fb39e734b0a770573a0040219ea38b83.pdf} }