Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
22
2
2003
12
01
Extension of Linear Isotherm Regularity to Long Chain Alkanes
1
8
EN
Gholamabbas
Parsafar
Department of Chemistry, Sharif University of Technology, P.O.Box 11365-9465, Tehran, I.R. IRAN
Zahra
Kalantar
Department of Chemistry, Isfahan University of Technology, Isfahan, I.R. IRAN
10.30492/ijcce.2003.7640
<em>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.</em> <em> </em>
Equation of state,Group contribution method,Average effective pair potential
https://ijcce.ac.ir/article_7640.html
https://ijcce.ac.ir/article_7640_f2795584f8eb8c87c97b94ac6fe7fd2b.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
22
2
2003
12
01
Oxidation of Hantzsch 1,4- Dihydropyridines to Pyridines with Thallium Triacetate
9
11
EN
Mohammad
Mahmoodi Hashemi
Department of Chemistry, Sharif University of Technology, P. O. Box 11365-9516, Tehran, I.R. IRAN
Mohammad Sadegh
Zakeri
Department of Chemistry, Sharif University of Technology, P. O. Box 11365-9516, Tehran, I.R. IRAN
Saeed
Arianfar
Department of Chemistry, Sharif University of Technology, P. O. Box 11365-9516, Tehran, I.R. IRAN
10.30492/ijcce.2003.8172
<em>Hantzsch 1, 4-dihydropyridines (1,4-DHPs) can be oxidized to the corresponding pyridine derivatives by thallium triacetate in high yields.</em>
Oxidation,Thallium triacetate,Hantzsch dihydropyridines,Pyridine
https://ijcce.ac.ir/article_8172.html
https://ijcce.ac.ir/article_8172_e2536a618d1b5f544a9056f52a9883bb.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
22
2
2003
12
01
Synthesis of N, N΄3, 4-Dialkylamino-1, 2, 5-Oxadiazoles
13
15
EN
Ali
Kakanejadifardi
Department of Chemistry, Faculty of Science, University of Lorestan, Khorramabad, Lorestan. I.R. IRAN
Farshad
Delfani
Department of Chemistry, Faculty of Science, University of Lorestan, Khorramabad, Lorestan. I.R. IRAN
Bijan
Ranjbar
Department of Biology, Faculty of Science, University of Tarbiat Modares, Tehran. I.R. IRAN
10.30492/ijcce.2003.8173
<em>N, N</em><em>΄</em><em>-3, 4</em><em>-di(methylamino)-1, 2, 5-oxadiazole (1f) was prepared by dehydration of </em><em>N, N</em><em>΄</em><em>-3, 4-di(methylamino)glyoxime (2f) in aqueous potassium hydroxid at 170-180 ˚C. Under similar conditions </em><em>N, N</em><em>΄</em><em>-3, 4</em><em>-di(benzylamino)-1, 2, 5-oxadiazole (1c) and N, N</em><em>΄</em><em>-3, 4</em><em>-di(isopropylamino)-1, 2, 5-oxadiazole (1e) were not obtained, but, N, N</em><em>΄</em><em>-3, 4</em><em>-di(ethylamino)-1, 2, 5-oxadiazole (1g) was appeared with small amount. </em>
N, N΄-3, 4-di(methylamino)-1,2, 5-Oxadiazole,Dehydration,N΄-disubstituted Diaminoglyoxime,Dichloroglyoxime
https://ijcce.ac.ir/article_8173.html
https://ijcce.ac.ir/article_8173_264032f00af1ad9fab87118322ca54c5.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
22
2
2003
12
01
Potentiometric Study of Complex Formation Between Some Transition Metal Ions and 2 - Aminopyridine. Part 1. A Model for Therapeutic Agent for Wilson’s Disease
17
21
EN
Mohammad
Joshaghani
Department of Chemistry, Faculty of Science, Razi University, P.O. Box 67148, Kermanshah, I.R. IRAN
ioshaghanim@yahoo.com
Masoud
Sotodehnejad
Department of Chemical Research, ACECR, Kermanshah, I.R. IRAN
10.30492/ijcce.2003.8175
<em>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, ML<sub>2</sub>, ML<sub>3</sub>, and ML<sub>2</sub>(OH)<sub>2</sub>. For ML complexes the order of stability confirms the Irwing-Williams series.</em>
Potentiometry,Complex formation,Stability constant,2-Amino pyridine,Wilson’s disease
https://ijcce.ac.ir/article_8175.html
https://ijcce.ac.ir/article_8175_09b5de5da3af40324f7919d47f75cd12.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
22
2
2003
12
01
A Comprehensive Empirical Correlation for prediction of Supersolubility and Width of the Metastable Zone in Crystallization
23
34
EN
Iraj
Naser
Science and Research Campus, Department of Chemical Engineering, Islamic Azad University, Hesarak, Poonak Tehran, I.R. IRAN
i.naser@namvaran.com
Mehrdad
Manteghian
Faculty of Engineering, Tarbiat Modarres University, P.O. Box 14155-4838, Tehran, I.R. IRAN
Dariush
Bastani
Department of Chemical Engineering, Sharif University of Technology, Tehran, I.R. IRAN
Mohsen
Mohammadzadeh
Faculty of Engineering, Tarbiat Modarres University, P.O. Box 14155-4838, Tehran, I.R. IRAN
10.30492/ijcce.2003.8176
<em>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. The</em><em>concept may be equally applicable in nucleation of organic materials and for cases where liquid nuclei (such as rain droplets) are formed.</em>
Particle formation,Nucleation,Supersolubility,Metastable zone,Modelling,Mathematical
https://ijcce.ac.ir/article_8176.html
https://ijcce.ac.ir/article_8176_4eaa42abbfc9cdff9e637802952e649d.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
22
2
2003
12
01
Simulation and Model Validation of Batch PHB Production Process Using Ralstonia eutropha
35
42
EN
Shahrokh
Shahhosseini
Department of Chemical Engineering , Iran University of Science and Technology, P.o. Box 16765-163 Tehran, I.R. IRAN
shahrokh@iust.ac.ir
Mohammad Taghi
Sadeghi
Department of Chemical Engineering , Iran University of Science and Technology, P.o. Box 16765-163 Tehran, I.R. IRAN
Kianoush
Khosravi Darani
Department of Biotechnology, School of Engineering, Tarbiat Modares University, Tehran, I.R. IRAN
10.30492/ijcce.2003.8177
<em>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. </em>
Poly (ß-hydroxybutyrate) (PHB),Ralstonia eutropha,Batch culture,Modeling
https://ijcce.ac.ir/article_8177.html
https://ijcce.ac.ir/article_8177_932ab78a5d7b228b2896edf01e07aba9.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
22
2
2003
12
01
Shape Selective Alkylation of Biphenyl with 1-octene on ((Al+C3H7Cl)+C2H4) Catalysts
43
48
EN
Sevil
Veli (Veliyeva)
Department of Environmental Engineering, University of Kocaeli, 41001, İzmit-TURKEY
sevilv@kou.edu.tr
10.30492/ijcce.2003.8178
<em>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. </em>
Shape-selectivity,((Al+C3H7Cl)+C2H4) catalyst,Alkylation of biphenyl,1-octene,Catalytic activity
https://ijcce.ac.ir/article_8178.html
https://ijcce.ac.ir/article_8178_4b6c97ae804c3373c9f2ddf10aafc382.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
22
2
2003
12
01
Reaction of Sodium Azide with 1,1'–Dicyclohexenyl–Diepoxides
49
53
EN
Mohammad Raouf
Darvich
Department of Chemistry, Faculty of Science, University of Tehran, Tehran, I.R. IRAN
darvich@ut.ac.ir
Abolfazl
Olyai
Department of Chemistry, Faculty of Science, University of Tehran, Tehran, I.R. IRAN
Akbar
Shabanikia
Department of Chemistry, Faculty of Science, University of Tehran, Tehran, I.R. IRAN
Dariush
Farkhani
Research Institute of Petroleum Industry, National Iranian Oil Company, Tehran, I.R. IRAN
10.30492/ijcce.2003.8179
<em>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.</em>
Sodium azide,1,1' – Dicyclohexenyl – diepoxides,Nucleophilic opening,Azido-alcohols,Trans diaxial
https://ijcce.ac.ir/article_8179.html
https://ijcce.ac.ir/article_8179_61214f2cb05a0d3157b0419512aec91b.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
22
2
2003
12
01
Solid Phase Extraction of Ultra Trace Amounts of Ni2+ by Dimethylglyoxime (DMG) Immobilized on Column
55
59
EN
Farzaneh
Shemirani
Department of Chemistry, Faculty of Science, University of Tehran, P.O. Box 14155-6455 Tehran, I.R. IRAN
shemiran@khayam.ut.ac.ir
Mahdi
Zamani
Department of Chemistry, Faculty of Science, University of Tehran, P.O. Box 14155-6455 Tehran, I.R. IRAN
Mohammad Reza
Jamali
Department of Chemistry, Faculty of Science, University of Tehran, P.O. Box 14155-6455 Tehran, I.R. IRAN
10.30492/ijcce.2003.8180
<em>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.</em>
Nickel determination,Atomic absorption spectrometry,surfactant,Dimetylglyoxim
https://ijcce.ac.ir/article_8180.html
https://ijcce.ac.ir/article_8180_311f897cfdfdcf426fc93240188d77eb.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
22
2
2003
12
01
Modeling of Anaerobic Digestion of Complex Substrates
61
74
EN
Ali Reza
Keshtkar
Atomic Energy Organization of Iran, P.O. Box 11365-8486, Tehran, I.R. IRAN &
Department of Chemical Engineering, Tehran University, P.O. Box 11365-4563, Tehran, I.R. IRAN
Gity
Abolhamd
Department of Chemical Engineering, Tehran University, P.O. Box 11365-4563, Tehran, I.R. IRAN
abolhamd@ut.ac.ir
Behrooz
Meyssami
Department of Chemical Engineering, Tehran University, P.O. Box 11365-4563, Tehran, I.R. IRAN
Hossein
Ghaforian
Atomic Energy Organization of Iran, P.O. Box 11365-8486, Tehran, I.R. IRAN
10.30492/ijcce.2003.8181
<em>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.</em>
Anaerobic digestion,dynamic modeling,Two-region mixing model,Cyclic-batch reactor,Complex substrates,Biogas
https://ijcce.ac.ir/article_8181.html
https://ijcce.ac.ir/article_8181_fb39e734b0a770573a0040219ea38b83.pdf