Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
17
2
1998
12
01
A New Tri-Parametrical Law of Corresponding States for Subcritical Dense Fluids
49
53
EN
Gholam Abbas
Parsafar
Department of Chemistry, Isfahan University of Technology, Zip code 84154, Isfahan, I.R. IRAN
parsafar@sharif.edu
Yousef
Ghayeb
Department of Chemistry, Isfahan University of Technology, Zip code 84154, Isfahan, I.R. IRAN
10.30492/ijcce.1998.9935
<em>This article introduces a new tri-parameter law of corresponding states from the known regularities, namely the LIR and Zeno line for dense fluids (when Tz=T<sub>c</sub>). Two of these parameters are the Zeno line parameters and the third parameter (the fluid parameter), has been obtained from the LIR, this parameter is solely dependent upon the fluid characteristics. The third parameter can be obtaind from p-v-T data of at least two different isotherms of the fluid. These three parameters enable us to calculate quantities such as the density of the fluid, within a reasonable accuracy (the maximum error is less than 5%). Comparing the calculated results with the experimental values shown that this law can at least be applied to spherical, polar and hydrocarbon fluids.</em>
Corresponding states,Supercritical,Dense fluid,Fluid parameter
https://ijcce.ac.ir/article_9935.html
https://ijcce.ac.ir/article_9935_573e93a401ab829411c74e1321b1ee78.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
17
2
1998
12
01
Determination of Polycyclic Aromatic Hydrocarbons in Ambient Urban Air
54
57
EN
Seyed Morteza
Talebi
Department of Chemistry, Isfahan University, Zip code 81774, Isfahan, I.R. IRAN
10.30492/ijcce.1998.9936
<em>Polycyclic aromatic hydrocarbons (PAH<sub>S</sub>) have been determined in the atmosphere of Isfahan, Iran. Airborne particulate matter was sampled using a high-volume air sampler at roof-top level (~6m). Extraction of PAH<sub>S</sub> from airborne particulate matter has been performed using SFE system and the relationship between the extraction temperature and the recovery of PAH<sub>S</sub> from airborne particulates is </em>investigated. <em>Determination of 16 PAH<sub>S</sub> has been carried out by GC-MS technique. Variation in concentration of PAH<sub>S</sub> has been compared to those for organic carbon and total suspended particles (TSP). A good agreement was found between the variation in concentration of PAH<sub>S</sub> and that for organic carbon, but weak correlation (p=0.6, r<sup>2</sup>=0.42) was found to exist between the PAH<sub>S</sub> and TSP</em>
Air pollution,Polycyclic aromatic hydrocarbons,Airborne particulate matter,Extraction of PAHS by SFE
https://ijcce.ac.ir/article_9936.html
https://ijcce.ac.ir/article_9936_366fb0cfa89710b3d2c428212d15b883.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
17
2
1998
12
01
Stannous Chloride: A Reagent for Removal of Dimethoxytrityl Group from 5'-Dimethoxytrityl Nucleosides
58
60
EN
Ali
Khalafi Nezhad
Department of Chemistry, Faculty of Science, Shiraz University, Zip code 71454, Shiraz, I.R. IRAN
Reza
Fareghi Alamdari
Department of Chemistry, Faculty of Science, Shiraz University, Zip code 71454, Shiraz, I.R. IRAN
10.30492/ijcce.1998.10295
<em>Detritylation of 5'-dimethoxytrityl nucleosides have been quantitatively achieved in minutes at room temperature under aprotic neutral conditions by using stannous chloride. Of additional practical consideration and in contrast to protic acids, no depurination was observed with this reagent.</em>
Deprotection,5'-Dimethoxytrityl group,Nucleosides
https://ijcce.ac.ir/article_10295.html
https://ijcce.ac.ir/article_10295_8704c645723827cb44d8be2de0545407.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
17
2
1998
12
01
Multinuclear Variable Temperature NMR Studies on Cyanide, Water and Hydroxyl Group Scrambling on Halogenation of K2[Pt(CN)4] and Related Reactions
61
65
EN
Javad
Sabounchei
Department of Chemistry, Faculty of Science, Bu-Ali-Sina University, Zip code 65174, Hamadan, I.R. IRAN
Sadegh
Salehzadeh
Department of Chemistry, Faculty of Science, Bu-Ali-Sina University, Zip code 65174, Hamadan, I.R. IRAN
10.30492/ijcce.1998.10297
<em><sup>195</sup></em><em>Pt and <sup>1</sup>H NMR has been used to show that addition of chlorine and bromine to [Pt(CN)<sub>4</sub>]<sup>2_</sup> in presence of perchloric acid in water results in cyanide and water scrambling with formation of eleven complexes of the type [Pt(CN)<sub>4-n</sub>Cl(H<sub>2</sub>O)<sub>n+1</sub>]<sup>(n-1)+</sup> (n=0, 1, 2, 3, 4). Addition of NBu<sub>4</sub>OH to this solution gives (NBu<sub>4</sub>)<sub>2</sub>[Pt(CN)<sub>4</sub>Cl(OH)]. NMR measurements in acetone also show cyanide and hydroxyl group scrambling with formation of complexes of the type [Pt(CN)<sub>4-n</sub>Cl(OH)<sub>n+1</sub>]<sup>2-</sup>, (n=0, 1, 2, 3, 4).</em>
Multinuclear NMR,Scrambling,Halogenation
https://ijcce.ac.ir/article_10297.html
https://ijcce.ac.ir/article_10297_6fb062bf13c3b3bc764aead0d1eabc46.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
17
2
1998
12
01
Nitroimidazoles XIII. Synthesis of Substituted (1-Methyl-5-Nitro-2-Imidazolyl) Isoxazoles
66
69
EN
Abbas
Shafiee
Department of Chemistry, Faculty of Pharmacy, The Medical Science University of Tehran, Zip code 14174, Tehran, I.R. IRAN
shafieea@tims.ac.ir
Mohammad ALi
Ebrahimzadeh
Department of Chemistry, Faculty of Pharmacy, The Medical Science University of Tehran, Zip code 14174, Tehran, I.R. IRAN
10.30492/ijcce.1998.10300
<em>The beta0diketone derivatives of nitroimidazole were synthesized from the reaction of magnesium salt of beta-ketoaccids 3 with imidazolide 4. The raction of beta-diketones with hydroxylamine hydrochloride afforded either the isoxazoles or the 5-hydroxyl-2-isoxazolines.</em>
Beta-diketones,Nitroimidazole,Imidazolide,Isoxazoles,Isoxazoline
https://ijcce.ac.ir/article_10300.html
https://ijcce.ac.ir/article_10300_ab5284f77dd9ffdf059d039b05f109d7.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
17
2
1998
12
01
A Simple Method for Evaluating the Cleaning Power of Commercial Detergents
70
72
EN
Mohammad
Chalkosh Amiri
Department of Chemical Engineering, Isfahan University of Technology, Zip code 84156, Isfahan, I.R. IRAN
amir33@cc.iut.ac.ir
10.30492/ijcce.1998.10301
<em>Commercial detergents, in spite of their various names and marks, are used to remove foreign matter (dirt) from substrate. Following removal of dirt from the surface, it is necessary to prevent redeposition, so the detergent must have supending power. In this experimental work, a simple method has been developed to evaluate the cleaning power of commercial detergents. The method, showing the change of surface tension of detergent solution versus concentration, makes possible the dynamic study of the cleaning power of different commercial detergents without concerning their formulation. It has been found that the method differentiates between various detergents. The examined detergents were: Arial, Barf, Bianco, Darya, Paak, Persil, Sepid, Shoma, Vash and Yes.</em>
Commercial detergents,Cleaning power,Dynamically,Evaluation
https://ijcce.ac.ir/article_10301.html
https://ijcce.ac.ir/article_10301_6f766f32d22bc134bbf56f2e672e968a.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
17
2
1998
12
01
Optimizing of SCP Production from Sugar Beet Stillage Using Isolated Yeast
73
80
EN
Seyed Abbas
Shojaosadati
Biotechnology Group, Department of Chemical Engineering, Tarbiat Modares University, P.O. Box 14155-4838, Tehran, I.R. IRAN
shoja_sa@modares.ac.ir
Rasoul
Khalilzadeh
Biotechnology Group, Department of Chemical Engineering, Tarbiat Modares University, P.O. Box 14155-4838, Tehran, I.R. IRAN
Hamid Reza
Sanaei
Science and Technology Research Center, Tehran, I.R. IRAN
10.30492/ijcce.1998.10305
<em>In this study fungi isolated from the effluent of ethanol factories were identified. Optimal conditions for single cell protein (SCP) production and COD reduction of sugar beet stillage are specified for a species of Hansenula in a continuous culture. Under these conditions 5.7 g dm-3 biomass was produced and 31% of COD was reduced without addition of further nutrients to the beet molasses stillage. Adding nitrogen and phosphorus sources، increased the biomass production and COD reduction to 8.5 g dm-3 and 35.7%، respectively. The crude protein content of SCP in the absence and presence of additives was 39.6% and to 50.6% respectively. The amounts of essential amino acids measured were greater than that of the FAO standards reference and are comparable with some other food proteins، such as soya bean and fish meal.</em>
Single cell protein (SCP),Stillage,Yeast,Hansenula
https://ijcce.ac.ir/article_10305.html
https://ijcce.ac.ir/article_10305_f1bd6f0631e7f3474358fe4d795512ac.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
17
2
1998
12
01
A New Mixing Rule for Mixtures of Hard Spheres
81
88
EN
Mohsen
Mohsen Nia
Department of Chemical Engineering, Amir-Kabir University of technology, Tehran, I.R. IRAN
Hamid
Modarres
Department of Chemical Engineering, Amir-Kabir University of technology, Tehran, I.R. IRAN
Gholam Ali
Mansoori
Department of Chemical Engineering, University of Illinois at Chicago, USA
10.30492/ijcce.1998.10303
<em>A mixing rule for the mixtures of hard-spheres is presented which can be reduced to the standard van der Waals mixing rule at low densities. The effectiveness of the mixing rule for the size and energy parameters of lennard-Jones fluid are examined by combining them with an equation of state to calculate thermodynamic properties. The results of calculation are compared with the molecular dynamic simulation data and the superiority of the present mixing rule over the standard van der Waals mixing rule is demonstrated.</em>
Equation of state,Mixing rule,van der waals,Corresponding state theory
https://ijcce.ac.ir/article_10303.html
https://ijcce.ac.ir/article_10303_3cd7365adca3371f9c8bd1f37ef31e0e.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
17
2
1998
12
01
The Liquid Density of Complex Liquid Mixtures
89
93
EN
Mohammad Hossein
Keshavarz
Department of Chemistry, Malek Ashtar University of Technology, Zip code 83158, Isfahan, I.R. IRAN
Ali
Boushehri
Department of Chemistry, Shiraz University, Zip code 71454, Shiraz, I.R. IRAN
10.30492/ijcce.1998.10304
<em>A second virial coefficient correlation suitable for two different temperatures ranges, (T*)<sup>-2</sup></em><em>£</em><em>180 and (T*)<sup>-2</sup>>180, where T* is RT/</em><em>D</em><em>H<sub>vap</sub> is presented. The equation of state can be calculated for different, complicated non-polar, and slightly polar liquid mixtures at any temperature over the range from T<sub>tp</sub> to T<sub>c</sub> and up to high pressures. The latent heat of vaporization and density at the triple point are the only two parameters that are needed in these calculations. The results indicate that the liquid densities of liquid mixtures with quite different acentric factors can be predicted to within about 5%.</em>
Compressed liquids and mixtures,Equation of state,Density,Second Virial Coefficients,Statistical Mechanics
https://ijcce.ac.ir/article_10304.html
https://ijcce.ac.ir/article_10304_9e799262f2e66ccc1eb5d316fb12aca6.pdf