ORIGINAL_ARTICLE
A new strategy to increase comonomer incorporation in LLDPE synthesis using Ziegler-Natta catalysts
Effect of FeCl3 and FeCl3/SiCl4-doping on the performance of MgCl2(ethoxide type)/TiCl4/TEAL catalytic system was evaluated in the linear low density polyethylene (LLDPE) synthesis using 1-hexene as the comonomer. Results revealed that FeCl3/SiCl4 modified catalytic system has better performance in terms of catalyst activity and comonomer incorporation when compared with unmodified catalyst or the catalytic system in the presence of FeCl3 alone. In fact, the introduction of FeCl3 doper, in its optimum amount of 10 wt. %, together with SiCl4 induced better catalytic performance with 212 and 90 % increase in catalyst activity and 1-hexene incorporation, respectively. Copolymers characterization showed increased bulk density together with decreased crystallinity and Tm in the polymers from modified catalysts. Overall results showed that, new catalytic system represented in this work, is a good candidate for large scale LLDPE production with high comonomer amount.
http://cic.azaruniv.ac.ir/article_13736_44050f0fcf8beef21bd7fb5da28ab778.pdf
2018-02-01
1
10
10.22049/cic.2018.13736
LLDPE
modified support
FeCl3
Ziegler-Natta catalyst
1-hexene
Reza
Bazvand
r.bazvand@ippi.ac.ir
1
Polymerization Engineering Department, Iran Polymer and Petrochemical Institute (IPPI)
AUTHOR
Naeimeh
Bahri-Laleh
n.bahri@ippi.ac.ir
2
Polymerization Engineering Department, Iran Polymer and Petrochemical Institute (IPPI), P.O. Box 14965/115, Tehran, Iran
LEAD_AUTHOR
Mehdi
Nekoomanesh
m.nekoomanesh@ipi.ac.ir
3
Polymerization Engineering Department, Iran Polymer and Petrochemical Institute (IPPI), P.O. Box 14965/115, Tehran, Iran
AUTHOR
Hossein
Abedini
h.abedini@ippi.ac.ir
4
Modeling and Control Department, Iran Polymer & Petrochemical Institute, P.O. Box 14965/115, Tehran, Iran.
AUTHOR
Ahad
Hanifpour
a.hanifpour@ippi.ac.ir
5
Polymerization Engineering Department, Iran Polymer and Petrochemical Institute (IPPI)
AUTHOR
ORIGINAL_ARTICLE
Synthesis of Neopenthylglycolesters using homogeneous and heterogeneous catalysts as synthetic lubricant base oils
The preparation of Neopenthylglycol (NPG) esters via esterification reaction of Neopenthylglycol by carboxylic acid in the presence of solid acidic catalysts has been investigated. The used catalysts were natural zeolite, acidic ion exchange resin catalyst (polyestyren divinyl benzensulfated), synthetic zeolites (ZEOKAR-2, ASHNCH-3), heteropolyacid H4Si (W3O10)4 , and sulfated metal oxide ZrO2 .The reactions were carried out under solvent-less conditions. It was observed that sulfated ZrO2 has higher reactivity and efficiency among the investigated catalysts. For this purpose esterification of ethylenglycol, trimethylolpropan using sulfated ZrO2 by carboxylic acids has been nvestigated.
http://cic.azaruniv.ac.ir/article_13722_bca153c832bc75b6b3b7678655b4638e.pdf
2018-02-01
11
19
10.22049/cic.2018.13722
: Esterification
Solid catalyst
Zeolite
Sulfated zirconia
NPG
Hadi
Jabbari
hadijabbari@yahoo.com
1
pnu university
LEAD_AUTHOR
ORIGINAL_ARTICLE
Using Of Ozonation Method for Filtertion Of Mineral Water
In this reseach, two samples of mineral water found in Northern Mahabad, west Azarbaigan, with hardnesses of 36, 42 mg/l (CaCO3) are investigated (.Kanisepi South Region, and Minerals of the Tutankhach Village Northern Region). Then, different amount of Ozone gas is injected into mineral water and biological and chemical changes are observed. The used Ozonator can produce 25 mg Ozone per hour. To determine the amount of Ozone gas. We used iodometry method. By injection of 1.25 mg/l we achieved complete removal of diatomaceae in sample 1 and up to 99 percent in sample 2. Both complete removal of chlorophyceae in 1.1 mg/l complete removal of BOD 5 sample 1 in 1.1 mg/l Ozone and in sample (2 in 1 mg/l Ozone complete removal).We had 65 percent reduction of COD by injection of 1.2 mg Ozone for sample 1 and 68 percent for sample 2.Complete disinfection is done in both samples by injection 0.5 mg per liter. In this method clean water is chieved because no chemical is used and we don’t need to provide chemicals. So, Ozonation can be introducd as the best method for filtration of water. DO: Dissolved Oxygen BOD: Biological Oxygen Demand COD: Chemical Oxygen Demand.
http://cic.azaruniv.ac.ir/article_13718_dd487987004408a9416807e1aaec6531.pdf
2018-02-01
20
31
10.22049/cic.2018.13718
Ozonation
Filtration
Disinfection
Mineral water
Clean water
Hassan
Ghian
hassan.zhian@gmail.com
1
YRMIA UNIVERSITY
AUTHOR
Nader
Noroozi
nnp304@gmail.com
2
URMIA UNIVERSITY
AUTHOR
Hadi
Jabbari
hadijabbari@yahoo.com
3
pnu university
LEAD_AUTHOR
ORIGINAL_ARTICLE
Preparation nanostructured materials by sol–gel crosslinking process in present N, N-dimethyl amino pyridinium ionic liquid as a catalysis
Silica porous materials with use of the some of ionic liquids (ILs) based N, N-dimethyl aminopyridinium cation (DMAP) with high thermal stability was prepared.First according to a proper sol-gel method, various RTILs with anions such as= Br, BF4 as a new kind of recyclable templates in present of trimethoxy silane (TMOS) as the sol-gel precursor and deionized water were employed. Then ILs was removed from the silica matrix by calcination method. The resulting gels were characterized by using thermogravimetric analysis, infrared spectroscopy. The calcined gels were analyzed using scanning electron microscopy and X-ray diffraction. In the continuous, reaction was fallowed under acidic conditions at temperature above the melting point of the functi onal IL such as; 2–ethoxyethyl-4-(N,N-dimethyl amino) pyridinum tetrafluoroborate with larger hydrophilic polar region in a so-called nanocasting sol-gel technique, those silica nanostructured materials with highly ordered monolithic was obtained.
http://cic.azaruniv.ac.ir/article_13719_93009e1030cb6ddcaf4dfa84226ba211.pdf
2018-02-01
32
42
10.22049/cic.2018.13719
Sol-Gel process
N,N-dimethyl amino pyridinium ionic liquid
Nanostructured material
Silica
Ionogel
Hanie
Musazade
hanie_musazade@yahoo.com
1
Tabriz University Chemistry Faculty Organic Chemistry
LEAD_AUTHOR
ORIGINAL_ARTICLE
Density functional theory study of the adsorption of toxic large molecules on nitrogen modified TiO2 anatase nanoparticles
First principles calculations were performed to study the adsorption behaviors of large organic molecules on the pristine and N-doped TiO2 anatase articles. Both oxygen and nitrogen in the molecule can react with the TiO2 nanoparticle strongly. Thus, the binding sites were located on the oxygen or nitrogen atom of the molecule, while on the TiO2 nanoparticle the binding site occurs on the five folld coordinated titanium atoms. It was found that the adsorption on the N-doped TiO2 is more favorable in energy than the adsorption on the undoped one, indicating the high sensitivity of N-doped TiO2 nanoparticles towards molecule molecules. It means a dominant effect of nitrogen doping on the adsorption properties of pristine TiO2. The large overlaps in the PDOS spectra of the oxygen and nitrogen atoms of the molecule and titanium atom of TiO2 represent a forming Ti-O and Ti-N bonds between them.
http://cic.azaruniv.ac.ir/article_13720_9ef92095d01ec1c192f82382badf2b54.pdf
2018-02-01
43
57
10.22049/cic.2018.13720
Molecule
TiO2 nanoparticle
Electronic properties
Density functional theory
Amirali
Abbasi
a_abbasi@azaruniv.edu
1
Department of chemistry, Azarbaijan Shahid Madani University
LEAD_AUTHOR
Jaber
Jahanbin Sardroodi
jsardroodi@azaruniv.edu
2
Department of Chemistry, Azarbaijan Shahid Madani University
AUTHOR
ORIGINAL_ARTICLE
Synthesis and characterization of novel micro-sized tetrazole-based high energetic nitrogen-rich polymers
Energetic materials are a class of material with high amount of stored chemical energy that can be released. Typical classes of energetic materials are e.g. explosives, pyrotechnic compositions, propellants (e.g. smokeless gun powders and rocket fuels), and fuels (e.g. diesel fuel and gasoline). The novel functionality of aromatic tetrazole derivatives with high nitrogen content predetermines a great interest to tetrazole-containing polymers. The tetrazole-based nitrogen-rich polymers were well investigated. The tetrazole rings play an important role in development of energetic polymers. The high thermal stability of these rings causes the polymers as good candidates as energetic applications. The aim of the present work is to synthesize novel nano-sized high energy density polymers based on tetrazole rings. The resulted polymer was characterized by SEM, 1H NMR and 13C NMR
http://cic.azaruniv.ac.ir/article_13721_782629c04e171006ce880915a67a1e70.pdf
2018-02-01
58
66
10.22049/cic.2018.13721
Nano-size
Tetrazole
Nitrogen-rich polymers
Explosives
Energetic materials
Ebrahim
Rezaii
ebrahimrezayii@gmail.com
1
Chemistry Department, Faculty of Science, Azarbaijan Shahid Madani University, Tabriz, Iran
LEAD_AUTHOR
Mehrdad
Mahkam
mmahkam@yahoo.com
2
Azarbaijan Shahid Madani University
AUTHOR
leila
nazmi
nazmi.leila@yahoo.com
3
Azarbaijan Shahid Madani University, Tabriz, Iran
AUTHOR
Roghayyeh
Fathi
roghayyehfathi@gmail.com
4
Chemistry Department, Faculty of Science, Azarbaijan Shahid Madani University, Tabriz, Iran
AUTHOR
Shabnam Jah
anbani-Korabbaslo
shabnamjahanbani-korabbaslo@gmail.com
5
Chemistry Department, Faculty of Science, Azarbaijan Shahid Madani University, Tabriz, Iran
AUTHOR