communications in catalysis
Volume:1 Issue: 1, Winter-Spring 2018

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

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

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

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

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

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