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Jafar Mahmoudi,Mohammad Nader Lotfollahi,Ali Haghighi Asl 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.24 No.-
Benzene reduction in gasoline was investigated with propylene over synthesized mesoporous H-Al- MCM-41 with Si/Al = 15, 29 and 42 as catalysts in order to produce more environmental friendly gasoline. The resulting catalysts were characterized by XRF, XRD, FTIR, TGA, BET and TPD-NH3 techniques. The results of alkylation of C6-cut obtained from gasoline indicated that the synthesized mesoporous H-AL-MCM-41 with Si/Al = 15 is the most active catalyst among the synthesized catalysts due to high crystallinity, favorable textural properties and large bronsted acidity. The higher conversion of benzene (47.88%) was observed over H-Al-MCM-41 with Si/Al = 15 at B/P = 1 and T = 200 8C.
Liquid+liquid equilibria of ternary water+carboxylic acid+solvent systems at 288.15K
Abbasali Arabi,Jafar Mahmoudi,Hamid Saradar,Ahmad Jafarzade,Mahdiyar Ghasemi 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.3
The experimental liquid-liquid equilibrium (LLE) data for six ternary systems containing (chloroform+propionic acid+water), (chloroform+acetic acid+water), (diethyl ether+propionic acid+water), (diethyl ether+acetic acid+water), (trichloroethylene+propionic acid+water) and (trichloroethylene+acetic acid+water) were measured at 288.15 K and at atmospheric pressure. An accurate and simple titration method was used for determining of the concentration of carboxylic acid in the both liquid phases at equilibrium. The reliability of the experimental tie-line data was confirmed by using the Othmer-Tobias correlation. The distribution coefficients and selectivity factors were presented to evaluate the efficiency of the solvents for extraction of carboxylic acid from water. The results show that chloroform and diethyl ether are satisfactory solvents for extraction of carboxylic acids from water. Trichloroethylene separates propionic acid from water; however, it cannot be used as a solvent for separation of acetic acid.
Mohammad Nader Lotfollahi,Jafar Mahmoudi 한국화학공학회 2010 Korean Journal of Chemical Engineering Vol.27 No.1
The extraction of benzene from a narrow cut of naphtha produced by the Iranian petrochemical company has been studied at the operating temperatures of 40, 45 and 50 oC, and four solvent-to-feed ratios (S/F) varied over the range of 1-4. Two extraction solvents, sulfolane as a pure-solvent and (sulfolane containing 7 wt% 2-propanol) as a mixed-solvent have been investigated for selective removal of benzene from the naphtha cut. The experimental results demonstrated that the mixed-solvent at 40 oC is a suitable solvent to replace sulfolane for an industrial extraction process for the separation of benzene from the naphtha cut because of its lower price and energy savings.