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Eşfahān, Iran

Semnani A.,Shahrekord University | Shakoori Langeroodi H.,Petrokimia Sepahan Company
Petroleum Science and Technology

Heavy alkyl benzene (HAB) is a byproduct in the process of linear alkyl benzene (LAB) production. It is used as heat transfer oil and lubricating greases. In this article the potential of the usage of HAB in the formulation of gasoline and diesel engine oils as well as hydraulic fluid is indicated. With the aim of passing 5W30, 5W40, 10W40, and 15W40 standards, different engine oils have been formulated. The formulations contain various amounts of HAB as minor component, and miscellaneous quantities of solvent neutral 100 (SN-100), SN-150, and SN-650 as major component. The measurement of typical properties of obtained oils indicates that some of them do have the intended criteria. Test field of the recent oils designate that they have good performance. In the next step, different blends of HAB as major component and polyisobutene (PIB) as minor component have successfully been employed in the formulation of several ISO grade hydraulic fluids. The achieved materials do have suitable air release and demulsibility. Copyright © Taylor & Francis Group, LLC. Source

Ghasemizadeh A.,Islamic Azad University | Semnani A.,Shahrekord University | Langeroodi H.S.,Petrokimia Sepahan Company | Ejhieh A.N.,Islamic Azad University

Several semisynthetic engine oils containing solvent neutral-150 (SN-150) and solvent neutral-500 (SN-500) as mineral constituent and di-2-ethyl-hexylphthalate (DOP) as synthetic constituent has been formulated. Physical properties of the prepared oils have been measured by standard methods. The concentration of twenty three elements in the oils has also been determined by Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES). The physical measurements and chemical analysis were repeated after 5000 kilometer of running. By comparison of the obtained data, the influence of ester on initial properties of fresh formulated oils, as well as its impact on the field performance of used ones have been investigated. The result indicate that upon ester introduction properties such as biodegradability, coefficient of friction, wear, suppression of additive depletion, CCS, color, and pour point will be modified. However, specifications such as oxidation stability and hydrolytic stabilities will be downgraded. The overall obtained data indicate that, upon 20% increase of DOP content most of the useful properties of ester will be gained. Source

Shakoori Langeroodi H.,Petrokimia Sepahan Company | Semnani A.,Shahrekord University
Petroleum Science and Technology

By processing of a low sulfur waxy content from isomax unit of Isfahan refinery plant, a Group (III) base oil was obtained. Several blends of the recent oil and polyisobutene in which the weight percentages of polymer varied from 5 to 34 were made. Lubrication properties of each the blends were then measured. The prepared blends were applied for the equalization of several well-known industrial oils, in the next step. The performance of each of the formulated oils were followed and compared with equalized ones. The advantages and disadvantages of formulated relative to equalized oils were discussed. © 2013 Taylor and Francis Group, LLC. Source

Semnani A.,Shahrekord University | Langeroodi H.S.,Petrokimia Sepahan Company
Petroleum Science and Technology

Several mixtures of SN 500 and polyisobutene in which the weight percentages of polyisobutene varied from 0 to 20 were made. The important lubrication properties of the recent blends were then followed by standard methods. The results indicate systematic increase in viscosities at 40 and 100°C, as well as viscosity index, flash point, and specific gravity. In the case of pour point, sulfur content, color, and total acid number the reverse trend was observed. The lubrication properties of 83:17 showed good accordance with corresponding properties due to Bright stock 150. In addition the mixture showed the advantages of lower sulfur content as well as higher viscosity index and aniline point. Equalization of gear oil Esso GX from Esso Company and hydraulic oil Shell Tellus T32 from Shell Company by 83:17 mixture was successful. © 2013 Copyright Taylor and Francis Group, LLC. Source

Ashraafi J.,Shahrekord University | Semnani A.,Shahrekord University | Shakoori Langeroodi H.,Petrokimia Sepahan Company
Petroleum Science and Technology

The lubrication behavior of two series of binary blends containing S-4: PAO-100 or S-4: PIB have been followed. Each series contains 5%, 10%, 15%, 20%, and 25% of PAO-100 or PIB. The results indicate that upon addition of PAO-100, viscosities, viscosity index, and flash point increase in a linear fashion. Meanwhile, pour point, TAN, and specific gravity remain constant. In the case of PIB, viscosities increase in an exponential manner, viscosity index increases then remains constant, flash point drops, and then leftovers remain constant. Other properties do not change considerably. The rheological properties of 15% and 25% blends of S-4: PAO-100 blends are similar to S-6 and S-8, respectively. Similar conditions exist for 5% and 10% of S-4: PIB blends. A motor oil which has been formulated by 15% S-4: PAO blend and a hydraulic oil which has been formulated by 5% S-4: PIB blend have shown good performance characteristics. © 2013 Copyright Taylor and Francis Group, LLC. Source

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