Iraqi Journal of Chemical and Petroleum Engineering

Aluminum alloy 5052 had been anodized by sulfuric acid as an electrolyte under constant voltage and the anodic oxide
film produce will be testing by potentiostatic anodic polarization .Two variables, which were considered as important
variables, were studied. These variables are anodizing time 15,30 min. and sealing time 10,20 min., and the test by
potentiostatic anodic polarization through electro chemical polarization measurements in solutions of 1N na2so4 ( PH=
1 ). The results are discussed in light of the rate of ionic current flow through the coating during anodic polarization
measurements

Phenol oxidation by Fenton's reagent (H2O2 + Fe+2) in aqueous solution has been studied for the purpose of learning
more about the reactions involved and the extent of the oxidation process, under various operating conditions. An initial
phenol concentration of 100 mg/L was used as representative of a phenolic industrial wastewater. Working temperature
of 25C was tested, and initial pH was set at 5.6 . The H2O2 and the Fe+2 doses were varied in the range of
(H2O2/Fe+2/phenol = 3/0.25/1 to 5/0.5/1). Keeping the stirring speed of 200 rpm.
The results exhibit that the highest phenol conversion (100%) was obtained under (H2O/Fe+2/phenol ratio of 5/0.5/1)
at about 180 min. The study has indicated that Fenton's oxidation is first order with respect to the phenol concentration
and the rate constant K, was found to be 0.0325s-1 .

In this study two types of extraction solvents were used to extract the undesirable polyaromatics, the first solvent was
furfural which was used today in the Iraqi refineries and the second was NMP (N-methyl-2-pyrrolidone).
The studied effecting variables of extraction are extraction temperature ranged from 70 to 110°C and solvent to oil ratio
in the range from 1:1 to 4:1.
The results of this investigation show that the viscosity index of mixed-medium lubricating oil fraction increases with
increasing extraction temperature and reaches 107.82 for NMP extraction at extraction temperature 110°C and solvent
to oil ratio 4:1, while the viscosity index reaches to 101 for furfural extraction at the same extraction temperature and
same solvent to oil ratio. The increase in solvent to oil ratio has a higher effect on increasing the viscosity index of
lubricating oil fraction compared with extraction temperature in furfural and NMP extraction.
Further more, the results show that the percentage yield of raffinate was decreased as the extraction temperature and
solvent to oil ratio increases for furfural and NMP extraction.

This investigation was carried out to study the treatment and recycling of wastewater in the Battery industry for an
effluent containing lead ion. The reuse of such effluent can only be made possible by appropriate treatment method such
as electro coagulation.
The electrochemical process, which uses a cell comprised aluminum electrode as anode and stainless steel electrode as
cathode was applied to simulated wastewater containing lead ion in concentration 30 – 120 mg/l, at different
operational conditions such as current density 0.4-1.2 mA/cm2, pH 6 -10 , and time 10 - 180 minute.
The results showed that the best operating conditions for complete lead removal (100%) at maximum concentration 120
mg/l was found to be 1.2 mA/cm2 current density, in alkaline media pH = 10 , and at 120 minute.

The extraction of iron from aqueous chloride media in presence of aluminum was studied at different kinds of
extractants(cyclohexanone, tributyl phosphate, diethyl ketone), different values of normality (pH of the feed solution),
agitation time, agitation speed, operating temperature, phase ratio (O/A), iron concentration in the feed, and extractant
concentration]. The stripping of iron from organic solutions was also studied at different values of normality (pH of the
strip solution) and phase ratio (A/O). Atomic absorption spectrophotometer was used to measure the concentration of
iron and aluminum in the aqueous phase throughout the experiments

A common field development task is the object of the present research by specifying the best location of new horizontal
re-entry wells within AB unit of South Rumaila Oil Field. One of the key parameters in the success of a new well is the
well location in the reservoir, especially when there are several wells are planned to be drilled from the existing wells.
This paper demonstrates an application of neural network with reservoir simulation technique as decision tool. A fully
trained predictive artificial feed forward neural network (FFNNW) with efficient selection of horizontal re-entry wells
location in AB unit has been carried out with maintaining a reasonable accuracy. Sets of available input data were
collected from the exploited grids and used in the training and testing of the used network.
A comparison between the calculated and observed cumulative oil production has been carried out through the testing
steps of the constructed ANN, an absolute average percentage error of the used network was reached to 4.044%, and
this is consider to be an acceptable limit within engineering applications, in addition to that, a good behavior was
reached with (FFNNW) and suitable re-entry wells location were identified according to the reservoir configuration
(pressure and saturation distribution) output from SRF simulation model at the end of 2005

Phosphorus is usually the limiting nutrient for eutrophication in inland receiving waters; therefore, phosphorus
concentrations must be controlled. In the present study, a series of jar test was conducted to evaluate the optimum pH,
dosage and performance parameters for coagulants alum and calcium chloride. Phosphorus removal by alum was found
to be highly pH dependent with an optimum pH of 5.7-6. At this pH an alum dosage of 80 mg/l removed 83 % of the total
phosphorus. Better removal was achieved when the solution was buffered at pH = 6. Phosphorus removal was not
affected by varying the slow mixing period; this is due to the fact that the reaction is relatively fast.
The dosage of calcium chloride and pH of solution play an important role in phosphorus removal. The removal
efficiency increases with increasing pH, and the optimum dosage of CaCl2 was 60 mg/l. Alum demonstrated much better
results in phosphorus removal than CaCl2.