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Article
Separation of Hexane-Benzene Mixtures by Emulsion Liquid Membrane.

Authors: Muhammad D. Al Zaidi --- Adil A. Al Hemiri عادل احمد عوض
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2008 Volume: 9 Issue: 4 Pages: 1-6
Publisher: Baghdad University جامعة بغداد

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Abstract

The effect of operating parameters on the batch scale separation of hydrocarbon mixture (benzene and hexane) usingemulsion liquid membrane technique is reported. Sparkleen detergent was used as surfactant and heavy mineral oil assolvent to receive the permeates.From the experimental results, the parameters that influenced the permeation are, composition of feed, contact timewith solvent, ratio of volume of solvent to volume of hydrocarbon feed, ratio of volume of surfactant solution to volumeof hydrocarbon feed, surfactant concentration, mixing intensity and glycerol as polar additive in the surfactant solutionto eliminate drop breakup.The best conditions for the separation in this study were found to be: composition of feed (mole fraction ofbenzene=0.5245), contact time of 10min. , ratio of volumes of solvent to feed equal 3.5 , ratio of volumes of surfactantsolution to feed of 0.4, surfactant concentration of 1wt%, mixing intensity equal 1000rpm and 70% by weight of polaradditive. These conditions gave a separation factor of (8.0).


Article
Minimization of Toxic Ions in Waste Water Using Emulsion Liquid Membrane Technique

Authors: Heaven E. Mahmoud --- Adel A. Al - Hemiri عادل احمد عوض
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2010 Volume: 11 Issue: 1 Pages: 11-19
Publisher: Baghdad University جامعة بغداد

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Abstract

In the present study, the removal of zinc from synthetic waste water using emulsion liquid membrane extraction technique was investigated. Synthetic surfactant solution is used as the emulsifying agent. Diphenylthiocarbazon (ditizone) was used as the extracting agent dissolved in carbon tetrachloride as the organic solvent and sulfuric acid is used as the stripping agent. The parameters that influence the extraction percentage of Zn+2 were studied. These are the ratio of volume of organic solvent to volume of aqueous feed (0.5-4), ratio of volume of surfactant solution to volume of aqueous feed (0.2-1.6), pH of the aqueous feed solution (5-10), mixing intensity (100-1000) rpm, concentration of extracting agent (20-400) ppm, surfactant concentration (0.2-2) wt.%, contact time (3-30) min, and concentration of strip phase (0.25-2) M . It was found that 87.4% of Zn+2 can be removed from the aqueous feed solution at the optimum operating conditions. Further studies were carried out on extraction percentages of other toxic metal ions (As+3, Hg+2, Pb+2, Cd+2) by using the same optimum conditions which were obtained for zinc ions except for the pH of the feed solutions. The pH values for best extraction percentages of arsenic, lead, and cadmium were (1, 10, 10) respectively. Maximum extraction percentage of (98.5, 95.5 and 93.8) was obtained for arsenic, lead, and cadmium respectively, while mercury was completely removed from the aqueous feed solution within the acidic pH range.


Article
Demulsification of Remaining Waste (Water In Oil Emulsions) After Removal Of Phenol In Emulsion Liquid Membrane Process
كسر الاستحلاب للمخلفات المتبقيه (مستحلبات الماء في النفط) بعد إزالة الفينول بعملية الغشاء السائل المستحلب

Authors: Najwa Saber Majeed نجوى صابر مجيد --- Manal Adnan Mohammed منال عدنان محمد
Journal: Journal of Engineering مجلة الهندسة ISSN: 17264073 25203339 Year: 2016 Volume: 22 Issue: 9 Pages: 83-102
Publisher: Baghdad University جامعة بغداد

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Abstract

The aim of present work is to study the removal of phenol present in aqueous feed solution by the emulsion liquid membrane technique using kerosene as a diluent, sodium hydroxide as a stripping agent, and sorbitan monooleate (Span 80) as a surfactant. The parameters studied were: surfactant concentration, volume ratio of membrane phase to internal phase, and stirring speed. It was found that more than 98% of phenol can be removed at the conditions were surfactant concentration 2% (v/v), volume ratio of membrane phase to internal phase 5:1 and stirring speed 400 rpm. Maximum phenol extraction efficiency at 7 minutes of process time was observed. It was found that there was a good agreement between the standard kerosene and the upper layer that resulted after the demulsification of the remaining waste by applying centrifuge. Thus, it is possible to reuse this layer to prepare a new emulsion of the membrane phase.

الهدف من هذا العمل هو دراسة إزالة الفينول من المحاليل المائية باستخدام تقنية الغشاء السائل المستحلب بواسطة استخدام الكيروسين كمخفف، هيدروكسيد الصوديوم كعامل انتزاع و (Span 80) كمادة منشطة للسطوح. تم دراسة العوامل وهي: تركيز المادة المنشطة للسطوح, النسبة الحجمية لمرحلة الغشاء إلى المرحلة الداخلية، و سرعة التحريك. وقد وجد أن أكثر من 98٪ من الفينول يمكن ازالته عند الظروف وهي تركيز للمادة المنشطة للسطوح 2٪ (حجم / حجم)، النسبة الحجمية لمرحلة الغشاء إلى المرحلة الداخلية 5:1 , و سرعة التحريك 400 دورة في الدقيقة. و لوحظ ان أقصى كفاءة لاستخراج الفينول في 7 دقائق من وقت العملية. و وجد أن هناك توافق جيد بين الكيروسين القياسي والطبقة العليا الناتجه بعد عملية كسر الاستحلاب للمخلفات المتبقية من خلال تطبيق جهاز الطرد المركزي. وبالتالي, فإنه من الممكن إعادة استخدام هذه الطبقة لتحضير مستحلب جديد لمرحلة الغشاء.

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