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Extraction of Monocyclic Aromatic Hydrocarbons From Petroleum Products Using Sulfolane as Industrial Solvent
أستخلاص الهيدروكاربونات الأروماتية ذات الحلقة الأحادية من المنتجات النفطية بأستخدام السلفولين كمذيب صناعي

Authors: Moayad abd al-Hassan مؤيد عبد الحسن --- Khalid F. Chasib Al-Jiboury خالد فرهود
Journal: Al-Khwarizmi Engineering Journal مجلة الخوارزمي الهندسية ISSN: 18181171 23120789 Year: 2010 Volume: 6 Issue: 3 Pages: 1-13
Publisher: Baghdad University جامعة بغداد

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Abstract

Liquid – liquid equilibria data were measured at 293.15 K for the pseudo ternary system (sulfolane + alkanol) + octane + toluene. It is observed that the selectivity of pure sulfolane increases with cosolvent methanol but decreases with increasing the chain length of hydrocarbon in 1-alkanol. The nonrandom two liquid (NRTL) model, UNIQUAC model and UNIFAC model were used to correlate the experimental data and to predict the phase composition of the systems studied. The calculation based on NRTL model gave a good representation of the experimental tie-line data for all systems studied. The agreement between the correlated and the experimental results was very good.

بيانات إتزان سائل – سائل قد تم قياسها عند درجة حرارة 293.15 كلفن للنظام الثلاثي الكاذب (pseudo ternary system) (سلفولين + الكانول) + اوكتان + تلوين. لقد تم ملاحظة ان الأنتقائية للسلفولين النقي تزداد مع المذيب المساعد (cosolvent) الميثانول ولكن تقل مع زيادة طول السلسلة(chain length) للهيدروكاربونات في المركب 1-الكانول. الموديل الرياضي لـ (The nonrandom two liquid (NRTL)) و الموديل الرياضي لـ (UNIQUAC)و الموديل الرياضي لـ (UNIFAC) قد تم استخدامهم لربطهم بعلاقات مع البيانات العملية و للتنبؤ بتراكيز الأطوار للانظمة المدروسة . الحسابات المبنية على الموديل الرياضي لـ (NRTL) تعطي تمثيل جيد للبيانات العملية (experimental tie-line data) لكل الأنظمة المدروسة. التوافق بين النتائج المستحصلة من العلاقات الرياضية والبيانات العملية كان جيداً جداً.


Article
Extraction of Aromatic Hydrocarbons from Lube Oil Using Different Co-Solvent

Authors: Ibtehal k. Shakir --- Muslim A. Qasim
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2015 Volume: 16 Issue: 1 Pages: 79-90
Publisher: Baghdad University جامعة بغداد

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Abstract

An investigation was conducted effect of addition co- solvent on solvent extraction process for two types of a lubricating oil fraction (spindle) and (SAE-30) obtained from vacuum distillation unit of lube oil plant of Daura Refinery. In this study two types of co-solvents ( formamide and N-methyl, 2, pyrrolidone) were blended with furfural to extract aromatic hydrocarbons which are the undesirable materials in raw lubricating oil, in order to improve the viscosity index, viscosity and yield of produced lubricating oil. The studied operating condition are extraction temperature range from 70 to 110 °C for formamide and 80 to 120 °C for N-methyl, 2, pyrrolidone, solvent to oil ratio range from 1:1 to 2:1 (wt./wt.) for furfural with formamide extraction and 1:1 to 3:1 (wt./wt.) for furfural with NMP extraction. The results of the investigation show that the viscosity index of lubricating oil fraction increases while viscosity and percentage yield of raffinate decreases with increasing extraction temperature, the solvent to oil ratio and co-solvent to furfural ratio. For formamide the best temperature were 90 °C, furfural to co-solvent ratio (60:40) and solvent to lube oil ratio (1.5:1) to get best value of viscosity index 102, viscosity 3.01 cst and 69.23 % yield. While for NMP co-solvent 110 °C extraction temperature, (2:1) solvent to lube oil ratio and (60:40) furfural to co-solvent ratio, to produce lube oil with 96 viscosity index, 9.10 cst viscosity and 68.50 yield.

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