Nickel and Vanadyl Porphyrins on Arabian Heavy Crude Oil

الموضوعات

علوم بحتة وطبيعية

الملخص

This study reports the isolation and characterization of nickel and vanadyl porphyrins in the residue (1000??F) and asphaltenes from Arabian Heavy crude oil. The residue was obtained by distillation of crude oil, where as the asphaltenes were precipitated by n-haptene from the crude oil. Several literature-reported methods and modified separation methods were tried to isolate the nickel and vanadyl porphyrins from the residue and the asphaltenes. Metalloporphyrins were first extracted from the residue with methanol. The nickel porphyrins were separated from vanadyl porphyrins by means of adsorption chromatography on silica gel and alumina using solvents of increasing polarity. The metalloporphyrins were first soxhlet extracted from the asphaltenes by different proportions of benzene in acetonitrile. Adsorption chromatography on silica gel and alumina, using solvents of increasing polarity, was used to separate the vanadyl porphyrins. No nickel porphyrins were detected in the asphaltenes. The chromatographic separation process was monitored by ultra violet/visible spectrophtometry. Both of the nickel and vanadyl porphyrins were identified and characterized by ultraviolet/visible spectrophotometry and mass spectrometry. Five types of homologous series of vanadyl porphyrins were identified in the residue and asphaltenes: deoxophylleoery throetrioporphyrins (DPEP, etioporphyrins (Etio), benzoDPEP, benzoEtio, and tetrahydroDPEP. Only two types of homologous series of nickel porphyrins were found in the residue: Etio and benzo DPEP.

روابط وملفات

التعريف والنوع

رقم الوثيقة

03b15f07-8468-45d4-a6f1-fab8c2334756

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

944196_1.pdf

بيانات النشر

ترجمة العنوان

بورفيرينات النيكل والفانديل في الزيت العربي الثقيل

ألقاب المؤلفين

[{"name_ar":"F. M. Ali ","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"عدنان أحمد الحاجي","title_ar":"اعداد","title_en":"Preparation"}]

اللغة

English

المصدر والدورية

اسم المصدر

Nickel and Vanadyl Porphyrins on Arabian Heavy Crude Oil

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

F. M. Ali

الإعداد

عدنان أحمد الحاجي

الاقتباسات الببليوغرافية