اثر حلال اوتکتیک عمیق کولین کلراید/ N- فرمیل مورفولین روی استخراج مایع– مایع بنزن/ تیوفن از نرمال هگزان

نوع مقاله: مقاله پژوهشی

نویسندگان

گروه شیمی فیزیک، دانشکده شیمی، دانشگاه تبریز، ایران

10.22078/pr.2019.3498.2595

چکیده

استخراج آروماتیک‌ها از بسترهای آلیفاتیکی در مواقعی که دو ماده تشکیل آزئوتروپ می‌دهند از معضلات صنایع پالایشگاهی و پتروشیمی است. در این مطالعه سعی شده تا مشخصات تعادل مایع- مایع برای استخراج بنزن و تیوفن از هگزان نرمال با کمک حلال آلی N- فرمیل مورفولین و حلال ترکیب اوتکتیک عمیق (DES) آن با کولین کلراید در دماهای 15/298 تا 15/308 و فشار atm 1 مورد بررسی قرار گیرد. اثر دما و ترکیب درصد (آروماتیک/ آلیفاتیک/ DES یا NFM) بر روی راندامان استخراج و گزینش‌پذیری بررسی شد. با استفاده از داده‌های تجربی، مدل‌های ترمودینامیکی NRTL و UNIQUAC جهت صحه‌گذاری نتایج تجربی فرآیند استخراج آروماتیک- آلیفاتیک و رسم دیاگرام فازی مورد استفاده قرار گرفتند. نتایج حاصله نشان‌دهنده توانایی DES مورد مطالعه جهت کار در دمای محیط و حتی پایین‌تر از نقاط ذوب هر یک از ترکیبات خالص است. همچنین نتایج LLE نشان می‌دهند در حین فرآیند استخراج با استفاده از حلال N- فرمیل مورفولین، قسمتی از این حلال به‌صورت ناخالصی وارد فاز هیدروکربنی می‌گردد که در صورت تبدیل این حلال به ترکیب اوتکتیک، این مشکل برطرف خواهد شد.
 

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Deep Eutectic Solvent (Choline Chloride / N-formyl Morpholine) Effect on Liquid-liquid Extraction of Benzene / Thiophene from n-hexane

نویسندگان [English]

  • Hemayat Shekaari
  • Mohammed Taghi Zafarani-Moattar
  • Behrouz Mohammadi
Department of Physical Chemistry, Faculty of Chemistry, University of Tabriz , Iran.
چکیده [English]

The extraction of aromatics from aliphatics mixtures when they create an azeotropic media is a challenge for refinery and petrochemical industries. In this study, we have used liquid – liquid equilibria have been used to extract benzene or thiophene from n-hexane by N-formyl morpholine, and its deep eutectic solvents (DESs) with choline chloride at T = (298.15 to 318.15) K and atmospheric pressure have been investigated. The effects of temperature and mixing ration of aromatic / aliphatic/ NFM or DES on the distribution coefficients (β) and selectivity (S) factors have been studied. The NRTL and UNIQUAC thermodynamic models have been used to correlate experimental LLE data. The obtained interaction parameters have been used to plot the phase equilibria of the studied systems. The obtained results show the potential of studied DESs for usage in ambient conditions and below than their pure consistent melting points. Finally, the LLE results indicate that in the extraction with NFM, some solvent impurities are entered into the hydrocarbon phase which in the case of its DESs form, this problem is removed.
 

کلیدواژه‌ها [English]

  • Liquid – liquid Extraction
  • Thermodynamics Model
  • Selectivity
  • N-formylmorpholine

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