دانلود رایگان مقاله انگلیسی جداسازی اتیل بنزن و پارا-زایلین با استفاده از تقطیر عصاره ای پارا-دی نیتروبنزن - الزویر 2019

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عنوان فارسی

جداسازی اتیل بنزن و پارا-زایلین با استفاده از تقطیر عصاره ای پارا-دی نیتروبنزن

عنوان انگلیسی

Separation of ethylbenzene and p-xylene using extractive distillation with pdinitrobenzene

صفحات مقاله فارسی

0

صفحات مقاله انگلیسی

5

سال انتشار

2019

نشریه

الزویر - Elsevier

فرمت مقاله انگلیسی

PDF

نوع مقاله

ISI

نوع نگارش

مقالات پژوهشی (تحقیقاتی)

رفرنس

دارد

پایگاه

اسکوپوس

کد محصول

E9426

رشته های مرتبط با این مقاله

شیمی

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شیمی تجزیه

مجله

فناوری جداسازی و تصفیه - Separation and Purification Technology

دانشگاه

Dept. of Chemical Engineering - Dong-A University - Busan - Republic of Korea

کلمات کلیدی

جداسازی p-Xylene، تقطیر عصاره ای، شبیه سازی مولکولی

doi یا شناسه دیجیتال

https://doi.org/10.1016/j.seppur.2018.07.004

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چکیده

ABSTRACT

Though p-xylene derived from naphtha reformate is in high demand as a raw material in the production of polyesters and polyethylene terephthalates, its separation from the FCC reformate is not easy due to close boiling points among the components in the reformate. When a proper solvent for the p-xylene separation is available, an extractive distillation can be applied in the separation. Currently the separation utilizes an adsorption process requiring a large amount of costly adsorbent and a desorption process followed by distillation. In the proposed extractive distillation here, p-dinitrobenzene has been utilized to improve the separation of p-xylene from its ethylbenzene mixture. The VLE data of the ternary mixture estimated with the UNIFAC were compared to those computed from molecular simulation to show their reliability. An extractive distillation and solvent recovery were applied to obtain 99.6% purity p-xylene with 99.1% recovery. The economics of the proposed process demonstrates its comparability to the existing Parex process.

نتیجه گیری

6. Conclusions

An extractive distillation process for the separation of ethylbenzene and p-xylene was developed, and its design procedure was presented here. The solvent used in the process has similar structure of p-xylene with higher boiling point. The molecular simulation in the ternary system of ethylbenzene/p-xylene/p-dinitrobenzene indicates that the solvent improves the separation factor between ethylbenzene and pxylene. The design results of the extractive distillation and solvent recovery columns are presented, and the economics of the proposed process was briefly compared to that of the Parex process. The process design demonstrated the feasibility of distillation separation of ethylbenzene and p-xylene with 99.1% recovery and 99.6% purity of p-xylene. The economic evaluation also exhibits the distillation process is comparable to the adsorption process, a current commercial process. The VLE computation in a ternary system using the molecular simulation was applied to the examination of the NRTL thermodynamic model for the ternary system.

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