Liquid-liquid equilibria for the extraction of aromatics from naphtha reformate by dimethylformamide ethylene glycol mixed solvent

被引：25

作者：

Radwan, GM ^{[1
]}

AlMuhtaseb, SA ^{[1
]}

Fahim, MA ^{[1
]}

机构：

[1] UNITED ARAB EMIRATES UNIV,DEPT CHEM & PETR ENGN,AL AIN,U ARAB EMIRATES

来源：

FLUID PHASE EQUILIBRIA | 1997年 / 129卷 / 1-2期

关键词：

liquid-liquid equilibria; activity coefficient; aromatics; naphtha reformate; dimethyl formamide (DMF); ethylene glycol (EG); UNIFAC;

D O I：

10.1016/S0378-3812(96)03179-2

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The phase equilibria for the extraction of aromatics from naphtha reformate (b.p. 60-135 degrees C) in a mixed solvent of dimethylformamide (DMF) and ethylene glycol (EG) have been correlated using the UNIFAC group contribution model. The interaction parameters of DMF and EG with different hydrocarbon groups present in the reformate, such as CH2 (paraffinic CH2), ACH (aromatic CH) and ACCH(2) (aromatic CCH2), and each of the two solvents were fitted to experimental concentrations of ternary systems containing these groups. The extraction runs were carried out at different temperatures, solvent compositions and solvent-to-feed ratios. The experimental results compared favorably with those predicted from the UNIFAC method. The minimum required energy for separation was achieved at 57 degrees C using a 44% EG solvent with a solvent-to-feed ratio of 2.2 on a volume basis. (C) 1997 Elsevier Science B.V.

引用

页码：175 / 186

页数：12

共 7 条

[1]

ETHIRAJULU K, 1987, CHEM AGE INDIA, V38, P45

[2] PREDICTION OF OPTIMUM COMPOSITION OF THE MIXED-SOLVENT N-METHYLPYRROLIDONE ETHYLENE-GLYCOL FOR THE EXTRACTION OF AROMATICS [J].

FAHIM, MA ;

ELKILANI, AS .

SEPARATION SCIENCE AND TECHNOLOGY, 1990, 25 (13-15) :1803-1815

[3] COMPUTERIZED DESIGN OF MULTICOMPONENT DISTILLATION-COLUMNS USING UNIFAC GROUP CONTRIBUTION METHOD FOR CALCULATION OF ACTIVITY-COEFFICIENTS [J].

FREDENSLUND, A ;

GMEHLING, J ;

MICHELSEN, ML ;

RASMUSSEN, P ;

PRAUSNITZ, JM .

INDUSTRIAL & ENGINEERING CHEMISTRY PROCESS DESIGN AND DEVELOPMENT, 1977, 16 (04) :450-462

[4]

Henley EJ, 1981, EQUILIBRIUM STAGE SE

[5] PREDICTION OF LIQUID LIQUID EQUILIBRIA IN MULTICOMPONENT AROMATICS EXTRACTION SYSTEMS BY USE OF THE UNIFAC GROUP CONTRIBUTION MODEL [J].

MUKHOPADHYAY, M ;

DONGAONKAR, KR .

INDUSTRIAL & ENGINEERING CHEMISTRY PROCESS DESIGN AND DEVELOPMENT, 1983, 22 (03) :521-532

[6] SOLVENT-EXTRACTION OF AROMATICS FROM MIDDLE DISTILLATES - EQUILIBRIA PREDICTION METHOD BY GROUP CONTRIBUTION [J].

RAHMAN, M ;

MIKITENKO, P ;

ASSELINEAU, L .

CHEMICAL ENGINEERING SCIENCE, 1984, 39 (11) :1543-1558

[7]

SORENSEN JM, 1980, PHASE EQUILIBRIA SEP

← 1 →