System methyl acetate

Wisniak, J. and Gabai, E. Isobaric vapor-liquid equilibria in the systems methyl acetate + 1-hexene and 1 -hexene + 2-propanol, J. Chem. Eng. Data, 41(1) 143-146, 1996. 

For the system methyl acetate( 1 )/methanol(2), the following are recommended values for Wilson parameters ... 

For the system methyl acetate-acetic acid-methanol-water he determined VLE data for all six binary systems, unless thermodynamically consistent values were already available from literature, for the four ternary systems and for the quaternary system with and without the catalyst. It was found that the presence of sulphuric acid in the composition range of up to 4 wt-%, as normally encountered in homogeneous catalysis, had negligible effect on the equilibrium data calculated on acid-free basis. 

Figure 7.9 Vapor-liquid equilibrium diagram for the ternary system methyl acetate (l)-methanol (2)-LiN03 (3) at 101.33 kPa. (Experimental data from Vasileva et al. [30] and Topphoff et al. [31].)...

Fitting a can improve the regression results significantly. There are some systems where the adjustment of a is even necessary. An example is the system methyl acetate-water, which exhibits a complicated isothermal behavior with a miscibility gap and a homogeneous azeotrope (Figure F.7). 

Figure F.7 Isothermal VLE behavior of the system methyl acetate (1)-water (2) at 323.15 K. (Data from Loehe et al.

The following diagrams shall illustrate the procedure. Figure F.9 shows the Ag-plot for the system methyl acetate-water after fitting the parameters. There is a miscibility gap between 0.062 < x < 0.686, which is confirmed by the tangent shown in the plot. There is no other common tangent possible thus, the parameteri> can be accepted. 

Nagata, I. Hayashida, H. Vapor-liquid equilibrium data for the ternary systems methyl acetate - 2-propanol - benzene and methyl acetate - chloroform - benzene J. Chem. Eng. Jpn. 1970,3, 161-166... 

Wisniak, J. Tamir, A. Vapor-liquid equilibria at 760 mmHg in the systems methyl acetate toluene, and methyl methacrylate - toluene J. Chem- Eng. Data 1989,34,16-19... 

Wisniak, J. Yardeni, B. Sling, T. Segura, ft Isobaric vapor-liquid equiUbriain the systems methyl acetate -i-2,2 -oxybis[propane], 2,2 -oxybis[propane] + toluene, and methanol -l- 2-methyl-2-butanol J. Chem. Eng. Data 2001,46,223-228... 

Interfadal Tensions, Entry, Spreading, and Bridging Coefficients for the Partially Miscible System Methyl Acetate-Ethylene Glycol at 20 C... 

Nagata, I. Vapor-liquid equilibriums for the ternary system methyl acetate Chem. Eng. Data 1962, 7, 461-466. 

Solvent extraction is subject to limitations imposed by the relatively unfavourable partition coefficients between aqueous solution and organic solvents that are shown by many organic acids. Diethyl ether alone will extract the most hydrophobic acids, whereas ethyl acetate improves the extraction of some of the more hydrophilic acids. The most suitable solvent can be selected by consideration of the acid or acids of interest [e.g. ether for phenyl-lactic acid, ethyl acetate for some other aromatic acids (Karoum et al, 1968)], although diethyl ether followed by ethyl acetate extraction, as employed by n any workers, provides a more comprehensive extraction system. Methyl acetate has been shown to increase the extraction of more hydrophilic acids such as citric acid (Lawson etal, 1976). 

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