By J. F. Coetzee

Suggested tools for Purification of Solvents and checks for Impurities is a compilation of suggested approaches for purification of solvents and checks for solvent impurities. Ten solvents are coated: acetonitrile, sulfolane, propylene carbonate, dimethyl sulfoxide, dimethylformamide, hexamethylphosphoramide, pyridine, ethylenediamine, N-methylacetamide, and N-methylpropionamide.
This booklet is constituted of 12 chapters and opens with an advent to basic elements of impurity results. the explanation for the choice of solvent is defined, and the relative reactivities of solutes in numerous solvents are defined. the subsequent chapters care for dipolar aprotic solvents (acetonitrile, sulfolane, propylene carbonate, dimethyl sulfoxide, dimethylformamide, hexamethylphosphoramide, and pyridine) for which impurity results should be rather critical, besides their basic homes (freezing and boiling temperatures, density, dynamic viscosity, refractive index, dipole second, relative permittivity, etc.) and the common chronology of advancements in purification systems and assessments for purity. the ultimate 3 chapters concentrate on amphiprotic solvents (ethylenediamine, N-methylacetamide, and N-methylpropionamide).

This monograph should be an invaluable source for chemists.

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26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. W. H. Lee, "Cyclic Carbonates," in J. J. , "The Chemistry of Non-Aqueous Solvents," Vol. IV, Academic Press, New York, 1976, Ch. 6. L. M. Mukherjee, CRC Crit. Rev. Anal. Chem. J5, 325 (1975). R. J. Jasinski, Adyan. Electrochem. Electrochem. Eng. 8 253-335 (1971). , "Propylene Carbonate," Technical Bulletin, 1960. R. L. Kronick and R. M. Fuoss, J. Amer. Chem. Soc. 77, 6114 (1955). W. D. Thesis, University of California, Berkeley (1958). R. Payne and I.

The first 20% fraction is distilled into one part of the system to remove water and dimethyl sulfide. This part of the system is then shut off and the product, about 70% of the starting material, collected in another part of the apparatus. Using a 1-m long column of 5-cm internal diameter, packed with glass Raschig rings, solvent containing^only^ 4 ppm of water was obtained. The specific conductance of this solvent, 3 χ 10 ohm cm 28 C. G. Karakatsanis and Τ. B. Reddy at 20°G, is no better than that obtained by other methods, however.

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