Patent CH74943 (http://l2.espacenet.com/dips/viewer?PN=CH74943&CY=gb&LG=en&DB=EPD)
Ethyl Acetate. JOSEF HABERMANN AND H. BREZINA. Tech. Hochschule, Brünn. J. prakt. Chem., 80, 349-354. - A mixture of 400 g. of 96 % alc., 240 g. glacial AcOH, and 160 g. anhydrous CuSO4 is kept at the ordinary temp. for 24 hr., and is then heated for 12-14 h. on the H2O bath in both cases with frequent shaking. The liquid is decanted from the CuSO4, heated again for 10 h. with another 50 g. of anhydrous CuSO4, then distilled after the removal of the metallic salt. The distillate is fractionally distilled, and the main fraction, b. 70-2°, is repeatedly washed with saturated brine, dried by ignited MgSO4, and again distilled. The distillate b. 70-2°, and has vapor density corresponding with that of an equimol. Compd. Of EtOH and AcOEt. By prolonged shaking with CaCl2, the EtOH seems to be removed, for the liquid now has b. p. 77° and a vapor density corresponding to that of AcOEt. A small quantity of the same comp., b. 70-2°, can be isolated from conc. AcOEt by systematic fractionation.
B. F. PARLET BRENTON.