United States Patent Office Patented Mar
3,243,454 United States Patent Office Patented Mar. 29, 1966 2 time. A preferred method of carrying out our process 3,243,454 PROCESS OF PREPARING ALKAL METAL is to reflux an aqueous solution of an alkali metal is SETIONATES ethionate and then remove excess water by evaporation. Donald L. Klass, Barrington, and Thomas W. Martinek, The following non-limiting examples illustrate the scope Crystal Lake, ii., assignors, by mesne assignments, to of our invention and, to a limited extent, compare our Union Oil Corpany of California, Los Angeles, Calif., invention with the prior art. a corporation of California Example I No Drawing. Filed Apr. 4, 1962, Ser. No. 184,939 6 Claims. (C. 260-513) A 5.0-g. portion of sodium vinyl sulfonate was dis O Solved in 50 ml. of water and the solution was refluxed This invention relates to new and useful improvements for 6 hours, with air-blowing. Evaporation of the excess in methods for the preparation of alkali metal salts of Water gave sodium isethionate in quantitative yield. The isethionic acid. identification of the product was by elemental analysis: The preparation of the alkali metal salts of isethionic calculated C, 16.22% wt., H, 3.40% wt., S, 21.65% wt., acid from ethylene oxide and an alkali metal bisulfite using 15 Na, 15.53% wt. Found: C, 16.8% wt., H, 3.4% wt., S, high pressure equipment is known in the art (see Sexton 22.2% wt., Na, 15.3% wt. Infrared analysis indicated et al. U.S. Patent 2.810,747).
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