Extraction constants into methylene chloride

Several typical extraction constants, Kgr for the transfer of permanganate from an aqueous solution into methylene chloride are listed in Table 1. 

Table I. Extraction Constants for the Transfer of Permanganate from Water into Methylene Chloride (32)...

Methacrylamide Methyl methacrylate (76 g) is shaken for 7 days with ammonia solution (d 0.885 390 ml). The homogeneous solution is then evaporated in portions in a vacuum (19 mm) on a water-bath (78°), and the crude product is dried over calcium chloride to constant weight (65 g), broken into small pieces, and dissolved in methylene chloride (580 ml) boiling under reflux. The solution is filtered through a filter heated by hot water, and the residue is extracted again with methylene chloride (60 ml). When the filtrates are cooled in an ice-bath, monomeric methacrylamide crystallizes two further fractions can be obtained from the mother liquors, bringing the total yield of material melting at 95-109° up to 48 g (75%). To obtain the pure amide, as thin tablets, m.p. 110-111°, requires repeated recrystallization. 

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