[OH-:1].[K+:2].[CH:3]([CH:9]1[CH2:14][C:13](=[O:15])[O:12][C:10]1=[O:11])=[CH:4][CH2:5][CH2:6][CH2:7][CH3:8]>C(O)CO>[K+:2].[K+:2].[CH:3]([CH:9]([CH2:14][C:13]([O-:12])=[O:15])[C:10]([O-:1])=[O:11])=[CH:4][CH2:5][CH2:6][CH2:7][CH3:8]Into a glass flask there were charged 16 grams of potasium hydroxide, 41.5 grams of ethyleneglycol and 25.5 grams of hexenyl succinic anhydride. The mixture was stirred for two hours at 100° C. Yield: 78.9 grams=98.0% of theoretical. The catalyst solution thus obtained is hygroscopic.
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