Patent DE81068
preparation of hydrochinone3kg potassium persulfate are gradually introduced Into a solution of 1.2kg phenol and 2.5kg NaOH in 75Kg H
2O. The mixture is left alone for 1 to 2 days at room temp or 40°C. After the rxn is over carbonic acid is introduced, the unreacted phenol is removed by steam distillation, the remainder is boiled with dilute HCl or H
2SO
4 and the hydrochinone extracted with Et
2O.
preparation of toluhydrochinoneIf equivalent amounts of ortho- or meta-cresol are treated as above an oily residuum remains, which, when recrystallized from benzene, gives toluhydrochinone with a mp of 124°C
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psyloxy--