Acetone → 4-Methylcatechol

A reaction flask having an inner volume of 200 ml and provided with a thermometer, a stirrer, a reflux condenser and a dropping funnel was charged with 54.05 g (0.50 mol) of para-cresol and 0.054 g of acetonyl acetone. While the resultant mixture was continuously stirred, 5.59 g (0.025 mol) of an acetone solution of 34.0 percent by weight of peracetic acid was introduced dropwise at a temperature of 80° C over a period of 20 minutes. After termination of the dropwise introduction of the peracetic acid solution, the reaction system was stirred at the same temperature for an additional period of 50 minutes to bring the reaction to completion. Thereafter, the reaction mixture was analyzed for unaltered para-cresol and formed 4-methyl-1,2-dihydroxybenzene by gas chromatography. The results showed the conversion of para-cresol to be 4.19 percent and the selectivity for 4-methyl-1,2-dihydroxybenzene to be 73.6 percent relative to peracetic acid and 88.4 percent relative to para-cresol respectively. From the reaction mixture, acetone, formed acetic acid and para-cresol were recovered by distillation. When the recovered mixture was analyzed for acetonyl acetone by gas chromatography, the recovery ratio of acetonyl acetone was found to be 88 percent.

1. customA reaction flask having
2. customan inner volume of 200 ml and provided with a thermometer, a stirrer, a reflux condenser and a dropping funnel
3. customthe reaction to completion

ORD record

ord-ca93d47a98d140da98e8a4171747e40d

Source dataset

uspto-grants-1978_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04066707