Purification method for tertiary butyl hydroquinone
A technology of tert-butyl hydroquinone and di-tert-butyl hydroquinone, which is applied in the field of purification of tert-butyl hydroquinone, can solve problems such as low process efficiency, and achieve the effect of reducing process cost
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Embodiment 1
[0020] Example 1: Weigh HQ (0.163g), TBHQ (0.681g) and DTBHQ (0.156g) into a 25ml round bottom flask, then add 5ml of distilled water into the flask and stir at 20°C for 30min, the resulting mixture is used Buchner funnel suction filtration to obtain filter cake. The filter cake was transferred to a 25ml round bottom flask, then 5ml of formic acid was added to the flask and stirred at 20°C for 30min, and the resulting mixture was suction filtered using a Buchner funnel. The filtrate obtained by suction filtration was distilled off under reduced pressure to remove formic acid, and after drying, 0.653 g of white solid powder was obtained. The mass content of TBHQ was 99.07%, the content of DTBHQ was 0.01%, and HQ was not detected by gas chromatography analysis. The recovery rate of TBHQ was 95.0%.
Embodiment 2
[0021] Example 2: Weigh HQ (0.163g), TBHQ (0.681g) and DTBHQ (0.156g) into a 25ml round bottom flask, then add 5ml of distilled water to the flask and stir at 0°C for 30min, the resulting mixture is mixed with a cloth filter through a funnel to obtain a filter cake. The filter cake was transferred to a 25ml round bottom flask, then 5ml of formic acid was added to the flask and stirred at 0°C for 30min, and the resulting mixture was suction filtered using a Buchner funnel. The filtrate obtained by suction filtration was distilled off under reduced pressure to remove formic acid, and after drying, 0.625 g of white solid powder was obtained. The mass content of TBHQ was 99.32%, the content of DTBHQ was 0.01%, and HQ was not detected by gas chromatography analysis. The recovery rate of TBHQ was 91.2%.
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