2-Ethylanthraquinone synthesis
- Product Name:2-Ethylanthraquinone
- CAS Number:84-51-5
- Molecular formula:C16H12O2
- Molecular Weight:236.27
1151-14-0
84-51-5
General procedure for the synthesis of 2-ethylanthraquinone from 2-(4-ethylbenzoyl)benzoic acid: (2) 2-(4-ethylbenzoyl)benzoic acid prepared as described above and concentrated sulfuric acid were sequentially passed through a piping system comprising a T-type mixer, a reactor A, a Y-type mixer, a reactor B and a separator. In this system, 2-(4-ethylbenzoyl)benzoic acid enters the T-mixer at 180° C., while concentrated sulfuric acid enters the T-mixer at 50° C. The mass-volume ratio of the two is 1 g:3 mL. The mixing temperature in the T-mixer is 50° C., and the residence time is 35 seconds. Subsequently, the mixture enters reactor A and is reacted at 120°C for 30 minutes. Next, it was passed through a Y-mixer at 40°C and finally into Reactor B where the reaction was completed at 50°C to produce 2-ethyl anthraquinone in 95.5% yield.
1151-14-0
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84-51-5
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Yield:84-51-5 95.5%
Reaction Conditions:
with sulfuric acid at 50 - 120; for 0.5 h;Temperature;
Steps:
2.2
(2) The above-obtained 2-(4-ethylbenzoyl)benzoic acid and concentrated sulfuric acid are successively passed through a tube composed of a T-type mixer, a reactor A, a Y-type mixer, a reactor B, and a separator. In the reactor, the reaction produces 2-ethylanthraquinone; Yield 95.5%;Wherein, 2-(4-ethylbenzoyl) benzoic acid into the T-type mixer when the temperature is 180 ° C, concentrated sulfuric acid into the T-type mixer when the temperature is 50 ° C;The amount of 2-(4-ethylbenzoyl)benzoic acid and concentrated sulfuric acid is 1g:3mL;T-mixer temperature of 50 ° C mixing, residence time 35s;Reaction temperature in the reactor A is 120 ° C, the reaction time is 30min;Y-mixer temperature is 40 °C;Reaction temperature in reactor B is 50 °C;
References:
CN108101726,2018,A Location in patent:Paragraph 0025; 0030; 0035; 0040; 0045; 0050; 0055; 0060
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