Method for synthesising 2-ethyl-anthraquinone

Details Method for synthesising 2-ethyl-anthraquinone Method for synthesising 2-ethyl-anthraquinone

C - Chemistry, Metallurgy

07

C

C07C 50/16 (2006.01) C07C 46/00 (2006.01)

Patent

CA 2214017

A method comprising breaking down a complex of 2-(4'-ethylbenzoyl)benzoic acid, nHF and mBF¿3? to almost completely eliminate HF and BF¿3?. The remaining solid is cyclised in concentrated sulphuric acid or oleum into non-pure 2-ethyl-anthraquinone (EAQ) which is then purified using a basic aqueous solution and by sublimation to give an EAQ that is pure enough to be used in a known manner for hydrogen peroxide synthesis.

Ce procédé consiste à décomposer le complexe de l'acide 2-(4'- éthylbenzoyl)benzoïque, nHF, mBF3 pour obtenir une élimination presque complète de HF et BF3. Le solide restant est cyclisé dans de l'acide sulfurique concentré ou dans de l'oléum en 2-éthyl-anthraquinone (EAQ) impure. Cette EAQ est purifiée par une solution aqueuse basique et par une "sublimation" pour conduire à une EAQ d'une pureté appropriée pour son utilisation connue dans la synthèse du peroxyde d'hydrogène.

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