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Study on the Production of Hydrogen Peroxide by Catalytic Oxidation of 2-Ethylanthrahydroquinone

Author: LiHongTao
Tutor: MiZhenTao
School: Tianjin University
Course: Chemical processes
Keywords: Peroxide 2 - ethyl hydrogen anthraquinone Catalytic Oxidation Dioctylamine Oxidation Kinetics Partition coefficient
CLC: TQ123.6
Type: Master's thesis
Year: 2007
Downloads: 118
Quote: 0
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Abstract


At present over the industrial production of hydrogen peroxide, the the anthraquinone method is still the main method of production. Application catalyst in the oxidation of hydrogen anthraquinone the added catalysts can significantly increase the rate of oxidation of hydrogen anthraquinone, thereby reducing production costs, improve production efficiency. This paper studies the the amine catalysts catalytic oxidation of 2 - ethyl hydrogen anthraquinone. Dripper fixed bed subjected to hydrogenation reaction, the working solution of the anthraquinone, anthraquinone working solution and hydrogen, and flows from top down through the fill Pd/Al2O3 (Pd%: 0.28% ~ 0.32%) of the reactor of the catalyst in the reaction temperature 60 ℃, pressure 0.25MPa, anthraquinone working solution and hydrogen gas space velocity of up to about 7.9g of L-1 were 2.66h-1 and 13.32h-1 conditions of hydrogenation of the anthraquinone working solution efficiency. At atmospheric pressure the reaction temperature is 50 ℃, the air flow rate of 1.0L · min-1 under the conditions, has been largely eliminated when the stirring speed up to 2750 r · min-1 Shi hydrogen anthraquinone oxidation reaction gas diffusion. Determination of the primary amine (n-butylamine and cyclohexylamine), secondary amines (di-n-butylamine and di-n-octylamine) and tertiary amines (tri-n-octylamine and triethylamine) six kinds of basic organic amine compound, at a concentration The catalyst was added after the impact of the air flow rate and the reaction temperature on the oxidation of hydrogen anthraquinone, the rate of oxidation reaction of the hydrogen of anthraquinone with the catalyst concentration, air flow rate and the reaction temperature increased with increasing. By contrast, secondary amines, in particular, the catalytic oxidation of di-n-octylamine better. The study Dioctylamine catalytic oxidation process, exponential type model regression 2 - ethyl hydrogen anthraquinone oxidation kinetics equation: cytochrome c Determination of superoxide anion radicals in the oxidation of hydrogen anthraquinone, adding antioxidants and phosphoric acid, the oxidation rate of the hydrogen anthraquinone, respectively increase and decrease of the phenomenon, does not generate hydrogen peroxide in the oxidation of the hydrogen anthraquinone. The hydrogen proton free radical reaction is generated in the oxidation of hydrogen anthraquinone control step, is capable of a good explanation of amine compound to improve the rate of oxidation of the hydrogen anthraquinone reasons. The oxidation catalyst the anthraquinone working hydrogenated process and oxidation of the working fluid extraction process, and found that oxidation catalyst of this two processes, substantially no influence of the oxidation catalyst in the secondary amine, especially di-n-octylamine, the best effect can be applied oxidation and extraction integrated technology as the catalyst used in reactive extraction integrated to provide the basic data.

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CLC: > Industrial Technology > Chemical Industry > Non-metallic elements and their inorganic compounds, the chemical industry > Oxygen > Peroxide
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