Katalyticka hydrogenace 2-ethyl-9,10-anthrachinonu

Abstract

The dissertational work concerns the catalytic hydrogenation of 2-ethyl-9,10-anthraquinone in liquid phase in a batched isothermal reactor in which the hydrogenatical catalyst in suspension is ideally mixed at atmospheric pressure aiming the effects of solvent, catalyst and conditions of reaction. The mixed solvent was made from polar and non-polar solvents. The non-polar part of the mixed solvent was always Shellsol AB (a mixture of alkyl aromatic hydrocarbons C9 - C11) and the polar part was N, N, N', N'-tetra-n-butylurea, 2-ethyl-hexan-1-ol and 2,6-dimethylheptan-4-ol. The resultant reaction schema of the catalytic hydrogenation of 2-ethyl-9,10-anthraquinone differs from the existing published opinions in the way that the consequential hydrogenation of 2-ethyl-5,6,7,8-tetrahydro-9,10-anthrahydroquinone which creates product of 2-ethyl-1,2,3,4,5,6,7,8-oktahydro-9,10-anthrahydroquinone does not assert in a large scale and 2-ethyl-5,6,7,8-tetrahydro-9-anthrone or 2-ethyl-5,6,7,8-tetrahydro-10-anthrone are created by hydrogenation of the aromatic ring of 2-ethyl-9-anthrone or 2-ethyl-10-anthrone. The values of reaction rate constants and adsorption coefficient were calculated from experimental data by the closest-fitting mathematical model. Some parts of the reaction system were extended by using reverse reactions. The influence of the solvent system on hydrogenation of 2-ethyl-9,10-anthrahydroquinone was evaluated on the basis of the structure of the reaction mixture, reaction rate constants, and selectivity of formation of reaction products depending on the solvent system, weight ratio of solvent and concentration of flowing water. The range of hydrogenation of the aromatic ring of 2-ethyl-9,10-anthrahydroquinone is increasing by decreasing of the weight ratio of solvents, creation of anthrons is accelerated by increasing of flowing water concentration. 2,6-dimethylheptan-4-ol/Shellsol AB is the most suitable solvent system in the production of hydrogen peroxide by anthraquinone processAvailable from STL Prague, CZ / NTK - National Technical LibrarySIGLECZCzech Republi