Abstract: A system for containing a chemical mixture including a liquid with at least two intermiscible components having different densities, and a gas. The system includes a spherical reservoir, including top and bottom sections and a bottom; a vertically positioned standpipe having a top section in fluid communication with the top section of the spherical reservoir through a connection pipe, and a bottom section including a bottom, in fluid communication with the bottom section of the spherical reservoir through a connection pipe; a conduit for supplying the gas from the chemical mixture; and first and second draining pipes in fluid connection with the bottoms of the spherical reservoir; and of the standpipe, respectively. The bottom section of the standpipe is higher than the bottom section of the spherical reservoir, and the connection pipe is a downwardly-inclined pipe from the bottom section of the standpipe to the bottom section of the spherical reservoir.

Abstract: A process for production of hydrogen peroxide which comprises the following steps: (a) hydrogenation of a working solution comprising at least one non-ionic quinone compound selected from the group consisting of anthraquinone and its derivatives, phenanthrenequinone and its derivatives, naphthoquinone and its derivatives, and benzoquinone and its derivatives, wherein the total molecular weight of optional groups attached to the quinone skeleton is lower than 500, to obtain at least one corresponding hydroquinone compound; (b) oxidation of the at least one hydroquinone compound to obtain hydrogen peroxide; and (c) separation of the hydrogen peroxide, during and/or subsequently to the oxidation step b); wherein the working solution of either step a) and/or b) comprises less than 30% by weight of organic solvent.