TH53393A - Continuous hydrogenation process - Google Patents

Abstract

DC60 (27/12/44) This invention relates to a continuous catalytic hydrogenation process in which a reaction mixture containing the substance to be hydrogenated, the hydrogenation product, hydrogen, and the catalyst is circulated within a reactor, pre-removing the hydrogenation product from the reactor, and the substance to be hydrogenated and hydrogen are fed into the reaction. In this process, the substance to be hydrogenated and hydrogen are mixed before entering the reactor. A Venturi injector is particularly suitable as a mixing aid. This invention relates to a continuous catalytic hydrogenation process in which a reaction mixture containing the substance to be hydrogenated, the hydrogenation product, hydrogen, and the catalyst is circulated within a reactor, pre-removing the hydrogenation product from the reactor, and the substance to be hydrogenated and hydrogen are fed into the reaction. In this process, the substance to be hydrogenated and hydrogen are mixed before entering the reactor. A Venturi injector is particularly suitable as a mixing aid.

Claims (11)

1. A continuous catalytic hydrogenation process in which a reaction mixture containing the substance to be hydrogenated, the hydrogenation product, hydrogen, and the hydrogenation catalyst suspended in the reaction mixture is circulated in a reactor, removing a portion of the hydrogenation product from that reactor, and feeding the hydrogenated substance and hydrogen into a reactor characterized by the fact that the substance to be hydrogenated and hydrogen are mixed [sic] before entering the reactor. 2. The process described in claim 1, which specifies that the mixing of the hydrogenated substances and hydrogen is carried out in a manner that results in a gas bubble diameter no greater than 2.5 mm, with the recommended diameter being less than 1.5 mm. 3. Any of the processes described in claims 1 and 2 that specify the use of a Venturi nozzle, perforated plate, or frit as a mixing aid. 4. Any of the processes described in claims 1-3 that demonstrate the characteristic that the system contains a substance to be hydrogenated and that hydrogen is inhibited from combining. 5. The process described in claim 4, which characterizes that a system in which the combined cohesive surface tension of the skin for the associated components in that system is at least 16 mN/m has been used as an inhibitor of aggregation. 6. Any of the processes described in claims 1-5 that demonstrate the characteristic that the mixture of hydrogen and the substance to be added to the hydrogen contains a gaseous proportion of 40% by volume to 80% by volume. 7. Any of the procedures under claims 1-6 demonstrate that the reactor is independent of interference. 8. Any of the procedures under Claim [sic] 1-7, which describe the characteristics of a stirring vessel, gas-lifting reactor, fluidized-bed reactor or loop reactor, have been used with that reactor. 9. Any of the procedures under claims 1-8 that demonstrate that the substance to be hydrogenated is a substituted anthraquinone or a mixture of substituted anthraquinones and/or tetrahydro derivatives with hydrogenated ring of that substance. 10. Any of the procedures under claims 1-9 that demonstrate the characteristic that the substance to be hydrogenated is as recommended above or added to a solution. 11. A procedure for the production of hydrogen peroxide by cyclic anthraquinone process consisting of catalytic hydrogenation of a hydrogenated working solution with oxygen gas or an oxygen-containing gas, yielding hydrogen peroxide and substituted anthraquinone or a mixture containing tetrahydroanthraquinone hydrogenated to its ring, and the extraction of hydrogen peroxide from the obtained mixture after oxidation, characterized by the hydrogenation process as described in claims 9 or 10.