37results about How to "Improve hydrogen efficiency" patented technology

An organic solvent system for preparing H2O2 is prepared from C9-C10 arylhydrocarbon (100 wt portions), trioctyl phosphate (0.5-50), and 2-methylcyclohexyl acetate (0.5-90). Its advantages are high solubility of anthraquinone and hydrogenated anthraquinone in it, low by-effect and high productivity of H2O2.

The invention relates to a loop reaction device in a slurry bed, application and a method for producing hydrogen peroxide. The loop reaction device comprises a slurry bed reactor and a solid-liquid separator, wherein the upper part of the slurry bed reactor is communicated with the upper part of the solid-liquid separator, and the bottom of the slurry bed reactor is communicated with the bottom of the solid-liquid separator; and a coaxial inner sleeve is arranged in the slurry bed reactor, an outer sleeve is arranged between the inner sleeve and the outer wall of the slurry bed reactor at the upper part of the slurry bed reactor, a raw material inlet and a fluid distributor are arranged in the inner sleeve and at the bottom, a gas outlet is formed in the top of the slurry bed reactor, a filtration component is arranged in the solid-liquid separator, and a clear liquid outlet is formed in the wall of the solid-liquid separator via the filtration component. According to a hydrogenation method for producing hydrogen peroxide by an anthraquinone method with the adoption of the slurry bed loop reactor, the gas-liquid-solid three-phase separation efficiency is high, the excess local liquid holdup of a catalyst is avoided, the possibility of excessive hydrogenation is reduced, the hydrogenation efficiency is further effectively improved and a hydrogen peroxide product with relatively high concentration can be obtained.

The invention discloses a hydrogenation process for hydrogen peroxide production. The process comprises the following steps: (1) in a hydrogenation process for producing hydrogen peroxide by an anthraquinone process, arranging a hydrogenation tower I, a hydrogenation tower II and a hydrogenation tower III, and feeding hydrogen gas in three channels, i.e., hydrogen gas I, hydrogen gas II and hydrogen gas III; (2) mixing and dissolving working fluid feed and the hydrogen gas I in high-pressure gas dissolving equipment, and then, enabling the solution to enter the hydrogenation tower I for a first-stage hydrogenation reaction; (3) mixing and dissolving effluent of the first-stage hydrogenation reaction and the hydrogen gas II in the high-pressure gas dissolving equipment, and then, enabling the solution to enter the hydrogenation tower II for a second-stage hydrogenation reaction; (4) mixing and dissolving effluent of the second-stage hydrogenation reaction and the hydrogen gas III in the high-pressure gas dissolving equipment, and then, enabling the solution to enter the hydrogenation tower III for a third-stage hydrogenation reaction; and (5) enabling a material obtained after the third-stage hydrogenation reaction to flow out, carrying out gas-liquid separation, and going to next procedure. According to the process, through controlling the proportion of dissolved hydrogen, not only can a relatively high hydrogenation effect be achieved, but also minimal anthraquinone degradation products are obtained, so that the improvement on product concentration and device scale and the lowering of the consumption of a catalyst and anthraquinone are facilitated.

The invention discloses a slurry-bed circulation flow reactor and an application and a method for producing hydrogen peroxide. The slurry-bed circulation flow reactor comprises an ascension pipe, an expanding section used for expanding pipe diameter of the upper part of the ascension pipe and a solid-liquid separator, wherein the expanding section is communicated with the upper part of the solid-liquid separator; the bottom of the solid-liquid separator is communicated with the bottom of the ascension pipe; a three-phase separator of a double sleeve structure is arranged in the expanding section; a raw material inlet is formed in the bottom of the ascension pipe; a gas outlet is formed in the top of the expanding section; a filtration component is arranged in the solid-liquid separator; and a clear liquid outlet is arranged at the upper part of the solid-liquid separator by virtue of the filtration component. According to a method for producing hydrogen peroxide by taking the slurry-bed circulation flow reactor as a hydrogenation reactor, the gas-liquid-solid three-phase separation efficiency is high; the local excessive hydrogenation of the catalyst is avoided; the excessive hydrogenation possibility is reduced; the hydrogenation efficiency is high; and hydrogen peroxide products with high concentration can be produced.