51 results about "Anthraquinone process" patented technology

The utility model relates to a slurry bed hydrogenation reactor for producing hydrogen peroxide by an anthraquinone process. The slurry bed hydrogenation reactor comprises a hydrogenation reactor, a recycle gas condenser and a degassing tank, wherein the bottom of the hydrogenation reactor is provided with a working solution feeding distributor and a hydrogen feeding distributor, the middle of the hydrogenation reactor is provided with a gas raising cylinder, the gas raising cylinder and a straight cylinder at the lower part of the reactor have the same diameter and are provided with a gap, and an overflow area is arranged above the gas raising cylinder; an annular space between the gas raising cylinder and the upper expanded section of the reactor is a discharging standing area, a discharging baffle is arranged at a discharging port of the standing area, a discharging pipe is connected with a degassing tank, and a gas phase balance pipe and a gas-liquid balance pipe are sequentially arranged at the top of the degassing tank from top to bottom; the top of the hydrogenation reactor is connected with the recycle gas condenser. By adopting internal and external circulation two-stage degassing and solid separation, the conditions that the discharged material of the hydrogen reactor carries hydrogen and the concentration of a catalyst is too high are avoided, and the consumption of raw materials is reduced.

The utility model discloses an anthraquinone process hydrogen peroxide production oxidation tail gas zero emission device, which relates to the technical field of anthraquinone process hydrogen peroxide production, and comprises a hydrogen peroxide oxidation tail gas pipeline connected with a tail gas pressurization circulation unit through a triple cooling heavy aromatics recovery unit, and the triple cooling heavy aromatic hydrocarbon recovery unit comprises a tail gas condensation aromatic hydrocarbon recovery part, a main cold aromatic hydrocarbon recovery part and an expansion refrigeration aromatic hydrocarbon recovery part. The device has the beneficial effects that most of heavy aromatics in the oxidized tail gas are recovered by adopting triple cooling and triple separation, so that the purpose of saving energy consumption is achieved; and meanwhile, the differential pressure energy of the oxidized tail gas is recovered and converted into kinetic energy to drive an oxygen compressor to operate by adopting an expansion refrigeration aromatic hydrocarbon recovery part, and the recovery efficiency of aromatic hydrocarbon is improved by utilizing the cold energy of pressure expansion.

The invention relates to the technical field of hydrogen peroxide preparation through an anthraquinone method, in particular to a working solution regeneration treatment method and device in the process of hydrogen peroxide preparation through the anthraquinone method, and the method comprises the following steps: step 1, adsorbing and removing moisture in a working solution by adopting a solid alkaline material; step 2, applying an electric field to the working solution, so that water drops mixed in the working solution are charged; step 3, enabling the working solution to flow along a surface with sieve pores, applying another electric field on the surface, enabling the electrified water drops to move towards the surface under the action of the electric field, enabling the water drops to be polarized and subjected to electrostatic induction by the electric field, enabling two ends of the water drops to be charged with opposite charges to form induced dipoles, enabling positive and negative dipoles of adjacent water drops to attract each other, colliding with each other, and coalescing into large water drops, large water drops are discharged along the surface with the sieve holes; 4, the working solution is transferred to a carclazyte bed, a degradation product is reduced into anthraquinone, and then the working solution repeatedly enters a hydrogenation workshop section. The method has the following beneficial effects that the regeneration effect is good, the cost is low, and the service life of aluminum oxide is prolonged.

The application provides an extraction device and process for producing hydrogen peroxide by an anthraquinone method. The device comprises an extraction tower, a high-concentration hydrogen peroxide discharge port arranged at the bottom of the extraction tower, a feed inlet arranged at the lower part of the extraction tower, and a water inlet arranged at the upper part of the extraction tower. A raffinate phase discharge port is arranged at the top of the extraction tower and is connected to a raffinate separator through a pipeline. A light phase outlet is arranged at the upper part of the raffinate separator, and a heavy phase outlet is arranged at the lower part of the raffinate separator. The heavy phase outlet is connected to multiple outlet pipelines according to different hydrogen peroxide concentrations after passing through a hydrogen peroxide concentration controller. The outlet pipeline with low hydrogen peroxide concentration is connected to a back feeding port of the extraction tower. The device and process can realize high extraction concentration, high extraction efficiency, controllable product concentration, and the like. Meanwhile, the device is provided with a safety interlocking system, which can effectively reduce the risk of over-temperature and over-pressure accidents.

Described is a catalyst obtained by supporting magnesium and cerium on activated alumina, firing same to immobilize the metals, and then impregnating same with palladium and performing reduction thereon, and is applied, when hydrogen peroxide is prepared by means of an anthraquinone process, to operation solution regeneration or hydrogenation, and thus an efficient regeneration conversion rate or synthesis yield is achieved.

The invention belongs to the technical field of catalyst preparation and application, and particularly relates to a method for large-scale preparation of a supported palladium monatomic catalyst and application of the catalyst in production of hydrogen peroxide by an anthraquinone method. The preparation method comprises the following steps: dissolving palladium chloride and an aryl complex or a palladium amine complex in a mixed organic solvent; then dipping with a gamma-Al2O3 microsphere carrier with a specific crystal phase according to a certain mass ratio; then reducing a palladium monatomic precursor in situ through an ultraviolet irradiation method; and carrying out medium-low temperature hydrogenation to obtain the supported palladium monatomic catalyst. The large-steric-hindrance monatomic dispersion technology and in-situ carrier regulation and control are combined, large-scale production of the catalyst is achieved, and the obtained catalyst has high activity, high dispersity and excellent mechanical property and stability, is suitable for hydrogenation reaction in anthraquinone process hydrogen peroxide production, and has wide application prospects. The equivalent hydrogenation efficiency can be improved, and the production cost of the catalyst can be reduced.

The utility model discloses an anthraquinone process hydrogen peroxide palladium catalyst in-situ regeneration device, and belongs to the field of catalyst regeneration. The regeneration device comprises an in-situ regeneration hydrogenation tower, a purging unit is arranged in the in-situ regeneration hydrogenation tower, a gas inlet of the purging unit is connected with a steam pipeline and a nitrogen pipeline outside the tower, the in-situ regeneration hydrogenation tower is provided with a soak solution inlet and a waste liquid outlet, and the soak solution inlet is connected with an ethanol tank, an acetic acid tank, a thermionic water tank and a soft water tank. The in-situ regeneration hydrogenation tower is provided with a vacuumizing pipe orifice; and the vacuumizing pipe orifice is connected with a vacuumizing system. Compared with the prior art, the regeneration device disclosed by the utility model can thoroughly remove all inorganic and organic impurities on the palladium catalyst, is high in regeneration efficiency and low in cost, and has good popularization and application values.

The utility model discloses an anthraquinone recovery device which comprises a heavy aromatics soaking pool, a heavy aromatics anthraquinone recovery pipe and a heating device, and by utilizing the characteristic that the solubility of anthraquinone in heavy aromatics is large, in the process of producing hydrogen peroxide by an anthraquinone method, a replaced waste filter element containing a large amount of anthraquinone is put into the heavy aromatics soaking pool, and the heavy aromatics anthraquinone recovery pipe is used for recovering the heavy aromatics. The heavy aromatics soaking pool is heated through the heating device, residual anthraquinone on the filter element is fully dissolved in the heavy aromatics soaking pool, a heavy aromatics solution containing anthraquinone enters the anthraquinone recovery system through the heavy aromatics anthraquinone recovery pipe, anthraquinone is fully recycled, waste of anthraquinone is avoided, and meanwhile, the utilization rate of the heavy aromatics is improved. The harm of wastes to the environment is greatly reduced.

The application discloses a process method for conversion of working liquid solvent in hydrogen peroxide production and belongs to the technical field of hydrogen peroxide production. The process method realizes conversion between acetic ester system and tetrabutylammonium system of working liquid solvent by improving process parameters of hydrogenation, extraction and white clay bed regeneration among anthraquinone method hydrogen peroxide solvents. The application can be used by mutual conversion according to market raw material price change, maximally reduces raw material cost, meets diversified chemical production, meanwhile, the process method can reduce system acidity, reduce hydrogenation side reaction, reduce alumina consumption and reduce energy consumption in the running process.

The present invention provides a method for regenerating a working solution used in the production of hydrogen peroxide by the anthraquinone process, belonging to the technical field of hydrogen peroxide synthesis. The regeneration method is as follows: the working solution is introduced into a regeneration bed and contacted with an internal regenerant for a period of time for regeneration, and then the working solution is output to obtain the regenerated working solution. The preparation method of the regenerant includes preparing modified alumina, compounding, and surface modification. The method of surface modification is as follows: the CaOMnO2 / modified alumina composite is added to deionized water, stirred for 5-7 h, then tetraethyl orthosilicate is added, ultrasonically dispersed, and reacted for 20-30 h. Then, centrifugation is carried out. After the precipitate is washed clean, it is added to an ethylenediaminetetraacetic acid solution, and then 3-aminopropyltriethoxysilane is added, and stirred and reacted for 3-4 h. After filtration and drying, the regenerant is obtained. The regenerant of the present invention has good regeneration effect, the regeneration increment is 16.12-21.45 g / L, and the service life reaches 99-108 days.

This invention discloses a one-step method for synthesizing metal-organic framework materials encapsulating high atomic number oxides and its application in the green catalytic synthesis of hydrogen peroxide using high-energy radiation. This invention utilizes high atomic number-doped metal-organic framework materials as catalysts, dispersing them in water while maintaining an oxygen atmosphere. Hydrogen peroxide is then obtained using high-energy radiation such as X-rays, gamma rays, alpha rays, and electron accelerators. This method is simple; compared to the industrial anthraquinone method, it does not require large-scale equipment and is pollution-free; compared to electrocatalysis, it does not require the addition of electrolytes; compared to direct hydrogen-oxygen synthesis, it does not require mixing hydrogen and oxygen, eliminating the risk of explosion; and compared to photocatalysts, it does not require additional sacrificial agents. Hydrogen peroxide can be synthesized in pure water, which facilitates subsequent separation and collection. This invention enables the synthesis of H2O2 in pure water, possessing significant economic value and broad application potential.

The application discloses a method for preparing hydrogen peroxide by photocatalysis without a sacrifice agent based on naphthalene imide / perylene imide polymer. The naphthalene imide / perylene imide polymer photocatalyst is synthesized by a hydrothermal method, and the catalyst can catalyze the reaction of oxygen and water to prepare hydrogen peroxide by photocatalysis without adding a sacrifice agent. The naphthalene imide / perylene imide polymer synthesized by the application is a photocatalyst with a donor / acceptor electron transport interface, and the structure greatly improves the electron-hole transport rate, thereby promoting the generation of hydrogen peroxide and inhibiting the decomposition of hydrogen peroxide. The application first applies the naphthalene imide / perylene imide polymer catalyst to the field of photocatalytic preparation of hydrogen peroxide. Compared with the industrial anthraquinone method and the method for preparing hydrogen peroxide by electric and thermal catalysis, the application is safe and environmentally friendly, simple to operate and low in cost.

The invention discloses a concentration process for hydrogen peroxide production extraction reaction, and belongs to the technical field of hydrogen peroxide production. The technical problem to be solved is that in an existing extraction process for producing hydrogen peroxide through an anthraquinone method, the concentration of hydrogen peroxide obtained through extraction is low, and the requirement of the market for high-concentration hydrogen peroxide is difficult to meet. According to the technical scheme, the concentration process of the extraction section in hydrogen peroxide production is characterized by comprising the following steps: pumping an acidic pure water extraction agent and a working solution into an extraction tower according to a flow rate ratio of 1: (53-60), carrying out reverse mass transfer extraction separation, and enriching acidic components to obtain hydrogen peroxide; the acidity of the acidic pure water extraction agent is 0.25-0.35 g / L, and the temperature is 50-55 DEG C; the working solution is a mixture of anthraquinone, heavy aromatics and a polar solvent.

The application discloses a preparation method of a catalyst for hydrogen peroxide production by an anthraquinone method in a fluidized bed and a product, the carrier prepared by the method has high wear resistance, the bulk density of the carrier and the catalyst is 0.650-1.050 g / ml, and the wear index is 2.400-6.000%. Active alumina powder is reacted with acid to prepare a colloid; nitric acid solution or oxalic acid solution is used as a base liquid, stirring is started, the active alumina powder and alumina colloid are added, an appropriate amount of auxiliary raw materials is added, a dispersing agent is added, the suspension subjected to high-speed shearing stirring is granulated by using a centrifugal and a spray dryer to obtain microspheres of the fluidized bed carrier, and the fluidized bed carrier is obtained through calcination. The carrier is loaded with active components and adjuvants, and the fluidized bed catalyst for hydrogen peroxide production by the anthraquinone method in the fluidized bed is obtained through drying and calcination. The customized catalyst evaluation device for hydrogen peroxide production by the anthraquinone method in the fluidized bed is used to evaluate the catalyst under the condition of a working liquid system, and the activity of the catalyst is investigated.

The utility model discloses a working solution reaction device for anthraquinone process hydrogen peroxide. The working solution reaction device comprises a vertically arranged reaction outer cylinder, each partition plate comprises two grating plates which are oppositely arranged up and down, the outer edges of the grating plates are connected to the inner wall of the reaction outer cylinder, a containing bin is formed between the two grating plates, and the four partition plates are arranged at intervals in the axial direction of the reaction outer cylinder; each flow guide cylinder is provided with two closed ends and is provided with a plurality of liquid penetrating holes, the hole diameter of each liquid penetrating hole is smaller than the particle size of a palladium catalyst, a plurality of flow guide cylinders are installed in the containing bins except the containing bin on the top layer, the flow guide cylinders are arranged in the axial direction of the reaction outer cylinder, and the diameters of the flow guide cylinders are gradually increased downwards layer by layer; and the number of the guide cylinders arranged in each layer of accommodating bin is the same. The utility model solves the problems that the resistance of a bed layer is increased and a catalyst is easy to block after a fixed bed in a working solution hydrogenation stage in the production process of hydrogen peroxide by an anthraquinone process is used for a period of time.

The application discloses a kind of high-efficiency condensing separation equipment for anthraquinone hydrogen peroxide production, anthraquinone hydrogen peroxide technical field, including: pipe box section and separation section, pipe box section is equipped with symmetrically arranged upper tube sheet and lower tube sheet, baffles are arranged staggeredly between upper tube sheet and lower tube sheet, a plurality of vertically arranged heat transfer tube bundles are inserted between baffle, heat transfer tube bundle is located in the separation section and is sleeved with back cooling section, both sides of back cooling section are respectively communicated with pipe box section, one side of pipe box section is equipped with cold flow inlet, and the other side of pipe box section is equipped with cold flow outlet, cooling medium flows into pipe box section through cold flow inlet, one way along baffle and passes through cold flow outlet, another way along back cooling section recondenses heat transfer tube bundle and converges with one way along baffle and passes through cold flow outlet.This application has high condensing efficiency and good condensing effect, improves the use efficiency of equipment and increases the operating efficiency of heat exchange, improves the reliability of equipment, and increases the production performance.

The present invention provides an internal circulation hydrogenation reactor and a hydrogenation method for producing hydrogen peroxide by an anthraquinone process. The reactor comprises an outer cylinder and a middle cylinder arranged coaxially, and at least one inner cylinder arranged in the middle cylinder. Catalyst particles are filled in the inner cylinder. Anthraquinone working liquid and hydrogen enter the reactor from the bottom, contact and react in the inner cylinder. Driven by the working liquid and hydrogen, the catalyst and working liquid ascend to the top of the inner cylinder, then descend through the gap between the inner cylinder and the middle cylinder, and continue to undergo hydrogenation reaction under hydrogen supplementation. After reaching the bottom, part of the working liquid and catalyst flows back into the inner cylinder, and part of the working liquid ascends through the gap between the middle cylinder and the outer cylinder. Solid particles remaining in the working liquid precipitate during the upward movement of the liquid and flow back to the bottom of the inner cylinder, completing preliminary separation of solid and liquid. The separated working liquid is discharged through a liquid outlet at the top of the outer cylinder to form hydrogenated liquid. The reactor of the present invention adopts the form of an internal circulating fluidized bed to realize the anthraquinone hydrogenation reaction, which is conducive to the uniform mixing of the reaction materials and the catalyst, has good mass and heat transfer effects in the system, has few side reactions, and has high product quality. It can well solve the hot spot problem generated in the production process of the fixed bed hydrogenator.

This invention discloses a working solution for synthesizing hydrogen peroxide via the anthraquinone method, comprising a solvent and a working carrier. The solvent comprises aromatic hydrocarbons, diisobutylmethanol, and terephthalamide derivative A. Terephthalamide derivative A, by volume, has C9~C64... 10 The aromatic hydrocarbon comprises 30-95 parts, preferably 60-80 parts; the diisobutylmethanol comprises 2-20 parts, preferably 5-15 parts; and the terephthalamide derivative A comprises 5-30 parts, preferably 5-15 parts; the aromatic hydrocarbon is generally C9-C6. 10 Aromatic hydrocarbons; the working carrier is one or more of anthraquinone and its derivatives. This working solution exhibits excellent solubility and mass transfer capabilities for hydrogen, anthraquinone, and hydroanthraquinone, with a hydrogenation efficiency exceeding 13 g / L. It has low miscibility with water, good extraction and separation effects, and stable physicochemical properties. It can improve the production efficiency of the anthraquinone process for producing hydrogen peroxide and has promising prospects for industrial application.

The present invention relates to a process for the purification of an aqueous effluent (A) generated in the manufacture of hydrogen peroxide by the anthraquinone method, comprising the steps of a) adding to the aqueous effluent (A) an acid (C) and an organic solvent (B) to obtain a mixed medium (D); b) decanting the mixed medium (D) obtained in step a) to obtain 2 phases (E, F), wherein the aqueous phase (E) has a TOC content lower than the aqueous effluent (A) and the liquid organic phase (F) has a TOC content higher than the aqueous effluent (A); and c) entering the aqueous phase (E) obtained in step b) into a coalescer (4) to separate the aqueous phase (E) in 2 new phases, a first fluid (G) with a TOC content lower than the aqueous phase, and a second fluid (H) with a TOC content higher than the aqueous phase. Further, the present invention relates to an apparatus for the purification of an aqueous effluent generated in the manufacture of hydrogen peroxide by the anthraquinone method. Further, the present invention relates to the use of the inventive process in the manufacture of hydrogen peroxide by the anthraquinone method; and to a process for the manufacture of hydrogen peroxide and for the purification of an aqueous effluent (A) generated in said manufacture of hydrogen peroxide.

The present invention relates to the field of hydrogen peroxide production equipment, and particularly to an anthraquinone process hydrogen peroxide hydrogenation tower for protecting catalysts. The present invention provides such an anthraquinone process hydrogen peroxide hydrogenation tower for protecting catalysts, which includes an infusion assembly, a partition isolation mechanism, etc.; the infusion assembly is connected to the partition isolation mechanism. In the anthraquinone process hydrogen peroxide hydrogenation tower for protecting catalysts of the present invention, during the catalytic hydrogenation reaction of the entire processing liquid, the partition isolation mechanism sequentially separates the catalysts in the filter disc into partitions. The separated catalysts are inside the partition isolation mechanism, and the partition isolation mechanism individually performs an anti-adsorption treatment on them, realizing the catalytic hydrogenation reaction of the catalysts with the processing liquid and hydrogen. The anti-adsorption treatment work of the catalysts can be carried out synchronously. It solves the technical problem that in the catalyst maintenance treatment step, the entire hydrogenation tower needs to be shut down, and multiple cumbersome treatment steps are required to perform the anti-adsorption treatment on the catalysts, which affects the efficiency of the entire hydrogen peroxide production work.

The invention relates to an anthraquinone process (AO) for producing hydrogen peroxide, in which the hydrogenation step is carried out by means of a catalyst which contains, in addition to palladium (Pd), at least one other metal and an amorphous catalyst support.

The application discloses an ionic COF catalyst, a preparation method thereof and application of the catalyst in photocatalytic production of hydrogen peroxide. The catalyst is prepared from 2,4,6-triformylphloroglucinol and a phenanthridine monomer containing a double amino group through Schiff base condensation reaction under catalysis of acetic acid in a mixed solvent, and has an ionic covalent organic framework structure connected with beta-ketoenamine. The catalyst prepared by the application has irregular sheet-like agglomeration, a layered porous structure, a high specific surface area and a controllable ionic microenvironment, and can simultaneously strengthen oxygen adsorption activation and photogenerated carrier separation efficiency. When the catalyst is applied to photocatalytic production of hydrogen peroxide, efficient production of hydrogen peroxide can be realized under the conditions of pure water, visible light and no sacrificial agent, and the yield can reach 457 μM h ‑1 The application provides a green, mild and sustainable new solution to solve the problems of high energy consumption and high pollution of the traditional anthraquinone method and the bottleneck problem of the existing COF photocatalytic performance.

The invention relates to an anthraquinone process hydrogen peroxide production working solution alkali-free regeneration system and process, and belongs to the technical field of hydrogen peroxide production working solution alkali-free regeneration systems. The alkali-free regeneration system for the working solution produced by hydrogen peroxide through the anthraquinone process comprises a stock solution kettle, a filter press, an upper cleaning assembly, a lower cleaning assembly and a washing assembly, the upper cleaning assembly comprises an annular scraper, and the annular scraper can move from top to bottom to scrape attachments on the inner side wall of a cylindrical section; the lower cleaning assembly comprises a strip-shaped scraping plate, and the strip-shaped scraping plate can scrape away attachments on the inner side wall of the spherical section during rotation. The washing assembly is installed on the upper cleaning assembly and can spray cleaning liquid towards the inner side wall of the spherical section when moving to the bottom of the cylindrical section along with the upper cleaning assembly so as to wash and clean the inner side wall of the spherical section and the lower cleaning assembly. The raw liquid kettle can be automatically cleaned, the cleaning efficiency is improved, the cleaning effect is enhanced, and the cleaning process is safer.

The application discloses a ballast water sterilization reactor based on photocatalytic production of hydrogen peroxide and a use method thereof. Hydrogen peroxide water solution is obtained through a hydrogen peroxide production module and is transmitted to a mixing module to be mixed with untreated ballast water to obtain a mixed solution. Ocean microorganisms in the mixed solution are killed through a sterilization module to realize treatment of the ballast water. The ballast water sterilization reactor has simple structure and convenient operation. Only light source, water and oxygen are needed to safely and greenly produce hydrogen peroxide and apply the hydrogen peroxide to ship ballast water sterilization. The ballast water sterilization reactor solves the defects of high energy consumption, high transportation cost and unsuitability for use on ships of the traditional anthraquinone method.

The invention relates to the technical field of anthraquinone process hydrogen peroxide production, and discloses a method for reducing the total carbon content in an anthraquinone process hydrogen peroxide product, and the method comprises the following steps: in an oxidation system, introducing initial oxidation tail gas discharged by an oxidation tower into a separation unit, and carrying out cooling and separation treatment to obtain first aromatic hydrocarbon, second aromatic hydrocarbon and third aromatic hydrocarbon; circulating the first aromatic hydrocarbon back to the hydrogenation system and / or the oxidation system to be reused as a circulating working solution; and circulating the second aromatic hydrocarbon and / or the third aromatic hydrocarbon back to the hydrogen peroxide purification system to be reused as the extraction agent. The hydrogen peroxide production method provided by the invention is high in purification efficiency and low in cost, can maintain stable aromatic hydrocarbon mass fraction of a working solution system, and can further reduce the total carbon content of hydrogen peroxide.

The present invention discloses a fiber membrane regeneration tower for producing hydrogen peroxide by an anthraquinone process, comprising a tower body and a tower kettle. The tower body is vertical, the tower kettle is horizontal, the tower body has an opening at the bottom, the tower body stands on the tower kettle, and the tower wall of the tower body extends deep into the tower kettle; the tower body is divided into an upper section, a middle section, and a lower section from top to bottom, the upper section is filled with oleophilic fiber filaments, the middle section is filled with hydrophilic fiber filaments, and the lower section is filled with hydrophobic fiber filaments; the upper part of the upper section of the tower body is provided with a working liquid inlet and a hydrogenation liquid inlet, the top of the middle section of the tower body is provided with an alkali liquid inlet; the bottom of the tower kettle is provided with an alkali liquid outlet, and the top is provided with an oil phase outlet. The fiber membrane regeneration tower achieves the effects of stable liquid film, efficient mixing, good regeneration effect, rapid separation, etc. by filling the upper section with oleophilic fiber filaments, the middle section with hydrophilic fiber filaments, and the lower section with hydrophobic fiber filaments.

The invention discloses an eggshell type catalyst for producing hydrogen peroxide through anthraquinone hydrogenation and a preparation method of the eggshell type catalyst, and belongs to the technical field of catalysts. Compared with the traditional uniform palladium catalyst, the active center of the eggshell-type palladium catalyst is intensively dispersed on the surface of the catalyst, so that the internal diffusion limitation is fundamentally overcome, and the utilization rate and the reaction selectivity of the noble metal are remarkably improved. The particle size equivalent diameter of the catalyst prepared by the method is 2mm, the specific surface area of the catalyst is 200m < 2 > / g, the pore volume is 0.3-0.9 cm < 3 > / g, the dispersion degree of palladium is 56%, and the strength of the catalyst is 80N / mm. The preparation method of the eggshell type catalyst for producing hydrogen peroxide through anthraquinone hydrogenation is simple and easy to operate, low in energy consumption and convenient for large-scale production and use, and has the advantage of promoting the progress of an anthraquinone process hydrogen peroxide production technology.

The application discloses a solvent system for working solution of hydrogen peroxide produced by an anthraquinone method, which comprises the following components: an imide derivative A and an aromatic hydrocarbon, wherein the imide derivative A is 5-60 parts, preferably 10-50 parts, and more preferably 15-35 parts, and the aromatic hydrocarbon is 30-95 parts, preferably 60-80 parts, in volume fraction. The solvent system for working solution of hydrogen peroxide produced by the anthraquinone method has good solubility to anthraquinone and hydrogen anthraquinone, low mutual solubility with water, stable physical and chemical properties, meets the use requirements of the anthraquinone method, can significantly improve the production efficiency of the anthraquinone method for producing hydrogen peroxide, and has a good industrial application prospect.

The present invention provides a hydrogenation reactor and hydrogenation method for producing hydrogen peroxide using the anthraquinone process. The reactor comprises an outer cylinder and at least one inner cylinder. Catalyst particles are loaded into the inner cylinder. Anthraquinone working liquid enters the reactor through a liquid feed port at the top of the inner cylinder. Hydrogen enters the inner cylinder through a gas distribution plate at the bottom gas inlet. Driven by the gas, the catalyst particles flow in a fluidized state within the inner cylinder. The hydrogen and working liquid undergo a catalytic reaction within the inner cylinder. The gas is discharged through an exhaust port at the top. The reacted working liquid is deflected at the bottom of the inner cylinder and then flows between the inner and outer cylinders, where precipitation and separation of the catalyst occur. The working liquid is discharged through a liquid discharge port at the top to form a hydrogenated liquid. The present invention achieves a fluidized bed-like structure, which facilitates uniform mixing of the reactants and the catalyst. The system has good mass and heat transfer effects, minimizes side reactions, and achieves high product quality. This effectively addresses the hotspot problem that occurs during the production process of fixed-bed hydrogenation reactors.

The invention discloses a D-pi-A type polymer based on a bisindeno-anthrazoline compound, a preparation method of the D-pi-A type polymer, and hydrogen peroxide produced by photocatalysis of the D-pi-A type polymer. The polymer is prepared through Suzuki coupling by taking a halogenated bisindeno-anthrazoline compound, 1, 4-phenylenediboronic acid and a halogenated donor molecule as monomers, the preparation method is simple, and the polymer has good absorption in a visible light range, has a short-range ordered structure and is beneficial to carrier separation and transmission. The D-pi-A type polymer based on the bisindeno-anthrazoline compound can catalytically synthesize hydrogen peroxide without a sacrificial agent under visible light irradiation and in an air atmosphere, and is excellent in performance. Compared with high energy consumption and multiple pollution defects of a traditional anthraquinone method and dependence on complex equipment of an electro-catalysis method, green synthesis of hydrogen peroxide is achieved only through water, air and light energy, the method has the comprehensive advantages of being high in activity, low in cost and environmentally friendly, and a new scheme is provided for the fields of clean energy and green chemical industry.