225results about How to "Increase reaction rate" patented technology

The invention discloses high-purity oxamide with concentrated particle size and spherical morphology, a preparation method of the high-purity oxamide and application of the high-purity oxamide in preparation of a slow-release fertilizer, and belongs to the technical field of oxamide synthesis and application. The method comprises the following steps: mixing an ammonia-alcohol solution and an alcohol ester solution, conveying the mixed solution into a series tubular reactor for reaction, and then conveying the mixed solution into a parallel tubular reactor for reaction after pressure stabilization and flow equalization to obtain a reaction solution containing oxamide; performing flash evaporation on the reaction liquid to obtain flash evaporation liquid and flash evaporation gas, and performing solid-liquid separation on the flash evaporation liquid to obtain solid oxamide and filtrate; and drying the solid oxamide to obtain the oxamide. The method realizes high conversion rate and high purity, and the product has ultrafine particle size distribution. The purity of the prepared oxamide is greater than or equal to 99%, the D50 particle size is concentrated to 50 + / -15 microns, the spherical morphology is uniform, the release is stable, and the oxamide has a very good effect in preparation of long-acting slow-release fertilizers and combustion inhibitors and research on the nitrogen utilization rate.

The present invention proposes a method and use for stabilizing a simple agglomerate for pH and salt and with adjustable size. In phosphoric acid buffer solutions with different salt concentrations and pH values, the polyacrylic acid hydroxypropyl group condensation body has specific stability; hydrophobic thermal response blocks are introduced into a hydroxypropyl acrylate monomer through reversible addition-fragmentation chain transfer polymerization to regulate and control the size of a condensation body, and a phase separation behavior is shown at different temperatures; a hydrophobic block without thermal response is introduced to regulate and control the size of the aggregate, and no thermal response behavior is shown. Continuous regulation and control of the size of the aggregate from the micron level to the nano level are achieved, and the requirements of different application scenes are met. The hydroxypropyl polyacrylate condensation body can be used for packaging various dyes and drugs; high-efficiency enzyme protection is achieved, formed aggregates can protect glucose oxidase, and the retention rate of enzyme activity reaches 85% or above after treatment is conducted for 3 hours at 60 DEG C; as a micro-reactor for the reaction of generating p-nitrobenzaldehyde phenylhydrazone from p-nitrobenzaldehyde and phenylhydrazine, the reaction rate is greatly improved.

The utility model relates to the technical field of combustion equipment, and provides a low-nitrogen combustion device for flue gas recirculation, which comprises a circulation frame, a gas delivery pump and a secondary gas mixing mechanism, the circulation frame is provided with a venturi mixing tube group, the venturi mixing tube group is communicated with a uniform gas delivery mechanism for flue gas delivery, the gas delivery pump is mounted on the circulation frame, and the secondary gas mixing mechanism is mounted on the circulation frame. The gas outlet end of the gas conveying pump is communicated with one end of the Venturi mixing tube set through a gas conveying bent tube, and the secondary gas mixing mechanism is installed on the circulation frame, arranged in the Venturi mixing tube set in a penetrating mode and used for conducting secondary acceleration and mixing on gas in the Venturi mixing tube set. The low-nitrogen combustion device for flue gas recirculation solves the problem that in the prior art, when a low-nitrogen combustion device for flue gas recirculation circulates flue gas, the mixing efficiency of the flue gas and air is poor.

The utility model discloses rapid curing equipment for a ceramic surface microstructure anti-skid and wear-resistant layer, which comprises a box body and a fixed gear ring arranged below the inner wall of the box body, and further comprises a transmission mechanism, the transmission mechanism comprises a movable supporting inner ring arranged in the box body, moving rollers are uniformly mounted at the bottom of the movable supporting inner ring, and the moving rollers are fixed on the box body. An inner gear ring is arranged on the inner wall of the movable supporting inner ring, gears are installed on the top of the movable supporting inner ring through evenly-arranged movable shafts, and a tray with a groove is arranged on the top of each gear. The inner gear ring is meshed with the driving gear, the movable supporting inner ring drives the tray to rotate in the box body, and meanwhile the tray rotates under the action of the gear and the fixed gear ring. The dual-rotation mechanism ensures that each surface of the ceramic workpiece can be uniformly irradiated by ultraviolet rays and heated by microwaves in the conveying process, so that the curing quality problem caused by non-uniform heating in the traditional curing equipment is avoided.

This invention relates to the field of sodium ion electronics technology, specifically disclosing a sodium chromite preparation apparatus and method based on a mechanochemical method. The apparatus includes a base, on which a drive disk is rotatably mounted. A main ball mill jar is rotatably mounted in the center of the drive disk, and two symmetrically arranged auxiliary ball mill jars are rotatably mounted on the drive disk. This invention utilizes the synergistic effect of the main and auxiliary ball mill jars, and uses argon gas as a protective gas carrier to continuously flow, dynamically carrying the refined chromium oxide and sodium carbonate from the auxiliary ball mill jars into the main ball mill jar. This achieves a continuous process of raw material pretreatment and mechanochemical reaction, avoiding material accumulation, ensuring real-time contact of reactants, and improving the reaction rate. Furthermore, the product is sodium chromite powder produced by high-energy ball milling, eliminating the need for mechanical crushing and secondary ball milling, significantly shortening the production cycle and improving production efficiency.

The utility model relates to the technical field of bubble generator, and disclose a kind of suspended underwater micro-nano bubble generator, including adjustable support mechanism, bubble generating mechanism and external protection mechanism;Bubble generating mechanism is by multistage water pump, inlet pipe, one-way water inlet valve, connecting pump, transport pump, high-speed rotary cutting nanometer bubble pump, conveying pipe and aeration head etc., and is connected by thread seal sleeve to realize pipeline sealing connection.Mainframe box is equipped with buoy, internal and external pressure monitoring sensor, can realize underwater suspension and pressure real-time monitoring.Adjustable support mechanism can adjust equipment installation height, and external protection mechanism is realized waterproof anti-collision protection by protective shell, sealing washer and protective fence.The device adopts multistage water pump to match double high-speed rotary cutting nanometer bubble pump, can accurately control fluid flow rate and pressure, generates bubble particle size uniform, dissolved oxygen efficiency is high, with the characteristics of intelligent control, anticorrosive durable, protective, suitable for water purification, aquatic ecological restoration etc.

The application relates to the technical field of catalysts, and discloses a nano magnesium oxide material and a preparation method and application thereof. The nano magnesium oxide material has a porous structure, wherein the particle size of the nano magnesium oxide is 20-200 nm; and the pore size of the porous structure is 5-45 nm. The classical nucleation growth process of the magnesium oxide is directionally adjusted in a weak alkaline nucleation system, and then the nano magnesium oxide with a controllable grain size distribution is obtained. The nano magnesium oxide material has good catalytic activity in the synthesis of propylene carbonate from CO2 and an epoxide under the conditions of no solvent and no auxiliary agent, and the catalyst is not deactivated after multiple uses, and has good stability.

The invention provides a method for continuously and efficiently synthesizing 2, 6-diamino piperazine-1-oxide, which comprises the following steps: S1, preparing an N-nitroso iminodiacetonitrile solution at room temperature, and stirring and dissolving for 5 minutes; s2, sequentially adding hydroxylamine salt and alkali into a solvent, stirring at room temperature for 10-15 minutes for pre-dissolving, adding a proper amount of metal salt catalyst into the obtained solution, and continuously stirring for 5-10 minutes; s3, exhausting the continuous tubular reactor by using a hydroxylamine solution until the continuous tubular reactor is full of the solution; s4, feeding the N-nitrosoiminodiacetonitrile solution and the hydroxylamine solution into a continuous tubular reactor through a mixer according to a certain proportion by adopting a delivery pump, and optimizing the flow velocity and temperature of the reaction solution and the pressure in the continuous tubular reactor; and S5, enabling the reaction liquid to flow out from an outlet of the continuous tubular reactor, performing suction filtration, washing a filter cake with an alcoholic solution, and drying. The method can obviously improve the reaction rate, reduce the generation of impurities and improve the production efficiency.

The invention discloses a method for deeply recovering phosphorus and vanadium from molten iron containing phosphorus and vanadium, which comprises the following steps: treating the molten iron containing phosphorus and vanadium by adopting an oxygen blowing method, in the oxygen blowing method, directly blowing mixed gas into the molten iron by utilizing a spray gun, the volume concentration of the oxidizing gas is 18%-50%. The method has the advantages of improving the recovery rate of phosphorus and vanadium, reducing the smoke amount and the like, and also has the characteristics of low cost, short process, environmental friendliness, less carbon emission, high heat utilization rate, full utilization of resources and the like.

This invention discloses a carbon-based composite catalytic material, its preparation method, and its applications. The invention employs a one-step carbonization process involving molten salt confinement, a non-urea nitrogen source, and no ball milling: a dinuclear iron precursor, nitrogen-containing organic matter (as both a non-urea nitrogen source and a carbon source), ZnCl2, and a molten salt system are mixed. After high-temperature pyrolysis under an inert atmosphere, the mixture is sequentially washed with hot water to dissolve the molten salt, followed by washing with HCl solution and drying. The entire process eliminates the need for complex mechanical treatments such as ball milling, simplifying the steps and providing milder conditions, making it more suitable for scale-up preparation and engineering applications. The above-mentioned carbon-based composite catalytic material is applied to the degradation of chlorinated organic pollutants in soil, particularly in conjunction with persulfate oxidants to construct an advanced oxidation system. The highly coordinated dinuclear M2N6 reaction center efficiently activates persulfate, generating sulfate radicals, hydroxyl radicals, and / or non-radical active species, achieving rapid degradation of recalcitrant chlorinated organic pollutants.

The utility model discloses polycrystalline silicon and organic silicon high boiling pyrolysis reactor system of promoting gas solid liquid three -phase mass transfer relates to chemical industry technical field. The polycrystalline silicon and organic silicon high boiling pyrolysis reactor system of promoting gas solid liquid three -phase mass transfer, including reactor main part, catalyst stacking unit, liquid distributor main part and gas distribution unit. The polycrystalline silicon and organic silicon high boiling pyrolysis reactor system of promoting gas solid liquid three -phase mass transfer, gas catalyst passes into the exhaust pipe through the communication groove, and then gas catalyst is evenly sprayed into the catalytic filler of loading net cylinder through the spray head, and the liquid raw material is evenly flowed through the catalytic filler of loading net cylinder through the liquid distribution port, so that the gas and solid catalyst are mixed in the loading net cylinder, the reaction rate is improved, and the uniformity of mixing is ensured, the mixing effect of liquid raw material and gas is improved, and the reaction and product generation are accelerated.

The utility model discloses a naphthalene water reducer neutralization reaction device capable of automatically adding alkali, and belongs to the technical field of water reducer production equipment. The naphthalene water reducer neutralization reaction device with the automatic alkali adding function comprises a reaction tank, a tank cover is installed at the top end of the reaction tank, four supporting columns are installed on the outer side of the bottom end of the reaction tank, a cooling mechanism is installed on the outer side of the reaction tank, an alkali liquor tank is arranged on one side of the reaction tank, a ring pipe is installed on the inner side of the reaction tank, and a plurality of alkali liquor spray heads are installed at the bottom end of the ring pipe. The top end of the alkali liquor tank is provided with a liquor feeding mechanism for supplying liquor to the annular pipe, the top end of the annular pipe is provided with a cleaning mechanism for cleaning the alkali liquor spray head, the reaction tank is internally provided with a mixing mechanism, the bottom end of the reaction tank is provided with a liquor outlet pipe, and one end of the liquor outlet pipe is provided with a valve. The neutralization reaction efficiency is improved, and the practical value is relatively high.

The invention relates to a non-ferrous smelting waste acid wastewater vulcanization reaction device, and belongs to the field of non-ferrous smelting waste acid wastewater treatment. The device comprises a reaction tank main body, and a circulating tank, a flow baffle, a medicament adding system and a stirring device which are arranged in the reaction tank main body, the recycling device is arranged at the upper part of the reaction tank main body; the wastewater inlet system and the liquid outlet pipe are arranged outside the reaction tank main body; the wastewater inlet system is divided into two paths, the first path is communicated with the reaction tank main body, the second path is communicated with the top of the recycling device, and wastewater is used as spraying liquid to be distributed in the recycling device; the liquid outlet pipe is communicated with the upper part of the circulating groove; and an outlet of the recycling device is connected with a pipeline of the deinsectization tower. Compared with the prior art, the device is compact in structure, a traditional vulcanization reaction device is improved, the vulcanization efficiency is improved, the dosage of chemicals is reduced, and good environmental protection and economic benefits are achieved.

The utility model discloses a silicon carbide processing device capable of fully pickling, which comprises a fixed bottom plate, the upper end of the fixed bottom plate is fixedly connected with a U-shaped fixed frame, and the lower inner wall of the U-shaped fixed frame is fixedly connected with a pickling cylinder; the lifting guide rails are fixedly connected to the side inner wall of the U-shaped fixing frame and symmetrically distributed at the left end and the right end of the U-shaped fixing frame, reversible motors are fixedly connected to the interiors of the lifting guide rails and located at the lower ends of the lifting guide rails, the output ends of the reversible motors are fixedly connected with vertical screws, and the vertical screws are in threaded connection with lifting sliding blocks; a lifting type pickling mechanism is composed of a U-shaped fixing frame, a pickling cylinder, a placing cylinder, a communicating hole, a fixing vertical plate, a lifting guide rail, a reversible motor, a vertical screw rod and a lifting sliding block, the placing cylinder can do high-frequency up-down reciprocating motion in the pickling cylinder in the pickling process, flowing of hydrochloric acid can be increased so as to improve the reaction rate, and the treatment efficiency of the device is improved.

The invention relates to a soil microorganism high-efficiency water purification filter material and a preparation process thereof, and aims to solve the problems of low removal efficiency, high cost, easiness in secondary pollution, insufficient affinity with soil microorganisms and the like of the existing microorganism filter material. The filter material is prepared by taking volcanic rock, activated carbon, bentonite and modified cellulose as main raw materials, combining the main raw materials according to a specific ratio, preparing porous particles by virtue of processes such as calcining, activating, mixing, granulating and sintering, and finally loading the porous particles by virtue of a microbial bacterial liquid. The product has a large specific surface area, good adsorption performance and high chemical stability, and can provide an excellent adhesion and growth environment for soil microorganisms. Experiments prove that the filter material can significantly improve the removal efficiency of pollutants such as COD, ammonia nitrogen and total phosphorus in sewage, and the filter material has the advantages of easily available raw materials, low cost and environmental friendliness, and is suitable for the fields of sewage treatment, ecological restoration and the like.

This invention belongs to the field of catalytic materials technology, specifically relating to a catalytic system and its application, and a method for preparing ester compounds. The catalytic system provided by this invention includes a main catalyst and a co-catalyst; the main catalyst has the structure shown in formula (I), and the co-catalyst has the structure shown in formula (II) or (III). This invention uses an aromatic aldehyde with an ortho-Lewis acid center as the main catalyst and an organic hydrogen bond donor as the co-catalyst to jointly form the catalytic system. The main catalyst promotes the formation of the key Criegee intermediate through Lewis acid interaction; the co-catalyst stabilizes the rearrangement transition state of this intermediate through non-covalent hydrogen bond interactions. This synergistic effect significantly improves the overall reaction rate, achieving high selectivity and high yield synthesis of ester compounds at room temperature and low pressure when using oxygen as the oxidant.

The invention discloses a preparation method of ethylhexyl palmitate, and relates to the technical field of ethylhexyl palmitate. According to the method, firstly, isooctanol is gasified and then introduced into a methyl palmitate solution, ethylhexyl palmitate is prepared through transesterification, gaseous feeding can improve the instantaneous concentration of alcohol in a liquid phase, the reaction is promoted to be carried out in the positive direction, the reaction rate is increased, meanwhile, methanol generated through the transesterification method can be gasified and taken out of a system, and the yield of ethylhexyl palmitate is increased. Forward proceeding of the reaction is further promoted, so that the reaction is more thorough; secondly, chromium salt is used as a metal source precursor and a 2-sulfo-4, 4 '-biphenyldicarboxylic acid ligand to synthesize a catalyst, a biphenyl group in the ligand provides rigid and hydrophobic large pore channels and provides a local high-concentration reaction environment, gaseous isooctanol can be easily diffused into the pore channels of the catalyst and is in contact with enriched methyl palmitate, and the reaction efficiency is improved; and sulfonic acid groups uniformly distributed in the ligand serve as solid superacid, strong acid sites are provided, and the production efficiency is improved.

The application discloses a phosphorescent on-off type biological orthogonal iridium complex probe and a preparation and application thereof, and belongs to the technical field of organic photoelectric materials. A benz[h]quinoline-5,6-dione derivative is used as a C^N ligand, the C^N ligand is subjected to a coordination reaction with an iridium trichloride trihydrate to obtain a cyclometalated iridium chloro-bridged dimer, and then the cyclometalated iridium chloro-bridged dimer is subjected to a reaction with an N^N ligand to obtain the iridium complex probe. After the probe is reacted with a biological orthogonal unit, angelica lactone, the excited state energy level of the complex is changed, the photophysical property of the complex is influenced, the phosphorescence is turned on from nothing, and the effect of phosphorescence on-off is achieved. The phosphorescence on-off characteristic makes the probe before and after the reaction with the angelica lactone present obvious luminescent signal ratios. The characteristic can maximally reduce background signal interference, is convenient for cell imaging and biomolecular recognition, and can provide a new train of thought for developing a novel phosphorescent on-off type biological orthogonal material. The application has a good application prospect in the field of biological marking and imaging.

The utility model belongs to industrial wastewater treatment technical field discloses a kind of Fenton oxidation pond packing shelf and Fenton reaction pond device, including packing shelf body and at least two hanging material layers, and packing shelf body includes upper shelf body and lower shelf body, and both are detachably connected along vertical direction, and upper shelf body top is provided with lifting connection structure;At least two hanging material layers are respectively arranged on upper shelf body and lower shelf body, and each layer hanging material layer includes multiple hanging material cross beams that are arranged in parallel along horizontal interval, and multiple filter bags are detachably and interval hung along the length direction of each hanging material cross beam, and filter bag interior is filled with zero-valent iron reagent, and raw water in oxidation pond can contact reaction with zero-valent iron reagent in its interior through the small hole of filter bag.The utility model effectively improves the contact efficiency of reaction reagent, reduces ferrous sulfate consumption, makes reaction process more sufficient, accelerates reaction rate, improves treatment effect;Meanwhile, it is convenient to quickly replace and supplement reaction reagent on packing shelf, and operation is simple.

This invention discloses a method for preparing pharmaceutical-grade hydrogenated palm oil glyceride. The steps are as follows: stearic acid, palmitic acid, and glycerol are melted, a catalyst is added, vacuum is applied, and the mixture is heated to react; the temperature is lowered, pharmaceutical-grade activated clay is added, and the mixture is stirred; the material is transferred to a pressure vessel; the outlet of the pressure vessel is opened, and the mixture is filtered to obtain crude hydrogenated palm oil glyceride, which is then fed into the material storage tank of a three-stage molecular distillation apparatus; the process parameters of the three-stage molecular distillation apparatus are set at a temperature of 160℃~250℃ and a pressure ≤30Pa, and the crude hydrogenated palm oil glyceride is forced into the cavity of the three-stage molecular distillation apparatus through a vacuum feeder, the feed flow rate is controlled, and the collected heavy component, pure hydrogenated palm oil glyceride, is transported through a pipeline to a rotary drum condenser crystallizer and slicing machine to obtain pharmaceutical-grade hydrogenated palm oil glyceride. This invention is simple to operate, uses readily available raw materials, has a high production yield, is environmentally friendly and pollution-free, and produces a high-purity product that meets pharmaceutical requirements.

The invention discloses a preparation method of 17[alpha]-hydroxyprogesterone, wherein the preparation method comprises the steps: refining: step 1, dissolving 1 W of a crude product into a mixed solution of 4-5 V dichloromethane and 6-8 V ethanol, and heating to dissolve the crude product; step 2, weighing activated carbon exceeding a preset amount, then putting the activated carbon into a drying device for drying, controlling the drying temperature to be 60-85 DEG C, and controlling the drying time to be 10-15 minutes; and step 3, taking out the activated carbon dried in the step 2, and then placing the activated carbon in a grinding device for fine grinding. According to the scheme, activated carbon in the refining process in an original scheme is finely processed and then added, so that the reaction rate is effectively increased, the time of reflux decoloration is shortened, large-scale production and processing are facilitated, and the production cost is further reduced.

This invention discloses a method for synthesizing a mordenite molecular sieve-encapsulated metal catalyst for the synthesis of ester compounds, comprising the following steps: 1) mixing a water-soluble metal salt sequentially with an amine ligand and an alkali metal hydroxide to obtain a preliminary mixture solution; 2) mixing the preliminary mixture solution sequentially with an aluminum source and a silicon source to obtain a gel; 3) crystallizing the gel at 160–180 °C, cooling after crystallization, and separating to obtain an initial solid; 4) drying and calcining the obtained initial solid to obtain a preliminary molecular sieve; 5) placing the preliminary molecular sieve in an inorganic ammonium salt solution for ion exchange, separating the reactants after ion exchange to obtain a solid, drying and calcining the solid to obtain a mordenite molecular sieve-encapsulated metal catalyst for the synthesis of ester compounds. The catalyst obtained by this synthesis method can be used for the carbonylation of dimethyl ether to produce methyl acetate, exhibiting a relatively fast reaction rate while maintaining a high conversion rate of dimethyl ether.

This invention provides a method for synthesizing dimethyl carbonate, belonging to the field of carbonate compound synthesis technology. The synthesis method of this invention does not require high temperature and high pressure conditions, and can be carried out at room temperature and pressure, significantly reducing energy consumption and equipment requirements. By coupling the reduction and oxidation reactions of photoelectrochemical carbon dioxide conversion, the synthesis energy barrier of dimethyl carbonate is lowered, improving energy utilization efficiency. Using greenhouse gas carbon dioxide as the main raw material, waste resource utilization is achieved, and the energy used is clean energy such as solar or electrical energy, avoiding pollution at the source. This invention couples the carbon dioxide conversion and dimethyl carbonate synthesis steps, realizing the recycling of the reactant methanol within the system, simplifying the process flow. The combined use of light and electrical energy produces a synergistic effect, improving the reaction rate and the selectivity of dimethyl carbonate.

This invention belongs to the field of inorganic catalyst materials and organic pollutant degradation technology, specifically relating to a Cu@ITGs confined microsphere catalytic material based on iron tailings, its preparation method, and its application in degrading organic matter. The method includes the following steps: mixing activated iron tailings powder and meta-high terephthalic acid to obtain a mixed dry powder; obtaining a composite alkali activator; weighing copper nitrate particles, dispersing them in ethanolamine for complexation, and slowly adding them to the composite alkali activator to obtain a mixed solution; adding the mixed dry powder to the mixed solution to synthesize a gel slurry; dripping the obtained gel slurry into polyethylene glycol-800 to form microspheres; and after fully curing and drying the microspheres, gradient calcining under a N2 atmosphere to obtain the confined catalytic material Cu@ITGs. This invention uses bulk industrial solid waste as the main raw material to prepare a multifunctional catalytic material with both high catalytic activity and excellent stability for use in wastewater treatment, realizing "waste-to-waste" treatment and high-value-added resource utilization of solid waste.

The application belongs to the technical field of composite hydrogen storage, in particular to an improved composite hydrogen storage device for hydrogen storage and a use method thereof, which comprises a hydrogen storage tank body and a solid-state hydrogen storage module arranged in the hydrogen storage tank body, the solid-state hydrogen storage module is filled with a hydrogen storage alloy, and an end interface for hydrogen charging and discharging is arranged on an end cover of the hydrogen storage tank body; the solid-state hydrogen storage module comprises a first hydrogen storage unit and a second hydrogen storage unit arranged axially along the hydrogen storage tank body, and a filtering unit arranged between the end interface and the first hydrogen storage unit; the filtering unit is arranged to be slidable, and the pressure difference between the high-pressure area naturally formed between the end interface and the first hydrogen storage unit and the low-pressure area at the bottom of the tank body during hydrogen charging is used as a driving force, during hydrogen charging, the pressure difference drives the filter screen body to avoid the main flow field, thereby reducing the airflow resistance and ensuring high-speed and high-efficiency hydrogen charging.

The utility model relates to a simple hair loss detection box belongs to medical detection technical field. The simple hair loss detection box, including storage box A, storage box B, reaction box, filter screen and limit ring, storage box A is equipped with storage box B and reaction box in proper order on, the upper end face of reaction box is equipped with heating warm and is pasted, the lower end inside of reaction box is equipped with filter screen through limit ring. The simple hair loss detection box, compact structure, clever design, not only can store reaction liquid medicine and reaction powder can also carry out filtration and heating reaction thus solved the existing existing hair loss reagent box lacks the problem of long time of filtering and reaction, especially suitable for the need of hair loss detection use.

This invention discloses a gas-liquid split-flow micro / nano porous electrode device, comprising a U-shaped hollow substrate and a multi-level micro / nano pore directional flow channel system disposed on its wall. The directional flow channel system is divided into a nitrogen transport channel group on the inner wall side and an electrolyte transport channel group on the outer wall side. Both groups of channels are composed of several micropore arrays arranged in a staggered manner along the substrate wall thickness direction. The nitrogen transport channel group adopts a gradually expanding structure, allowing nitrogen to enter from the small-diameter end on the N2 main inlet pressure stabilizing chamber side and exit from the large-diameter end on the inner wall catalyst layer side, achieving directional enrichment and efficient transport of nitrogen. The electrolyte transport channel group adopts a gradually contracting structure, allowing the electrolyte to enter from the large-diameter end on the external environment side and exit from the small-diameter end on the inner wall catalyst layer side, suppressing excessive proton transport to the catalyst layer interface. This invention, through spatial isolation and independent control, simultaneously solves the problems of limited nitrogen mass transfer and severe hydrogen evolution side reactions in traditional electrodes, significantly improving ammonia yield and Faraday efficiency.

The application relates to application of a solid acid catalytic catalyst in preparation of p-aminophenol through nitrobenzene hydrogenation. The application comprises the following steps: adding a solid acid catalyst, cetyltrimethylammonium bromide, deionized water and nitrobenzene into a high-pressure reactor, and reacting under magnetic stirring for 0-24 hours at 25-150 DEG C to obtain the product p-aminophenol. The activated carbon for preparing the solid acid catalyst is coconut shell activated carbon, the series of activated carbon has the advantages of large specific surface area, rich micropores and strong adsorption capacity, and the coconut shell activated carbon solid acid with different acidities is prepared to catalyze the nitrobenzene hydrogenation reaction. The application avoids using traditional liquid acid sulfuric acid to provide the acidic active sites required by the reaction, greatly alleviates the problems of equipment corrosion, environmental unfriendliness, catalyst and product separation difficulty and the like. The catalyst used has good performance, the conversion rate of nitrobenzene is up to 100%, and the yield of p-aminophenol is up to 81.17%.

The application provides a green, low-carbon and rapid chromium-containing wastewater treatment method, which is improved on the basis of traditional biogas residue and ferrous sulfate treatment of chromium-containing wastewater, introduces short-term micro-aeration technology, and produces unexpected results, which not only treats the chromium-containing wastewater in a green and low-carbon way, but also greatly speeds up the reaction progress. In the process, a certain thickness of biogas residue sediment layer is formed in the biochemical reaction tank, then ferrous sulfate is added, then chromium-containing wastewater and biogas liquid are added, and after standing for a period of time, micro-aeration is carried out, which accelerates the biochemical reduction of Cr(VI) in the chromium-containing wastewater, promotes the activity of microorganisms, and saves resources.

The invention relates to a synthetic method of an indoloquinazolinone compound. The synthetic method comprises the following steps: reacting 2-aminoacetophenone with aryl isocyanate under the catalytic action of a palladium complex to obtain the indoloquinazolinone compound, wherein the palladium complex is an N, N-coordinated palladium complex containing a meta-carborane ligand. The preparation process of the palladium complex comprises the following steps: adding an n-BuLi solution into a meta-carborane solution to carry out a deprotonation reaction, then adding 3-chloromethylpyridine to carry out a nucleophilic substitution reaction, finally adding Pd (OAc) 2 to carry out a coordination reaction to obtain a palladium complex head product, and carrying out post-treatment to obtain the palladium complex product. Compared with the prior art, the method disclosed by the invention has the advantages of good adaptability, high catalytic efficiency, few byproducts, mild reaction conditions, lower cost, easiness in product separation, no generation of a large amount of waste residues and the like.