22results about How to "Increase mass transfer rate" patented technology

The invention discloses a triazine desulfurizer and a preparation method thereof, and belongs to the technical field of gas purification. The triazine desulfurizer is mainly prepared from the following raw materials in percentage by weight: 20 to 50 weight percent of triazine derivative, 10 to 15 weight percent of sterically hindered amine, 3 to 7 weight percent of stabilizer, 1 to 3 weight percent of synergist, 0.5 to 1.5 weight percent of penetrant, 0.5 to 1.5 weight percent of inhibitor, 1 to 2 weight percent of additive and the balance of water, the preparation method of the triazine derivative comprises the following steps: adding 2-(diphenylphosphino) ethylamine into a toluene solvent, adding a paraformaldehyde aqueous solution in batches under a stirring condition, and reacting for 2-8 hours to obtain the triazine derivative. According to the triazine desulfurizer and the preparation method thereof provided by the invention, the triazine derivative and the sterically hindered amine are taken as a host, and the stabilizer, the synergist, the penetrant, the inhibitor and the assistant are compounded, so that the scaling trend of the triazine desulfurizer in an oil and gas well can be slowed down, the dissolution rate of hydrogen sulfide and the mass transfer rate in a solution are increased, and the desulfurization reaction is promoted; the desulfurization effect and the desulfurization rate are improved, and meanwhile, a very good scale inhibition effect is also achieved.

The application belongs to the technical field of natural substance separation and extraction, and particularly relates to a kind of Haematococcus pluvialis multi-product cascade separation method based on eutectic solvent sequential extraction and enzyme membrane reactor coupling, comprising the following steps: (1) cell wall weakening pretreatment step; (2) water-soluble component extraction step; (3) pigment component extraction step; (4) astaxanthin extraction step; (5) enzyme conversion step. Through the synergistic effect of eutectic solvent sequential extraction and enzyme membrane reactor, efficient, green and continuous cascade separation of water-soluble components, pigments, astaxanthin and xylo-oligosaccharides in Haematococcus pluvialis is realized, and product purity and resource utilization are improved.

The utility model discloses a multilayer combined filter structure of desulfurization dust remover, including tower body, at least one layer composite filler layer is arranged in the tower body, the composite filler layer is multilayer structure, and the regular shaped filler area, transition flow guide area, bulk packing area and support grating from top to bottom include successively, the regular shaped filler area and bulk packing area outside all are provided with fixed frame, the regular shaped filler area and bulk packing area are filled in the corresponding fixed frame respectively, through the high specific surface area of bulk packing, can effectively strengthen gas liquid contact in bulk packing area, improve mass transfer rate, and the low resistance characteristic of regular shaped filler can avoid partial pressure drop surge in regular shaped filler area, realizes the balance of desulfurization efficiency and energy consumption, reduces operating energy consumption while guaranteeing desulfurization effect.

The utility model relates to primary amine production technical field, concretely is primary amine rectification purification system. Primary amine rectification purification system, including storage tank, storage tank is connected with rectifying column through heat exchanger, and the bottom of rectifying column is connected with membrane evaporator through pipeline, and the inside of rectifying column is equipped with primary condenser, and rectifying column is connected with gas -liquid separation tank through secondary condenser. The system is through the additional membrane evaporator, and the liquid phase material of rectifying column bottom discharge is handled again. The unique structure design of membrane evaporator makes it can distribute liquid material into film shape evenly, greatly increases evaporation area, strengthens mass transfer process, further separates the primary amine and impurity remaining in liquid phase, significantly improves the purity of product, satisfies the strict requirement of high -end application field to primary amine high purity.

Embodiments of the present specification provide a crystal growth apparatus and a raw material recovery method, the apparatus comprising: a crucible for accommodating a crystal growth raw material; at least part of the seed crystal support can be immersed in a melt formed by the crystal growth raw materials in the crucible; the seed crystal support comprises a seed crystal bonding surface; the first supporting structure is connected with one side, opposite to the seed crystal bonding surface, of the seed crystal holder, and the first supporting structure is configured to drive the seed crystal holder to rotate. The first supporting structure is arranged to drive the seed crystal holder in the crucible to rotate, so that the mass transfer rate is increased, and the crystal growth speed is increased; meanwhile, the rotation of the seed crystal support can also improve the radial solute distribution uniformity of the seed crystal bonding surface and improve the growth quality of the crystal.

This invention discloses a method for preparing 5-methoxy-1-[4-(trifluoromethyl)phenyl]-1-pentanone using a microchannel reactor, comprising: weighing 2-methyltetrahydrofuran according to a predetermined ratio in a pre-dried reaction vessel; adding magnesium (1.1 to 1.3 equivalents) and an initiator to the 2-methyltetrahydrofuran; adding 1-chloro-4-methoxybutane (1.0 equivalents) dropwise; maintaining the reaction temperature at 30-60°C; and keeping the temperature constant for two hours after the addition is complete to obtain a 4-methoxybutylmagnesium chloride solution, which is raw material A solution; and dissolving 4-trifluoromethylbenzonitrile (0.9-0.95 equivalents) in 2-methyltetrahydrofuran. This invention can improve reaction yield, reduce side reactions, enhance mass transfer efficiency, solve the production safety hazards caused by violent exothermic reactions, overcome the safety risks of traditional batch reactor technology, use microreactors for safe and efficient post-processing, and use continuous distillation to purify the product, finally obtaining 5-methoxy-1-[4-(trifluoromethyl)phenyl]-1-pentanone in a yield of over 92%.

The invention discloses an integrated micro-fluidic chip system for detection, photothermal decomposition and verification of perfluorinated and polyfluoroalkyl substances. The integrated micro-fluidic chip system comprises an upper ultraviolet light-emitting layer, a middle micro-fluidic main body layer and a lower constant-temperature heating layer, the middle microfluidic main body layer internally comprises an inlet channel, an optical detection module, a photothermal decomposition chamber, a circulating pump structure, a residue verification chamber and an outlet channel; the upper ultraviolet light-emitting layer and the lower constant-temperature heating layer are respectively arranged corresponding to the photothermal decomposition chamber so as to provide a light field and a thermal field which have a synergistic effect; the system further comprises an external control circuit for controlling the operation of the circulating pump structure, the upper ultraviolet light-emitting layer and the lower constant-temperature heating layer, and controlling the path selection of the fluid according to the output result of the residual verification chamber, so as to realize a closed-loop treatment flow. According to the three-layer micro-fluidic chip system provided by the invention, efficient and reliable treatment on perfluoro and polyfluoroalkyl substances is realized through photo-thermal synergistic degradation and closed-loop feedback control.

The invention discloses a honeycomb biological carrier and a manufacturing method thereof, and relates to the technical field of sewage treatment. Comprising a supporting frame, at least one layer of honeycomb structure, a spiral outer rib and a coating, wherein a treatment space is formed in the supporting frame in a surrounding manner; the honeycomb structure is connected with the supporting frame and is arranged in the treatment space; the spiral outer rib is arranged between the honeycomb structure and the supporting frame, and the surface of the supporting frame, the surface of the honeycomb structure and the surface of the spiral outer rib are coated with the coating; the spiral outer ribs are used for increasing spiral disturbance of water flow, by arranging the spiral outer ribs, original linear or disordered motion of the water flow can be forcibly converted into rotary motion guided by the outer contours of the spiral outer ribs, and a retained water film on the surface of a carrier can be effectively damaged; and the substance exchange between the sewage and the surface of the biological membrane is changed from diffusion to convection, so that sludge and impurities are prevented from being deposited in pore channels.

This application relates to the field of silica purification and discloses a method for extracting high-purity silica from granite waste. First, pulsed microwave irradiation is applied to the waste powder, inducing microcracks at the phase interface by utilizing the difference in thermal expansion between metal oxide impurities and the quartz matrix. The cracked powder is then placed in a microwave high-pressure reactor, where supercritical carbon dioxide is used to force a eutectic solvent into the microcracks. Continuous microwaves are input, causing dipole polarization of the eutectic solvent, resulting in in-situ polarization heating, reducing kinetic viscosity, and accelerating coordination chelation reactions to form metal complexes. Critical point phase oscillation is performed through alternating temperature and pressure, creating a hydrodynamic pumping effect within the microcracks. A pressure-reducing valve is controlled to release pressure, and a high-speed gas flow carrying impurities is used to discharge the solvent to the external surface. The product is then obtained through washing and separation. This invention effectively solves the problem of difficulty in exposing and eluting deep impurities, significantly improving product purity.

The invention provides a potato-tower-shaped nanofiber as well as a preparation method and application thereof, and belongs to the technical field of solid-phase microextraction. The preparation method of the potato-tower-shaped nanofiber comprises the following steps: mixing and dissolving a fiber-forming polymer, an amino precursor, a spinning aid and a solvent I to prepare an electrostatic spinning solution; preparing nanofibers by using an electrostatic spinning technology; the preparation method comprises the following steps: soaking nanofibers in water, and washing and drying after soaking; dissolving an aldehyde group precursor and a template agent into a solvent II to obtain a mixed solution, dipping the nanofiber into the mixed solution, adding a catalyst, and then performing solvothermal reaction to obtain the potato-tower-shaped nanofiber. A large number of uniformly-distributed and orderly-arranged sheet structures are inlaid on the surface of the nanofiber, and the whole fiber is in a potato tower shape; the potato-tower-shaped nanofiber has excellent extraction performance on a micro-plastic loaded plasticizer. The potato-tower-shaped nanofiber disclosed by the invention shows good application potential in the fields of sample pretreatment and solid-phase microextraction.

This application relates to the field of etching apparatus technology, and more particularly to a carrier plate etching method and apparatus. The technical solution includes a conveying device and a spray system mounted above it. The spray system comprises multiple sets of local spray modules arranged sequentially along the carrier plate's movement direction. Each module includes a mounting box, a sealing mechanism located on both sides of the mounting box and forming a seal on the carrier plate surface, multiple etching nozzles, a flow guiding nozzle, and a recovery mechanism. The sealing mechanism defines a sealed etching area between the mounting box and the carrier plate. The flow guiding nozzle blows airflow towards the other side of this area, causing the etching solution to flow in a directional direction. The recovery mechanism then recovers the etching solution flowing to that side. This apparatus decomposes large-area spraying into multiple independent and controllable local etching segments, preventing uneven etching caused by irregular lateral diffusion and concentration decay of the etching solution. It also improves the etching solution exchange rate and etching efficiency, and enables timely recovery of waste liquid, reducing pollution and consumption.

The invention belongs to the field of electrolyzed water, and particularly relates to a sandwich membrane electrode for realizing functional gradient regulation and control through carbon carrier morphology control and a preparation method of the sandwich membrane electrode. Functional gradient regulation and control are realized through carbon carrier morphology control; the sandwich membrane electrode comprises a proton exchange membrane and catalyst layers attached to the two sides of the proton exchange membrane; the functional gradient regulation and control sandwich membrane electrode is designed by adopting effective regulation and control of carbon carriers with different sizes, and an anode and a cathode respectively comprise at least two catalytic layers. Wherein the catalytic layer is subjected to optimization design in the aspects of noble metal loading capacity, resin content, catalyst particle size and dispersion process. The optimization ensures the uniformity of the catalyst slurry and a good spraying effect. Therefore, the mass transfer rate and gas transmission efficiency are improved, the precious metal utilization rate is increased, and the durability is enhanced.

The invention relates to a baffling type electrochemical reactor, which belongs to the technical field of electrochemical oxidation, and comprises a reaction cavity, the lower part of the reaction cavity is provided with a medium inlet, and the upper part of the reaction cavity is provided with a medium outlet; and the at least one electrode reaction unit is arranged in the reaction cavity. Wherein the electrode reaction unit comprises a plurality of anode plates and a plurality of cathode plates which are arranged in a staggered manner, spoilers are arranged at the edges of the two sides of each cathode plate, and the spoilers, the adjacent cathode plates and the blocking plates jointly form a closed baffling channel, so that when fluid flows along gaps between the anode plates and the cathode plates in the reaction cavity, the flow of the fluid is blocked; and the direction is repeatedly changed under the guidance of the spoilers, so that a Z-shaped baffling path is formed. The structure is simple, the contact area of the anode and the conductive part is large, the mass transfer rate of reactants on the surface of the electrode can be increased, the surface flow velocity of the electrode plate is improved, and the electrochemical reaction rate is increased.

This invention discloses a pressure-resistant, high-gravity reaction device and a method for preparing low-sodium boehmite. The device includes a packing layer, which is divided into an upper packing layer and a lower packing layer. The upper packing layer is equipped with an upper baffle and an upper packing annular column. The upper baffle is a disk with one or more concentric concave annular grooves, and the upper packing annular column is a multi-layered concentric annular column filled with packing. The lower packing layer is equipped with a lower baffle and a lower packing annular column. The lower packing annular column is a multi-layered concentric annular column filled with packing, and the lower baffle is a disk with at least one concentric concave annular groove, which is arranged radially from the outer edge to the inner edge. The special packing structure solves the sealing problem without adding new sealing devices, controls the fluid flow path, is suitable for pressurized conditions, and improves mass transfer efficiency. Using this device in processes such as carbon fractionation for preparing boehmite slurry, rapid slurry heating, and sodium-free aging not only prevents the generation of impurities but also effectively reduces the sodium content of the product.

The utility model discloses a kind of disturbance type sewage treatment equipment based on microbial inoculant processing, it is related to sewage treatment technical field, including processing box, the inoculant delivery assembly is arranged on the upper surface of processing box, the oxygen delivery assembly is arranged on the lower surface of processing box, the stirring assembly is arranged in the inside of processing box;The stirring assembly includes growth frame, the growth frame is arranged in the inside of processing box, a plurality of connecting rods are fixedly connected in the middle of growth frame, the utility model provides a large number of attachment growth surface area for microorganism by setting built-in growth frame's stirring assembly, effectively improve the biomass in reactor, enhance system processing capacity and stability;The design of unique hyperboloid vertical shaft stirring disc is matched with the same direction circular arc disturbance strip, can produce soft and multi-dimensional three-dimensional flow field under the driving of submersible motor.

The invention relates to the technical field of plant effective component extraction, and discloses a method for extracting artemisinin through enzymolysis pretreatment, which comprises the steps of raw material pretreatment, composite enzymolysis pretreatment, ultrasonic-assisted extraction, impurity removal and concentration, purification and crystallization, and recrystallization and refining. A compound enzyme system composed of cellulase, hemicellulase and pectinase is adopted to conduct enzymolysis on artemisia annua powder, cell wall structures are destroyed to promote artemisinin release, ultrasonic-assisted extraction is combined to strengthen the extraction effect, and the product purity is improved through chitosan impurity removal, silica gel chromatography and two times of crystallization. The method is simple in process, environmentally friendly and energy-saving, effectively solves the problems that a traditional extraction method is low in extraction rate, insufficient in purity and high in cost, is suitable for large-scale industrial production, and has high practical value and industrialization prospects.

This invention discloses a wet-process high-efficiency arsenic removal method and its application apparatus using phosphoric acid, comprising the following steps: 1) preparing an arsenic removal agent and water in a certain proportion to form a solution; 2) adding the arsenic removal agent solution prepared in step 1) from the bottom of the arsenic removal reaction tank through a slurry pump; 3) reacting the arsenic removal agent added in step 2) with phosphoric acid; 4) introducing the H2S gas generated by the reaction of the arsenic removal agent and phosphoric acid in step 3) through an induced draft fan from the bottom of a scrubbing tower; 5) absorbing the H2S gas in step 4) by countercurrent scrubbing to form a sulfide solution; 6) adding the sulfide solution in step 5) to the phosphoric acid feed pipe by a slurry pump in a multi-point feeding manner. This invention makes the reaction more complete; after the unreacted H2S is absorbed with an alkaline solution and added to the phosphoric acid feed pipe by a multi-point feeding manner, the contact time and contact area between the sulfide and phosphoric acid are significantly increased, making the arsenic removal reaction of phosphoric acid more thorough.

The application discloses a fluorescent composite material, a preparation method thereof and application thereof in detecting formaldehyde, and belongs to the technical field of formaldehyde detection. The fluorescent composite material is of a NaYF4@CDs@SiO2@MIP structure and is in a multilayer core-shell configuration, and its components are sequentially arranged from inside to outside as follows: an up-conversion energy core layer: NaYF4:Yb 3+ / Er 3+ nanoparticles; a fluorescent response intermediate layer: carbon quantum dots loaded on the surface of the core layer; a protection and function interval layer: a mesoporous SiO2 shell layer coated on the outer layer of the CDs; and a specific recognition outer layer: a formaldehyde molecular imprinting polymer shell layer with imprinting cavities complementary to the spatial structure and functional groups of formaldehyde molecules. The material can realize accurate quantitative detection of formaldehyde in the range of 0.003-12.1 mg / L, has a response time of less than 5 min under a 980 nm excitation light source, has excellent fluorescence stability and strong anti-interference capability, and can be directly applied to on-site detection of complex substrates.

This application relates to the field of phosphoric acid preparation technology, and more particularly to a method for preparing industrial-grade phosphoric acid based on hydrochloric acid decomposition of phosphate rock. The method includes: pulping phosphate rock to obtain a phosphate rock slurry; acidifying the phosphate rock slurry with hydrochloric acid to obtain an acid-hydrolyzed slurry; filtering the acid-hydrolyzed slurry to obtain an intermediate filter material; extracting the intermediate filter material using a composite extractant to obtain calcium chloride product and a supported organic phase; and reverse-extracting the supported organic phase with water to obtain dicalcium phosphate product and industrial-grade phosphoric acid. The extraction is performed in a rotary microchannel device. The composite extractant comprises a mixed organic phase of trioctylamine, tributyl phosphate, and triethylamine in decreasing mass concentrations. This method, through the synergistic effect of multi-stage gradient impurity removal throughout the entire process and deep purification by a core innovative unit, improves the purity and yield of phosphoric acid produced by wet acid hydrolysis from three dimensions: pre-removal of impurities at the source, selective separation of core soluble impurities, and precise interception of trace impurities at the terminal stage, while achieving full recovery of phosphate rock.

The invention discloses a method for testing the electrochemical behavior of antimony in a deep eutectic solvent and preparing an antimony coating, and particularly discloses a method for preparing a choline chloride-ethylene glycol deep eutectic solvent, a method for testing the electrochemical behavior of Sb < 3 + > / Sb and a method for preparing the antimony coating. According to the invention, the ratio of choline chloride to ethylene glycol is changed from 1: 2 to 1: 3, and the diffusion coefficient of Sb (III) in ChCl-3EG at 333 K is 5.33 * 10 <-7 > cm < 2 >. S <-1 >, which is greater than that of ChCl-2EG (3.06 * 10 <-9 > cm < 2 >. S <-1 >); the apparent activation energy is 32.76 kJ * mol <-1 >, and is less than that of ChCl-2EG (50.723 kJ * mol <-1 >). The mass transfer rate of Sb (III) can be increased by increasing the content of ethylene glycol, the activation energy of electrolytic antimony is reduced, antimony electrolysis is easier, and energy consumption is lower in industrial application. The nucleation mode of Sb (III) in ChCl-3EG under 333 K is three-dimensional continuous nucleation, the nucleation mode of Sb (III) in ChCl-2EG is three-dimensional instantaneous nucleation, and the nucleation of antimony in the ChCl-3EG system is continuously formed along with the growth of antimony. The antimony coating obtained through electro-deposition is granular, and in a ChCl-2EG system, an antimony film gradually changes from particles to short rods and then to a dendritic shape.

The present application relates to the technical field of black and odorous water treatment, and discloses a black and odorous water treatment and restoration device, which comprises a bearing frame, an electrochemical treatment module arranged below the bearing frame, and a general control module arranged above the bearing frame; the electrochemical treatment module comprises a horizontal frame body, flexible electrode sheets, inner support plates and an adjusting function module; the horizontal frame bodies are arranged in an array on one side of the bearing frame immersed in water; each horizontal frame body is provided with an inner support plate arranged in an array below; the flexible electrode sheets are sleeved outside the inner support plates in the same group and are electrically connected to the general control module through wires; the inner support plates are driven to swing by the adjusting function module, the flexible electrode sheets are pushed and jacked outward from the inside by the inner support plates, and the flexible electrode sheets are subjected to periodic bending deformation.

This invention discloses a method for preparing a carbon black-supported hierarchical porous non-precious metal fuel cell catalyst, comprising the following steps: adding a metal salt to a solvent to obtain solution A; adding 2-methylimidazolium and imidazolium derivatives to a solvent to obtain solution B; mixing solutions A and B and then centrifuging to obtain a MOF precursor; placing the MOF precursor in a tube furnace to obtain carbonized NC powder; adding conductive carbon black to a solvent and ultrasonically dispersing to obtain solution C; adding the NC powder to solution C, dispersing it evenly, adding an active metal solution to obtain an active metal-supported solution D, and drying to obtain a powder with active metal sites supported on carbon black; and programmatically heating the obtained powder to obtain an M-NC@carbon black catalyst. The catalyst prepared by this method, using carbon black-supported MOF material as a support, can improve conductivity and solve problems such as poor oxygen intermediate transport capacity and inaccessible active sites in catalytic materials.