79results about How to "Reduce spawn rate" patented technology

The invention provides a high-temperature-resistant desulfurization catalyst and a preparation method thereof, and relates to the technical field of catalysis, and the high-temperature-resistant desulfurization catalyst comprises the following components in percentage by weight: 30-35% of cobalt phthalocyanine, 10-15% of Fe-PBTCA-EDTMP, 10-15% of manganese sulfate monohydrate, 10-15% of 2, 3, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 10-15% of 2, 3, 4-trimethyl-1, 3 The cleaning agent is prepared from 5-10% of 1, 4-dinitrophenol, 15-20% of tannin extract, 8-10% of sodium metavanadate, 8-10% of ammonium phosphate and 4-8% of ammonia-ammonium chloride solution. The high-temperature-resistant desulfurization catalyst disclosed by the invention has the advantages of being small in dosage, small in waste liquid discharge, good in regeneration effect, low in corrosion rate, low in operation cost, not easy to block a tower, capable of overcoming hydrogen cyanide poisoning, high-temperature-resistant and not easy to inactivate. In a wet oxidation desulfurization system, the high-temperature-resistant desulfurization catalyst provided by the invention overcomes the defects that a PDS desulfurization catalyst, an MSQ desulfurization catalyst, a vanadium pentoxide + tannin extract catalyst and an ADA catalyst are easy to inactivate and secondary salts in a desulfurization solution are increased quickly when the desulfurization solution is at a high temperature of 70 DEG C. In addition, the high-temperature-resistant desulfurization catalyst overcomes the defects that a complex iron catalyst is high in corrosivity, large in usage amount, prone to tower blockage and the like.

The utility model provides a multi-row cylinder diesel engine exhaust stopping system based on hydraulic control pull rod stretching, and belongs to the technical field of diesel engine control. Specifically, a rocker arm shaft is rotationally sleeved with a three-jaw rocker arm, one jaw of the three-jaw rocker arm is connected with a speed regulator through a pull rod structure, a second jaw of the three-jaw rocker arm is hinged to one end of a hydraulic telescopic A-row pull rod, and the other end of the hydraulic telescopic A-row pull rod is connected with a plurality of A-row fuel injection pumps through an A-row elastic reset control rod mechanism; a third claw of the three-claw rocker arm is hinged to one end of a B-row pull rod, and the other end of the B-row pull rod is connected with a plurality of B-row fuel injection pumps through a B-row elastic reset control rod mechanism. Communicated oil holes are formed in the rocker arm shaft, the three-jaw rocker arm and the hydraulic telescopic A-row pull rod, and the electromagnetic valve is communicated with the oil holes through oil ways and is further communicated with lubricating oil with certain pressure in a lubricating oil system of the diesel engine through the oil ways. The utility model relates to a system for controlling switching between a non-pressure state and a pressurized state based on a fluid hydraulic piston rod, and single-row ignition starting of a diesel engine is realized.

The invention provides an SOFC (solid oxide fuel cell) stack and a method for converting methane into low-carbon hydrocarbon and generating electric energy, the SOFC stack comprises a plurality of stack basic units, each cell stack basic unit comprises an electrolyte, a cathode and an anode which are arranged on two sides of the electrolyte, a cathode current collecting layer and an anode current collecting layer which are respectively arranged on the cathode and the anode, and a current collecting connector for connecting the cathode and the anode of the adjacent cell stack basic unit; wherein the collector connector is made of martensitic stainless steel, and chemical modification layers are arranged on the cathode side and the anode side of the collector connector; and a methane oxidative coupling catalyst is loaded on the chemical modification layer on the anode side of the current collecting connector. According to the invention, the chemical modification layer is formed on the surface of the collector connector made of martensitic stainless steel, and the methane oxidative coupling catalyst is loaded on the chemical modification layer on the anode side of the collector connector, so that the formation of carbon deposition on the surface is effectively inhibited, and the yield of low-carbon hydrocarbon products generated by methane conversion is improved.

The invention provides application of pulegone in pest prevention and control, and relates to the technical field of pest prevention and control. The pulegone can effectively kill adults of the ampullarian snails under the condition of high concentration, can inhibit spawning of the ampullarian snails and reduce the hatching rate of eggs laid by the ampullarian snails under the condition of low concentration, and can effectively inhibit hatching of the eggs and reduce the hatching rate by spraying egg masses of the ampullarian snails under the condition of low concentration. The plant source component pulegone is adopted to kill the ampullaria gigas, reproduction and breeding of the ampullaria gigas can be effectively destroyed at the same time, prevention and control of the ampullaria gigas are further achieved, and on the basis, pulegone can kill harmful snails such as snails.

The invention discloses a composition for delaying oxidation of a phenolic hydroxyl compound, which comprises a protective agent, a stabilizer and a protective agent, and the mass ratio of the protective agent to the stabilizer to the protective agent is (0.01-0.3): (0.01-3): (0.005-5). According to the composition for delaying oxidation of the phenolic hydroxyl compound, hydroxyl in the phenolic hydroxyl compound is influenced by a benzene ring, so that the activity is enhanced, and the phenolic hydroxyl compound is easily oxidized into quinones with different colors. The composition comprises a protective agent, a stabilizer and a protective agent which can form a triple protective cover to delay the oxidation of the phenolic hydroxyl compound. Wherein the protective agent can be complexed with metal ions to reduce the catalytic action of trace iron or other heavy metals in the system on the oxidation reaction, so that the generation rate of free radicals is reduced; hydrogen bonds are formed between the stabilizer and the phenolic hydroxyl compound, so that the probability that the phenolic hydroxyl group is attacked by free radicals is reduced, and the oxidation reaction of the phenolic hydroxyl compound is delayed; the protective agent has a certain electron donor capability and is competitively combined with free radicals, so that the free radicals become relatively stable, attack of the free radicals on phenolic hydroxyl groups is interrupted, oxidation reaction is inhibited, the thermal stability of phenolic hydroxyl compounds is greatly improved, and discoloration reaction is delayed.

The invention relates to the field of biological medicine, and particularly provides a pharmaceutical preparation of an anti-IL-11 monoclonal antibody, the pharmaceutical preparation comprises the anti-IL-11 monoclonal antibody, a buffer salt, a protein protective agent and a surfactant, and the anti-IL-11 monoclonal antibody comprises three heavy chain complementary determining regions respectively represented by HCDR1, HCDR2 and HCDR3 and three light chain complementary determining regions respectively represented by LCDR1, LCDR2 and LCDR3. According to the present invention, the buffer salt, the protein protective agent and the surfactant are synergistically matched to provide the suitable storage condition for the high-concentration anti-IL-11 monoclonal antibody, such that the particle performance of the pharmaceutical preparation is significantly changed, and the aggregate generation rate of the anti-IL-11 monoclonal antibody during the production, transportation and use process is reduced; the stability of physicochemical properties of the anti-IL-11 monoclonal antibody is improved, the potential safety risk is reduced, and the stability of a medicinal preparation is ensured.

The invention discloses application of a natural inducer in fruit preservation, and particularly relates to the technical field of fruit preservation. According to the application of the natural inducer in fruit preservation, the natural inducer is used as an active ingredient to inhibit growth of botrytis cinerea on fruits and induce immune systems of the fruits to enhance active oxygen metabolism; the natural inducer is theanine; the fruits are kiwi fruits. When the natural inducer provided by the invention is applied to fruit preservation, a relatively good preservation effect can be exerted on kiwi fruits.

The invention discloses membrane separation and concentration equipment for cheese production by-product whey wastewater, and belongs to the technical field of whey processing. The device comprises a controller, a support and tank bodies, each tank body is internally provided with a clamping assembly used for clamping and fixing a filtering membrane, each clamping assembly comprises an annular groove formed in the side wall of the corresponding tank body, a moving ring is slidably connected in each annular groove in a sleeved mode, the upper side of each moving ring is rotationally connected with multiple sets of threaded rods, and multiple sets of rotating grooves are formed in the side wall of the corresponding tank body. When whey wastewater is concentrated, a filter membrane is mounted and fixed through structures such as a movable ring and a threaded rod, the operation is simple, the fixing effect is good, and when the filter membrane is used for filtering, a motor is started to drive a control rod and a control ring to rotate back and forth, so that a cleaning plate is driven to rotate back and forth; a simple cleaning effect on the surface of the filtering membrane is formed, and the normal filtering effect of the filtering membrane is prevented from being influenced by excessive deposits on the surface of the filtering membrane.

The utility model discloses a premixer of a combustor, which comprises a cylinder body with a mixing cavity inside, and an air inlet and a mixed gas outlet which are communicated with the mixing cavity are respectively arranged at two ends of the cylinder body, and is characterized in that a turbulent flow impeller is arranged at the mixed gas outlet, a gas outlet pipe is further arranged in the mixing cavity, and a gas outlet pipe is arranged in the mixing cavity. The gas outlet pipe and the mixing cavity are coaxially arranged, a gas cavity is formed in the gas outlet pipe, the front end of the gas outlet pipe is arranged close to the turbulent flow impeller, and the rear end of the gas outlet pipe is communicated with a gas supply pipe; the outer diameter of the middle of the gas outlet pipe is larger than the outer diameters of the two ends of the gas outlet pipe, the outer edge of the middle of the gas outlet pipe is arranged close to the inner wall of the mixing cavity, a plurality of gas outlet holes are annularly and evenly distributed in the outer edge face of the middle of the gas outlet pipe, and the gas cavity is communicated with the mixing cavity through the gas outlet holes. The gas mixing uniformity is improved, the size is reduced, and the combustion efficiency is improved.

The invention discloses a slide clamping device for a pathological slice scanner, and relates to the field of slide clamping devices. The invention comprises a base, a clamping assembly, a cleaning assembly, a drying assembly, a height adjustment assembly, a transmission assembly, and; the clamping assembly is arranged on the top of the base, the cleaning assembly and the drying assembly are arranged on the base and the clamping assembly, the drying assembly is located beside the cleaning assembly, the height adjustment assembly is arranged below the base, the transmission assembly is connected with the height adjustment assembly and the clamping assembly, and moves to the center of the base through a moving plate, indirectly driving the slide to rise, when clamping slides of different sizes, when clamping a slide of a larger size, the rotating clamping block rotates with a smaller amplitude, the height of the slide rising is also smaller, the distance between the moving plate and the scanner will be smaller, a larger field of view will be scanned, the scanning efficiency will be improved, and the scanning effect will be improved.

The invention provides a self-adaptive message processing method and device, a medium and equipment. The method comprises the following steps: distributing a token bucket for a message queue; a genetic algorithm is adopted regularly to determine token bucket parameters according to the network performance change, wherein the token bucket parameters comprise the token generation rate and the token bucket capacity; generating tokens according to the token bucket generation rate, filling the token bucket with the token when each token is generated, and limiting the number of the tokens in the token bucket to be smaller than or equal to the token bucket capacity; before each message in the message queue is processed, one token is taken from the token bucket; and if the token is successfully taken out, processing the message. The invention provides a message processing scheme which can be adaptively adjusted and intelligently optimized.

The application discloses a method for normalizing mixed C4 olefins containing isobutene. The method comprises the following steps: 1) adding 1-20wt% of tert-butyl alcohol into mixed C4 hydrocarbon; 2) feeding the obtained mixed raw material into a normalizing unit to generate normal butene under the conditions of 280-400 DEG C and normal pressure. The normalizing catalyst comprises the following components: a) 10-20wt% of a binder; and b) 80-90wt% of ZSM-35 molecular sieve. In the method, the tert-butyl alcohol can be hydrolyzed into isobutene and water in the reaction process, the isobutene can be used as the C4 raw material, the water can react with the C4 olefins to generate the intermediate product C4 alcohol, the C4 alcohol can be dehydrated to generate normal butene, and in addition, the water can play a role in inhibiting the hydrogenation of the raw material or the intermediate in the reaction system, thereby reducing the generation probability of alkanes and improving the selectivity of normal butene. The method can efficiently and stably convert the C4 olefins in the raw material into normal butene-rich product, and provides an effective way for synthesizing normal butene.

The present invention relates to a sequential cycle engineering reverse osmosis desalination apparatus, and more particularly, to a sequential cycle engineering reverse osmosis desalination apparatus which substantially ensures high recovery by using a closed-loop reverse osmosis technique and which sequentially applies a reverse osmosis technique to reduce fouling, high-efficiency water treatment can be performed without a separate energy recovery device.

The invention discloses a preparation method of a simulation tree with an infrared stealth camouflage characteristic, and belongs to the technical field of infrared camouflage. The preparation method is used for solving the technical problems that in the prior art, a camouflage tree for military camouflage is poor in water resistance and acid-resistant color fastness, and the infrared stealth camouflage characteristic of a simulation tree needs to be further improved, and the preparation method of the simulation tree with the infrared stealth camouflage characteristic is provided. Comprising the following steps: heating and melting infrared simulation resin imitating the color of bark, and then coating the infrared simulation resin on the outer part of a simulation tree skeleton to form a simulation coating layer with the thickness of 20-30mm on the outer part of the simulation tree skeleton. By preparing the simulation tree skeleton coated with the glass fiber and coating the simulation tree skeleton with the infrared simulation resin, the highly similar simulation tree is prepared, the water-resistant and acid-resistant color fastness of the simulation tree is improved, the moisture absorption performance of the simulation tree is also improved, the transpiration of green vegetation leaves is simulated, and the simulation tree skeleton can be used as a simulation tree. The target is fused into the natural environment, and the infrared stealth effect is improved.

The invention belongs to the field of molecular genetics, and provides a rice SS3a allele and application thereof in increasing the content of resistant starch in rice and reducing the glucose generation rate. The gene is deleted at the 2387th basic group G of the third exon of the rice SS3a gene and contains a gene sequence as shown in SEQ ID No. 1. The allele can significantly increase the amylose content in rice and change the amylopectin structure, so that the resistant starch content of rice is significantly increased, and the glucose generation rate of rice is reduced. Meanwhile, the allele can also significantly improve the gelatinization characteristic and the viscosity characteristic of the rice, and has small influence on the grain weight of the rice. The invention further relates to application of the new SS3a allele in rice breeding, the allele can be introduced through a cross breeding method, or the original SS3a gene is subjected to site-directed mutagenesis to form the allele, and the allele is used for cultivating a new high-resistance starch rice strain.

The invention belongs to the technical field of polyamide 6 synthesis, and relates to a method for inhibiting generation of a polyamide 6 infusible cyclic dimer and application. According to the method, in the process of synthesizing polyamide 6 from caprolactam by adopting a hydrolysis method, amino acid is added in a ring opening stage and a polycondensation stage respectively, and the amino acid is amino acid except aminocaproic acid. According to the application, the polyamide 6 is synthesized by adopting the generation inhibition method for the infusible cyclic dimer of the polyamide 6. According to the invention, the proportion of the original non-fusible cyclic dimer during thermodynamic equilibrium is reduced by adding the amino acid at different stages, the melt quality is improved, the influence of the non-fusible cyclic dimer on melt spinning processing is avoided, and the processing requirement of direct high-speed spinning is met.

A low-NOx ammonia-coal stable combustion swirl burner relates to the field of clean combustion of coal with low carbon and low NOx. This invention addresses the problems of ammonia slip and high NOx emissions in existing ammonia-coal co-combustion technologies. In this invention, a primary air / pulverized coal duct is fitted onto a central NH3 duct, forming a primary air channel between them. An outer NH3 duct is fitted onto the primary air / pulverized coal duct, forming an NH3 channel between them. An inner secondary air duct is fitted onto the outer NH3 duct, forming an inner secondary air channel between them. An outer secondary air duct is fitted onto the inner secondary air duct, forming an outer secondary air channel between them. Tangential and axial blades are respectively installed in the inner and outer secondary air channels. This invention is used for pulverized coal swirl combustion.

This invention discloses an anti-condensation and diversion structure for cable branch boxes, belonging to the field of smart grid technology. It includes a cable branch outer box, within which a diversion hopper and a partitioned inner cavity are provided. The diversion hopper is located below the top of the partitioned inner cavity. This invention divides the upper part of the cable branch outer box into a double-layer structure through the partitioned inner cavity, effectively reducing the temperature difference between the inside and outside of the outer box and lowering the probability of condensation from the source. Combined with a heat-insulating and rainproof frame, it provides dual protection against rain and heat. When condensation occurs on the inner wall of the partitioned inner cavity, it is diverted by the diversion hopper and collected in a cleaning component, preventing condensation from dripping and corroding internal electrical components. Simultaneously, a dehumidification component filters and absorbs moisture from the outside air entering the cable branch outer box, effectively reducing moisture accumulation inside the outer box and comprehensively minimizing condensation, ensuring a dry and stable internal environment for outdoor power distribution equipment in the smart grid.

The present invention provides a method for preparing a multi-level porous iron-based catalyst, comprising the steps of: synthesizing iron hydroxide composite crystals, using soluble iron salt as raw material, synthesizing iron hydroxide composite crystals by template method and hydrothermal synthesis method; calcination treatment, first grinding the iron hydroxide composite crystals, and then high-temperature calcination treatment to obtain a multi-level porous iron-based catalyst. The present invention also provides a multi-level porous iron-based catalyst prepared by the above method. The present invention also provides an application of the above multi-level porous iron-based catalyst in the preparation of methane. The above multi-level porous iron-based catalyst is based on a traditional iron-based catalyst, and a template agent is introduced to form a multi-level pore structure to form a unique pore structure. The pore structure limits the generation of high-carbon molecules, thereby greatly improving the selectivity of methane.

The present invention belongs to the technical field of vitamin D3 synthesis, specifically, a photochemical reaction device and synthesis method for vitamin D3 synthesis, including a reactor, a jacket, a light cylinder and a spiral tube; the reactor is provided with a water inlet at the top and a drain at the bottom; the jacket is divided into an inner filter chamber and an outer filter chamber; the inner filter chamber and the outer filter chamber are connected with a liquid injection pipe at the top; a high-pressure mercury lamp is provided inside the light cylinder; the spiral tube is connected with a feed pipe at the top and a discharge pipe at the bottom. The spiral tube is used to transport the reaction raw materials, so that the raw materials can be exposed to light to the greatest extent and undergo a synthesis reaction, which not only realizes continuous and uninterrupted production, but also can take into account the output of vitamin D3 to the greatest extent, meet large-scale industrialization needs, and the spiral tube is completely immersed in cooling water, so that the cooling water directly exchanges heat with the high-temperature material through the spiral tube wall from all directions, thereby improving the cooling efficiency of the raw materials.

The invention relates to a purification and separation method, a purification and separation system and a preparation method of isocyanate. The purification and separation method of isocyanate comprises the following steps: conveying an isocyanate reaction solution to a light component removal tower, and carrying out primary rectification to obtain an isocyanate crude product solution; directly conveying the first crude product liquid to a finished product tower, heating the second crude product liquid for partial gasification, and then conveying the second crude product liquid to the finished product tower for secondary rectification together with the first crude product liquid to obtain heavy components, isocyanate and low-boiling-point substances; heating a part of low-boiling-point substances for partial gasification, and then refluxing the low-boiling-point substances to the light component removal tower; in the processes of the first rectification and the second rectification, the inert medium is used for cleaning the trays in the light component removal tower and the finished product tower. The purification and separation method is simple to operate, the polymer generation rate is low, the yield of isocyanate is increased, meanwhile, solid waste is reduced, online self-cleaning is achieved, blockage of all equipment in the rectification process can be effectively avoided, the operation stability of the whole purification and separation system is guaranteed, and the operation cycle of the purification and separation system is greatly prolonged.

The present invention provides a nozzle for a gas-particle two-phase suspension metallurgical process, wherein the concentrate is first mixed with swirl wind to produce a premixing effect, and the concentrate particles are dispersed more evenly under the action of the swirl wind. The dispersion of the premixed concentrate and swirl wind is further enhanced by the flow-guiding effect of the guide cone surface. The distributed wind coming out of the dispersed flow channel outlet of the dispersed surface further disperses the concentrate moving there, and the degree of mixing with the peripheral process wind is more sufficient and uniform, thereby improving the concentrate combustion effect, strengthening the mass transfer and heat transfer rates in the reaction tower, helping to improve the equipment capacity, and effectively reducing the smoke dust occurrence rate and the SO3 generation rate in the flue gas.

This utility model relates to the field of printed circuit board technology and discloses an inner layer edge structure of a circuit board, including: a first edge plate body disposed around the substrate body; a plurality of first flow-blocking beads equidistantly arranged on one or both sides of the edge plate body; and a plurality of second flow-blocking beads equidistantly arranged on one or both sides of the first flow-blocking beads, wherein the protruding area of ​​the second flow-blocking beads is larger than that of the first flow-blocking beads, and a first adhesive flow groove is formed between the first flow-blocking beads and the second flow-blocking beads to accommodate the flow of adhesive. This design can not only significantly reduce the flow velocity of the fluid and effectively prevent it from flowing outside the circuit board, thereby avoiding the problem of insufficient adhesive filling of the board pattern, but also the first adhesive flow grooves of different widths formed between the first and second flow-blocking beads of different sizes are interleaved, which can timely and evenly spread the adhesive of the insulating layer along the first adhesive flow groove, thereby ensuring uniform adhesive filling and reducing the probability of defective products.

This application relates to a spraying process for a highly corrosion- and wear-resistant yttrium oxide composite coating, aiming to solve the problems of high porosity, poor high-temperature stability, and insufficient wear resistance of existing yttrium oxide coatings. The process includes degreasing and cleaning, pure water immersion, sandblasting roughening, steam and water rinsing, ultrasonic cleaning, pre-drying, plasma spraying, orthogonal experimental parameter optimization, deep ultrasonic cleaning, and final drying and curing. A yttrium oxide and zirconium oxide composite powder is used to form a dense coating under optimized plasma spraying parameters, and high cleanliness is ensured through multi-stage cleaning and clean environment control. Through the above technical solution, this application significantly improves the coating's density, chemical stability, wear resistance, and thermal shock resistance, effectively blocks the penetration of corrosive media, reduces particulate contamination, and meets the stringent requirements of semiconductor etching equipment for long-lasting protective coatings.

The present invention provides an application of pulegone in pest control, and relates to the technical field of pest control. The pulegone can effectively kill adult golden apple snails at a high concentration, and can inhibit the laying of eggs of golden apple snails and reduce the hatching rate of eggs laid by golden apple snails at a low concentration. At the same time, spraying golden apple snail egg masses at a low concentration can effectively inhibit the hatching of eggs and reduce the hatching rate. That is, the use of pulegone, a plant-derived component, can kill golden apple snails, and can also effectively destroy the reproductive reproduction of golden apple snails, further realizing the prevention and control of golden apple snails, and on this basis, pulegone can also kill harmful snails such as striped snails.

This application relates to the field of security testing technology, specifically to a method and apparatus for generating fuzzy test data for vehicle-to-everything (V2X) security. The method includes: acquiring CAN bus data; calculating a parameter activity coefficient based on CAN bus frame data with the same ID in the real vehicle data, used to measure the activity and boundary conditions of various control commands in the real vehicle data; then combining the correlation between different IDs to perform temporal correlation feature measurement, and further calculating a random weight coefficient to measure the intensity of random transformation of each CAN bus frame data in the real vehicle data; and correcting the standard deviation of Gaussian noise based on the activity of different types of data and the dependencies between data, thereby generating test data for V2X security fuzzy testing. This application aims to generate test data that conforms to the statistical laws of vehicle communication, thereby improving the data pass rate in the underlying protocol stack and thus more effectively testing the upper-layer business logic.

The present application relates to the field of biological medicine, and specifically provides an anti-LILRB4 monoclonal antibody injection preparation, which comprises an anti-LILRB4 monoclonal antibody, a buffer salt, a protein protective agent, and a surfactant, wherein the pH of the injection preparation is 5.5-6.5. The injection preparation provided by the present application provides a good storage environment for the anti-LILRB4 monoclonal antibody through the synergistic interaction of different contents of the buffer salt, the protein protective agent, and the surfactant, and guarantees the biological activity of the anti-LILRB4 monoclonal antibody. The anti-LILRB4 monoclonal antibody can effectively inhibit the combination of the LILRB4 antigen and its ligand complex, thereby blocking the interaction with the ligand ApoE complex, preventing the activation of the downstream NF-kappa B signal pathway and the release of ARG1, preventing the inhibition of T cell proliferation and the promotion of tissue infiltration, and can be used for treating cancer.

The utility model relates to the technical field of emulsion synthesis, in particular to emulsion synthesis waste gas purification treatment equipment which comprises a mounting box, a blending structure; the blending speed in the emulsion synthesis process is changed through the blending structure; the condensation structure is used for carrying out condensation treatment on waste gas generated in the emulsion synthesis process; according to the device, emulsion synthesis is carried out through the mounting box, the internal space of the mounting box is separated through the first separation plate and the two second separation plates, so that various materials for emulsion synthesis are respectively placed, the various synthetic materials can be in contact with one another through the plurality of circulation holes, the emulsion is more fully synthesized, and the generation rate of waste gas is reduced; the two condensation boxes are used for containing condensing agents, after waste gas is generated, the waste gas makes contact with the low-temperature condensation box, the waste gas is condensed, liquefied and returned to the installation box again to be synthesized, the waste gas is exhausted out of the installation box through the multiple exhaust pipes, meanwhile, the two condensation boxes are shielded through the two heat insulation plates, and waste of the condensing agents is reduced.

This invention proposes a gasoline antiknock agent, its preparation method, and its application, belonging to the field of antiknock agent technology. Palm oil is subjected to molecular distillation, and the secondary distillation product and undistilled substances are collected. The undistilled substances react with ethanol to obtain palm oil fatty acid ethyl esters. The secondary distillation product undergoes a saponification reaction with an alkali to obtain a saponified product, which is then added to water with a hydrophilic emulsifier to obtain an aqueous phase. A lipophilic emulsifier, methyl malonate, and palm oil fatty acid ethyl esters are added to the residual oil to obtain an oil phase. The aqueous phase is then added dropwise to the oil phase, emulsified, and filtered to obtain the gasoline antiknock agent. This gasoline antiknock agent achieves antiknock through the rapid vaporization of nano-water droplets. While providing antiknock protection, it also reduces cylinder temperature and exhaust emissions. Furthermore, its components are safe and environmentally friendly, non-polluting, non-toxic, easily degradable, and low-cost. It maintains good antiknock performance even at relatively low temperatures, indicating broad application prospects.

The invention discloses a molecular sieve catalyst for benzene alkylation, a preparation method and an application thereof. In the catalyst, the molecular sieve crystal contains three kinds of nearly spherical cavities with size distribution, and the diameter distribution range of the circles corresponding to the vertical projections of the three cavities from top to bottom is respectively within 10-30nm, 40-50nm and 60-90nm, and the proportion of the number of the three cavities is 20%-40%, 50%-75% and 5%-10%, respectively. The present invention prepares a molecular sieve catalyst containing cavities of suitable size and proportion inside the molecular sieve crystal in a more economical method, and the prepared catalyst is particularly suitable for the benzene alkylation process, and has high activity, selectivity and stability.