63results about How to "Increase hole size" patented technology

The invention provides a coordination polymer material with a multistage pore passage structure and a preparation method thereof. The coordination polymer material with a multistage pore passage structure is internally provided with the multistage pore passage structure, the multistage pore passage structure is a microporous and / or mesoporous and / or macroporous multistage pore passage structure which is formed by the self assembly between the metal ion and the organic ligand, the apertures of the micropores are less than or equal to 2nm, the apertures of the mesopores are from 2nm to 50nm, and the apertures of the macropores are more than 50nm. The coordination polymer material with a multistage pore passage structure is large in specific surface, the large-size organic ligand does not need to be synthesized, and the coordination polymer material with larger porous sizes can be obtained without the template agent and the pore assisting agent, so that the invention is simple in preparation method, and low in cost.

Methods are provided for production of pre-collapsed capacitive micro-machined ultrasonic transducers (cMUTs). Methods disclosed generally include the steps of obtaining a nearly completed traditional cMUT structure prior to etching and sealing the membrane, defining holes through the membrane of the cMUT structure for each electrode ring fixed relative to the top face of the membrane, applying a bias voltage across the membrane and substrate of the cMUT structure so as to collapse the areas of the membrane proximate to the holes to or toward the substrate, fixing and sealing the collapsed areas of the membrane to the substrate by applying an encasing layer, and discontinuing or reducing the bias voltage. CMUT assemblies are provided, including packaged assemblies, integrated assemblies with an integrated circuit / chip (e.g., a beam-steering chip) and a cMUT / lens assembly. Advantageous cMUT-based applications utilizing the disclosed pre-collapsed cMUTs are also provided, e.g., ultrasound transducer-based applications, catheter-based applications, needle-based applications and flowmeter applications.

The invention relates to an SCM-5 molecular sieve and a preparation method thereof, for mainly solving the problems of porous materials of novel structures which are not related to in the prior art. By adopting the technical scheme that the SCM-5 molecular sieve is prepared from the following chemical components in a mole ratio: xO2 and nY2O3, wherein X is silicon or germanium, Y is at least one of the elements such as aluminum, boron, gallium and iron, n is greater than or equal to 0.0 and less than or equal to 0.40, the interplanar spacing of the SCM-5 molecular sieve has maximum values of X-ray diffraction peaks when d is equal to 11.20+ / -1.0., 7.35+ / -0.20., 5.50+ / -0.15., 3.60+ / -0.10. and 3.39+ / -0.04., the technical problem is relatively well solved, and the prepared SCM-5 molecular sieve has a relatively good application prospect in catalytic cracking of heavy oil and isomerization of organic molecules.

The invention discloses a composite fracturing and uniform permeability-improving method for tree-like boreholes in coal seams of an underground coal mine. The composite fracturing and uniform permeability-improving method is suitable for permeability improvement of soft low-permeability coal seams, and is characterized in that a gas exhausting and mining hole serve as a mother hole, uniformly distributed self-advancing boreholes serve as tree-like son boreholes, and a tree-like borehole net is subjected to hole-sealing fracturing. Compared with a conventional hydraulic fracturing method, the composite fracturing and uniform permeability-improving method can realize uniform fracturing of the low-permeability coal seams to enlarge the fracturing range of single crossing boreholes, so that uniform permeability improvement is achieved, and the shortcomings that the crossing boreholes subjected to conventional hydraulic fracturing are low in utilization ratio, and a single major fracture can damage top and bottom beds are overcome. The composite fracturing and uniform permeability-improving method is simple to operate, large in permeability improvement range and good in permeability improvement effect and provides a guarantee for safety production of the underground coal mine.

The invention relates to a coal mine downhole hydraulic jet tree-shaped drill hole way-type drilling unit. The drilling unit comprises drill rod, a guider, a drill bit, a high-pressure hose, a self-propelled drill bit and a dial. The drill rod is in threaded connection with the front end of the guider. The drill bit is in threaded connection with the tail end of the guider. The drill rod, the guider and the drill bit are used in cooperation, and the two steps of broaching and guider feeding-in can be finished at the same time. After broaching is finished, the high-pressure hose and the self-propelled drill bit are used for drilling tree-shaped drill holes in a coal seam. The distribution uniformity of the tree-shaped drill holes is controlled by the dial. The main effect of the drilling unit is to drill main holes of the tree-shaped drill holes of the coal seam and the tree-shaped drill holes, and uniform permeability increase of the coal seam is achieved. The drilling unit is simple in structure, convenient to operate and suitable for drilling the tree-shaped drill holes in the gas extraction process of the low-air-permeability coal seam.

The invention discloses a method for treating organic pollutants and photocatalytic sterilization by using a modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst, which comprises the following steps: the modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst and organic pollutant wastewater or bacteria solution are mixed for photocatalytic treatment to finish the treatment of the organic pollutant or bacteria, the modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst is prepared by taking hollow tubular carbon nitride as a carrier and the carrier is loaded with modified carbon quantum dots, wherein the hollow tubular carbon nitride is prepared from urea and melamine in a molar ratio of 1-5:1 and melamine through hydrothermal treatment and calcination. The method has the advantages of simple process, convenient operation, simple equipment, low cost, high treatment efficiency / photocatalysis efficiency, good removal effect / sterilization effect, cleanness, no pollution and the like, and has high application value and commercial value.

The invention discloses composite fracturing and uniform permeability increasing equipment for treelike drilling in a coal seam of an underground coal mine. The whole equipment can be divided into a hole forming system and a fracturing system. The hole forming system comprises a drilling machine, a drill stem, a drill bit, a support, a water tank, a high-pressure pump, a winch, a propelling mechanism, a chuck, a high-pressure hose, a self-propelled drill bit and the like. The fracturing system comprises the water tank, the high-pressure pump, a pressure meter, a high-pressure rubber pipe, a hole sealing device and the like. The composite fracturing and uniform permeability increasing equipment is suitable for carrying out volume fracturing on the coal seam of the underground coal mine, can reach the effects of carrying out uniform permeability increasing on the coal seam and increasing the gas extraction rate, and is easy to operate and good in economic performance.

An apparatus is used in cementing and perforating casing in a borehole. A cement head disposed on the casing has first and second containers. A first plug positioned in the first container deploys from the cement head in the casing in advance of cement slurry. An assembly positioned in the second container deploys from the cement head in the casing after the cement slurry. The first plug lands on a float collar on the casing, and a breachable passage in the first plug opens and allows the cement slurry to pass into the borehole annulus. The assembly has a wiper and has one or more charges. The wiper wipes the casing as the assembly is displaced down the casing with displacing fluid. Eventually, the assembly lands at the first plug, and hydraulic pressure applied in the casing activates the one or more charges to perforate the casing.

The invention relates to an SCM-3 molecular sieve and a preparation method thereof, which mainly solve the technical problems of the molecular sieve SCM-3 having a new structure not involved in the prior art. The invention provides a technical scheme of a new SCM-3 molecular sieve which comprises the following chemical compositions in mole ratio: XO2:nY2O3, wherein X is silicon or germanium; Y is at least one of elements such as aluminum, boron, gallium, iron and the like; 0.002<=n<=0.25; and the maximum value of an X-ray diffraction peak exists when the interplanar distance of the SCM-3 molecular sieve d=16.70+ / -1.7A, d=8.24+ / -0.23A, d=7.24+ / -0.15A, d=6.22+ / -0.12A, d=3.59+ / -0.06A, d=3.48+ / -0.06A and d=3.38+ / -0.06A. Thus, the technical scheme well solves the technical problems. The synthesized SCM-3 molecular sieve has favorable application prospects in the aspects of catalytic cracking of heavy oil and isomerization reaction of organic molecules.

The invention discloses a modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst and a preparation method thereof. The photocatalyst takes hollow tubular carbon nitride as a carrier and is loaded with modified carbon quantum dots; urea and melamine with a mole ratio of 1-5:1 are used to prepare the hollow tubular carbon nitride through hydrothermal and calcination. The preparation method comprises the following steps of: mixing hollow tubular carbon nitride, water and modified carbon quantum dot solution, and drying to obtain the photocatalyst. The photocatalyst has the advantages of large specific surface area, large number of pores, multiple active sites, high speed of separation and migration of photo-generated carriers, strong light absorption capacity, high photocatalytic activity, high stability, high photocatalytic efficiency and the like; the preparation method of the photocatalyst has the advantages of convenience in synthesis, simplicity in operation,no secondary pollution to the environment and the like. The photocatalyst can be widely used for treating organic pollutants in the environment and killing harmful microorganisms in the environment,and has good application value and application prospect.

The invention discloses a combined optical system for a sun sensor, comprising photomask and microlens, where the photomask is equipped with pore, and the microlens is arranged in back of the photomask in the direction of incident light and opposite to the pore. And the invention discloses a method for implementing the combined optical system. And the invention can provide smaller diffraction facula by bigger pore and is beneficial to preventing the pore on the photomask from being stopped or polluted.

The invention discloses a method for hydrodeoxidation upon lignin by using a ruthenium-based catalyst under a deep eutectic solvent (DES) condition. The method comprises the following steps: putting hydrothermal residues and a DES into a conical bottle, performing a reaction for 3-4 hours at 100-120 DEG C, and performing vacuum suction filtration so as to obtain DES filtrate of dissolved lignin, wherein the ratio of the hydrothermal residues to the DES is 1:20g / g; and in a hydrogen atmosphere, putting the deep eutectic solvent of the dissolved lignin and 50-300mg of a catalyst into a high-pressure reactor, and performing a reaction for 2-15 hours at 120-280 DEG C, wherein the catalyst is Ru / Nb2O5, Ru / ZSM-5, Ru / HY, Ru / gamma-Al2O3 or Ru / C. At a lower pressure and pressure and under short reaction conditions, operation of depolymerizing lignin to prepare phenolic compounds is achieved.

A socket for electrical parts, which is mounted on a circuit board, comprises a socket body on which the electrical part is accommodated, and a plurality of contactors disposed on the socket body for establishing an electrical connection between the circuit board and the electrical part. The socket body comprises a contact unit in which the contactors are held and the contact unit is comprised of plates to be superimposed. Each plate has a plurality of through holes through each of which the contactor is inserted. A hole size of the through holes of one plate being different from that of another plate which is directly disposed on the one plate so as to form a stepped portion between the through holes of the one plate and another plate. The stepped portion is used for preventing the contactor from coming off from the contact unit.

The invention discloses a nano porous crystalline material {[Cu (HTCPZ) 0.5]} infinity and a preparation method thereof. The preparation method of the nano porous crystalline material is characterized in that: 3-(4-tetrazole-phenyl) amine and copper chloride are subjected to solvothermal synthesis according to a molar ratio of 1:(3-15) at a temperature of 80-180 DEG C; the molecular formula of the obtained Cu-based microporous crystalline material is {[Cu (HTCPZ) 0.5]} infinity, wherein HTCPZ is 3-(4-tetrazole-phenyl) amine which is a tridentate ligand having the following molecular structure shown in the accompany drawing; and the porous crystalline material is a hexagonal system crystalline material, the space group is P6122, the size range of a pore canal is 1-1.2nm, and the inner surface of the pore canal contains a coordinatively unsaturated surface of metal Cu. The preparation method provided by the invention has the advantages of simpleness, mild reaction conditions, high yield and high purity of products. The porous crystalline material prepared by the invention has the advantages of uniform pore canal, nanopore size, and metal center immobilizing.

The invention provides a monodisperse polymer porous microsphere and a preparation method thereof, the porous microsphere takes a thermoplastic polymer as a matrix, the interior and the surface of the porous microsphere have pore structures, and the preparation method comprises the following steps: (1) preparing a blend of particles of a polymer A and a polymer B, or a blend of particles of the polymer A, the polymer B and a functional filler, (2) foaming the obtained blend by adopting a pressure relief method or a temperature rise method, and (3) placing the obtained foamed material in an etching solvent, etching to remove the polymer B, and carrying out solid-liquid separation, washing and drying to obtain the monodisperse polymer porous microspheres. According to the method, low-cost preparation of the large-aperture monodisperse polymer porous microspheres can be realized, meanwhile, the problems that a template is difficult to completely remove and a pore channel collapses can be avoided, and independent regulation and control of the particle size and the aperture can be realized.

The invention relates to a catalyst for preparing low-carbon olefin through Fischer-Tropsch synthesis and a preparation method of the catalyst, and mainly aims to solve the problems of low CO conversion rate and low-carbon olefin selectivity in reaction for preparing the low-carbon olefin through Fischer-Tropsch synthesis in the prior art. The invention adopts the following technical schemes: a composite oxide consisting of titanium oxide and alpha-aluminum oxide is adopted as a carrier, and an active component is loaded on the composite oxide carrier and contains a composition with the following chemical formula in an atomic ratio: Fe100AaBbCcOx, wherein A is selected from a transition metal of Mn, B is selected from at least one of alkali metals of Mg and Ca, and C is selected from at least one of K and Cs; the dosage of the composite oxide carrier is 20-80% of the weight of the catalyst; alpha-aluminum oxide contained in the composite oxide carrier accounts for 50-99% of the weight of the composite oxide carrier by weight. The catalyst disclosed by the invention well solves the problems, and can be applied to industrial production of low-carbon olefin prepared through Fischer-Tropsch synthesis.

The invention discloses a ship truss web structure and a ship structure, belonging to the technical field of ships. The ship truss web structure comprises a web plate and a bone material, wherein oneside of the web plate is a belt plate and the other side is a truss panel; a through hole is arranged on the web plate; the bone material is perpendicular to the web plate and passes through the through hole; one end of the bone material is in contact with the belt plate; and one side of the bone material is in contact with the inner wall of the through hole. The ship truss web structure of the invention enables the lightening hole or the outfitting hole and the through hole to share the same through hole, and under the condition of not affecting the strength of the web and not increasing thestress concentration point, the total opening area is larger, the weight reduction effect of the web structure is more obvious, and the weight reduction effect of the web structure is beneficial to reducing the center of gravity of the empty ship. Available openings are larger in size, especially in height, and can be outfitted with more and larger pipes or cables, thus reducing the number of openings, reducing the stress concentration point, reducing the fatigue source, and improving the anti-fatigue capacity of the structure.

The invention provides a double-peak nano-porous amorphous alloy and a preparation method thereof. The amorphous material has a double-peak nano-porous structure. The elementary composition of the amorphous material is Y<alpha>Ti<beta>Co<gamma>Al<eta>, wherein the atomic percentages of the elements are as follows: alpha greater than or equal to 3.31% and less than or equal to 5.58%, beta greater than or equal to 50.35% and less than or equal to 52.67%, gamma greater than or equal to 19.79% and less than or equal to 20.46%, and eta greater than or equal to 23.56% and less than or equal to 24.28%; and alpha plus beta plus gamma plus eta is 100. According to the preparation method, a Y<28>Ti<28>Co<20>Al<24> two-phase amorphous alloy serves as a precursor; a porous amorphous alloy framework isobtained through the free dealloying method; and the double-peak nano-porous amorphous alloy with a multistage porous structure is prepared through secondary dealloying. The defects that the technology is complex, the overall technological cycle is long, equipment is complex, the manufacturing cost of the equipment is high, the yield is low, the porous structure of the product is single, the poresize is big, the porosity is low and the specific surface area is small in the current porous amorphous alloy preparation process are overcome.

The invention provides a cadmium selenide quantum dot and nanoporous carbon composite material and a preparation method therefor. The cadmium selenide quantum dot and nanoporous carbon composite material is formed by cadmium selenide quantum dots and nanoporous carbon in a compounding manner; the cadmium selenide quantum dots are grown on the surface of the nanoporous carbon in an in-situ manner; and the nanoporous carbon is obtained by calcining a zeolite imidazate type coordination polymer under protection of an inert gas. The nanoporous carbon disclosed by the invention has the advantages of large specific surface area, uniform pore channels, and large pore channel dimensions; and when the composite material is formed by the nanoporous carbon and the cadmium selenide quantum dots, the dispersity of the cadmium selenide quantum dots can be improved, the crystal particle dimensions of the cadmium selenide quantum dots can be controlled, and generation of small-dimensional cadmium selenide quantum dots can be reduced, so that the photocatalytic efficiency and the service life of the composite material are obviously improved and prolonged.

To provide a method for producing a ceramic porous material which has a high strength, though it has a high porosity, and which is excellent in permeability without dust generation. In a ceramic porous material having a three-dimensional mesh-like skeleton structure with a large number of substantially spherical adjacent cells communicating with each other via communication holes, the crystal particle size at the rim of each communication hole in the skeleton structure is provided substantially equal to the crystal particle size in the other parts.

The invention provides a preparation method of a porous ionic type electrically-driven polymer intelligent material. When an ionic polymer-metal compound intelligent material is prepared, a Nafion solution and high-boiling-point additives are mixed, the mixture is pre-frozen in liquid nitrogen after vacuum casting and is then subjected to freeze drying, and finally the ionic polymer-metal compound intelligent material is prepared. When an ionic polymer gel intelligent material is prepared, deionized water, gel monomers, a cross-linking agent and an initiator are evenly mixed to obtain a feed solution; the feed solution is subjected to freeze drying after being pre-frozen in liquid nitrogen, and then immersed in the deionized water to swell at indoor temperature, and then the porous ionic polymer gel intelligent material is prepared. Under the condition that no additive is added, the porous ionic polymer-metal compound intelligent material formed through the freeze-drying process has the advantages of being high in deformation performance, high in response speed, weak in relaxation phenomenon and the like.

The invention relates to a porous layered graphene frame material as well as a preparation method and application thereof. The method comprises the following steps of performing reaction on a grapheneoxide three-dimensional structure body and diamino polyether amine for a certain time at a certain temperature, removing unreacted polyether amine with filtering-washing, and performing drying to obtain the porous layered graphene frame material. Compared with prior art, the method is low in price of involved raw materials, moderate in reaction condition and simple in technology. The obtained porous layered graphene frame material has homogeneous and controllable microporous / mesoporous pore channels and can be used for multiple fields of biological detection, chemocatalysis, electrochemical energy storage, gas storage and gas separation, wastewater treatment, environment protection and the like.

The invention discloses a precipitation well construction device. The precipitation well construction device comprises an air compressor, a drilling rig, a driving-pressing device, a connecting rod, ahammerhead and a downcomer, the air compressor supplies energy to the drilling rig, the driving-pressing device is mounted on the drilling rig, the hammerhead is mounted at the bottom end of the connecting rod, the downcomer is provided with a material filtering hole along the line, a reinforcing ring is mounted at the bottom end of the downcomer, the outer diameter of the hammerhead is slightlyless than the inner diameter of the downcomer and slightly greater than the inner diameter of the reinforcing ring, the connecting rod and the hammerhead are inserted into the downcomer, and the top end of the connecting rod is mounted on the driving-pressing device. The precipitation well construction device is low in construction difficulty, the construction process is reduced, the constructionperiod and materials are saved, and hole collapse is avoided.

The invention relates to the field of catalysts and discloses a propane dehydrogenation catalyst and a preparation method thereof and a method for preparing propylene by propane dehydrogenation. The propane dehydrogenation catalyst comprises a supporter, a Pt component, a Sn component and a Na component, and the Pt component, a Sn component and a Na component are supported on the supporter. The supporter is made of a mesoporous carbon material is in a cube-core-structure cubic and hexagonal intergrowth pore passage structure. The mesoporous carbon material is characterized in that the specificsurface area is 300-450m<2> / g, the pore volume is 0.1-0.5mL / g, and most probable pore diameter is 2-5nm. The propane dehydrogenation catalyst applied to reaction of propane dehydrogenation for preparing propylene shows excellent catalytic performance, and high propane conversion rate, high propylene selectivity and high catalyst stability are realized.

The invention discloses a supercapacitor composite electrode material containing carbon micro-tubes and a preparation method thereof, which is characterized in that the supercapacitor composite electrode material is prepared from the following raw materials in parts by weight: 10 to 20 of poplar catkin, 5 to 10 of P123, 80 to 150 of hydrochloric acid, 20 to 30 of tetraethyl orthosilicate, 5 to 10 of sugar bran, 2 to 3 of sulfuric acid, an appropriate amount of HF, 10 to 15 of ZnCl2 solution, 20 to 40 of ethanol, 2 to 5 of silane coupling agent KH560, 3 to 8 of pyrrole, 15 to 20 of p-toluene sulfonic acid, 15 to 20 of ammonium persulfate solution and 80 to 300 of water; after the mesoporous carbon is activated with ZnCl2, the pore size of the mesoporous carbon increases, the number of mesopores increases, and with the function of the silane coupling agent, the adhesion of a conductive polymer on the mesoporous carbon is facilitated, so that the composite material shows better electrochemical performance; and the larger diameter of the carbon micro-tubes is suitable for ion transport and electrochemical energy storage is facilitated.

The invention relates to a porous graphene frame material and a preparation method thereof. The method comprises the following steps that a graphene oxide solution reacts with polyamino-polyether-amine at a certain temperature for a certain period of time, un-reacted polyether-amine is removed through filtering-washing, and after drying is carried out, the porous graphene frame material is obtained. Compared with the prior art, the porous graphene frame material and the preparation method thereof have the advantages that the raw materials are low in price, the reaction condition is mild, and the process is simple; the obtained porous graphene frame material has microporous / mesoporous pores with pore sizes capable of being adjusted in a large range, and can be applied to various fields suchas biological detection, chemical catalysis, electrochemical energy storage, gas storage, gas separation, wastewater treatment, environmental protection, nano reactors and the like.

The invention discloses a sewer pipeline dredging device for municipal engineering. The sewer pipeline dredging device comprises a supporting seat, six balance supporting legs are mounted on the sidewalls of the supporting seat, a rotating seat is mounted on the inner side of the top end of the supporting seat, a water tank is mounted at the top end, near the edge, of the supporting seat, a rotating arm is mounted at the top end of the rotating seat, flushing water guns are arranged on the two sides of the rotating arm, and a rotating joint is mounted at the top end of the rotating arm. According to the sewer pipeline dredging device, the two flushing water guns are arranged so that rapid cooling and flushing can be carried out on a crushing head after crushing of the crushing head is finished, and the crushing head is convenient to clean and cool; the six balance supporting legs are arranged, and a jacking air rod is used for jacking a clamping jaws so that the device can keep good stability during working, and collapse caused by excessive resilience of a dredging arm is not generated; and the crushing head is formed by a blade and a drill bit so that blockage objects can be crushed during dredging, the dredging efficiency is improved, and the dredging effect is better.

To provide a method for producing a ceramic porous material which has a high strength, though it has a high porosity, and which is excellent in permeability without dust generation. In a ceramic porous material having a three-dimensional mesh-like skeleton structure with a large number of substantially spherical adjacent cells communicating with each other via communication holes, the crystal particle size at the rim of each communication hole in the skeleton structure is provided substantially equal to the crystal particle size in the other parts.

Stirred acid resistant shallow cylindrical reactors are used to produce both nitric and sulfuric acid from a feed gas stream arranged to contain both sulfur dioxide and nitrogen oxides passed over or through the mixed acids. The homogeneous catalytic mixture of sulfuric and nitric acids uses the highly oxidizing nitrosyl ion to further oxidize the gaseous oxide stream to sulfuric and nitric acids. Oxygen or air then oxidizes the nitrosyl ion reduction products back to nitrosyl ion for further reaction. The acids are separated by distillation, and concentrated using heat from the burner and the reaction heat. The modified sulfur burner used operates at temperatures to oxidize some of the nitrogen in the air. The temperature required may be obtained by increasing the oxygen of the air by pure oxygen. More nitrogen oxides may be produced by a glow discharge into the burner air or burning of ammonia. Any heavy metals such as mercury will be first oxidized then precipitated as sulfates.