41results about How to "Adjustable distribution" patented technology

The invention provides a cobalt-based compounded catalyst and preparing method and application thereof, comprising a carrier component and a metal component; the carrier uses spherical powder Al2O3; the metal component comprises a first metal component Co; a second metal component is one of Ce, La and Zr; a third metal component is one of Pt, Ru, Rh and Re; the weight percentage of each metal component in the finished catalyst is as follows: the first metal component is 10-35%; the second metal component is 0.5-10%; the third metal component is 0.05-3%; and the rest is aluminum oxide carrier. The invention is cobalt-based compounded catalyst with the diesel oil and paraffin as the main products; and the catalyst is applied for slurry bubble column reactor or continuous-stirring reactor with simple preparing method, less selectivity in methane, high reacting activity and good selectivity in C5+.

The invention belongs to the field of micron-nanometer material preparation and application, more particular relates to a multi-cavity composite micron / nanometer capsule and a multi-cavity micron / nanometer ball as well as the preparation method and device thereof. The multi-cavity composite micron / nanometer capsule is of a ball structure with micron and nanometer size, a plurality of cavities are arranged inside the ball, and the number of the cavities can be controlled; the cavities are separated and mutually independent by inner walls made of shell material; the cavities can respectively load different nuclear materials or same nuclear material, and the variety, the number and the distribution in the ball can be accurately controlled; the nuclear materials are mutually independent, do not contact mutually and do not contact with the outside environment directly; the shell material which forms the multi-cavity composite micron / nanometer capsule is different from the nuclear material; and the nuclear materials are selectively removed to obtain the micron / nanometer structure with multiple cavities. The preparation method is a multiple-fluid composite electric injection method, and the device has the characteristic that a multiple-fluid composite spray head is adopted. The multi-cavity micron / nanometer capsule provided by the invention is applied to coatings for environment sensitive materials and reactive materials, and the like.

The invention discloses a hanging type tunnel disaster prevention, rescue and maintenance device which comprises a guide rail and a platform, wherein the guide rail is mounted at the top of a tunnel, and the platform is hung under a wheel and advances in the tunnel along with the wheel. The hanging type tunnel disaster prevention, rescue and maintenance device has the advantages that the guide rail is mounted at the top of the tunnel, the platform used for rescue advances along the guide rail in a hanging manner and is positioned in the air in the tunnel, and therefore the platform realizes barrier-free movement; under the situation that a fire occurs in the tunnel, even if the tunnel is blocked, the platform can also quickly reach a position waiting for rescue, personal injury and property damage are avoided, and meanwhile traffic non-blocking type daily maintenance in the tunnel can also be carried out. In addition, the invention designs an umbrella type combined nozzle which is composed of auxiliary nozzles and a main nozzle. The auxiliary nozzles spray water to isolate a fire site from the surroundings, the size of the distribution circle of the auxiliary nozzles can be adjusted, the main nozzle at the center can selectively spray gas, foam water and fire fighting water according to the fire characteristics, and therefore high-efficiency fire fighting can be realized.

The catalyst consists of carrier SiO2, alumina, diatomite, etc; and the carried active components Co, Ca, Fe, etc. which accounts for 10-50 wt% of the catalyst and has the atom ratio of Co, Ca and Fe equal to 1 to 0.05-0.8 to 0-0.1. The catalyst may be prepared through one of precipitation process, soaking process and soaking-precipitation process. The catalyst is suitable for various amination reactions, especially the preparation process of lower aliphatic amine. When the catalyst is used, amine may be prepared at relatively low pressure and temperature, and the ratio between primary amine, secondary and tertiary amine may be regulated in relatively wide range.

The invention relates to a road and railway dual purpose vehicle, which comprises a highway travel system, a railway travel system and a suspension system arranged on the highway travel system and railway travel system. The suspension system comprises a suspension device composed of an air spring and a height regulation mechanism, and the height of the air spring is regulated by regulating the air amount charged in the air spring. The combined vehicle has the advantages that the air suspension system is used to actively level the height of the left-right two sides of the vehicle body to guarantee the driving safety without roll-over, according to regulating the charging of the air amount in the air spring arranged on different wheel pairs, the distribution of the axle load of the lifting transport vehicle of the highway and railway under the conditions of highway or railway, no-load or heavy-load can be regulated.

The invention relates to a sheet billet continuous casting and rolling production line and a production process thereof, and belongs to the technical field of sheet billet continuous casting and rolling. According to the technical scheme, the sheet billet continuous casting and rolling production line comprises a continuous casting machine (1), a 1#pendulum shear (3-1), a 1#tunnel type heating furnace (9-1), a 1#descaler (7-1), a roughing mill group (10), a 2#pendulum shear (3-2), a billet picking device (4), a 2#tunnel type heating furnace (9-2), a 2#descaler (7-2), a finishing mill group (11), a laminar cooling (18), a flying shear (19) and a reeling-up machine set (20) which are arranged in sequence according to a rolling sequence. When the continuous casting speed of the continuous casting machine (1) is less than 5m / min, single block rolling or semi-endless rolling is adopted; and when the continuous casting speed of the continuous casting machine (1) is greater than or equal to 5m / min, endless rolling is adopted. The sheet billet continuous casting and rolling production line and the production process thereof have the beneficial effects that the temperature uniformity and the surface quality of a casting blank can be ensured, and different rolling modes can be adopted according to the continuous casting speed of the continuous casting machine.

The invention relates to a catalyst for synthesis of low carbon alcohol by hydrogenation of carbon dioxide as well as a preparation method and an application thereof, and more specifically relates to a ternary metal sulfide catalyst with a layered structure as well as a preparation method and an application thereof. The catalyst employs basic nickel carbonate which is prepared by coprecipitation of nickel salt and base as a template, an ion exchange method is used for introducing transition metal molybdenum, alkali metal potassium is dipped, and sulfuration is carried out in order to obtain the catalyst. Hydrogenation for carbon dioxide is carried out on the catalyst in order to directly obtain ethanol, propanol and other alcohol fuel with high added values, and proportioning of each metal in the catalyst can be changed in order to adjust distribution of alcohol products. In an optimum condition, the mol fraction of ethanol in total alcohol reaches 43% and far exceeds the mol fraction of ethanol in total alcohol which is synthesized on a rhodium-based catalyst. Compared with a traditional coprecipitation immersion method, raw material loss due to different pH conditions of nickel and molybdenum precipitation is avoided, and utilization rate of raw material is substantially improved.

The invention relates to a water-based protective coating capable of adhering to a high temperature billet and a preparation method thereof, and belongs to the field of metal high-temperature protection. The water-based protective coating comprises main powder, 0-3wt% of an inorganic binder and 3-5wt% of a self-made additive. The main powder is prepared from natural raw materials such as clay, magnesite, diatomite, magnetite and metallurgy tailings. The self-made additive is a sol system comprising a surfactant and a Zn-containing component. The powder is subjected to ball milling so that particle sizes are less than 300 meshes, density of the slurry is adjusted to 1.2-1.5g / cm<3> and density is decreased with spray-coating temperature increasing. The water-based protective coating is suitable for spray-coating a billet having a temperature less than 1200 DEG C and heated in a heating furnace for 1-10h. The preparation method can realize adjustment and control of billet trace element distribution, does not change billet surface physicochemical characteristics and reduces a burning loss by more than 60%. The preparation method has active promotion effects of saving energy and reducing consumption in the metallurgy industry, improving steel quality and improving core competitiveness of a steel enterprise.

The invention relates to a preparation method of cellulose acetate propionate microspheres by an ionic liquid as a solvent. The preparation method utilizes a homogeneous esterification method to realize cellulose acetate propionate synthesis and realizes cellulose acetate propionate regeneration thereby producing the cellulose acetate propionate microspheres. The preparation method comprises the following steps of dissolving cellulose in an ionic liquid to obtain a cellulose solution, carrying out a process of a reaction of a propionic anhydride-acetic anhydride mixed solution and the cellulose solution, dispersing the above mixed solution into an oil phase, coagulating the cellulose solution by reversed phase suspension and programmed freezing to obtain cellulose solution drops, adding a curing agent into the cellulose solution drops for curing the cellulose solution drops so that cellulose microspheres are formed, after the reaction, carrying out solid-liquid phase centrifugation to obtain the cellulose acetate propionate microspheres and recovering the ionic liquid. The cellulose acetate propionate microspheres have regular spherical shapes, an acetyl substitution degree of cellulose acetate propionate is in a range of 0.02-0.5 and a propionyl substitution degree is in a range of 0.03-0.4, good mechanical properties, good thermostability and acid and alkali resistance are obtained, and the cellulose acetate propionate microspheres can be used for separation purification of biomacromolecule proteins and can also be used as a carrier of an enzyme or other biomaterials.

The invention discloses a production method of non-sintered artificial pelelith, and aims to overcome the defects that natural pelelith is less in resource and non-uniform in distribution and the conventional artificial pelelith process needs sintering. The production method comprises the following steps; mixing a compound gel material, a reinforcing material, an exciting agent and process water in proportion, re-adding modified polyethoxylated silicone (MPS) as a foam stabilizer, stirring for 1 min, finally, adding a gas former, then stirring for 1-3 min, and casting, foaming, curing and cutting to produce the artificial pelelith. Compared with the prior art, the production method provided by the invention does not need high-temperature sintering and is low in cost and easy for industrial production, and the obtained product is stable in performance and adjustable in both color and gas pore size, and is a favorable substitute of natural pelelith.

The invention discloses a device for manufacturing a lithium ion battery pole piece. The device comprises a pole piece transmitting device and a drying oven surrounding the pole piece transmitting device, wherein the drying oven is internally provided with a magnet device which can be used for generating a non-uniform strong magnetic field. In the device for manufacturing the lithium ion battery pole piece in the invention, the non-uniform strong magnetic field generated by the magnet device can be used for regulating the distribution of an electroconductive agent in the lithium ion battery pole piece, so that the impedance of the lithium ion battery pole piece is effectively reduced. In addition, the invention further discloses a method for manufacturing the lithium ion battery pole piece.

The invention relates to a lattice-type three-dimensional cell culture support and its manufacturing method and use method. The lattice-type three-dimensional cell culture support comprises a quartz optical template with micropores. The quartz optical template with the micropores is made of a quartz optical template with films. The micropores form an inclined column-type micropore array. The manufacturing method comprises the following steps of preparing the quartz optical template with the films, then preparing the inclined column-type micropore array, and removing the film of a polymer material. The use method of the lattice-type three-dimensional cell culture support comprises high temperature disinfection of the lattice-type three-dimensional cell culture support, surface modification, cell implantation and culture, cell fixation, cell permeabilization and enclosing, cell incubation and cell cleaning. The manufacturing method provided by the invention can adjust aperture sizes, distribution and crystal lattice layer number of the lattice-type three-dimensional cell culture support, can effectively improve scientific and complete experimental data for the tissue engineering research, can improve cell culture efficiency and can reduce the frequency of animal experiments. The lattice-type three-dimensional cell culture support is suitable for large-scale production, has a low cost and can satisfy wide requirements of regenerative medicine.

The invention provides a photographing optical lens assembly, an imaging apparatus and an electronic device. The photographing optical lens assembly includes eight lens elements, which are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element. Each of the eight lens elements has an object-side surface towards the object side and an image-side surface towards the image side. The first lens element has positive refractive power. The object-side surface of the fifth lens element is concave in a paraxial region thereof. The image-side surface of the sixth lens element is concave in a paraxial region thereof. The object-side surface of the seventh lens element is convex in a paraxial region thereof. The image-side surface of the eighth lens element is concave in a paraxial region thereof. When a specific condition is satisfied, the total length of the optical lens group for photographing can be shortened and a configuration of a large imaging surface can be provided.

The invention discloses a refrigerator refrigeration system. A varying temperature room I and a varying temperature room II are arranged in a refrigerator, an outlet of a compressor is connected withan inlet of a condenser, an outlet of the compressor is connected with an inlet of a dry filter, and an inlet of a changeover valve is connected with an outlet of the dry filter; the two outlets are separately connected with inlets of a first thin glass tube and a second thin glass tube, an outlet of the first thin glass tube is connected with an inlet of an evaporator, and an outlet of the secondfirst thin glass tube are separately connected with inlets of a second stop valve and a second evaporator through a three-way pipe; and an inlet of a first stop valve are separately connected with outlets of the first evaporator and the second evaporator through a three-way pipe, an inlet of the compressor is separately connected with outlets of the first stop valve and the second stop valve through a three-way pipe, and a controller is used for controlling the opening and closing of the changeover valve, the first stop valve and the second stop valve. The refrigerator refrigeration system can solve the distribution problem of refrigerants during refrigeration in different rooms, so that each room of the refrigerator can realize mutual conversion of refrigerating and freezing functions.

The invention discloses an in-site remediation method for permanently removing heavy metal in farmland soil. The method comprises the following steps: (1) preparing a porous support material; (2) preparing a modified compound material, namely, (a) weighting the porous support material prepared in step (1) and then adding to a toluene solvent to prepare a porous support material toluene solution; (b) dropwise adding TPDA to the prepared porous support material toluene solution, and then reacting under the temperature of 80 to 120 DEG C so as to obtain an amino modified porous support material; (c) centrifugally separating the prepared amino modified porous support material to obtain a solid, and washing the solid; (d) drying the washed solid in a vacuum drying box which is at the temperature of 60 to 80 DEG C, so as to obtain the modified compound material. The modified compound material is high in absorbing capacity for various kinds of heavy metal and cannot damage the soil; in addition, the physical properties of the soil can be effectively improved, and particularly the water-retaining performance and air breathability of the soil can be improved.

The application discloses an epitaxial wafer of an LED (Light Emitting Diode) and a manufacturing method thereof. The epitaxial wafer of the LED comprises an Si-doped GaN layer, a component constant luminous layer positioned above the Si-doped GaN layer, a component gradually-changed luminous layer positioned above the component constant luminous layer, and a P-type AlGaN layer positioned above the component gradually-changed luminous layer, wherein the component gradually-changed luminous layer comprises a GaN layer and an In-doped InGaN layer; the doped In concentrations of InGaN layers in all the cycles are different. Compared with the prior art, the epitaxial wafer disclosed by the application can adjust the distribution of the luminous layer in the electron filling state, and the energy band of the luminous layer is adjusted, so that the hole and electron compositing efficiency is improved.

The invention relates to magnetic polyurethane elastomer composites, in particular to a preparation method of high-performance magnetic polyurethane elastomer composites, and aims to solve the problem that the mechanical and magnetic properties of magnetic elastomer composites are difficult to be optimized simultaneously, wherein the solution is that the preparation method comprises the following steps: preparing Fe3O4 water-based magnetic fluid by a chemical coprecipitation method, and preparing graphene @ Fe3O4 composite magnetic particles by adsorption; purifying and dispersing the graphene @ Fe3O4 composite magnetic particles in an organic solvent to obtain graphene @ Fe3O4 composite organic magnetic fluid; taking graphene @ Fe3O4 composite organic magnetic fluid as one of the main raw materials to prepare graphene @ Fe3O4 polyurethane elastomer composites by a magnetic controlled in-situ polymerization method. The preparation method of high-performance magnetic polyurethane elastomer composites has the advantages that the problem of easy aggregation of functional fillers in the preparation and forming process of composites is solved, the dispersion and distribution of functional particles in polymer matrix are improved and controlled, graphene is introduced to improve the mechanical and magnetic properties of magnetic elastomer composites simultaneously, and the magnetic elastomer composites have excellent mechanical and magnetic properties.

The invention provides a preparation method of an ultrafine zirconia nanosphere. The method includes the steps of conducting melt spin quenching treatment on a cerium-aluminum-copper-zirconium alloy female ingot to prepare an amorphous thin strip; conducting dealloyed corrosion with nitric acid on the amorphous thin strip to obtain a dealloyed product; washing and drying the dealloyed product to obtain the ultrafine zirconia nanosphere. The cerium-aluminum-copper-zirconium alloy female ingot comprises, by atomic percentage, 40-65% of cerium, 5-10% of aluminum, 15-25% of copper and 5-35% of zirconium. According to the preparation method, the amorphous thin strip obtained by melt spin quenching is adopted as a precursor, so that the structural uniformity is ensured, and the product quality can be effectively improved. Cerium-aluminum-copper-zirconium amorphous alloy is selected as a precursor, other elements other than zirconium in the precursor can affect the precursor structure and correspondingly change the structure and shape of a synthesized material. The ultrafine zirconia nanosphere prepared by the method is in a regular spherical shape, regular in shape, good in crystallinity, uniform and controllable in size and has a high specific surface area.

The invention provides an electrochemical treatment method and device of carbon particles and mainly solves the technical problem that an existing acid oxidation process to treat carbon particles causes great corrosion on equipment and a grafting process fails to meet the environmental protection standard. A carbon particle suspension is placed between an anode and a cathode which are parallel andspaced; a constant voltage is applied between the cathode and the anode by an electrochemical method; by introducing current of constant strength or by means of cyclic voltammetry, the carbon particles are brought to contact with the surface of the anode, and oxygen-bearing nitrogen-bearing functional groups are generated by reacting. The method provided herein as a carbon particle surface treatment method, has the advantages that the raw material is easy to obtain, the cost is low, operation is simple, and large-scale preparation is available; the type, quantity and distribution of the functional groups are controllable.

An image capturing lens assembly, an imaging apparatus and an electronic device are provided. The image capturing lens assembly includes seven lens elements, which are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element, each of the seven lens elements has an object-side surface towards the object side and an image-side surface towards the image side. The first lens element has negative refractive power. The third lens element has positive refractive power. The seventh lens element has negative refractive power. When a specific condition is satisfied, a wide viewing angle configuration can be formed, the volume of the image capturing lens group can be compressed, and aberration can be reduced.

The invention discloses an image capturing optical system, an image capturing device and an electronic device. The image capturing optical system includes ten lenses. The ten lenses are sequentially a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens from the object side to the image side along an optical path. Each of the ten lenses has an object-side surface facing the object-side direction and an image-side surface facing the image-side direction. The first lens element has positive refractive power. The second lens element has an image-side surface being concave in a paraxial region thereof. The tenth lens element has negative refractive power. At least one of an object-side surface and an image-side surface of at least one lens in the image capturing optical system has at least one critical point at an off-axis position. When specific conditions are met, the image capturing optical system can meet the requirements of wide viewing angle, miniaturization and high imaging quality at the same time. The image capturing device is provided with the image capturing optical system, and the electronic device is provided with the image capturing device.

The invention discloses a mordenite molecular sieve as well as a preparation method and application thereof. The invention relates to a mordenite molecular sieve. The mordenite molecular sieve is selected from any one of the following anhydrous chemical formulas, r is a first template agent, and R is selected from any one of tetramethyl diamine compounds; q is a second template agent, and Q is selected from any one of cyclohexylamine compounds; m is an alkali metal ion; a represents the mole number of R corresponding to each mole of (SixAly) O2; b represents the mole number of Q corresponding to each mole of (SixAly) O2; c represents the mole number of M corresponding to each mole of (SixAly) O2; x and y respectively represent mole fractions of Si and Al. The mordenite molecular sieve is prepared from double template agents, on one hand, a high silica-alumina ratio can be obtained, and on the other hand, the proportion of an acid center of an 8-membered ring pore channel of the mordenite molecular sieve to a total B acid center can be flexibly adjusted within a certain range.

The invention relates to a preparation method of a composite carrier catalyst and low-carbon chain olefin. The preparation method of the composite carrier catalyst comprises the following steps of crystallizing an initial gel mixture, introducing the mixed gas of acetylene and hydrogen in the crystallizing process, repeatedly charging and discharging gas, and then punching, so as to obtain a composite carrier with an SAPO-34 molecular sieve carrier; loading active components onto the composite carrier, so as to obtain the composite carrier catalyst. The preparation method of the low-carbon chain olefin comprises the following steps of using hydrogen to reduce the catalyst, mixing the acetylene and the hydrogen, and reacting with the catalyst, so as to obtain the low-carbon chain olefin. The preparation method has the advantages that by adopting the special crystallizing method, the prepared composite carrier catalyst has double active centers, the hydrogenation reaction and polymerization reaction can be realized, and the one-step preparation effect of the low-carbon chain olefin can be realized; the preparation process is simple, the catalyzing efficiency is high, and the cost islow; by adjusting the proportional ratio of the hydrogen and the acetylene, the distribution of the low-carbon chain olefin product can be adjusted, and the selectivity is high in the preparation process of the low-carbon chain olefin.

The invention discloses a thermoplastic one-way belt production device and method. The thermoplastic one-way belt production device includes a yarn creel, a yarn spreading device, a powder spreading device, a heating device, a press-fit device, a cutting device, a winding part and a supporting roller way; the supporting roller way is arranged between the yarn spreading device and the winding part,and the two ends of reinforced continuous fiber are arranged on the yarn creel and the winding part respectively; in the direction from the yarn creel to the winding part, the powder spreading device, the heating device, the press-fit device and the cutting device are sequentially arranged on the supporting roller way; and the powder spreading device comprises a plurality of powder spreading machine heads, wherein the powder spreading machine heads are correspondingly arranged on the right side and / or the left side of the yarn spreading device. According to the thermoplastic one-way belt production device and method, the powder spreading device is arranged so that the fiber content in a thermoplastic one-way belt can be adjusted within a relatively large adjusting range, moreover, resin powder is uniformly dispersed, the powder distribution amount can be adjusted on the surface of the reinforced continuous fiber, so that the thermoplastic one-way belt is not prone to warp.

The invention discloses a butt welding material and welding method for TA1-Q235 composite boards. The material comprises a laser cladding layer and a welding material for a copper base layer for TIG welding; a raw material of the laser cladding layer is laser cladding powder, wherein the laser cladding powder is composed of the following components of 30%-40% of Cu powder, 20%-30% of V powder, 10%-20% of Ni powder, 10%-20% of Ag powder and 5%-10% of B powder; a raw material of the copper-based layer for TIG welding is a copper-based flux-cored wire for TIG welding, wherein powder is composed of the following components of 20%-30% of Ag powder, 15%-25% of V powder, 15%-25% of Nb powder, 10%-20% of Ni powder, 5%-10% of Al powder, 5%-10% of Co powder and 5%-10% of B powder; and welding skin is a copper belt. The welding material solves the problem that the TA1-Q235 layered composite boards cannot be directly welded and butted. The invention further discloses a welding method for TA1-Q235 composite boards.

The invention belongs to the scope of preparation of geopolymer foaming materials, and specifically discloses a preparation method of geopolymer open-cell foaming materials, which is characterized in that the geopolymer raw materials, alkali activators, hydrogen peroxide, twelve The raw material slurry of sodium alkylbenzene sulfonate is foamed to obtain the product; sodium dodecylbenzene sulfonate is 0.2-1% of the weight of the geopolymer; H2O2 is 0.01-5% of the weight of the geopolymer raw material. The present invention innovatively uses sodium dodecylbenzene sulfonate to control the pore structure, and further through the synergistic control of the dosage of sodium dodecylbenzenesulfonate, foaming agent and its dosage, etc., can unexpectedly prepare the A geopolymer open-cell foaming material with a large specific surface area, uniform distribution of pores, and a relatively large pore diameter of the interconnecting pores was developed.

The invention is a kind of smoke desulfurizing method using swing muzzle drying method, including the producing of desulfurizing agent, the desulfurizing reaction, the separation and recycling of outer desulfurizing particles. The invention uses swing muzzle which can adjust the position and direction of material feeding, it adjusts the position and direction through swing of nozzle. The swing type includes swing up and down, right and left. It can swing about í‚30íÒvertically and about í‚45íÒflatly, the range of sidelong swing is about í‚30íÒto í‚45íÒrelative to the centre.

The invention relates to a catalyst for synthesis of low carbon alcohol by hydrogenation of carbon dioxide as well as a preparation method and an application thereof, and more specifically relates to a ternary metal sulfide catalyst with a layered structure as well as a preparation method and an application thereof. The catalyst employs basic nickel carbonate which is prepared by coprecipitation of nickel salt and base as a template, an ion exchange method is used for introducing transition metal molybdenum, alkali metal potassium is dipped, and sulfuration is carried out in order to obtain the catalyst. Hydrogenation for carbon dioxide is carried out on the catalyst in order to directly obtain ethanol, propanol and other alcohol fuel with high added values, and proportioning of each metal in the catalyst can be changed in order to adjust distribution of alcohol products. In an optimum condition, the mol fraction of ethanol in total alcohol reaches 43% and far exceeds the mol fraction of ethanol in total alcohol which is synthesized on a rhodium-based catalyst. Compared with a traditional coprecipitation immersion method, raw material loss due to different pH conditions of nickel and molybdenum precipitation is avoided, and utilization rate of raw material is substantially improved.

The invention relates to a heat insulation material containing a gradient distribution anti-radiation agent and its preparation method and application, including: using a silicon-aluminum composite sol and a silane coupling agent to adjust the surface group reactivity and surface polarity of the fiber reinforcement respectively ; Preparation of dispersions containing silica sol precursors, surfactants, catalysts and different concentrations of anti-radiation agents; while adding dispersions with high concentrations of anti-radiation agents to dispersions with low concentrations to form mixed dispersions, perform glue injection , then gelled, aged, and dried. The invention also relates to the heat insulating material prepared by the method and its application. The heat insulation material has a structure of uniform and discrete distribution of anti-radiation particles in the plane and a discrete distribution of normal gradients, which maximizes the anti-radiation efficiency brought by the same mass anti-radiation agent while ensuring excellent integrity, eliminating The adsorption and filtration of anti-radiation agent particles by fibers realizes the arbitrary matching of reinforcement fibers and anti-radiation agents and solves the problem of agglomeration.