89results about How to "Strong industrial application value" patented technology

The invention discloses a catalytic system used for synthesizing cyclic carbonate ester. The catalytic system comprises a catalyst with structural unit shown in formula I and quaternary ammonium salt shown in a general structure of formula II, wherein n is equal to 1-4 in the general structure of formula II. The catalytic system is suitable for catalyzing the reaction system in which carbon dioxide reacts with epoxy compound to synthesize the cyclic carbonate ester, in the reaction system, all the various epoxy compounds are applicable to the method, such as propylene oxide, epoxy chloropropane, styrene oxide, 2,3-glycidyl phenyl ether or cyclohexene oxide; the reaction temperature is 30-80 DEG C; the pressure of carbon dioxide is 2-12 MPa; and reaction time is 1-24 h. Compared with the conventional method, the catalytic system has the advantages of mild reaction condition, high recovery rate and high selectivity, and reuse of the major catalyst metal-organic coordination polymer (MOF-5) by simple filtration. Therefore, the catalytic system has strong industrial application value.

The invention provides a preparation method of ultrahigh molecular weight polyethylene, comprising the step of adding an external electron donor in the presence of a catalyst and a cocatalyst for ethene and alpha alkene copolymerization to prepare ultrahigh molecular weight polyethylene. The catalyst contains a magnesium-and-titanium-containing solid loaded with at least one titanium compound and at least one electron donor. The magnesium-and-titanium-containing solid is obtained by steps of dissolving the magnesium compound in a solvent system to form a uniform solution, optionally adding an assistant precipitation agent in the presence of a titanium halide, and precipitating the magnesium-and-titanium-containing solid precipitate again. The method provided by the invention can be used to obviously raise the molecular weight of polyethylene and obtain ultrahigh molecular weight polyethylene. The method requires mild experimental conditions, is simple to operate, and has a strong industrial application value.

The invention relates to a layered catalyst for selectively oxidizing 4-methylguaiacol-to-vanillin, and a preparation method thereof, and belongs to the technical field of catalysts. A coactive site is added to change the electronic structure of a main catalytic active site Co; and anions with different selective dear anion effect by inserting different hydrophilic and hydrophobic properties are inserted into an interlayer in order to influence the selectivity on products. One or more of magnesium, zinc, copper, aluminum, iron, nickel, manganese, titanium, samarium, calcium, cerium and chromium, gallium, indium, tin and other elements is / are added as a coactive component. The preparation method comprises the following steps: preparing a solution by using nitrates or chlorides of active components and the coactive component(s), adding a precipitating agent, carrying out a heating reaction, washing a solid substance, and drying; adding the prepared layered hydrotalciteinto a solution containing anions to be exchanged, and carrying out an ion exchange process to obtain the intercalated hydrotalcite catalyst. The prepared catalyst can be applied to the oxidation reaction of 4-methylguaiacol. The catalyst has high activity and has high selectivity to vanillin.

The invention discloses a honeycomb type low-temperature flue gas denitrification catalystpowder and a preparing method thereof.The honeycomb type low-temperature flue gas denitrification catalyst powder is prepared from, by mass, 3.0-5.0 parts of vanadium oxide, 3.5-5.1 parts of molybdenum oxide, 0.1-1.0 part of tungsten oxide, 0.1-3.0 parts of manganese oxide, 0.01-0.1 part of phosphorus oxide, 0.01-0.05 part of boric oxide, 0.1-1.0 part of copper oxide and 84.75-92.68 parts of titanium dioxide.The preparing method comprises the steps that firstly, an active component solution is prepared; secondly, a catalyst is loaded with an impregnation method; thirdly, the consistent honeycomb type catalyst is prepared through extruding forming.According to the honeycomb type low-temperature flue gas denitrification catalyst powder and the preparing method thereof, the activity and catalytic capability of the low-temperature flue gas denitrification catalyst are effectively improved, the denitrification efficiency can reach 38% at 120 DEG C and reaches 95.1% at 210 DEG C, high industrial application value is achieved, and the honeycomb type low-temperature flue gas denitrification catalyst can be widely applied to NH3 selective catalytic reaction of nitric oxide in flue gas.

The invention relates to an axially through H-type finned tube and a heat exchange tube bundle thereof. The H-type finned tube comprises a base tube part, a fin part and a through part, wherein the base tube part comprises at least one base tube; the fin part comprises a plurality of parallel fin groups which are arranged in the axial direction of the base tube and connected with the outer wall of the base tube; each fin group comprises two fins which are symmetrically arranged on two sides of the base tube and regularly arranged according to a certain pitch; a groove matched with the outer wall of the base tube is formed in the inner side of each fin; the through part comprises through grooves that are processed in parts of the surfaces of the fines in a smoke flowing direction and arranged relative to the base tube; and flow deflectors passing through the corresponding through grooves are arranged on a smoke outlet side and connect the fin groups in series in the axial direction of the base tube to change the axial cross section of the H-type finned tube from a plane into a three-dimensional structure. According to the axially through H-type finned tube and the heat exchange tube bundle thereof, an initial region of ash deposition can be effectively eliminated, a flow stagnation region on the leeward side of the finned tube is obviously reduced, and ash deposited on the side surfaces of the fins and the base tube in the flow stagnation region is greatly reduced; meanwhile, the heat transfer effect of the H-type finned tube is effectively enhanced; and the through grooves can be formed by punching, so that automatic production can be realized easily.

The invention provides a preparation method for synthesizing 1-acetyl-7-cyanopyridine-5-(2-amino propyl) indoline which is a key intermediate of silodosin. The method comprises the following steps: 1-acetylindoline is adopted to serve as the material, and 1-acetyl-7-cyanopyridine-5-(2-amino propyl) indoline can be obtained through the such 7 steps as friedel-crafts acylation reaction, phthalimide amination, alkylsilane reduction, nitrification, reduction, heavy nitrogen cyaniding and deprotection. According to the method, the materials in the whole synthesizing line are cost-saving and easy to obtain, the operation is simple and the operation cost is low. Moreover, the yield rate of each step of reaction is higher than that in the prior art. Therefore, the method provided by the invention is very suitable for industrial production and has larger industrial application value.

The invention discloses a hot-melt pressure-sensitive adhesive for viscosity modification of SBS asphalt waterproof coiled materials. The hot-melt pressure-sensitive adhesive is prepared from the following components in parts by weight: 14 to 16 parts of SBS thermoplastic elastomer, 9 to 11 parts of SIS thermoplastic elastomer, 7 to 9 parts of polyolefin resin, 14 to 16 parts of petroleum resin, 9to 11 parts of a plasticizer, 1 to 2 parts of an antioxidant and 1 to 2 parts of an ultraviolet light absorber. Experimental test results show that the SBS asphalt waterproof coiled materials prepared from the hot-melt pressure-sensitive adhesive have good heat resistance, low-temperature flexibility and joint peeling strength which are far higher than performance indexes of grade II (-25 DEG C)in GB 18242-2008 <Styrene butadiene styrene(SBS) modified bituminous sheet materials>. In addition, the SBS asphalt waterproof coiled materials prepared from the hot-melt pressure-sensitive adhesive provided by the invention also have good water impermeability, aging resistance and persistent viscosity, and have very strong industrial application value and development prospect.

The invention discloses a method for extracting scandium from scandium enrichment. The method comprises the steps of: firstly, mixing over 90% of 100-mesh scandium enrichment with an alkali metal hydroxide by a weight ratio of 1:(0.6-1.8) to obtain a mixture; roasting the mixture at the temperature of 300-650 DEG C to obtain a roasted ore; washing the roasted ore to a pH value of 7-9 with water, wherein the water washing liquid is used for recovering hydroxides of silicon, aluminum and alkali metal; leaching out water washing residues by hydrochloric acid; and filtering to obtain leached residues used as raw materials for recovering the silicon, wherein a leachate is a scandium-containing coarse solution and used as a raw material for further extracting scandium. The method is simple and scientific in technology, capable of effectively leaching and extracting scandium from the scandium enrichment prepared by baiyuneboite or tailings of the baiyuneboite, and high in leaching rate; in addition, other byproducts can be recovered in the technology; and the method can be used for comprehensively recovering the rare dispersive element scandium from the tailings of baiyuneboite.

The invention relates to a preparation method of pyridine-2-formaldehyde. The preparation method comprises the following two steps: preparing an acidity-regulator-containing supported catalyst with titanium dioxide used as a carrier, molybdenum bismuth oxide used as a main body and transition metal oxide used as an auxiliary, carrying out gas-phase oxidation reaction on 2-methyl pyridine, oxygen and water used as raw materials in a fixed bed catalytic reactor at 250-350 DEG C to obtain a crude pyridine-2-formaldehyde product, extracting the crude product with dichloromethane, carrying out pressure-reduced distillation on the extract to remove dichloromethane, and then rectifying to obtain a pure product with a pyridine-2-formaldehyde content more than 98%. The preparation method provided by the invention has the advantages of simple preparation process, high efficiency, low cost, high catalytic reaction activity and selectivity, easy separation of main products and by-products and high purity.

The invention provides a method for producing expanded graphite / metal oxide composite used in a super electrode capacitor. The raw materials including 5-99 percent of expanded graphite and 1-95 percent of transition metal oxide by weight percentage are prepared and then processed according to the following steps: (a) the transition metal oxide nanometer particles are uniformly dispersed into water solution through surface active agents to prepare the stable dispersion liquid of inorganic nanometer particles, and the weight ratio of the nanometer particles is 1-70 percent; and (b) the expanded graphite is immersed into the stable dispersion liquid of the inorganic nanometer particles prepared in the step (a) to be stood for 10 to 24 hours at the indoor temperature and then is dried for 4 to 20 hours at 100-200 DEG C to obtain the expanded graphite / metal oxide composite. The method has simple production technology, low cost and has high industrial application value.

The invention relates to a titanium-dioxide-doped composite magnetic nano-grade adsorbent, a preparation method thereof, and an application thereof. The adsorbent comprises the raw materials of iron salt, ferrous salt, and titanium salt, wherein the mass ratio of the iron salt to the ferrous salt to the titanium salt is 2:(1-10):(0.01-0.6). The absorbent provided by the invention has good dispersity and adjustable doping amount. The absorbent has excellent photocatalytic activity of powdery nano-grade titanium dioxide. When ultraviolet light is adopted as a light source, and pollutants such as trivalent arsenic in water can be removed by oxidation without the addition of auxiliary agents. The adsorbent has relatively high magnetism. The absorbent with absorbed pollutants can be separated and recovered by using an external magnetic field method, and the recovery is easy. Therefore, the absorbent, the method and the application have good industrial application values.

The invention relates to a heterogeneous catalyst used in one-step reaction of synthesizing vanillin through catalytic oxidation of 4-methyl-2-metoxyphenol. A Co(x)Mn(y)M(z)O(1-x-y-x) type heterogeneous catalyst is prepared by adopting cobalt and manganese as active components and adding one or more of elements, such as aluminum, silicon, cerium, zirconium, niobium and the like as cocatalysts, and using an alkaline solution as a precipitator through using a coprecipitation process. Under the action of the catalyst, oxidization is carried out by adopting oxygen or air, the reaction is carried out for 5 hours under a pressurizing condition, the transfer rate of the 4-methyl-2-metoxyphenol can reach 100 percent, and the yield of the vanillin can reach 85 percent. The catalyst has the advantages of simpleness in preparation and low cost, is easy to separate and recycle after the reaction, and is capable of completely replacing homogeneous catalysts of cobalt, copper salts and the like applied to the modern industry. Meanwhile, the catalyst has the advantages of less reaction solution side products after the catalytic oxidation reaction, simpleness in treatment, environment protection performance, and stronger application prospect in the preparation process of the vanillin.

The invention discloses a catalyst used for catalytically oxidizing NO and a preparation method thereof. Manganese oxide and copper oxide are taken as active components of the catalyst and titanium dioxide is taken as a carrier. The manganese oxide and copper oxide which belong to P-type semiconductors are taken as the active components, thereby obviously promoting the activity of the catalyst atlow temperature and meanwhile overcoming the problem of steam and SO2 influence on the catalyst easily caused by a single active component. The catalyst has the advantages that the cost is low, the preparation process is simple, the environment is protected, the assistance of other external condition is unnecessary in a catalytic reaction process, the industrial application value is high, and thecatalyst can be applied to a catalytic oxidation-chemical absorption method for treating the SO2 and NOx in fire coal smoke.

The invention provides a novel method for preparing propiolic acid compounds through a domino reaction. The method comprises a step of subjecting terminal alkyne compounds, hydrosilane and CO2 to thedomino reaction under the catalysis action of Lewis base so as to obtain propiolic acid compounds. According to the invention, common Lewis base is used as a promoter, and corresponding propiolic acidcompounds containing different function groups can be efficiently produced through a reaction of the terminal alkyne compounds with hydrosilane and normal-pressure CO2 under a mild condition (a temperature of 40 DEG D). According to the method, CO2 is used as a raw material; the cheap Lewis base is used as the promoter; usage of precious metals is avoided; the domino reaction is employed; purification and separation of intermediates are not needed; and reaction conditions are mild. Thus, the method is an efficient cheap green synthetic method and has good industrial application value.

The invention discloses a vibration suppression method for a steel rail welding head straightness detection system. The vibration suppression method comprises the following steps of S1, establishing a servo motor mathematical model, performing Laplace conversion on the servo motor mathematical model, and combining with a current ring to obtain a servo motor transfer function; S2, establishing a drive system mathematical model according to a relation between working platform displacement and servo motor output displacement, and performing Laplace conversion on drive system mathematical model to obtain a transfer function of a working platform; and S3, an input instruction, after being subjected to input shaping in the steps S1 and S2, and PID regulation in a servo motor control link, controlling the drive system to move. By adoption of the vibration suppression method, noise signals in detection data and data processing difficulty can be reduced while the detection efficiency and detection result accuracy are improved; and the vibration suppression method is wide in applicable range, simple in design, and relatively high in industrial application value.

The invention discloses an axisymmetric comb-shaped inner fin structure and a fin tube thereof. The inner fined structure comprises a centre rib, and a plurality of inner fin pairs. The plurality of inner fin pairs are arranged on the centre rib vertically and integrated forming with the centre rib. One inner fin pair comprises two inner fins, and the two inner fins are arranged in an axial symmetry mode along the centre rib. The fine tube comprises the axisymmetric comb-shaped inner fin structure and an outer tube arranged out of the axisymmetric comb-shaped inner fin structure. The inner wall shape of the outer tube are matched with with the external shape of the axisymmetric comb-shaped inner fin structure. The outer tuber is in interference fit with the axisymmetric comb-shaped inner fin structure. The axisymmetric comb-shaped inner fin structure and a fin tube thereof have the advantages that the high-temperature gas is divided into a plurality of heat transfer zones, a radial distribution gas temperature gradient mode in a traditional heat exchanger element is changed effectively, a heat transfer effect of the inertia heat transfer zone in the traditional heat exchanger element center is improved, and the maximization of the uniformity of the cross-section temperature field is achieved.

The invention provides a built-in sorbent floating head type adsorbent bed refrigeration unit. The refrigeration unit comprises an adsorbent bed, an insulation connective closed body, a condenser, an adiathermance connective closed body and an evaporator, wherein the adsorbent bed is formed by at least two outer fin tubes; the sorbent is solidified on the inner wall of the outer fin tubes of the adsorbent bed; a mass transfer channel is arranged in the center of the outer fin tubes of the adsorbent bed; the condenser is formed by at least two outer fin tubes; the evaporator is formed by at least one outer fin tube; upper ends of the outer fin tubes of the adsorbent be are closed; lower ends of the outer fin tubes of the adsorbent bed are communicated with the upper end of the insulation connective closed body; the lower end of the insulation connective closed body is communicated with upper ends of the outer fin tubes of the condenser; lower ends of the outer fin tubes of the condenser are communicated with the upper end of the adiathermance connective closed body; the lower end of the adiathermance connective closed body is communicated with the upper end of the outer fin tube of the evaporator; and the lower end of the outer fin tube of the evaporator is closed. The refrigeration unit has scientific structure design, strong capability of adapting to reversed heat stress, does not leak in operation, and has prominent adsorbent refrigeration effect.

The invention relates to a halohydrin dehalogenase mutant for improving enantioselectivity and application thereof, and belongs to the technical field of enzyme engineering and biocatalysis. The halohydrin dehalogenase mutant is obtained by carrying out single-point mutation or combined mutation on 89th arginine, 137th valine, 178th proline, 179th asparagine and 187th phenylalanine in a sequence as shown in SEQ ID NO.1. Compared with wild type halohydrin dehalogenase, the mutant obtained by the invention obviously improves enantioselectivity (E value) during the preparation of (S)-o-nitrophenyl glycidyl ether, (R)-benzyl glycidyl ether and (R)-phenyl glycidyl ether, the maximum improvement is 44.6, 2.9 and 9.4 times of the original enzyme respectively, and has good industrial application prospect.

The invention relates to a catalyst for flue gas denitration, and a preparation method and an application thereof. The catalyst is composed of a carrier, an active component and an assistant, the carrier is titanium dioxide, the active component is iron element, the assistant is europium element, and a molar ratio of the iron element to the europium element to the titanium element is 0.15:0.02:1.The preparation method of the catalyst is mainly a co-precipitation method. The finally prepared catalyst can treat nitrogen oxides in exhaust gas discharged from a gas turbine for power generation and a coal-fired boiler, can significantly improve the activity and catalytic ability of low-temperature denitration, makes the nitrogen oxide removal rate at 250 DEG C achieve 90% or above, has great industrial application values, and can be widely used for the NH3-selective catalytic reduction of nitrogen oxides.

The invention provides a preparing method of a key intermediate 1-(3-benzoyloxy propyl)-5-(2-oxopropyl)-7-indolinecarbonitrile for synthesizing Silodosin. Materials in the whole synthetic route are cheap and easy to obtain, reaction steps are few, the operation is simple, the operation cost is low, yield coefficients of all reaction steps are far higher than those of the existing synthetic route, the preparation method is quite suitable for industrial production and is provided with high industrial application values.

The invention discloses a 2-cyclohexene-1-ketone preparation method which comprises the following steps: (1) performing a 1-8 hours' reaction on a raw material which comprises alkyl vinyl ether, a 1,3-dicarbonyl compound and formaldehyde at 50-110 DEG C, and performing separation to obtain a 2-alkoxyl-3,4-dihydropyran derivative, wherein the molar ratio of the 1,3-dicarbonyl compound to the alkyl vinyl ether is (3-1):(1-3), and the molar ratio of the 1,3-dicarbonyl compound to formaldehyde is 1:(1-3); (2) putting the 2-alkoxyl-3,4-dihydropyran derivative obtained in the step (1) in an acid alcohol medium for a 1-8 hours' reaction at 0-100 DEG C, so as to obtain 2-cyclohexene-1-ketone. Compared with the conventional cyclohexene oxidation and cyclohexanone bromination methods, the 2-cyclohexene-1-ketone preparation method provided by the invention has the advantages of being high in reaction selectivity, easy for product separation, low in environmental pollution, very high in industrial application value, and the like.

The invention provides a method for synthesizing 2,5-dihydroxybenzaldehyde. The method comprises the following steps: with p-dimethoxybenzene as a raw material, carrying out bromination reaction, Grignard reaction and demethylation reaction to obtain the 2,5-dihydroxybenzaldehyde. The preparation conditions are mild, the process is simple, and the industrial application value is high.

The invention discloses a polyvinyl chloride elastomer containing fumed silica. The polyvinyl chloride elastomer is prepared from the following raw materials in parts by mass: 65-75 parts of polyvinylchloride, 20-30 parts of nitrile rubber, 14-22 parts of filler, 6-10 parts of plasticizer, 1-3 parts of a flame retardant, 1-2 parts of an antistatic agent and 0.6-1 part of a foaming agent. Variousproperties of the fumed silica-containing polyvinyl chloride elastomer prepared by the preparation method disclosed by the invention meet index requirements in GB / T 8815-2008 plasticized polyvinyl chloride compounds for wire and cable, and the fumed silica-containing polyvinyl chloride elastomer has good thermal stability, light stability, insulativity, flame retardancy, antistatic property, thermal insulation property and mechanical properties. Besides, the polyvinyl chloride elastomer containing fumed silica prepared by the invention can be used for preparing underground cables, overhead cables and other wires and cables, the preparation process flow is simple, and the polyvinyl chloride elastomer containing fumed silica has very strong industrial application value and development prospect.

The present invention provides process of selecting proper hetero atom to modify the skeleton of Y-type molecular sieve and to raise the heat stability and hydrothermal stability of Y-type molecular sieve. The process includes direct hydrothermal crystallizing, adding proper amount of hetero atom to prepare MY-type molecular sieve containing skeleton hetero atom, performing the secondary ion exchange and secondary roasting of MY-type molecular sieve after adding small amount of hetero atom in the same kind to obtain USMY type molecular sieve with very high heat stability and hydrothermal stability. The molecular sieve with very high heat stability and hydrothermal stability is applied in the catalysts for catalytic cracking, hydrogenation cracking, etc of hydrocarbons.

The invention discloses a synchronous measurement data-based distribution network regional positioning method. According to the method, a fault region is determined according to the generalized eigenvalues of a historical dataset covariance matrix and an online dataset covariance matrix, and a set threshold confidence interval. The method specifically includes the following steps that: the fluctuation degree of the covariance ratio of monitoring point data is determined according to muPMU real-time data configured by a whole network; whether a fault occurs is judged according to judgment on whether the fluctuation degree exceeds the set threshold confidence interval; and a fault area is determined according to an abnormal change degree sequence. With the method of the invention adopted, the problem of the location of a fault area where load characteristics, network topology, line parameters, and distributed power source output are not completely known can be solved, and requirements for distribution network relay protection under a distributed source power connection condition can be satisfied.

The invention discloses a method for synthesizing methyl p-bromo-methyl benzoate through channelization and a reaction device. The method comprises the steps: methyl p-methyl benzoate is taken as a raw material, bromine generated by oxidizing hydrobromic acid through hydrogen peroxide is taken as a bromination reagent, materials are continuously input into an efficient mixer through a metering pump to be mixed and then enter a pipeline reactor, a reactant is subjected to a bromination reaction in the pipeline reactor through temperature control and illumination and then collected by a receiving tank, and after an obtained reaction solution is quenched, separated, dried, concentrated and subjected to recrystallization purification, a pure methyl p-bromo-methyl benzoate product is obtained.The bromination reaction has the high bromine atom utilization rate, fewer byproducts and fewer solid wastes, and conforms to the concept of green chemistry; and a continuous pipeline reaction is goodin safety, short in reaction time and high in production efficiency, and has industrial production and application value.

A transparent projection film comprises a transparent base material layer and a lens layer, wherein the lens layer is compounded on the base material layer and comprises a plurality of prism units. The plurality of prism units are integrally formed or integrally connected, and hollow grooves are formed between the prism units; and each prism unit comprises a first side face, a second side face anda top face, wherein the top face is located between the first side face and the second side face and opposite to the base material layer. The transparent projection film mainly comprises the base material layer and the lens layer. When the surface of each prism unit is frosted, the transparent projection film can be used as a rear projection screen; and when a reflecting layer is arranged on thesurface of the prism unit, the transparent projection film can be used as a front projection screen. Compared with the prior art, the transparent projection film is very simple in structure and very easy to process and implement, and can achieve a projection effect basically similar to that of an existing projection screen, so that the transparent projection film has very high industrial application value and very high practicability.

The invention relates to a method for preparing epoxy chloropropane, and belongs to the technical field of organic synthesis. The method comprises the following steps: (1) weighing calcium hydroxide and sodium hydroxide, mixing the weighed calcium hydroxide and sodium hydroxide with water, and carrying out stirring for forming a soda lime emulsion for later use, wherein the mass of the water is 200-400% of the mass of the calcium hydroxide, and the mass of the sodium hydroxide is 3-18% of the calcium hydroxide; (2) placing a crude glycerol chlorination crude product in an ice water bath, adding the soda lime emulsion prepared in the step (1) while stirring, keeping the temperature at 0-5 DEG C for 0.5-1 hour firstly, then carrying out heating slowly to a reaction temperature, carrying outstanding after saponification is completed, carrying out cooling and reduced pressure suction filtration, regulating the pH value to neutral, and carrying out reduced pressure distillation to obtain asolution containing epoxy chloropropane and a separated solid. The method provided by the invention has cheap raw materials and simple operation process, the obtained product is easily separated, andthus the method has an industrial value.

The invention discloses a method for realizing comprehensive recovery of valuable elements in an aluminum-based petroleum refining catalyst by utilizing reducing gas. The method comprises the following steps that spent catalyst is preatreated by adopting a reduction heat treatment process, and the three kinds of valuable metal elements in the spent catalyst generate an aluminum salt capable of being dissolved in water, metal elementary substance nickel cobalt with magnetism and acid solubility, and acid-resistant and alkali-resistant rare metal low-valence oxide, a simple substance or a carbide correspondingly, so that the property difference of the valuable elements compound to be recycled is expanded; the aluminum oxide is extracted by using an aqueous solution or an alkali solution, thenickel and cobalt are extracted through magnetic separation or acid solution leaching, and the rare metals are enriched and recycled in the leaching residues. The method has the advantages that the process is simple and reasonable, the used reducing agent is economic and environment-friendly, efficient separation and comprehensive recovery of the valuable elements in the spent catalyst can be realized at the same time, and the economic benefits are remarkable and the like.

The invention provides a moisture-absorbing and quick-drying finishing method for a cotton knitted fabric, and relates to the technical field of textile processes. The method comprises the following steps: pretreating a fabric, padding the pretreated fabric by using a moisture-absorbing and quick-drying finishing agent, drying the padded fabric, rolling the dried fabric, enabling water-repellent microcapsules in the moisture-absorbing and quick-drying finishing agent to be broken and a water repellent to enter the fabric, and baking at high temperature to obtain the moisture-absorbing and quick-drying fabric. Countless micro water-repellent points are formed on the surface and inside of the fabric, spreading of water on the surface of the fabric is facilitated, permeation of the water into fibers is reduced, the water can be rapidly spread on the surface of the fabric, and therefore the evaporation rate of the cotton fabric is increased, and the good moisture-absorbing and quick-drying finishing effect is achieved.