344 results about "Activated alumina" patented technology

The invention discloses a method for harmlessly treating lithium slag and preparing a water-stable material from the treated lithium slag. The method comprises the following steps: crushing the lithium slag; mixing a sulfuric acid-containing material with the crushed lithium slag to obtain a pulpified mixture; roasting, and carrying out chemical modification to obtain roasted slag; adding a material containing activated aluminum oxide into the roasting slag to obtain a mixed material; the mixed material is subjected to water leaching and filtering, and leaching residues and leaching liquid are obtained; and drying the leaching slag, adding an exciting agent, and grinding to finally obtain the detoxified lithium slag. And preparing the water-stable material from the detoxified lithium slag. Under the condition of effectively improving the quality of the cement-stabilized layer, the lithium slag resource is effectively utilized, the resource utilization rate is improved, and the mechanical strength and corrosion resistance of the cement-stabilized layer concrete can be effectively improved by matching with the exciting agent and the curing agent.

A modular porous swale. The modular porous swale may comprise a porous concrete block and filtration joint. The porous concrete block may snugly fit within a trench having a lower portion filled with an absorption media. The absorption media may include gravel, activated alumina, bone char, biochar, bone char and activated alumina mixture, and biochar and activated alumina mixture. The porous concrete block may have a top surface inwardly-sloped to a nadir. The filtration joint may be disposed within the porous concrete block and along the nadir. The liner may cover one or more sides of the porous concrete block. The perforated pipe may be located within the absorption media. The filtration joint may substantially align above a portion of the perforated pipe when the modular porous swale is installed within the trench.

The invention relates to a preparation method and application of a porous material for preparing methanol through carbon dioxide adsorption and conversion. When the material is prepared, firstly, 4, 4 '4' '-(1, 3, 5-triazine-2, 4, 6-trimethylene) triphenylamine and 1, 2-acenaphthequinone are treated in a mixed solvent containing dioxane / acetonitrile / 6M acetic acid, and AT-COF is obtained; further synthesizing by adopting an impregnation method to obtain IrRu-COF; and finally, uniformly mixing the active gamma-aluminum oxide and the IrRu-COF material to form a carrier dispersion liquid, and then carrying out PEI loading, vacuum impregnation, washing and drying to obtain the PEI functionalized gamma-Al2O3 / COF composite catalyst. The technical closed loop from low-concentration CO2 capture to solar driven conversion is realized, the process flow is simple, and the energy consumption is low.

The invention provides a lithium-supplementing composite additive, a lithium-supplementing positive pole piece for inhibiting flatulence and application, and belongs to the field of lithium ion batteries. The lithium supplementing composite additive is a mixture of a lithium supplementing agent and aminated aluminum oxide, the mass ratio of the lithium supplement agent to the aminated aluminum oxide is (6-10): (3-5); the aminated aluminum oxide is activated aluminum oxide modified by an amino organic matter; the mass ratio of the amino organic matter to the activated aluminum oxide is 3: (7-12); the lithium supplement agent is hydroxyl cycloenone dilithium salt or lithium carboxylate. The lithium-supplementing positive pole piece capable of inhibiting flatulence comprises a current collector, an active coating and a functional coating located on the surface of the active coating, and the functional coating contains a lithium-supplementing composite additive and has the functions of supplementing lithium, absorbing acid and inhibiting flatulence. The method is characterized in that the aminated alumina matrix can absorb hydrofluoric acid in an electrolyte, and the aminated group can absorb carbon dioxide generated by decomposition of a lithium supplement agent. The method can reduce the problem of battery cycle gas expansion in the use process of the lithium supplement agent, and improves the battery cycle and safety performance.

The invention belongs to the field of hydrometallurgy, and particularly discloses a high-purity vanadium oxide electrode and a preparation method thereof. The method comprises the following steps: pre-treating the alkaline vanadium leaching solution by using an activated aluminum oxide adsorption column to obtain a pre-treated solution; adding a composite impurity removal agent taking modified lignosulfonate as a main agent into the pretreatment liquid for primary impurity removal to obtain primary impurity-removed filtrate; adding a calcium hydroxide suspension and a flocculating agent into the primary impurity-removed filtrate for secondary impurity removal to obtain secondary impurity-removed filtrate; purifying the secondary impurity-removed filtrate by using an ion exchange column to obtain a purified solution; ammonium salt is added into the purified liquid for vanadium precipitation, and ammonium metavanadate crystals are obtained; calcining the ammonium metavanadate crystal to obtain high-purity vanadium pentoxide; and preparing the high-purity vanadium oxide electrode by using the high-purity vanadium pentoxide. According to the scheme, the high-purity vanadium pentoxide is prepared by taking the alkaline vanadium leaching solution as a raw material through a multi-stage deep impurity removal process, and the high-purity vanadium oxide electrode is prepared by taking the alkaline vanadium leaching solution as the raw material.

The utility model discloses a multi-layer screening device for activated aluminum oxide processing, and relates to the technical field of activated aluminum oxide processing, the multi-layer screening device comprises a screening machine body, the screening machine body comprises a plurality of screening boxes which are fixedly connected up and down, and the multi-layer screening device further comprises a cleaning assembly; the cleaning assembly comprises a cleaning part movably arranged in the screening box and an adjusting part fixedly connected to the cleaning part and used for adjusting the vertical height of the cleaning part. The cleaning part comprises a plurality of cleaning plates movably arranged in the screening box, a soft cleaning brush is fixed to each cleaning plate, the soft cleaning brushes are connected with the inner bottom end face of the screening box in an abutting mode, elastic scraping plates are fixed to the two ends of each cleaning plate, the elastic scraping plates are connected with the inner wall of the screening box in a sliding mode, and a driving piece is arranged on each cleaning plate; the problem that in the prior art, in the screening machining process of activated aluminum oxide, due to the viscidity of the activated aluminum oxide, the activated aluminum oxide adheres to a screen, the screen is blocked, and the screening effect is reduced is solved.

The invention belongs to the technical field of refractory materials, and particularly relates to a dispersion breathable refractory brick and a production process thereof. The dispersion breathable refractory brick is prepared from the following raw materials in parts by mass: 50-60 parts of silicon / titanium coated corundum particles, 30-40 parts of corundum particles, 15-20 parts of alumina micro powder, 8-12 parts of magnesium oxide micro powder, 3-5 parts of activated alumina micro powder, 1-3 parts of niobium pentoxide, 4-8 parts of phenolic resin and 3-5 parts of water. The prepared dispersion breathable refractory brick has the advantages of being high in slag corrosion resistance, good in thermal shock resistance, high in mechanical property and the like.

The invention discloses a corundum high-strength wear-resistant castable, which belongs to the field of castable, and comprises a raw material, an auxiliary material, a binding agent and an additive, the raw material is corundum aggregate, and the auxiliary material comprises corundum fine powder, mullite fine powder, an inorganic non-metallic material and stainless steel fiber, the binding agent comprises calcium aluminate cement, hydrated alumina, silica sol, aluminum dihydrogen phosphate and refractory clay, and the additives comprise sintered spinel fine powder, silica micropowder, activated alumina micropowder, zirconia micropowder, a coagulant, a retarder, a dispersant, a flocculant, a plasticizer, a water-retaining agent, an anti-settling agent and a preservative. The corundum high-strength wear-resistant castable is prepared by mixing the raw materials, the auxiliary materials, the binding agent and the additive, so that the corundum high-strength wear-resistant castable has excellent strength, wear resistance, fire resistance and thermal shock resistance during use, and further the actual use effect and performance of the corundum high-strength wear-resistant castable are ensured; and the service life of the product is prolonged.

The invention relates to the field of refractory materials, in particular to a dry ramming mass for an intermediate frequency furnace and a preparation method thereof.The dry ramming mass is prepared from, by weight, 45-55 parts of fused corundum, 8-12 parts of fused magnesia, 15-20 parts of tabular corundum, 3-5 parts of fused spinel, 3-4 parts of activated aluminum oxide, 1-2 parts of silicon carbide, 1-2 parts of silica sol and 0.5-1 part of boric acid. 3.5-4.5 parts of a binding agent and 3-5 parts of an anti-penetrating agent; wherein the anti-penetrating agent is chromium oxide coated nickel aluminate microspheres. The invention solves the two major problems of easy penetration and thermal shock peeling of the traditional furnace lining, is especially suitable for harsh smelting environments of high manganese steel, stainless steel and the like, and has long service life and convenience in construction.

The invention discloses a method for degrading gold cyanidation tailings through photo-Fenton of an aluminum-based bimetallic catalyst, and belongs to the technical field of cyanidation tailings treatment. Iron salt and zinc salt are loaded on activated aluminum oxide through an impregnation method, the aluminum-based bimetallic catalyst is obtained through the treatment processes of roasting, grinding, drying and the like, and iron oxide and zinc ferrite contained in the synthesized aluminum-based bimetallic catalyst are main active substances for degrading cyanide residues through photo-Fenton catalysis; under the participation of hydrogen peroxide and an ultraviolet light source, the concentration of cyanide in the cyanide residues can be remarkably reduced, toxicity detection on the reacted filter residues shows that the concentration of the cyanide is lower than the national standard, and the cyanide residues can be treated as general solid waste; the cyanide removal rate can reach 95% or above, and the method has a very good application prospect.

The invention discloses a vacancy isolation preparation method of monodisperse nano alpha alumina, and relates to the technical field of new materials, alpha alumina can be obtained through heat treatment of various activated alumina, but the alpha alumina can be obtained while alumina of other crystal forms is converted into alpha alumina. Generally accompanied by the process of combining and growing other crystal forms of nano-crystalline grains into wormlike alpha-type aluminum oxide crystalline grains, the nano-alpha-type aluminum oxide of less than 100 nanometers is difficult to obtain in a phase inversion manner. According to the preparation method, rho aluminum oxide which can be hydrated to obtain nano-particles is used as a raw material, through adsorption and desorption of lithium chloride, a hydration product is subjected to volume expansion, vacancies left after desorption of lithium ions change a conversion path of phase conversion to alpha aluminum oxide, and combination and growth (hard agglomeration) of crystal grains are prevented; therefore, the monodisperse nano alpha-type aluminum oxide can be efficiently prepared on a large scale.

The spinel light-weight castable is prepared by the following steps: intensively and uniformly mixing 40-80 parts by weight of light-weight aggregate, 3-10 parts by weight of activated alumina powder, 2-8 parts by weight of light-burned magnesia powder, 10-20 parts by weight of ceramic fibers and 2-8 parts by weight of magnesium aluminate spinel hollow spheres, adding 5-10 parts by weight of a composite binder, 0.5-1 part by weight of a hardening agent and 5-8 parts by weight of water, uniformly stirring again, and carrying out casting molding to obtain the spinel light-weight castable. And curing at room temperature for 24-48 hours, demolding and baking to obtain the lightweight castable which has the advantages of good anti-stripping performance, burst resistance, low heat conductivity coefficient and high strength and can serve at 1350-1600 DEG C.

The invention relates to the field of suction cups, and discloses a porous suction cup with gradient-distributed pores and a preparation method of the porous suction cup. Adding glue into the powder and granulating; performing dry pressing and preforming; carrying out secondary cold isostatic pressing molding; discharging glue and sintering; and finish machining to obtain a final product. The prepared porous sucker with the gradient-distributed pores has the advantages that the porosity gradient is controllable, and the adsorption effect is maximized, under the same negative pressure condition, the higher the porosity of the material is, the larger the pore diameter is, the larger the generated adsorption force is, and the multi-formula powder is integrally formed in a regional mode, so that the production efficiency is greatly improved. The content of the pore-forming agent and the particle size of the low-activity aluminum oxide in the formula are gradually adjusted from the inner ring to the outer ring, so that the porosity and the pore diameter of each area of the sintered green body are regulated and controlled, and the porosity of the inner ring and the outer ring of the suction cup can be regulated and controlled in a stepped manner within the range of 15-50% and the pore diameter of 10-100 microns; and the problem that the edge of the wafer is easy to deform due to insufficient edge adsorption force is avoided.

The invention belongs to the technical field of waste plastic resource utilization, and discloses preparation and application of a polypropylene thermochemical chain gasification hydrogen production oxygen carrier taking an activated alumina ball as a carrier. The oxygen carrier comprises an active component and a carrier skeleton, the active component is selected from one or two metal oxides of iron, cobalt, nickel and copper, and the carrier framework is selected from an active alumina ball with the diameter of 3-5mm. The polypropylene thermochemical chain gasification hydrogen production oxygen carrier with the activated alumina balls as the carrier has high selectivity and good stability on polypropylene steam gasification hydrogen production reaction at high temperature, the oxygen carrier preparation method is simple, the cost is low, and large-scale industrial production can be carried out.

The invention discloses an aldehyde-removing inorganic artificial stone and a preparation method thereof. The aldehyde-removing inorganic artificial stone comprises the following raw materials in parts by weight: 20-30 parts of cement, 5-15 parts of an auxiliary cementing material, 40-50 parts of building solid waste, 10-20 parts of industrial tailings, 1-2 parts of a photocatalyst, 2-4 parts of activated aluminum oxide, 1-3 parts of zeolite powder, 1-2 parts of a water reducing agent, 1-2 parts of water and 3-6 parts of a toughening agent, by adding the photocatalyst nano titanium dioxide, formaldehyde can be effectively degraded under the action of natural light, the removal rate reaches 90% or above, and the indoor air quality is remarkably improved; the manufacturing process is very simple and easy to implement, the formaldehyde degradation rate of 90% or above can be achieved with the low doping amount of the photocatalyst, the overall manufacturing cost is low, and the efficient formaldehyde degradation rate can be obtained; in addition, the preparation process is simple, large-scale production is easy, and the production efficiency and the compactness of the plate can be improved through single-piece vacuum high-frequency vibration compression molding.

The invention discloses a quartz fiber toughened aluminum-carbon refractory material and a preparation method thereof, and belongs to the technical field of aluminum-carbon refractory materials. The refractory material comprises a main material, quartz fibers and a binding agent, the main material comprises the following components in percentage by weight: 65-70% of sintered tabular corundum particles, 10-15% of sintered tabular corundum fine powder, 5-10% of carbon black, 1-3% of boron carbide, 1-6% of activated aluminum oxide and 4-8% of silicon powder; the addition weight of the quartz fiber is 0.1-0.9% of the weight of the main material; the adding weight of the binding agent is 3-5% of the weight of the main material. The preparation method comprises the following steps: heating and uniformly mixing carbon black, boron carbide, activated aluminum oxide, silicon powder, quartz fibers and a part of binding agent in a closed strong stirrer, adding the rest raw materials, mixing, kneading, ageing, mechanically pressing, drying, and carrying out segmented heat preservation and heat treatment in a carbon-buried atmosphere, thereby obtaining the high-strength silicon-carbon composite material. And finally, the aluminum-carbon refractory material with high strength, good toughness, excellent thermal shock resistance and long high-temperature service life is prepared.

The invention relates to the technical field of filtration and purification of special ceramics and aluminum industrial melts, and discloses a corundum-mullite ceramic filter plate and a preparation method of the corundum-mullite ceramic filter plate. Comprising the following components in parts by weight: 30-50 parts of corundum, 3-7 parts of silica fume, 10-15 parts of kyanite, 10-15 parts of activated alumina powder, 3-5 parts of borax, 8-16 parts of silica sol, 0.5-1.5 parts of citric acid and 0.1-0.3 part of a sintering aid. In the formula system, mullite and aluminum borate which are synthesized under high-temperature sintering are used as binding agents of inert materials, and the binding agents are not subjected to erosion reaction with alloy elements in high-temperature molten aluminum and have good mechanical strength and thermal shock performance; the kyanite part generates volume micro-expansion after being subjected to mullitization, a special structure is formed in an internal pore channel structure of the ceramic filter plate, impurity components in high-temperature molten aluminum can be adsorbed, and the filter precision of the ceramic filter plate is improved.

The invention relates to a method for extracting lithium from a lithium-containing sodium aluminate solution and preparing lithium carbonate, and belongs to the technical field of lithium recovery. The method comprises the following steps: adding an extracting agent into a lithium-containing sodium aluminate solution, and carrying out extraction reaction to obtain a lithium-removed sodium aluminate solution and a lithium-rich extracting solution; carrying out reverse extraction on the lithium-rich extraction liquid by taking water as a reverse extraction agent to obtain a lithium-containing solution; adding activated aluminum oxide into the lithium-containing solution, and carrying out adsorption reaction to obtain solid-phase aluminum oxide; eluting the solid-phase aluminum oxide with acid to obtain a lithium-rich solution; and adding a carbon source into the lithium-rich solution, and sequentially precipitating, separating and washing to obtain lithium carbonate. According to the method, a complex impurity removal process does not need to be carried out on the lithium-containing sodium aluminate solution, the high-concentration lithium salt solution is obtained after the lithium ions are directly extracted from the lithium-containing sodium aluminate solution and then are subjected to reverse extraction, adsorption and desorption, and industrial-grade lithium carbonate can be obtained by supplementing a carbon source, so that the preparation cost of the lithium carbonate is greatly reduced. The method has the advantages of good selectivity, high recovery rate, cyclic continuous production, economy and environmental protection.

The present invention provides an activated alumina and a preparation method and application thereof. The preparation method of activated alumina comprises the following steps: (1) mixing aluminum hydroxide mixed powder and pseudo-boehmite, placing the mixture in a ball-forming disk, balling the mixture by a rotating disk ball-forming method, spraying a binder during the ball-forming process, and preparing activated alumina balls with a diameter of 1-3 mm; (2) pressurizing the activated alumina balls to obtain pressurized activated alumina microspheres; (3) hydrating and steam curing the pressurized activated alumina balls; (4) gradient calcining the steam-cured activated alumina balls, soaking the calcined activated alumina balls in water for 60-65 hours, and then rotary evaporating the calcined activated alumina balls in a rotary evaporator at 85-90° C. and a rotation speed of 130-140 r / min to obtain activated alumina. The activated alumina balls prepared by the present invention have high specific surface area and pore volume, high strength, low wear rate, and good high temperature resistance.

The invention relates to a chlorine dioxide sustained-release ball, which relates to the technical field of environmental protection and disinfection, and comprises an activated alumina ball and an inorganic porous layer from inside to outside, wherein the activated aluminum oxide ball is loaded with sodium chlorite and a porous film, and the inorganic porous layer is loaded with the porous film. The chlorine dioxide sustained-release ball disclosed by the invention realizes the goals of high load, long period, constant-speed release and stable physical form.

The invention discloses a low-expansion ceramic cookware blank with low water absorption and high thermal shock resistance and a preparation method of a cookware product. The blank is prepared from the following raw materials: 25 to 45 weight percent of fused quartz, 5 to 10 weight percent of potassium feldspar powder, 15 to 25 weight percent of washing mud, 10 to 20 weight percent of knar clay, 8 to 12 weight percent of chlorite, 3 to 7 weight percent of ball clay, 5 to 10 weight percent of microcrystalline glass leftover material and 5 to 10 weight percent of activated aluminum oxide. The ceramic blank is sintered at the temperature of 1240-1260 DEG C. The water absorption rate of the obtained cookware product is 4.5-5.8%, the expansion coefficient alpha (800-20 DEG C) is less than or equal to 1.6 * 10 <-6 > / DEG C, and the thermal shock resistance is that the cookware product does not crack after being cooled by water for five times at the temperature of 460-20 DEG C. Through formula design, the technical problem that in the prior art, a fused quartz formula system is large in water absorption is solved, the prepared ceramic pot product is low in water absorption, thermal shock resistance and other properties are remarkably improved, the use requirements of low-expansion ceramic products such as a heat-resistant pot can be well met, and the requirements for matched use of electric appliances, high-temperature resistance and the like can be met. And the technical progress and application development of the low-expansion ceramic industry can be promoted.

The present invention discloses a vertical continuous calcination furnace for activated alumina balls, which comprises a vertical furnace body. The top of the furnace body is a feed inlet, and the bottom is a discharge outlet. A hot air distributor is installed in the middle of the vertical furnace body. The hot air distributor is provided with a number of air distribution holes, and the hot air distributor is connected to a burner. The burner provides hot air for the interior of the vertical furnace body through the hot air distributor. An air extraction port is provided at the top of the vertical furnace body, and the air extraction port is connected to an induced draft fan. The hot air enters downward from the middle and lower part of the furnace body and turns back upward under the action of the induced draft fan to heat the balls.

The present invention discloses a method for preparing dimethyl disulfide by methyl mercaptan sulfidation, which includes: (1) loading a yttrium-modified alumina catalyst in a shell-and-tube fixed-bed reactor, and then filling a solution of dimethyl disulfide and / or dimethyl polysulfide into the shell-and-tube fixed-bed reactor; (2) mixing liquid methyl mercaptan and liquid sulfur evenly through a pipeline mixer and continuously introducing them into the bottom of the shell-and-tube fixed-bed reactor to carry out a sulfidation reaction to generate a crude sulfide including dimethyl disulfide, dimethyl polysulfide, and hydrogen sulfide gas; (3) successively passing the crude sulfide through a first-stage, a second-stage, and a third-stage distillation column to remove hydrogen sulfide, methyl mercaptan, and dimethyl polysulfide respectively, so as to obtain high-quality dimethyl disulfide. The present invention uses a yttrium-modified activated alumina catalyst, which can greatly improve the activity of the catalyst and its selectivity for dimethyl disulfide, and make the single-pass conversion rate of dimethyl disulfide reach more than 90%.

The present invention relates to a carbon-coated cloth for efficiently absorbing VOCs in the air and a preparation method thereof, comprising: ball-milling a mixture of first activated carbon and water until the activated carbon particles are evenly distributed, adding a modifier, and dispersing the mixture through ultrasonic impregnation to obtain a spray liquid; spraying the spray liquid onto a receiving substrate and drying it to obtain a highly absorbent skeleton layer; uniformly mixing a second activated carbon and activated alumina impregnated with an active component to obtain an adsorbent material; laying a first hot-melt adhesive web on the unsprayed surface of the highly absorbent skeleton layer, hot-pressing the surface, and then flattening the adsorbent material, followed by laying a second hot-melt adhesive web and hot-pressing and fixing it, and finally laying a melt-blown cloth to obtain the carbon-coated cloth. The present invention achieves high performance in high-humidity environments by disposing coconut shell activated carbon having a pore structure dominated by mesopores and carrying highly absorbent groups upstream of the receiving substrate. Furthermore, the moisture content of the VOCs in the mixed gas decreases after passing through the receiving substrate, and the active component also facilitates their adsorption on the microporous activated carbon.

The utility model discloses an activated aluminum oxide quantitative conveying device, and relates to the field of conveying devices.The activated aluminum oxide quantitative conveying device comprises a charging barrel, a discharging assembly used for controlling the weight is arranged on the charging barrel, the discharging assembly comprises a discharging pipe fixedly connected to the bottom end of the charging barrel, and a first electromagnetic valve is installed at the bottom end of the discharging pipe; the upper end and the lower end of the side wall of one side of the discharging pipe are fixedly connected with first fixing blocks, and a threaded rod is rotatably connected between the two first fixing blocks. Through cooperative arrangement of the threaded rod, the quantitative cylinder, the moving block and other structures, during use, the threaded rod is driven to rotate through the rotating assembly, the position of the quantitative cylinder on the discharging pipe is adjusted, and the capacity of the quantitative cylinder is adjusted; then the first electromagnetic valve is opened to convey materials in the charging barrel into the quantitative barrel through the discharging pipe, then the first electromagnetic valve is closed, the second electromagnetic valve is opened to discharge the materials in the quantitative barrel for conveying, and the problem that the applicability is reduced due to the fact that the one-time conveying amount of activated aluminum oxide cannot be controlled according to requirements is avoided as much as possible.

This application relates to the field of organic synthesis technology, specifically disclosing a process for preparing tert-butyl vinyl ether. The raw materials include solid tert-butanol, acetylene, tetrahydrofuran solvent, and potassium hydroxide catalyst, supplemented with auxiliary materials such as type 3A molecular sieves and activated alumina adsorbents. The preparation method involves: after dehydration and purification of the raw materials, the materials are introduced into a reaction vessel; temperature and pressure are controlled, and the reaction endpoint is monitored using an infrared spectrometer; byproducts are quenched and acetylene is recovered; the process involves multi-stage condensation, water washing to remove impurities, distillation separation, and solvent purification and recycling, with simultaneous integration of waste heat recovery and continuous material feeding. The tert-butyl vinyl ether prepared by this process, as an important fine chemical intermediate, can be used in coatings, adhesives, and polymer material modification, possessing advantages such as high purity and good stability. The preparation method achieves efficient utilization of materials and energy through multi-stage synergistic linkage, combining the advantages of green environmental protection, continuous and stable operation, and high resource utilization.

The invention belongs to the technical field of purification and regeneration of industrial oil products, and relates to a composite adsorbent for regeneration of phosphate fire-resistant oil and a preparation method of the composite adsorbent. The catalyst comprises the following components in percentage by mass: 40-60% of a mesoporous silicon-aluminum molecular sieve, 20-35% of surface modified activated aluminum oxide, 10-20% of organic alkali functionalized silica gel and 3-8% of a metal deactivator. According to the invention, the overall adsorption capacity and selectivity of various degradation products in the phosphate fire-resistant oil are obviously improved, and the adsorption loss of effective components of the base oil is effectively reduced.

The invention discloses a synthesis process of tungsten hexafluoride, and relates to the technical field of special gas synthesis. The process comprises the following steps: mixing ammonium fluoride and hydrofluoric acid to prepare an activation solution, carrying out ultrasonic activation treatment on tungsten powder to obtain pretreated tungsten powder, and reacting the pretreated tungsten powder with fluorine gas at a certain temperature and pressure to prepare a liquefied crude product tungsten hexafluoride; the preparation method comprises the following steps: by taking aluminum sec-butoxide and the like as raw materials, carrying out sol-gel and ethanol supercritical drying and calcining to prepare highly porous activated aluminum oxide; gasifying the crude tungsten hexafluoride, adsorbing with activated aluminum oxide, and rectifying to obtain purified tungsten hexafluoride liquid; and finally, dissolving in liquid sulfur dioxide, treating under illumination with the wavelength of 395nm, and carrying out distillation separation to obtain high-purity tungsten hexafluoride. According to the method, the activation pretreatment is combined with multi-stage purification, so that the purity and the synthesis efficiency of tungsten hexafluoride are remarkably improved.

The application discloses a novel white clay bed, which comprises a bed body (6), a liquid inlet (1) arranged at the lower part of the bed body (6), a liquid outlet (7) arranged at the upper part of the bed body (6), a liquid distributor (2) arranged above the liquid inlet (1), a coalescence water removal filler (3), a baffle (4) and a honeycomb-shaped integrated regenerant (5) arranged above the liquid distributor (2) in sequence. The novel white clay bed can eliminate the secondary powder formed by the mutual friction of active alumina particles in the white clay bed, greatly reduce the water entrained by the working liquid into the white clay bed, prolong the service life of the regenerant and be favorable to the stable operation of a hydrogen peroxide device.

The invention relates to the technical field of soil thermal desorption, and discloses an organic matter contaminated soil thermal desorption device which comprises a first storage tank used for storing soil and calcium oxide and a second storage tank used for storing pulverized coal. Pollutants can be effectively absorbed and fixed, and the problem that the pollutants are easy to release again in the treatment process is avoided, so that the treatment efficiency and safety are improved; the mixer is respectively communicated with the discharge port of the first storage tank and the discharge port of the second storage tank, the first storage tank can add soil and calcium oxide into the mixer, and the second storage tank can add pulverized coal into the mixer; the heat carrier heater is used for adding a heat carrier into the mixer through a pipeline, the heat carrier of the heat carrier heater can adopt activated aluminum oxide ceramic balls and coke, and the mixer is used for fully mixing soil, calcium oxide, pulverized coal, the activated aluminum oxide ceramic balls and the coke in the mixer, so that the soil is uniformly distributed; the problem of non-uniform heat transfer in thermal desorption treatment is solved.