640 results about "Hydrotalcite" patented technology

The invention provides an acetylacetone-based composite thermal stabilizer which is a mixture obtained by mixing zinc acetylacetonate, calcium acetylacetonate or magnesium acetylacetonate and hydrotalcite pro rata. The composite thermal stabilizer is suitable for chloride-containing high polymer, such as polyvinyl chloride, chlorinated polyethylene, chlorinated polyvinyl chloride, copolymer of vinyl chloride-ethylene or copolymer of vinyl chloride-vinyl acetate, has better thermal stability, prolongs the thermal aging time of the chloride-containing high polymer, and overcomes the shortcomings of poor long-term performance of single stabilizer of zinc acetylacetonate, poor transparency of stabilizer of calcium acetylacetonate, and poor initial colorability of stabilizer of hydrotalcite. The composite thermal stabilizer has low cost, good initial colorability, excellent long-term performance and good transparency, and is an efficient composite thermal stabilizer.

This invention discloses a method for preparing a CuZnAlGa-based layered double hydroxide (TLH)-derived catalyst for methanol production from carbon dioxide-rich syngas. Using Cu, Zn, Al, and Ga metal salts as precursors, Na₂CO₃ and NaOH as precipitants, and a mixed alcohol-water solution as an auxiliary solvent, co-precipitation is performed under controlled temperature and pH to obtain a LDH-like catalyst precursor. After high-temperature calcination and in-situ reduction in a hydrogen atmosphere, a layered framework structure of Cu nanoparticles immobilized by oxides is obtained. The LDH-like structure provides lattice confinement, preventing Cu particle aggregation, and the interaction between Cu and the oxides enhances the catalyst surface's adsorption capacity for CO and CO₂, thereby improving the activity and stability of methanol production from carbon dioxide-rich syngas.

The invention relates to the technical field of catalyst materials, and particularly discloses a high-stability hydrogenation catalyst and a preparation method thereof. The invention relates to a preparation method of a high-stability hydrogenation catalyst, which comprises the following steps: preparing a hollow porous microsphere as an inner core from amino-terminated hyperbranched polyaryletherketone and polyvinyl alcohol, and then coating the porous microsphere with a mesoporous silicon dioxide intermediate layer by a sol-gel method; and finally, forming an Mg-Al hydrotalcite layer on the outermost side through a coprecipitation method, dipping and modifying with La (NO3) 3 and Ce (NO3) 3 solutions to obtain a catalyst carrier, dipping the catalyst carrier in an active metal dipping solution, and drying to obtain the catalyst. The high-stability hydrogenation catalyst provided by the invention has excellent mechanical properties and more reaction active sites, has high catalytic activity and catalytic efficiency, and is relatively long in catalytic life.

The invention relates to the technical field of sealing strips, in particular to an anti-aging ethylene propylene diene monomer rubber sealing strip and a preparation method thereof. Comprising the following components in parts by weight: 150-180 parts of ethylene propylene diene monomer, 60-90 parts of carbon black, 8-12 parts of white carbon black, 3-8 parts of a peroxide vulcanizing agent, 6-12 parts of zinc oxide, 12-16 parts of magnesium-aluminum hydrotalcite, 10-18 parts of a plasticizer, 1-3 parts of a crosslinking aid, 1-3 parts of calcium stearate, 1-3 parts of an anti-aging agent and 1-3 parts of a silane coupling agent. The anti-aging agent is a mixture of an anti-aging agent AN245 and an anti-aging agent MBZ. By adding the anti-aging agent, the aging resistance of the ethylene propylene diene monomer can be remarkably improved by inhibiting oxidation and delaying the aging process, a high-crosslinking-density three-dimensional network is formed through the peroxide vulcanizing agent, breakage of molecular chains at high temperature is reduced, thermal aging is delayed, and the ethylene propylene diene monomer sealing strip with excellent aging resistance is prepared.

The invention relates to a spherical hydrotalcite phase desulfurization adsorbent as well as a preparation method and application thereof, the preparation method comprises the following steps: mixing an iron source, a nickel source and organic carboxylate, and then carrying out hydrothermal carbonization reaction to obtain the spherical hydrotalcite phase desulfurization adsorbent. The nickel source and the iron source are selected as the raw materials, hydroxide radicals of laminates and carbonate ions between the laminates of the prepared hydrotalcite phase desulfurization adsorbent can increase the alkalinity of the surface of the desulfurization adsorbent and improve the adsorption capacity to hydrogen sulfide, and meanwhile, the hydrotalcite phase desulfurization adsorbent can react with hydrogen sulfide in a catalytic oxidation manner, so that the removal efficiency is improved. Organic carboxylate is selected as a hydrothermal auxiliary agent, carboxylate radicals can chelate metal ions through multidentate coordination to form a stable complex, so that the nucleation rate of hydrotalcite is delayed, the particle size uniformity is improved, meanwhile, a carbon coating layer is generated through hydrothermal carbonization, and pores in the carbon coating layer and pores in hydrotalcite can form hierarchical pore channels, so that the composite material is prepared. The mass transfer efficiency is synergistically improved, so that the adsorption capacity of the adsorbent is improved.

The invention discloses carbon-based material loaded hydrotalcite synergistically modified composite rubber asphalt which comprises the following components in percentage by mass: asphalt, rubber powder, a dispersing agent, a retarder, carbon-based material loaded hydrotalcite, an antioxidant and a heat stabilizer. The carbon-based material loaded hydrotalcite, the antioxidant and the heat stabilizer are compounded, so that the ultraviolet aging resistance, the oxidation aging resistance and the mechanical strength of the composite rubber asphalt can be remarkably improved, the limitation of a single modified material is effectively overcome, and the service life of an asphalt road is greatly prolonged.

The invention discloses a porous CoFe hydrotalcite nano material as well as a preparation method and application thereof, and relates to the field of nano materials. The porous CoFe hydrotalcite nano-material is of a porous layered double hydroxide nano-structure, and the aperture of the porous CoFe hydrotalcite nano-material ranges from 2 nm to 10 nm. The porous CoFe hydrotalcite nano material is prepared through a microwave hydrothermal synthesis method, the preparation method is simple, easy to operate and environmentally friendly, and industrial production can be achieved. The porous CoFe hydrotalcite nano material prepared by the method is stable in structure, has photocatalytic activity and peroxidase-like activity, can effectively catalyze and generate various reactive oxygen free radicals under the illumination condition, realizes efficient synergistic killing of bacteria, and has a good antibacterial effect.

The invention discloses a high-temperature-resistant flame-retardant CPVC power cable protection pipe and a preparation method thereof, and relates to the technical field of cable protection pipes. The high-temperature-resistant flame-retardant CPVC power cable protection pipe at least comprises the following raw materials in parts by mass: 100 parts of chlorinated polyvinyl chloride; 15 to 25 parts of high impact resistance type MCS resin; 8 to 12 parts of poly (1, 2-propylene glycol adipate); 12 to 20 parts of a sepiolite-methyl methacrylate-butyl acrylate compound; 8-15 parts of aluminum-titanium composite coupling agent modified magnesium-aluminum-lanthanum hydrotalcite; 3-6 parts of a rare earth composite heat stabilizer; 2-4 parts of a processing aid; 0.5 to 1.5 parts of an antioxidant; and 1-2 parts of a lubricant. The prepared high-temperature-resistant flame-retardant CPVC power cable protection pipe has high heat resistance, high flame retardance and high impact resistance, and is excellent in comprehensive performance, high in safety and reliability and long in service life.

The invention discloses an efficient treatment process for salt-containing industrial wastewater, and relates to the technical field of wastewater treatment. Salt-containing industrial wastewater sequentially passes through an adjusting tank, a silicon and hardness removal unit, a biochemical unit, a secondary sedimentation tank, a fluorine removal unit, a filter unit, a catalytic ozonation unit, a moving bed bio-membrane reactor treatment unit, a powder carbon sedimentation unit and an ultrafiltration-reverse osmosis double-membrane unit to be treated, produced water is recycled, and concentrated water enters an evaporation and concentration unit; the silicon removal and hardness removal unit is used for treating the wastewater by adding a flocculating agent and a composite coagulant aid; the flocculating agent is a chitosan-based flocculating agent, and the addition amount of the flocculating agent is 10 to 20 mg / L; the composite coagulant aid is composed of a magnesium-aluminum hydrotalcite coagulant aid and alginic acid-silicate hybrid microgel according to the mass ratio of 2: (1-4), and the addition amount of the composite coagulant aid is 5-15 mg / L. The treatment effect of the salt-containing industrial wastewater is remarkably improved.

The invention relates to a method for relieving soil salinization through combination of agriculture and forestry solid waste and hydrotalcite and application, and belongs to the technical field of soil improvement. The method comprises the following steps: stripping surface saline-alkali soil, crushing agriculture and forestry solid wastes, spreading the crushed agriculture and forestry solid wastes on the land to form a biomass layer, mixing hydrotalcite powder roasted at a high temperature with the stripped soil, covering the biomass layer with the mixture, and finally flattening and sprinkling water to moisten the soil. According to the invention, rising of soil capillary water is blocked through the biomass layer, salt accumulation is reduced, and meanwhile, the soil salinization degree is reduced by utilizing adsorption and ion exchange effects of hydrotalcite. In addition, the agriculture and forestry solid wastes are decayed to generate organic acid, salt is fixed through chelation, and the soil structure is improved. According to the method, soil salinization can be effectively relieved, the air permeability and the water permeability of the soil can be improved, a good environment is provided for crop growth, the crop yield is remarkably increased, the improvement period is short, the application range is wide, and economic benefits are remarkable.

The present invention provides a silica / hydrotalcite composite slow-release fertilizer and a preparation method thereof, comprising the following steps: uniformly mixing amorphous silica, a divalent metal salt, a trivalent metal salt, and water to obtain a mixed solution; subjecting the mixed solution to a hydrothermal reaction, followed by filtering, washing, and drying to obtain a silica / hydrotalcite nanocomposite material; calcining the silica / hydrotalcite nanocomposite material to obtain a silica / metal oxide nanocomposite material; and loading inorganic and organic fertilizers onto the silica / metal oxide nanocomposite material to obtain a silica / hydrotalcite composite slow-release fertilizer. This preparation method is simple, highly feasible, low-cost, and easily scalable for industrial production. The layered and pore-channel structure of the silica / hydrotalcite nanocomposite material effectively provides ample space for the loading of nutrients, thereby improving the slow-release efficiency of nutrients in the fertilizer, increasing nutrient utilization efficiency, reducing fertilization frequency, and minimizing potential environmental impacts.

The invention relates to the technical field of solid waste resource utilization, in particular to aluminum-based hydrotalcite synthesized through solid waste coal gangue in-situ crystallization and a preparation method and application of the aluminum-based hydrotalcite. The preparation method comprises the following steps: (1) mixing coal gangue with acid and water, stirring at 80-95 DEG C for 0.5-3 hours to remove impurities, filtering, washing and drying to obtain impurity-removed coal gangue; (2) roasting the impurity-removed coal gangue at 600-850 DEG C for 0.5-5 hours to obtain roasted coal gangue microspheres; and (3) mixing and reacting the roasted coal gangue microspheres with calcium salt / magnesium salt, acid and water, dripping alkali to adjust the pH value to be 7-9, aging, strengthening the phase seed crystal, dripping alkali to adjust the pH value to be 10-12, crystallizing at 100-150 DEG C for 12-72 hours, and post-treating to obtain the product. According to the method, coal gangue is used as an aluminum source, the crystallinity of aluminum-based hydrotalcite is improved, the cost is reduced, and solid waste recycling is achieved. The product can be used for flue gas desulfurization or used as an FCC sulfur transfer agent, has excellent desulfurization and sulfur transfer performance, and has a wide application prospect.

The invention relates to the technical field of catalysts, and provides a catalyst and a preparation method thereof, and an application of the catalyst in carbon dioxide-based degradable plastics, the catalyst is a supported catalyst, and comprises a carrier and an active component; the carrier comprises ternary hydrotalcite, and the active component comprises double metal cyanide and a rare earth yttrium complex; the raw material of the double metal cyanide comprises a cyano coordination compound; the cyano coordination compound comprises potassium hexacyanomanganate and / or potassium hexacyanocobaltate. According to the technical scheme, the problems of low yield and more byproducts when the catalyst is used for catalyzing and preparing the carbon dioxide-based degradable plastic in the related technology are solved.

The invention discloses a catalyst for preparing cyclohexanone by cyclohexanol dehydrogenation coupled phenol hydrogenation, the catalyst has a composite metal hydrotalcite structure, the metal components comprise ruthenium, magnesium and aluminum, the metal components are uniformly dispersed in hydrotalcite, and the ruthenium, the magnesium and the aluminum respectively account for 1-5wt%, 10-30wt% and 1-10wt% of the total mass of the catalyst. The acid-base property, the specific surface area and the pore structure of the catalyst are optimized by adjusting the ratio of magnesium to aluminum, so that the dispersion of ruthenium is improved, the interaction between ruthenium and a hydrotalcite carrier is increased, and the synergistic effect of all the element components enables active centers in cyclohexanol dehydrogenation, hydrogen transfer and phenol hydrogenation processes to be efficiently combined together, so that the catalytic activity of the catalyst is improved. Rich alkaline sites are generated in the catalyst, the dehydration side reaction of cyclohexanol can be effectively inhibited, meanwhile, the selectivity of cyclohexanone prepared through phenol hydrogenation is improved, it is ensured that the phenol hydrogenation reaction and the cyclohexanol dehydrogenation reaction can be effectively coupled, and cyclohexanone is efficiently prepared.

The invention relates to the technical field of cables, and provides a high-weather-resistance power cable. The high-weather-resistant power cable comprises a cable core and an outer sheath, the outer sheath is prepared from the following raw materials in parts by weight: 40 to 50 parts of low-density polyethylene, 25 to 35 parts of ethylene-vinyl acetate copolymer, 20 to 30 parts of ethylene propylene diene monomer, 10 to 12 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer, 16 to 20 parts of ZrO2 coated modified hydrotalcite, 15 to 20 parts of magnesium hydroxide, 4 to 6 parts of silane coupling agent, 2 to 3 parts of dicumyl peroxide and 3 to 5 parts of zinc oxide; 6 to 10 parts of conductive carbon black, 0.8 to 1 part of antioxidant and 1 to 1.5 parts of zinc stearate. According to the cable prepared in the invention, the protection performance, the service life and the safety of an existing high-weather-resistance power cable under extreme weather conditions are improved, and the mechanical property of the cable is also improved.

The invention relates to the technical field of thermal transfer printing ink, in particular to anti-migration high-stability thermal transfer printing ink as well as a preparation process and application thereof. The anti-migration high-stability heat transfer printing ink is obtained by uniformly mixing the water-based acrylic resin, the pigment, the defoaming agent, the flatting agent, the thickening agent and the epoxy modified organic silicon resin, then adding the modified hydrotalcite and the kaolin, and uniformly mixing. The anti-migration high-stability heat transfer printing ink is prepared from the following components in parts by weight: 80 to 100 parts of waterborne acrylic resin, 10 to 20 parts of epoxy modified organic silicon resin, 20 to 30 parts of pigment, 10 to 20 parts of modified hydrotalcite, 5 to 8 parts of kaolin, 1 to 3 parts of flatting agent, 2 to 4 parts of defoaming agent and 1 to 3 parts of thickening agent. The anti-migration high-stability thermal transfer printing ink prepared by the invention has relatively high adhesive force and relatively low mobility, and can be stably attached to the surface of a base material.

The invention discloses a method for preparing a porous carbon / hydrotalcite-like compound adsorbent from fine coal gasification slag, which comprises the following steps: by taking the fine coal gasification slag as a raw material, sequentially carrying out alkali activation desiliconization and ion regulation, adding a pH regulator, stirring, and carrying out one-pot hydrothermal synthesis to obtain the porous carbon / hydrotalcite-like compound adsorbent. And carrying out solid-liquid separation and washing on the hydrothermal composition to obtain a solid phase, namely the porous carbon / hydrotalcite-like compound adsorbent. According to the invention, the pore structure of carbon is expanded while alkali activation desiliconization is carried out, so that the formation of porous carbon is ensured; the porous carbon / hydrotalcite-like compound adsorbent meets the requirement of forming a hydrotalcite-like compound with better crystallinity through ion regulation and control, provides an alkaline environment for synthesizing the hydrotalcite-like compound by adding a pH regulator, ensures the formation of the hydrotalcite-like compound through one-pot hydrothermal synthesis, and is obtained through solid-liquid separation and washing, the aggregation state in the hydrotalcite-like compound synthesis process is improved, and the stability and adsorption active sites of the composite adsorption material are increased.

The invention discloses a high-ammonia-nitrogen wastewater treatment process, and belongs to the technical field of pyridine wastewater treatment, and the high-ammonia-nitrogen wastewater treatment process comprises the following steps: preparing hydrotalcite: weighing cobalt nitrate, magnesium nitrate and aluminum nitrate, adding distilled water, and stirring to obtain a salt solution; weighing sodium hydroxide and anhydrous sodium carbonate, adding distilled water, and stirring to obtain alkali liquor; pumping the salt solution and the alkali solution into a round-bottom flask, and heating and dispersing the round-bottom flask on an oil bath pan; putting the ground sample into a ceramic crucible, calcining in a muffle furnace, weighing a silver-ammonia solution and acetaldehyde, and pouring into a round-bottom flask; the pyridine wastewater is weighed, the hydrotalcite is added, stirring adsorption is performed for 20 min, the hydrogen peroxide is added, suction filtration is performed after the reaction, and the hydrotalcite is filtered and separated out for recycling. The problem that existing wastewater treatment is difficult is solved. The method has the advantages of high catalytic activity, easiness in recovery and reutilization of hydrotalcite, no need of adding any auxiliary chemical reagent, mild reaction conditions, low cost and convenience in operation, and can meet the requirements of industrial production.

The invention provides a long-acting anticorrosive epoxy powder coating and a preparation method thereof. The coating comprises epoxy resin, polyester resin, thiadiazole corrosion inhibitor loaded cerium-doped hydrotalcite composite particles, silane modified mica iron oxide, zinc phosphate, barium sulfate and the like. The core innovation lies in that 2-amino-5-(4-hydroxyphenyl)-1, 3, 4-thiadiazole corrosion inhibitor molecules are designed and synthesized, the molecules are loaded between cerium-doped magnesium-aluminum hydrotalcite nano container layers through an anion exchange method, corrosion environment pH responsive gradient release is achieved, a coating constructs a passive shielding, active corrosion inhibition and interface anchoring triple protection mechanism in the coating, and the corrosion resistance of the coating is improved. The neutral salt spray test resistance exceeds 2000h, and the coating is suitable for long-acting corrosion protection of iron accessories and cable bridges.

The invention relates to the field of packaging materials, and particularly discloses a transparent high-barrier film and a preparation method thereof. The transparent high-barrier film comprises a matrix film and chitin nanofiber films positioned on two sides of the matrix film, the matrix film is prepared from the following raw materials in parts by weight: 50 to 80 parts of PBAT resin, 20 to 30 parts of PLA resin, 25 to 40 parts of modified poly epsilon-caprolactone, 0.5 to 1 part of compatilizer, 0.1 to 1 part of antioxidant, 15 to 25 parts of filler and 0.5 to 0.8 part of nucleating agent; the modified poly (epsilon-caprolactone) is prepared from the following raw materials in parts by weight: 80 to 100 parts of epsilon-caprolactone, 3 to 5 parts of cellulose nanofiber, 2.5 to 3 parts of halloysite aluminum-magnesium-loaded hydrotalcite, 100 to 120 parts of ionic liquid and 1 to 2 parts of catalyst. The transparent high-barrier film disclosed by the invention not only has excellent oxygen and water vapor barrier properties, mechanical properties and good biodegradability, but also has the light transmittance of 90% or above.

The invention provides a soilless phase reservoir protection water-based drilling fluid as well as a preparation method and application thereof, and belongs to the technical field of drilling fluids. The drilling fluid is prepared from the following raw materials in parts by mass: 100 parts of water, 0.2-0.4 part of a first pH regulator, 1-3 parts of a deoxidant, 0.1-0.4 part of a tackifying and shear strength improving agent, 2-4 parts of a filtrate reducer, 4-6 parts of magnesium-aluminum hydrotalcite, 4-6 parts of micro-nano aluminum oxide, 4-6 parts of superfine calcium carbonate, 4-6 parts of a lubricant, 1-2 parts of a corrosion inhibitor and 70-660 parts of an inorganic salt weighting agent. The drilling fluid disclosed by the invention is excellent in high-temperature resistance, good in rheological property and excellent in filtrate loss reduction performance; the drilling fluid disclosed by the invention can be prepared into saturated CaCl2 and saturated CaBr2 systems, does not contain barite and clay, is high in mud cake acid solubility, has permeability recovery of more than 72% after plugging, is good in reservoir protection, and has potential of on-site large-scale application.

The utility model discloses a mixing device for producing magnesium-aluminum hydrotalcite, which comprises a mixing tank body, a main pipe is rotatably mounted in the middle of the mixing tank body, and a stirring device is mounted on the main pipe; a second feeding pipe is horizontally and fixedly mounted at the bottom of the main pipe, an inner runner of the second feeding pipe is communicated with an inner runner of the main pipe, and a plurality of second spray heads are arranged at the lower end of the second feeding pipe; a material mixing channel is vertically arranged on one side of the mixing tank body, and the bottom of the material mixing channel is communicated with the bottom of the mixing tank body, so that mixed liquid in the material mixing channel flows into the bottom in the mixing tank body; a conveying auger is arranged at the top of the mixing channel, and a first feeding pipe and a feeding hopper are sequentially arranged above the feeding end of the conveying auger in the conveying direction. According to the magnesium-aluminum hydrotalcite mixing device, mixing is carried out twice, stirring is more thorough, the mixing effect is good, and the purity of magnesium-aluminum hydrotalcite can be guaranteed.

The invention provides a Z-type heterojunction material for synchronously removing phosphorus and tetracycline in sewage. The material is composed of a hexagonal flaky nano magnesium-aluminum-iron hydrotalcite matrix with the size of 30-100 nm and a metal oxide growing on the surface. The preparation method of the material comprises the following steps: carrying out hydrothermal treatment on magnesium-aluminum-iron hydrotalcite and trimesic acid in N-N dimethylformamide liquid, growing a metal organic framework compound on the surface of the magnesium-aluminum-iron hydrotalcite in situ through dissolved-out metal ions and trimesic acid, and roasting the metal organic framework compound to obtain the Z-type heterojunction material. The Z-type heterojunction material can synchronously and efficiently remove phosphorus and tetracycline in sewage, the synchronous removal rates of 50 mg of the material to phosphorus and tetracycline are 97.60% and 95.47% respectively in 100 mL of a phosphorus (concentration of 25 mg / L) water sample and a tetracycline (concentration of 50 mg / L) water sample, and the synchronous removal rates of phosphorus and tetracycline are still 87.62% and 85.57% after continuous circulation for five times. The Z-type heterojunction material can be applied to the aspect of phosphorus and tetracycline mixed sewage treatment in the breeding industry.

The invention relates to a cobalt-aluminum-zinc hydrotalcite assembled membrane catalyst as well as a preparation method and application thereof. The catalyst is composed of an assembled film and cobalt-aluminum-zinc hydrotalcite, wherein the molar ratio of Co to Al to Zn in the cobalt-aluminum-zinc hydrotalcite is 1: (1-2): (1-2), and the mass ratio of the cobalt-aluminum-zinc hydrotalcite in the assembled membrane catalyst is 35%-55%. Through a specific vacuum-assisted flocculation assembly method, the characteristic of high specific surface area of the hydrotalcite material is maintained, and rich active sites are provided for the processes of catalytic reaction, adsorption separation and the like. The preparation process of the catalyst comprises preparation of CoAlZn-LDH and preparation of a CoAlZn-LDH assembled film, the process not only improves the catalytic efficiency, but also optimizes the mechanical strength and thermal stability of the catalyst through introduction of the assembled film, and can maintain the stability of the structure and performance under harsh conditions.

Toner includes toner particles containing a binder resin and an external additive, wherein 1) the binder resin contains a polyester A in an amount of 50% by mass or more, and the polyester A contains a unit Uiso derived from isophthalic acid in an amount of 90% by mole or more based on all units derived from an acid component, and 2) the toner contains hydrotalcite particles as the external additive.

The invention discloses a preparation method of manganese-based hydrotalcite and application of the manganese-based hydrotalcite in removing thallium pollution. According to the invention, the manganese-based hydrotalcite is prepared by adopting a nucleation crystallization method by accurately regulating and controlling the hydrotalcite laminate element composition, the interlayer ion species and the atomic proportion. The prepared manganese-based hydrotalcite realizes high-selectivity specific adsorption of thallium pollutants through surface hydroxyl complexing, interlayer anion exchange, electrostatic interaction and oxidation-reduction reaction. Even in a complex adsorption environment, such as interference of different pH values, various common metal cations and organic matters, the manganese-based hydrotalcite can still keep the adsorption efficiency higher than 95%, and in a natural water environment, thallium pollutants can be effectively reduced to be lower than the national surface water discharge standard (0.1 microgram / L).

The invention provides a preparation method of a hydrotalcite-derived cobalt-copper catalyst and application of the hydrotalcite-derived cobalt-copper catalyst in furfural hydrogenation reaction. A series of different layered composite metal oxide precursors are prepared through coprecipitation and ion exchange methods, the layered composite metal oxide precursors are applied to furfural hydrogenation reaction after being pre-reduced, and the reaction with pentanediol and furfuryl alcohol as target products shows excellent catalytic activity. By designing the element composition and structural distribution of the hydrotalcite precursor, the composition, the structure and the physical property of the catalyst are effectively modulated, and the distribution of hydrogenation products is effectively regulated and controlled. The furfural can be completely converted on the Co < 1.5 > Cu < 0.25 > Al < 0.5 > Ox catalyst, and the yield of the product pentanediol reaches 68.8%; the yield of the product furfuryl alcohol reaches 98% on the basis of the Co < 1.5 > Cu < 0.25 > Al < 1.75 > catalyst. Characterization results of the catalyst show that the hydrogenation performance of the catalyst strongly depends on sample element composition, valence states of active species Cu and Co, structural distribution and dispersity of the active species Cu and Co in a precursor and a synergistic effect among different species.

The invention discloses a bottom mud ecological restoration material as well as a preparation method and application thereof. The material is composed of a degradable carrier, a treatment flora and a multifunctional filler. The carrier is porous particles die-cast by corn straws and the like; the treatment flora comprises photosynthetic bacteria, bacillus and nitrifying bacteria; the filler is prepared from non-nitrate type hydrotalcite-like compounds, calcium nitrate, nitrate type hydrotalcite-like compounds and a flocculating agent according to a specific mass ratio. The preparation method comprises the following steps: carrying out pressure casting on the carrier, adsorbing the flora, and rolling the filler to form balls. The restoration method comprises the steps that a river channel is cut off in the dry season to form a closed area, materials are put according to the area ratio of 10: 1 for preliminary restoration, and after standing is conducted for 1-5 days, the materials are put along with water flow according to the area ratio of 2: 1 for deep restoration. Through the physical, chemical and biological synergistic effect, the sediment redox environment can be effectively improved, pollutant release and degradation are promoted, operation is easy and convenient, and the risk of secondary pollution is low.

The invention relates to the technical field of shield muck treatment, in particular to a preparation method of a high-carbon-sequestration shield muck baking-free brick, which comprises the following steps: mixing quick lime and steel slag micropowder in proportion, adding water, controlling the temperature, and standing to form an alkaline activated material; uniformly spreading the calcium-aluminum-iron-loaded red mud-based hydrotalcite on the surface of the alkaline activated material, and spraying slurry of carbide slag and water to form a hierarchical carbon sequestration precursor; after standing, adding water into the modified charcoal loaded with calcium magnesium phosphate and a water reducing agent, pre-stirring to form slurry, and adding the slurry into a hierarchical carbon sequestration precursor at a constant speed; adding the premixed original-state shield muck and a curing agent into the hierarchical carbon sequestration precursor, then adding high-calcium cement and fly ash, and stirring; after compression molding, curing and post-curing through a damp-heat curing and gradient pressurizing carbonization process to obtain the baking-free brick. A hierarchical precursor is constructed by quick lime, steel slag, red mud-based hydrotalcite and the like, and modified charcoal is combined, so that active ions are promoted to be dissolved out and uniformly distributed, the CO2 reaction efficiency is enhanced, and the carbon sequestration effect is improved.

A toner including: a toner particle containing a binder resin; and an inorganic fine particle, wherein the inorganic fine particle contains a strontium titanate fine particle A, a silica fine particle B, and a hydrotalcite particle C, Si is present at a surface of the strontium titanate fine particle A, and a value Si / Sr of a mass ratio of Si to Sr, which is detected in a fluorescent X-ray analysis of the strontium titanate fine particle A, satisfies the following formula (1); 0.20≤Si / Sr≤0.60 . . . (1).