750 results about "Aluminum salts" patented technology

The invention discloses alumina-coated granules, as well as a preparation method and application thereof. The alumina-coated granules consist of cores and shells which coat the cores. The cores are made of at least one of materials of metals, oxides, metal hydroxides, metal inorganic salts, non-metals, carbides, nitrides, lithium salts, semiconductors and organic compounds; the shell is made of Al2O3. By adopting a liquid phase method, the cores to be coated are mixed with aluminum salts, metal aluminum is precipitated by producing an alkaline environment in situ or externally adding alkaline, so that uniform, continuous and controllable coating can be formed on the surfaces of the cores. The coating method provided by the invention is simple, and has mild conditions and high universality; the coating layer has controllable thickness, completeness and uniformity; the alumina-coated granules has high practicability and a great application prospect in the field of catalysis, lithium ion batteries, surface-enhanced Raman, biomedicine and the like.

The invention discloses a high-activity and high and medium oil type hydrocracking catalyst and a preparation method thereof. The catalyst comprises hydrogenation active metals and a carrier containing modified Y molecular sieves, amorphous silicon aluminum and alumina, wherein the modified Y molecular sieves have high crystallinity, large silicon aluminum ratio and proper total acid amount and acid distribution, and are obtained by treating Y molecular sieves after hydro-thermal treatment by a mixed aqueous solution of aluminum salts and an acid. The hydrocracking catalyst has high activity and good intermediate distillate oil selectivity and product quality, and is particularly suitable for hydrocracking technology for producing intermediate distillate oil.

The invention discloses a hydrocracking catalyst for producing heavy naphtha in great abundance and a preparation method thereof. The catalyst contains hydrogenation active metals and a carrier which consists of modified Y molecular sieves and alumina, wherein the Y molecular sieves are obtained by using a mixed aqueous solution of aluminum salts and an acid to perform hydro-thermal treatment. The properties of the modified Y molecular sieves are as follows: the specific surface area is between 750 m<2>/g and 850 m<2>/g; the total pore volume is between 0.35 and 0.48 ml/g; the relative crystallinity is between 90 and 130 percent; the cell parameter is between 2.437 and 2.445 nanometers; the silicon-aluminum mol ratio is between 15 and 70; the infrared acid amount is between 0.5 and 1.0 mmol/g; the B acid/L acid is more than 7.0; and the content of sodium oxide is less than or equal to 0.05 weight percent. The hydrocracking catalyst has the characteristics of good catalytic activity, high heavy naphtha selectivity, high yield, high latent content of heavy naphtha arene, and so on.

The invention discloses a method for preparing an aluminum oxide coated modified lithium nickel cobalt manganese oxygen cathode material. The method comprises the following steps of: (1) preparation of a precursor: mixing water-soluble metallic nickel salt, cobalt salt and manganese salt into a mixed solution, dripping the mixed solution, a precipitator and a morphological control agent into a reaction container, controlling the pH value and reaction temperature of a system, and performing filtering, washing and vacuum drying after reaction to obtain a (NixCoyMn1-x-y)(OH)2 precursor, wherein x, y and x+y are more than 0 and less than 1; (2) preparation of an aluminum oxide coated precursor: dispersing the (NixCoyMn1-x-y)(OH)2 precursor, water-soluble aluminum salt and a disperser into deionized water, stirring while heating until the disperser is hydrolyzed, filtering to obtain an Al(OH)3-coated (NixCoyMn1-x-y)(OH)2 precursor, roasting the precursor in a sintering furnace to obtain Al2O3-coated (NixCoyMn1-x-y)(OH)2 precursor powder; and (3) uniformly mixing the Al2O3-coated (NixCoyMn1-x-y)(OH)2 precursor powder with lithium salt powder, and calcinating at high temperature to obtain an aluminum oxide coated modified Li(NixCoyMn1-x-y)O2 cathode material with a lamellar crystal structure.

The invention discloses gamma-alumina particles and a method for manufacturing the same. The method includes co-precipitation procedures implemented in a step 1) and a step 2), a hydrothermal ageing procedure implemented in a step 3), a spray-drying procedure implemented in a step 4) and a heating procedure implemented in a step 5) so that the gamma-alumina particles are manufactured. The gamma-alumina particles and the method have the advantages that the procedures for manufacturing the gamma-alumina particles are simple, and follow-up treatment procedures required by a common hydrothermal method are omitted; cheap soluble aluminum salt is used as a raw material during manufacture, and accordingly the cost is low; as verified and tested by experiments, the manufactured gamma-alumina particles are high in specific surface area which ranges from 180m<2>/g to 260m<2>/g; the manufactured gamma-alumina particles have hollow foam-shaped morphological structures when observed under a scanning electron microscope and are of micropore-mesopore-macropore composite aperture structures, so that active components in catalysts can be effectively dispersed by the hollow foam-shaped morphological structures of the gamma-alumina particles when gamma-alumina is used as a carrier of the catalysts; and material transmission in a catalytic procedure is facilitated by the hollow foam-shaped morphological structures and the composite aperture structures, and accordingly the catalytic reaction rate is increased.

The invention discloses a composite reagent for treating recycled water of printing and dyeing wastewater and an application method of the composite reagent. The composite reagent comprises the following components by weight percent: 20% to 70% of aluminum salt coagulant, 5% to 30% of iron salt coagulant, 5% to 40% of mineral material and 5% to 45% of activated carbon. The method comprises the following steps: preparing the composite reagent for treating the recycled water of the printing and dyeing wastewater into powder or an aqueous liquid in which the content of effective components accounts for 5% to 30%; regulating a pH value of effluent in a printing and dyeing wastewater biochemical system to be within 3 to 9; adding the powder or the aqueous liquid of the composite reagent into the effluent in the printing and dyeing wastewater biochemical system under the condition that the adding quantity of the effective components is between 20mg/L and 1000mg/L after the pH value of the effluent is regulated; and stirring for 0.2 to 2 hours and then standing so as to obtain the recycled water conforming to the water quality standard in textile industry. According to the method, macromolecular colloidal pollutants in the biochemical effluent of the printing and dyeing wastewater, which are difficult to degrade, can be removed by utilizing the coagulation/flocculation performance of aluminum salts and iron salts in the composite reagent; and meanwhile, soluble inert pollutants in the wastewater are removed by utilizing the adsorbability of the activated carbon and the mineral material in the composite reagent.

To improve the stability of vaccines comprising aluminum salt(s), the invention uses the amino acid histidine. This can improve pH stability and adjuvant adsorption and can be reduce antigen hydrolysis. Histidine is preferably presen during adsorption to the aluminium salt(s). The antigen in the vaccine may be a protein or a saccharide and is preferably from N. meningitidis.

The invention provides magnesium-aluminum-iron hydrotalcite, a preparation method and application thereof as a coadsorbent. The preparation method comprises the following steps of: adding a mixed salt solution to an alkali solution to carry out a coprecipitation reaction by controlling the pH of the reaction ending point to 8.0-12; and then aging, filtering, washing and drying to obtain the magnesium-aluminum-iron hydrotalcite, wherein the mixed salt solution comprises magnesium salts, aluminum salts and iron salts, and after the magnesium-aluminum-iron hydrotalcite is roasted at 300-800 DEG C for 1-10 hours, an adsorbent for coadsorbing phenol and chromium (VI) in water is obtained. The invention has the advantages of moderate reaction condition, easy raw material obtaining, low production cost and reusability, and the adsorption rates of the phenol and the chromium (VI) can both reach higher 70 percent, thus the magnesium-aluminum-iron hydrotalcite has good application prospect. The chemical structural general formula of the magnesium-aluminum-iron hydrotalcite is as follows: [M2<+1>-xM3+x(OH)2]x+(CO3<2->)x/2.yH2O.

The invention provides a method for preparing sludge-based formed magnetic active carbon. The method comprises the steps as follows: sludge is used as a raw material, an activating agent is added for carbonizing and activating the sludge; nano-sized Fe3O4 is used as a magnetic source for magnetizing the sludge active carbon; and sodium carboxymethylcellulose and aluminum salt are composited to an organic-inorganic binding agent, the binding agent and a p-toluenesulfonhydrazide foaming agent are used for uniformly binding powdery magnetic active carbon into a formed magnetic active carbon precursor with abundant pore structures, and finally, the formed magnetic active carbon precursor is heated to obtain the sludge-based formed magnetic active carbon. According to the method, the sludge is used as a main raw material, the resource utilization of the sludge is achieved, the recycling is convenient, and reutilization can be achieved; and further, the sludge-based formed magnetic active carbon has a stable structure and good magnetic stability, and can be widely used in the fields such as sewage treatment, soil pollution treatment and the like.

Methods for improving surface roughness of an environmental barrier coating including providing a component having a plasma sprayed environmental barrier coating; applying a slurry to the environmental barrier coating of the component, the slurry being a transition layer slurry or an outer layer slurry; drying the environmental barrier coating having the applied slurry; and sintering the component to produce a component having an improved surface roughness where the slurry includes a solvent; a primary transition material, or a primary outer material; and a slurry sintering aid selected from iron oxide, gallium oxide, aluminum oxide, nickel oxide, titanium oxide, boron oxide, alkaline earth oxides, carbonyl iron, iron metal, aluminum metal, boron, nickel metal, iron hydroxide, gallium hydroxide, aluminum hydroxide, nickel hydroxide, titanium hydroxide, alkaline earth hydroxides, iron carbonate, gallium carbonate, aluminum carbonate, nickel carbonate, boron carbonate, alkaline earth carbonates, iron oxalate, gallium oxalate, aluminum oxalate, nickel oxalate, titanium oxalate, solvent soluble iron salts, solvent soluble gallium salts, solvent soluble aluminum salts, solvent soluble nickel salts, solvent titanium salts, solvent soluble boron salts, and solvent soluble alkaline earth salts.

The present invention provides a novel fluorination catalyst that has high stability at high temperatures, is easily regenerated and is superior in catalytic activity and selectivity and a method for the preparation of the fluorination catalyst. The present invention also provides a method for the preparation of a novel fluorinated compound, and particularly, 1,1,1,3,3-pentafluoropropane (HFC-245fa), by using the catalyst. The fluorination catalyst of the present invention is obtained by treating a metal salt containing a chromium salt such as chromium oxide with chlorine gas and/or oxygen gas. Examples of the metal salt may include, besides a chromium salt, one or more catalytically active metal salts selected from magnesium salts, aluminum salts, zinc salts, sodium salts, nickel salts, iron salts, cobalt salts, vanadium salts, manganese salts and copper salts.

The invention relates to a preparation method of aluminum oxide ceramic continuous fiber, which comprises the following steps of: preparing a sol spinnable precursor by use of inorganic aluminum salt, aluminum powder, aluminum isopropoxide, nitric acid and crystal grain inhibitor; spinning gel fiber by a dry spinning technology; and performing drying and high-temperature calcination to obtain the aluminum oxide ceramic continuous fiber with diameter of 10-60 microns. According to the invention, the prepared sol system is particularly stable, the cost of the raw materials is low, and the preparation process is simple; and the filament can be obtained without adding auxiliaries such as macromolecules and the like. The filamentation environment is mild in the dry spinning. The calcined ceramic continuous fiber has flexibility and can be used as reinforcement in a composite material to improve strength and heat resistance of the material.

A method for forming a receiver transport member for an electrostatographic reproduction apparatus. The transport member transports receiver members with respect to a fuser assembly and is frictional coupled to a transfer member for driving the transfer member. The method for forming the transport member provides a substrate bearing a high friction layer that includes inorganic particles, with a compound of aluminum selected from the group consisting of aluminum hydroxide, alumina hydrate, aluminum oxide, pseudo-boehmite, boehmite alumina, aluminum salts, and mixtures thereof, dispersed in an organic binder so that the high friction layer is capable of preventing a loss of frictional coupling due to release oil applied to a receiver member bearing a fused toner image.

An enhanced efficacy aluminum only salt active. The method for making such active comprises the steps of (a) providing an aqueous solution of an aluminum salt having a Band III polymer concentration of at least about 20%; (b) adding to the aqueous solution of step (a) an aqueous solution of a monomeric aluminum salt to form a mixture; and (c) rapidly drying the mixture to form a product powder. The active comprises an aluminum only salt having a Band III polymer concentration of at least about 20%, an aluminum to anion ratio of from about 1.1:1 to about 1.8:1 and a level of monomeric aluminum of from about 2% to about 20% of the total aluminum.

The invention belongs to the field of a secondary battery, and particularly relates to a preparation method of a lithium-nickel-cobalt-aluminum composite metal oxide, which comprises the following steps: using a pollution-free carbonate complexing agent to firstly precipitate nickel and cobalt salts to form a spherical precursor, then precipitating aluminum salts through a secondary precipitation method to obtain a nickel-cobalt-aluminum precipitate, cleaning, drying, mixing with lithium salts, and sintering to obtain the lithium-nickel-cobalt-aluminum composite metal oxide having mixed and doped metal ions and anions. The invention solves the problems that the industrial preparation of the lithium-nickel-cobalt-aluminum composite metal oxide (a lithium ion positive pole material) is difficult in the prior art, ammonia gas is polluted in the preparation process, the obtained material has low tap density and poor cycle performance and the like. Besides, the prepared product has the characteristics of high tap density and high cycle performance.

The invention relates to a high-salt wastewater precipitation desalting recycling process, which is a two-stage process and comprises the following steps: a first stage: removing sulfur by a calcium sulfate method, to be more specific, synchronously removing sulfate radicals and divalent metal salts by adding lime to a calcium sulfate method sulfur removal unit; and a second stage: performing deepsulfur removal and chlorine removal, to be more specific, simultaneously deeply removing the sulfate radicals and chloride ions by adding lime and aluminum salt in a deep sulfur removal and chlorineremoval unit. Compared with the prior art, the multi-stage precipitation desalting process provided by the invention considers the problem of efficient sludge dewatering while treating sewage, improves the removal efficiency and reduces the treatment cost.

The invention relates to a water-based expansive type nano fireproof coating for a cable and a preparation method of the water-based expansive type nano fireproof coating. The water-based expansive type nano fireproof coating for the cable is characterized by comprising the following components in parts by weight: 20-40 parts of a coating base body, 15-45 parts of a nano flame retardant, 2-10 parts of a flame retardant synergist, 5-10 parts of a filler, 1-5 parts of an assistant and 10-30 parts of water, wherein the nano flame retardant is obtained by nano-crystallizing the flame retardant which comprises soluble aluminum salt, a charring catalyst, a charring agent and a foamer, and the flame retardant synergist is biomass ash of a power plant. As the components of the water-based expansive type nano fireproof coating are good in compatibility, the water-based expansive type nano fireproof coating is good in buckling resistance, humidity resistance, oil resistance and water resistance, excellent in flame retardance and low in charring height.

This invention relates to compositions which are capable of sequestering calcium ions and are derived in part from renewable carbohydrate feedstocks. The calcium sequestering compositions are mixtures containing one or more hydroxycarboxylic acid salts and one or more aluminum salts.

The invention discloses fibrous mesoporous alumina and a preparation method thereof. At a medium/low temperature, inorganic aluminum salt is used as aluminum source and ammonium salt is used as precipitant to prepare fibrous mesoporous alumina through the precipitation method, wherein inorganic aluminum salt is aluminum nitrate and ammonium salt is ammonium carbonate; the traditional precipitation method is adopted to drop ammonium carbonate solution in aluminum nitrate solution and obtain precipitate; and the precipitate is aged, washed, filtered and dried to obtain fibrous precursor powder, and the obtained fibrous precursor powder is calcined to obtain fibrous mesoporous alumina. The preparation method has simple technology and safe operations and is suitable for large-scale mass production. By using inorganic aluminum salt as aluminum source and ammonium carbonate as precipitant, the production cost is low. The prepared mesoporous alumina is fibrous, the diameter is 70-500nm and the length is 2-3mu m. The fibrous mesoporous alumina has larger specific surface area and bore diameter which are separately 290-380m<2>/g and 3.8-6.5nm and can be widely used in the fields such as adsorption and catalysis, thus the fibrous mesoporous alumina has important and practical application value.

The invention discloses a preparation method of an alumina support. The method comprises the steps of enabling activated carbon fibers with developed pore structures to adsorb inorganic aluminium salts through dipping and then using the activated carbon fibers as pore-enlarging agents, kneading and forming the activated carbon fibers with an alumina precursor, and then drying and roasting the product, thus obtaining the alumina support. The alumina support prepared by the method is higher in specific surface area, more concentrated in pore size distribution and high in mechanical strength, also contains part of macropores with sizes more than 100nm, is suitable for preparing heavy/residual oil hydrogenation catalysts, and is favorable for removing macromolecular impurities in heavy/residual oil and delaying the increase of diffusion resistance in heavy/residual oil hydrogenation, thus being favorable for maintaining the activities of the hydrogenation catalysts and lengthening the running period.

An ink-jet recording material having on a support at least one ink-receiving layer comprising pigment and binder, which further contains in the uppermost layer of the ink-receiving layers at least one water-soluble acidic or neutral salt selected from the group consisting of aluminum salts, magnesium salts, sodium salts, potassium salts and zinc salts, and thereby acquires suitability for an ink-jet recording process using pigment ink.

The invention discloses a sheet alpha-Al2O3 powder body with a controllable particle diameter size and a preparation method of the sheet alpha-Al2O3 powder body. The preparation method comprises the following steps of: (1) preparing a mixed precursor solution which is obtained by uniformly mixing water-soluble aluminum salt, soluble salt, nanometer aluminum oxide crystal seeds and/or sheet alpha-Al2O3 crystal seeds, wherein the water-soluble aluminum salt contains unstable aluminum oxide; (2) adding an alkaline aqueous solution to the mixed precursor solution obtained in the step (1), and when a hydrolysis reaction is ended, and controlling the final pH to be 5.0-9.0 so as to obtain mixed gel containing hydrolysis products; (3) drying the mixed gel, and then calcining the dried mixed gel so as to obtain a mixture of the sheet alpha-Al2O3 powder body and fused salt; and (4) cleaning the fused salt with ionized water, sucking and filtering the cleaned fused salt, and drying the filtered fused salt so as to obtain the pure sheet alpha-Al2O3 powder body. The particle diameter size of the prepared sheet aluminum oxide powder body is controllable. The sheet aluminum oxide is uniform to disperse and is smooth and level, and twin crystals do not appear.

The invention provides a slagging-free type, low-energy consumption and multilevel differential temperature fluidized roasting system for crystallized aluminum salt and a method thereof. The system comprises a crystallized aluminum salt low-temperature roasting system, an aluminum oxide high-temperature finished product roasting system, a high-temperature aluminum oxide multilevel fluidized cooling and heat recovery system and a chimney. The method comprises the following steps of: reducing the outlet temperature of low-temperature roasting flue gas with large gas production rate by adopting a differential temperature multiple roasting method, so that sensible heat carried by the flue gas is greatly reduced; and carrying out reasonable cascade utilization on energy and converting fuel chemical energy inputted by a process system into effective heat of the system to a greatest extent. The slagging-free type and multilevel differential temperature fluidized roasting system has the remarkable advantages of strong adaptability to the content of attached water of the crystallized aluminum salt, good adjustment and stability, high product purity, low energy consumption, low investment, small floor area and the like.

The invention discloses a Na2Fe2(SO4)3@alumina composite material having a core-shell structure and a preparation method and an application thereof. The material is a composite material having the core-shell structure and prepared by coating the surface of Na2Fe2(SO4)3 particles with alumina. The Na2Fe2(SO4)3 is pyrolytically coated with an organic aluminum salt, the problems that Na2Fe2(SO4)3 is dissolved in water and is difficultly coated by alumina via a traditional hydrolysis method are overcome, the synthesis method is simple, conditions are mild, and the yield is high; the prepared composite material can effectively suppress a 'surface poisoning effect' of the material, and has the advantages of high specific capacity, high work voltage, good cyclic stability and excellent rate performance when applied as a sodium ion battery positive electrode material.

The invention discloses a preparation method for a lithium manganate positive electrode material of a two-dimensional nanocrystalline metal oxide composite coating. The preparation method comprises the specific steps: weighing lanthanum salt and spinel lithium manganate according to ratios; dissolving the lanthanum salt into water and adding the lithium manganate; adding a precipitant and reacting at 150-180 DEG C for 6-24 hours; filtering and drying; sintering a obtained precursor to obtain a lanthanum salt coating lithium manganate material; weighing aluminum salt and adding water to dissolve; then adding the lanthanum salt coating lithium manganate material; adding the precipitant; and filtering, drying and sintering to obtain the lithium manganate positive electrode material. According to the preparation method, a hydrothermal-precipitation method is used for covering the lithium salt and the aluminum salt on the surfaces of lithium manganate grains; after the lithium manganate grains are sintered, the lithium manganate positive electrode material with the lithium manganate grains coated with one layer of a La2O3-Al2O3, Al2O3-LLTO, LLTO-La2O3 or La2O3-Al2O3-LLTO two-dimensional coating material is obtained; the obtained positive electrode material has good first-time discharging efficiency and circulating performance.