Abstract: Diallcoxysilane and monoalkoxysilane functionalized polymers were applied as scale control agents in Bayer process. The polymer inhibitors reduced the quantity of aluminum silicate scale formed in spent liquor while significantly changed the morphology of the scale. Also a method is provided for reducing aluminum silicate scale of Bayer process by adding the dialkoxysilane and monoalkoxysilane functionalized polymer into the Bayer liquor stream.

Abstract: The present invention relates to a process for obtaining nanocrystalline corundum, characterised in that it comprises a first step of thermal treatment of the raw material used in the process at standard pressure, to a temperature greater than that of the last endothermic accident of the differential thermal analysis record of the raw material, performed to 925° C.; and a second step of fast cooling from the maximum temperature reached in the preceding step to room temperature. Moreover, the present invention relates to the nanocrystalline corundum obtainable from the process described, as well as to multiple uses of said corundum. Furthermore, this material may be disaggregated, for example by means of high-energy grinding, to produce a fine aggregate that may be used as an abrasive or as a functional load in plastic polymers or other types of materials.

Abstract: The invention discloses nano/micron binary structured powders for superhydrophobic, self-cleaning applications. The powders are featured by micron-scale diameter and nano-scale surface roughness. In one embodiment, the average diameter is about 1-25 ?m, and the average roughness Ra is about 3-100 nm. The nano/micron binary structured powders may be made of silica, metal oxide, or combinations thereof.

Abstract: A process for producing metal oxide from a metal salt includes supplying a first part of the metal salt to a hydrate drier so as to indirectly heat the first part of the metal salt in the hydrate drier using a heat transfer medium from a first stage of a multi-stage indirect cooler so as to dry the first part of the metal salt in the hydrate drier and so as to control a waste gas temperature of the process. A second part of the metal salt is guided as a partial stream past the hydrate drier. The metal salt is preheated in a first preheating stage and precalcined in a second preheating stage. The metal salt and a fluidizing gas having a temperature of 150° C. or less are supplied to a fluidized bed reactor so as to calcine the metal salt to form a metal oxide product. The metal oxide product is cooled in at least one suspension heat exchanger and then in the multi-stage indirect cooler.

Abstract: Superabsorbents comprising pyrogenic aluminum oxide exhibit a low caking tendency coupled with good absorption properties and rapid water absorption.

Abstract: Methods are described that have the capability of producing submicron/nanoscale particles, in some embodiments dispersible, at high production rates. In some embodiments, the methods result in the production of particles with an average diameter less than about 75 nanometers that are produced at a rate of at least about 35 grams per hour. In other embodiments, the particles are highly uniform. These methods can be used to form particle collections and/or powder coatings. Powder coatings and corresponding methods are described based on the deposition of highly uniform submicron/nanoscale particles.

Abstract: An apparatus and a method for controllably converting aluminum into alane. In the system of the invention, a reaction between aluminum and hydrogen to form alane is performed at temperatures below 100° C. using a supercritical fluid such as CO2 as a reaction medium, with the optional inclusion of a co-solvent, such as an ether, in the reaction vessel. Inert gas is used to exclude unwanted gases such as oxygen. The reaction of aluminum and hydrogen has been observed to proceed at approximately 60° C. using Me2O as an added solvent in CO2 at supercritical pressures.

Abstract: The present invention relates to polycrystalline Al2O3 bodies based on melted aluminum oxide having a mean crystallite size of the primary crystals between 20 ?m and 100 ?m and a closed macroporosity between 10% by volume and 30% by volume. The polycrystalline Al2O3 bodies may be obtained by tapping out and quenching a liquid aluminum oxide melt and simultaneous seeding of the pouring stream with seed crystals and can be used advantageously for the production of abrasive materials and refractory products.

Abstract: This invention relates to crystalline boehmitic aluminas the crystallites of which exhibit unusual dimensional differences in the space directions 020 and 120. This invention further relates to a method for preparing such aluminas and the follow-up products obtained therefrom by calcination.

Abstract: A flame retardant polymer composite is disclosed. The composite includes a polymer base material and a flame retardant filler provided in the polymer base material, the flame retardant filler containing seeded boehmite particulate material having an aspect ratio of not less than 3:1.

Abstract: An object of the present invention is to provide ? alumina for the production of a sapphire single crystal, capable of producing a sapphire single crystal with high production efficiency; and a method for producing the same. Disclosed are ? alumina for the production of a sapphire single crystal, including 100 parts by weight of ? alumina (I) and 25 to 235 parts by weight of ? alumina (II), wherein the ? alumina (I) has a specific surface area of 0.1 to 5 m2/g and a bulk density of 1.5 g/cm3 or more, the ? alumina (II) is composed of sintered particles and also has a specific surface area of 1 m2/g or less and a relative density of 85% or more, and each of the body particles has a volume of 0.01 cm3 or more; and a method for producing the same.

Abstract: A method of preparing a catalyst support is described comprising washing a precipitated metal oxide material with water and/or an aqueous solution of acid and/or base such that contaminant levels in said precipitated metal oxide are reduced. The method may be applied to precipitated alumina materials to reduce contaminants selected from sulphur, chlorine, Group 1A and Group 2A metals. The catalyst supports may be used to prepare catalysts for the Fischer-Tropsch synthesis of hydrocarbons.

Abstract: The present invention relates to a method for preparing high-purity aluminum, the method comprising: a mother liquor preparing step for preparing a mother liquor by dissolving and aging ordinary aluminum hydroxide; a refining step for adding pulp to absorb impurities from the prepared mother liquor after the mother liquor preparing step; and an obtaining step for obtaining high-purity alumina by adding a seed into the mother liquor and precipitating a precipitate, and filtering, washing, and recrystallizing the precipitate, and calcining the precipitate. Thus, the present invention enables an environmentally-friendly and low-cost preparation of high-purity alumina.

Abstract: The invention relates to thermally sprayed Al2O3 layers having a high content of corundum without any property-reducing additives, and to a method for the production of said layers. The invention may be utilized particularly in the field of electrical insulation, as a dielectric, and as protection from wear. According to the invention, the thermally sprayed Al2O3 layers are characterized in that they have a porosity of no more than 19%, and a high content of ?-Al2O3 (content of corundum) of at least 72% by volume. The layers have a specific electrical resistance of >1·1012 Ohms·cm, and a purity of >97%. The production according to the invention of said layers is carried out utilizing aqueous or alcoholic suspensions made from pure ?-Al2O3, having a grain size of >100 nm by means of a method from the group of thermal spraying.

Abstract: A process is described for reducing the total acid number of a refinery feedstock. In one embodiment, refinery feedstock containing naphthenic acids is contacted with an effective amount of solid catalyst in the presence of an aqueous caustic base, wherein the caustic base is sodium hydroxide or potassium hydroxide, for a period of time sufficient to neutralize at least a portion of the naphthenic acids in the feedstock. Thereafter, the aqueous phase is separated from the neutralized refinery feedstock. In another embodiment catalyst is pretreated with a caustic base solution and contacted with refinery feedstock to reducing the total acid number.

Abstract: Herein disclosed is alumina powder incorporated into a composition which should have excellent heat conduction and used as a heat-radiating member and for sealing a semiconductor. The spherical ?-alumina powder has an average sphericity of not less than 0.93 and a content of ?-crystalline form is not less than 95% and the spherical ?-alumina powder is prepared according to the method, which comprises the steps of: (1) softening metallic aluminum powder or alumina powder through the treatment with a flame; (2) solidifying the softened powder by passing the same through a zone maintained at a temperature ranging from 800 to 500° C.; (3) increasing the content of ?-phase by passing the solidified powder through a zone maintained at a temperature ranging from 950 to 1,500° C.; and (4) collecting the resulting powdery product while cooling the same.

Abstract: An apparatus for producing metal oxide nanofibers includes a jetting unit, a mixing unit, a heating unit, and a cooling unit. The jetting unit jets particles made of a metal. The mixing unit prepares a mixture by mixing the metal particles and a gas containing an oxidizing component that includes oxygen in molecules of the component. The heating unit heats the mixture to raise the temperature of the mixture up to a temperature at which the metal evaporates. The cooling unit cools the product thus-produced in the heating unit.

Abstract: Provided is a method for producing a porous material, wherein porosity can be controlled to 50% or higher by means of a freezing method, pore size can be controlled to 10 ?m to 300 ?m, and pore diameter distribution is uniform. The method is a method for producing a porous material, comprising freezing a mixture of water and a raw material comprising at least any of a ceramic material, a resin, a metal, and precursors thereof from a specific portion of the mixture to use ice crystals produced at the time as a pore source and then heat-treating a dry material obtained by removing the ice from the frozen material, wherein the mixture of a raw material and water or the frozen material comprises an antifreeze protein.

Abstract: A friction disc (2) with an anti-abrasion layer (1) and integrated wear indication, the friction disc (2) having a friction surface (2?) which is completely covered by the anti-abrasion layer (1). At least one indication surface element (3) which occupies a part of the friction surface (2?) and differs from at least one of the components friction surface (2?) and anti-abrasion layer (1) of the friction disc (2) in at least one of the features coloring and texture is provided between the anti-abrasion layer (1) and the friction disc (2). Compositions of the anti-abrasion layer (1) of the friction disc (2).

Abstract: CO2 capture from flue gas is a costly procedure, usually due to the energy required for regeneration of the capture medium. One potential medium which could reduce such an energy consumption, however, is Na2CO3. It has been well studied as a sorbent, and it is understood that the theoretical energy penalty of use of Na2CO3 for CO2 separation is low, due to the relatively low heat of reaction and low heat capacity of the material. While it offers some advantages over other methods, its primary downfall is the slow reaction with CO2 during adsorption and the slow Na2CO3 regeneration process. In an effort to reduce the energy penalty of post-combustion CO2 capture, the catalytic decomposition of NaHCO3 is studied. Nanoporous TiO(OH)2 is examined as a potential catalytic support for a cyclic Na2CO3/NaHCO3 based CO2 capture process.

Abstract: Compositions and methods suitable for removing poisonous metals from hydrocarbons are provided. The compositions comprise hydrotalcite having one or more trapping metals dispersed on the outer surface thereof.

Abstract: Compositions for making alpha-alumina supports for, for example, inorganic membranes are described. Methods for controlling the alumina and pore former particle sizes and other process variables are described which facilitate desirable porosity, pore distribution and strength characteristics of the resulting alpha-alumina inorganic membrane supports.

Abstract: The invention relates to alpha-alumina with a purity of greater than or equal to 99.99%, in the form of spherical particles (1) with a size predominantly greater than or equal to 850 ?m. The invention also relates to the use of alpha-alumina as defined above, and to a related process for synthesizing and device.

Abstract: Exemplary embodiments provide materials and methods of forming a metal oxide composite and a porous metal oxide, which can be used for applications including catalysis, sensors, energy storage, solar cells, heavy metal removal and separations, etc. In one embodiment, a one-step solvothermal process can be used to form the metal oxide phase with high crystallinity and high surface area.

Abstract: The present invention includes a method of producing a crystalline metal oxide nanostructure. The method comprises providing a metal salt solution and providing a basic solution; placing a porous membrane between the metal salt solution and the basic solution, wherein metal cations of the metal salt solution and hydroxide ions of the basic solution react, thereby producing a crystalline metal oxide nanostructure.

Abstract: The disclosure provides a method of producing thermally sprayed Al2O3 coatings having a high content of corundum without any property-reducing additives. The coatings may be utilized particularly in the field of electrical insulation, as a dielectric, and as protection from wear. The thermally sprayed Al2O3 coatings have a porosity of no more than 19%, and a high content of ?-Al2O3 (content of corundum) of at least 72% by volume. The coatings have a specific electrical resistance of >1·1012 Ohms·cm, and a purity of >97%. The production of said coatings is carried out utilizing aqueous or alcoholic suspensions made from substantially pure ?-Al2O3, having a grain size of >100 nm by thermal spraying.

Abstract: A unique combination of solution stabilization and delivery technologies with special ALD operation is provided. A wide range of low volatility solid ALD precursors dissolved in solvents are used. Unstable solutes may be stabilized in solution and all of the solutions may be delivered at room temperature. After the solutions are vaporized, the vapor phase precursors and solvents are pulsed into a deposition chamber to assure true ALD film growth.

Abstract: A process for producing metal oxide from metal salts includes cleaning a metal salt in a filter. After cleaning, the metal salt is dried in a drying apparatus. Steam is formed in the drying apparatus. The metal salt is preheated in at least one preheating stage. The metal salt is calcined to metal oxide in a fluidized-bed reactor. The metal oxide is cooled. The steam formed in the drying apparatus is recirculated into the filter.

Abstract: The invention is directed towards methods and compositions for treating slurry to better dewater alumina trihydrate precipitated from the Bayer process. The method comprises using a product comprising the combination of at least two surfactants together with an optional coupling agent to treat the alkaline slurry with certain amount of alumina trihydrate present. Synergistic effects between binary combinations of nonionic and anionic surfactants result in more efficient dewatering aids for alumina trihydrate slurry when combinations of such surfactants are applied. A coupling agent may be used in formulations to reduce viscosity of such surfactant combinations, allowing the practical application of such products.

Abstract: The invention provides methods and compositions for improving the production of alumina hydrate. The invention involves adding one or more polysaccharides to liquor or slurry in the fluid circuit of the production process. The one or more polysaccharides can be a cross-linked polysaccharide (such as cross-linked dextran or cross-linked dihydroxypropyl cellulose). The various polysaccharides can impart a number of advantages including at least some of: greater flocculation effectiveness, increasing the maximum effective dosage, faster settling rate. The production process can be a Bayer process.

Abstract: A refractory object can include a beta alumina. In an embodiment, the refractory object is capable of being used in a glass fusion process. In another embodiment, the refractory object can have a total Al2O3 content of at least 10% by weight. Additionally, a Mg—Al oxide may not form along a surface of the refractory object when the surface is exposed to a molten glass including an Al—Si—Mg oxide. In a particular embodiment, a refractory object can be in the form of a glass overflow forming block used to form a glass object that includes an Al—Si—Mg oxide. When forming the glass object, the glass material contacts the beta alumina, and during the flowing of the glass material, a Mg—Al oxide does not form along the beta alumina at the surface.

Abstract: Catalyst for preparing ethylene oxide, at least comprising silver applied to a support, the support having a BET constant C in the range from 0 to 800, determined in accordance with DIN ISO 9277.

Abstract: A process for producing a lithium-containing composite oxide for a positive electrode active material for use in a lithium secondary battery, the oxide having the formula LipQqNxMyOzFa (wherein Q is at least one element selected from the group consisting of titanium, zirconium, niobium and tantalum, N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than Q and N, 0.9?p?1.1, 0?q<0.03, 0.97?x?1.00, 0?y<0.03, 1.9?z?2.1, q+x+y=1 and 0?a?0.02), which comprises firing a mixture of a lithium, Q element source and N element sources, and an M element source and/or fluorine source when these elements are present, in an oxygen-containing atmosphere, wherein the Q element source is a Q element compound aqueous solution having a pH of from 0.5 to 11.

Abstract: Dialkoxysilane and Monoalkoxysilane functionalized polymers were applied as scale control agents in Bayer process. The polymer inhibitors reduced the quantity of aluminum silicate scale formed in spent liquor while significantly changed the morphology of the scale. Also a method is provided for reducing aluminum silicate scale of Bayer process by adding the dialkoxysilane and monoalkoxysilane functionalized polymer into the Bayer liquor stream.

Abstract: A method of forming a metal oxide nanostructure comprises disposing a chelated oligomeric metal oxide precursor on a solvent-soluble template to form a first structure comprising a deformable chelated oligomeric metal oxide precursor layer; setting the deformable chelated oligomeric metal oxide precursor layer to form a second structure comprising a set metal oxide precursor layer; dissolving the solvent-soluble template with a solvent to form a third structure comprising the set metal oxide precursor layer; and thermally treating the third structure to form the metal oxide nanostructure.

Abstract: An object of the present invention is to provide a metal salt-containing composition which is applicable to many metal source materials, and can be used for forming a compact and uniform metal oxide film comparable to those formed according to a sputtering method, as well as to provide a substrate having a metal complex film on the surface thereof obtained using the metal salt-containing composition, and a substrate having a metal complex film on the surface thereof obtained by further heating the substrate. Moreover, another object of the present invention is to provide a method for manufacturing a substrate having such a metal complex film on the surface thereof. According to the present invention, a metal salt-containing composition containing a metal salt, a polyvalent carboxylic acid having a cis-form structure, and a solvent, in which: the molar ratio of the polyvalent carboxylic acid to the metal salt is not less than 0.5 and not more than 4.

Abstract: The invention provides methods and compositions for improving the production of alumina. The invention involves adding a product containing one or more polysaccharides to liquor within the fluid circuit of the production process, where one of the polysaccharides is scieroglucan. The use of scleroglucan can impart a number of advantages including at least some of: greater flocculation effectiveness, increasing the maximum effective dosage, faster settling rate. The production process can be a Bayer process.

Abstract: An aluminum oxide dispersion comprising from 30 to 99.9% (w/w) of a solvent; and from 0.1 to 70% (w/w) of aluminum oxide nanofibers suspended in the solvent, wherein the nanofibers comprise from 0 to 99.99% (w/w) of ?-AlO(OH) and from 0.01 to 100% (w/w) of ?-Al2O3; and a method of preparing the aluminum oxide dispersion.

Abstract: Materials and associated processes for making the materials. For example the material may include alpha alumina crystalline whiskers. The process may include conducting the process as hydrothermal, and producing the whiskers to have a length to diameter aspect ratio of at least two.

Abstract: A method for producing boehmite particles includes subjecting powder of aluminum hydroxide to hydrothermal reaction together with a nucleation agent, thereby obtaining boehmite particles having an average primary particle size of 0.6 ?m or less and including primary particles each having a hexahedral shape. A method for producing alumina particles includes: drying the boehmite particles produced by the above described method; calcining the boehmite particles, which have been dried, to obtain alumina particles; and disintegrating the obtained alumina particles.

Abstract: A method and composition for flocculation and separation of suspended solids from an industrial process stream containing suspended solids is provided. The method includes the steps of adding to the stream a water-in-oil-in-water emulsion polymer in an amount effective to flocculate the suspended solids and separating the flocculated solids therefrom. The composition is a water-in-oil-in-water emulsion of a water-soluble polymer in which the continuous phase is an aqueous solution of a water-soluble salt.

Abstract: Methods of making unique water treatment compositions are provided. In one embodiment, a method of making a doped metal oxide or hydroxide for treating water comprises: disposing a metal precursor solution and a dopant precursor solution in a reaction vessel comprising water to form a slurry; and precipitating the doped metal oxide or hydroxide from the slurry.

Abstract: Sintered, substantially round and spherical particles prepared from a slurry of a calcined, uncalcined or partially calcined raw material having an alumina content of more than 55% by weight, and a mullite growth promoter in an amount of from about 2 to about 10% dry weight of the total solids in the slurry. The sintered particles are suitable for use as a propping agent or as a foundry media.

Abstract: A crystallized solid, referred to by the name IM-14, which has an X-ray diffraction diagram as provided below, is described. Said solid has a chemical composition that is expressed according to the formula GeO2:nY2O3:pR:qF:wH2O, where R represents one or more organic radical(s), Y represents at least one trivalent element, and F is fluorine.

Abstract: A method for producing an ? alumina sintered body for the production of a sapphire single crystal characterized in that a relative density is 60% or more, a closed porosity is 10% or less, a purity is 99.99% by mass or more, each content of Si, Na, Ca, Fe, Cu and Mg is 10 ppm or less, and a volume is 1 cm3 or more, and the ? alumina sintered body can be obtained by mixing 100 parts by weight of an ? alumina with 1 part by weight or more and 20 parts by weight or less of an ? alumina precursor to obtain a mixture, forming a compact from the obtained mixture, and firing the obtained compact.

Abstract: A coating for spark plugs and engine parts is resistant to fouling. The coating may be applied to the spark plug or engine part by dipping the part in a sol gel solution, ensuring it wets the part, and extracting it at a slow, controlled rate. As the part is allowed to dry, the sol gel reacts with moisture in the air to form a thin oxide film. Unlike conventional sol gel applications, which apply the oxide directly to the part, the present invention may form an oxide coating, in situ, while drying in place on the part.

Abstract: Disclosed is a reactor, a retained catalyst structure, and a method for increasing the rate of decomposition of polysulfides and removal of hydrogen sulfide in liquid sulfur. The reactor, the retained catalyst structure, and the method include a retained catalyst structure arranged and disposed for contacting a first stream and a second stream in a reactor including a catalyst. The catalyst increases the rate of decomposition of polysulfides and facilitates the removal of hydrogen sulfide in the liquid sulfur of the first stream with the second stream. The first stream includes liquid sulfur containing polysulfides and dissolved hydrogen sulfide. The second stream includes an inert gas or a low oxygen-containing gas.

Abstract: Aluminum oxide powder in the form of aggregates of primary-particles, which has a BET surface area of from 10 to 90 m2/g and comprises as crystalline phases, in addition to gamma-aluminum oxide and/or theta-aluminum oxide, at least 30% of delta-aluminum oxide. It is prepared by vaporizing aluminum chloride and burning the vapor together with hydrogen and air, the ratio of primary air/secondary air being 0.01 to 2, the exit speed vB of the reaction mixture from the burner being at least 10 m/s, the lambda value being 1 to 4, the gamma value being 1 to 3 and the value of gamma*vB/lambda being greater than or equal to 55. Dispersion comprising the aluminum oxide powder. Coating composition comprising the dispersion.

Abstract: A filter for treating CO2 from a CO2-emitting industrial plant, takes advantage of the fact that peridotite igneous rocks (or material of similar chemical content: basalt, gabbro, dunite, amphibolites, artificially produced Ca, Mg oxides) which are abundant on and close to the Earth's surface, can absorb and contain CO2 gases resultant from industrial activity. This chemical process occurs naturally, but has not been utilized to capture high concentrations of CO2 emitted into the atmosphere. Calcium and magnesium oxides of the peridotite react with CO2 to form stable carbonate minerals. The invention enhances and expedites this natural process for the remediation of industrial pollutants such as CO2 from the oil, gas, coal, cement/concrete and like CO2-emitting industries, and provides a resource for materials in construction (concrete), steel, aviation and agricultural and other industries.

Abstract: An alumina particle (1) of the present invention has an alumina body with a short axis length (b) of 1 to 10 nm, a long axis length (a) of 20 to 400 nm and an aspect ratio (a/b) of 5 to 80. The alumina body is expressed by a Formula I, and n is not less than 0. Al2O3.