19 results about "Aluminum Complex" patented technology

Provided is a resin composition which contributes to the low dielectric loss tangent of a cured product, in particular, a resin composition which contributes to the achievement of a cured product exhibiting a lower dielectric loss tangent even in a high-temperature (100 DEG C) environment. The resin composition contains (A) a cyclic ether compound having a four-membered ring or less, (B) a curing agent, (C) an inorganic filler, and (1D) an aluminum complex, and the component (A) contains (A1) a cyclic ether compound having a cationically polymerizable four-membered ring or less.

The invention discloses a beta-ketimine type binuclear aluminum complex and a preparation method thereof. The binuclear aluminum complex can be used for catalyzing ring opening polymerization of caprolactone, lactide, glycolide, valerolactone, butyrolactone or ethylene carbonate. The invention further discloses a preparation method and application of the binuclear aluminum complex. The preparation method is simple, the reaction condition is mild, the prepared beta-ketimine type binuclear aluminum complex is used as a catalyst, the catalytic activity is high, the stability is good, the service life is long, the molecular weight distribution of the obtained polymerization product is narrow, and the beta-ketimine type binuclear aluminum complex can be well applied to the ring-opening polymerization reaction of cyclic ester.

Described is a moisture-curable silicone composition comprising at least one crosslinkable polydiorganosiloxane having alkoxysilane end groups, at least one condensation catalyst, at least one crosslinking agent having alkoxysilane groups, and optionally further ingredients; characterised in that the condensation catalyst is the reaction product obtained from the reaction of 1 equivalent of a metal complex with 0.1 to 1 equivalent of a preferably partially esterified phosphoric acid or organic phosphonic acid, where the metal complex MC is a titanium (IV), zirconium (IV) or aluminum (III) complex, preferably a titanium (IV) complex, having at least one alkoxy ligand and at least one organic chelate ligand. The compositions are particularly suitable as low modulus adhesives or sealants and have excellent mechanical properties such as tensile strength and tear propagation resistance as well as excellent storage stability, especially in the form of RTV-1 formulations.

The invention provides an anti-interference coagulant which comprises nano C-A-H seed crystal, lithium-aluminum layered double hydroxide, calcium aluminate powder, zwitterionic slow-release alkali, cyclic borate, hydroxyl carboxylic acid aluminum complex, redispersible latex powder and superfine quartz powder, and through a synergistic mechanism of seed crystal induction, buffer complexation, lithium slow release and carrier dispersion, the anti-interference coagulant is prepared. Under the low doping amount of 0.05-0.3 wt%, rapid condensation and early-stage high strength under the complex conditions of 5-35 DEG C, high humidity, high alkali, high sulfate radical and the like are achieved, and the high-temperature performance of the refractory material is not affected. The invention also provides a preparation method of the coagulant and an application of the coagulant in a calcium aluminate cement combined refractory material.

The present application relates to the technical field of refractory materials, in particular to a preparation method of high anti-permeability phosphate bonded silicon carbide refractory brick. The raw materials of the preparation method include high bauxite clinker, silicon carbide aggregate, zirconia micropowder, graphene, aluminum dihydrogen phosphate solution, magnesium-aluminum complex powder, clay and silicon dioxide micropowder. The preparation steps are as follows: after the silicon carbide aggregate is dried after removing iron by hydrochloric acid, the aggregate is co-milled with the pre-dried high bauxite clinker, zirconia micropowder and graphene to obtain powder A; after the aggregate is wet-milled with part of the aluminum dihydrogen phosphate solution and water, powder A, clay and silicon dioxide micropowder are added for further mixing and milling, and the remaining aluminum dihydrogen phosphate and magnesium-aluminum complex are added to obtain plastic mud; the mud is formed by high-pressure molding, dried in two stages, and fired at gradient temperature in a weak reducing atmosphere. The method significantly improves the anti-permeability of the refractory brick, and realizes the microporization of the pores of the refractory brick and the high anti-permeability effect through the synergistic effect of composite bonding phase, gradient firing and physical barrier.

The present invention provides a grease composition made from a base oil and an aluminum complex soap thickener, and the grease composition contains an effective amount of a polyalkylene polyamine dispersant to improve shear stability. The grease of the present invention has a penetration unit variation of less than 30 as measured using ASTM D217 after operating 100,000 two strokes.

This invention relates to the field of ceramic material preparation technology and discloses a method for preparing silicon-based ceramic materials, comprising: dispersing ceramic fibers and inorganic fillers to prepare a primary slurry; adding a silane coupling agent to form a silanol modification layer on the fiber surface; adding an aluminum-based inorganic flocculant to generate a polynuclear aluminum hydroxyl complex and adsorbing it onto the modification layer to obtain a composite slurry; filtration and dehydration to obtain a wet blank; inducing dehydration condensation of silanol and polynuclear aluminum hydroxyl complex in a thermal field of 90°C to 150°C, generating covalent silicon-oxygen-aluminum bonds in situ at fiber cross-nodes to construct a three-dimensional cross-linked framework; and impregnating and drying with silica sol under reduced pressure. This invention utilizes interfacial chemical bonding to replace organic adhesives, eliminating the smoking and blackening phenomena of materials under high-temperature environments, and enhancing the integrity and flexural strength of the framework structure through the microscopic condensation of polynuclear components.

The invention provides an aluminum complex with a Salan ligand, which has the following general formula: R is one of alkyl, alkoxy or-OCH2Ph, and Ph is phenyl; r1 and R2 are both hydrogen, C1-C20 straight-chain, branched-chain or cyclic alkyl, C7-C30 mono-or multi-aryl substituted alkyl, C6-C18 aryl or halogen; R1 and R2 are both hydrogen, C1-C20 straight-chain, branched-chain or cyclic alkyl, C7-C30 mono-or multi-aryl substituted alkyl, C6-C18 aryl or halogen; r < 3 >, R < 4 >, R < 5 > and R < 6 > are hydrogen, aliphatic groups in C < 1 >-C < 40 >, aromatic groups in C < 6 >-C < 60 >, alkoxy groups, acyl groups or halogen; m is aluminum metal. The invention provides a novel Salan ligand, the ligand structure has many modification sites and is easy to modify, the catalytic activity and stereoselectivity of the catalyst can be adjusted by changing substituent groups on the benzene ring structure of the ligand, and rac-LA isotactic stereoblock polymerization is changed into heterotactic polymerization.

The invention relates to the technical field of building materials, in particular to a multifunctional magnesium oxysulfate cement floor with excellent water resistance and cracking resistance. Modifiers such as organic acid and alum are directly added into a magnesium oxysulfate cement formula, and the effect of improving the water resistance and cracking resistance of the obtained magnesium oxysulfate cement board is not obvious enough. In order to solve the problems, the invention provides the multifunctional magnesium oxysulfate cement floor with excellent water resistance and cracking resistance, and the multifunctional magnesium oxysulfate cement floor is formed by compounding a base cement board and a surface functional coating of the base cement board. The base cement board takes light burning powder and magnesium sulfate as main raw materials, and an organic acid aluminum complex solution, PVB and an inorganic reinforcing filler are added. And the functional coating adopts a multifunctional epoxy resin-based curing water-based coating with wear-resistant, anti-slip and antistatic properties. According to the cement board, the crystal structure can be effectively optimized and pores can be filled through the slow release effect of the aluminum malate complex in cement hydration, and the water resistance, the cracking resistance and the toughness are remarkably improved in combination with the toughening effect of PVB.

A method of generating hydrogen comprising contacting an aqueous solution with an active aluminum complex comprising aluminum, AIN, gamma-Al2O3, and optionally a carbonaceous material. The active aluminum complex can be safely stored and can be used for safe on-demand generation of hydrogen in water.

The application discloses a method for improving lithium recovery rate in aluminum electrolysis lithium-containing waste residue, and belongs to the technical field of solid waste resource recovery. Part of waste electrolyte, anode carbon residue and overhaul residue generated in aluminum electrolysis contain fluorine aluminum compounds and a small amount of lithium elements. After acid liquid leaching, lithium and part of fluorine aluminum components are transferred into liquid phase to form lithium-containing liquid with recovery value. The acid leaching liquid needs to be purified by adding alkali before lithium precipitation. Fluorine aluminum complex ions are easy to hydrolyze and generate hydroxyl aluminum fluoride colloid precipitate with fine particle size and negative surface during the process. The precipitate is easy to adsorb Li⁺, leading to loss of lithium with filter residue. In view of the above problems, a cationic interfacial modifier is introduced in the process of adding alkali. The cationic group in the cationic interfacial modifier is preferentially adsorbed on the negative potential points on the surface of the colloid particles, weakening the adsorption of the colloid particles on Li⁺. The cationic interfacial modifier promotes flocculation and aggregation of the colloid particles, particle size growth, reduction of filter residue entraining lithium-containing mother liquor, improvement of lithium retention rate in the purified liquid, and preparation of lithium salt products.

The invention relates to a grease containing a) from 50 wt% to 95.8 wt%, based on the total weight of the grease, of at least one base oil, b) from 4 wt% to 20 wt%, based on the total weight of the grease, of at least one thickener selected from the group consisting of urea thickeners, metal complex soaps, in particular lithium complex soaps, aluminum complex soaps, calcium complex soaps, the invention relates to a lubricating grease comprising a) a metal single soap, in particular a lithium single soap, of elements of the first main group of the periodic table, and mixtures thereof, c) from 0.2 wt% to 40 wt%, based on the total weight of the lubricating grease, of at least one semi-crystalline poly-alpha-olefin having at least one melting peak, measured according to DIN EN ISO 11357-3: 2018, higher than 10 DEG C and a crystallinity of from 15% to 45%, and c) from 0.2 wt% to 40 wt%, based on the total weight of the lubricating grease, of at least one semi-crystalline poly-alpha-olefin having at least one melting peak, measured according to DIN EN ISO 11357-3: 2018. Wherein the crystallinity of the semi-crystalline poly-alpha-olefin is calculated by determining the melting enthalpy of the semi-crystalline poly-alpha-olefin according to DIN EN ISO 11357-3: 2018 and dividing the melting enthalpy by 2.93 J / g.

The application discloses a method for preparing hard carbon negative materials by biomass modification, and relates to the field of sodium ion battery negative materials.The amino urea and aluminum complex introduced by biomass modification change the chemical properties of the surface of the hard carbon, provide more active sites for sodium ions, thereby accelerating the diffusion rate of the sodium ions and improving the battery capacity.The introduction of the aluminum complex helps to stabilize the surface structure of the hard carbon and reduce the structural damage in the charging and discharging process, thereby improving the initial coulombic efficiency of the battery.

The invention relates to the technical field of electrolytic aluminum solid waste resource utilization, in particular to a method for preparing aluminum fluoride from electrolyte lithium extraction tailings. The invention provides a method for synergistically recovering aluminum and fluorine resources in tailings generated after lithium extraction of an electrolytic aluminum lithium-rich electrolyte. The method comprises the following steps: firstly, leaching the lithium extraction tailings by adopting a hydrochloric acid-aluminum chloride system, so that aluminum and fluorine enter a solution in the form of a fluorine-aluminum complex to obtain a fluorine-aluminum solution; secondly, impurity removal treatment is conducted on the fluorine-aluminum solution, impurities such as silicon, iron, phosphorus and calcium are removed by regulating and controlling the pH value and adding a precipitator, and a purified solution is obtained; finally, hydrofluoric acid is supplemented into the purified liquid, and the anhydrous aluminum fluoride product with the high additional value is prepared through concentration, crystallization and calcination. The method is reasonable in process, efficient resource utilization of complex fluorine-containing and aluminum-containing solid waste is achieved, the aluminum and fluorine recovery rate is high, the product purity is high, and a new technical approach is provided for solving the electrolytic aluminum solid waste treatment problem and constructing a circular economy industrial chain.

The present invention relates to a heterogeneous catalyst comprising carrier particles having a carrier surface, wherein metal complexes such as salen aluminum complexes and halogen salts are individually immobilized on the carrier surface, and amines may also be immobilized on the carrier surface. The present invention also relates to a method for preparing a cyclic carbonate by reacting an epoxide compound with carbon dioxide in the presence of a heterogeneous catalyst and a halogen compound.

The present disclosure relates to aluminoxane compositions that are substantially or completely free of non-coordinating hydrocarbyl aluminum content, methods of forming such aluminoxane compositions, catalyst systems having the aluminoxane compositions, and methods of polymerizing olefins using the catalyst systems having the aluminoxane compositions. In some embodiments, the catalyst system includes at least one pre-catalyst compound. The catalyst system includes an unsupported or supported aluminoxane. The aluminoxane includes a monodentate siloxy ligand. In some embodiments, a method of making an aluminoxane includes forming an ionic alkylaluminoxane by reacting a supported or unsupported alkylaluminoxane with a polydentate chelating agent to form a silane alkylaluminoxane complex. The method includes heating or aging a silane alkyl aluminum complex to form a supported or unsupported alkyl aluminoxane comprising a monodentate ligand.

TITLE: Cosmetic Composition for the TREATMENT OF HUMAN PERSPIRATION with IMPROVED Environmental Impact and Performance. The present invention relates to a cosmetic composition useful for the treatment of human perspiration and, optionally, body odor resulting from perspiration, notably with a reduced environmental impact. Said antiperspirant composition comprises, in a cosmetically acceptable aqueous medium, at least one antiperspirant active ingredient selected from aluminum salts and complexes; at least one emulsifier selected from polyethylene glycol ethers; cetearyl alcohol; isoamyl laurate; and cetearyl alcohol; the ratio of the weight percentages of isoamyl laurate to cetearyl alcohol being less than or equal to 1. The invention also relates to an associated cosmetic device and method. Figure for abstract: none

The invention relates to the technical field of environmental functional materials and agricultural soil improvement, and discloses a selenium slow-release soil conditioner of a core-shell structure and a preparation method and application thereof.The conditioner is characterized in that an inner core is composed of biochar subjected to iron-aluminum composite modification, and the biochar is prepared through pyrolysis of carbon-containing agricultural and forestry waste; the shell is a biodegradable polymer coating layer coating the surface of the inner core; wherein the average particle size of the particles is 0.5 to 2.0 mm. The preparation method comprises the following steps: pyrolyzing pretreated carbon-containing agricultural and forestry wastes to prepare biochar, performing iron-aluminum co-precipitation modification, adsorbing a selenium source solution to form a selenium-loaded core, and performing granulation and chitosan fluidization spraying coating to prepare the selenium slow-release soil conditioner with the core-shell structure. The problem that the passivation efficiency of heavy metal cadmium is insufficient can be solved, and synchronous selenium increasing and cadmium reducing are achieved.

This disclosure provides a resin composition capable of improving the flowability of a resin composition and enhancing the crack resistance of the cured product. The resin composition contains a liquid epoxy compound (A), a liquid aromatic amine compound (B), an inorganic filler (C), and an aluminum complex having nitrogen and oxygen atoms (d1). The viscosity of the resin composition at 25°C is less than 400 Pa·s.