82 results about "Inorganic Syntheses" patented technology

A binary composite zeolite with a core-shell structure and a preparation method thereof, which belong to the field of inorganic synthesis and catalyst preparation, specifically relate to a binary composite zeolite with a Beta core and a mordenite shell structure and a preparation method thereof. The material will contain two phases of Beta zeolite and mordenite at the same time, and the ratio of the two phases and the surface L/B acid can be adjusted. Directly add aluminum, organic template agent tetraethylammonium bromide and alkali, and use Beta zeolite as the silicon source for mordenite synthesis to prepare a binary composite zeolite material with a double microporous core-shell structure, which is transformed by amine exchange After forming hydrogen form, it is used as a catalyst for the conversion of methanol to prepare dimethyl ether. At a weight space velocity of 2.26 (g/g) h-1, a partial pressure of methanol of 11.4Kpa and a reaction temperature of 300°C, after 72 hours of reaction, methanol The conversion rate still remains above 80%, and the selectivity of dimethyl ether is above 99%.

The invention provides a synthesis method of tungsten trioxide, belongs to the technical field of inorganic synthesis chemistry, and particularly relates to the synthesis method of the tungsten trioxide. The synthesis method comprises the following steps of: taking sodium tungstate dihydrate and sodium chloride as raw materials; utilizing hydrochloric acid to adjust a pH (Potential of Hydrogen) value of a reaction system to adjust the pH value to 1.5-3.0; carrying out hydrothermal reaction at 170-190 DEG C for 22-28 hours; and washing, centrifuging and drying to obtain tungsten trioxide powder. The obtained tungsten trioxide powder has different shapes and different photoelectric properties. According to the synthesis method disclosed by the invention, a one-step hydrothermal synthesis method is adopted, so that the operation is simple, the repetitiveness is good and the raw material cost is low; and the pH value is simply adjusted to obtain the tungsten trioxide powder with the different shapes and the different photoelectric properties, and the photocatalytic degradation efficiency on an organic dye is higher.

The invention belongs to the crossing field of inorganic synthesis chemistry and material chemistry and relates to a method for synthesizing a thin layer ZSM-5 zeolite with a boron-containing framework. The method includes that a silicon source, a boron source, an aluminum source and a biquaternary ammonium salt template agent are mixed with deionized water to synthesize the thin layer ZSM-5 zeolite with a framework simultaneously containing boron and aluminum in one step through a hydrothermal process. The synthesized zeolite has the advantages that the thin layer sheet shaped appearance is achieved, the degree of crystallinity is high, the synthesized zeolite is in a typical MFI structure, a large outer surface area is achieved, a surface acidity site is fully exposed, and acid strength and strong acid site proportion on the surface of the zeolite can be effectively controlled by adjusting a ratio of boron and aluminum in a fed material. The thin layer ZSM-5 zeolite with the boron-containing framework has an excellent application potential in an acid catalyzed reaction and particularly in a macromolecule splitting and polysaccharide hydrolysis reaction.

The present invention belongs to the field of micron/nanometer material preparing technology and hydrothermal synthesis technology, and is especially low temperature process of preparing RE borate crystal with oxide as precursor. In the hydrothermal system, insoluble RE oxide and hydrated boron trioxide or boron trioxide as the boron source and precursor are reacted at 190-280 deg.c for 12-48 hr, and through further washing, the required RE borate crystal is obtained. The present invention provides one inorganic synthesis way, and the production process has no any pollution. The present invention has simple technological process, easy-to-constitute reaction system, high product purity and other advantages, and is suitable for industrial production.

The invention belongs to the technical field of polymer chemistry and inorganic synthesis, and relates to a preparation method of a thermo-sensitive drug sustained and controlled release mesoporous composite. Mesoporous SiO2 microspheres are taken as carriers, and in-situ polymerization is adopted for preparing the mesoporous composite with thermosensitivity. The method includes adding an amides polymerization monomer, a crosslinking agent and an initiating agent into an acetone solvent until being completely dissolved, then adding the mesoporous SiO2 microsphere activated in advance into the mixture, heating in the atmosphere of nitrogen at the temperature of 60 DEG C for 12 hours prior to cooling to the room temperature, and performing suction filtration, washing and vacuum drying to obtain the thermo-sensitive mesoporous composite; adding the thermo-sensitive mesoporous composite into an organic solvent containing a drug, regulating the concentration of the drug, stirring at the temperature of 45 DEG C for 48 hours prior to filtering and washing to obtain a solid, and dying the solid in vacuum at the temperature of 40-60 DEG C. The method has the advantages of simple process, convenience in operation and the like, and the obtained thermo-sensitive drug sustained and controlled release mesoporous composite has the advantages of stable structure, high drug loading capacity, good thermosensitivity, stable drug release rate and the like and can be applied to the field of drug controlled release.

The invention provides an inorganic synthesis method for regulating the morphology of a ZSM-5 molecular sieve. The method at least comprises the following steps: (1) adding a silicon source, an alkali source and an aluminum source into pure water respectively, and stirring uniformly to obtain silica-alumina gel; (2) adding a molecular sieve morphology regulation inorganic additive and a zeolite seed crystal into the silica-alumina gel, and stirring uniformly to obtain a gel mixture; and (3) transferring the gel mixture into a sealed reaction kettle for crystallization, and then separating and drying the crystallized product to obtain a ZSM-5 molecular sieve, wherein the morphology of the ZSM-5 molecular sieve is suitable to be controlled by regulating the addition amount of the molecular sieve morphology regulation inorganic additive. Through the method provided by the invention, a low-silicon ZSM-5 molecular sieve with a regulatable morphology and a silica-alumina ratio controllable in a certain range can be obtained, and the low-silicon ZSM-5 molecular sieve has relatively high crystallinity and purity and good aromatization reaction performance; and moreover, a roasting step is saved in the production process, and environmental pollution is reduced.

The invention relates to a method for synthesizing nanometer ZSM-5 molecular sieves with sheet-like interlaced self-supporting structures, and belongs to the technical field of inorganic synthesis and catalyst preparation. In this method, silica sol and sodium metaaluminate are used as silicon source and aluminum source, and one or two or more organic substances in piperazine, morpholine, triethylenediamine, and piperidine are added in the synthesis, and the raw materials are mixed in 20-50 °C for gelation for 0.5-10 hours, and then transferred to a high-pressure reactor for crystallization at 120-180 °C, and the obtained ZSM-5 molecular sieve has a sheet-like interlaced self-supporting structure after roasting.

The invention discloses a Ta/W mixed heteropoly acid, a preparation method and application thereof in acid catalysis and proton conduction, belonging to the technical field of inorganic synthesis and acid catalysis. The invention has the essential technical scheme that the molecular formula of the Ta/W mixed heteropoly acid is H2O[P8W60Ta12(H2O)4(OH)8O236].125H2O, the Ta/W mixed heteropoly acid is composed of 1 tetramer Ta/W mixed heteropoly anion, 20 protons and 125 crystalline water molecules, and measured with dicinnamalacetone as an indicator in acetonitrile, the Hammett acid strength of the Ta/W mixed heteropoly acid is -2.91. The invention also discloses a preparation method of the Ta/W mixed heteropoly acid and application thereof in acid catalysis and proton conduction. The prepared Ta/W mixed heteropoly acid has the strongest acidity among the currently known heteropoly acids, and the strong acid property causes the Ta/W mixed heteropoly acid to have higher acid catalysis activity; and a large number of hydrogen bonds exist in the solid state structure of the prepared Ta/W mixed heteropoly acid and further form a hydrogen bond network, therefore the mixed heteropoly acid has stronger proton conducting power.

The invention relates to an energy-saving integrated board with an inorganic synthesis finish and a processing technology thereof, and belongs to the technical field of building board structures. The processing technology includes the steps that step1, a polyurethane board is cut according to the size of a finish coat; step2, polyurethane adhesive and polyaryl polymethylene isocyanate are mixed according to the mass ratio of 1:1-2, the temperature of a mixed material is controlled within 15 DEG C-50 DEG C, and then the mixed material is evenly poured between the polyurethane board and the finish coat; step3, a board obtained through the step2 is placed into a press machine, and pressure of 0.02 MPa-0.1 MPa is exerted on the board through the press machine so that the polyurethane board and the finish coat can be combined integrally; step4, after compositing is performed in the press machine for 1-1.5 hours, the obtained composite integrated board with the inorganic synthesis finish can be taken out. The energy-saving integrated board is excellent in thermal insulation and waterproof performance and convenient and rapid to construct, and the finish coat is not prone to cracking and falling.

The invention discloses a method for preparing differently morphological hydroxyapatite by using waste shells and belongs to the field of inorganic synthesis. The differently morphological hydroxyapatite is prepared under a constant-temperature water bath condition by using waste shells as a calcium source, using ammonium phosphate as a phosphorus source and regulating a pH value through ammonia water; in a process, the waste shells are used as raw materials, no morphology regulating agent or other surfactant is added, and the pH value is regulated in a constant-temperature water bath reaction process to achieve the purpose of preparing the differently morphological hydroxyapatite. The method for preparing the differently morphological hydroxyapatite by using the waste shells has the features of mild reaction conditions, high product purity, no impurities and stable quality, the production cost is low, no waste is discharged, the process flow is short, the synthesis time is short, the differently morphological hydroxyapatite with a higher utilization value is produced, and a new direction is opened for industrial production of morphologically controllable hydroxyapatite.

The invention relates to an in-situ Raman cell. A cell body is made of stainless steel and lined with polyfluortetraethylene inside; a thermocouple is arranged in a stainless steel kettle body; a heating pipe is helically coiled outside the kettle body; top threads and a quartz lens fixed by an O-shaped ring are arranged at the top part of a sample cell; a flange disk type design is adopted between a top cover of an in-situ cell and the cell body; and because the quartz lens is adopted as a window to increase a collection solid angle, the invention improves the collection efficiency of Raman diffused light, and can be applied to inorganic synthesis and chemical reaction in a monitoring high-temperature and high-pressure hydrothermal system.

The invention relates to a preparation method and application for a composite film of copper, zinc, tin, sulphur and three-dimensional graphene. The preparation method is characterized by adapting the hydrothermal technology in inorganic synthesis to grow copper, zinc, tin and sulphur nanometer materials on the surface of a three-dimensional porous graphene film and in the porous space thereof and then preparing the composite film of copper, zinc, tin and sulphur nano-particles and three-dimensional graphene. According to the measurement experiment of morphology and electrochemistry, the composite film of copper, zinc, tin, sulphur and three-dimensional graphene has high specific surface area, high conductivity and high catalytic characteristic, and can be used as the photo anode materials of dye-sensitized solar cells.

The invention provides a method for preparing graphene/copper compound powder, belongs to the technical field of inorganic synthesis and powder metallurgy and solves the technical problems of poor coating uniformity of graphene on the surface of copper, high cost, complexity in process and the like existing in conventional preparation of the graphene/copper compound powder. The method comprises the following steps of: at an oxygen-free atmosphere, under the condition that the air pressure is 0.001-101325Pa, increasing the temperature of organic copper salt powder to 600-1050 DEG C at the velocity of 1-500 DEG C/minute, performing heating for 0.1-600 minutes, and then performing cooling at the oxygen-free atmosphere to obtain the graphene/copper compound powder. According to the method provided by the invention, copper salt is adopted as a raw material, the price is low, equipment and operation are very simple, and batched production is easy to perform; and the preparation of copper nanometer particles and the coating of the graphene on the surfaces of nanometer particles are realized at the same time in the process of one-step heating.

The invention discloses a method for preparing sodium aluminum hydride, wherein liquid sodium, solid aluminum and hydrogen gas are reacted at heating condition to prepare the sodium aluminum hydride. The invention provides sodium aluminum hydride prepared by the method. The invention belongs to inorganic synthesis field. Compared with prior art, the method for preparing sodium aluminum hydride can finish preparation of the sodium aluminum hydride by one step. The technical scheme provided by the present invention is especially suitable for sodium aluminum hydride industrialization production.

The invention belongs to the technical field of organic and inorganic synthesis, particularly discloses a zinc complex constructed based on of 4-(2-methylimidazole) benzoic acid and application thereof. The molecular formula of a crystal is [Zn(MIBA)2]n, wherein HMIBA is negative one valent ligand 4-(2-methylimidazole) benzoic acid shown as a formula 1, and belongs to an orthorhombic crystal system; a P4nc space group, cell parameters a is equal to 14.1883(6) A-ring, b is equal to 14.1868(6) A-ring, c is equal to 13.5156(8) A-ring, and beta is equal to 90 degrees. A crystal material of the complex is synthesized by adopting a solvent thermal reaction, a zinc ion is taken as a node of four connections, and a three-dimensional fourfold interlaced microporous structure is formed by bridging ligand 4-(2-methylimidazole) benzoic acid. The crystal material of the complex has the advantages of adsorption performance and fluorescence performance. The microporous crystal material provided by the invention has high fluorescence performance and adsorption performance, and is important to the fields of petrochemical engineering, fine chemical engineering and the like. The formula 1 is shown in the description.

The invention discloses a preparation method of industrial high-grade pure potassium nitrate and belongs to the field of inorganic synthesis. The preparation method comprises (1) purified potassium nitrate aqueous solution preparation: adding deionized water and industrial potassium nitrate into a potassium nitrate reactor, heating the mixture to 60-80 DEG C, adjusting solution pH to 8.0-8.5 through a potassium hydroxide solution, filtering the solution through an ultra-micro filter with pore diameters of 0.2-1 micrometer, feeding the filtrate into a flash distillation concentration reactor, and adjusting solution pH of the filtrate to 6.5-7 through dilute nitric acid so that a purified potassium nitrate aqueous solution is obtained, and 2) high-grade pure potassium nitrate preparation: concentrating the purified potassium nitrate aqueous solution, putting the concentrate into a centrifugal machine, carrying out solid-liquid separation to obtain potassium nitrate crystals, putting thepotassium nitrate crystals into a vacuum drier and carrying out drying for 1-2h to obtain the superior grade pure potassium nitrate finished product. The preparation method of the industrial high-grade pure potassium nitrate has simple processes, high production efficiency, low impurity content and high purity.

The invention discloses a method for making inorganic synthetic paper. After first raw materials mainly composed of inorganic mineral powder, polypropylene (PP) and a modifier and second raw materialscomposed of reclaimed materials for preparing the inorganic synthesis paper are heated and fused through an extruder, a molten sheet of a single-layer structure or a three-layer structure is formed through a thin seam former (T-type mold), a sheet even in thickness and appropriate in crystallinity degree is formed through fast cooling molding, and then the inorganic synthetic paper is made through longitudinal drawing treatment, transverse drawing treatment, surface treatment and winding or cutting treatment. The production process is free of rejection ratio, good thickness uniformity, finished product density, finished product opaqueness and physical strength are achieved, the inorganic synthetic paper can be applied to various document, printing and packaging paper, cultural paper, synthetic paper, plastic films and thick materials, and the aim of widening the application range of the inorganic synthetic paper is achieved.