38 results about "Inorganic Synthesis Techniques" patented technology

The method for preparing sodium chromate by calcining chromite includes the following steps: pulverizing chromite and sieving with 200 mesh sieve, adding sodium carbonate whose added amount is 80-150% of chromite amount, and adding magnesite, baudisserite, periclase, brucite or synthetic magnesium oxide, magnesium hydroxide and magnesium carbonate and calcining them at 1000-1200 deg.c for 10-60 min. under the condition of oxidation atmosphere, then extracting clinker and dissolving sodium chromate so as to obtain the goal of preparing sodium chromate. The conversion rate of chromite can be upto 97-99.5%.

The invention belongs to the technical field of inorganic synthesis, and particularly relates to a preparation method of hexagonal boron nitride powder and three-dimensional boron nitride. According to the preparation method, a chemical vapor deposition method is adopted, transition metal elementary substance powder or a compound containing transition metal elements is taken as a catalyst, and a porous metal catalyst skeleton is prepared through high-temperature reduction reaction; hexagonal boron nitride grows with the chemical vapor deposition method so as to obtain the hexagonal boron nitride powder with the catalyst skeleton and the three-dimensional boron nitride. According to the preparation method, the operation is simple and convenient, the requirement for equipment is low, and the yield is high; the hexagonal boron nitride powder and the three-dimensional boron nitride can be rapidly and massively prepared, the obtained three-dimensional boron nitride has the advantages of small space ranging from 100 nanometers to 100 micrometers, high density up to 100 mg/ cm<3> and the like, the three-dimensional boron nitride and the boron nitride powder have the wide application prospect in the aspects of space heat conduction, catalyst carriers, sound absorption, shock resistance and the like.

A process for preparing the light-weight flaky calcium carbonate used for coating on paper includes such steps as preparing the solution of soluble Ca salt, preparing the solution of soluble carbonate, slowly adding one to another, reaction to obtain crystal seeds of calcium carbonate, adding them along with mother liquid to refined lime milk, stirring, filling CO2, carbonizing, filtering and drying.

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 belongs to the technical field of inorganic synthesis, and provides a method for preparing a NaY molecular sieve from active silicon powder and recycling mother liquor. The method comprises the following steps: S1, preparing active silicon powder; S2, preparing a NaY molecular sieve crystallization guiding agent; S3, performing gel forming; S4, performing crystallization; S5, recycling the mother liquor. Compared with water glass, alkali cannot be brought in by introducing a silicon source, the alkalinity cannot exceed the alkalinity requirement of NaY synthesis after the guiding agent and the low-alkalinity sodium metaaluminate are added, and aluminum sulfate is not needed for neutralization; unnecessary acid-base neutralization is avoided, the alkali consumption is reduced, and the cost is reduced; meanwhile, the mother liquor after crystallization of the molecular sieve does not contain sodium salt, and the mother liquor can be directly recycled.

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 belongs to the technical field of inorganic synthesis, and specifically relates to a method for directly growing hemimorphite zinc silicate on a glass substrate, comprising the following steps: taking zinc chloride, cetyltrimethylammonium bromide, and Dissolve in distilled water; Dissolve and mix separately; Add ammonia water and stir to obtain a suspension; Prepare a clean glass slide as a substrate and put it into the suspension; Put it in an autoclave and keep it warm; Take out the slide after keeping warm ; Put the glass slide into the sintering furnace and sinter to obtain hemimorphite zinc silicate. In the above method, silicon element is provided by the substrate, and the hemimorphite zinc silicate can be prepared without adding additional silicon-containing compound raw materials, which is simple, easy to operate, and easy to control.

The invention discloses a preparation method of a TiO2/wollastonite compound, belonging to the technical field of inorganic synthesis. The preparation method comprises the following steps: adding a water-soluble polymer emulsion as a binder, adding a dispersing agent PEG, and preparing the uniformly coated TiO2/wollastonite compound under the conditions of water bath heating and stirring at 15 DEGC, the TiO2/wollastonite compound has a plate-shaped structure, and the surface layer is uniformly coated with a layer of rutile titanium dioxide. Compared with the prior art, tests show that the product prepared by the method has the characteristics of high whiteness, uniform TiO2 coating, good weather resistance and the like. The preparation method is simple in operation process and low in equipment requirement, and has very good industrial production value and application prospect.

The invention relates to the technical field of inorganic synthesis, and discloses a preparation method of platinum nitrate, which comprises the following steps of: (1) completely dissolving sponge platinum in a mixed solution of nitric acid and hydrochloric acid, concentrating, removing nitrate by using concentrated hydrochloric acid, and separating a product to obtain a chloroplatinic acid solid; (2) heating and decomposing the chloroplatinic acid solid to obtain a platinous chloride solid; (3) dissolving the platinous chloride solid in hydrochloric acid to obtain a chloroplatinous acid solution; (4) adding a sodium hydroxide solution into the chloroplatinous acid solution for precipitation reaction, separating out a precipitation reaction product, and washing the precipitation reaction product to remove chloride ions to obtain a platinum-containing precipitate; and (5) mixing the platinum-containing precipitate with concentrated nitric acid, reacting, and separating a product to obtain platinum nitrate. According to the method, chloroplatinic acid is converted into chloroplatinous acid by adopting a mode of firstly decomposing at high temperature and then dissolving with hydrochloric acid, so that the yield of platinum nitrate can be improved.

The invention relates to a method for preparing nano TiO2/wollastonite compound used for papermaking, which belongs to the technical field of inorganic synthesis. The invention discloses a new methodwhich is not reported yet, and the method successfully synthesizes a novel nano TiO2/wollastonite compound product with uniform coating, and the properties of the compound product can reach the standard. The compound product obtained by the preparation method is in a plate-like structure, and has the characteristics of high whiteness, uniform coating and good weather resistance. When the obtainedcompound product is used as a papermaking filler, the properties of the paper are similar to those of titanium dioxide as a filler. The production process of the invention is simple, and the rate forintroducing gas and the addition amount of titanium dioxide can be controlled, so that the size of the titanium dioxide particles and the coating rate of wollastonite can be adjusted, the wollastonitesurface is uniformly coated, the yield is high, the reaction condition is mild, and industrial production is easy to be realized.

The invention provides a waste acid and waste saline treatment system with combination of inorganic synthesis and carbon absorption and a waste acid and waste saline treatment method with combination of inorganic synthesis and carbon absorption. The waste acid and waste saline treatment system comprises a waste saline pool, a waste acid pool, a chlorine gas synthesis tower, a filtering component and an active-carbon-absorption chlorine gas tower, wherein the waste saline pool is used for storing waste saline; the waste acid pool is used for storing waste acid liquor; the chlorine gas synthesis tower is used for treating the waste saline and the waste acid under a vacuum state; the filtering component is used for filtering the waste liquor after treatment of the chlorine gas synthesis tower; the active-carbon-absorption chlorine gas tower is used for purifying chlorine gas after treatment of the chlorine gas synthesis tower; the inlet of the chlorine gas synthesis tower is connected with the outlet of the waste saline pool and a waste acid pipeline, and a waste liquid outlet of the chlorine gas synthesis tower is connected with the filtering component, and the chlorine gas outlet of the chlorine gas synthesis tower is connected with the active-carbon-absorption chlorine gas tower. The waste acid and waste saline treatment system provided by the invention has the advantages that the combination of an inorganic synthesis technology and an active-carbon absorption technology is adopted, and the problem of waste water treatment in a sponge titanium project is fundamentally solved.

The invention discloses a method for preparing a spinel structure cobalt aluminate pigment by a solution combustion method, and belongs to the technical field of inorganic synthesis. A solution combustion method is used, metal nitrate is used as a raw material, organic amine used as a fuel and water are prepared to a solution, the reaction temperature and the raw material proportion are controlledto selectively synthesize CoxAl2O3 + x (x = 0-1) series spinel structure cobalt blue powder pigments with different element proportions, and the preparation requirements of high-purity and high-yieldcobalt blue nano powder are met. The method provides a new green and high-yield reaction route for the cobalt blue pigment, and has the advantages of low raw material cost, high yield, low energy consumption, no pollution, selective synthesis and the like.

The invention discloses a preparation method of a fire coal type boiler for fire coal increasing effect and bonding of crushed coal, belongs to the technical field of organic or inorganic synthesis, and in particular relates to a method using sulphur as an initiating agent and potassium carbonate, potassium nitrate, sodium nitrite, potassium permanganate, cellulose and maltodextrin as a combustion-supporting adhesive.

The invention discloses a modified production method of a Y-shaped molecular sieve and belongs to the technical field of inorganic synthesis.An exhaust pipe is moved from a feed end of a rotary kiln to its discharge end, and it is possible to produce the Y-shaped molecular sieve with different lattice cell constant and having the same effect of using high-temperature steam, by using moisture of the Y-shaped molecular sieve that is rare earth exchanged or ammonia exchanged and then pre-dried, and by controlling tail gas emission of the exhaust pipe at the discharge end of the rotary kiln, heating temperature of the rotary kiln and the time of a material retaining in the kiln.High-temperature steam is not introduced herein, the cost is low, operating is simple, and a product has low content of sodium oxide, and the method is worthy of popularization.

The invention provides a method for preparing a NaY molecular sieve by recycling a NaY mother liquor, and belongs to the technical field of inorganic synthesis. The method solves the technical problems of low NaY mother liquor recycling rate, large pollution, high utilization cost and the like in the prior art. The synthesis method comprises the following steps: (1) stirring NaY mother liquor until the NaY mother liquor is uniform; (2) slowly adding a metered supplementary silicon source into the mother liquor according to the modulus of 3.0-3.4 until the supplementary silicon source is completely dissolved in the pulped NaY mother liquor, and controlling the temperature of the mixture of the NaY mother liquor and the supplementary silicon source to be 30-80 DEG C in the dissolving processto obtain high-modulus recycled water glass; and (3) synthesizing the NaY molecular sieve by utilizing the recycled water glass obtained in the step (2) according to a gel method. According to the method, the NaY mother liquor can be completely recycled, and the pollution of waste liquor and waste residues to the environment is reduced.

The invention relates to a preparation method of monosilane and belongs to the technical field of inorganic synthesis. The preparation method of the monosilane comprises the following preparation steps of: a, carrying out decomposition reaction on hydride and silicon tetrachloride to obtain monosilane and chloride; b, electrolyzing the chloride obtained in step a to obtain elemental chlorine and metallic simple substance; and c, enabling the elemental chlorine obtained in step b to react with metal silicon to obtain silicon tetrachloride, enabling the metallic simple substance to react with hydrogen gas to obtain hydride, and returning the obtained tetrachloride and the hydride to step a, wherein the hydride is sodium hydride or lithium hydride. According to the preparation method of the monosilane disclosed by the invention, the by-products generated in the process flow are returned to the system while the closed-loop use of the materials is achieved, so that the utilization rate of the materials is improved, and the preparation method can be used for the large-scale production. Meanwhile, the preparation method has the advantages of being free of catalyst, high in conversion rate and the like.

The invention relates to the technical field of inorganic synthesis, and discloses a preparation method of a trivalent rhodium acetate tripolymer, which comprises the following steps: (1) mixing rhodium powder and potassium chloride, and introducing chlorine for reaction; (2) dissolving the product obtained in the step (1) in water, filtering, adding potassium hydroxide into the filtrate for reaction, filtering and washing to obtain rhodium hydroxide; and (3) adding water, nitric acid and glacial acetic acid into rhodium hydroxide for reaction, after the reaction is completed, evaporating the solution to dryness, performing nitrate removal with glacial acetic acid, and performing acid removal with water to obtain the trivalent rhodium acetate tripolymer. The nitric acid and the glacial acetic acid are adopted to dissolve rhodium hydroxide, and then the glacial acetic acid is used for removing nitrate, so that the reaction can be obviously accelerated, and the yield of the trivalent rhodium acetate tripolymer is improved.

The invention belongs to the technical field of inorganic synthesis, and relates to a method for preparing a NaY molecular sieve by taking polyaluminum chloride as an aluminum source and recycling mother liquor, which comprises the steps of S1, preparing a NaY molecular sieve crystallization guiding agent; S2, conducting gel forming, specifically, mixing sodium silicate, polyaluminum chloride, low-alkali sodium metaaluminate, a guiding agent and water according to the molar ratio of Na2O to Al2O3 to SiO2 to H2O being (2.2-8.5) to 1 to (7-16) to (100-380), and uniformly stirring at the temperature of 10-60 DEG C for 0.5-5 hours; S3, carrying out crystallization, specifically, crystallizing the mixture in a reaction kettle at the temperature of 80-120 DEG C for 6-48 hours, filtering, washing and drying to obtain a product NaY, and collecting filtered mother liquor. The method provided by the invention consumes less alkalinity, can reduce the consumption of low-alkali sodium metaaluminate and reduce the cost, and adopts polyaluminum chloride and low-alkali sodium metaaluminate to introduce an aluminum source, so that the concentration of sodium salt in the mother liquor can be reduced, and direct reuse of the mother liquor is facilitated.