246 results about "Hydrate" patented technology

The invention discloses a novel synthetic method for 5-phenyl tetrazole, which includes the following steps: firstly performing acid neutralization to hydrazine hydrate; then adding mixing solution formed by cyanobenzene, water and ethyl alcohol to generate phenyl aminoguanidine salt; adopting sodium nitrite for diazotization to obtain nitrine amidine under the acidic condition; obtaining 5-phenyl tetrazole crude product through closed loop under the alkaline condition; obtaining 5-phenyl tetrazole acceptable product through adopting ethyl alcohol for refining. The method has the advantages of simple technology, simplicity in operation and high product yield.

The application discloses a continuous synthesis method of an amicarbazone intermediate 5-isopropyl-1,3,4-oxadiazole-2(3H)-ketone. The method comprises two continuous processes of hydrazinolysis and phosgenation: continuously feeding a mixture of isobutyric acid and a solvent, a mixture of hydrazine hydrate and a catalyst into a hydrazinolysis continuous reactor respectively, carrying out a warming reflux dehydration reaction, and obtaining an isobutyryl hydrazine solution shown in formula I; continuously feeding the isobutyryl hydrazine solution and phosgene into a phosgenation continuous reactor, carrying out a phosgenation reaction, and after distillation and desolventizing treatment of a reaction solution, obtaining 5-isopropyl-1,3,4-oxadiazole-2(3H)-ketone shown in formula II. The application has the advantages of simple reaction flow, high product yield, and significant production efficiency improvement, and is suitable for industrial large-scale production.

This invention relates to the field of oil and gas field development, and discloses a full-scale DAS (Digital Angiography and Semiconductor) device and method for monitoring the integrity of hydrate development wellbore. The device includes a formation simulation device, a wellbore simulation device, and a monitoring device. The formation simulation device comprises a temperature control system, a pressure control system, and a simulated formation. The temperature control system, pressure control system, and simulated formation are connected to the wellbore simulation device. The temperature control system and pressure control system are used to simulate the actual temperature and pressure of the hydrate formation. The simulated formation is prepared according to the actual mineral composition and grain size distribution of the hydrate reservoir. The monitoring device is located outside the wellbore simulation device and works in conjunction with the formation simulation device to perform real-time, full-well-section monitoring during hydrate development. This invention can simulate real wellbore conditions and perform real-time, continuous monitoring of the entire wellbore to meet the needs of dynamic downhole monitoring in actual production.

The present disclosure provides a vanadium electrolyte, a preparation method and use thereof. The method includes: adding sulfuric acid into vanadium-containing ore, and stirring to obtain a mixture; curing the mixture to obtain a clinker; leaching the clinker with water to obtain a vanadium-containing leaching solution; adding a first impurity-removing agent into the vanadium-containing leaching solution to obtain a first purified solution; adding an oxidizing agent, a ferric phosphate dihydrate seed crystal and a second impurity-removing agent into the first purified solution to obtain a second purified solution; adding a reducing agent and a flocculating agent into the second purified solution, and filtering a resultant solution to obtain a filtered solution; mixing the filtered solution with an extraction liquid to obtain a vanadium-supported organic phase; stripping the vanadium-supported organic phase to obtain a stripping liquid; and removing an organic phase from the stripping liquid to obtain the vanadium electrolyte.

This invention belongs to the technical field of medicinal chemistry, specifically relating to a novel crystal form of cariprazine, specifically the cariprazine-4-hydroxybenzoic acid-methanol-hemihydrate crystal form and its preparation method. The novel cariprazine-fumaric acid crystal form provided by this invention comprises a basic unit of one molecule of cariprazine, one molecule of 4-hydroxybenzoic acid, one molecule of methanol, and 0.5 molecules of water. Its preparation method is simple to operate, the crystallization process is easy to control, and it has good reproducibility. The formation of a eutectic significantly enhances the solubility of cariprazine, exhibiting strong pharmaceutical value.

This invention relates to the field of functional materials technology, and discloses a ruthenium-based catalyst for the acidic oxygen evolution reaction (OER), its preparation method, and its application. The preparation method includes dissolving 100-200 parts by mass of RuCl3·H2O and 1-40 parts by mass of VCl3 in 20-60 parts by volume of anhydrous methanol, stirring to obtain a mixed solution; slowly adding hydrazine hydrate dropwise to the mixed solution, continuing stirring, centrifuging and filtering; washing alternately with anhydrous methanol and ultrapure water, freeze-drying, and heat-treating at 300-500℃ for 1-4 hours to obtain a V-doped RuO2 catalyst. The prepared V-RuO2 catalyst exhibits excellent initial activity and long-term durability under acidic conditions, providing a new solution for developing high-performance anode catalysts suitable for proton exchange membrane water electrolyzers.

This invention discloses a covalent organic framework material for selective solid-phase adsorption and separation, its preparation method, and its applications. The material is prepared by polycondensation reaction of electron-deficient triazine rings with short-chain linkers such as hydrazine hydrate, forming a layered structure with a high specific surface area of ​​602 m² / g and a concentrated pore size of 2.0 nm to 3.0 nm. This structure exhibits high adsorption capacity (up to 1.0 mg / g), rapid adsorption kinetics, and excellent selectivity for PAHs in organic solutions through strong π-π interactions and pore confinement effects. The preparation process is simple and the conditions are mild. The material has good thermal stability (>300℃), and its performance retention rate is higher than 92% after 5 cycles. When applied to the solid-phase adsorption of PAHs in petroleum products such as lubricating oil and white oil, it effectively eliminates matrix interference, allowing direct analysis without complex purification steps after adsorption. This overcomes the limitations of traditional materials such as silica gel and activated carbon, which have weak adsorption capacity and require cumbersome post-treatment, providing a new high-performance adsorption material solution for the efficient detection of trace PAHs in petroleum products.

The application provides a kind of sodium sulfide nine hydrate and activated olefin / acetylene preparation polyether and its method, belong to sulfur-containing polymer technical field.The structural formula of polyether in the application, R 1 And R 2 Independently be substituted or unsubstituted alkyl, substituted or unsubstituted alkoxy, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl;The number of carbon atoms of the alkyl is 1-10, the number of carbon atoms of alkoxy is 1-10, the number of carbon atoms of aryl is 1-30, the number of carbon atoms of heteroaryl is 3-30;Substituted alkyl and substituted alkoxy independently are one or more;N is an integer of 2-4000.The application is used as sulfur source sodium sulfide nine hydrate, under the condition of no metal catalyst, polyether is synthesized by polymerization reaction;Reaction condition is mild, reaction is efficient, economic and environmental protection, meet the current green production concept and can avoid the use of dangerous reagent.

This invention provides novel stem cell activators, topical skin agents containing the aforementioned stem cell activators, and skin cosmetics containing the aforementioned stem cell activators. The stem cell activator of this invention comprises at least one compound selected from compounds (including optically active agents) shown in formula (1), salts of the aforementioned compounds, and hydrates thereof as active ingredients. In the following formula, R... 1 R 2 Represents a hydrogen atom or a hydrocarbon group. R 3 Represents a hydrogen atom or an organic group. n represents an integer greater than or equal to 1. The above hydrocarbon groups may have substituents. [Chemical Formula 1]

The present application relates to a kind of preparation method of trifluoromethyl pyrazole compound, belong to the technical field of organic synthesis.The specific method is: (1) trifluoroacetyl ethyl acetate is first with hydrazine hydrate cyclization reaction and generates compound of formula III;(2) under the catalysis of base, compound of formula III is reacted with difluoromethylation reagent and generates compound of formula II;(3) compound of formula II is reacted with methylating agent and obtains compound of formula I;The difluoromethylation reagent is difluoro-monochloromethane or sodium difluoro-monochloroacetate;The methylating agent is chloromethane, bromomethane, iodomethane, dimethyl sulfate or dimethyl carbonate.The present application is prepared by changing reaction route, and the higher-priced raw material methylhydrazine is replaced, and isomer impurity is no longer generated in the product prepared.Not only raw material cost is reduced, but also the purity of product is improved.

This invention discloses a platinum-based catalyst for the hydrogenation reaction, its preparation method, and an electrode. The catalyst uses orthorhombic niobium pentoxide (T-Nb₂O₅) as a support to support the active component platinum. The support is resistant to strong acids and electrochemical corrosion at potentials above 1.0 V (vs RHE). The catalyst exhibits a hydrogenation reaction current density of not less than 200 mA·cm⁻¹ at 0.45 V (vs RHE). ‑2 In preparation, ammonium niobate oxalate hydrate was used as the niobium source, and the mixture was gelled via a sol-gel method. The gel was then heat-treated at 600-700℃ to obtain an orthorhombic niobium pentoxide support. The pH was adjusted to less than 3, and platinum was reduced with sodium borohydride to prepare the catalyst. This catalyst was then used to fabricate a hydrogen depolarization anolyte gas diffusion electrode with a platinum loading of 0.5-1.0 mg·cm³. ‑2 It can operate continuously and stably for no less than 120 hours with a cell voltage in the range of 1.25-1.45V. The catalyst of this invention has high activity and excellent stability, and can be used as a hydrogen depolarization anode in hydrometallurgy, significantly reducing electrolysis energy consumption and making it suitable for industrial applications.

This invention relates to a compound containing trifluoromethyloxadiazole and a spirocyclic structure, or a pesticide-acceptable salt, hydrate, or solvate thereof, characterized in that the structure of the compound containing trifluoromethyloxadiazole and a spirocyclic structure is shown in general formula I. Compared with the prior art, the compound provided by this invention can be used to prepare histone deacetylase inhibitors, effectively inhibiting the growth and reproduction of various rust fungal spores, with effects comparable to fluopyram.

An aspect of the present disclosure provides a humidity control composition capable of greatly reducing the corrosiveness to metals, reducing the generation of unpleasant odor, and being highly safe while maintaining the humidity control performance. An aspect of the present disclosure relates to a humidity control composition characterized by a humidity control component of a deliquescent salt that forms a hydrate crystal at a prescribed critical relative humidity, and a water-absorbing material having a high water-absorbing property with respect to an electrolyte aqueous solution.

This invention discloses a process for preparing ultrafine glass powder using a spray pyrolysis method in the field of glass encapsulation materials. The process first prepares a homogeneous solution A using boric acid, aluminum nitrate nonahydrate, alkaline earth metal nitrates, lithium acetate, sodium acetate, and potassium acetate. Tetraethyl orthosilicate is dissolved in anhydrous ethanol to obtain solution B. A rare earth transition metal composite oxide nanoclusters encapsulated with a silica shell hybrid inorganic modifier is dispersed in anhydrous ethanol to obtain suspension C. Solution B and suspension C are mixed, and deionized water and hydrochloric acid are added to adjust the pH. After pre-hydrolysis and cooling, triethyl borate is added dropwise for co-condensation, and then mixed with solution A. After adjusting the pH and aging, the mixture is ultrasonically atomized and spray pyrolyzed to obtain ultrafine glass powder. The glass powder obtained by this invention has small particle size, high sphericity, and can be continuously produced.

The present invention relates to a preparation method for a high-purity Jaktinib dihydrochloride monohydrate compound represented by formula (A). The whole process does not comprise special reaction conditions and complex post-treatment processes, and is easily available in raw materials and reagents, high in conversion rate, environment-friendly, and very suitable for industrial production.

The application provides a method for improving the yield of oxygen-containing compounds in low-rank coal-derived soluble matters, and belongs to the technical field of low-rank coal pretreatment, and comprises the following steps: first, performing ozone oxidation pretreatment on low-rank coal to obtain modified low-rank coal; using cobalt acetate, copper acetate and iron acetylacetonate as a cobalt source, a copper source and an iron source respectively, using hydrazine hydrate as a strong reducing agent, and using a one-pot hydrothermal method to obtain magnetic Co-CuFe2O4 nanospheres; and using the prepared Co-CuFe2O4 nanosphere catalyst to perform catalytic ethanolysis reaction on the low-rank coal subjected to ozone oxidation pretreatment. In the application, appropriate ozone oxidation pretreatment can effectively improve the activity of the low-rank coal, and when the magnetic Co-CuFe2O4 nanospheres are applied to catalytic ethanolysis reaction of the low-rank coal subjected to ozone oxidation pretreatment and catalytic ethanolysis reaction of low-rank coal-related model compounds, the magnetic Co-CuFe2O4 nanospheres all exhibit excellent catalytic activity, higher-yield soluble components can be obtained, the yield of oxygen-containing compounds in the derived soluble matters is improved, and efficient and high-value utilization of the low-rank coal is realized.

The present invention relates to a method for purifying (PU) at least one aqueous medium based on at least one C-glycoside derivative corresponding to formula (I) (preferably corresponding to formula (I') or (I''), and optical or geometric isomers thereof, and / or solvates (e.g., hydrates) thereof, and at least one salt, comprising at least one step of electrodialysis (PU1) of the aqueous medium. The present invention also relates to a method for preparing (PR) at least one C-glycoside derivative as described herein, comprising at least one step of electrodialysis (PU) of at least one aqueous medium containing at least the C-glycoside derivative and at least one salt. JPEG2026518301000030.jpg41170

This invention discloses a system and method for separating carbon dioxide gas using a hydrate method. The system includes: a reaction vessel with an inner and outer cavity structure, the outer surface of which is equipped with a constant temperature layer; an external circulation unit that injects a high-concentration TBAB solution into the inner cavity and forms type A TBAB hydrate crystals therein, while the hydrate slurry flows from the inner cavity into the outer cavity and is discharged from the outer cavity for reuse; an inlet unit that injects a low-temperature, high-pressure mixed gas containing CO2 into the inner cavity; and an internal circulation unit that injects a low-concentration TBAB solution into the inner cavity, converting type A TBAB hydrate into type B TBAB hydrate while simultaneously using type A TBAB hydrate crystals as inducing particles to undergo a hydration reaction with the mixed gas in the inner cavity; after the reaction, the hydrate slurry dissolves and captures CO2 while the remaining liquid phase is discharged for reuse. This invention reduces energy consumption and, by adding inducing crystal nuclei, effectively shortens the induction time, achieving a continuous process of introducing inducing crystal nuclei and generating hydrates in a closed system, effectively improving separation efficiency.

This invention discloses a magnetic Ni x％ This paper describes the preparation method and application of FeNb2O6 composite catalysts, which fall under the technical field of supported bimetallic oxide catalysts. First, magnetic FeNb2O6 nanocatalysts are prepared via a one-pot hydrothermal method using niobium oxalate hydrate as the niobium source and ferric nitrate as the iron source. Then, magnetic Ni is prepared via a modified deposition precipitation method using nickel nitrate as the nickel source and the magnetic FeNb2O6 nanocatalyst as the support. x％ @FeNb2O6 composite catalyst. The beneficial effect of this invention is that Ni... x％ In the FeNb2O6 composite catalyst, iron, niobium, and nickel species are highly dispersed with no obvious agglomeration, exhibiting high activity and high stability. Furthermore, the catalyst's magnetic properties allow for recovery and reuse, overcoming the shortcomings of traditional metal catalysts such as easy loss and difficulty in recovery after reaction. This Ni... x％ The FeNb2O6 composite catalyst is used for the catalytic hydrogenation conversion of Caragana korshinskii and its related model compounds. Due to its high C-O- bond cleavage activity, it can more effectively promote the depolymerization of Caragana korshinskii organic matter, thereby obtaining bio-oil rich in high-value COH functional groups.

The application discloses a tundish slag line dry material, and relates to the technical field of tundish refractory materials. The mass percentage of each raw material component in the tundish slag line dry material is as follows: 26-30% of 3-1mm fused magnesite, 22-28% of 1-0mm fused magnesite, 20-27% of 200-mesh fused magnesite, 1.5-2% of trisodium phosphate hexahydrate, 2-2.5% of sodium metasilicate nonahydrate, 1-1.5% of adipic acid, 4-5% of calcium carbonate, 0.3-0.5% of vermiculite, and the rest of 5-3mm fused magnesite. The application adopts a new composite binder system, solves the environmental protection problem of a traditional phenolic resin binder, and significantly improves the medium-temperature and high-temperature strength, corrosion resistance, thermal shock resistance and heat insulation performance of the magnesia dry material through the synergistic effect among the components, so that the overall optimization of the material performance is realized.

A hydrate decomposition inhibiting composition, a coupling enhanced solid hydrate, and a method for improving the solid hydrate storage and transportation stability relating to the technical field of natural gas safety storage and transportation are provided. The hydrate decomposition inhibiting composition contains a carboxymethyl starch salt and an alkyl glycoside surfactant. The composition improves the interface stability of the hydrate phase boundary and the mechanical stability of the hydrate and enhance the strength of the hydrate crystal interface since the colloidal solution formed by dispersing the sodium carboxymethyl starch and the alkyl glycoside surfactant in water can coat the surface of the hydrate to form a protective layer, thereby improving the structural stability of the hydrate. Therefore, the composition inhibits the decomposition of the hydrate, reduces the decomposition rate of the hydrate, and can further reduce the decomposition amount of the hydrate.

The present application relates to the technical field of catalytic materials, and discloses a halloysite nanotube loaded palladium-platinum bimetallic alloy catalyst and a preparation method thereof, the catalyst comprising heat pretreated halloysite and uniformly dispersed palladium-platinum bimetallic alloy particles, and the mass ratio of palladium, platinum and heat pretreated halloysite being 0.012-0.022:0.012-0.022:1. The preparation method comprises mixing the heat pretreated halloysite with palladium chloride and chloroplatinic acid hexahydrate, adding concentrated ammonia water to adjust the pH to 9-11 to form an ammonia complex; obtaining a precursor through a hydrothermal reaction, and adding sodium borohydride for liquid phase reduction. The bimetallic alloy phase produces geometric and electronic synergistic effects, thereby reducing the reaction activation energy; the ammonia complex ion is chemically bonded with the hydroxyl group of the carrier to prevent the loss of active components in the hydrothermal environment. The catalyst is combined with glycerol to produce hydrogen in situ, thereby avoiding the safety hazards and equipment investment of external high-pressure hydrogenation, and realizing the high-yield conversion of green diesel under extremely low noble metal loading.

In an iron (II) citrate monohydrate, identified by the formula FeC6H6O7-H2O ( Ferrous citrate monohydrate or iron citrate (II) monohydrate), obtained according to a particular production method, citric acid and elemental iron are bound in a molecular complex where the iron is agglomerated in the citrate which moves to a cyclic form and the iron is bound to the O groups of the carboxylic groups 1 and 3 through ionic bonds, forming two enantiomers, D and L (R and S), both perfectly water-soluble and highly assimilable by the human body. Formula (L) & Formula (D). With a different absorption mechanism from traditional iron molecules, said iron citrate monohydrate is usable in pharmaceutical and / or nutraceutical and / or food compositions, in particular in the treatment and prevention of iron deficiency anemias and in general of all diseases and disorders associated with iron deficiency. The effectiveness is proven by several examples.

This invention discloses a biomimetic tree-like hydrate promoting device, belonging to the technical field of natural gas hydrate preparation. It uses tree-like absorbent paper modified with sodium dodecyl sulfate. The device includes a main trunk and 10 branches symmetrically distributed on both sides of the trunk's centerline. The width of the main trunk gradually decreases from bottom to top. The branches are spaced apart along the bottom of the main trunk, and the length of each branch gradually decreases from bottom to top along the length of the main trunk. The length of each branch is the distance from the center of the branch's edge to the center of its end. The width of the branches first increases and then decreases in the direction away from the main trunk. By mimicking the shape of a natural tree, a larger surface area is provided, allowing more gas and water molecules to contact the surface of the promoting material, effectively increasing the gas-liquid contact area and accelerating the hydrate formation process. Especially within a limited space, it enables more efficient gas conversion and rapid growth of methane hydrates.

This invention relates to the field of printed circuit board manufacturing technology and discloses a fine etching process for PCB circuit patterns. The process includes injecting a fine etching composition comprising deionized water, hydrochloric acid, copper chloride dihydrate, anhydrous magnesium chloride, p-toluenesulfonic acid monohydrate, polyethylene glycol, and 2-mercaptobenzimidazole into a circulating working tank of an etching machine; setting the temperature of the working solution in the circulating working tank; sending the substrate to be etched, after dry film development, into a spray section; activating the spray array and setting the spray pressure to etch the substrate; and rapidly rinsing the etched substrate in a deionized water washing section, followed by strong air drying to obtain the circuit pattern. This invention reduces surface tension through specific components to promote solution penetration into the microstructure, utilizes an organic corrosion inhibitor to form a stable protective layer on the trench sidewalls, and combines the vertical impact of the nozzle jet on the bottom, leveraging the difference between mechanical force and chemical adsorption force to achieve anisotropic etching, thus suppressing lateral corrosion of fine circuits.

To provide a method for producing dry coated sand that can manufacture molds with excellent mold strength and surface strength. [Solution] A method for producing dry coated sand, comprising the step (1) of mixing water with refractory aggregate A having an inorganic binder layer formed on its surface containing an inorganic binder containing a metasilicate hydrate, A method for producing coated sand, wherein the mass ratio of the inorganic binder water (a component of the inorganic binder other than water) to the water in the coated sand (mass of water in the coated sand / mass of the inorganic binder water) is 1.00 to 1.60.

This invention discloses a method for preparing ethyl 4-pyrazolamide. A dichloromethane solution of ethyl 3-(N,N-dimethylamino)acrylate is added dropwise to a dichloromethane solution containing a chlorine-containing reagent and N,N-dimethylformamide. After addition, the mixture is stirred until the reaction is complete, yielding a reaction solution. The reaction solution is then directly added dropwise to an alcoholic solution of hydrazine hydrate, and the resulting reaction yields ethyl 4-pyrazolamide. This method uses readily available raw materials, has mild reaction conditions, high yield, and is easily industrialized.

A novel steviol glycoside has been demanded. According to one aspect of the present invention, there is provided a compound represented by formula (1) (wherein (i) R1 represents Xyl(1-2)Glc1- and R2 represents Glc(1-2)Glc1-; or (ii) R1 represents Glc(1-2)Glc1- and R2 represents Glc(1-2)[Xyl(1-3)]Glc1- wherein Glc represents glucose and Xyl represents xylose), or a salt or hydrate thereof.

The application discloses a self-supporting fracturing fluid system prepared by using various natural salt water and application thereof, and provides a self-supporting fracturing fluid system for development of geological energy (in particular, oil and gas, geothermal energy and natural gas hydrate), which is not affected by ion concentration in seawater, salt lake water and surface water, has low requirement on water source, can be prepared by using various types and concentrations of mineralization water source at the same time, and can be directly prepared by using various surface water to prepare the self-supporting fracturing fluid system, so that the requirement of water source for fracturing technology in areas lacking fresh water is met.

This invention relates to a method for preparing ZnIn2S4 adsorbents, specifically an ultrasonic atomization method based on zinc indium sulfide, belonging to the field of catalytic material preparation technology. The invention aims to address the problems of poor chemical stability and weak surface reaction kinetics in existing sulfide preparation methods. The method involves using zinc chloride, indium trichloride tetrahydrate, and thioacetamide as raw materials, and employing a hydrothermal method combined with ultrasonic atomization at 0 MHz, 1.0 MHz, 2.4 MHz, and 3.0 MHz to prepare ZIS-0, ZIS-1.0, ZIS-2.4, and ZIS-3.0 photoadsorbents, respectively. This method utilizes the acoustic cavitation, hotspot, and aggregation effects of ultrasonic atomization to achieve precise particle size control, increase specific surface area, and shorten the crystallization cycle, significantly improving the adsorption efficiency of atrazine. The preparation process of this invention is mild and simple, and the obtained materials exhibit excellent atrazine adsorption properties in aqueous solutions.