41 results about "Hydrazine monohydrate" patented technology

The present invention relates to an environmentally benign process for the simultaneous preparation of nanocrystalline anatase titanium dioxide and hydrazine mohydrochloride, in substantial amounts from the acidic aqueous titanium tetrachloride solution by reacting with hydrazine monohydrate at ambient conditions of temperature and pressure. The process of the present invention is simple, easy to operate, pollution free, high in product purity and homogeneous in product particle.

The invention provides a preparation method of an oil-soluble chitosan derivative. The preparation method is characterized by including following steps: 1), adding chitosan into N, N-dimethylformamidecontaining water, adding phthalic acid for first reaction, and filtering and washing after reaction is finished to obtain an intermediate product; 2), adding the intermediate product and fatty acid acyl chloride into an isopropanol solvent for second reaction, using hydrazine monohydrate and sodium hydroxide water solution to treat a product, using distilled water to wash the product after freeze-drying, and freeze-drying to obtain oil-soluble chitosan. The invention further provides the oil-soluble chitosan derivative and application thereof. The preparation method has the advantages of being easy-to-get in raw material, high in environment friendliness and wide in application prospect, and O-acylated chitosan prepared by the method can be widely applied in the field of antioxidation ofplant insulating oil.

The invention discloses amphipathic chitosan with a chemical crosslinking characteristic and a preparation method thereof. The method comprises the following steps of: reacting chitosan with long-chain aliphatic aldehyde to obtain N-long-chain alkyl chitosan; reacting the N-long-chain alkyl chitosan with phthalic anhydride; reacting an obtained product with iodo-polyethylene glycol monomethyl ether; and performing a deprotection reaction on an amino group by using hydrazine hydrate to obtain N-long-chain alkyl-O-polyglycol chitosan. In a preparation process, the method effectively protects the amino group in a chitosan molecule, avoids introducing a polyglycol group on the amino group, and remains part amino group in the amphipathic chitosan by removing the amino group protection; the product can serve as a precursor for preparing amphipathic chitosan hollow microcapsules; and polyethylene glycol with high biocompatibility, low toxicity and easy degradation is introduced on a hydroxyl group of the chitosan to serve as a hydrophilic group, so that the research and application values of the derivative on a medicament carrier are improved.

Etch assisting agents for focused ion beam (FIB) etching of copper for circuit editing of integrated circuits both prevent loss of adjacent dielectric due to sputtering by the ion beam, and render sputtered re-deposited copper on adjacent surfaces non-conductive to avoid electrical short circuits. The agents comprise hydrazine and hydrazine derivatives having an N—N(N being Nitrogen) bonding in their molecules and boiling points between about 70° and 220° C., and NitrosAmine derivatives saturated with two hydrocarbon groups selected from Methyl, Ethyl, Propyl and Butyl. Preferred agents are Hydrazine monohydrate (HMH), HydroxyEthylHydrazine (HEH), NDMA, NMEA, NDEA, NMPA, NEPA, NDPA, NMBA or NEBA, alone or in combination with Nitrogen Tetroxide. The agents are effective for etching copper in high aspect ratio (deep) holes.

The invention provides a multifunctional self-repairing polyurethane reticulate pattern coating and a preparation method thereof. The multifunctional self-repairing polyurethane reticulate pattern coating is prepared from the following raw materials in parts by weight: 30 to 40 parts of hexanediol polycarbonate, 20 to 30 parts of isophorone diisocyanate, 5 to 10 parts of dimethylolpropionic acid,2 to 2.5 parts of triethylamine, 0.5 to 1 part of diethylene glycol, 0.2 to 0.5 part of hydrazine monohydrate, 20 to 25 parts of a nano active matter-bimetal layered polymer, 20 to 25 parts of a metalinorganic salt-porous material, 7-10 parts of a leveling agent, and 5-10 parts of a pigment. Two different nano containers are used for respectively packaging two inhibitors aiming at different corrosion triggering mechanisms and protection mechanisms; and moreover, polycarbonate adipate into which a carbonate part is introduced is used as a matrix of the polyurethane coating, and meanwhile, acid-base, microorganism and rainwater residues are resisted, so that the polyurethane coating has the characteristics of good ageing hydrolysis resistance, oil resistance, weather resistance and microorganism decomposition corrosion resistance.

The invention relates to a preparation method for a high-selectivity Hg<2+> color indicator based on a Rhodamine B thiohydrazine derivative. The preparation method comprises the following steps: performing condensation reaction on Rhodamine B and hydrazine monohydrate to generate Rhodamine B hydrazine; performing reaction on the Rhodamine B hydrazine and a Lawesson reagent; after replacing a carbonyl oxygen atom in the Rhodamine B hydrazine with a sulphur atom capable of selectively identifying heavy metal Hg<2+>, obtaining the Rhodamine B thiohydrazine derivative, wherein a water-ethanol mixed solution based on the Rhodamine B thiohydrazine derivative can be taken as an Hg<2+> color indicator. The high-selectivity Hg<2+> color indicator based on the Rhodamine B thiohydrazine derivative can be used for quickly analyzing the content of appointed Hg<2+> in a water sample; the high-selectivity color indicator has high anti-interference capability to other metal ions, a suitable pH range is from weak acidity to neutrality; the high-selectivity Hg<2+> color indicator has the advantages of simple synthesis process, low cost, simpleness and convenience in operation, good selectivity, high sensitivity, high response speed, low limit of detection, wide application prospect and the like, and can be applied to real-time and quick measurement of complex samples.

The invention discloses a preparation method, a product and application of a Te nanomaterial with controllable morphology, and relates to the technical field of preparation of Te materials. The preparation method comprises the following steps: adding polyvinylpyrrolidone, an alkaline solution and hydrazine monohydrate into an aqueous sodium tellurite solution, and carrying out a hydrothermal reaction to obtain the morphology-controllable Te nanomaterial. When the average molecular weight of the polyvinylpyrrolidone is 8000, the morphology of the prepared Te nanomaterial is in a two-dimensional sheet shape; and when the average molecular weight of the polyvinylpyrrolidone is 360000 or 1300000, the morphology of the prepared Te nanomaterial is in a one-dimensional linear shape. By changing the average molecular weight of PVP, the growth speed of each crystal face of a Te material can be different, so the Te nanomaterial with a two-dimensional sheet shape and a small aspect ratio or with a one-dimensional linear shape and a large aspect ratio is respectively prepared.

The invention relates to a manufacturing method of a floor with a high antibacterial performance. The manufacturing method of the floor with the high antibacterial performance belongs to the technicalfield of building materials and comprises the following steps of immersion treatment, microwave treatment and hot pressing treatment. A preparation method of a nano silver water solution comprises the following steps of adding a sodium dodecyl sulfate solution into a silver nitrate solution to obtain a mixed liquid, wherein the molar ratio of sodium dodecyl sulfate to silver nitrate is 2:1; adopting nano silver as a solute, dissolving the nano silver into deionized water; and adopting an acrylic resin as a complexing agent and a stabilizer, dissolving the acrylic resin into the deionized water, and then adding a dispersing agent and a reducing agent at the same time so as to form a solution, wherein the dispersing agent is triethanolamine, the mass content of the triethanolamine in the solution is 1 to 3 percent, the first reducing agent is a hydrazine monohydrate water solution, and the content of the hydrazine monohydrate water solution in the solution is 0.2 to 0.4 percent. Compared with a traditional manufacturing method of the floor, according to the manufacturing method of the floor with the high antibacterial performance provided by the invention, the floor is poorer in wear resistance and high in performance cost ratio, bacteria and mildews cannot easily breed on the floor and a glue spraying part, the attractiveness and the use performance of the floor are ensured, and the antibacterial performance of the composite floor is improved.

The invention discloses a preparing method of a TiO2/MoS2 ultra-thin nanosheet array composite. The method includes the steps of S1, conducting ultrasonic processing on a molybdenum net in an acetonesolution, an ethanol solution, a hydrochloric acid solution and high-purity water sequentially, taking out the molybdenum net, and drying the molybdenum net in a vacuum drying box; S2, adding ammoniumtetrathiomolybdate, N,N-dimethylformamide and hydrazine monohydrate into a reaction still to be stirred; S3, putting the molybdenum net into the reaction still, screwing down the reaction still, putting the reaction still into an oven, and conducting hydrothermal reaction for 15 hours at 200 DEG C; S4, conducting cooling until the room temperature is reached, taking out the molybdenum net, ultrasonically washing the molybdenum net with distilled water and absolute ethyl alcohol sequentially, drying the molybdenum net in the drying box at 65 DEG C, and depositing TiO2 on an atom layer of the obtained molybdenum net to obtain the TiO2/MoS2 ultra-thin nanosheet array composite. The preparing method is rich in raw material source, green in synthesis route and high in repeatability; the composite can be used for electro-catalytically reducing CO2, is high in catalytic activity and easy to operate and has high application value and practical value and broad development prospects.

The invention discloses a chemical plating solution for a ZrO2 oxygen sensor electrode and a preparation method and application of the chemical plating solution. The chemical plating solution comprises main salt, a reducing agent and a complexing agent, and the reducing agent comprises sodium borohydride and one or two of isonicotinic acid hydrazide or hydrazine monohydrate. The invention also provides a method for chemically plating a ZrO2 oxygen sensor electrode by using the chemical plating solution. Through the combined action of various reducing agents in the chemical plating solution, the chemical plating time is shortened, the efficiency is improved, and meanwhile, a chemical plating layer is uniform, so that the electrode performance can be ensured under the condition of low thickness, the use of a large amount of platinum is reduced, and the cost is reduced. Meanwhile, the invention further designs a protection device at the position except the position needing to be plated in the chemical plating process, and it is guaranteed that the electrode area of the plated ceramic part is controllable.

The invention discloses a solvothermal preparation method of regular-octahedral calcium sulfide particles. The solvothermal preparation method comprises that regular-octahedral CaS particles with uniform sizes are prepared from sublimed sulfur as a sulfur source, calcium chloride as a calcium source, ethylenediamine as a reaction solvent, L-cysteine and ethylenediaminetetraacetic acid (EDTA) as chelating agents and a hydrazine monohydrate as a reductant through a solvothermal method. Through change of concentrations of the chelating agents and reductant in a reactor, Ca<2+> and S<2-> release rates are controlled so that the dissolution-recrystallization rate of the CaS particles is controlled. Through adjusting reaction time, CaS spherical particles are recrystallized to form regular-octahedral particles. The solvothermal preparation method has the characteristics of simple operation, mild conditions, safety and environmental friendliness, is suitable for large-scale production and hasa wide industrial prospect.

The invention relates to a method for preparing tellurium nanocrystals. The conventional method cannot effectively control the morphologies of the tellurium nanocrystals. The method comprises the following steps of: preparing aqueous solution of tellurium acid according to the morphology required by the prepared tellurium nanocrystals; adding a reducing agent hydrazine monohydrate into the aqueous solution of the tellurium acid to form black suspension solution, and pouring into a hydrothermal reactor for hydrothermal reaction at the temperature of between 100 and 120 DEG C for 12 to 24 hours; and centrifuging to separate the reaction products, and washing and drying the solid product to obtain the tellurium nanocrystals. The morphologies of the tellurium nanocrystals can be controlled bychanging the concentration of the aqueous solution of tellurium acid in the reaction system, so the nanocrystals in different morphologies such as nanoparticles, short nanorods and long nanorods can be respectively obtained. The method has the advantages of simple process and stable reaction system; and the obtained tellurium nanocrystals have better uniformity and the morphologies of the obtained tellurium nanocrystals can be effectively controlled.

A method for synthesizing 2-(2-aminoethoxy) ethanol, including the steps of producing 2-(2-phthalimidoethoxy) ethanol by reacting 5-tosyloxy-3-oxapentanol with potassium phthalate and converting the 2-(2-phthalimidoethoxy) ethanol to the 2-(2-aminoethoxy) ethanol by reacting the 2-(2-phthalimidoethoxy) ethanol with hydrazine monohydrate. Reacting the 2-(2-phthalimidoethoxy) ethanol with the hydrazine monohydrate may include forming a final mixture by adding the hydrazine monohydrate to a solution of 2-(2-phthalimidoethoxy) ethanol, refluxing the final mixture in a nitrogen atmosphere, extracting a second organic phase containing the 2-(2-aminoethoxy) ethanol from the final mixture using a second portion of chloroform, and purifying the 2-(2-aminoethoxy) ethanol from the second organic phase.

The invention relates to the technical field of organic synthesis, and discloses an asymmetric phosphorus oxide pyridine triazine derivative and a synthesis method thereof.The asymmetric phosphorus oxide pyridine triazine derivative has the structural formula shown in the formula I. The synthesis method comprises the steps that 1, halogenated-2-cyanopyridine and hydrazine monohydrate react to obtain an intermediate product A; step 2, dropwise adding the intermediate product A into a camphorquinone solution, carrying out a reaction to obtain a filtrate, carrying out spin-drying, and purifying to obtain an intermediate product B; and 3, dissolving the intermediate product B and phosphorus oxide in a solution, and reacting to obtain the derivative, the derivative has the advantages of stable performance, strong acid hydrolysis resistance, high extraction capacity, high extraction rate and the like, and has a good application prospect in the field of co-extraction separation of trivalent lanthanide series and actinide series in nuclear industry waste liquid, especially high-level liquid waste.