60 results about "Iron pentacarbonyl" patented technology

The new method for preparing high crystallinity monodisperse water-soluble magnetic nano microparticles is characterized by that it selects the inorganic iron salts of anhydrous iron trichloride and iron chloride, etc. or metal organic iron compounds (such as iron pentacarbonyl, iron triacetylacetonate, iron biacetylacetonate, complex of cupferron and iron salt, iron octoate and ferric oxalate, etc.) as iron raw material, and utilizes high-temp. decomposition of them in high boiling point polar solvent (for example alpha-pyrrolidone and its derivatives (N-methyl-2-pyrrolidone and N-ethyl-2-pyrrolidone, etc.), N,N-dimethyl-2-imidazolone, hexametapol, gamma-butyrolactone and its derivative and low molecular weight (molecular weight M is less than or equal to 5000) polyglycol and its derivatives) to prepare magnetic nano microparticles. Said invention can adopts different iron raw materials and high boiling point polar solvents so as to obtain different types of magnetic nano microparticles (Fe, Fe2O3 and Fe3O4) with different sizes and crystallinities and different crystal structures.

The invention relates to ceramic with a three-dimensional decoration effect and a preparation method thereof. A distributor is firstly utilized to distribute powder into a pattern corresponding to an ink-jetted pattern on the surface; a body is then formed by pressing; the surface of the body is then covered by a layer of overglaze paste with coloring auxiliary after drying, and permeating ink is then jetted after the body is dried again; the body is then fired, and thereby the ceramic is produced; in a ceramic tile, the permeation depth of the permeating ink in the overglaze layer is 0.2mm to 0.5mm; the permeating ink is oil-based ink containing a transitional metal complex, wherein the transitional metal complex comprises nickel carbonyl, iron pentacarbonyl, chromium hexacarbonyl, titanium hexacarbonyl, dicobalt octacarbonyl, titanium(IV)-oxy acetylacetonate, vanadium(IV)-oxy acetylacetonate, chromium acetylacetonate, cobalt acetylacetonate, praseodymium acetylacetonate and iron acetylacetonate. An oil-based system is adopted as the ink, a high-permeability organic solvent with small molecular volume and low surface tension is adopted as a permeation promoter to replace water, and the osmotic gradient of coloring salt is small.

The invention discloses a method for preparing magnetic iron oxide nano particles. The method comprises the following steps of: dissolving iron pentacarbonyl and a modifier into a solvent, atomizing by virtue of an ultrasonic atomizer, loading a solution into a heater by virtue of a carrier gas, carrying out gasification, decomposition and oxidation, introducing products into collected fluid, mixing, stirring, and carry outing surface reaction to obtain modified magnetic iron oxide nano particles. The modifier used in atomized liquid and the collection fluid is selected from oleic acid or oleic amine, triethylene glycol, polyethylene glycol PEG and derivates thereof, glucosan, citric acid, tetramethylammonium hydroxide, carboxylic acid polyethylene glycol and derivates thereof, polyvinylpyrrolidone (PVP) and dimercapto succinic acid or a mixture of the substances; the carrier gas is a mixed gas of oxygen gas and argon gas, and the heating process is carried out in two stages. By applying the method disclosed by the invention, the magnetic iron oxide nano particles with uniform particle sizes can be prepared while the advantages of speediness, high efficiency, continuous production and low pollution are achieved; and the prepared iron oxide nano particles can be used in the fields such as biology, medicine, catalysis and mechanical lubrication.

The present invention discloses one kind of nanometer iron catalyst and its preparation process and apparatus. The nanometer iron catalyst is prepared through the following steps: adding liquid iron pentacarbonyl; heating iron pentacarbonyl in a reactor for the iron pentacarbonyl to infiltrate into the pores of catalyst carrier; further heating or introducing high temperature pressurized high purity nitrogen or other inert gas to decompose iron pentacarbonyl to obtain nanometer level iron particle; cooling, filling the prepared nanometer iron catalyst into package filled with high purity nitrogen and sealing for preserving. The present invention utilizes solid carrier to block the aggregation of iron particle for obtain nanometer iron particle. The nanometer iron catalyst has high activity, high dispersivity, high stability and simple preparation process, and is suitable for industrial production.

A preparation method of an iron-coated graphene nanocomposite material comprises the following steps: (1) conducting thermal-expansion stripping on graphite oxide under a high temperature to obtain multi-layer graphene; (2) putting the multi-layer graphene and an organic solvent into a four-mouth flask, and mechanically stirring and mixing uniformly; (3) introducing pentacarbonyl iron steam into the mixed solution for thermal decomposition under a continuously stirring protection atmosphere; (4) conducting the thermal decomposition in a reflux condensation process; and (5) after the reaction,cooling to room temperature under the nitrogen protection, separating a product by a magnet, then cleaning the product by adopting an organic solvent, and drying the product under the nitrogen protection to obtain the iron-coated graphene nanocomposite material. According to the preparation method, Fe nanoparticles with a size of 20-50nm can be coated on the graphene sheet layers uniformly, the process is simple and controllable, the cost is low, and the industrial production is facilitated.

The invention discloses a manufacture method for high capacity magnetic powder core using superfine carbonyl iron dust that includes the following steps: compounding pure CO and iron raw material in compounding kettle under 3-15MPa pressure and 100-200 degree centigrade to gain iron pentacarbonyl, after taking condensation, gas liquid separation, the liquid iron pentacarbonyl would be sent into tank; pouring iron pentacarbonyl, nickel carbonyl, nitrogen gas, and alkaline air into decomposition furnace, controlling the temperature between 180 and 350 degree centigrade to gain superfine carbonyl iron dust with special electromagnetic property. The invention has the feature of short flow, low energy consumption. The product has wide application field, and high product additional value.

The invention discloses a method for synthesizing iron amino acid chelates (II) by utilizing carbonyl iron, which is mainly applied to the industries of foodstuff, feed additives and health-care products. According to the method, iron pentacarbonyl and an amino acid water solution which are used as reactors react in inert gas under the condition of moderate reaction to prepare the iron amino acid chelates (II). The synthesized iron amino acid chelates (II) do not contain other inorganic acid radical ions, the product yield is greater than 90%, ferrum in the synthesized iron amino acid chelates is in the divalent state, and the ferrum content is greater than 16%.

There is a preparation process of the metamaterial with a negative index of refraction, especially the lefthanded composite system (ceramic) built from iron and boron nitride Fe:BN with a negative refractive index associated with negative values of the magnetic −μ and dielectric −£ permeability. Method of preparation of the Fe:BN ceramic includes mixing Fe nano or micro particles (synthesized from iron pentacarbonyl Fe(CO)s) with hexagonal boron nitride (h-BN), grinding the powders, compacting the powder in form of pellets at room temperature and low pressure, placing a pellet in a container (CaCO3) with graphite heater, and sintering the pellet from ambient pressure to 8 GPa and temperature from room temperature to 2000 degrees C. The iron or iron based powder particles are evenly distributed in h-BN media and form core-shell structure, where the core includes iron or iron based particles and the shell includes an h-BN layer.

The present invention provides a method for forming nano-structured iron oxide coatings on a substrate. The method includes the steps of: (a) subjecting a chamber containing a plasma source to vacuum; (b) feeding iron pentacarbonyl and O₂ into a chamber containing a plasma source, wherein the O₂ is fed into the chamber at a rate greater than that of the iron pentacarbonyl; (c) subjecting the substrate to the chamber, wherein the substrate is at a temperature less than 250° C., thereby forming an iron oxide coating on the substrate, wherein the iron oxide is greater than 90 percent in the α-hematite form.

The invention discloses a method for synthesizing an iron pentacarbonyl under the condition of middle pressure which takes the substance containing iron as the reaction material, carbon monoxide as a reaction gas and the sulfur compounds as a catalyst. Under the operation temperature of 120-250 DEG C and the reaction pressure of 3.0-8.5MPa, the conversion rate of the iron is up to more than 86 percent. The invention shortens the reaction time and reduces the carbonylation pressure.

The invention belongs to the technical field of electrocatalytic decomposition of water, and discloses an FeS nanoparticle synthesized based on a solvothermal method, and a preparation method and an application thereof. Sulfur powder is added into pentacarbonyl iron, an organic solvent is added to dissolve and mix the sulfur powder and the pentacarbonyl iron, and the obtained mixture is stirred atroom temperature; the mixture is transferred into a stainless steel high-pressure reaction kettle, the reaction kettle is put into an oven, and a temperature is kept for a period of time, and then isreduced; and after the reaction kettle is cooled to room temperature, the obtained mixture is centrifugally washed to obtain a black precipitate, and the black precipitate is ultrasonically treated and washed with alcohol and ketone for multiple times, and finally is centrifugally collected to obtain the nanoparticles. The FeS nanocrystal with the advantages of adjustable morphology and size, good conductivity and high electrocatalytic performance is prepared on the nanoscal by taking the organic solvent as a solvent and adjusting the ratio of the raw materials through a chemical method, thee, and plays a wide role in the emerging fields such as energy sanitation and ecological civilization.

Iron- and copper-comprising heterogeneous catalyst and process for producing it, which comprises the following steps:

• • I. thermal decomposition of gaseous iron pentacarbonyl to give carbonyl iron powder having spherical primary particles,
  • II. treatment of carbonyl iron powder obtained in step I with hydrogen, resulting in the metallic spherical primary particles at least partly agglomerating,
  • III. surface oxidation of the iron particles from step II (agglomerates=secondary particles, and also any primary particles still present) to form iron oxide,
  • IV. contacting of the particles from step III with an aqueous solution of a copper compound,
  • V. drying in the presence of oxygen and subsequent calcination in the absence of oxygen, resulting firstly in oxygen-comprising copper compounds on the particles and finally reaction of these with the iron oxide to form a mixed oxide of the formula Cu_xFe_3-xO₄, where 0<x≦1.

Process for preparing olefins by reacting carbon monoxide with hydrogen in the presence of a catalyst, wherein the abovementioned iron- and copper-comprising heterogeneous catalyst is used as catalyst.

The invention provides a method and system for utilizing copper tailings comprehensively. The method for utilizing the copper tailings comprehensively comprises the steps of mixing and pre-treating the copper tailings, reducing agents, adding agents and binders for obtaining material pellets conveniently; roasting the material pellets at high temperature for obtaining roasted products and zinc oxide dust conveniently; carrying out ore grinding and magnetic separation on the roasted products for obtaining copper-bearing iron powder; enabling the copper-bearing iron powder and carbon monoxide to react for obtaining gaseous pentacarbonyl iron and solid slag; depressurizing and cooling a synthesis gas reaction unit and converting the gaseous pentacarbonyl iron into liquid pentacarbonyl iron for obtaining solid-liquid mixtures conveniently; carrying out solid-liquid separation on the solid-liquid mixtures for obtaining the liquid pentacarbonyl iron and solid tailings; gasifying and resolving the liquid pentacarbonyl iron for obtaining metal iron powder and the carbon monoxide; carrying out fine grinding and flotation treatment on the solid tailings for obtaining copper concentrate and tailings. Through the method, zinc, copper and iron in the copper tailings can be effectively separated.

The invention discloses a preparation method of a PtVFe/WC/C nano-composite oxygen reduction catalyst. A PtVFe solution was previously prepared in a laboratory. The preparation method comprises the following steps of first, adding 140mg of mixture of tungsten carbide and carbon powder in 200mL of hexane, performing supersonic treatment for 2 hours, and then adding prepared 60mg of PtVFe solution (platinum source, vanadium source, and iron source are platinum 2,4-pentanedionate, vanadium(III)-2,4-pentanedionate and iron pentacarbonyl) so as to prepare a PtVFe/WC/C mixed solution; second, performing supersonic treatment on the mixed solution for 1 hour, then stirring for 16 hours; third, stirring for 4-8 hours under protection of nitrogen (N2) so as to evaporate suspension slowly; fourth, collecting and drying an evaporated product under protection of N2 so as to obtain PtVFe/WC/C powder; fifth, performing thermal treatment on the PtVFe/WC/C powder for 60 minutes under protection of N2, wherein the temperature is 260 DEG C; and sixth, calcining the thermal treated PtVFe/WC/C powder for 120 minutes at 400 DEG C under protection of 15% of H2 and 85% of N2, so as to obtain the PtVFe/WC/C nano-composite oxygen reduction catalyst. The PtVFe/WC/C oxygen reduction catalyst prepared by the method has better electrochemical activity and stability, not only improves the cathode reaction efficiency, but also prolongs the cycle life of the cathode.

The invention discloses a method for removing sulfureted hydrogen from mixture containing metal carbonyl (nickel carbonyl or iron carbonyl). The method includes that the catalyst is loaded in a fixed bed reactor; at the temperature of 5-250 DEG C, the CO mixed gas containing the nickel carbonyl or the iron carbonyl is added to the fixed bed reactor; under the air speed of 800-4000h-1, the sulfureted hydrogen in the mixed gas can be removed to below 0.1ppm.

A method of manufacturing a magnetite-coated iron powder includes putting an iron powder into a reaction liquid containing iron pentacarbonyl and heating the same in an oxidizing atmosphere, or includes heating a reaction liquid containing iron pentacarbonyl in a reducing atmosphere thereby precipitating iron particles and heating the reaction liquid in which iron particles are precipitated in an oxidizing atmosphere and coating magnetite to the precipitate iron particles.

The present invention relates to a kind of methanol gasoline and its preparation method. Isopropyl ether, benzene or toluene or xylene, iron naphthenate or iron pentacarbonyl, silicon aluminum phosphate or sodium dihydrogen phosphate, RP97 composite detergent and dispersant, carboxylate or sulfonate, silicon-type molecular sieve. The preparation must be carried out under normal temperature, normal pressure, non-spark, fireproof and explosion-proof environment. The steps are as follows: add isobutanol or isopropanol to benzene or toluene or xylene, and then add diisopropyl alcohol together Synthesize co-solution A in ether; add gasoline or light hydrocarbon or straight-run oil into methanol, and mix to form main solution B; mix and stir solution A and solution B to form solution C; then add other additives in turn, and stir evenly; Just filter. It has the advantages of low cost, high octane number, good stability, storage period of more than one year, and environmental protection. The preparation process is simple, and products of various labels can be prepared.

Iron- and manganese-containing heterogeneous catalyst, and a process for producing it, including the following steps: thermal decomposition of gaseous iron pentacarbonyl to give carbonyl iron powder having spherical primary particles; treatment of carbonyl iron powder with hydrogen, resulting in the metallic spherical primary particles at least partly agglomerating; surface oxidation of the iron particles to form iron oxide; contacting the particles with an aqueous solution of a manganese compound; drying in the presence of oxygen and subsequent calcination in the absence of oxygen, resulting in oxygen-comprising manganese compounds on the particles; and finally reaction of these with the iron oxide to form a mixed oxide of the formula Mn_xFe_3-xO₄, where 0<x≦2. Process for preparing olefins by reacting carbon monoxide with hydrogen in the presence of a catalyst, wherein the abovementioned iron- and manganese-comprising heterogeneous catalyst is used as catalyst.

The invention is concerned with preparing zinc sulfide single-crystal film with iron by low-pressure metal organic chemistry gaseous phase sediment equipment. That is: puts the cleaning semiconductor underlay on the graphite base of the growth room, controls the pressure of the growth room at low, passes over the high-pure hydrogen in the growth room, adjusts high frequency high frequency to heat the graphite base, disposals the underlay 10 minutes -20 minutes at 600 centigrade, uses the cold-trap equipment to control the temperature source of the zinc ethyl and iron pentacarbonyl at the needing value in order to reduces the temperature of the underlay at the best growth temperature, passes over the certain flux hydrogen sulfide (H2S)gas source taking by the high pure hydrogen, iron pentacarbonyl (Fe(CO)5) and zinc dimethyl (DMZn) to the growth room, namely completes the ZnFeS film growth at the condition of low pressure. The invention can get single orientation six-side and four-side ZnFeS single-crystal film with high Fe group.

Iron—comprising heterogeneous catalyst and a process for producing it, which comprises the following steps:

I. thermal decomposition of gaseous iron pentacarbonyl to give carbonyl iron powder having spherical primary particles,

II. treatment of carbonyl iron powder obtained in step I with hydrogen, resulting in the metallic spherical primary particles at least partially agglomerating,

III. contacting of the agglomerates (=secondary particles) with iron pentacarbonyl,

IV. thermal decomposition of the iron pentacarbonyl applied in step III to give at least predominantly pore- and void-free secondary particles.

Process for preparing olefins by reaction of carbon monoxide with hydrogen in the presence of a catalyst, with the abovementioned iron-comprising heterogeneous catalyst being used as catalyst.

The present invention provides a method for producing nano-sized Fe powder having a polymer coated layer on a surface thereof, so as to prevent the nano-sized Fe powder from being oxidized under atmosphere. The method includes: gasifying an iron pentacarbonyl (Fe(CO)₅) or an iron acetate ((CH₃CO₂)₂Fe) precursor in a ceramic bubbler; forming nano-sized Fe particles due to the crystallization of Fe gas while mixing the gasified precursor with Ar gas in a reactor; and precipitating the nano-sized Fe particles in a polymer solution in a chamber, before the nano-sized Fe particles are oxidized. According to this technique, Fe powder on the order of tens of nms in size, and having a polymer coated layer, are obtained from the Fe precursor. A system for producing the nano-sized Fe powder is also disclosed.

The invention belongs to the technical field of electrocatalytic decomposition of water, and discloses a preparation method and application of nickel-doped pyrrhotite FeS nanoparticles. The compound is synthesized by adopting a one-pot method and is applied to the field of electrocatalytic decomposition of water. The preparation method comprises the following steps: dissolving pentacarbonyl iron,sublimed sulfur powder and nickel acetate in a certain amount of organic solvent under the protection of nitrogen, stirring at room temperature for a period of time to fully dissolve pentacarbonyl iron, sublimed sulfur powder and nickel acetate, transferring the solution into a stainless steel high-pressure reaction kettle, putting the reaction kettle into a drying oven, keeping the temperature for a period of time, and cooling; after the reaction kettle is cooled to room temperature, carrying out centrifugal operation on the reaction solution to obtain a black precipitate, carrying out ultrasonic treatment on the obtained black precipitate, and washing the black precipitate with absolute ethyl alcohol and water for multiple times; performing centrifugal collection; and finally, performingvacuum freeze drying to obtain the nickel-doped pyrrhotite FeS nano-catalyst. The required raw materials are cheap and easy to obtain, the preparation method is simple, the cost is low, and the method is expected to play an important role in wider emerging fields.

The invention discloses a preparation method of a WS2/FeS nanosphere hybrid catalyst, which comprises the following steps: S101, dissolving tungsten hexacarbonyl and sulfur powder in an organic solvent under the protection of inert gas, uniformly mixing, dropwisely adding a certain amount of iron pentacarbonyl, and uniformly mixing at room temperature to obtain a brown mixed solution; S102, fullyreacting the brown mixed solution in a high-pressure reaction kettle at the temperature of 100 DEG C and 250 DEG C to obtain a mixture; preferably, the brown mixed solution is fully reacted for 10-24hours; and S103, cooling the reacted high-pressure reaction kettle to room temperature, centrifuging the mixture to obtain a black precipitate, and purifying the black precipitate to obtain the product. The invention provides the WS2/FeS nanosphere hybrid catalyst prepared by the method and an application of the WS2/FeS nanosphere hybrid catalyst. The preparation method of the WS2/FeS nanosphere hybrid catalyst is simple, and nanosheet cluster type nanoparticles with uniform size and high specific surface area are obtained.

The invention discloses a Pd/FeOOH@RGO Pickering emulsion and an application of the Pd/FeOOH@RGO Pickering emulsion in catalyzing a Suzuki carbon-carbon coupling reaction. Water and an organic solventare used as solvents at the same time; graphite oxide and a metal chloride are reduced with pentacarbonyl iron, no other reducing agent is added, Pd/FeOOH@RGO is prepared through a one-step reaction,then Pd/FeOOH@RGO is used as an emulsifier to stabilize a plurality of water-oil systems to form the Pickering emulsion. The Pickering emulsion prepared by the method is high in stability, is used for catalyzing Suzuki carbon-carbon coupling reaction of halogenated benzene and derivatives thereof; the catalytic reaction effect is excellent; recycling can be realized; the problems that a substrateof an organic chemical reaction system is poor in solubility in a water solution, low in catalyst activity, narrow in application range, difficult to separate and the like are effectively solved; theemulsion can meet requirements of the green and environment-friendly synthesis concept, and has huge application prospects in the field of catalysis.