31 results about "Atomic carbon" patented technology

The present invention provides a process for the manufacture of carbon nanostructures, the carbon nanostructures being selected from carbon nanotubes and carbon nano-onions. The method comprises the steps of injecting a carbon-containing gas into a plasma flame generated from a plasma forming gas to provide atomic carbon, which in the presence of in situ generated nanometer sized metal catalyst particles that act as nucleation points for growth of carbon nanostructures, produce the carbon nanostructures, and collecting the carbon nanostructures.

A process of forming an image includes the steps of: developing an electrostatic latent image with a toner, the latent image being formed through charge of the surface of an electrostatic latent image carrier and exposure of the surface to light; and applying a lubricant onto the surface of the electrostatic latent image carrier. The toner includes a toner matrix particle and an external additive nanoparticle. The external additive nanoparticle comprises a silica-polymer composite nanoparticle. A percentage of atomic silicon present on the surface of the silica-polymer composite nanoparticle satisfies Condition A expressed by Expression: 15.0 atm %≦percentage of atomic silicon ({Si / (C+O+Si)}×100)≦30.0 atm %. The percentage of atomic silicon is determined from total amounts of atomic carbon, oxygen, and silicon present on the topmost surface of the silica-polymer composite nanoparticle and within 3 nm inwards from the topmost surface.

An atomic carbon material and a preparation method thereof having ion adsorption ability superior to fullerenes and nano-tubes are provided. This atomic carbon material is in a state existing as an organic compound and in a state close to an atom with a diameter of 1 nm or less (theoretically about 1.66 angstrom), and is a bulk where they are congregated with each other with an interatomic force or a particle with a particle size of 1 nm or less. This atomic carbon material is manufactured by heating a raw material composed of an organic material which does not include carbon units in an inactive atmosphere at a predetermined temperature while sequentially increasing the temperature and by individually separating expected elements except for carbon in the aforementioned atmosphere and the organic material from being bonded with carbon by thermally decomposing in order from an element having a lower decomposition temperature at a temperature of 450 C or lower.

The invention discloses a universal method and application for preparing a metal single-atom carbon-based catalyst, comprising the following steps: using a metal compound as a single-atom precursor, Ketjen black as a carbon skeleton, glucose as a binder, and dicyandiamide as a source of nitrogen. By means of ultrasonic dispersion step by step, all raw materials are mixed evenly, then dried and ground, annealed and cracked at high temperature, so that the metal presents a single atom distribution. The invention uses the prepared metal monoatomic carbon-based catalyst to form a Fenton-like system to degrade tetracycline-containing sewage, and has high removal efficiency. Taking the copper single-atom carbon-based catalyst as an example, 0.1g / L catalyst activated 0.18mM persulfate can completely remove 10mg / L tetracycline (20mL) in 1min, and the kinetic constant of the first order reaction is 4.9min ‑1 .

The invention relates to a MnAlC-based high coercive force permanent magnetic material and a preparation method thereof. The preparation method comprises the following steps of proportioning raw materials and preparing a master alloy; crushing a master alloy ingot obtained after smelting, cleaning surface impurities and carrying out drying treatment to obtain a crushing block alloy; placing the obtained crushing block alloy into a quartz tube, carrying out melting treatment under the vacuum condition and the protective atmosphere, and preparing an alloy ribbon through the alloy in the molten state; carrying out heat treatment on the alloy ribbon; and lastly, carrying out ball-milling treatment on the treated alloy ribbon under the action of a surfactant to obtain the MnAlC-based high coercive force permanent magnetic material. In comparison with the prior art, the small-radius atomic carbon is introduced for stabilizing a magnetic phase by means of element doping control, the boundary of a magnetic domain is pinned by the transition metals, a balance between the magnetic performance and the price is sought without using the rare earth element; the surfactant is introduced to assist ball milling, so that the coercive force of the material is greatly improved.

A coating includes a zirconium yttrium carbon-nitride layer including a first surface and an opposite second surface, the atomic carbon content and the atomic nitrogen content in the zirconium yttrium carbon-nitride layer gradually increasing from the first surface to the second surface.

A coating includes a titanium aluminum silicon carbon-nitride layer including a first surface and an opposite second surface. The atomic carbon content and / or the atomic nitrogen content in the titanium aluminum silicon carbon-nitride layer gradually increases from the first surface to the second surface.

The invention discloses a method for modifying a PVC (Polyvinyl Chloride) resin in advance, which comprises the following steps of: mixing PVC (Polyvinyl Chloride) resin powder or granules with a structural modifying agent and an addition agent under a stirring condition, and reacting for 0.1-72 hours in the temperature of 5-120 DEG C, wherein the structural modifying agent is selected from alkane with 1-6 atomic carbons, halogenated methane, halogenated ethane, halogenated propane, carbon dioxide, dimethyl ether, aliphatic alcohol with 1-4 atomic carbons and ketone with 3-5 atomic carbons; the addition agent is selected from fatty acid salt, alkyl group sulfate, alkyl sulfonate, alkylbenzene sulfonate, tetra alkyl halogenated ammonium, tetra alkyl ammonium hydroxide, a betaine ampholyticactive agent and a segmented copolymer of epoxy ethane and propylene oxide. The invention also discloses modified PVC (Polyvinyl Chloride) obtained by using the method, the application of PVC (Polyvinyl Chloride), a method for preparing modified PVC (Polyvinyl Chloride) by using the modified PVC (Polyvinyl Chloride) and the modified PVC (Polyvinyl Chloride) obtained therefrom. According to the invention, a aggregative state structure of a macromolecule chain inside the PVC (Polyvinyl Chloride) powder is changed by adopting a specific method so that the PVC (Polyvinyl Chloride) powder can be conveniently used for subsequent chemical modification or subsequent molding processing.

The invention discloses a heteroatom-containing carbon material, its preparation method and application, and a hydrocarbon oxidative dehydrogenation method. The heteroatom-containing carbon material contains oxygen, nitrogen, hydrogen and carbon elements. The heteroatom-containing carbon material has X In the ray diffraction pattern, there are diffuse peaks between 20°-30° and 40°-50° at the 2θ angle, and the surface oxygen content determined by X-ray photoelectron spectroscopy is a, determined by elemental analysis The content of bulk oxygen is b, a / b≥2. As a catalyst for the oxidative dehydrogenation reaction of hydrocarbons, the heteroatom-containing carbon material can obtain significantly improved olefin selectivity, reduce the amount of raw materials for ineffective combustion, and improve raw material utilization and reaction safety. Also, the heteroatom-containing carbon material according to the present invention is low in cost and easy to obtain.

The invention discloses a carbon material containing metal atoms, its preparation method and application, and a method for oxidative dehydrogenation of hydrocarbons. The carbon material containing metal atoms contains oxygen, hydrogen, carbon, metal and optional nitrogen. In the metal atom carbon material, the content of surface oxygen determined by X-ray photoelectron spectroscopy is a, the content of bulk oxygen determined by elemental analysis is b, and a / b≥2. As a catalyst for the oxidative dehydrogenation reaction of hydrocarbons, the metal atom-containing carbon material can obtain significantly improved olefin selectivity, reduce the amount of raw materials for ineffective combustion, and improve raw material utilization and reaction safety. Also, the metal atom-containing carbon material according to the present invention is low in cost and easy to obtain.

The application discloses a method for preparing organic ketones. The raw material gas passes through a reactor carrying an acidic molecular sieve catalyst to react to obtain organic ketones; the raw material gas includes reaction raw materials; the reaction raw materials are selected from At least one of the compounds of the shown structural formula; wherein, R 1 from C 1 ~C 10 One of the hydrocarbon groups; R 2 Choose from H, C 1 ~C 10 One of the hydrocarbon groups. In formula I, the carbonyl ortho-carbon contains α-hydrogen atoms. Compared with traditional elemental / supported metal catalysts, the method for preparing ketone organics provided by the invention has the advantages of high reactivity, easy availability of raw materials, simple preparation process, etc., and has good industrial application prospects.

The invention belongs to the field of materials, and relates to a method for preparing elemental materials by reducing single-atom carbon. The method includes: in the melt medium, at 300°C to 1500°C, the organic carbon source is cracked into atomic carbon and dissolved in the melt medium, and the atomic carbon is oxidized with the elemental precursor compound placed in the melt medium In the reduction reaction, the precursor compound is reduced to an element, and the element is supersaturated and crystallized in the melt medium to obtain an element material. The method of the invention can prepare high-quality, self-crystallized single substance materials at a lower temperature and at a lower cost.

A process for treating a hydrocarbon-containing feedstock is provided in which a hydrocarbon-containing feed comprising at least 20 wt. % of heavy hydrocarbons is mixed with hydrogen and at least one catalyst to produce a hydrocarbon-containing product. The hydrocarbon-containing feedstock, the catalyst(s), and the hydrogen are provided to a mixing zone and blended in the mixing zone at a temperature of from 375° C. to 500° C. A vapor comprised of hydrocarbons that are vaporizable at the temperature and pressure within the mixing zone is separated from the mixing zone, and, apart from the mixing zone, the vapor is condensed to produce a liquid hydrocarbon-containing product containing at least 85% of the atomic carbon initially present in the hydrocarbon-containing feedstock and containing at most 2 wt. % hydrocarbons having a boiling point of at least 538° C.