50 results about "Carbon–oxygen bond" patented technology

The invention relates to a preparation method of a linear-chain C5/C6 alkane catalyst prepared by sorbitol aqueous phase hydrogenation. The method comprises the following steps: (1) selecting activated carbon as a catalyst carrier, and drying at the temperature of 100-200 DEG C; (2) adding the dried activated carbon into an ammonium paramolybdate aqueous solution, and drying to obtain a catalyst carrier precursor containing molybdenum; (3) calcining the catalyst carrier precursor containing molybdenum in a muffle furnace to obtain a catalyst carrier containing molybdenum; (4) adding a ruthenium trichloride solution into the catalyst carrier for soaking, and drying to obtain a catalyst carrier precursor containing ruthenium and molybdenum; (5) calcining the catalyst carrier precursor containing ruthenium and molybdenum to obtain an initial catalyst; and (6) performing hydrogen gas reduction on the initial catalyst at the temperature of 250-400 DEG C for 4-8h to obtain the sorbitol aqueous phase hydrogenation catalyst. According to the method, a step soaking method is adopted to inhibit carbon-carbon bond breakage and selectively break carbon-oxygen bonds, so that the selectivity and the excitation capacity of sorbitol hydrodeoxygenation reaction can be improved.

A novel ligand conjugate which is effectively utilizable for analyzing a function of a protein; a ligand-supporting object; and a method of analyzing a protein. The ligand conjugate has a structure which comprises: a linker compound having a structure represented by the following General Formula (1):

(wherein n and p each is an integer of 0 to 6) in which X is a structure comprising one, two, or three hydrocarbon derivative chains which have an aromatic amino group at the end and may have a carbon-nitrogen bond in the main chain, Y is a hydro-carbon structure containing one or more sulfur atoms, and Z is a straight-chain structure comprising a carbon-carbon bond or carbon-oxygen bond; and a sugar which has a reducing end and is bonded to the linker compound through the aromatic amino group.

The present invention relates to an arc-extinguishing insulation material molded product provided in the vicinity of a contact point between contactors in a gas circuit breaker. The arc-extinguishing insulation material molded product includes a polymer which contains a carbon-oxygen bond in the main chain, and in which a part of or all of terminal atoms are non-hydrogen atoms.

To provide a method of producing a polyoxyalkylene-modified polysiloxane composition that is free of acid-mediated carbon-oxygen bond and silicon-oxygen bond cleavage, that is substantially deodorized and also does not generate odor with elapsed time, and that is therefore well suited for use in cosmetic applications, e.g., for hair cosmetics, skin cosmetics, and so forth. A production method of this invention is characterized by removing the odor-causing substance from a polyoxyalkylene-modified polysiloxane composition that has been synthesized by a hydrosilylation reaction, by subjecting the polyoxyalkylene-modified polysiloxane composition to a hydrolysis treatment in the presence of an acidic inorganic salt that is a solid at 25° C. and gives a specific pH at 25° C. in aqueous solution; for example, potassium hydrogensulfate.

The invention provides aminated graphene oxide preparing from graphene oxide having undergone surface hydroxyl activation and an ammonia source. According to the invention, the graphene oxide having undergone surface hydroxyl activation is used as a raw material, and the ammonia source is directly added for amination modification; and after a hydroxyl group on the surface of the graphene oxide isactivated, a carbon-oxygen bond becomes easy to break, so the lamellar structure of the graphite oxide can be well maintained and original characteristics can be reserved.

The invention provides a preparation method for aminated graphene oxide. The preparation method comprise a step of subjecting an activated graphene oxide solution, an ammonia source and an organic solvent to mixing and a reaction so as to obtain the aminated graphene oxide, wherein the activated graphene oxide comprises graphene oxide having undergone surface hydroxyl activation. According to theinvention, the graphene oxide having undergone surface hydroxyl activation is used as a raw material, and the ammonia source is directly added for amination modification; after a hydroxyl group on thesurface of the graphene oxide is activated, a carbon-oxygen bond becomes easy to break, so the desired temperature and time of amination are greatly reduced, and a modification reaction can be carried out under mild conditions at a low temperature; and thus, the lamellar structure of the graphite oxide can be well maintained and original characteristics can be reserved. Compared with a two-step-reaction amination process, the method of the invention has the following advantages: the surface-activated graphene oxide is directly utilized as the reaction raw material, so one step of reaction isomitted, and reaction time and energy consumption are reduced.

The invention provides a preparation method of alkyl borate. The preparation method comprises the following step: reacting by taking alkyl tosylate and bisdiboron shown as a formula I-a as raw materials under the action of a silver catalyst and alkali to obtain the alkyl borate shown as the formula I. According to the preparation method provided by the invention, commercially-available silver saltis directly adopted for participating into the reaction, a reaction system and a feeding mode are simple, and no ligand needs to be added. The used bisdiboron is insensitive to air and water and further is more convenient in actual application. The alkyl tosylate as the raw material can be conveniently prepared from alkyl alcohol and the raw material is wide in source; meanwhile, first-stage or second-stage alkyl borate is obtained by silver catalysis direct carbon-oxygen bond fission of the alkyl tosylate and the bisdiboron; the reaction has good functional group compatibility.

The invention relates to the field of lithium batteries, and discloses a boron-doped negative electrode material with good high temperature performance and a solid-phase preparation method thereof. Asa boron oxide compound is used as a dopant, the boron oxide compound is decomposed to generate boron oxide at high temperature directly through a solid-phase reaction, and the boron oxide is controlled to react with the surface of the negative electrode material. The structure of the material of the invention is characterized in that the composite structure of a boron-carbon bond and boron-carbon-oxygen bond and the like is formed on the surface of the negative electrode material from the original defect state. By surface modification, on the one hand, On the other hand, the surface defects of the negative electrode material can be reduced by the composite reaction of boron oxide and the surface of the negative electrode material, so that the specific surface area of the negative electrode material can be greatly reduced, and the side reaction of the negative electrode material with the electrolyte at high temperature can be reduced by the smaller specific surface area, and the high temperature performance can be obviously improved.

A system and method is described to convert ambient carbon dioxide (CO₂) to graphite and oxygen by splitting the carbon oxygen bonds. By using this process, CO₂ from point sources or from ambient air can be reduced or effectively eliminated, and thus the system can play an important role in the fight against CO₂ emissions and global warming. The system first introduces CO₂ and electrolyte solution to one or a series of specially designed pipes rotating pipes to create induction inside the pipes, resulting in breaking of the carbon-oxygen bonds and production of solid carbon and gaseous oxygen. The solid carbon and gaseous oxygen are then separated.

The invention provides an indole derivative and a preparation method thereof. The preparation method includes the following steps: mixing a compound shown in a formula I, an additive and a solvent, carrying out a reaction under the conditions of nitrogen or argon and visible light to obtain the indole derivative. In the atmosphere of nitrogen or argon, the compound of the formula I is excited by visible light to be subjected to homolysis of a carbon-oxygen bond, [1,6]-H transfer is carried out, and finally the indole derivative is synthesized by intramolecular free radical coupling and a dehydration reaction. The whole process does not need the participation of a photocatalyst, has the advantages of simple operation, mild condition and high yield, is in line with atomic economy and environmental protection, and has high reference value for industrial preparation of the indole derivative.

The invention relates to the technical field of recycle of rubber powder of junked tires, in particular to a method of recycling the rubber powder of the junked tires through activation. Particles of the junked tires and quick lime are subjected to heat treatment under the action of water; microwave radiation is conducted to damage sulfur-sulfur bonds and sulfur-carbon bonds; in combination with bitumen, carbon-carbon bonds and carbon-oxygen bonds not subjected to microwave radiation are repaired; in combination with the ultrasonic effect in an environment where ammonium hydroxide exists, the rubber powder is pre-activated; in combination with ultraviolet irradiation and addition of polyacrylamide and a desulfurizing agent, in the grinding process through a grinding machine, the sulfur-sulfur bonds and the sulfur-carbon bonds are completely damaged, integrity of the carbon-carbon bonds and the carbon-oxygen bonds is protected, the sulfur content in the rubber powder is substantially lowered, the tensile strength of a rubber product prepared by mixing the rubber powder and natural rubber reaches 28-31 MPa, the tensile elongation at break is increased by 30% or above compared with that of a traditional product, and the performance of the rubber product is improved by 1-2.7% compared with that of natural rubber.

The invention relates to the technical field of children's toy preparation, in particular to a preparation method of high-plastic edible plasticine. The method comprises the steps that bamboo fiber issoaked in a hot acetic acid solution, and chloracetylated cellulose is obtained; the chloracetylated cellulose is subjected to ultrasonic treatment and centrifugalization, and chloracetylated nanocellulose is obtained; a chitosan solution and an agar solution are treated to obtain porous gel, the porous gel is soaked in mixed suspension liquid of the chloracetylated nanocellulose and corn starch,and a plasticine base material is obtained; the plasticine base material, guar gum, maltitol and other raw materials are mixed and heated, and the high-plastic edible plasticine is obtained. Carboxylon a molecular chain and amidogen on amidogen generate ion crosslinking, the viscoplastic property of the plasticine is improved, a carbon-carbon bond, a carbon-oxygen bond and a carbon-hydrogen bondof a blend are difficult to break, the thermal stability of the plasticine is improved, when the plasticine is eaten by children by mistake, the plasticine is turned to be powdery starch polysaccharide substances rapidly, and cannot cause physiological injury to children, and the application prospect is wide.

The invention discloses a preparation method and application of modified nano calcium carbonate, and belongs to the technical field of preparation of modified calcium carbonate. Synthesis of the modified nano calcium carbonate comprises the following steps that calcium carbonate crystal whiskers are put into a vacuum oven at 105 DEG C to be dried for 2 hours, so that the water content is between 0.3-0.6%; a macromolecular modifier ABM is diluted by using an acetone solvent, and a mixed solvent is obtained after uniform mixing; the dried calcium carbonate crystal whiskers are placed into a three-roller continuous modification machine, the mixed solvent is slowly added under medium-speed stirring, and the modified nano calcium carbonate is obtained after stirring is carried out for 30 min. According to the modified nano calcium carbonate, carbon oxygen bonds with stable performance can be introduced on the surface of filler, and in the high-temperature thermal aging process, the modifiednano calcium carbonate can be added into lubricating grease by scarifying the carbon oxygen bonds in molecules to protect other chemical bonds in the lubricating grease, so that the aging speed of alubricating grease system is reduced, and the high temperature resistance is improved.

The invention provides an activation method of graphene oxide. The activation method comprises the following steps: firstly, dispersing graphene oxide in a polar solvent to obtain a graphene oxide solution; secondly, mixing the graphene oxide solution obtained in the previous step, an activating agent and an acid-binding agent to obtain a reaction system; lastly, under an anaerobic condition, heating the reaction system obtained in the previous step for reacting to obtain activated graphene oxide. By adopting the activation method, hydroxyl on the surface of the graphene oxide is activated under a mild condition, and an easy-leaving radical is formed by combining the activating agent and the hydroxyl on the surface of the graphene oxide, so that a carbon-oxygen bond on the surface of the graphene oxide is activated, and the difficulty in subsequently modifying a covalent bond on the surface of the graphene oxide is lowered; an intermediate with higher activity is provided for the surface functional modification of the graphene oxide, so that subsequent surface modification can be performed without extreme conditions, energy consumption is lowered, and the lamellar structure of graphene can be kept well, thereby keeping the characteristic of the graphene.

The invention discloses a preparation method of color-variable anti-counterfeiting low-toxicity inkpad, and belongs to the technical field of chemical engineering. Carboxyl on molecular chains of bamboo charcoal viscose fibers provided by the invention and amino on chitosan can be subjected to high ionic cross-linking action; porous rubber powder is taken as a framework raw material of the inkpad,high hydrogen bond interaction between guar gum, cellulose, chitosan and agar is achieved, and the guar gum, the cellulose, the chitosan and the agar can all absorb water vapor in the air to form a reticular water-retaining structure of saturated hydrogel, so that the inkpad forms a uniform system, is not dried easily, and can be stored for a long time; methyl red is added as an anti-counterfeiting reversible pigment, and fills the gel inkpad through cocrystallization, and carbon-carbon bonds, carbon-oxygen bonds and carbon-hydrogen bonds in the inkpad are difficult to break through hydrogenbond action between hydroxyl of the chitosan and hydroxyl of the agar the cellulose and through action between amino and hydroxyl of the chitosan, so that dehydration of the inkpad is more difficult,and thermal stability of the inkpad is improved.

The present invention pertains to a coating film, and more particularly, to an antifogging coating film having excellent antifogging properties, ability to retain antifogging properties, and water resistance. The coating film according to the present invention contains a metal oxide (A) and a hydrophilic compound (B), wherein the elemental concentration ratio (C1s/M), which is between the element C and a metal element and which is obtained from a metal (M) spectrum derived from the metal oxide and a C1s spectrum in an elemental analysis of the surface using XPS, is within the range of 0.2-10. The relative elemental concentration of the element C obtained from a C1s spectrum derived from carbon-oxygen bonds and/or carbon-nitrogen bonds in elemental analysis of the surface using XPS may be within the range of 5-50 atomic %. The metal oxide may be colloidal silica. The coating film according to the present invention can be particularly preferably used as an antifogging coating film and a coating film for automotive exterior parts.

The invention discloses a processing technology of modified carbon fibers. The processing technology comprises the following steps of a, filament return and thread collection, wherein a protofilamentis selected, after splitting, a new filament and an old filament are connected with a heat-resistant fiber, and the mixture is erected on a thread collection plate; b, primary drying, wherein the thread collection plate and the protofilament are conveyed into a drying device for drying, and the moisture in the protofilament is removed; c, preoxidation; d, carbonization; e, electrolytic oxidation modification; f, soaking modification. The processing technology has the advantages that an electrolytic oxidation mode is adopted for modifying the surfaces of the carbon fibers, active functional groups are introduced into the surfaces of the carbon fibers, the carbon oxygen bonds of the surfaces of the carbon fibers are increased, the contact compactness of the carbon fibers and the surface of acomposite material in the compounding process is improved, and the increase and decrease shearing strength of the synthesized composite material is improved; the interface bonding force of a bondingface is improved, and accordingly the tensile strength and impact-resistance strength of the carbon fiber and resin base material composite material is improved.

The invention relates to a poly-bisacrylamido cationic compound and a preparation method thereof. The preparation method comprises the following steps: carrying out amidation reaction, chloromethylation reaction, ring-opening reaction and quaterization reaction, preparing two different cationic compounds, and carrying out water solution polymerization to obtain the cationic organic high-molecular polymer. The molecules contain cations, and also contain amido groups, ester groups, carbon-oxygen bonds, large pi bonds and water-soluble hydroxy groups. The cation degree and water solubility of the polymer are greatly enhanced as compared with common cationic compounds. Since the organic matter content in sewage (waste water) is greatly enhanced along with the development of the modern industry and the enhancement of the living standard, the organic matter particle surface is usually negatively charged, and the cationic high-molecular flocculant can perform the electric neutralization and adsorptive bridging functions on particles in water, so that the particles in water are destabilized and flocculated, thereby being beneficial to settling and filter dehydration.

The invention provides electrolyte, a lithium ion secondary battery and an electric vehicle. The electrolyte comprises a solvent, lithium salt and additives; the additives comprises aromatic urea compound, and the chemical formula of the aromatic urea compound is as shown in description. By importing the aromatic urea compound in the electrolyte, the benzene ring and carbon-oxygen bond in the aromatic urea compound can form a layer of protective film on a surface of the electrode material through chemical reaction. The protective film is stable in the high-temperature environment and the battery circulating process, thereby effectively prohibiting the reaction of the electrolyte on the surface of the electrode material, and prohibiting the digestion of cathode material metal; the high-temperate circulating performance and the storage performance of the lithium ion battery are improved, the gas production in high-temperature storage is prohibited, the comprehensive performance of the battery under high voltage is improved, and then the problem that the battery is in expansive deformation, internal short-circuiting and electrolyte leakage is avoided.