11408 results about "Chemical industry" patented technology

The invention relates to chemical industry and is directed to the production of middle distillate from vegetable oils. In the first step of the production method, the fatty acids or triglycerides of said vegetable oils are hydrogenated to give n-paraffins, and in the second step, the n-paraffins are catalytically converted to paraffins with branched chains. Using this process having two steps, a high-quality middle distillate useful as a component of diesel fuels without any particular specifications may be produced.

A method for extracting silicon dioxide, alumina and gallium oxide from high-alumina fly ash relates to the technology fields of environmental mineralogy and material, chemical industry and metallurgy. The method comprises the main steps as follows: causing the high-alumina fly ash to react with sodium hydroxide solution; filtering the solution; introducing CO2 to the filtrate for full gelation; cleaning, purifying, drying, grinding and calcining the silica gel after gel filtration to obtain finished white carbon black; adding limestone and a sodium carbonate solution into the filter mass after the reaction and filtration of the high-alumina fly ash and the sodium hydroxide solution; ball grinding the mixture into raw slurry; dissolving out the clinker obtained by baking the raw slurry; subjecting the filtrate to deep desiliconization to obtain sodium aluminate extraction liquid; filtrating the sodium aluminate extraction liquid after subjecting the sodium aluminate extraction liquid to carbon dioxide decomposition; baking the aluminum hydroxide after washing the filter mass to form the aluminum hydroxide product; and extracting the gallium oxide from the carbon dioxide decomposition mother solution and desiliconized solution. The method has the advantages of low material price, simple operating procedures, low investment, low production cost, low energy consumption and less slag.

The present invention generally relates to biochemical and chemical industry, and more particularly to a method which can be used in fermenting carbohydrate substrates of plant origin for producing C1-C5 alcohols, and for synthesis of higher alcohols, other oxygen-containing compounds and hydrocarbons as well as for the production of motor fuel components from biomass. Since C6 and higher alcohols, ethers, acetals, and higher hydrocarbons are not obtainable by a direct biochemical route, it is proposed to synthesize these using known chemical reactions, wherein by-products of fermentation are as raw materials for said synthesis.

The invention discloses a method for grafting a polymer ona surface of graphene. The method comprises the following steps: adding 1 part by weight of graphene or graphene oxide, 10-1000 parts by weight of solvent and 10-1000 parts by weight of vinyl monomer, and adding 0.01-10 parts by weight of initiator under introduction of nitrogen; heating to 55-90 DEG C, and carrying out reaction for 1.5-60hours; and precipitating, centrifugating, washing, and drying, thus obtaining a product of polymer-grafted graphene. The method is convenient and simple in process, can be used for the large-scale production, is the universal method and ensures that a variety of polymers can be grated onto the graphene. The obtained functionalized graphene has good solubility and good solution processability, is conducive and has extensive application value in micro-nano electronics, machinery, chemical industry, high-performance materials and other fields.

The invention relates to a graphene-organic material layered assembly film and a preparation method thereof. The preparation method comprises: using a graphene material and an organic material as raw materials, utilizing interaction of static electricity, hydrogen bonds, coordinate bonds or charge transfer and the like between the graphene and the organic material, and superposing films layer by layer through the film preparation methods such as spin coating, spraying, dipping, lifting and pulling and the like to prepare the film, wherein the thickness of each layer of the film can be controlled between 10 nanometers and 2 millimeters according to requirement. The layered assembly film and the preparation method have the characteristics that multilayer film materials with different functions are prepared by utilizing unique electric, magnetic, mechanical and chemical properties of the grapheme, and can be used as biomaterials, conductive materials, electromagnetic shielding and wave absorbing materials, photovoltaic materials, electrode materials, film filtering and separating materials, and the like to be applied to chemistry and chemical industry, biology and precision instruments, and manufacture of micro electrons, machinery and aviation and aerospace devices according to the selected different organic materials.

The invention relates to the field of natural gas chemical industry, in particular to a natural gas desulfurization process suitable for an offshore floating platform. The natural gas desulfurizationprocess comprises a reactor, a re-reactor and a centrifugal machine; acid gas coming from a boundary region is directly introduced into the reactor, a trivalent complex iron catalyst enters the re-reactor, the trivalent complex iron catalyst at the bottom of the re-reactor enters the reactor under the control of a valve and a pipeline, a chemical reaction is then carried out, divalent complex ironobtained by means of the reaction is centrifuged, the divalent complex iron is conveyed to an electrochemical regeneration device by means of a regenerative feed pump so as to complete the regeneration, and the regenerated trivalent complex iron catalyst is returned to the re-reactor by means of a circulation pump. The natural gas desulfurization process is simple in technological process, smallin equipment size and compact in structure, and adapts to the condition limit of limited production space of offshore floating liquefied natural gas (FLNG).

The invention provides a method for cooperative activation of fly ash and decomposition of gypsum for recovery of a sulfur resource. According to the method, solid waste, i.e., fly ash, discharged by a coal-fired power plant or coal-fired boiler is used as a raw material, a certain proportion of desulfurized gypsum discharged by the coal-fired power plant or waste phosphogypsum produced in the phosphorus chemical industry is added and mixed with the fly ash, then the obtained mixture is subjected to ball milling, and activation and calcination at a temperature of 950 to 1450 DEG C are carried out for 5 to 180 min; calcium sulfate in the gypsum are almost totally decomposed after calcination, and produced gas contains sulfur dioxide or sulfur trioxide which can be used as feed gas for preparation of sulfuric acid; and calcination enables solid fly ash to be activated, leaching with a sulfuric acid or hydrochloric acid solution is carried out at a temperature of 50 to 100 DEG C, and the leaching rate of alumina is greater than 80%. The method provided by the invention has the advantages that since all the raw materials are solid waste, the purpose of treating the waste by using the waste is achieved; elemental sulphur in the gypsum can be recovered; and the fly ash can be activated and activity of the fly ash can be improved, so a high alumina recovery rate at a low temperature can be realized. With the method, high-efficiency extraction of alumina in the fly ash is realized; the sulfur resource in the gypsum is recovered; shortage in industrial sulphur in the sulfuric acid industry in China is compensated; and the method has good economic benefits and wide industrial application prospects.

The invention pertains to the technical fields of chemistry, chemical industry and functional macromolecular materials, in particular relates to a super-hydrophobic and super-oleophilic oil-water separation mesh membrane and a preparation method thereof. The super-hydrophobic and super-oleophilic oil-water separation mesh membrane is prepared with a dip-coating method which comprises the steps that a proper treating agent is selected, epoxy group-terminated oligomeric siloxane is copolymerized with bisphenol A on a proper condition; the oligomeric siloxane-bisphenol A copolymer is mixed evenly with the treating agent to form a solution; the oligomeric siloxane-bisphenol A copolymer is cured on a fabric net of 100 meshes to 400 meshes to obtain the super-hydrophobic and super-oleophilic oil-water separation mesh membrane. The mesh membrane contains no fluorin, and has high hole penetration and good oil / water separation effect. The preparation method of the mesh membrane is simple.

The invention provides an electrostatic spinning nanofiber membrane as well as a preparation method thereof. The electrostatic spinning nanofiber membrane provided by the invention comprises a fiber membrane obtained by electrostatically spinning a high-melting-point polymer and a fiber membrane obtained by electrostatically spinning a low-melting-point polymer, wherein the difference on the melting points of the high-melting-point polymer and the low-melting-point polymer is not less than 10 DEG C. The electrostatic spinning nanofiber membrane provided by the invention is multipurpose and can be applied to the fields such as biomedicines, energy and chemical industry, gas and liquid filtration, waterproofness and windproofness, windproofness and heat insulation, moisture permeability and ventilation, environmental management and semiconductor sensors. According to the electrostatic spinning nanofiber membrane provided by the invention, electrostatic spinning is respectively carried out on the high-melting-point polymer and the low-melting-point polymer, and the high-melting-point polymer fiber membrane and the low-melting-point polymer fiber membrane obtained are composited and hot-pressed to obtain the electrostatic spinning nanofiber membrane. The preparation method provided by the invention is high in production efficiency and low in energy consumption, and is suitable for industrial production.

The invention provides a method for preparing a graphene-carbon nano tube hybrid composite and relates to a method for preparing a functional high molecular material and a device thereof. The method comprises the following steps of: carrying out the stirring and sonic oscillation treatment on graphene and carbon nano tubes to preform an entangled network structure, thoroughly mixing the entangled network structure and polymer particles, and thus obtaining an uniformly-mixed system in which the graphene-carbon nano tube network is coated on the surfaces of the polymer particles after removing the solvent; and putting the uniformly-mixed system in a mould, hot-compacting, and obtaining the graphene-carbon nano tube hybrid composite after cooling and demoulding. By mingling the graphene and the carbon nano tubes in advance to form the communicated network structure, the method realizes the advantage complementation of the graphene and carbon nano tube structures and enables the hybrid composite to have favorable electric conduction and heat conduction properties. The method can be widely used in the fields such as aviation, transportation and communication, electronic industry, civil facilities, construction, chemical industry and the like, can be produced in the industrial scale, and has the advantages of low cost and environmental friendliness.

The invention belongs to the technical field of chemistry and chemical industry and functional materials, and relates to a method for preparing a metal mesh which has special wetting properties and is used for oil-water separation. The method adopts simple wet-method chemical etching technology, nano-scale microscopic bulges are prepared on the surface of a metal mesh with micron-grade pore diameters, and then a compound which does not contain fluorine and has low surface energy is modified on the surfaces of the microscopic bulges. For the surface of the prepared material, a contact angle of a water drop is more than 150 degrees, and a contact angle of oil is close to 0 degree. Due to the specific wetting properties, the material can allow the oil to pass through the metal mesh smoothly, but the water cannot permeate through the metal mesh completely, so that the property of effectively separating oil-water mixtures is realized. Particularly, the specific wetting properties of the surface of the material can keep stable in acid solution, alkali solution and salt solution, and thus the functional metal mesh can be excellently applied in aspects of metal corrosion prevention and the like. A mesh membrane does not contain the fluorine, and has the advantages of simple preparation method, high permeability of pore space and good oil-water separation effect, and corrosion resistance.

The invention discloses a PHBV with good performance and a copolymer of PHBV and PLA and the preparation technique method. The invention is characterized in that 1 per cent to 99 per cent of PHAs, 1 per cent to 99 per cent of PLA1 and other additives 0-40 per cent are put in a mixer for 1 to 30 minutes, and then put in an electricity hot blast drying oven a temperature ranging from 40 to 100 DEG C for 2 to 48 hours after being mixed equally. The dried compound is plastified in a double screw extruder, the highest temperature of the double screw extruder is between 90 and 180 DEG C according to the the different content of PHAs and the temperature of the mouth mold is between110 to 170 DEG C. The material extruded from a die head is cooled, stretched and grained to form the complete biodegradation aggregate. The resin consisting of PHBV and copolymer of PHBV and PLA is able to be used for producing the thin films, plates and sheet materials and injected mold to plastic materials. The compound has biological degradability and good machining performance. The target product of the compound has excellent mechanical properties and can be used for replacing the petroleum base plastic to be widely used for packing, agriculture, medical material, electron, chemical industry concerning products for daily use, etc.

The invention relates to a nanometer cellulose / polyvinyl alcohol gel composite material, which is characterized by comprising hydrogel and aerogel. A preparation method of the nanometer cellulose / polyvinyl alcohol gel composite material comprises the following process steps of 1, nanometer cellulose preparation by a chemical combination mechanical treatment method; 2, composite hydrogel preparation; and 3, composite aerogel preparation. The nanometer cellulose / polyvinyl alcohol gel composite material has the advantages that the composite aerogel belongs to a porous amorphous solid material consisting of nanometer level colloid particles or high-polymer molecules, and a unique open nanometer level porous structure and a continuous three-dimensional reticular structure are adopted, so the density is extremely low, the specific surface area is high, and the porosity is high, wherein the solid phase of the aerogel accounts for 0.2 percent to 20 percent of the total volume percentage, the characteristics of high adsorption catalytic capability, low thermal conductivity, low sound resistance, low refractive index and the like are shown, and wide application prospects are realized in the fields of aviation, spaceflight, chemical industry, metallurgy, energy-saving building and the like.

The invention discloses a kind of catalysis crack method and its device in petroleum chemical industry, to solve the problems as the whole activeness reduction of mixed catalysts and the flexibility lack of adjusting the agent-oil proportion of heavy oil riser reactor caused by the mixing wise of the spend catalyst and regenerating catalyst of the present two-riser catalysis crack device. The main characteristics of the invention method are: part of the spent catalyst from the light hydrocarbon riser reactor (4) gets into catalyst mixer through the spent catalyst duct (3) set flow control valve (1) after water vapour stripped in the stripping section (7) of the second settler, and gets into heavy oil riser reactor (12) to react after mixed by the effect of water vapour with the regenerating catalyst form regenerator (14) in catalyst mixer. The method of the invention is suitable to be used in the two-riser catalysis crack craft and the three-riser catalyst crack craft set heavy oil riser reactor; the invention has disclosed related devices.

The invention belongs to the technical field of chemical industry, in particular to a purification technique for coal glycol rude products. According to the technique, saponification, carbinol-removal, hydrogenation reaction, three-column distillation and absorption treatment are utilized to prepare the glycol with a mass percent more than 99.9% from the coal glycol rude products and the polyester glycol products having high transmissivity to the ultraviolet with wavelength between 220 and 350 mm. The purification technique for coal glycol rude products of the invention is characterized by low energy consumption, easy operation and high efficiency.

The invention provides a transparent thermal insulation anti-ultraviolet coating and a preparation method thereof, belongs to the technical field chemical industry, materials and environmental protection and relates to the transparent thermal insulation anti-ultraviolet coating which can reduce the transmission of solar energy and ultraviolet and the preparation method thereof. The coating comprises nano-slurry with the thermal insulation anti-ultraviolet function and a film-forming substance, and is combined with the synergistic effects of a wetting dispersant and a hyper-dispersant for preparing the nano-slurry with high solid content and stable dispersion. The preparation process of the coating is simple and can greatly improve the solid content of the coating, ensure the optical effect of a paint film after coating, simultaneously organically combined powder with different functions and obtain the thermal insulation anti-ultraviolet functional coating with satisfactory effects. The coating has the characteristics of low transmission of ultraviolet and near infrared light of solar rays, high transmission of visible light and the like, and can be coated on glass, polycarbonate or organic glass and other transparent materials, and achieve the purposes of energy conservation and protection.

The invention belongs to the technical field of chemical industry, and relates to a cooling water corrosion inhibitor, in particular to an efficient composite corrosion and scale inhibitor which can remarkably reduce corrosion and scaling phenomena of the cooling water of a petrochemical system. The corrosion and scale inhibitor is prepared by evenly mixing organic phosphine carboxylic acid corrosion inhibitor, organic multi-element phosphine acid corrosion and scale inhibitor, polymer scale inhibitor, metal ion succimer, surface active agent, zinc salt, functionality additive and water. The corrosion and scale inhibitor prepared from the components has low phosphine content and excellent corrosion and scale inhibition performance, can prolong the service life of devices, improve the repeated utilization rate of cooling water and reduce the water resource consumption.

The invention discloses a device and a method for preparing hydrogen through temperature controlled continuous decomposition of hydrogen sulfide, belongs to the technical field of hydrogen preparation and gas purification, and relates to a dielectric barrier discharge temperature controllable plasma generating device and a method for preparing hydrogen through continuous and stable ionizing decomposition of a hydrogen sulfide gas or a gas containing hydrogen sulfide by using the device. The device is characterized in that a reactor has a coaxial sleeve type structure, a cylinder of the reactor is made of an insulating medium, a central electrode is formed by a metal, a grounding electrode is formed by a temperature controllable circulating liquid, and decomposed sulfur is separated through temperature control, so that continuous and stable operation of preparing the hydrogen through the decomposition of the hydrogen sulfide is ensured. The invention has the advantages that the method is suitable for preparing the hydrogen and elemental sulfur by dissociating the gases containing the hydrogen sulfide in chemical industries of natural gas, petroleum and coal; and the method does not have special requirement or limitation for the source and the composition of the gases, so the method has universal applicability for preparing the hydrogen and the elemental sulfur through the decomposition of the hydrogen sulfide.

The invention relates to a preparation method of a polymer / graphene nano composite membrane, and aims to solve the problem that the existing polymer membrane material can not be applied in a large scale because the existing polymer membrane material is poor in hydrophilic property, is polluted easily and particularly is polluted by microbes and extracellular polymer easily. The preparation method disclosed by the invention comprises the steps of 1, taking a graphene nano material, a polymer, an organic solvent, an organic additive and an inorganic additive in parts by weight; 2, preparing a graphene nano material suspension; 3, preparing a membrane casting solution; 4, preparing a membrane by using the membrane casting solution in a coagulation bath medium to obtain a coagulation membrane, and then soaking the coagulation membrane in deionized water. The nano composite membrane disclosed by the invention is good in hydrophilic property, the irreversible pollution level of the nano composite membrane is significantly reduced, the anti-pollution capacity of the polymer membrane is effectively improved, the water flux is improved, and the polymer / graphene nano composite membrane disclosed by the invention is applied to the field of chemical industry.

The invention relates to a method for preparing high-melting-point refined wax capable of being applied to plastics, rubber processing, wood processing, food processing and other industries and particularly relates to a method for improving the solidifying point of Fischer-Tropsch wax. According to the method for preparing high-melting-point refined wax with excellent performances, distillation refining is carried out on light-weight oil serving as a raw material by means of continuous high-vacuum distillation, wherein the light-weight oil is produced by indirect coal liquefaction; According to the technical scheme, the method comprises two steps, namely, firstly, feeding the raw material in an evaporator by a feed pump so as to heat and evaporate the oil components and other low-boiling-point substances under the conditions of high temperature and high vacuum degree; secondly, feeding the coal-based synthetic oil without oil components and other low-boiling-point substances into a distiller, heating and evaporating the coal-based synthetic oil products by using heat-conduction oil under extremely high vacuum condition, condensing and capturing in a condenser to obtain the target product. The method disclosed by the invention can be widely used in the field of chemical industry.

The invention relates to a rolling bearing fault diagnosis method. The method uses a learning algorithm of a CNN (Convolutional Neural Network) theory to complete a feature extraction task needed by fault diagnosis, and does not rely one manual selection, intrinsic features of input data are extracted automatically from simple to complex and from low-level to high-level, and abundant information hidden in known data can be dug out automatically; and a support vector regression method is used to identity a test sample in a classifying manner, support vector regression with a high generalization capability can be used to identity an unknown new sample in higher precision, and the disadvantage that a default classifier of deep learning tends to be low in the generalization capability can be overcome when support vector regression serves as a classifier to identify samples in the classified manner. The rolling bearing fault diagnosis accuracy and validity can be improved, a new effective approach is provided for solving problems in rolling bearing fault diagnosis, and the method of the invention can be widely applied to fault analysis of complex mechanical systems in the fields of chemical industry, metallurgy, electric power, aviation and the like.

The invention discloses a method for modification, dyeing and multifunctional composite finishing of aramid fiber, and belongs to the technical field of textile chemical industry. Through surface physical and chemical modification for the aramid fiber, the method improves the physical and chemical states of the aramid fiber surface and is favorable for the dyeing and after finishing of the aramid fiber. The specific process flow comprises the following steps of cleaning before the dyeing of the aramid fiber, pretreatment of the aramid fiber, dyeing of the aramid fiber, and multifunctional composite finishing of the aramid fiber. Not only the dyeing property of the aramid fiber treated by the method is remarkably improved, but also the dyeing fastness is good, the aramid fiber has good moisture permeability particularly, and simultaneously the aramid fiber is endued with good anti-ultraviolet ageing function. Moreover, the aramid fiber is subjected to composite finishing by adopting a nano composite sol, and the method has wide applicability, simple process, relatively low treatment cost, and low requirements on the applied technology and equipment.

The invention provides a method for preparing normal propyl alcohol by glycerol hydrogenation, wherein glycerite or biodiesel byproduct glycerol which is diluted by glycerol or solvent reacting with hydrogen or gaseous mixture containing hydrogen to generatenormal propyl alcohol, which provides a new way for synthesizing normal propyl alcohol. The present invention can enhance activity of glycerol hydrogenation and selectively generates normal propyl alcohol, also can make normal propyl alcohol united generating with 1,2-propanediol, ethandiol, methylic alcohol and ethyl hydrate, thus its product process program is very flexible. The present invention is characterized in that its technological condition is geniality, raw material is cheap and can be obtained easily and the cost of manufacture is low, which belongs to environment friendly green chemical industry technique.

The invention comprises a composite microbial agent applicable to efficiency enhancement of common chemical industry sewage treatment systems. The composite microbial agent applicable to efficiency enhancement of the common chemical industry sewage treatment systems meets the demands on treatment on comment pollutants in existing chemical industry and environmental production as well as on establishment of functional bacteria required by a stable bacteria flora. According to one of the schemes, the composite microbial agent is composed of 108 microorganisms of three major functional types. When the composite microbial agent is added together with microbial growth promoting carriers, nutrient agents and the like into a biochemical system, the composite microbial agent can promote establishment of a complete food chain in the biochemical system through various microorganisms with special pollutant degrading capabilities and comprehensive metabolic manners to enhance utilization and metabolic decomposition of pollutants in sewage through the microorganisms, thereby achieving efficient reduction of COD (chemical oxygen demand), ammonia nitrogen, phosphorous, sulfur and like.

The invention provides a method for producing lead oxide by recovering waste lead-acid batteries based on an atom economy way and belongs to the field of chemical industry for clearing and recovering waste lead-acid batteries. The method comprises the steps of: heating lead paste and lead powder of the lead-acid batteries, and then carrying out solid phase mixing reaction, sodium hydroxide alkaline desulfurization and sodium hydroxide leaching to directly obtain a lead-bearing alkaline solution and filter residue; and carrying out purification and cooling crystallization on the solution so as to obtain high-purity lead oxide and a by-product sodium sulfate so as to eliminate the defect that a large quantity of chemical raw materials are required to be consumed in a conventional synthesis process of the lead oxide so that the method is a clean and energy-saving new technology and has a large-scale industrial application prospect.

The invention relates to a welding method of a girth weld of an inner cladding thin-walled stainless steel composite tube. The welding method comprises the following steps: girth welds of the inner cladding stainless steel composite tube are respectively and gradually welded by three welding seams, an inner cladding layer welding seam and a transition layer welding seam are welded by argon tungsten-arc welding, the stainless steel inner cladding layer welding seam adopts welding wires with the same quality thereof, the transition layer welding seam adopts ER309 welding wires, and the base layer is welded by shielded metal arc welding or CO2 gas shielded welding and adopts a welding material matched with the strength of the base layer; and the inner cladding layer, the transition layer and the first layer of the base layer are welded under back argon gas protection. The welding method guarantees corrosion resistance of a joint of the inner cladding layer and mechanical property of a welding joint of the base layer; and the method plays an important role in promoting wide application of the inner cladding stainless steel composite tube in businesses such as oil-gas delivery, chemical industry, oil refining and the like, improving corrosion resistance of an inner wall of a pipe, and solving the problems of high cost and the like caused by adopting a full wall-thickness stainless steel pipe.

The invention belongs to the technical field of the chemical industry, and relates to grease and a preparation method thereof, in particular to anhydrous albany grease and the preparation method thereof. The anhydrous albany grease and the preparation method comprises the following components by weight: 82-90% of base oil, 1-4% of calcium hydroxide, 6-15% of fatty acid, 0.3-1% of antioxygen, 0.5-1.5% of rust inhibitor, and 0.5-3% of extreme pressure antiwear additive. The anhydrous albany grease and the preparation method have the benefits as follows: the grease is simple in preparation process and easy to control; and the prepared product has better water erosion resistance, favorable metal adhesivity and extreme pressure abrasion resistance, and can provide outstanding lubrication and abrasion resistance protection for wheel bearings and chassis.

The invention belongs to the technical field of energy chemical industry. The process for preparing synthetic gas by biomass pyrolysis and gasification is divided into three steps of biomass low-temperature pyrolysis, coke or semi-coke high-temperature gasification and crude synthetic gas / tar catalytic reforming. The three reaction steps are successively and continuously carried out in three relatively independent spaces of an upper pyrolysis hearth, a lower gasification hearth and a catalyst bed inside the same gasification reaction device so as to finally obtain the high-quality synthetic gas. The method provided by the invention has high carbon conversion rate, produces no secondary pollution and is simple to realize. In addition, required biomass is rich in reserves and can be regenerated, thus realizing integrated sustainable utilization of resource, energy and environment.