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Preparation method of energetic fragment of composite charge structure
ActiveCN110340349AWide variety of sourcesLow costTransportation and packagingMetal-working apparatusCombustionUltimate tensile strength
The invention relates to a preparation method of an energetic fragment of a composite charge structure, and belongs to the field of energetic materials and active fragment materials. The preparation method comprises the following steps of uniformly mixing tungsten powder / PTFE powder in an omnidirectional planetary ball mill; putting the uniform powder in a custom mold, and carrying out pre-press molding to obtain a hollow cylindrical pre-pressing piece A; uniformly mixing aluminum powder, the tungsten powder and polytetrafluoroethylene powder in the omnidirectional planetary ball mill, fillingthe hollow cylindrical pre-pressing piece A with the uniform powder, and carrying out pre-press molding; and sintering to obtain a final product. According to the energetic fragment, as an energeticmaterial, and the energetic fragment is very insensitive and safe in static state, and has a certain toughness and strength, so that the energetic fragment can be directly machined; violent explosionand combustion are generated under the high-speed impact action, and high heat and high temperature are generated; and as a fragment material, high-kinetic energy is utilized to impact high chemical energy released after explosion, and combined damage of penetration, implosion, arson and overpressure can be carried out on a target.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Traditional Chinese medicine preparation for treating gastric dynamic dysfunction
InactiveCN101361958AEnhance yangRecovery functionDigestive systemPlant ingredientsCurative effectSemen
The invention discloses a traditional Chinese drug preparation for treating gastrokinetic insufficiency. The preparation comprises 19 drugs including 3g of ginseng, 15g of stir-fried rhizoma atractylodis alba, 10g of Tuckahoe, 3g of prepared radix glycyrrhizae, 20g of yam, 10g of herba cistanches, 10g of semen cuscutae, 10g of medlar, 5g of radix aconiti carmichaeli, 5g of rhizoma zingiberis, 10g of fructus aurantii immaturus, 30g of honey-fried radix astragali, 3g of pericarpium citri reticulatae, 10g of hawthorn, 10g of massa medicata fermentata, 10g of stir-baked fructus hordei germinates, 5g of stir-baked radix bupleuri with vinegar, 5g of radices saussureae and 10g of rhizoma ligustici wallichii. The traditional Chinese drug preparation can serve as an oral solution put into clinical application, is produced conventionally according to the production of oral solutions and has no special technical requirements and other accessories. The traditional Chinese drug preparation has reliable short-term curative effects, remarkable long-term curative effects and no relapse after recovery.
Owner:陈朝东
Gallium nitride based field effect transistor and preparation method thereof
ActiveCN104701364AGood thermal conductivity and thermal stabilityReduce spontaneous thermal effectsSemiconductor/solid-state device manufacturingSemiconductor devicesGallium nitrideField-effect transistor
The invention discloses a gallium nitride based field effect transistor. The gallium nitride based field effect transistor comprises a substrate, a buffer layer, a GaN layer, an AlGaN layer, a source electrode, a drain electrode and a grid electrode located between the source electrode and the drain electrode which are sequentially stacked from bottom to top, wherein the source electrode and the drain electrode are arranged on the AlGaN layer, the grid electrode is made from conductive diamond-like carbon (DLC), and the spe key content in the conductive DLC is higher than 50%. The diamond-like carbon is used as a grid electrode material, so that the spontaneous heat effect of a grid electrode region is reduced, stability is improved, meanwhile a resistance value and polarity of the grid electrode are adjusted in a diamond-like carbon doping mode, and the purpose of enhanced work is achieved. The invention further discloses a preparation method of the transistor.
Owner:XIAMEN SANAN INTEGRATED CIRCUIT
Production of nickel-hydrogen diaphragm and products thereof
InactiveCN1747199ASimple processEase of industrial implementationCell component detailsLow-density polyethyleneFiber
The process for preparation of Ni-MH battery separator includes following steps: ú¿1ú® polyolefine Fiber made of low density polyethylene is used to make battery separator base fabric; (2) the battery separator base fabric is treated with sulphonation that is: select 93-98% oil of vitriol as sulphonation agent, 129-144 Deg C. sulphonation temperature, 10-80 S sulphonation time; meantime apply 0-30 N / 50mm tension on the battery separator base fabric;(3) 50-70% vitriol and 20-30% vitriol are separately used to wash it one time; pure water is used to wash it two times; then under 80í¬90 Deg C. and for 50-70 min , make it drying.
Owner:TIANJIN POLYTECHNIC UNIV
Method for preparing polyphenylene sulfide fiber insulation paper
InactiveCN101949082ASimple processEase of industrial implementationNon-woven fabricsCardingRolling mill
The invention discloses a method for preparing polyphenylene sulfide fiber insulation paper. In the preparation method, 100 percent of polyphenylene sulfide fiber is adopted as a raw material, and is subjected to 2-3 pass opening, high-speed carding, vertically and horizontally 90-degree cross lapping, and a hot rolling process to be prepared into the polyphenylene sulfide fiber insulation paper. The length of the polyphenylene sulfide fiber is 20 to 78mm, and the fineness is 0.7 to 8.0dtex; the speed of the high-speed carding is 1,200 to 1,600m / min; and in the hot rolling process, a flat hot mill or a roller hot mill is used, when the roller hot mill is adopted, parameters are that: the hot rolling temperature is 240 to 282 DEG C, the roller speed is 2 to 20m / min, and the hot rolling pressure is 200 to 2,000N / cm, and when the flat hot mill is adopted, the parameters are that: the hot rolling temperature is 240 to 282 DEG C, the hot rolling pressure is 2 to 30MPa, the hot rolling time is 10 to 50min, and the front and the back are respectively hot rolled once or twice.
Owner:TIANJIN POLYTECHNIC UNIV
Preparing method of composite energetic fragment with metal matrix on outer layer and polymer matrix on inner layer
The invention relates to a preparing method of a composite energetic fragment with a metal matrix on an outer layer and a polymer matrix on an inner layer, and belongs to the field of energetic materials and active fragment materials. Tungsten powder / zirconium powder is placed in a comprehensive planetary ball mill to be evenly mixed; uniform powder is placed in a customization mold, and pre-pressing molding and demolding are carried out; sintering is carried out, and a hollow cylindrical product A is obtained; aluminum powder, tungsten powder and polytetrafluoroethylene powder are placed in the comprehensive planetary ball mill to be evenly mixed, the hollow cylindrical product A is filled with uniform powder, and pre-pressing molding is carried out; and sintering is carried out, and a final product is obtained. The material serves as the energetic material and is very insensitive and safe under the static state, has certain toughness and strength and can be directly machined. Under the high-speed impact effect, violent explosion and combustion happen, and high heat high temperature is generated; and the material serves as the fragment material, high kinetic energy and high chemical energy released after impact explosion are used, and comprehensive damage of penetration, inner explosion, fire setting and overpressure of the target can be achieved.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Clean preparation method of hydrogenation catalyst carrier
ActiveCN104646070AEasy to prepareEasy to operateCatalyst carriersHydrocarbon oils treatmentOrganic acidMicrowave
The invention relates to a clean preparation method of a hydrogenation catalyst carrier. The preparation method includes following steps: (1) preparing an organic acid solution; (2) mixing the organic acid solution with an oxide precursor to prepare a binding agent; (3) mixing the binding agent with a catalyst carrier raw material powder; and (4) performing a moulding process, a drying process, a microwave-treating process and a roasting process to obtain the catalyst carrier. Compared with a method in the prior art, the method employs the organic acid as a peptizing acid during the preparation process of the catalyst carrier. By means of increase of the concentration of the organic acid, the peptizing property is improved. Through appropriate drying and carrier roasting processes of the carrier, the catalyst carrier is ensured in strength. The method can achieve clean production of the catalyst carrier.
Owner:CHINA PETROLEUM & CHEM CORP +1
Graphene-based antibacterial fabric preparation method
ActiveCN109653005ASimple processEasy to operateBiochemical fibre treatmentLight resistant fibresCooking & bakingBenzyl benzoat
The invention provides a graphene-based antibacterial fabric preparation method which includes the steps: (1) fabric pretreatment: soaking a fabric by treatment liquid containing alkaline liquor and penetrating agents, and washing the fabric by water to reach neutral; (2) dyeing liquor preparation: diluting graphene oxide slurry by water, adding buffering solution and BB emulsion, uniformly mixingmixture to obtain dyeing liquor; (3) high-temperature dyeing: dyeing the fabric at high temperature by a temperature programming method according to a certain bath ratio; (4) drying and baking: drying the dyed fabric at the temperature of 110-150 DEG C, baking the dried fabric for 1-5 minutes at the temperature of 180-200 DEG C to obtain the antibacterial fabric based on the graphene. The BB emulsion is mixed emulsion of benzyl benzoate and polyoxyethylene castor oil. The antibacterial fabric preparation method based on the graphene is simple in process, easy to operate, the prepared textilefabric has excellent antibacterial and ultraviolet-proof functions, and a user instantly feels cool when contacting with the fabric.
Owner:天津北方石墨烯产业研究院
High-power alloy foil resistor and manufacturing method
ActiveCN113113199AImprove cooling effectUnobstructed diffusionMass resistorsResistor detailsMetallic materialsAlloy
The invention discloses a high-power alloy foil resistor which comprises a substrate, a resistor element attached to the substrate and electrodes connected to the two ends of the resistor element. The resistor element comprises an intermediate material piece and two resistor alloy pieces, the middle material piece is clamped between the two resistance alloy pieces and is connected with the two resistance alloy pieces at the same time, the two resistance alloy pieces are connected with the electrodes at the two ends respectively, and the intermediate material piece is made of a low-resistivity high-thermal-conductivity metal material. As the middle area of the resistance element is replaced by the low-resistivity high-thermal-conductivity material, a heat accumulation area is divided into two parts. The heat accumulation points of the resistor element can be segmented, and a heat transmission path is shortened, so that the heat dissipation capability of the whole resistor is improved, and the service power of a product is improved. Meanwhile, the middle part of the resistor element is replaced by the low-resistivity metal, so that the designed length of the resistor element is reduced, and the resistor with a lower resistance value can be designed and produced.
Owner:NANJING SART SCI & TECH DEV
Preparation method of hydrotreating catalyst carrier
ActiveCN104646072AHigh strengthPerformance impactCatalyst carriersCatalyst activation/preparationHalogenAmmonium carbonate
The invention relates to a preparation method of a hydrotreating catalyst carrier. The preparation method includes following steps: (1) preparing a halogen inorganic acid solution; (2) mixing the halogen inorganic acid solution with an oxide precursor to obtain a binding agent; (3) mixing the binding agent with catalyst carrier raw material powders and performing a moulding and drying process; and (4) impregnating the dried material in the step (3) with an ammonia water solution, an ammonium carbonate solution or an ammonium bicarbonate solution, and drying and roasting the impregnated material to obtain the catalyst carrier. Compared with a preparation method in the prior art, the preparation method is carried out with the low-pollution and low-cost halogen inorganic acid as an acidic glue solvent during the process, so that a problem of NOx pollution during the preparation process of the catalyst carrier is solved and a poor influence on performances of the catalyst carrier with the halogen inorganic acid is overcome.
Owner:CHINA PETROLEUM & CHEM CORP +1
Chip data output signal protection method and its circuit
InactiveCN101055613ANo special process requirementsLow costInternal/peripheral component protectionTime delaysEffective date
The invention provides a method for protecting chip data output signal and its circuit. The invention relates to an embedded chip interface, in particular to a method for protecting chip interface data output signal and its circuit. The data output signal in the chip is outputed by the pin line of chip output interface via the gating circuit. In the debug stage of system design, the time delay circuit in the control logic circuit, under the action of reset signal in the chip, generates the time delayed signal to act on the gating circuit for prohibiting data signal from being outputed and controlling the output controlling register in the logic circuit to output the default value, after signal is delayed, the gating circuit is allowed to output data signal. In the normal working stage of chip, the output controlling register in the control logic circuit recieves the read-in data instruction of CPU in the chip, in the effective date of time delayed signal, the read-in data instruction places the number for the output controlling register through the CPU port and prohibits the gating circuit from outputing data signal. The protection method and circuit has simple stucture, and can prevent the leakage of chip code without the special process.
Owner:SOUTHEAST UNIV
Composite energetic fragment containing tough outer layer and brittle inner layer and preparation method of composite energetic fragment
The invention discloses a composite energetic fragment containing a tough outer layer and a brittle inner layer and a preparation method of the composite energetic fragment. The preparation method comprises the following steps that an inner layer material containing a tungsten-zirconium alloy is obtained; the outer side of the inner layer material is filled with mixed ball-milled powder of aluminum metal powder, nickel metal powder and reinforcing material powder, co-die pressing and co-sintering are carried out, and the composite energetic fragment is obtained. The preparation method is simple in process and low in production cost, and the obtained composite energetic fragment is provided with the high-strength and high-toughness outer layer and the high-brittleness inner layer and has very high penetration and secondary damage efficiency.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Microwave transistor of patterned grid structure and manufacturing method thereof
ActiveCN106024880AImprove gate control abilityGuaranteed current output capabilitySemiconductor/solid-state device detailsSolid-state devicesDensity reductionMicrowave
The invention discloses a microwave transistor of a patterned grid structure. The transistor is provided with a patterned region between the source electrode and the drain electrode of a barrier layer. Within the patterned region, the surface of the barrier layer partially concaves downwards along the thickness direction to form a plurality of grooves. A grid is arranged to cover the patterned region. The length of the grid is larger than the lengths of the grooves along the length direction of the grid, so that the grid can completely cover the grooves. On one hand, by means of the grooves, the grid control capability of a device is improved and the short-channel effect is suppressed. On the other hand, an original heterostructure below the grid is preserved. In this way, the reduction of the conductive capacity due to the density reduction of two-dimensional electron gas can be avoided. Therefore, the current output capability of the device is ensured while the short-channel effect is suppressed at the same time. The invention also discloses a manufacturing method of the above microwave transistor.
Owner:XIAMEN SANAN INTEGRATED CIRCUIT
A kind of preparation method of alkaline secondary zinc-nickel storage battery
InactiveCN103794824BReduce deformationExtend your lifeCell electrodesCell component detailsInternal resistanceDissolution
The invention discloses a preparation method of an alkaline secondary zinc-nickel storage battery. The method adopts an inorganic organic compound thixotropy alkaline gel electrolyte to alleviate the dissolution of a zinc electrode plate and lower the zinc dendrite generating probability; the method adopts a two-diaphragm combining manner for combining a polypropylene diaphragm subjected to grafting or sulphonation treatment and a PP / PE blending diaphragm, wherein the modified polypropylene diaphragm is adopted to effectively prevent zinc ions from enrichment in an imbibition diaphragm, and the blending type diaphragm is adopted to effectively keep the imbibition quantity of the diaphragm and avoid a condition that the diaphragm lacks of a solution so that the internal resistance of the battery is increased; the organic or carbon source coating treatment is preformed on zinc oxide, coating carbon is used for one or more coating treatment, and thus the conductivity and the combination property of the material are improved; nanometer sub-titanium oxide porcelain powder is adopted as a zinc electrode plate addition agent and is good in conductivity and electrochemical stability, and thus the property of a zinc electrode plate is remarkably improved by adding the material.
Owner:HUNAN SCI & TECH RES & DEV CENT
Production of nickel-hydrogen diaphragm and products thereof
InactiveCN100362676CSimple processEase of industrial implementationCell component detailsLow-density polyethyleneFiber
The process for preparation of Ni-MH battery separator includes following steps: ú¿1ú® polyolefine Fiber made of low density polyethylene is used to make battery separator base fabric; (2) the battery separator base fabric is treated with sulphonation that is: select 93-98% oil of vitriol as sulphonation agent, 129-144 Deg C. sulphonation temperature, 10-80 S sulphonation time; meantime apply 0-30 N / 50mm tension on the battery separator base fabric;(3) 50-70% vitriol and 20-30% vitriol are separately used to wash it one time; pure water is used to wash it two times; then under 80í¬90 Deg C. and for 50-70 min , make it drying.
Owner:TIANJIN POLYTECHNIC UNIV
Clean preparation method of hydrotreating catalyst carrier
ActiveCN104646071AEasy to prepareEasy to operateCatalyst carriersCatalyst activation/preparationOrganic acidPhosphoric acid
The invention relates to a clean preparation method of a hydrotreating catalyst carrier. The clean preparation method includes following steps: preparing a mixed acid solution, in which phosphorus acid and an organic acid are contained; mixing the mixed acid solution with an oxide precursor to prepare a binding agent; mixing the binding agent with catalyst carrier raw material powders; and performing a moulding process, a drying process and a roasting process to obtain the hydrotreating catalyst carrier. Compared with the prior art, the invention provides the clean preparation method of the hydrotreating catalyst carrier, by which a problem of polluting exhaust gas emission during the preparation process of the catalyst carrier is solved by employing the composite acid, and meanwhile performances of the catalyst carrier are ensured.
Owner:CHINA PETROLEUM & CHEM CORP +1
Pure Chinese medicinal composition for treating chronic intestinal dysfunction and externally applied pure Chinese medicinal powder patch prepared from same
ActiveCN102805794AAvoid side effectsNo allergiesDigestive systemPharmaceutical delivery mechanismMonkshoodsOral medicine
The invention provides a pure Chinese medicinal composition for treating chronic intestinal dysfunction and an externally applied pure Chinese medicinal powder patch prepared from the same. The pure Chinese medicinal composition is prepared from the following Chinese medicines in part by weight: 1 to 15 parts of fingered citron, 1 to 9 parts of wild ginger, 1 to 12 parts of common monkshood mother root, 1 to 18 parts of giant typhonium rhizome, 1 to 12 parts of clove, 1 to 15 parts of nutgrass galingale rhizome, 1 to 9 parts of borneol, 1 to 9 parts of mint, 1 to 9 parts of camphor, 1 to 9 parts of frankincense and 1 to 15 parts of giant knotweed. The invention also provides application of the pure Chinese medicinal composition for treating chronic intestinal dysfunction to preparation of a pure Chinese medicinal preparation for treating chronic intestinal dysfunction, and the externally applied pure Chinese medicinal powder patch which is prepared from the pure Chinese medicinal composition and used for treating chronic intestinal dysfunction. The pure Chinese medicinal composition can be taken as an externally applied medicine, so that a phenomenon that an oral medicine directly irritates an intestinal canal is avoided; and the pure Chinese medicinal composition has high compliance, does not have any side effect, is prepared from natural Chinese medicines, is non-irritating and non-allergic, does not have any special process requirement, and is convenient, practical and worthy of popularization.
Owner:SHANGHAI YANGPU CENT HOSPITAL
Method for recovering valuable metal from waste chemical reagent
PendingCN112941326AHigh purityHigh extraction rateProcess efficiency improvementChemical reactionMechanical crushing
The invention belongs to the technical field of hazardous waste resource utilization, and particularly relates to a method for recovering valuable metal from a waste chemical reagent. The method comprises the following steps of (1) classifying and storing the waste chemical reagent, and classifying same metal simple substances and compounds thereof into one class; (2) removing waste chemical reagent packaging materials through mechanical crushing or other pretreatment manners; (3) leaching the valuable metal by using an acid or alkali solution wet method at normal temperature or in a heating state, and adjusting the concentration of a leaching agent according to the pH value of the precipitation of the valuable metal to be extracted; and (4) precipitating, separating and drying to obtain a valuable metal compound, and then carrying out subsequent processing treatment according to the value or utilization way. Equipment used in the method is existing simple chemical reaction equipment, operation is convenient, no special process requirement exists, the content of the valuable metal in the raw materials is high, the extraction rate is high, the quality is stable, generated wastewater and waste residues enter a disposal workshop of the unit to be safely disposed, and the method is economical and environmentally friendly.
Owner:云南大地丰源环保有限公司
GaN transistor covered with nanopillar barrier and preparation method thereof
ActiveCN107978628APrevent breakdownImproved high-voltage operating characteristicsMaterial nanotechnologySemiconductor/solid-state device manufacturingGate leakage currentNanopillar
The invention discloses a GaN transistor covered with a nanopillar barrier and a preparation method thereof. AlxGa1-xN alloy nanopillars are distributed on the surface of the barrier layer of a transistor and correspond to screw dislocations in the barrier layer one to one. The method, by controlling the TMGa flow rate and the V / III ratio during the growth of AlxGa1-xN barrier, not only can avoidthe formation of V-shaped defects at the termination of screw dislocations, but also can form 1-3 nm AlxGa1-xN alloy nanopillars at the termination of screw dislocations. As the alloy nanopillars fillthe V-shaped defects at the termination of screw dislocations on the barrier surface and increase the effective barrier thickness at the termination of the screw dislocations, the gate leakage current is suppressed and the withstand voltage characteristic of the transistor is improved.
Owner:湖南三安半导体有限责任公司
Preparation method of high-free-flowing-property fluorine polymer-based safe environment-friendly firework propellant
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY +2
Preparation method of a composite energetic fragment with an outer metal matrix and an inner polymer matrix
The invention relates to a preparing method of a composite energetic fragment with a metal matrix on an outer layer and a polymer matrix on an inner layer, and belongs to the field of energetic materials and active fragment materials. Tungsten powder / zirconium powder is placed in a comprehensive planetary ball mill to be evenly mixed; uniform powder is placed in a customization mold, and pre-pressing molding and demolding are carried out; sintering is carried out, and a hollow cylindrical product A is obtained; aluminum powder, tungsten powder and polytetrafluoroethylene powder are placed in the comprehensive planetary ball mill to be evenly mixed, the hollow cylindrical product A is filled with uniform powder, and pre-pressing molding is carried out; and sintering is carried out, and a final product is obtained. The material serves as the energetic material and is very insensitive and safe under the static state, has certain toughness and strength and can be directly machined. Under the high-speed impact effect, violent explosion and combustion happen, and high heat high temperature is generated; and the material serves as the fragment material, high kinetic energy and high chemical energy released after impact explosion are used, and comprehensive damage of penetration, inner explosion, fire setting and overpressure of the target can be achieved.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Preparation method of high-explosion-heat synergistic energy-containing micro-projectile
PendingCN113582796ASimple processNo special process requirementsNon-explosive/non-thermic compositionsChemical physicsPhysical chemistry
The invention relates to a high-explosion-heat energy-containing micro-projectile, and belongs to the field of special damage. The energetic micro-projectile is composed of a fluoropolymer-based energetic micro-projectile basic formula and a high-explosion-heat reactant. The obtained product has the prominent characteristics that the effect of increasing the damage of explosion heat is achieved, the damage can be increased to 120%-200% of the damage of the original formula, and the product has the advantages of being free of sulfur and nitrogen, slight in smoke, high in explosion heat, high in safety and the like and can be widely applied to the fields of air anti-conduction, armor breaking damage and the like.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
A transistor based on an enhanced gate structure and its preparation method
ActiveCN104701363BConductiveReduce spontaneous thermal effectsSemiconductor/solid-state device manufacturingSemiconductor devicesHeating effectGallium nitride
The invention discloses a transistor based on an enhanced grid structure. The transistor comprises a substrate, a buffer layer, a GaN (gallium nitride) layer, a barrier layer, a source electrode, a drain electrode and a grid electrode, wherein the substrate, the buffer layer, the GaN layer and the barrier layer are sequentially stacked from bottom to top, the source electrode is arranged on an aluminum gallium nitride layer, the grid electrode is positioned between the source electrode and the drain electrode, and the barrier layer is AlGaN or InAlGaN, and the grid electrode is p-type Al1-xGaxN (0<=x<=1) or p-type In1-y-zGayAlzN (0<=y<=1; 0<=z<=1). A DLC (Diamond-like carbon) layer is arranged on the grid electrode, and the content of sp2 keys of DLC is higher than 50%. According to the transistor, enhanced operation is realized, the self-heating effect of a transistor device can be reduced by diamond-like carbon, and stability is improved. The invention further provides a preparation method of the transistor.
Owner:XIAMEN SANAN INTEGRATED CIRCUIT
A clean preparation method for hydrogenation catalyst carrier
ActiveCN104646070BEasy to prepareEasy to operateCatalyst carriersHydrocarbon oils treatmentOrganic acidSolubility
The invention relates to a clean preparation method for a hydrogenation catalyst carrier, comprising: preparing an organic acid solution; mixing the organic acid solution with an oxide precursor to prepare an adhesive; mixing the adhesive with catalyst carrier raw material powder, and then performing molding, drying, microwave treatment and roasting to obtain the catalyst carrier. Compared with the prior art, the present invention uses an organic acid as the peptizing acid in the preparation process of the catalyst carrier, improves the peptization by increasing the concentration of the organic acid, and ensures the strength of the catalyst carrier through a suitable carrier drying and roasting process to achieve clean production of catalyst supports.
Owner:CHINA PETROLEUM & CHEM CORP +1
Preparation method of secondary reaction type damage-enhanced energetic micro-projectile
PendingCN113527019ASimple processLow costBlasting cartridgesExplosive ingredient compoundingPhysicsChemistry
The invention relates to a secondary reaction type damage-enhanced energetic micro-projectile, and belongs to the field of new-concept damage energetic materials. The energetic material is composed of a fluoropolymer-based energetic micro-projectile basic formula and a secondary reaction type damage enhancer, and micro-nano carbon powder generated after a violent reaction of the fluoropolymer-based energetic micro-projectile is fully utilized by adjusting the variety and the particle size of the damage enhancer, so that the heat release of the reaction is further improved, and the secondary reaction is realized. The obtained product has the gains of enhancing damage, reducing carbon emission, improving the utilization rate of damage and the like, and has wide application prospects in the fields of air and missile defense, armor penetration killing and the like.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
A method for imitating ecological reproduction and healthy and efficient breeding of snakeheads
ActiveCN106172101BSelectiveSimplify the construction processClimate change adaptationPisciculture and aquariaChanna asiaticaGenetic stock
The invention relates to the technical field of special aquaculture, in particular to a method for imitating ecological reproduction and healthy and efficient breeding of snakeheads. Including breeding mud ditch construction, breeding mud pond construction, moon snakehead imitation ecological breeding and healthy and efficient breeding. The breeding process is: selection and cultivation of fish before March of the first year - natural pairing of fish breeding into production from April to August of the first year Spawning in mud ponds for egg cultivation - hatching and seed cultivation of fish eggs from May to September of the first year - seedlings are graded and put into breeding mud ponds for cultivation from June to October - adult fish start to market in January of the second year . From the structure of the Channa aquaculture facility, the adjustment of the culture water quality, the species of culture bait, the drugs for disease prevention and disinfection to the whole process of cultivation, it is basically in the state of ecological reproduction and healthy and efficient cultivation. The product quality is similar to that of the wild, especially suitable for industrialization. Demonstration piles wide.
Owner:龙南源头活水生态科技有限责任公司
Method for preparing polyphenylene sulfide fiber insulation paper
InactiveCN101949082BSimple processEase of industrial implementationNon-woven fabricsCardingRolling mill
The invention discloses a method for preparing polyphenylene sulfide fiber insulation paper. In the preparation method, 100 percent of polyphenylene sulfide fiber is adopted as a raw material, and is subjected to 2-3 pass opening, high-speed carding, vertically and horizontally 90-degree cross lapping, and a hot rolling process to be prepared into the polyphenylene sulfide fiber insulation paper.The length of the polyphenylene sulfide fiber is 20 to 78mm, and the fineness is 0.7 to 8.0dtex; the speed of the high-speed carding is 1,200 to 1,600m / min; and in the hot rolling process, a flat hotmill or a roller hot mill is used, when the roller hot mill is adopted, parameters are that: the hot rolling temperature is 240 to 282 DEG C, the roller speed is 2 to 20m / min, and the hot rolling pressure is 200 to 2,000N / cm, and when the flat hot mill is adopted, the parameters are that: the hot rolling temperature is 240 to 282 DEG C, the hot rolling pressure is 2 to 30MPa, the hot rolling timeis 10 to 50min, and the front and the back are respectively hot rolled once or twice.
Owner:TIANJIN POLYTECHNIC UNIV
A clean preparation method for hydrotreating catalyst carrier
ActiveCN104646071BEasy to prepareEasy to operateCatalyst carriersCatalyst activation/preparationOrganic acidMixed oxide
The invention relates to a method for preparing a catalyst carrier, comprising: preparing a mixed acid solution containing phosphoric acid and an organic acid; mixing the mixed acid solution with an oxide precursor to prepare a binder; the binder and the catalyst The carrier raw material powders are mixed, then shaped, dried and calcined to obtain the catalyst carrier. Compared with the prior art, the present invention provides a preparation method of the catalyst carrier, which solves the problem of polluting tail gas emission during the production process of the catalyst carrier by using the composite acid, and at the same time ensures the usability of the catalyst carrier.
Owner:CHINA PETROLEUM & CHEM CORP +1
Preparation method of safe and environment-friendly firework propellant powder based on self-sustaining reaction
PendingCN113582787ASimple processNo special process requirementsExplosive working-up apparatusFireworksMetal powder
The invention discloses a preparation method of safe and environment-friendly firework propellant powder based on self-sustaining reaction, and belongs to the technical field of fireworks and crackers. The safe and environment-friendly firework propellant powder is prepared from the following components in parts by weight: 30-75 parts of high-molecular fluorine polymer with the particle size of 50-400 microns; 25-70 parts of active metal powder with a particle size of 10-75 [mu]m; 0.5-3 parts of a silane coupling agent; and 0.5-5 parts of a binder. The preparation method adopts the processes of chemical modification, coating, powder mixing, granulation, drying and the like, and is simple in process, free of special process requirements, low in cost and convenient for batch production. According to the invention, the defects of high product pollution, high mechanical sensitivity, high static and spark sensitivity and low safety in the production and transportation process of the current black powder for fireworks and crackers can be overcome. The obtained product has the advantages of being free of sulfur and nitrogen, little in smoke, environmentally friendly, low in mechanical sensitivity, high in safety and the like, and can be widely applied to production of propellant powder for fireworks and crackers.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY +2
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