54results about How to "Less harsh" patented technology

The invention relates to a silver nanowire preparation method which comprises the following steps: (a), taking polyvinylpyrrolidone, dissolving polyvinylpyrrolidone in ethylene glycol; (b), taking silver nitrate, and dissolving silver nitrate in ethylene glycol; (c), taking ferric chloride anhydrous and dissolving ferric chloride anhydrous in ethylene glycol; (d), mixing the silver nitrate-ethylene glycol solution with the polyvinylpyrrolidone-ethylene glycol solution to obtain a first mixed solution, wherein the mass ratio of polyvinylpyrrolidone to silver nitrate is 1-9 to 1; (e), respectively adding a ferric trichloride-ethylene glycol solution and an ionic liquid-ethylene glycol solution in the first mixed solution, and reacting for 2-24 hours at a temperature lower than the boiling temperature of ethylene glycol after stirring and mixing to obtain a shiny white mixed solution; (f), flushing silver nanowires obtained after solid-liquid separation with acetone, and dispersing the silver nanowires in water or absolute ethyl alcohol to obtain a nanowire dispersion liquid, wherein the step (a), the step (b) and the step (c) are not ordered. The average ratio of length and diameter of the silver nanowire is greater than 1,000.

A hair wrap envelopes the hair. The hair wrap comprises a cap portion, a pouch, and side walls. The cap portion has at least one attachment means. At least two elongated ties located on opposite sides of the side walls are adapted to be twisted for securing the wrap on the user's head. A material loop is located on a back base of the pouch to hold the ties in place. An attachment means located on a bottom edge of the pouch mates with the attachment means of the cap portion. A crown material loop located on the top section is adapted to hold the pouch after the pouch is twisted and lifted toward the top section. The pouch is adapted to be worn in a variety of styles, including to lay untwisted when the wrap is in an extended position, and twisted and lifted upward when the wrap is in a wrapped position.

The invention pertains to a method for fluorometrically monitoring a Clean-In-Place (“CIP”) system and for fluorometrically monitoring the dosage of chemical added to the CIP system. Monitoring of the said CIP system can be based upon fluormetrically monitoring the fluorescent tracer, chemical or both, which are added to the CIP system.

The invention relates to sulfur-tolerant low-carbon alcohol catalyst which has the expression of MC-M1-M2. The sulfur-tolerant low-carbon alcohol catalyst takes the M metal carbide as the active component, and M1 metal element and M2 metal element are added to the M metal carbide so as to be used as the auxiliary agents. The molar ratio of the M1 to the M2 to the M is 0.01-0.5:0.1-1:1. The M is one or some of the Mo, the W and the V, the M1 is one or some of the Fe, the Co, the Ni, the Cr, the Mn, the La, the Y and the Ce, and the M2 is one or some of the K, the Na, the Be and the Mg. The sulfur-tolerant low-carbon alcohol catalyst has the advantages of good sulfur tolerance, good stability and high activity.

The invention discloses a decentralized type rapid dewatering and residual water purification system and method for river bottom mud. The system comprises coagulation chemical feeding equipment, a pipeline mixer, soil engineering tube bags, a dewatering field, a residual water adjusting tank and an integrated sewage treatment unit. Conditioning of dredging bottom mud by a coagulant is realized through the pipeline mixer, then, the bottom mud is pumped into the soil engineering tube bags and rapidly dewatered by the aid of the water permeable and mud non-permeable characteristics of the soil engineering tube bags, and produced residual water enters the adjusting tank through drain pipes arranged in the dewatering field and enters the integrated sewage treatment unit for purification treatment after being conditioned. As for the decentralized river dredging engineering, rapid dewatering and residual water purification of river dredging bottom mud with different properties are realized through flexible combination of the soil engineering tube bags and an integrated sewage treatment system.

The embodiment of the invention provides a preparation method for a platinum-copper alloy nano particle. The preparation method comprises the following steps: (1) preparing a mixed aqueous solution containing chloroplatinate and a soluble copper salt; and (2) adding a reducing agent into the mixed aqueous solution, and carrying out stirring reaction for 1-3 hours in a water bath of 60-90 DEG C; after the reaction is completed, centrifuging a solution obtained by reaction, removing liquid supernatant to obtain a solid product, and washing the solid product, thereby obtaining the platinum-copper alloy nano particle. The preparation method does not need to use a surfactant, is simple in process, gentle in reaction condition, relatively short in reaction time and low in cost; and the obtained platinum-copper alloy nano particle is clean in surface, very uniform in dimension size, good in monodispersity and high in catalytic activity. The embodiment of the invention further provides the platinum-copper alloy nano particle prepared by the preparation method.

The invention discloses an anthracene oil hydrogenation method. The method comprises the following steps of: hydrogenating and refining anthracene oil, and then carrying out gas and liquid separation through a hot high-pressure separator and a hot low-pressure separator, wherein obtained hot low-fraction oil is partially circulated back to a hydrogenating and refining reaction region to be mixed with the anthracene oil, and residual partial hot low-fraction oil is led to a hydrogenating and cracking reaction region; leading a hydrogenating and cracking product and gas separated from the hot high-pressure separator enter a cold high-pressure separator, and leading separated liquid and gas separated from the hot low-pressure separator enter a cold low-pressure separator; and carrying out steam stripping on separated liquid and then leading the liquid to a fractionating column to obtain gasoline and diesel oil fractions. The method is favorable for reducing the temperature rise of the device, reducing the equipment investment and improving the operation safety and stability of the device, and meanwhile, because the concentrations of colloid and asphalt in raw materials are reduced, the running period of the device can be prolonged.

The invention discloses a supported sulfur-resistant low-carbon alcohol catalyst, which is expressed as MC-M1-M2/S, wherein the carbide of a metal M is used as an active ingredient; metals M1 and M2 are used as assistants; the active ingredient of the catalyst is supported by an oxide carrier S; the M supporting capacity of the carrier is 15 to 50 weight percent based on the weight of S; the molar ratio of the M1 to M2 to M is 0.01-0.5:0.1-1:1; M is one or more of Mo, W, and V; M1 is one or more of Fe, Co, Ni, Cr, Mn, La, Y and Ce; M2 is one or more of K, Na, Be and Mg; and S is one or more of SiO2, ZrO2, Al2O3, MgO and TiO2. The catalyst has the advantages of high sulfur resistance, high stability, high activity, high C2+ alcohol selectivity and long service life.

The invention discloses a circuit-T grid preparing method of high-electron mobility transistor, which comprises the following steps: preparing primitive substrate; cleaning; marking; preparing separation island; evaporating source-drain metal; stripping; alloying; cleaning the substrate; coating PMMA glue; baking; fetching the substrate; exposing the glued substrate through electron beam; developing PMMA glue on the substrate; fixing image; blowing. The method is compatible with advantages of present two T-typed grid preparing method, which avoids each defect simultaneously.

The invention discloses an anti-greening PE (Polyethylene) transparent primer. The anti-greening PE (Polyethylene) transparent primer comprises the following components according to the percentage content: 50-80% of unsaturated resin, 0-1% of polymerization inhibitor, 0.1-1% of deforming agent, 0.1-0.5% of wetting dispersion agent, 0.1-0.6% of anti-settling agent, 0-6% of zinc powder, 0-30% of transparent powder, 0-5% of talcum powder, 0.1-1.3% of flatting agent and 0-5% of solvent. Simultaneously, the invention also discloses a preparation method of the anti-greening PE transparent primer. The anti-greening PE (Polyethylene) transparent primer prepared by using the components according to the preparation method effectively solves the greening phenomenon of the PE paint film of the prior art, takes on light red, and is close to a base material in color; and the transparency of the paint film of the transparent primer is increased.

The present invention provides a method for producing lightweight fuel oil by hydrogenation of deep drawn anthracene oil. The method comprises the following steps: hydrofinishing deep drawn anthracene oil; returning part of the liquid phase products obtained by gas-liquid separation to the hydrofinishing reaction zone and mixing with anthracene oil; adding the residual products into a hydrocracking reaction zone, conducting contact reaction with hydrobon catalysts, hydrogenation charcoal-removing catalysts and hydracracking catalysts successively; separating the obtained hydrocracking products; to obtain the fractions of gasoline and diesel oil. The method not only can process deep drawn anthracene oil, broadens the scope of raw materials; but also can maximize the conversion of deep drawing anthracene oil, thereby, improves the yield of lightweight fuel oil, raises the added value of anthracene oil, effectively protects the activity of hydrocracking catalysts simultaneously, and guarantees the long-time cycle running of a device. Furthermore, adopting the mode of portion cycle is favorable to reducing temperature rise, reducing equipment investment and enhancing safety and smoothness of device operation; simultaneously, reduction of the concentration of colloid and asphalt is in favor of prolongation of the running period of the device.

The invention relates to all-solid-state laser application technology field, in particular relates to a double-wavelength comprehensive pumped compact laser system. To provide an all-solid-state laser with lower heat quality, high efficiency, high beam quality and more stabile operation characteristic, the invention provides a technical scheme that the double-wavelength comprehensive pumped compact laser system is used as a cavity mirror of pumped source double-wavelength laser projected to a laser resonant cavity via focusing lens, a laser gain medium is set between the cavity mirror and another cavity mirror of the laser resonant cavity, another cavity mirror outputs laser, oscillation beam waist radius of laser resonant cavity equals to or slightly larger than pumped beam waist radius. The system provided by the invention is main used for manufacturing laser with high power, all-solid, compact structure, small volume, lower power dissipation and low cost.

The invention discloses a vehicle-mounted autonomous charging platform for an unmanned aerial vehicle, belonging to the technical field of unmanned aerial vehicles. The vehicle-mounted autonomous charging platform comprises a roof hangar, a take-off and landing boss and a quad-rotor unmanned aerial vehicle which are mounted in the roof hangar, and a charging interface device matched with the unmanned aerial vehicle and the take-off and landing boss, wherein an electromagnet array is arranged at the bottom of the take-off and landing boss and used for tightly adsorbing landing legs of the unmanned aerial vehicle; and the unmanned aerial vehicle comprises a controller, the controller is divided into a position controller and an attitude controller, and position stabilization and attitude stabilization of the unmanned aerial vehicle are respectively controlled by calculating resultant external force and resultant external torque generated by the unmanned aerial vehicle. The autonomous charging platform is further provided with a circuit system; when the unmanned aerial vehicle is charged, the controller measures voltage every 0.1 s, on-off information of a charging circuit is indirectly obtained, and if the charging circuit is disconnected, the controller controls the unmanned aerial vehicle to adjust posture again until the charging circuit is closed again to continue charging. According to the invention, a requirement on the pose accuracy of the unmanned aerial vehicle is reduced, and the robustness and success rate of autonomous landing are improved.

The invention relates to an iron alkali composite catalyst for direct liquefaction of coal. The catalyst can be a loaded type or a mixed type. The loaded catalyst is prepared by loading an iron active component and an alkali active component on the surface of coal particles through chemical reactions. The mass ratio of water to dry coal powder is (0.5-5):1. The mass ratio of iron atoms in the iron salt solution to dry coal powder is (0.1-0.5):1. The mole ratio of additive to iron atoms in the iron salt solution is (0-0.1):1. The mole ration of alkaline metal atoms in the alkali solution to iron atoms in the iron salt solution is (0.001-5):1. The mixed type catalyst is prepared by directly mixing iron containing substances and alkali containing substances, wherein the mole ratio of alkaline metal atoms to iron atoms is (0.001-5):1. The catalyst is suitable for direct liquefaction of coals in different systems and is capable of prominently improving the coal conversion rate and yield of oil. Moreover, the raw materials are cheap and easily available. The preparation is simple. The catalyst has a very good application prospect.

The invention relates to the field of preparation of fruit juice powder or medicinal materials, and particularly relates to a method for preparing seabuckthorn powder including all functional ingredients of seabuckthorn juice such as seabuckthorn berry oil, flavones and vitamin C (Vc). The method comprises the steps of: firstly, adding pectinase to seabuckthorn juice to process; adding 5-10% of cyclodextrsin derivatives, performing high-pressure homogenization; concentrating at reduced pressure at the temperature below 60 DEG C until the relative density is 1.05-1.35; finally adding maltodextrin to blend the content of juice solids to 30-50 degrees of BX in concentrated juice, and performing spray-drying to form powder. A plurality of nutritional ingredients are reserved by the seabuckthorn powder prepared by the method; the original flavor of the seabuckthorn is still kept after blending; meanwhile, the solution is good in clarity.

The invention belongs to the technical field of semiconductors, and relates to a method for growing gallium nitride material on a sapphire substrate, the grown gallium nitride material and application thereof. A first metal organic matter is piped into a reaction chamber in the process of heating the sapphire substrate so as to realize the effects that the oxygen atoms on the surface of the sapphire are enabled to be desorbed and metal atoms are deposited on the surface of the sapphire, and then gallium nitride is grown on the sapphire substrate so as to acquire the high-quality gallium nitride material. Compared with the gallium nitride material obtained through the conventional method, the half-peak width of the XRD (002) diffraction surface and the (102) diffraction surface of the grown gallium nitride material can be reduced for 10-80 arc seconds and 30-110 arc seconds respectively. Meanwhile, the process window of multiple subsequent steps of the gallium nitride material growth process can be increased by the method so that the method has wide application prospect.

The invention belongs to the technical field of coalification industry and particularly relates to an anthracene oil hydrogenation method. The anthracene oil hydrogenation method comprises the following steps that after anthracene oil hydrofining, separation is performed through a hot high-pressure separator, a liquid-phase product enters a hot low-pressure separator, and hot low-fraction oil is partially circulated to a hydrofining reactor; the residual hot low-fraction oil enters a hydrocracking reactor to obtain a hydrocracking product, the hydrocracking product and gas separated from the hot high-pressure separator enter a cold high-pressure separator, the liquid separated from the hot high-pressure separator and gas separated from the hot low-pressure separator enter a cold low-pressure separator for further gas-liquid separation, cold low-fraction oil separated from the cold low-pressure separator is partially circulated to the hydrofining reactor; fractionation is conducted on the residual cold low-fraction oil to obtain various products and tail oil. The method is small in temperature rise at a refining stage and stable in operation, can not only used for production of light gasoline and diesel products through anthracene oil hydrogenation, makes the devices safe and stable in operation and prolongs the operating cycle of the devices.

The invention provides a preparation method of a tobacco spice. The spice is prepared from fenchol prepared from Cinnamomum camphora essential oil by being matched with a cabbage mustard extract, a Yunyan tobacco extract and a licorice root fluid extract. The fenchol is obtained in the mode that sodium alginate and an amino acid functionalized ionic liquid catalyst are subjected to catalysis, alpha-pinene esterification, hydration and then fractionation preparation. The obtained fenchol has the fresh Cinnamomum camphora aroma, meanwhile, irritation of the smoke smell can be reduced, the fullness of the smoke smell is improved, and the flavor is improved. The raw material source is wide, the process is simple, and the prepared tobacco spice has very high added value.