11results about How to "Controllable ratio" patented technology

The invention discloses a method for synthesizing main components of lavender essential oil in a directional proportion through mixed fermentation, and relates to the field of biosynthesis, and the method comprises the following steps: constructing linalool, linalyl acetate, lavandanol and lavandyl acetate strains, and testing products; and synthesizing the main component product of the lavender essential oil in a fermentation tank by using the constructed strain in a mixed bacteria mode. The invention provides a biological synthesis method of lavender essential oil which is natural, stable, controllable and high in purity, and main components of the lavender essential oil are close to those of real lavender essential oil.

The invention relates to the technical field of sodium ion battery positive electrode materials, and discloses a preparation method of a high-entropy sodium vanadium phosphate electrode, which comprises the following steps: step 1, adding 2.7 g of ammonium vanadate and 16.8 g of oxalic acid into 200 mL of deionized water, and stirring to react for 20-80 minutes at the temperature of 60-120 DEG C; 2, after slight cooling, 0.75 g of ferric nitrate, 0.81 g of manganese nitrate, 0.80 g of chromic nitrate, 0.58 g of cobalt nitrate and 0.49 g of nickel nitrate which are dissolved with 100 mL of deionized water are added; and step 3, after stirring, adding 8.3 g of sodium dihydrogen phosphate which is dissolved by 100mL of deionized water. The precursor is prepared by adopting a chemical synthesis method, and the high-entropy metal doped sodium vanadium phosphate positive electrode material is prepared by adopting a Joule thermal process. Compared with a traditional calcination process, the process has the advantages of high heating speed, low energy consumption, mild reaction conditions, high product purity, good particle size uniformity, easiness in control of the proportion of each component and the like, and continuous preparation can be realized.

The utility model provides a multifunctional shoulder sprayer. The multifunctional shoulder sprayer comprises a water inlet body, a switching assembly and a shell. The water inlet main body is provided with a water inlet channel, a mounting cavity and at least one water outlet channel, the water inlet end of the water inlet channel is provided with a water inlet joint, and the water outlet end of the water outlet channel is provided with a water outlet nozzle. The switching assembly is installed in the installation cavity, and the water inlet channel communicates with any water outlet channel through the switching action of the switching assembly. The shell wraps the water inlet body and is provided with a water inlet receding opening and a switching receding opening, the water inlet connector extends out of the water inlet receding opening, and a change-over switch of the switching assembly is exposed out of the switching receding opening. The shoulder sprayer provided by the utility model has various water outlet states, can meet the requirements of different users on water spray, and provides more comfortable shoulder shower experience for the users.

The invention discloses a preparation method and application of a high-entropy catalyst tellurium-selenium tungsten molybdenum sulfide, and belongs to the technical field of energy materials, the preparation method comprises the following steps: adding selenium powder into a hydrazine hydrate solution to form a solution A; dissolving sodium molybdate dihydrate, tungsten chloride and thiourea in the reduced graphene oxide suspension to form a mixed solution B; the solution A and the solution B are mixed together and stirred to obtain a solution C, and the solution C is transferred into a high-pressure kettle for a hydrothermal reaction; washing a product obtained by the reaction with deionized water, and freeze-drying after washing to obtain a black product A; and putting the product A at a leeward position of a tubular furnace, putting tellurium powder at a windward position of the tubular furnace, and performing annealing treatment in an argon-hydrogen environment to obtain the tellurium-selenium tungsten-molybdenum sulfide catalyst. According to the preparation method and application of the high-entropy catalyst tellurium selenium tungsten molybdenum sulfide, rapid transmission of electrons is facilitated, the transmission efficiency of ions and electrons is improved, and the dynamic performance of a battery is enhanced.

The invention discloses a preparation method of a zinc sulfide / titanium dioxide heterojunction nano material, and belongs to the field of nano catalytic materials. Titanium dioxide, a precursor of zinc, a precursor of sulfur, sodium chloride and / or potassium chloride are fully and uniformly stirred in a solution, then solvent heat treatment is performed, and after cooling, the zinc sulfide / titanium dioxide heterojunction nano material is obtained through ethanol and water washing. The method has the advantages of being simple, controllable, good in reproducibility, low in cost, suitable for industrial efficient production and the like.

The application relates to the technical field of electrochemical reduction, and discloses a preparation method and application of a catalyst for electro-reduction of nitro nitrogen into ammonia in high-salt wastewater, which comprises the following steps: (1) stirring and dissolving metal salts, a carbon source and a nitrogen source in an alcohol-water mixed solvent to obtain a precursor solution; wherein the metal salts are cobalt salts and copper salts, the Co:Cu molar ratio is 1-5:1, and the nitrogen source is a cyanamide-containing compound; (2) evaporating and crystallizing the precursor solution to obtain an organic metal salt; and (3) adding the organic metal salt into a dimethylimidazole-ethanol solution, performing ball milling treatment, and pyrolyzing in an inert atmosphere to obtain a nitrogen-doped carbon-based cobalt-copper bimetallic catalyst. The organic nitrogen and metal coordination are doped twice and anchored on the carbon matrix, the catalyst active sites and stability are effectively improved, the corrosion failure of the catalyst under the condition of high-salt wastewater is avoided, and efficient and stable reduction conversion of nitrate in high-salt wastewater is realized.

The application discloses a kind of preparation and application of g-C3N4 / VPO photothermal catalytic material, its characteristics are that g-C3N4 nanosheet is assembled with VPO nanosheet using electrostatic assembly strategy, and photothermal catalytic material of general formula g-C3N4 / VPO is obtained.Under photothermal condition, g-C3N4 / VPO is used as photothermal catalyst, and high-efficiency selective oxidation of n-butane is carried out to prepare maleic anhydride at low temperature.Compared with prior art, the application has the advantages of low reaction temperature, high selectivity, mild preparation conditions, large-scale preparation, green reaction, and wide application prospect.

The invention belongs to the technical field of functional fillers, and discloses a SiO2 / C composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing an edible fungus cultivation body with porous silicon dioxide to obtain a silicon dioxide composite edible fungus cultivation body; mixing the silicon dioxide composite edible mushroom culture body with edible mushrooms, and culturing the edible mushrooms; after culture is completed, the edible mushrooms are removed, and waste cultivated bodies are reserved; and carbonizing the waste cultivated body, and sequentially crushing and screening to obtain the SiO2 / C composite material. The SiO2 phase and the biomass carbon phase in the SiO2 / C composite material are uniformly distributed, and the SiO2 / C composite material has the characteristics of difficult agglomeration and good dispersibility, and is suitable for being used as a rubber functional filler; meanwhile, the low-heat-generation performance is good when the diphase functional filler is used as a rubber filler, and the defect that the low-heat-generation performance of an existing diphase functional filler is not solved is overcome.

The application provides a preparation method and application of a Pd-Ni composite metal oxide methane dry reforming catalyst. The application uses a palladium-nickel-based composite metal oxide catalyst with distributed active metals (Ni, Mg, Pd). The application applies the catalyst to a methane dry reforming reaction to prepare synthesis gas. The preparation method is simple. The proportion of each metal in the catalyst is adjustable and controllable, and the active metal nickel is uniformly distributed. Through relevant data processing and catalyst evaluation, it is confirmed that the catalyst has high catalytic activity, and has remarkable anti-coking and anti-sintering abilities. After 600 hours of stability test, the methane and carbon dioxide conversion rates are high and stable, and the H2 / CO ratio of the obtained synthesis gas is close to 1.

The utility model relates to a replaceable tool for installing a soft plug of a rubber tube, which comprises an installation platform (1), an installation groove (11) is arranged on the installation platform (1), one to two installation rods (2) can be arranged in the installation groove (11), and the installation rods (2) are matched with the rubber tube (3). The mounting rod (2) comprises a mounting head (21) and a rod body (22), and the mounting head (21) is matched with the mounting groove (11). Compared with the prior art, the piston mounting device can be replaced according to different sizes of rubber tubes, and can meet the mounting requirements of pistons of single-liquid and double-liquid mixed rubber tubes (in various proportions).

The utility model relates to a compressed gas foam generating device belongs to coal mine fire prevention technical field. The utility model discloses water inlet unit, jet mixing unit, static mixing unit, foaming unit and foam output unit are sequentially communicated along the medium flow direction. The utility model adopts three -level net -like foaming structure, and the gas -liquid contact and bubble dispersion effect are strengthened gradually, and the foam expansion multiple and stability have been improved significantly, the water pressure is changed through the adjustment water inlet valve, thereby the negative pressure intensity that jet nozzle produces is adjusted, realizes the quantitative inhalation of foaming agent, makes the ratio of water and foaming agent can be accurately controlled under different working conditions, through the liquid suction of jet nozzle negative pressure and the multiple disturbance effect of static helical spoiler, make water and foaming agent fully homogeneous mixture. The foam bubble particle size distribution of the utility model finally output is even, and the structure is compact, has higher expansion degree and covering performance, can be applied to mine fire prevention and disaster emergency disposal efficiently.