7results about How to "Avoid harsh conditions" patented technology

The invention provides a molybdenum-niobium-tungsten-oxygen fast-charging negative electrode material and a preparation method and application thereof.The preparation method includes the steps that a molybdenum source, a niobium source, a tungsten source and an organic solution are subjected to dehydration treatment to obtain an organic-inorganic mixed solid, and the molybdenum-niobium-tungsten-oxygen fast-charging negative electrode material and micron-sized secondary particles composed of nano-particles are prepared through a high-temperature calcination method. The conductivity and the ion diffusion rate are improved by utilizing a low-crystallinity crystal structure, the capacity retention rate is 87% after 2000 cycles at the high rate of 50C, and meanwhile, the problem of low compaction density of nanoparticles is avoided. The method is simple in process, low in energy consumption and loose in preparation condition, avoids harsh conditions, and has practical application value.

The invention provides multi-anion hybridized amorphous bone meal and a preparation method thereof. The bone meal is structurally characterized in that the bone meal is in an amorphous state, cations in chemical composition of the bone meal are Ca < 2 + >, anions are PO4 < 3->, C6H5O7 < 3-> and SiO3 < 2->, the composition general formula of the bone meal is Ca5 [(PO4) 3-x-y (C6H5O7) x (SiO3) 1.5 y (OH)], x is larger than or equal to 0.25 and smaller than or equal to 0.50, and y is larger than or equal to 0.05 and smaller than or equal to 0.75. The method for preparing the bone meal comprises the following steps: by taking soluble calcium salt, citrate, a phosphate solution and silicate as raw materials, co-precipitating, washing and freeze-drying by controlling process conditions such as an alcohol-water solution environment, a dropwise adding mode, a reaction temperature, a pH value and the like. The bone meal is convenient to store, has relatively high mineralization activity, good biocompatibility, degradability and angiogenesis promoting function, has a good bone regeneration promoting effect, and is an excellent bone repair material.

This invention discloses a method for the direct oxidative carbonylation of methane to prepare acetic acid. Specifically, this invention provides a catalytic method for the preparation of acetic acid from methane, comprising the following steps: under solvent conditions, in the presence of light, an iron catalyst, chloride ions, and an oxidant, methane and carbon monoxide undergo a methane oxidative carbonylation reaction to obtain acetic acid. This method utilizes readily available methane, carbon monoxide, and air (or oxygen), employs an iron catalyst, and achieves direct, efficient, and highly selective acetic acid production via a one-step photocatalytic reaction, demonstrating promising application prospects. The substrate scope of this invention is broad, applicable to a range of chain and cyclic alkanes.

The invention discloses a preparation method of 2-methyl-4-aminoquinoline, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps: by taking 2-methylquinoline as a raw material, carrying out nitrogen oxidation reaction under the action of 3-chloroperoxybenzoic acid (mCPBA) without purification; then carrying out nitration reaction in iron nitrate nonahydrate and isopropanol; then, under the tetrahydroxy diboron / alkaline condition, 2-methyl-4-aminoquinoline is generated through reduction. Easily available 2-methylquinoline is adopted as a raw material, nitrogen oxidation is performed, a ferric nitrate nitration system is adopted, and finally amino is introduced through reduction, so that harsh conditions in a traditional method are avoided, the route is simple and efficient, product separation and purification are simple, and the method is suitable for being carried out under industrial amplification conditions.

The present invention provides a method for recovering tungsten and molybdenum from tungsten smelting molybdenum removal slag, and relates to the field of comprehensive utilization of tungsten and molybdenum waste. The present invention provides a method for recovering tungsten and molybdenum from tungsten smelting molybdenum removal slag, comprising the following steps: oxidative roasting the molybdenum removal slag to obtain oxidized molybdenum removal slag; mixing the oxidized molybdenum removal slag with a reducing agent, a slag forming agent, and an iron source, and then reducing and smelting to obtain a tungsten-molybdenum-iron alloy. The recovery method of the present invention is suitable for recovering tungsten and molybdenum from molybdenum removal slag, and the recovery rate of tungsten and molybdenum is more than 95%.

This invention discloses a matte aluminum alloy sealing agent and its sealing process. The matte aluminum alloy sealing agent comprises the following raw materials by weight: 60-80 parts of polyethylene acrylic acid with a grafting rate of 18-22; 10-15 parts of diluent; 15-20 parts of filler; 1-2 parts of film-forming aid; and 120-145 parts of deionized water. The matte aluminum alloy sealing agent not only improves the corrosion resistance of the aluminum alloy, but also, to achieve a decorative appearance, gives the treated aluminum alloy surface a matte luster, resulting in a luxurious and textured surface.

The invention provides a method for preparing a Cu / CuO nanosheet bundle through hydrothermal reduction, which comprises the following steps: dissolving copper salt in water to prepare a precursor solution A; dissolving a reducing agent in water to prepare a solution B; the molar ratio of the reducing agent to the copper salt is 1: (2-6); stirring the solution B, carrying out stepped heating to 60-120 DEG C, carrying out supercooling, dropwise adding the precursor solution A, carrying out a reaction for 20-40 min, adjusting the pH value of the solution to 13-14, adding a macromolecular chain organic matter stabilizer aqueous solution, and carrying out a superimposed ultrasonic reaction at 60-120 DEG C for 5-30 min; when the mixed solution is changed from dark blue to green and then to black red, rapidly cooling to room temperature to obtain a turbid liquid; and separating, cleaning and drying the turbid liquid. According to the technical scheme, the Cu / CuO nanosheet bundle with the uniform size and the controllable morphology can be rapidly prepared at the low temperature, the process cost is low, and the efficiency is high.