931results about How to "Meet the needs of industrial production" patented technology

The invention discloses a preparation method of active carbon. The preparation method comprises following steps: (1), raw material carbon, activating agent KOH, and an assistant activator are mixed at a weight ratio of 1:1-7:0.001-0.1; (2) an obtained mixture is subjected to drying and dewatering at 200 to 300 DEG C for 1 to 3h, is heated to an activation temperature of 600 to 850 DEG C at a heating speed of 1 to 7 DEG C / min with protection of inert gas under vacuum or high pressure conditions, and activation is carried out for 1 to 4h; (3), an obtained activated material is cooled to a temperature lower than 100 DEG C with protection of inert gas, is washed with water for 3 to 4 times, is washed with hydrochloric acid for 1 to 2 times, is washed with water until pH of an obtained filtrate reaches 6 to 7, and an obtained product is dried at 120-150 DEG C until weight is constant so as to obtain active carbon products. According to the preparation method, KOH is taken as an activating agent; and the preparation method is safe and reliable, is convenient for controlling, and is capable of satisfying demands of industrial production.

The present invention discloses a polyaniline / polyacrylonitrile composite conductive fibre and its preparation method. Its preparation method includes the following steps: firstly, preparing soluble polyaniline doped by organic sulfonic acid, then using solvent to dissolve the organic sulfonate of polyaniline and polyacrylonitrile; adopting wet spinning technology to press the mixed solution through spinning nozzle, and extruding the mixed solution into the coagulating bath, drawing and washing with water so as to obtain the invented composite conductive fibre. The electric conductivity of said fibre can be controlled in the range of 10(-7)-10(-1)(S / cm), and said fibre has good strength, generally it is 1.5CN / dtex-3.4 / detex, can be used for making electromagnetic shielding material and anti-static material.

The invention relates to a stable nanometer silver colloidal sol and a preparation method thereof. The stable nanometer silver colloidal sol adopts a silver containing compound, a protective agent and a solvent, water is used as the solvent, and the silver containing compound, the protective agent and the water are mixed so as to prepare the colloidal sol; and the particle diameters of nanometer silver grains are 1nm-10nm, and the nanometer silver grains are uniformly distributed in the colloidal sol, and can be preserved for 6 months to 24 months without changing at room temperature. The preparation method provided by the invention comprises the following steps of: adopting the silver containing compound and the protective agent as raw materials, adopting the water as the solvent, mixing the silver containing compound, the protective agent and the water so as to form a mixed solution which contains 200-10000ppm of silver, 0.02%-1% of protective agent, and the balance of water according to weight percent; and dissolving and mixing the components when the stable nanometer silver colloidal sol is prepared, then uniformly stirring, conducting ultrasonic processing, using a light source containing ultraviolet rays to light 30 minutes to 24 hours to obtain the nanometer silver colloidal sol containing the nanometer silver grains. The stable nanometer silver colloidal sol and the preparation method thereof provided by the invention have the advantages that the cost is low, the process is simple, and the stable nanometer silver colloidal sol is suitable for large-scale preparation.

The invention discloses an oxide nanowire-MOF derivative / S composite positive electrode material and a preparation method therefor, and belongs to the fields of a lithium-sulfur battery positive electrode material and a preparation method therefor. According to the positive electrode material, the effects of PVP, SDS, PVA, NPAM and other surfactants are utilized; next, by taking metal oxide nanowires as the substrate, imidazole, an organic solvent and metal salt are added, and then, standing and hydrothermal and solvothermal methods are preformed to prepare an oxide nanowire / ZIF-system MOFs tomatoes-on-sticks-shaped composite material to be used as a precursor; and then the precursor is subjected to carbonization treatment, and next, sulfur fixation is carried out by the carbonized product so as to obtain the oxide nanowire-MOF derivative / S composite positive electrode material. The carbonized product has relatively large specific surface area and relatively high conductivity, so that the carbonized product is very suitable for sulfur fixation; and in addition, the composite positive electrode material and the preparation method therefor are relatively high in cycling stability and capacity, and have simple preparation and easily available raw materials, so that the advantages of accelerating commercialization of the lithium-sulfur battery and the like, as well as quite high potential value are achieved.

The invention discloses a preparation method of cefprozil, which comprises: 7-amin cethalosporanic acid (7-ACA) reacts with triphenyl phosphine to get 7- trimethylsilyl amino-3-triphenyl phosphate methylene-4-cethalosporanic acid trimethylsilyl ester through silanization protection and iodination reagent replacing under the condition of catalyst existing; WITTIG reaction is made for the product and acetaldehyde to get 7-trimethylsilyl amino -3-(propenyl-1-alkenyl)-4-cethalosporanic acidtrimethylsilyl ester; then the compound reacts with D-para hydroxybenzene glycine dane potassium salt to geta compound (6R, 7R)-7-[(2R)-2- ethoxycarbonyl-1-methyl - ethylene amino (4-trimethylsilyl oxyphenyl) acetamido group(amide)]-8-oxo-3- (1- propenyl)-5-thio-1- heterobicycle [4.2.0] octylene-2-ene-2-carboxylic acid trimethylsilyl ester; hydrolytic treatment is then used to get the cefprozil. The invent adopts the method of one pot and can participate in next reaction without separating intermediateproducts. The preparation method of cefprozil has the advantages of low cost, convenient operation and high overall yield, adapting to demands of industrial production.

The invention discloses a fresh-cut lotus browning inhibitor and a preparation method and application thereof, and belongs to the technical field of fresh-cut root vegetable production. The fresh-cut lotus browning inhibitor is characterized in that the fresh-cut lotus browning inhibitor is prepared from food additives such as L-cysteine, ascorbic acid and citric acid and water; and fresh-cut lotus roots are soaked in the inhibitor solution for 8 to 15 minutes, packaged, and can be stored at the temperature of between 4 and 5DEG C for 10 days. The browning inhibitor can keep the original color of the fresh-cut lotus roots, and has the effect equivalent to sulfite; meanwhile, the inhibitor does not contain components harmful to human bodies such as the sulfite, the inhibitor is safe to use.

The invention relates to a method for removing sour taste of Peru squid, which comprises the following steps: selecting fresh Peru squid as the raw material, freezing and then unfreezing to the half-unfreezing state, removing the head, the feet and the skin, and cutting the squid body into strips; preparing an ice-water soaking solution formed by table salt and a compound reagent comprising sodiumcarbonate, sodium bicarbonate and compound phosphates; soaking the prepared squid body strips in the ice-water soaking solution; and taking out, and rinsing in a 0.4-1% citric acid ice-water solutionso as to remove the sour taste of the Peru squid. The concentration of the table salt in the ice-water soaking solution is 1-3%, and the concentration of the compound reagent is 2-4%. The proportionof the sodium carbonate to the sodium bicarbonate to the compound phosphates in the compound reagent is 1:1:0.4. The method has the advantages of simple technique, easy obtainment of raw material, lowcost and high yield of finished products, and can completely remove the sour taste.

The invention provides silicon-free amino acid shampoo. The silicon-free amino acid shampoo does not contain siliceous substances; the silicon-free amino acid shampoo mainly comprises the following components in percentages by weight: 5-30% of fatty acyl monosodium glutamate, 10-20% of fatty acyl alanine sodium, 5-20% of an ampholytic surfactant, 1-10% of a cosurfactant, 0.5-5% of a conditioner, 0.5-10% of an auxiliary agent, and 30-60% of water. The silicon-free amino acid shampoo has good self-thickening performance, extra thickening agents are not needed, and production cost is reduced; theproduct has good foaming capability, good foam stabilizer, and abundant foam; the product does not have irritation for skin, and does not contain siliceous substances, sulfate and dioxane, so that the product does not harm body health. The invention also provides a preparation method of the silicon-free amino acid shampoo. The method has simple steps and easy operation, and can satisfy industrialproduction demands.

The invention provides a Ga-doped InP quantum dot with a core-shell structure and a preparation method of the Ga-doped InP quantum dot. The quantum dot comprises an InP nano-crystal core, a Ga-doped InGaP nanocrystalline middle layer and a shell layer, wherein the constitution of the Ga-doped InGaP nanocrystalline middle layer is InxGayP, and the constitution of the shell layer is ZnSezS(1-z), x / yis more than or equal to 1 and less than or equal to 9, and z is more than or equal to 0 and less than or equal to 1. The fluorescent emission wavelength of the quantum dot is continuous and adjustable in 610nm-780nm, particle sizes are uniform, and the half band width of an emission peak is obviously smaller than that of a pure InP quantum dot with the same wavelength. PH3 is taken as a phosphorus source, and the Ga-doped InGaP nanocrystalline middle layer is formed between the nano-crystal core and the shell layer, so that the defects caused due to the mispairing of crystal lattices of theInP quantum dot are relieved; and the Ga-doped InP quantum dot has the characteristics of low cost, environmental friendliness and simplicity in operation and can be widely applied to the fields of illumination, display and the like.

The present invention provides a methyl acetate production method, which comprises that dimethyl ether and raw material gas containing carbon monoxide and hydrogen are subjected to a carbonylation reaction on a catalyst having an acid EMT structure zeolite molecular sieve to obtain the methyl acetate. The invention provides the new methyl acetate production method, wherein the method is performed in the presence of the acid EMT zeolite molecular sieve of the catalyst, such that the reaction activity is high, the stability can be significantly improved, and the industrial production requirements can be met.

The invention relates to a preparation method of an aptamer affinity column having the advantages of simple operation, fast coupling speed and high coupling efficiency, and the aptamer affinity column is prepared from NHS activated sephrose4FF as a carrier and ochratoxin A specific aptamer as a ligand. After systematical review, the affinity column has good applicability in traditional Chinese medicines, and can achieve the purpose of rapid purification of the ochratoxin A in the traditional Chinese medicines, the established detection method is good in accurate degree and high in sensitivity, and can be used for rapid screening of the ochratoxin A in the traditional Chinese medicines. In addition, the preparation method of the aptamer affinity column is simple, easy, low in production cost, and stable and controllable in quality, can meet the rapid detection of the ochratoxin A in the traditional Chinese medicines, and has broad development prospects.

The invention discloses a hydroponic growing method of anoectochilus roburghii. The hydroponic growing method comprises the steps of washing anoectochilus roburghii tissue culture bottle seedlings; transferring to a hydroponic device for culturing; placing the anoectochilus roburghii tissue culture seedlings into a culture bed on the hydroponic device; and only soaking roots into a culture solution, wherein hydroponic growing is divided into two stages: in the first stage, the anoectochilus roburghii is darkly cultured for 15 days at the room temperature of 27 + / -2 DEG C and the humidity of 80%-90%; in the second stage: the anoectochilus roburghii is brightly cultured for 75 days at the room temperature of 27 + / -2 DEG C and the humidity of 80%-90%, the illumination of the anoectochilus roburghii lasts for 9 hours per day and the illumination intensity is 1,700-2,000 Lux. By using the hydroponic growing method, the survival rate can be increased, and the culturing time can be shortened so as to realize industrial planting.