32results about How to "Fully participate in the response" patented technology

The invention relates to a method for connecting a nickel-based superalloy with a Ti2AlNb alloy or a Ti3Al-based alloy, in particular to a diffusion welding connecting method adopting Cu foil and Ti foil as a composite interlayer. The diffusion welding connecting method comprises the steps that the nickel-based superalloy and the Ti2AlNb alloy or the Ti3Al-based alloy are processed into the neededsizes, ground and polished; the Cu foil and the Ti foil are subjected to oxidation film removing, and are placed into acetone with a welded base material to be subjected to ultrasonic cleaning; and the Cu foil makes contact with the nickel-based superalloy, the Ti foil makes contact with the Ti2AlNb alloy or the Ti3Al-based alloy, and thus a welded test piece with the structure of the Ti2AlNb alloy or the Ti3Al-based alloy/the Ti foil/ the Cu foil/ the nickel-based superalloy is obtained, a welded workpiece is placed into a vacuum heating furnace, the pressure is applied, and welding is completed after heating, heat preservation and cooling heat circulating. The welding temperature can be lowered, forming of a brittle phase of a joint is controlled, and the property of the joint is improved; and the obtained shearing strength of the joint at the room temperature reaches 240-310 MPa.

The invention discloses a preparation method of M6C type alloy carbide Fe3W3C and belongs to the technical field of new materials. The method comprises the steps that Fe powder and WC powder are used as raw materials, and after the raw materials are uniformed mixed, sintering is conducted through a spark plasma sintering (SPS) and vacuum interface remelting method; then, after an obtained sintering sample is crushed, phase analysis is conducted; other impurity phases are removed through an acid pickling method, and deacidification treatment, drying treatment and the like are conducted on the powder; and then, sintering is conducted on the powder, so that a ternary carbide Fe3W3C material is finally obtained. The ternary phase carbide Fe3W3C prepared through the method contains few impurities; in addition, the preparation temperature is low; an obtained structure is uniform and good in mechanical performance; and great significance is achieved for researching microcosmic interfaces of tungsten-carbide-reinforced-steel (iron)-based composites.

The invention provides a medicine for repairing skin injuries and a preparation method thereof. The medicine is prepared from, by weight, 0.01-0.1 part of menthol, 0.01-0.1 part of borneol, 1-5 parts of trehalose, 1-5 parts of niacinamide, 0.1-2 parts of D-panthenol, 0.1-0.3 part of sodium hyaluronate, 1-5 parts of hydroxyethyl cellulose and 82-97 parts of water. The preparation method includes the steps that water, menthol, borneol, trehalose, niacinamide, sodium hyaluronate and hydroxyethyl cellulose are mixed and heated, then the mixture is cooled, D-panthenol is added, and the medicine is obtained after mixing. According to the medicine, due to the fact that menthol, borneol, trehalose, niacinamide and D-panthenol are used for compatibility according to scientific matching, the components have a positive synergistic effect, the medicine can relieve swelling and pain and has the relieving and calming effect, a layer of breathable protective film is formed on the surface of injured skin, the outside world is prevented from stimulating the injured skin, and therefore the injured skin can be fast repaired.

The invention relates to a chemical reaction device for fully recycling a gas raw material. The chemical reaction device is characterized by comprising a reactor, two cooling devices, two anti-siphon bubbling devices and two nitrogen bubbling devices, wherein the cooling devices are connected with the reactor through two gas pipes which are provided with pipe clamps; the cooling devices are connected with the anti-siphon bubbling devices through a gas pipe, and a three-way valve is connected on the gas pipe between the cooling devices and the anti-siphon bubbling devices; and the nitrogen bubbling devices are connected on the three-way valve. The chemical reaction device has the advantages of convenient operation, capabilities of recycling the gas raw material and making the gas raw material fully participate in the reaction, and furthest reduction of the use cost of the gas raw material.

The invention belongs to the technical field of pharmacy, and particularly relates to a process for producing pharmaceutical auxiliary material hydroxypropyl methylcellulose through a slurry process. The process comprises the following steps of: blending; reacting; desolventizing; washing; drying; packaging. By adopting the process, the single batch output of the hydroxypropyl methylcellulose is increased, and the single batch output is increased nearly twice from the output in a common method; because the indices of batches have certain difference, larger single batch output can better reduce the index difference of the batches. The process disclosed by the invention is larger in single batch output and reduces the processing cost of ton products.

The invention discloses a silicon-magnesium laterite-nickel ore cold sintering ball concretely, which is characterized by being prepared from silicon-magnesium laterite-nickel raw ore and a consolidation agent, wherein the consolidation agent is selected from one or more of steel slag powder, wood chip, reed canes and paper scrap and accounts for 5-10% of the total weight; and the diameter of the cold sintering ball is 30-60mm and the strength is 50-200kg/cm2. A preparation method of the cold sintering ball comprises the following working procedures: (1) drying the silicon-magnesium laterite-nickel ore in air until moisture is smaller than or equal to 20%; (2) grinding the silicon-magnesium laterite-nickel ore until granularity is smaller than or equal to 0.5mm; (3) mixing the silicon-magnesium laterite-nickel ore with the consolidation agent with granularity less than or equal to 0.5mm; and (4) using a ball forming mill for cold pressing the mixture into silicon-magnesium laterite-nickel ore cold sintering ball with diameter of 30-60mm and strength of 50-200kg/cm2. The preparation method of the cold sintering ball has the advantages of good furnace conditions when smelting nickel, good slag flowability, good air permeability, uniform combustion, high bed output ability, low coke rate, and low nickel content of slag.

The invention relates to an esterification conversion method of gulonic acid. The method comprises: uniformly mixing industrial methanol and concentrated sulfuric acid, adding a gulonic acid dry product in a stirring state, carrying out a methyl esterification reaction in a staged temperature changing manner, sequentially adding sodium bicarbonate and deionized water, heating, carrying out a conversion reaction, cooling after the reaction is finished, and carrying out centrifugal separation to obtain the sodium ascorbate. According to the invention, the gulonic acid esterification conversion method is simple in process, easy to operate, low in cost, capable of greatly increasing the molar conversion rate from gulonic acid to VC sodium (increased by 1.5-3.2% compared with the prior art) andsuitable for large-scale production.

The invention provides an external micro-interface unit enhanced oxidation system for producing PTA from PX. The external micro-interface unit enhanced oxidation system comprises a reactor, a circulating heat exchange device and a micro-interface unit, wherein the reactor comprises a shell and an inner barrel concentrically arranged in the shell; the circulating heat exchange device is arranged outside the reactor, is separately connected with the shell and the inner barrel, and is used for adjusting the reaction temperatures of a first reaction zone, a second reaction zone and a third reaction zone in the reactor in the reaction process; and the micro-interface unit is arranged between and connected with the reactor and the circulating heat exchange device and is connected with an external feeding pipeline of the reactor. The system of the invention overcomes the problems that a large amount of a reaction solvent, namely acetic acid is wasted at high temperature and high pressure anda product TA cannot be taken out in time in the existing process of producing PTA from PX, so energy consumption is greatly reduced, the acetic acid solvent is saved, and reaction efficiency is improved.

The invention provides a method for preparing alkyd resin for dyed veneers. The method comprises the following steps: step 1, mixing a reactive ultraviolet light absorber, a first batch of polyol monomers and an acid component to initiate esterification co-polymerization reaction; and step 2, adding a second batch of polyol monomers into the reaction liquid obtained after the step 1 is completed,and initiating esterification co-polymerization reaction; wherein the reactive ultraviolet light absorber comprises at least two esterification reaction active groups, and each esterification reactionactive group is independently selected from hydroxyl or carboxyl; the first batch of polyol monomers and the second batch of polyol monomers independently comprise at least two of dihydric alcohol monomers, trihydric alcohol monomers and tetrahydric alcohol monomers; and the acid monomer includes a polybasic acid monomer. According to the invention, the reactive ultraviolet absorber, the first batch of polyol monomers and the second batch of polyol monomers are jointly used as monomers for esterification polymerization reaction, so that the prepared alkyd resin has excellent permeability, yellowing resistance and discoloration resistance.

The invention discloses a method for increasing the yield of the rubber accelerator TBBS, belonging to the field of fine chemical engineering. According to the invention, the accelerator MBT, tert-butylamine and sodium hypochlorite are used as raw materials, water is used as a medium, and sodium chloride and sodium dodecyl benzene sulfonate are added into a reaction system to synthesize the rubberaccelerator TBBS. The dispersion degree of MBT particles in water is increased by utilizing the dispersion effect of the surfactant, and after tert-butylamine is added, the contact surface of the MBTparticles and the tert-butylamine is increased, so the synthesis rate of an M-amine salt is increased; and since NaCl is added to increase the polarity of a reaction environment, the M-amine salt isbetter dissolved in the polar environment, is in full contact with sodium hypochlorite molecules and fully participates in the reaction, so a conversion rate is increased, and the consumption of tert-butylamine is reduced. NaCl and the surfactant sodium dodecyl benzene sulfonate are added, so product yield is greatly improved and is 96% or above; and meanwhile, the synthesized material is white inappearance, high in melting point and high in purity.