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

The invention provides a built-in micro-interface unit enhanced reaction system for producing PTA through PX and a process thereof. The system comprises a reactor and a micro-interface unit arranged in the reactor. The reactor comprises a shell, an inner barrel concentrically arranged in the shell, and a circulating heat exchange device partially arranged outside the shell; wherein the bottom endof the inner cylinder is connected to the inner bottom surface of the shell in a closed manner, the top end of the inner cylinder is open, an area between the shell and the inner cylinder is a first reaction area, a second reaction area and a third reaction area are sequentially arranged in the inner cylinder from top to bottom, and the circulating heat exchange device is respectively connected with the inner cylinder and the micro-interface unit. According to the method, the problems that a large amount of reaction solvent acetic acid is wasted at high temperature and high pressure and a product TA cannot be taken out in time in the existing process of producing PTA through PX are effectively solved, so that the energy consumption is greatly reduced, an acetic acid solvent is saved, and the reaction efficiency is improved.

The invention discloses a method for recovering NdFeB casing oil sludge waste through Ca-chloride reduction and diffusion technology, which belongs to the technical field of solid waste recovery and reuse in the rare earth permanent magnet industry. The process includes drying of sintered NdFeB oil sludge waste, reduction and diffusion of Ca-chloride, decalcification by immersion at low temperature, doping of rare earth-rich alloy powder, sintering and heat treatment. Using NdFeB casing hole sludge waste as raw material, Ca-KCl direct reduction and diffusion is used to obtain regenerated NdFeB magnetic powder, and the recovered powder can be sintered to produce regenerated sintered magnets. In this invention, potassium chloride is used as a low-melting point auxiliary agent, which can reduce the reaction temperature and shorten the reaction time, improve the recovery rate, and reduce the amount of calcium metal; the use of low-temperature decalcification can prevent powder oxidation and improve decalcification efficiency; The use of rare earth alloys can supplement rare earths, which is beneficial to composition adjustment and industrial production. The invention realizes the purposes of shortening the recycling process, reducing the recycling cost, reducing the environmental burden and increasing the utilization rate of waste materials.

The invention discloses a molten pool smelting furnace, which comprises: a furnace body and a plurality of spray guns. The furnace body has a furnace chamber with a circular cross section. multiple spray gun sockets. The spray guns are inserted into the spray gun sockets, and the multiple spray guns deviate from the center of the circular cross-section of the furnace cavity along the same direction. The melting pool melting furnace according to the embodiment of the present invention has the advantages of low energy consumption and good melting effect.

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 thecold 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 the field of preparation of polyester, and discloses a method for preparing PET copolyester. The method comprises the following steps: 1, mixing ethylene glycol, a catalyst, an assistant and terephthalic acid, and carrying out beating and uniform stirring, wherein a molar ratio of the terephthalic acid to the ethylene glycol is 1:(1.1-1.6); 2, conveying the obtained material to a first esterification kettle, and carrying out primary esterification; 3, adding 2-methyl-1,3-propanediol, and carrying out secondary esterification in a second esterification kettle, wherein amolar ratio of the terephthalic acid to the 2-methyl-1,3-propanediol is 1:(0-0.6); and 4, sequentially carrying out pre-polycondensation and final polycondensation to prepare the finished product. The prepared PET copolyester has the advantages of effective destroy of the regularity of the molecular structure of the polyester, reduction of the crystallization rate and the melting point, effectiveimprovement of the transparency in the blow molding process of bottles and the molding process of films, and reduction of the processing temperature.

A sulfone polymer composition and preparation method thereof, and thermoplastic molding composition therefrom, comprising: (A) at least one aromatic sulfone polymer; (B) one compound of 4,4′-dichlorodiphenyl sulfone; wherein, based on the total weight of the sulfone polymer composition, 4,4′-dichlorodiphenyl sulfone weight content is less than 600 ppm. In the preparation method, tetramethylene sulfone is used as a solvent, 4,4′-dichlorodiphenyl sulfone and 4,4′-Dihydroxydiphenyl sulfone or 4,4′-dihydroxy biphenyl are used as reactive monomers, while the mixed salt of sodium carbonate and potassium carbonate is used as salt-forming agent, the composition may be obtained by polymerization with solution polymerization techniques; wherein the molar ratio of the said potassium carbonate and sodium carbonate is 0.1: 100-5: 100. The sulfone polymer composition has a transmittance greater than 85%, a haze less than 4%, and a yellowness index less than 5, enjoying a significantly improved transparency and color levels.

The present invention provides an enhanced oxidation system with an external micro-interface unit for producing PTA from PX, comprising: a reactor, a circulation heat exchange device and a micro-interface unit; wherein, the reactor includes a shell and is concentrically arranged inside the shell The inner cylinder; the circulation heat exchange device is arranged outside the reactor, and is connected with the outer shell and the inner cylinder respectively, so as to adjust the first reaction zone and the second reaction zone inside the reactor. And the reaction temperature in the reaction process of the third reaction zone; the micro-interface unit is connected between the reactor and the circulation heat exchange device, and is connected with the external feed pipe of the reactor. The present invention effectively solves the problem that the reaction solvent acetic acid is wasted in large quantities under high temperature and high pressure in the existing PX production process of PTA, and the problem that the product TA cannot be taken out in time at the same time, thereby greatly reducing energy consumption, saving acetic acid solvent, and improving the Reaction efficiency.

The invention provides a medicine for repairing skin damage and a preparation method thereof. In parts by weight, the raw material components of the drug include: 0.01-0.1 parts of menthol, 0.01-0.1 parts of borneol, 1-5 parts of trehalose, 1-5 parts of nicotinamide, 0.1-2 parts of D-panthenol, transparent 0.1-0.3 parts of sodium hyaluronate, 1-5 parts of hydroxyethyl cellulose and 82-97 parts of water. The preparation method includes: mixing water, menthol, borneol, trehalose, nicotinamide, sodium hyaluronate and hydroxyethyl cellulose Heating after mixing, then cooling down, then adding D-panthenol, mixing to obtain the drug. The drug combines menthol, borneol, trehalose, nicotinamide, and D-panthenol in accordance with the scientific ratio. The various components have a positive synergistic effect, which can reduce swelling, relieve pain, relieve sedation, and protect the damaged skin surface. Form a layer of breathable protective film to prevent the damaged skin from external stimulation, so that the damaged skin can be repaired quickly.

The invention provides an acne-removing composition and a preparation method thereof. In parts by weight, the raw material components of the anti-acne composition include: 0.1-1.0 parts of paeonol, 0.1-1.0 parts of glycyrrhizin, 0.1-1.0 parts of purslane extract, 0.1-0.8 parts of nicotinamide, wood 0.1-0.8 parts of sugar alcohol glucoside, 1.5-4 parts of emulsifier, 2-5 parts of humectant, 1.5-4 parts of lubricant and 82.5-94.5 parts of water. The composition combines paeonol, glycyrrhizin, purslane extract, nicotinamide and xylitol glucoside according to the scientific ratio, and the various components have a positive synergistic effect, which can inhibit the secretion of sebaceous glands Sebum, unclogs pores, and also has excellent antibacterial and bactericidal effects. It can remove acne from many aspects and completely eliminate acne. At the same time, it has fast healing speed, no toxic side effects, will not cause skin allergies, and will not leave scars after healing. or pigmentation benefits.

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 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 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.