33results about How to "Reduce the possibility of precipitation" patented technology

The invention discloses continuous casting crystallizer mold powder of a sheet billet at a high casting speed. The mold powder comprises chemical components in percentage by weight as follows: 34%-44% of CaO, 2%-8% of Al2O3, 20%-30% of SiO2, 1%-9% of MgO, 5%-15% of F, smaller than or equal to 6.5% of Na2O, smaller than or equal to 5% of K2O, smaller than or equal to 6% of Li2O and the balance of carbon and uncontrollable impurities. Content of CaO in the mold powder is high, content of SiO2 in the mold powder is low, accordingly, the degree of purity of molten steel can be improved, simultaneously, MgO and CaO in the mold powder are alkaline earth metal oxides, Li2O, Na2O and K2O are alkali metal oxides, the melting temperature is low, the fluxing effect is achieved, the usage amount of a fluxing agent can be reduced, the probability of various crystal precipitation is reduced, so that the glass performance of the mold powder is improved, and the mold powder has a good lubrication effect at the high casting speed; accurate control on F content meets requirements of surface quality at the high casting speed, and lubrication is improved by means of an appropriate amount of Al2O3; and the mold powder can meet technological requirements of continuous casting of medium carbon steel such as SS400, Q345 and the like, moreover, the mold powder components have stable performance, and sequence casting can be realized.

The invention provides a Nnintedanib inclusion compound and preparation and a preparation method thereofof the preparation. The inclusion compound comprises a main drug and an inclusion material, wherein the main drug is Nnintedanib or pharmaceutically acceptable salt in pharmacy, and the inclusion material is cyclodextrin or a derivative of cyclodrxtrin. The inclusion compound can sharply improvethe drug solubility of a simulated intestinal solution, the probability of the drug being separated out in the intestinal canal is lowered, and accordingly the bioavailability of the drug is improved. The inclusion compound and the preparation prepared from the inclusion compound and pharmaceutically acceptable ingredients in the pharmacy can outstandingly improve the dissolution degree and the dissolution rate of the drug in the simulated intestinal solution, the bioavailability of the drug is improved, meanwhile, the inclusion compound and the preparation have good stability, thus the flexibility and compliance of drug taking of patients are improved, and accordingly the treatment effect of the drug is improved. In addition, the invention provides a preparation method of the medicinal preparation of the Nnintedanib inclusion compound, no specific equipment is needed, the technology is simple, the production cost is low, and the preparation method is suitable for industrialized production.

The present invention discloses a dust removing apparatus, which comprises a housing, a gas inlet total pipe, at least a gas inlet branch pipe, a gas discharge total pipe and at least a gas discharge branch pipe, wherein at least a filtration chamber is arranged inside the housing, each filtration chamber is provided with a filtration chamber gas inlet and a filtration chamber gas discharge port, the gas inlet total pipe is provided with a total pipe gas inlet, the gas inlet total pipe is a diameter variable pipe and the diameter is gradually reduced along the direction away from the total pipe gas inlet, one end of the gas inlet branch pipe is communicated to the gas inlet total pipe, the other end is communicated to the corresponding filtration chamber gas inlet, one end of the gas discharge branch pipe is communicated to the gas discharge total pipe, and the other end is communicated to the corresponding filtration chamber gas discharge port. According to the present invention, the gas inlet total pipe is a diameter variable pipe and the diameter is gradually reduced along the direction away from the total pipe gas inlet, such that the high temperature coke-oven gas nears the constant pressure in the gas inlet total pipe and enters each filtration chamber in the constant pressure state so as to avoid the generation of the large temperature difference during the filtration to reduce the possibility of the tar precipitation.

The invention relates to the technical field of sapphire processing, in particular to a guide mode processing method for flaky sapphire. The guide mode processing method mainly comprises the following steps: (1) treating raw materials; (2) cleaning a furnace body; (3) filling the raw materials; (4) vacuuming the furnace body; (5) performing high-temperature crystal guidance; (6) performing necking down; (7) performing shoulder expansion; (8) performing equal-diameter growth; and (9) performing annulling cooling, and the like. On one hand, impurities in the crystal growth process can be reduced, crystal can be prevented from being polluted, and the purity of the crystal can be improved; and on the other hand, bubbles generated in the melting process of the crystal can be reduced, raw material gaps can be reduced as the raw materials are compacted and filled according to a certain ratio, the bubble generation probability in crystal growth can be reduced, and the crystal quality can be improved; furthermore, through procedures of high-temperature crystal guidance, necking down, shoulder expansion, equal-diameter growth and annealing cooling, cracks, displacement, glass fragment strips and genetic defects can be reduced in the crystal growth process, and thus the crystal quality can be improved.

The invention discloses a coloring master batch for a profile protective film, belonging to the field of plastic additives. The master batch comprises the following raw materials in percentage by mass: 60-75% of titanium dioxide, 15-30% of LLDPE (linear low density polyethylene), 5-10% of mPE, 0.3-0.5% of silicone and 4-10% of EVA, wherein the volatilization amount of low molecular weight organic matters of titanium dioxide is less than or equal to 0.15%; and titanium dioxide is rutile type titanium dioxide, and the average particle size is 0.2-0.25 micron. The invention also discloses a preparation method of the coloring master batch. Compared with a conventional preparation method, the preparation method is lower in temperature of extrusion processes, and can be used for effectively controlling the volatilization amount of low molecular weight matters. The coloring master batch disclosed by the invention has the advantages that the coloring master batch has high titanium dioxide content, large adding proportion, high dispersion performance and good shading effect; film products are smooth and do not have crystal points; the low molecular weight organic matters are low in volatilization amount; and the coloring master batch is good in printing ink and gluing adhesive force and convenient to use, and low-temperature processing, energy conservation, high efficiency and low cost can be achieved.

The invention belongs to the field of inhibition of precipitation of easily precipitated elements in an electrolyte, and discloses an all-vanadium redox flow battery electrolyte formula and process for inhibiting precipitation of easily precipitated element impurities in the electrolyte. According to different precipitation characteristics and precipitation conditions of elements prone to precipitation, the highest limit value which can be borne by electrodes in a vanadium electrolyte and a battery is comprehensively considered, the elements prone to precipitation are controlled according to the concentration upper limit when a certain main group (or subgroup) exists at the same time or exists singly, and a concentration interval for long-time safe operation of the system is given. The content of the easily precipitated elements can be effectively controlled, the stability of the electrolyte is improved, the service life of equipment such as a battery resistor is prolonged, and the cost of the electrolyte is effectively reduced.

The invention discloses a high-strength anti-aging rubber material for a flexible plug cap for a solid rocket engine nozzle, and a preparation method thereof. The rubber material comprises, by weight,100 parts of ribbed smoked sheets, 2-2.5 parts of an adhesive, 4-5 parts of zinc oxide, 2-3 parts of stearic acid, 45-47 parts of carbon black, 12-14 parts of lauric acid, 2-3 parts of coumarone resin, 2-2.5 parts of Vaseline, 1.8-2 parts of sulfur, 1.6-2.1 parts of an accelerator and 3.4-4 parts of an anti-aging agent. The rubber material has the advantages of no blooming, good adhesive propertywith polyamide fabric, high strength and high aging resistance, the tensile strength is up to 25 MPa or above, and the 70 DEG C * 72h aging resistance change rate is 1.04%, the bonding strength of the rubber material and the fabric is 3.84 kN/m or above, the rubber material has a low hardness, and after the rubber material is stored for two years, the surface of the rubber material has no blooming, and the rubber material has a high apparent quality. The preparation method is simple to operate, and is suitable for large-scale production.

The invention discloses a preparation method of a low-temperature conductance coefficient crosslinked polyethylene insulating material. The preparation method comprises the following steps: firstly, drying low-density polyethylene for 48 hours to guarantee the LDPE to be clean and dry; secondly, adding the dry low-density polyethylene, an antioxidant, a crosslinking agent and 4,4'-bisdimethylaminobibenzoyl into a three-necked flask according to a mass ratio of 100:0.1:2:0.3, adding a dimethylbenzene solvent, and stirring in an oil bath with the temperature of 110 DEG C for 3 h to remove dimethylbenzene to obtain an LDPE mixture; and finally, pressing a test sample, and performing vacuum drying for 48 hours to completely discharge impurities generated in the crosslinking process of the testsample. By the preparation method, the temperature conductance characteristic of XLPE is significantly improved, which is of an important significance for the XLPE for high-voltage DC cables.

The invention relates to a tricarboxylic acid compound as well as a preparation method and application thereof. The tricarboxylic acid compound has the structural characteristics as shown in a formula (I). The structure of the tricarboxylic acid compound does not contain a cyclic reactive functional group, the tricarboxylic acid compound is applied to a degradable composite material as a compatibilizing lubricant, the problems of poor flowability and degradation performance reduction caused by a cross-linking reaction of the material can be avoided, the compatibilizing effect is good, and the application range is wide. The processing fluidity of the composite material is remarkably improved, meanwhile, the composite material has good degradation performance, the thermal stability of the composite material in the high-temperature processing process is improved, and the actual application requirement is better met.

The invention discloses an antimony sulfide solar cell with a CuI/PbPc film as a hole transport layer and a preparation method thereof. the structure of the solar cell inlcudes a transparent conductive substrate, a melanophosphene thin film, an antimony sulfide thin film, an organic semiconductor thin film, a CuI/PbPc thin film and a metal electrode in order from bottom to top. The advantages are:(1) the photoelectric conversion efficiency of solar cells is effectively improved by utilizing the characteristics that antimony sulfide has high light absorption coefficient, covers most of the visible light spectrum, and the bandgap width is moderate and easy to be regulated; (2) the laminated structure of antimony sulfide and organic semiconductors can improve the separation efficiency of carriers; (3) CuI/PbPc as hole transport layer can replace traditional organic compound to improve the stability of the device in humid environment. (4) melanophosphene is used as electron transport layer material, the series resistance of solar cell can be reduced effectively, the photocurrent can be increased greatly, and the photoelectric conversion efficiency of solar cell can be further improved.