456results about How to "Avoid thermal decomposition" patented technology

The invention discloses a condensed-ring compound and a preparation method and an application thereof. The condensed-ring compound has a structure represented by formula (I) or formula (II). The HOMOand LUMO energy levels of the fused-ring compound are completely separated, so that the energy gap width of the material is reduced, the three-wire energy level is improved, and the energy backflow from the object material to the main material is avoided to reduce the luminous efficiency; HOMO and LUMO energy levels are matched with adjacent materials, and the driving voltage is small. The devicehas large molecular structure size and good intramolecular conjugation, so it has good thermal stability, can avoid thermal decomposition of materials during film formation or use, avoids loss of material layer function, and improves luminous efficiency and luminous performance of the device. The invention also provides a preparation method of the fused-ring compound and its application as an organic electroluminescent material.

The invention relates to a low temperature and low hydration heat cementing concrete system used in the natural gas hydrate layer cementing field. The objective of the invention is to effectively reduce the heat release of the cement hydration, prevent the hydrate from decomposing because of large heat and reduce the harm of the hydrate to the cementing. The whole performance of the cement under the low heat release condition is improved by adding materials which can reduce the whole hydration heat release of the cement using G grade oil well cement as base material. (1) The proper addition of superfine slag with a specific surface area between 6000 and 12000cm2/g can make sure the strength properties of the early and later stage of the cement. (2) The hydration heat is further reduced by adding fly ash with a lower hydration activity. (3) An amount of gypsum component is added so that the cement paste has certain expansion property at a low temperature to prevent the cement paste shrinking at a low temperature. The low temperature and low hydration heat cementing concrete provided by the invention has an obvious effect for reducing the whole cement hydration heat and a good effect for preventing the deep water hydrate decomposition.

An object of the present invention is to provide an electrolyte solution for lithium-ion secondary batteries comprising a tetraalkylphosphonium salt which improves the cycle characteristics and safety of lithium-ion batteries, and to provide a lithium-ion secondary battery using the electrolyte solution. Disclosed is an electrolyte comprising a tetraalkylphosphonium salt represented by general formula (1)

wherein R₁ represents a linear, branched or alicyclic alkyl group having 2 to 6 carbon atoms and R₂ represents a linear, branched or alicyclic alkyl group having 1 to 14 carbon atoms, provided that R₁ and R₂ are different from each other and the total number of carbon atoms in the phosphonium cation is 20 or less; and X represents an anion.

Methods of forming metal alkoxides and methods of forming precursor solutions of metal alkoxides suitable for the coating of glass in the manufacture of electrochromic devices are disclosed. The method of forming metal alkoxides involves dissolving the metal halide in an anhydrous solvent and reacting it with an alcohol and (together with the addition of the alcohol or subsequently) adding an epoxide, and then evaporating-off the volatile components of the reaction product to leave a solid metal alkoxide that is substantially free of halide. The alkoxide may then be dissolved in a solvent including an alcohol (preferably ethanol) containing a small proportion of water to produce a precursor solution suitable for coating glass, the coating then being hydrolyzed to form a sol-gel and then baked to remove volatile components and to yield a thin layer of metal oxide.

The invention relates to a Nickel single-active site graphite-phase carbon Nitride-based photocatalytic material as well as a preparation method and application thereof, in the photocatalytic material, Ni is dispersed in a g-C3N4 framework in a single-atom-level degree to form active sites, and the molar content of the Ni is 1-5%. the nickel single-active site graphite-phase carbon nitride-based photocatalytic material has a large specific surface area, is good in dispersion in an aqueous solution, and can effectively inhibit the recombination of photo-generated carriers, the reaction activitysites of the surface of the g-C3N4 are increased, the photocatalytic hydrogen production efficiency can be remarkably improved, and the photocatalytic reaction activity of the g-C3N4 can be improved.

The invention concerns a method for modifying a source material used in an ALD process, a method for depositing transition metal nitride thin films by an ALD process and apparatus for use in such process. According to the present invention, transition metal source materials are reduced by vaporizing a metal source material, conducting the vaporized metal source material into a reducing zone comprising a solid reducing agent maintained at an elevated temperature. Thereafter, the metal source material is contacted with the solid or liquid reducing agent in order to convert the source material into a reduced metal compound and reaction byproducts having a sufficiently high vapor pressure for transporting in gaseous form.

A composition for producing synthetic timber includes polyvinyl chloride resin; wood dust, nut shell powder, crop straw powder, waste paper powder or their mixture; and at least one of chlorinated polyethylene, acrylonitrile-butadiene-styrene polymer and methyl methacrylate-butadiene-styrene polymer as impact modifier. The materials in certain weight ratio are produced into granulated material through mixing, extrusion and pelletizing; or produced into powdered material through thrice mixing. The said composition can be used for producing synthetic timber with the grains and other characteristics simmilar to natural timber for use in building.

A gas turbine combustion chamber with a burner 7, includes means for the supply of fuel and an atomizer 6, wherein the means for the supply of fuel are provided such that the fuel is injected in areas with maximum airflow velocity.

The present invention relates to a distillation method of oxime. Tower bottom materials are usually heated by still distillation, a U-shaped outer tube or a rotary film evaporator, long-term operation of the tower bottom is easy to coking, and the distillation efficiency is low. The invention is characterized in that: in the distillation and separation section of oxime, at least one high boiling point solvent is added in the distillation process, the content of the high boiling point solvent in the tower bottom is maintained in proportional to that of oxime, and finally oxime is effectively separated by distillation. Oxime is fed into a rectifying tower, and is distilled at an absolute pressure of 0-0.4 MPa and at 20-300 DEG C to collect fractions. The unevaporated liquid left in the tower bottom is subjected to the processes of removing water and impurities, and is recycled to the rectifying tower as a high boiling point solvent. The present invention can reduce total production costs, simplify operation processes, prevent the product from coking in the tower bottom or decomposing due to overheating, ensure product distillation to be efficient, continuous, safe and stable, and improve product quality.

The invention relates to vinyl stabilizer system and the application that includes the following steps: mixing stearic acid and lime, heating to 150-180 degree centigrade to take reaction to form calcium stearate, mixing stearic acid with zinc oxide, heating to 130-150 degree centigrade to take reaction to form zinc stearate, mixing calcium stearate with benzoyl stearyl methane, organiotin, polhydric alcohol, white wa, SG-16 inside and outside lubricant to take compounding to form several types high efficient calcium zinc composite stabilizer. It could be used in producing PVC-U feed pipe and drain pipe, soft PVC wire, cable, etc. It lowers process temperature, improves thermal stability and ageing resistance, improves the performace of engineering plastics.

The present invention relates to an extruded expanded thermoplastic polyurethane elastomer bead and a preparation method therefor. The bead consists of components of the following parts by weight: 100 parts by weight of a thermoplastic polyurethane elastomer, 0.01-0.5 parts of a foaming nucleating agent, and 0.01-0.2 parts by weight of an antioxidant. The preparation method comprises: mixing materials, then putting the mixture into an extruder for granulation to produce a particle raw material suitable for foaming, finally, putting the particle into a foam extruder, and die foaming then underwater pelletizing, thus obtaining a product bead. The present invention utilizes an extrusion method to prepare expanded thermoplastic polyurethane beads. Control of the working conditions of the foaming process could lead to acquiring an expanded=bead of a controllable density, the cell density evenly distribute. The overall production process is easy to operate. Without any special limit or requirement placed on the equipment, this method is suitable for industrial continuous production.

The invention belongs to the polyester spinning field and relates to an 8-shaped hollow polyester fiber FDY (Fully Drawn Yarn) and a preparation method thereof. A spinning melt contains saturated fatty acid metal salt and modified polyester, wherein the mass ratio of saturated fatty acid metal salt to modified polyester is (0.0005-0.002) to 1; saturated fatty acid metal salt is fatty acid metal salt, the carbon atomic number is 12-22, the melting point is 100-180 DEG C, and the kinetic viscosity is less than or equal to 1Pa.s; a molecular chain of modified polyester comprises a terephthalic acid chain segment, a glycol chain segment and a rigid structure chain segment, and the molar ratio of the rigid structure chain segment to the terephthalic acid chain segment is (0.02-0.05) to 1; and the die swell ratio of the spinning melt is 1.23-1.33, and the after-filtration pressure during the spinning is 85-125kg/cm<2>. The prepared 8-shaped hollow polyester fiber FDY has relatively high degree of hollowness and relatively good shape-preserving effect.

The invention relates to a sub-critical extraction process of coconut oil. Fresh and mature coconut meat serves as a raw material and sub-critical fluid serves as an extraction solvent to obtain natural coconut crude oil through sub-critical extraction and low-pressure analysis, the sub-critical fluid is used continuously after compression, and the crude oil is subjected to post-processing technologies such as filtration and decoloration to obtain high-quality edible-grade coconut oil. Monomers of several major products in the coconut oil can be extracted by using processes such as grading analysis to obtain coconut oil products with higher added values. The process is high in extraction ratio, the obtained coconut oil reserves all useful components of the natural coconut oil, residual extracting solvent after the analysis can be avoided, and the quality of the coconut oil is greatly improved compared with the existing process.

COSMETIC SAMPLER AND PROCESS TO MANUFACTURE THE SAME, said cosmetic sampler comprising: a base film (10) presenting an oleophobic upper face (11); a cosmetic product portion (20) deposited an retained on the oleophobic upper face (11) of the base film (10); a covering film (30) having an oleophobic lower face (32) hermetically and removably fixed onto the oleophobic upper face (11) of the base film (10), in order to cover the cosmetic product portion (20). The process to manufacture the cosmetic sampler comprises the steps of: depositing on said oleophobic upper face (11) of the base film (10) a cosmetic product portion (20) maintained at a determined temperature range and according to a predetermined contour, and removably fixing the covering film (30) against said oleophobic upper face (11) of the base film (10), in order to retain said cosmetic product portion (20) according to said previously determined contour.

The invention belongs to the field of chemical detection and particularly relates to test paper for rapidly detecting nitrite and a preparation method and application of the test paper. According preparation method, the test paper for rapidly detecting the nitrite is prepared by taking a filter paper body as a carrier, a p-aminobenzene sulfonic acid solution and an N-1-naphthyl ethylenediamine hydrochloride as color developing agents, as well as an ethanol water solution of polyvinyl alcohol as a surface protectant and can be used for detecting the content of the nitrite. The test paper is low in cost, convenient and rapid to use and has long-term stability.

The invention discloses a method for continuous counter-current ultrasonic extraction of high-purity astragalus polysaccharide. The method comprises the following processing steps: crushing astragalus membranaceus and soaking into distilled water; centrifuging and taking supernate after continuous counter-current ultrasonic extraction; decoloring by active carbon, so as to obtain an astragalus polysaccharide water extract solution; then concentrating and adding ethanol to stir; centrifuging and diluting sediments by the distilled water; carrying out alcohol precipitation after filtering diluents by a membrane, wherein the sediment is astragalus polysaccharide solid. By adopting the method, the dissolution rate of the astragalus polysaccharide can be improved; the extraction time is shortened; the dosage of a solvent is reduced. Therefore, the method has the characteristics of high selectivity, simple process, low energy consumption, high yield, high product purity and the like.

A thermal spray powder of the present invention includes particles composed of molybdenum disulfide, and a coating layer provided on the surface of each of the particles. The coating layer is composed of a metal that is softened or melted at a temperature lower than the heat decomposition temperature of the molybdenum disulfide. The coating layer is preferably composed of copper. The thermal spray powder suppresses heat decomposition of the molybdenum disulfide contained in the thermal spray powder during thermal spraying.

The method for electroless deposition of a coating material, which may be a metal, semiconductor, or dielectric, that is carried out at a relatively low temperature of the working solution compensated by an increased temperature on the substrate which is controlled by a heater built into the substrate chuck. A decrease in the temperature of the working solution prevents thermal decomposition of the solution and reduces formation of gas bubbles, normally generated at increased temperatures. Accumulation of bubbles on the surface of the substrate is further prevented due to upwardly-facing orientation of the treated surface of the substrate. The substrate holder is equipped with a substrate heater and a substrate cooler, that can be used alternatingly for quick heating or cooling of the substrate surface.

The invention relates to a regenerating process technology for producing high quality low-pour-point lubricant base oil by the full hydrogen method of waste lubricant oil. The process technology comprises the following steps: firstly, performing predistillation and atmospheric flashing on the waste lubricant oil to remove water and pulling out light oil, and then performing propane refining to remove the vast majority of impurities and additives in the oil; performing a hydrogenating reaction on the lubricant oil fraction without water and impurities and hydrogen under the action of a catalyst after being mixed, and performing gas liquid separation to obtain a liquid which enters a stripping tower to divide, thereby obtaining naphtha and light diesel oil from the top of the stripping tower; and feeding the pre-heated product in the bottom of the stripping tower into an isomeric pour point depression reactor and a compensating refining reactor, and separating light oil and the lubricant base oil from the reaction product through a fractioning device. The regenerating process technology provided by the invention is environment-friendly and pollution-free; the regenerating recovery of waste oil reaches up to 99% or above; the oxidizing stability and light stability of the base oil are remarkably improved; the product is good in quality and high in additional value; and therefore, the regenerating process technology has a very good market application prospect.

The invention provides a method for operating a reformed gas production apparatus with which it is possible to achieve a high reforming efficiency while preventing a drop in catalyst activity due to the deposition of carbon. The reformed gas production method uses a reforming catalyst to reform a fuel that contains a hydrocarbon having at least two carbon atoms to produce a reformed gas that includes methane, hydrogen, and carbon monoxide. With this method, a fluid that includes the fuel, at least one of steam and a carbon dioxide-containing gas, and an oxygen-containing gas, is supplied to a reforming reaction region, and with the thermal decomposition index temperature of the fuel, which is determined by the type and the concentration of the hydrocarbons having at least two carbon atoms that make up the fuel, serving as an upper limit temperature of the reforming reaction region, the fluid is brought into contact with the reforming catalyst to produce the reformed gas.