402results about How to "Lower decomposition temperature" patented technology

Methods and apparatus for the deposition of a source material (10) are disclosed. An atomizer (12) renders a supply of source material (10) into many discrete particles. A force applicator (14) propels the particles in continuous, parallel streams of discrete particles. A collimator (16) controls the direction of flight of the particles in the stream prior to their deposition on a substrate (18). In an alternative embodiment of the invention, the viscosity of the particles may be controlled to enable complex depositions of non-conformal or three-dimensional surfaces. The invention also includes a wide variety of substrate treatments which may occur before, during or after deposition. In yet another embodiment of the invention, a virtual or cascade impactor may be employed to remove selected particles from the deposition stream. Also a method and apparatus for maskless deposition of copper lines on a target, specifically relating to localized solution-based deposition of copper using an annular aerosol jet and subsequent material processing using conventional thermal techniques or laser processing.

The present invention provides one kind of composite antistatic carbon nanotube/polypropylene material and its preparation process. The composite antistatic carbon nanotube/polypropylene material has carbon nanotube as main antistatic modifying material and polypropylene as main modified target. The composite antistatic carbon nanotube/polypropylene material has both excellent antistatic performance and excellent mechanical performance.

A process for preparing VO2 nanoparticles includes such steps as proportionally adding V2O5 and oxalic acid to reactor, adding water, stirring at 40-70 deg.C while reaction, evaporating to obtain solid vanadium oxalate, vacuum heating to 350-500 deg.C, holding the temp for 20-40 min for thermodecomposing, and cooling. It is possible to add MoO3 or N5H37W6O24 for preparing the doped product.

The present invention provides a doped cobalt carbonate preparation method. The preparation method comprises the following steps: cobalt carbonate is prepared; the cobalt carbonate is added into a metal alkoxide solution to be mixed to obtain the cobalt carbonate wrapped by the metal alkoxide; and the wrapped cobalt carbonate is dried to obtain a doped cobalt carbonate. The present invention also provides the doped cobalt carbonate prepared by the doped cobalt carbonate preparation method, a doped tricobalt tetroxide preparation method, and a doped tricobalt tetroxide prepared by the doped tricobalt tetroxide preparation method. The doped cobalt carbonate preparation method and the doped tricobalt tetroxide preparation method can prepare the doped cobalt carbonate and the doped tricobalt tetroxide which are uniform in particle sizes, evenly coated, and large in particle sizes, respectively.

The invention relates to the technical field of industrial production of sulfuric acid and cement, the field of industrial solid waste comprehensive utilization, and the field of environment protection and treatment, and particularly relates to a pre-heating decomposition method of producing sulfuric acid from phosphogypsum with co-production of cement. The method includes the steps of powder grinding of raw materials, multi-stage cyclic pre-heating, high-effective decomposition and kiln gas separation and purification. The method is used for preparing a cement raw material from the phosphogypsum subjected to pre-heating decomposition with clay, sand rock, coke and such auxiliary materials in the process of producing the sulfuric acid from the phosphogypsum with co-production of the cement. The method solves the problems that a pre-heating decomposition technology in the prior art is low in decomposition ratio of phosphogypsum, is low in productivity of sulfuric acid and clinker, is liable to cause crusting and blocking in a kiln and is high in production energy consumption, can reduce the decomposition efficiency of the phosphogypsum and accelerate escape of SO2, and further increase the productivity of the sulfuric acid and cement clinker. The pre-heating decomposition method of producing the sulfuric acid from the phosphogypsum with co-production of the cement can significantly reduce sintering temperature and energy consumption of the clinker, can reduce production cost of sulfuric and cement clinker, and can further increase comprehensive utilization rate of the phosphogypsum.

The invention discloses a phase-change polyurethane foam and a preparation method thereof. The foam is prepared by subjecting a polyurethane foam raw material to processes of reacting, foaming, and curing; wherein the polyurethane foam raw material comprises polyether, polymethylene polyphenyl isocyanate, silicone oil, and methyl chloride; the reactions are carrier out after the mixing of a phase-change energy-storage microcapsule and the polyurethane foam raw material, the phase-change energy-storage microcapsule is composed of a capsule wall made of polyurethane-polysiloxane and a capsule core made of an organic phase-change material, and polycarbodiimide is taken as the cross-linking agent. The phase-change energy-storage microcapsule integrates the advantages of organic materials and inorganic materials together, namely has the organic materials' advantages of flexibility and elasticity, also has the inorganic materials' advantages of excellent mechanical performance and fire-retardant performance, and overcomes the shortage of easy separation between the conventional microcapsule and the foam substrate.

The invention discloses a process and a system for preparing ammonia from ammonium bicarbonate by using a wet process for flue gas denitration, belonging to the technical field of flue gas denitration in a thermal power plant. In the process, an ammonium bicarbonate solution at 90 DEG C is boosted and then enters an atomizing nozzle of a pyrolyzing furnace for backflow ejection, fogdrop of the ammonium bicarbonate decompose out ammonia gas under the heating action of high-temperature flue gas flowing from bottom to top, and the residual ammonium bicarbonate solution converges at the bottom of the pyrolyzing furnace and then returns to a dissolution pool through a circulating pump for recycling; and the ammonia gas flows to a buffer tank together with air, enters an ammonia gas-air mixer and then enters an SCR (Selective Catalyst Reduction) reactor through an ammonia-spraying grating after being diluted to certain concentration, and in the presence of a catalyst, the ammonia gas reduces NOX into N2. The ammonium bicarbonate is a reducing agent which is convenient and safe to transport and store, has better economy than urea and avoids the potential safety hazard of the reducing agents of liquid ammonia, ammonia water and the like in the aspects of transportation and storage. By adopting the ammonium bicarbonate as the reducing agent to pyrolyze for preparing the ammonia with the wet process, the whole system has the advantages of easy dosage control of the ammonium bicarbonate, stable ammonia gas generation, simplicity and high efficiency.

A process for preparing the doped composite VO2 nanoparticles with low phase-change temp (25-30 deg.C) and improved physical propoerties includes such steps as preparing the metal element and non-metal element doped solid vanadium oxalate as precursor from V2O5 and oxalic acid, and vacuum thermodecomposing. Its molecular formula is V1-xMxO2-yZy, where x=0-0.08, y=0-0.1, M is metal element and Z is non-metal element.

The invention discloses a method for preparing metal magnesium by using dolomite as a raw material, and aims to solve the problems of low reducing efficiency, high energy consumption, long production period and serious pollution existing in the conventional method for preparing the metal magnesium. The method comprises the steps: crushing of dolomites, vacuum low-temperature light calcining and recycling of carbon dioxide, cooling and heat recovery, ball-milling of mixed materials, briquetting of mixed materials, vacuum high-temperature hot reduction, separation of magnesium blocks, and utilization of slag, wherein in the vacuum low-temperature light calcining, the crushed dolomites undergo light calcining in a continuous type vacuum calcining furnace for 1 to 3 hours at the calcining temperature of between 500 and 1,000 DEG C and under the furnace pressure of 10,000 to 60,000Pa, MgCO3 and CaCO3 in the dolomites are decomposed in sequence, the reaction expression is: CaMg(CO3)2=CaCO3+MgO+CO2(gas) and CaCO3=CaO+CO2(gas), and the mixture of carbon dioxide and magnesium oxide and calcium oxide is obtained; and the carbon dioxide which flows in the furnace and heats the dolomites is recycled.

The present invention discloses reworkable epoxy compositions suitable for encapsulation of and underfill for electronic components including (a) the epoxidized reaction product of a multifunctional 1-alkenyl ether or 1-cycloalkenyl ether and an alkenyl carboxylic acid, the epoxidized reaction product having two or more thermally labile alpha-alkoxy ester linkages; and (b) a curing agent for the epoxy component. The epoxy composition, when cured, provides a composition which is thermally reworkable, the weak α-alkoxy ester linkages providing for the reworkable aspect of the invention.

The present invention provides polymer compositions having a tunable decomposition temperature. Suitable additives are disclosed for lowering the decomposition temperature of polymer compositions. The invention further provides methods of preparing such polymer compositions with tunable decomposition temperatures.

The invention relates to a catalyst used for decomposing N2O and a preparation method and application thereof, which are characterized in that an active component is a composite oxide which contains copper oxide and zinc oxide and has a spinelle structure or a perovskite-like structure, and the composite oxide is loaded on a gamma-Al2O3 carrier, and auxiliary metallic oxides can also be added; the nitrate or the acetate of the composite oxide is dissolved in water; the gamma-Al2O3 carrier is dipped, is evaporated to remove water and then is dried to obtain a precursor; and then the precursor is baked to obtain the catalyst. The catalyst is used for decomposing N2O and has high activity and high stability; the catalyst is used for the direct decomposition of N2O; the decomposing temperature of N2O is low, and the complete decomposition temperature is lower than or equal to 615 DEG C; after an intensified experiment is carried out for 100 hours, the catalyst still keeps the advantage and effect of high activity.

The invention discloses high-doped industrial waste residue cement and a preparation method thereof. The high-doped industrial waste residue cement is prepared from raw materials: 70 to 82 percent of carbide slag, 2 to 20 percent of argillaceous raw materials, 2 to 5 percent of siliceous straightening raw material, 3 to 9 percent of steel slag, 0 to 15 percent of coal ash, 0 to 10 percent of coal gangue and 0 to 15 percent of furnace slag; and auxiliary materials: 0 to 50 percent of mixed materials and 0.8 to 7 percent of desulphurized gypsum. The carbide slag is used for completely substituting limestone, and by matching various industrial residues, the preparation standard of high-doped industrial waste residue cement can be satisfied; the production cost and the energy consumption are relatively low, and the resource waste and environmental pollution caused by the industrial residues can be avoided; and the produced clinker is high in strength, stable in quality and easy to popularize and use.

The invention provides a method and a device applied to in-situ regeneration of a sulfur-poisoning SCR denitration catalyst. The method comprises the following steps: pre-oxidizing part of smoke before entering to an SCR denitration reactor when the SCR denitration catalyst is deactivated by sulfur poisoning, oxidizing part of NO in the smoke, then enabling the smoke to enter into the SCR denitration reactor, accelerating decomposition of ammonium sulfate on the surface of the catalyst, and carrying out regeneration process of the catalyst. The device applied to in-situ regeneration of the sulfur-poisoning SCR denitration catalyst comprises an ozone generator, an electromagnetic valve, an SCR denitration reactor and a smoke NOx component online monitor. The method and the device are capable of effectively decomposing ammonium sulfate deposited on the surface of the catalyst under the condition with temperature of 200-380 DEG C; the activity of the treated sulfur-poisoning catalyst is improved; the service life of the catalyst is prolonged; the replacement cost of the catalyst is reduced.

The present invention provides an efficient catalyst for decomposition of N2O and a preparation method and application thereof. The catalyst comprises an active center and a carrier; the active center includes quantum dot oxide and spinel-type structural compound, and the carrier is a Al2O3 carrier; and the catalyst has a molecular formula L IIxO / M II1-xNIII2O4 / Al2O3, wherein: L II and M II are divalent metal cations, N III is a trivalent metal cation, and x equals to 0.01-1.0. The efficient catalyst for decomposition of N2O has high activity, good stability and low N2O decomposition temperature, is conducive to the purification of industrial waste gas from adipic acid plant; and the catalyst for decomposing N2O can significantly reduce the N2O concentration in industrial emission, reduce air pollution and protect the environment.

The invention relates to a high-flux ceramic flat sheet membrane and a preparation method thereof. The high-flux ceramic flat sheet membrane comprises a ceramic flat sheet membrane supporting body and a separation membrane layer wrapping the outer surface of the ceramic flat sheet membrane supporting body. The ceramic flat sheet membrane support body is prepared from the following raw materials in parts by mass: 40-57 parts of diatomite, 30-40 parts of alpha-alumina powder, 4-12 parts of a pore forming agent, 20-40 parts of a support body binding agent, 8-12 parts of a lubricant, 9-13 parts of a plasticizer and 12-18 parts of chopped fibers. The separation membrane layer is prepared from the following raw materials in parts by mass: 40-43 parts of ceramic powder particles, 4-6 parts of ethanol, 19-40 parts of a separation membrane layer binding agent and 9-12 parts of polyethylene glycol. The high-flux ceramic flat sheet membrane product is low in sintering temperature, low in production cost, high in product porosity, small in filtering resistance and high in water flux.