92 results about "No removal" patented technology

Stabilized surfactant-based membranes and methods of manufacture thereof. Membranes comprising a stabilized surfactant mesostructure on a porous support may be used for various separations, including reverse osmosis and forward osmosis. The membranes are stabilized after evaporation of solvents; in some embodiments no removal of the surfactant is required. The surfactant solution may or may not comprise a hydrophilic compound such as an acid or base. The surface of the porous support is preferably modified prior to formation of the stabilized surfactant mesostructure. The membrane is sufficiently stable to be utilized in commercial separations devices such as spiral wound modules.

A surgical method and tool for expanding an initial osteotomy (42) to receive a dental implant (44). An osteotome (22) having a tapered working end (28) is inserted into the initial osteotomy (42). The initial osteotomy (42) is enlarged by simultaneously rotating and pushing the working end (28) of the tapered osteotome (22) into the osteotomy (42). One or more burnishing edges (40) concentrate the pushing and rotational force in outward normal and tangential component forces against the interior surface of the osteotomy (42) to incrementally expand the osteotomy (42) with little to no removal of bone material (46). The inserting and enlarging steps are repeated, as needed, with progressively larger tapered osteotomes (22) until an osteotomy (42) of predetermined size is achieved. Finally, a fixture portion of a dental implant (44) is installed into the expanded osteotomy (42).

The invention discloses a catalyst for low-temperature flue gas denitration, and a preparation method thereof. The method adopts a selective catalytic reduction (SCR) technique, takes vanadium oxide as an active component and titanium oxide as a carrier, and substitutes fluorine for partial oxygen in an oxide catalyst, so as to prepare the catalyst, wherein the vanadium oxide as the active component is loaded on the carrier by an impregnation method; the titanium oxide as the carrier is prepared by a sol-gel method; and the substitution of fluorine for oxygen can be carried out when the titanium oxide as the carrier is prepared, or when the vanadium oxide as the active component is loaded, or when the titanium oxide as the carrier is prepared and the vanadium oxide as the active component is loaded. The catalyst remarkably improves low-temperature denitration activity and catalytic capability, can reach the NO removal rate of over 90 percent at a temperature over 200 DEG C, has strong industrial application value, and can be widely applied to the NH3 selective catalytic reduction of nitrogen oxides in flue gas.

A surgical method and tool for expanding an initial osteotomy (42) to receive a bone implant (44). An osteotome (22) having a tapered working end (28) is inserted into the initial osteotomy (42). The initial osteotomy (42) is enlarged by simultaneously rotating and pushing the working end (28) of the tapered osteotome (22) into the osteotomy (42). When rotated in one direction the burnishing edges (40) concentrate the pushing and rotational force in outward normal and tangential component forces against the interior surface of the osteotomy (42) to incrementally expand the osteotomy (42) with little to no removal of bone material (46). When rotated in the opposite direction the burnishing edges cut the interior surface of the osteotomy. Progressively larger tapered osteotomes (22) are used until an osteotomy (42) of predetermined size is achieved.

The invention discloses a divided mining method for an inclined medium-thick ore body with an unstable false roof. The ore body is divided into panels along the strike, ore pillars of chambers are divided in the panels and a top pillar is reserved during stoping; an outside-vein slice drift, a layered linking roadway and a trackless stope preparation project of a chute mine are distributed on the upper panel of the ore body, and an upward air roadway is filled and is distributed at a position at the center of the ore pillars of the chambers and close to the lower panel; chambers are mined firstly and the ore pillars are mined secondly in the panels, and the chambers and the ore pillars are mined in an up-down layering manner; the stoping is performed from an ore removal crossdrift, the false roof and the ore body are mined in sequence, after ores are conveyed out by a carry-scraper, the false roof at the lower sub-layer is subjected to caving in advance by shallow holes, waste stones of the false roof are reserved in a stoping field, and the ore breaking compensation height is compensated in a layering filling manner, the stoping is performed on the lower sub-layer, and the laying caving is performed on the false roof after layering ore breaking and ore conveyed out, the operation is repeated for multiple times until the stoping field is stoped completely, and the bottom layer of the stoping field is filled to close to the back. By using the method, the operating safety, high mechanical degree, no removal of the waste stones of the false roof, low production cost, and low ore dilution loss can be realized.

The invention discloses a preparation method of a nanosheet self-assembled C-doped (BiO)2CO3 microsphere visible light catalyst, which comprises the following steps: (1) dissolving a bismuth-containing precursor, a soluble carbonate and a doping carbon source in a water solution, stirring for 30 minutes, transferring the obtained mixed solution into a high-pressure hydrothermal kettle, and carrying out hydrothermal reaction at 120-250 DEG C for 3-100 hours; and (2) after the hydrothermal reaction finishes, cooling, filtering out the precipitate, respectively washing the precipitate with deionized water and ethanol, and drying to obtain the nanosheet self-assembled C-doped (BiO)2CO3 microspheres. According to the C-doped (BiO)2CO3 prepared by the method disclosed by the invention, the doping C element reduces the energy gap of (BiO)2CO3, and the (BiO)2CO3 has visible light catalytic activity. The experimental result proves that the NO removal rate of the bismuthyl carbonate photocatalyst disclosed by the invention is 30-45%, which indicates that the bismuthyl carbonate photocatalyst has high visible light catalytic activity.

The invention provides a method for denitrifying NO by directly decomposing NO catalytically by using a supported metal oxide catalyst. The method is carried out in a microwave field. The catalyst is a supported mixed metal oxide catalyst which is characterized in that a mixed metal oxide MOx is supported on an Al2O3 carrier, wherein M is selected from two or three of cerium, copper, manganese and nickel; preferably, the catalyst is selected from CeCuOx/Al2O3, CeMnOx/Al2O3, CeNiOx/Al2O3 and CeCuMnOx/Al2O3. The method has the advantages that secondary pollution is avoided through microwave catalytic direct NO decomposition reaction; the process is simple, is convenient to operate and easy to control, is high in NO removal efficiency (the NO conversion rate can be 95.1%), strong in oxidation resistance and low in operating temperatures, is energy-saving and environment-friendly and is low in operating cost; the flue gases or waste gases treated by using the method can be directly up to the national emission standard.

The invention discloses a method for removing NO (nitric oxide) in flue gas. Gas containing the NO flows through a reactor with the reaction temperature ranging from 400 DEG C to 800 DEG C at airspeed of 1000-10000h-1, from 10 to 40% of main catalyst, from 5 to 30% of auxiliary catalysts and from 30 to 70% of activated carbon are filled in the reactor by total weight of catalyst, and shortcomings that NO removal rate is low and a removal process is complex in the prior art are overcome.

The invention discloses a low-temperature selective catalytic reduction NOx catalyst based on nanometer activated carbon microspheres and a preparation method of the low-temperature selective catalytic reduction NOx catalyst based on the nanometer activated carbon microspheres. The preparation method comprises the following steps of dissolving saccharides, titanium compounds, alkali metal salts and transition metal salts in water according to a molar concentration ratio of 1: 0.01-4:0.5-3:0.01-1 to obtain mixed solution, and adjusting the pH value of the mixed solution into 1-3; and atomizing the mixed solution into aerosol in an ultrasonic way, then inputting N2 or Ar as carrier gas into a tube furnace, conducting calcinations in 300-900 celsius degrees, and obtaining the low-temperature selective catalytic reduction NOx catalyst based on the nanometer activated carbon microspheres. According to the low-temperature selective catalytic reduction NOx catalyst, operation temperature of selective catalytic reduction (SCR) is lowered, and in the SCR technology, a high NO removal rate can be reached below 150 celsius degrees when NH3 is as catalyst. Moreover, when SO2 is contained in a system, higher catalytic efficiency is still kept, and poisoning of SO2 to the system has recoverability.

The present invention relates to semiconductor devices, and more particularly to a process and structure for removing a dielectric spacer selective to a surface of a semiconductor substrate with substantially no removal of the semiconductor substrate. The method of the present invention can be integrated into a conventional CMOS processing scheme or into a conventional BiCMOS processing scheme. The method includes forming a field effect transistor on a semiconductor substrate, the FET comprising a dielectric spacer and the gate structure, the dielectric spacer located adjacent a sidewall of the gate structure and over a source/drain region in the semiconductor substrate; depositing a first nitride layer over the FET; and removing the nitride layer and the dielectric spacer selective to the semiconductor substrate with substantially no removal of the semiconductor substrate.

The invention discloses a preparation method for a lignite semi-coke-based denitration agent used for low-temperature catalytic oxidation. The method prepares lignite semi-coke through high-temperature carbonization; then the lignite semi-coke is used as a carrier, and an alkaline substance and metal oxide are loaded as active components for modification; and ultrasonic equal impregnation is carried out to prepare the modified lignite semi-coke-based catalyst. The catalyst allows the conversion rate of NO to NO2 under catalytic oxidation to reach 87% at a reaction temperature of 100 DEG G; the catalyst has low catalytic activity and can be used for removing NO from a low-temperature emission source of aerobic waste gas; the method has the advantages of simple process, convenient operation, low operation cost, no need for high temperature and no use of an oxidant; and the catalyst prepared by the using the method has a high NO removal rate.

A pattern-transferring film having a print pattern provided on an upper surface thereof is floated on a liquid surface within a transferring bath and an objective body is immersed into a liquid within the transferring bath together with the pattern transferring film under a liquid pressure so as to transfer the print pattern onto the objective body. The print pattern is obtained by being printed by using an optional printing ink or inks of blue, yellow, red black and white inks or an ink or inks prepared by blending the printing inks. The liquid pressure pattern-transferring ink or inks comprise at least a resin ingredient and a color pigment. The resin ingredient of each of the color inks is composed of a fluoropolymer resin and the color pigment of each of the color inks is an inorganic pigment. In this manner, with liquid pressure pattern-transferring ink comprising the resin ingredient of the fluoropolymer resin and the inorganic pigment in spite of its color, all the color printing inks have a weather resistance of 5000 hours or more determined by a JIS based sunshine weather meter. Thus, there occurs no removal of the transferred pattern out of the objective body which tends to be caused by a deterioration of the resin ingredient, if otherwise and the color of the transferred pattern neither changes nor fades, which enables the article to have its life span maintained for a longer period.

The cost for shot-peening is intended to be reduced. The method for shot-peening of the present invention comprises a first step for processing a work by shot-peening by projecting shots onto the work, and a second step for processing the work by shot-peening by projecting the shots onto the work at a speed for projecting the shots that is slower than the speed in the first step, wherein the second step uses the same shot-peening machine and same shots that have been used in the first step. By this method, an intended distribution of compressive residual stresses is obtained by the processes in the first and second steps and the surface roughness of the work is decreased by the process in the second step wherein the shots are projected at the speed that is slower than that in the first step. Further, no removal or supply of the shots and no re-setting of the conditions for the process that are related to the removal and supply of the shots are required. Multiple shot-peening machines do not need to be installed. Thus the cost for shot-peening is reduced.

The invention relates to the field of industrial catalysis and environmental governance, in particular to a catalyst capable of removing N2O, NO and NO2 simultaneously and a preparation method of the catalyst. After tail gas containing N2O, NO and NO2 is subjected to the action of the catalyst, on one hand, N2O gas is decomposed directly, on the other hand, NO gas and NO2 gas are subjected to an SCR (selective catalytic reduction) denitration reaction, and simultaneous removal of N2O, NO and NO2 is realized. The plate catalyst capable of removing N2O, NO and NO2 simultaneously is prepared from V2O5 and a Co-based composite metal oxide as active components, TiO2 as a supporter and one or two of WO3 and MoO3 as a metal additive through mixing, rolling coating, pleating, drying and roasting. The N2O decomposing efficiency of the catalyst in the temperature range of 300-450 DEG C can reach 80% or higher, the NO removal rate and the NO2 removal rate can reach 85% or higher, and the catalyst has excellent oxygen inhibition resistance and water vapor poisoning resistance.

The invention discloses a quaternary composite oxide low-temperature SCR (selective catalytic reduction) catalyst and a preparation method thereof. According to the catalyst, TiO2-ZrO2 serves as a carrier, and a manganese-cerium oxide is loaded on the carrier. The mole ratio of Ti to Zr to Mn to Ce in the catalyst is 1: 1: (0.005-1): (0.005-1). The obtained catalyst has the advantages that SCR operation temperature is reduced, high NO removal rate can be reached at the temperature of 80-180 DEG C when NH3 serves as a reducing agent in the SCR process, high catalytic efficiency can be kept when a system contains SO2 and H2O, and the system harmed by the SO2 can be restored.

The invention discloses a synergistic-denitration type liquid boiler clinker removal agent and a preparation method and application thereof and belongs to the field of clean combustion of coal.The clinker removal agent is prepared from, by weight, 5-20% of magnesium acetate, 1-5% of copper nitrate, 1-5% of nickel nitrate, 2-10% of ammonium nitrate, 3-10% of boric acid, 0.5-2% of cerium nitrate and the balance water.The clinker removal agent is atomized and added into a boiler through jetting, magnesium acetate is decomposed to generate MgO and alkyl (CHi) at the high temperature, the fuel intermediate CHi has reduction action for NO, the content of NO in flue gas can be reduced, the synertistic effect is achieved for denitration, generated nanoscale MgO pores are high in specific surface area, the clinker removal agent can serve as a catalytic carrier of a denitration reaction and also can react with a low-melting-point compound in a clinker layer to raise the clinker melting point so that clinker can be loosened and be crispy, the clinker removal agent is small in consumption and can obviously reduce the boiler coking phenomenon, and meanwhile the good synergistic NO removal effect is achieved.

The invention belongs to the technical field of environmental protection, and relates to the technology of simultaneously removing sulphur dioxide and oxynitride in flue gas of a boiler, in particularto a mixed solution for simultaneously desulfurizing and denitrating and an application method thereof. The mixed solution is characterized in that: the mixed solution is prepared from the followingchemical compositions: 0 to 30 mass percent of sodium carbonate solution and 0 to 30 mass percent of sodium chlorite solution. The mixed solution is nontoxic and harmless, is moderate in price, has aSO2 removal rate of 80 to 90 percent and a NO removal rate over 60 percent, and can be produced in batches on a large scale.

The invention provides a macroporous Ce-Zr based composite metal oxide catalyst, a preparation method, and an application thereof. The composite metal oxide catalyst is a Ce-X-Zr composite oxide and has the constitution of Ce0.8X0.1Zr0.1O2, wherein X is Fe, Mn, Co or Ni. The preparation method includes the steps of in-situ-doping and dissolving one of an iron source, a manganese source, a cobalt source and a nickel source in a cerium source and a zirconium source, and performing carbon template supporting process to synthesize the composite metal oxide. The catalyst can reduce the temperatures of catalytic combustion of PM into CO2 and catalytic reduction of NO into N2 into the same range, and also is improved in activities of catalyzing the PM combustion and NO conversion rate. The preparation method is simple and has short period and low cost. The catalyst is suitable for PM and NO removal in tail gas of diesel vehicles and has excellent application prospect.