56 results about "Reducing agent" patented technology

An engine controller determines the cost of operating a combustion engine and the cost of operating an emissions after-treatment device. Accordingly, the engine controller adjusts parameters for operation of the engine and the after-treatment device to ensure cost-effective use of the engine and the after-treatment device while complying with exhaust emissions requirements. In particular, the engine controller receives the price of fuel consumed by the engine and the price of reductant used by the after-treatment device to determine the respective cost of operation. Specifically, the fuel is diesel fuel used in a diesel engine; the reductant is urea use in a urea-based Selective Catalytic Reduction (SCR) system; and the regulated exhaust emissions is nitrogen oxide (NOx) emissions. The engine operating parameters may include cooled exhaust gas recirculation airflow, fuel injection timing, fuel injection pressure, and air-to-fuel ratio. The SCR system operating parameters may include the volume of urea injected.

The invention provides a synergetic metal recycling method for nickel and cobalt containing waste batteries and copper containing electronic waste. The preliminarily smashed and metal element enriched waste batteries and the copper containing electronic waste are mixed, and a slag former and a reducing agent in a certain ratio are blended for an oxidative reducing reaction; relatively active metal iron, aluminum and the like in the reaction process form oxide to enter an upper layer slag phase; metal cobalt and nickel enter copper liquid on the bottom layer, and therefore the metal phase and a slag phase are separated, and metal containing copper, cobalt and nickel is obtained; and copper, cobalt, nickel and other high-purity metal are recycled through electrorefining. The method is short in flow, high-temperature thermometallurgy is adopted for synergetically recycling the valuable metal in the batteries and the electronic waste, and the problems that traditional waste battery wet recycling efficiency is low, the environment is polluted, a large amount of lixivium needs to be used, and a large amount of acid and alkaline is consumed are avoided; and an efficient novel recycling way is provided for waste ternary battery and electronic waste resource recycling, and good industrial application prospects are achieved.

The invention belongs to the technical field of a refractory castable, and particularly relates to a castable for a blast-furnace tapping channel and a preparation method thereof. The castable comprises the following components: 55-80wt% of fused brown corundum, 8-21wt% of silicon carbide, 0.01-5wt% of carbon source, 2-8wt% of alpha-alumina micro powder, 1-7wt% of fused white corundum, 0.5-5wt% of silica powder, 1-5wt% of calcium aluminate cement, 0.3-4wt% of elemental silicon powder, 0.01-0.4wt% of water reducing agent, 0-0.2wt% of organic fibers and 0-0.2wt% of aluminum powder. The preparation method comprises the steps of dry-blending the components for 10-180 seconds, additionally adding water accounting for 4-6wt% of the raw materials, and stirring for 1-8 minutes so as to obtain the castable. Carbon nanotubes are introduced to the castable for the tapping channel so as to partially or totally replace spherical asphalt and be uniformly distributed in the castable, and can be filled into tiny gaps so as to improve the compactness of the castable, so that the anti-erosion and anti-scouring properties of the castable are improved, toxic smog formed in the process of baking the spherical asphalt is reduced, and the body injury of workers and the environmental pollution caused by the toxic smog are reduced; the castable has the characteristics of excellent properties, long service life and environmental friendliness.

The invention relates to a water-reducing polycarboxylic concrete slump retaining agent and a preparation method thereof. The molecular weight of the water-reducing polycarboxylic concrete slump retaining agent ranges from 18000 to 48000, and the structural general formula of the water-reducing polycarboxylic concrete slump retaining agent is expressed by a formula I shown in the specification, wherein m ranges from 1 to 10, n ranges from 5 to 20, p ranges from 4 to 10, q ranges from 1 to 7 and k ranges from 1 to 10. Compared with the existing slump retaining agent, the water-reducing polycarboxylic concrete slump retaining agent has the advantages that a carboxylic acid group is capable of functioning in delaying coagulation and retaining slump, while an alcoholic hydroxyl group is capable of functioning in delaying coagulation, the molecule of itaconic acid introduced in the molecular structure of the water-reducing polycarboxylic concrete slump retaining agent contains two -COOHs, and thus is capable of complexing with Ca2<+> and effectively delaying cement hydration, a sulfonic acid group introduced in the molecular structure of the slump retaining agent is capable of dispersing cement particles at first and delaying cement hydration, and a benzene ring in the molecular structure is easy to generate steric-hinerance effect and enhances the dispersion stability of the water-reducing agent; besides, the water-reducing polycarboxylic concrete slump retaining agent is obvious in slump retaining effect, and is low affected by weather; when being matched with other additives for use, the water-reducing polycarboxylic concrete slump retaining agent is good in compatibility with other additives; the slump retaining agent is capable of obtaining efficient slump retaining effect by a dosage within a low range.

The invention discloses colored continuous-phase silicone-acrylic emulsion reactable with protective glue, prepared from, by weight, 130-180 parts of water, 50-90 parts of methyl methacrylate, 60-90 parts of 2-ethylhexyl acrylate, 10-20 parts of butyl acrylate, 0.5-9 parts of hydrophilic unsaturated organic acid, 3-7 parts of a functional monomer, 0.3-2.5 parts of an anionic emulsifier, 0.2-2 parts of an initiator, 0.05-0.25 part of an oxidant, and 0.05-0.25 part of a reducing agent; the prepared colored continuous-phase silicone-acrylic emulsion reactable with protective glue has excellent transparency, weatherability and paint formulating stability, can engage in directional crosslinking reaction with protective glue, and has excellent water resistance and water white resistance as no thickeners are added to the colored continuous phase.

The invention provides plant growth type porous concrete suitable for plant growth. The concrete comprises a porous concrete body with thickness and mixed fine loam covering the surface layer of the porous concrete body. The porous concrete body comprises components by volume density as follows: 150-325 kg/m<3> of cement, 1,495-1,550 kg/m<3> of ceramsite, 40-86 kg/m<3> of fly ash, 10-12 kg/m<3> oflimestone powder, 100-120 kg/m<3> of fine loam, 2-3 kg/m<3> of plant ash, 15-30 kg/m<3> of rice husk charcoal, 2.5-4 kg/m<3> of a water reducing agent, 10-20 kg/m<3> of EVA latex powder, 17-40 kg/m<3> of butadiene-styrene rubber powder, 13-23 kg/m<3> of a polyacrylate emulsion, 20-30 kg/m<3> of organic compost, 15-20 kg/m<3> of vermiculite, 2-3 kg/m<3> of seaweed meal, 0.5-0.7 kg/m<3> of tea seedmeal, 2-3 kg/m<3> of neem cakes, 0.7-1.2 kg/m<3> of polyacrylamide, 0.5-1 kg/m<3> of ferrous sulfate, 3-4 kg/m<3> of modified loofah fiber, 0.8-1 kg/m<3> of an organic silicon defoamer and 60-90 kg/m<3> of water.

The invention discloses preparation of fluorogold nano-clusters and application of the fluorogold nano-clusters to tetracycline and copper fluorescent probes. The fluorogold nano-clusters (Au NCs) aresynthesized with a one-step method from casein separated from milk and carbon quantum dots as a stabilizer and a reducer for synthesis of the Au NCs. The Au NCs perform emission three times at 433 nm, 702 nm and 1052 nm under the excitation wavelength of 350 nm, tetracycline has a linear quenching effect at 702 nm, Cu<2+> is added to an Au NCs system after quenching, fluorescence recovers, and fluorescence intensity at 1052 nm is almost not affected in the overall process; tetracycline is added to the Au NCs, observation is carried out under a UV (ultraviolet) lamp with wavelength of 365 nm,red fluorescence of the Au NCs changes into yellow fluorescence, and after addition of Cu<2+>, the yellow fluorescence disappears gradually and the red fluorescence recovers gradually. Therefore, a near-infrared ratio fluorescence switch for tetracycline and Cu<2+> and UV visual dual-signal detection are established. The method has the advantages of adopting a fluorescence spectrum in a near infrared region and being small in interference, high in specificity and detection sensitivity, convenient to operate and capable of detecting tetracycline and Cu<2+> simultaneously.

The invention discloses a low-density cement paste system for salt-cavern gas storage well cementation. The low-density cement paste system is composed of an oil well cement, a superfine cement, a lightening admixture, a salt resisting and water-loss reducing agent, a defoamer and a saline, and used for gas storage well cementation in a rock salt formation. Due to use of a special salt resisting ingredient, the corrosion of the cement paste to the wall of a salt deposit well is retarded, adverse impact of the salt rock diffusing to the cement paste on the properties of the cement paste is reduced, and such technical problems affecting the quality of sealing and cementation in well cementation as retarded coagulation and extra retarded coagulation of cement paste, and low strength of set cement are well solved.

The invention relates to a method pertaining to an SCR system for exhaust cleaning, whereby reducing agent is supplied to a feed device (230) which supplies it to a dosing unit (250) for batched supply of reducing agent by means of a valve arrangement (350, 360) at a consumption point in the SCR system. The method comprises the steps of - continuously determining (s410) the cumulative number of doses injected (N) by said dosing unit (250), - continuously comparing (s420, s430) said cumulative number of doses injected (N) with a predetermined numerical value (TH), and - delivering an indication (s440) when said cumulative number of doses injected (N) exceeds said predetermined numerical value (TH). The invention relates also to a computer programme product comprising programme code (P) for a computer (200; 210; 500) for implementing a method according to the invention. The invention relates also to an SCR system and a motor vehicle (100; 110) equipped with the SCR system.

The invention relates to a reductant supply system for a waste gas cleaning catalyst ( 1 ) of an internal combustion engine, particularly a motor vehicle, comprising a reductant tank ( 3 ) for the storage of reductants, at least one electrically heatable fluid duct ( 6, 8 ) for the conveyance of reductant from the reductant tank ( 3 ) to a waste gas cleaning catalyst ( 1 ), a pump ( 5 ) to pump the reductant via the fluid duct ( 6, 8 ) from the reductant tank ( 3 ) to the waste gas cleaning catalyst ( 1 ), and a plug-in connection ( 10, 11 ) for connecting sections of the fluid duct ( 6, 8 ) in a fluid-conveying manner and/or connecting the fluid duct in a fluid-conveying manner to a component of the reductant supply system, wherein the plug-in connection additionally forms an electric connection line ( 12, 13, 14 ); which in operation conveys an electrical heating current for heating of the fluid duct ( 6, 8 ). The invention relates also to a plug-in connection ( 10, 11 ) for connecting a heatable fluid duct section ( 8 a, 8 b) as well as a female connector ( 10 ) and a male connector ( 11 ) of such plug-in connection.

The invention discloses a weather-resistant impact-resistant waterproof plugging material with stable quality. The material comprises the following raw materials by weight: 1-2 parts of a water reducing agent, 15-25 parts of polyvinyl alcohol, 10-20 parts of a tackifying promoter, 30-40 parts of a polyurethane prepolymer, 20-30 parts of a magnesium acrylate emulsion, 10-16 parts of ore filling, 3-5 parts of white carbon black, 2-4 parts of a nanometer additive, 5-9 parts of dispersible adhesive powder, 3-7 parts of a weather-resistant aid, 10-14 parts of reinforced fibers and 10-12 parts of water. The waterproof material provided by the invention has the characteristics of stable performance, resistance to cold and heat impact, aging resistance, no cracking, no deformation and superior waterproof performance and impermeability; the material has excellent impact fatigue resistance in outdoor usage and can effectively resist high-frequency repeated impact by heavy rain and hail; the raw materials of the material are safe, reliable, friendly to environment, easily available and cheap; the preparation method for the material is simple; so the material provided by the invention has high practical value and good application prospects.

The instant disclosure relates to hair coloring base compositions and developer compositions that can be incorporated into a hair color cartridge, which combines the compositions and dispenses them onto hair. The hair color cartridge includes: (a) one or more hair coloring base compositions and; (b) one or more developer compositions, which can be combined to form an active hair coloring composition and dispensed onto hair. The hair coloring base compositions typically include one or more oxidative dye precursors; one or more alkalizing agents; one or more reducing agents; optionally, one or more cationic conditioning polymers; one or more surfactants; one or more water-soluble solvents; and water. The developer compositions typically include one or more oxidizing agents; one or more surfactants; and water. The unique components and fluid characteristics of the various compositions are such that devices or appliances comprising them accurately combine and dispense the hair coloring base composition(s) with the developer composition(s) in a predetermined ratio with excellent consistency for application to hair.

The invention provides a cyclone furnace denitration system and method. The cyclone furnace denitration system comprises a cyclone cylinder combustor and a reducing agent storage tank which are connected with the cyclone furnace; an SNCR first nozzle is arranged at the upper part of a hearth of the cyclone furnace, and an SNCR second nozzle is arranged in the top of a hearth flue; the axial direction of the cyclone cylinder combustor is vertically mounted on the outer side wall of the lower part of the hearth of the cyclone furnace, the side wall of the cyclone cylinder combustor is provided with an amino reducing agent first nozzle, and an amino reducing agent second nozzle is arranged on the side wall of the hearth above the cyclone cylinder combustor; a primary air inlet is formed in the axial direction of the cyclone cylinder combustor, and a secondary air inlet is oppositely arranged in the tangential direction of the side wall; the reducing agent storage tank is correspondingly connected with the SNCR first nozzle, the SNCR second nozzle, the amino reducing agent first nozzle and the amino reducing agent second nozzle through a reducing agent conveying pipe. The cyclone furnace denitration system and method has the advantages that the process flow is simple, the storage and conveying equipment of the SNCR denitration reducing agent is fully utilized, a new reducing agentstorage and conveying device does not need to be added, so that a new combined denitration system is formed, and the low emission of NOx of the cyclone furnace is realized.

The invention discloses a concrete high-efficiency water reducer. The water reducer comprises the following raw materials in parts by weight: 20-40 parts of unsaturated alcohol-polyoxyethylene ether,10-30 parts of sodium lignin sulfonate, 10-20 parts of acrylic acid, 5-10 parts of modified starch, 3-8 parts of aloe gel, 2-6 parts of cyclodextrin, 2-5 parts of cross-linked povidone, 2-5 parts of zinc gluconate, 1-3 parts of sodium polystyrenesulfonate, 1-3 parts of sodium alginate, 0.5-2 parts of graphene oxide, 0.2-1 part of sodium silicate, 0.1-0.5 part of a defoaming agent and 3-5 parts ofan initiator. The high-efficiency water reducer prepared by the method is good in stability, and can increase workability of concrete when used in the concrete. In addition, the water reducer can be mixed with other water reducing agents for use, the water adding amount is reduced, the solidification time of concrete is shortened, and strength of the concrete is improved.

The invention discloses high-strength crack-resistant concrete. The main materials used in the concrete include the following raw materials, in parts by weight, 30 to 35 parts of stone, 8 to 10 partsof cement, 20 to 23 parts of sand, 5 to 6 parts of water, 0.3 to 0.5 part of water reducing agent, and 2 to 3 parts of fly ash. The auxiliary materials used in the concrete include the following raw materials, in parts by weight, 8-10 parts of expanded polystyrene granules, 2-4 parts of lignocellulose, 3-4 parts of polypropylene fiber, 4-6 parts of fluororubber, 2-4 parts of quartz sand, 6-10 parts of feldspar, 0.2-0.6 part of sodium silicate, 4-8 parts of boric acid, and 2-3 parts of sodium hydrogencarbonate. According to the invention, the tensile strength of the whole concrete can be enhanced and the concrete can be prevented from breaking by adding the glass wool fiber into the raw materials, and with addition of expanded polyphenyl granules, lignocellulose, polypropylene fiber and fluororubber, the elasticity of the concrete is increased, and when subjected to strong impact, the concrete does not break immediately, thereby avoiding splashing after particle breakage.

The invention discloses a method for preparing a silver micron hollow frame structural material. The method comprises the following steps of firstly, preparing a AgNO3 aqueous solution at the room temperature, then, adding the appropriate quantity of a structure-directing agent HF and a reducing agent FeSO4 into the AgNO3 aqueous solution to form a mixed solution and furthermore, enabling the mixed solution mentioned above to stand in water bath of a certain temperature, keeping for a period of reaction time, and obtaining the silver micron hollow frame structural material after carrying out centrifugation, washing and drying on a product. The method for preparing the silver micron hollow frame structural material is simple, and with the method, large-scale production of the silver micronhollow frame structural material is realized.

The invention relates in particular to a reservoir for a urea-based reducing agent, with an integrated electric heating element, usable on a heat engine vehicle for pollution control. The heating element (10) provided to thaw the reducing agent (6) is placed inside a cavity (16) delimited by a bowl (13), itself placed inside the reservoir (1). The cavity (16) of the bowl (13) communicates with the inner volume (5) of the reservoir by a valve (20). A suction pipe (12) for the reducing agent is submerged in the cavity (16) of the bowl (13), the starting point (18) of said pipe being situated near the heating element (10). Operation is thus guaranteed when the vehicle is under sloping and inclined conditions, and also in case of freeze.

The invention relates to a novel ink which comprises printing ink, a mixing agent A, a mixing agent B and a brightening agent The parts by weight of the printing ink is 1,500 parts ; the mixing agent A comprises 10-15 parts of viscosity reducing agent and 15-25 parts of varnish; the mixing agent B comprises 5-15 parts of white drying paste and 3-6 parts of fine flour; and the brightening agent is 10-20 parts by weight, wherein the printing ink, the viscosity reducing agent, the varnish, the white drying paste, the fine flour and the brightening agent are common commodities sold in market; and the fine flour is preferably corn flour. The novel ink can print high-grade gold foil paper, aluminum foil paper and various metal paperboards on a common offset machine without the limitation of temperature and printing equipment, has the printing effect which is the same with imported temperature control multicolour printing equipment, high fineness, short drying time and high printing speed and greatly reduces the printing cost.

The invention discloses a preparation method of a SnS2 nanosheet loaded graphene-based nano composite material, which comprises the following steps: step 1, dispersing graphene oxide nanosheets in deionized water to prepare a graphene oxide solution; 2, dissolving tin tetrachloride in deionized water, and adding thiourea as a sulfur source and a reducing agent; 3, adding the graphene oxide solution in the step 1 into the solution obtained in the step 2, and carrying out mixing treatment through ultrasonic waves and transferring a mixture of the two solutions subjected to ultrasonic treatment into a hydrothermal reaction kettle for reaction to obtain a precipitate; and 4, centrifuging, washing, drying and grinding the precipitate obtained by the reaction in the step 3 to obtain the graphene nanosheet/tin disulfide composite nanomaterial. The graphene nanosheet/tin disulfide composite nanomaterial prepared by the method has higher capacity and stability when being used as a sodium storage electrode material.

A highly water-retaining water-permeable brick prepared from a building recycled material and a preparation method thereof are disclosed. The brick comprises, by mass, 30-50 parts of a recycled fine aggregate, 30-50 parts of reclaimed sand, 1-3 parts of waste paper pulp, 2-5 parts of activated fly ash, 15-30 parts of Portland cement, 2-5 parts of an adhesive, 0.3-1 part of a composite water retention material, 0.2-0.5 part of lignin fiber, 0.5-1 part of industrial waste acid residue, 0.5-1 part of a water reducing agent, 0.5-3 parts of mineral pigment, 0.3-0.5 part of a water permeability agent and 10-20 parts of water. The water absorption and water retention properties of the brick are improved, raw materials are environmentally friendly and easily available, and a preparation process issimple.

The invention discloses concrete for a prefabricated part and a preparation method thereof, which relate to the technical field of concrete, and solve the problems that harmful substances such as acidand alkali ions are easy to permeate inwards through tiny gaps and cracks of the concrete, so that the volume of a steel bar is expanded, and the prefabricated part is damaged. The concrete for a prefabricated part comprises the following components in parts by weight: 180-200 parts of Portland cement, 170 to 180 parts of water, 720 to 760 parts of medium sand, 1020 to 1050 parts of broken stone,70 to 80 parts of fly ash, 170 to 190 parts of mineral powder, 3 to 5 parts of a water reducing agent, 2 to 3 parts of a retarder, 4 to 8 parts of an anti-permeability agent, 6 to 10 parts of methylsodium silicate, 5 to 9 parts of triethoxysilane, and 15 to 35 parts of organic silicon water-soluble resin. The concrete for the prefabricated part has excellent chemical corrosion resistance, has agood protection effect on steel bars in the prefabricated part, and is good in overall application effect.

The invention relates to the field of building materials, and particularly discloses a shield grouting material and a preparation method thereof. The shield grouting material is prepared from the following raw materials in parts by weight: 80 to 120 parts of cement, 180 to 300 parts of fly ash, 200 to 350 parts of sand, 50 to 80 parts of bentonite, 2 to 4 parts of a thickening agent, 0.5 to 1.5 parts of an expanding agent and 0.5 to 3 parts of a water reducing agent, the thickening agent is prepared from silica fume, hydroxypropyl methyl cellulose and diallyl phthalate; the shield grouting material prepared by the invention has a relatively high condensation speed.

The invention discloses an additive-free odorless acrylate emulsion with super stain resistance. The emulsion is prepared from the following raw materials in parts by weight: 100-160 parts of water, 10 to 15 parts of methyl methacrylate; 20-30 parts of styrene, 40 to 55 parts of butyl methacrylate, 30 to 45 parts of tert-butyl acrylate, 1 to 6 parts of methacrylic acid, 0.5 to 2 parts of trifluoro-ethyl acrylate, 2 to 10 parts of a functional monomer, 2 to 10 parts of an emulsifier, 0.1 to 0.5 part of persulfate, 0.1 to 0.5 part of an oxidant, 0.1 to 0.5 part of a reducing agent and 2 to 10 parts of a pH regulator. When the acrylate emulsion is used for a coating, an anti-freezing agent does not need to be added, and the acrylate emulsion has the advantages of super stain resistance, low odor, environmental friendliness and the like.

The invention discloses a preparation process and system for producing a high-grade titanium-rich material by utilizing ilmenite, and belongs to the field of chemical engineering and metallurgy. The preparation process comprises the following steps: putting ilmenite concentrate into a first rotary kiln, and then adding a reducing agent and a desulfurizing agent for primary reduction, so as to obtain a reduced material I; enabling tail gas to pass through high-temperature cyclone dust removal equipment, an oil-gas separator, a Roots blower and a gas holder in sequence, and finally, conveying reducing gas to a second rotary kiln; cooling the reduced material I, and then removing impurities through a screening machine and a magnetic separating machine, so as to obtain a pure uniform-particle-size ferrotitanium inlay; feeding the ferrotitanium inlay to the second rotary kiln for secondary reduction, so as to obtain a reduced material II; and cooling the reduced material II, and performingthe grinding-separating operation and the magnetic separating operation in sequence, so as to obtain an iron product and the titanium-rich material. The preparation process has no restriction on the selection of raw materials; the equipment failure rate is low; the treatment of tail gas is simple; the environment-friendly and energy-saving properties are achieved; the metallization rate of the obtained iron product reaches 98% or higher; the content of titanium dioxide in the titanium-rich material is higher than 90%; and the number of particle meshes and the density meet the product requirements.

The invention provides a divided type dental polymeric core build-up material including a first paste (A) and a second paste (B), in which each of the pastes is a paste obtained by mixing at least a (meth)acrylate monomer, a filler having a particle size distribution within a range of 0.1 through 40 μm and an average particle diameter of 0.7 through 10 μm, and a fine particle filler having an average particle diameter of primary particles of 0.001 through 0.050 μm, and having a viscosity at 25° C. of 280 through 470 P, and in which one of the pastes includes an oxidant and the other includes a reductant and at least one of the pastes includes a photopolymerization catalyst. The divided type dental polymeric core build-up material of this invention has high operability in core build-up and forms a polymerically cured substance with a good mechanical property.