2334 results about "Nitrate salts" patented technology

The invention relates to a manufacturing mode of environment-friendly and energy-saving M15_M85 methanol diesel oil. The methanol diesel oil is composed of diesel oil, methanol, and additives. The methanol diesel oil is prepared with operations under normal temperatures and normal pressures. The invention discloses a plurality of common additives used for preparing methanol diesel oil in modern times. If explosives and aviation fuels are appropriately utilized, methanol defalcated heat value can be well compensated. The theory is tentatively considered as a gaseous detonation theory. The additives can be selected from nitric acid esters, nitrates, nitro compounds, non-aromatic compounds, peroxides, and the like.

The invention relates to aerobic denitrifying paracoccus denitrificans and application thereof. A bacterial strain provided in the invention is paracoccus denitrificans DN-3CGMCC No. 3658; the Paracoccus denitrificans can carry out aerobic denitrification by using nitrate nitrogen under both aerobic and oxygen-limited conditions and can also carry out heterotrophic nitrification-aerobic denitrification by using ammonia-N, and a total nitrogen removal rate on above mentioned occasions is greater than 90%. The paracoccus denitrificans provided in the invention has stable hereditary features, isapplicable to treatment of a variety of nitrogen-containing waste water and produces a good nitrogen removal effect.

The invention discloses a nitrate molten salt heat transferring and reserving medium and a preparation method and application thereof. The nitrate molten salt heat transferring and reserving medium is prepared with 5 to 40 percent of potassium nitrate, 5 to 25 percent of sodium nitrate, and 10 to 70 percent of calcium nitrate. The melting point of the nitrate molten salt heat transferring and reserving medium can be as low as 120 DEG C, and the upper limit of temperature for use can reach 550 DEG C, the nitrate molten salt heat transferring and reserving medium has a wide temperature scope of application, can work normally at the temperature scope of 180 DEG C to 550 DEG C, and has good thermal stability; the shortcoming of high melting point of binary nitrate molten salt system can be overcome, and the problem of instability caused by easy oxidative decomposition at high temperature of NaNO2 in the Chinese patent 200110027954.1 and ternary nitrate salt system can be solved, and the problems of corrosion and cost increase caused by the existing LiNO3 in the Chinese patent 00111406.9 and the American patent US007588694B1 can also be solved.

The invention provides a method for preparing high base number (TBN400) synthetic calcium alkyl-benzene sulfonate. The method comprises the following steps of: adopting a mixed acid of long-chain linear alkyl-benzene sulfonic acid and high-boiling heavy alkyl-benzene sulfonic acid, calcium oxide and/or calcium hydroxide, low-carbon alcohol, alkaline-earth metal halide or nitrate, and a mixture of alkaline-earth metal alkylphenol or alkaline-earth metal alkylphenate and polyisobutylene succinic anhydride for a neutralization reaction in the presence of a solvent and cutback oil at a temperature of between 40 and 80 DEG C; then, passing through carbon dioxide to a product of the neutralization reaction at a temperature of between 40 and 60 DEG C for a carbonation reaction; and producing high base synthetic alkyl-benzene sulfonate with a total base number (TBN) of 400mgKOH/g by adopting a process of a one-step method. The product is divided into high-base number (TBN400) synthetic alkyl-benzene sulfonate containing chlorine and high-base number (TBN400) synthetic alkyl-benzene sulfonate without the chlorine. The product produced by adopting the method with low viscosity, small turbidity, easy filtration, light color and no skin formation has the advantages of excellent high-temperature detergency, excellent anti-foaming property and excellent heat storage stability.

PCT No. PCT/GB96/00488 Sec. 371 Date Oct. 22, 1997 Sec. 102(e) Date Oct. 22, 1997 PCT Filed Mar. 1, 1996 PCT Pub. No. WO96/26902 PCT Pub. Date Sep. 6, 1996A method for producing precipitated calcium carbonate by reacting an aqueous solution of calcium nitrate [Ca(NO3)2] with an aqueous solution of ammonium carbonate [(NH4)2CO3] and allowing calcium carbonate to precipitate from the resultant mixture containing nitrate [NH4NO3] in the mother liquor, the process being characterized in that: (i) the calcium nitrate [Ca(NO3)2)] solution utilized in the processes is prepared by slaking lime [CaO] in water in the presence of ammonium nitrate [NH4NO3] to form calcium nitrate [Ca(NO3)2] and ammonium hydroxide [NH4OH] in solution, filtering the solution to render it solids free, and heating the filtrate to dissociate the ammonium hydroxide [NH4OH] and to drive ammonia gas [NH3] from the solution; (ii) the ammonium carbonate (NH4)2CO3 solution utilized is prepared by absorbing ammonia gas [NH3] and carbon dioxide gas [CO2] in water, the ammonia gas preferably being derived from the step in (i) above in which the Ca(NO3)2 solution is heated; and (iii) the ammonium nitrate used is derived from the precipitation phase during which calcium carbonate is precipitated from the mother liquor containing ammonium nitrate.

The invention relates to a recycled flue gas desulfurization and denitration method, which sequentially comprises the following steps of: introducing flue gas of SO2 and NOx into a desulfurizing tower, and absorbing the SO2 with a desulfurizing agent (barren liquor) in the desulfurizing tower; desorbing the desulfurizing agent (rich liquor) which absorbs the SO2 through a multi-effect evaporator,releasing the SO2 gas, and concentrating the SO2 gas into liquid SO2 through condensation drying; making the desulfurized flue gas enter a denitration tower, injecting gaseous ozone from an ozone generator, oxidizing the NO in the flue gas, absorbing the oxidized NO by using a denitrifier to form nitrate; crystallizing and separating out the nitrate in the solution after the nitrate reaches certain concentration, and filtering and drying to obtain the nitrate product. The method turns the wastes into wealth, and the SO2 and NOx in the flue gas are recycled by higher-additional value liquid SO2 and nitrate products, so that the recycling and value maximization in the desulfurization and denitration process is realized. Due to the adoption of the technical scheme, the high desulfurization and denitration rate can be achieved, the desulfurization rate is over 96 percent, the denitration rate is more than 90 percent, and the purity of the nitrate product is over 96 percent. The method hasthe advantages of simple desulfurization and denitration process, low investment, and low operation cost for desulfurization and denitration, and solves the problems that the conventional desulfurization and denitration process has high cost, generates a side product of a mixture of sulfuric acid (sulfate) and nitric acid (nitrate), and has low additional value.

The invention relates to a desulfurizing agent for reforming stock oil and a preparation method thereof, in particular to the desulfurizing agent used for desorbing sulfides in the reforming stock oilsuch as H2S and the like. The desulfurizing agent is characterized by consisting of 10%-40% of ZnO, 15%-22% of NiO, 10%-17% of Al2O3, 5%-22% of SiO2 and the balance inevitable impurities. The desulfurizing agent takes zinc and nickel as active components and bentonite (or diatomite, or white clay, or zeolite, or high-alumina cement and or common cement) as a carrier, and active components thereofare directly present in the form of oxides of zinc and nickel or oxides transformed by corresponding carbonate (basic carbonate) and nitrate. In the invention, the desulfurizing agent has enlarged raw material range, thus effectively reducing raw material cost, simplifying production process of the desulfurizing agent, lowering production cost, improving strength to more than twice, and prolonging service life of the desulfurizing agent.

The present invention provides corrosion inhibition formulations and compositions for inhibiting mineral scale and the corrosion of metals particularly the cavitation corrosion of aluminum in the presence of aqueous liquids. The combination of a mixture of polymeric polycarboxylates, azoles, nitrate salts, phosphates, stabilized silicates and transition metal compounds provide a synergistic protective effect against the cavitation corrosion of aluminum in aqueous liquids reducing the corrosion rate and is effective at relatively low concentrations and varying pH ranges. The addition of selected polymeric polycarboxylates not only significantly reduces glycol based coolant cavitation erosion-corrosion, heat rejecting aluminum corrosion, and hard water precipitates and scale, it has been discovered that polymeric polycarboxylates in combination with siloxane stabilized silicates enhance secondary silicate stabilization leading to improvement in aluminum corrosion protection and coolant life when utilized with selected amounts of the above-identified additives. The formulations are particularly suitable for automotive applications.

The invention relates to a Kocuria palustris strain and applications thereof. The strain is Kocuria palustris FSDN-A, and is preserved in the China General Microbiological Culture Collection Center on July 14, 2011, wherein a preservation number is CGMCCNO.5061. According to the present invention, the strain can adopt nitrite nitrogen or nitrate nitrogen as a substrate to complete a denitrification process; when the Kocuria palustris FSDN-A is adopted to treat ammonia-containing wastewater, characteristics of simple process, high denitrogenation activity, and high concentration organic carbon source tolerance are provided; after the strain is poured, the system is rapidly started; and the strain has broad application prospects in wastewater denitrogenation treatment processes, and is especially suitable for treatment of wastewater containing nitrogen oxides and organic pollutants.

The invention relates to a formula and a corresponding preparation technology of a normal temperature formaldehyde removal catalysis material, and belongs to the technical fields of normal temperature adsorption catalysis and air pollution treatment. The catalysis material is prepared by adopting a one-step co-precipitation process or a step-by-step dipping process to load active components with granular, cylindrical, spherical or honeycomb high-specific surface area shell activated carbon as a carrier, one or more non-noble metal salts as main active components, such as nitrate, sulfate or chloride of manganese, iron, cobalt, nickel, copper, zinc, lanthanum or cerium, one or more alkali metal/ alkaline earth metal salts as an inorganic additive, such as oxalate, nitrate, sulfate, acetate, carbonate and bicarbonate of sodium, potassium, magnesium, calcium, and ethylenediamine tetracetic acid/ethylenediamine tetraacetic acid salt, basic amino acid, polyamide monomer and polyurethane monomer as a nitrogen-containing organic additive. The normal temperature formaldehyde removal catalysis material has the characteristics of rapid capture, high efficiency catalytic oxidation and long working cycle, and can meet requirements of long-time effective removal of formaldehyde in indoor real environment.

Ammonium sulfate nitrate composite materials useful as fertilizers having desirable levels of nitrate ions, superior stability against detonation, higher density, greater resistance to moisture, and a method for their manufacture. The ammonium sulfate nitrate composites have as essential constituents ammonium sulfate and the NH4SO4.2(NH4NO3) double salt with less than 5 wt. % in combined total of the more hazardous NH4SO4.3(NH4NO3) double salt and ammonium nitrate. The composites of the invention are formed by reacting ammonium sulfate with ammonium nitrate in a molar ratio of about 0.9:1 to about 1.1:1 in the presence of a small amount of water in a narrow range of temperatures and then cooling to solidification at a sufficiently rapid rate to prevent macroscopic segregation of the reaction products.

The invention relates to a heat-transfer heat-accumulation medium prepared by combining quartz sand and a multi-composition molten nitrate salt and a preparation method, and belongs to the field of solar photo-thermal power generation. The heat-transfer heat-accumulation medium is composed of a multi-composition molten nitrate salt system and quartz sand. The invention also provides the preparation method of the heat-transfer heat-accumulation medium. The heat-transfer heat-accumulation medium disclosed by the invention keeps the low melting point of the multi-composition molten nitrate salt, and also helps to improve the upper limit operating temperature of the multi-composition molten nitrate salt, and the upper limit operating temperature is up to 700 DEG C. The heat-transfer medium is low in cost, wide in operating temperature range, good in heat stability and high in thermal conductivity, and is extremely suitable for a solar thermal power generation system and a heat-accumulation heat-transfer system based on solar photo-thermal power generation.

Hyperbranched macromolecules and methods are described for selectively filtering contaminants such as anions from water and non-aqueous solutions, particularly in the presence of competing contaminants including other anions. The hyperbranched macromolecules may contain alkyl, 2-hydroxyalkyl, 2-methyl-2-hydroxylalkyl, 2-hydroxy-2-phenylalkyl, and other groups, which may be hydrophilic or hydrophobic. The molecules may preferentially bind to the contaminant at interest at low pH, and release the contaminant at a pH of about 9. The molecules may be used to filter contaminants including perchlorate and nitrate even in the presence of high sulfate concentrations.

The present invention is catalyst for water vapor reformation of ethanol to prepare hydrogen and its preparation process and use. The catalyst is composite alumina and silica carrier supported Ni-Fe, Ni-Co, Ni-Cu, Ni-Zn, Cu-Zn, Cu-Co, Ni-Zr, NiO-LaOx, NiO-CeOx, NiO-YOx, NiO-MgOx or NiO-SrOx. It is prepared through the following steps: preparing catalyst carrier; compounding mixed solution of two kinds of nitrate; prepared turbid liquid of catalyst carrier; adding the mixed solution into the turbid liquid through stirring, evaporating water, stoving, grinding and baking. The catalyst has simple preparation process, low use temperature, high ethanol converting rate, and other advantages.

The invention discloses a process for treating nitrogen-containing wastewater by ion exchange and reclaiming ammonium nitrate, and belongs to the technical field of environmental protection and wastewater treatment. The process is characterized in that: a strong acid cation exchanger and a weak alkali anion exchanger are connected in series to realize denitrification of the nitrogen-containing wastewater of a nitrogen fertilizer plant; the process is used for treating the high-concentration ammonia nitrogen and median-concentration nitrate nitrogen containing wastewater of the nitrogen fertilizer plant; strong acid cation exchange resin and weak alkali anion exchange resin are regenerated by adopting nitric acid and aqueous ammonia respectively; and the regenerated waste liquid ammonium nitrate is evaporated and concentrated to reclaim the ammonium nitrate. Compared with the traditional wastewater denitrification method, the process can remove ammonia nitrogen and nitrate nitrogen from the wastewater at the same time, reclaim the ammonium nitrate and recycle production water, does not produce secondary pollution, reclaims products from the pollutants, has obvious environmental benefit and economic benefit, and is a new path for treating the high-concentration ammonia nitrogen and median-concentration nitrate nitrogen containing wastewater of the nitrogen fertilizer plant.

The invention relates to a layered catalyst for selectively oxidizing 4-methylguaiacol-to-vanillin, and a preparation method thereof, and belongs to the technical field of catalysts. A coactive site is added to change the electronic structure of a main catalytic active site Co; and anions with different selective dear anion effect by inserting different hydrophilic and hydrophobic properties are inserted into an interlayer in order to influence the selectivity on products. One or more of magnesium, zinc, copper, aluminum, iron, nickel, manganese, titanium, samarium, calcium, cerium and chromium, gallium, indium, tin and other elements is/are added as a coactive component. The preparation method comprises the following steps: preparing a solution by using nitrates or chlorides of active components and the coactive component(s), adding a precipitating agent, carrying out a heating reaction, washing a solid substance, and drying; adding the prepared layered hydrotalciteinto a solution containing anions to be exchanged, and carrying out an ion exchange process to obtain the intercalated hydrotalcite catalyst. The prepared catalyst can be applied to the oxidation reaction of 4-methylguaiacol. The catalyst has high activity and has high selectivity to vanillin.

The present invention belongs to the field of chemical technology, and especially one kind of copper base catalyst with nanometer carbon material as co-catalyst for vapor reformation of methanol to prepare hydrogen and its preparation process. The catalyst is prepared through the process including the steps of: compounding 0.1 M solution of Cu/Zn/Al nitrate; compounding 0.1 M solution of sodium carbonate, dropping the 0.1 M solution of Cu/Zn/Al nitrate and 0.1 M solution of sodium carbonate in the same rate into reactor with nanometer carbon material for co-precipitation under strong stirring and 60 deg.c to obtain carbonate coprecipitate containing nanometer carbon material; washing, drying, roasting, etc. The prepared catalyst has unique porous structure of great specific surface area, high low temperature activity and high hydrogen selectivity, and may be used in preparing reformed product with hydrogen content up to 75 % and CO content lower than 0.1 %.

The invention discloses a leather waste water treatment system, which comprises a sludge thickener, a sludge dewaterer as well as a crude grating, a fine grating, a sand basin, an aeration equalizing tank, a coagulation sedimentation basin, an air floatation pool, a hydrolysis-acidification pool, a biological selection pool, an A/O nitrogen removing pool, a secondary sedimentation pool and a sand filtering pool which are connected by pipelines, sludge outlets of the sand basin, the coagulation sedimentation basin, the air floatation pool, the hydrolysis-acidification pool and the A/O nitrogen removing pool are connected by pipelines for connecting a sludge thickener; the invention also discloses a treatment process employing the leather waste water treatment system. The invention has the beneficial effects that ammonia nitrogen in the leather waste water converts into nitrate, thereby promoting utilization of nutrients in water by microorganism, and realizing high efficiency reduction of ammonia nitrogen and COD in leather waste water; the invention has the advantages of high waste water purifying capability, high efficiency and small land occupation area, and the waste water after treatment can reach the reuse water quality standard for reuse, thereby realizing the cyclic utilization of water after treatment and reducing waste of water resource.