1026results about "Ammonium sulfates" patented technology

A system involving a two-step gasification of a carbonaceous source to produce bulk hydrogen that avoids the early formation of CO₂ and obviates the traditional water gas shift (WGSR) step, carbochlorination of a metallic ore the production of metals found in the ore that utilizes carbon monoxide as an oxygen sink, rather than the traditional coke, and carbon oxides management that eliminates major impediments to emission-neutral power generation and the reduction of major metals. The gasification uses a rotary kiln reactor and gas-gas cyclonic separation process to separate synthesis gas into purified hydrogen and purified carbon monoxide. Purified bulk carbon monoxide issued in metallurgical reduction, and purified bulk hydrogen as fuel for an emission-neutral hydrogen combined cycle (HCC) turbine power generation station. The carbochlorination is integrated with: a) the concurrent separation and purification of all metal-chlorides (metchlors) and capture of CO₂ for passage to the carbon oxides management system; b) the direct reduction of metchlors to nanoscale metallurgical powders and/or to dendritically-shaped particles, including metchlor reduction for the ultrahigh-performance semiconductor metals of the III-V group; and, c) the reforming of metal-oxides with improved crystalline structure from metchlors. The carbon oxides management collects, stores and directs to points of usage, carbon oxides that arise in various processes of the integrated system, and captures carbon monoxide for process enhancement and economic uses and captures carbon dioxide as a process intermediate and for economic uses.

The recovering process includes the steps of: the reaction of the S containing fume with water solution of ammonia, with ammonia-to-sulphur molar ratio of 1.3-1.8 and gas-to-liquid ratio of 2000-5000, to produce ammonium sulfite solution; the oxidation of ammonium sulfite solution with air to obtain ammonium sulfate solution; the contact of the ammonium sulfate solution with hot fume to evaporatewater and the crystallization of ammonium sulfate in a crystallizer to produce commercial ammonium sulfate fertilizer. The equipment includes one desulfurizing tower with SO2 absorbing section, one ammonium sulfite oxidizing section, ammonium sulfate solution concentration section, one water washing section and mist elimianting section. The present invention can lower cost and steam consumption, reduce fume density and produce ammonium sulfate fertilizer.

The invention relates to an ammonia process flue gas treatment method for acidic tail gas. The method includes the steps of: 1) controlling the sulfur dioxide concentration of tail gas entering an absorption tower at a level of less than or equal to 30000mg/Nm<3>; 2) arranging process water in an absorption tower entrance flue or in the absorption tower or cooperating with a ammonium sulphate solution to perform spray cooling; 3) disposing an oxidation section in the absorption tower, setting an oxidation distributor at the oxidation section to achieve oxidation of a desulfurized absorption liquid; 4) arranging an absorption section in the absorption tower, utilizing an absorption liquid distributor in the absorption section to realize desulfurization spray absorption by an ammonia-containing absorption liquid, which is fed through an ammonia storage groove; 5) arranging a water washing layer at an absorption section upper part in the absorption tower, washing the absorption liquid in the tail gas by the water washing layer and reducing the absorption liquid escape; and 6) setting a demister at the upper part of the water washing layer in the absorption tower to control the mist drop content in the purified tail gas. Employment of the Claus sulfur recovery and ammonia process desulfurization integrated desulfurization technology in the coal chemical industry can reduce the investment cost of after-treatment, the process can be simpler, and factory environmental protection treatment can form an intensive advantage.

The invention provides a cleaning treatment method of dying industrial acidic wastewater. After purified by measurements of neutralization, decolouring, oxidation, condensation, separation and the like, wastewater is reused as synthetic bottom water and dye filter cake washing water for dye production, thus avoiding discharge of a lot of colored wastewater with high COD value during a traditional dye production process. By a method of using a by-product ammonium sulfate or ammonium chloride, generation of calcium sulfate is avoided during neutralization of wastewater by the use of lime. Therefore, the dangerous solid waste calcium sulfate slug treatment problem is solved, and the cleaning production purposes of water saving, emission reduction and synergy are reflected.

An integrated ammonia-process desulfurization method of various acidic gases in an oil refining device includes the following steps: (1) preparing heavy oil, light oil, acidic liquid and solvents through an atmospheric and vacuum distillation unit from crude oil, and feeding the heavy oil into a catalytic cracking device, the light oil into a hydrogenation device, and the acidic liquid and the solvents into a sulfur recovery combined device; (2) mixing a part of FCC oil, which is produced through the catalytic cracking device, with the light oil and feeding the mixed oil into the hydrogenation device to produce hydrogenated oil, the acidic liquid and solvents, wherein a part of the hydrogenated oil is fed into an adsorption device while the other part of the hydrogenated oil is stored and marketed as product oil; (3) feeding the acidic liquid and solvents and the acidic liquid and solvents prepared from the atmospheric and vacuum distillation unit into the sulfur recovery combined device to produce sulfur, and feeding the tail gas into an incineration unit for incineration to obtain incinerated flue gas; (4) feeding a part of the FCC oil which is produced in the catalytic cracking device into the adsorption device, performing adsorption desulfurization, and feeding an adsorption catalyst into a regenerative device to regenerate the adsorption catalyst in an oxidizing manner to obtain regenerated flue gas; and (5) feeding the FCC flue gas, the incinerated flue gas and the regenerated flue gas into an ammonia absorption device to perform absorption desulfurization and discharging cleaned flue gas after the flue gas meets standard.

The invention relates to a method for preparing aluminum oxide and other products by aluminum-containing materials of bauxite, alunite, nepheline, fly ash, kaolin, coal gangue and clay. The method comprises the following steps: (1) crushing and grinding an aluminum-containing material, carrying out mixing and baking for the treated aluminum-containing material and ammonium bisulfate; (2) carryingout dissolution and filtering for the baked clinker to obtain a crude ammonium aluminum sulfate solution and aluminum extracting residue; (3) carrying out an iron precipitating treatment for the ammonium aluminum sulfate solution with the concentration more than 1 g/L by adopting a jarosite method, then carrying out an iron precipitating treatment by a goethite method, carrying out an aluminum precipitating treatment for the resulting solution, carrying out calcination for the resulting aluminium hydroxide to prepare aluminum oxide; (4) carrying out an iron precipitating treatment for the ammonium aluminum sulfate solution with the concentration less than 1 g/L by adopting the goethite method, and carrying out an aluminum precipitating treatment to prepare aluminum oxide, or adopting a recrystallization method to carry out purification, adopting a reaction of the ammonium aluminum sulfate crystal and a ammonium carbonate solution to precipitate the aluminum to obtain ammonium aluminumcarbonate, carrying out calcination for the ammonium aluminum carbonate, and adopting a Bayer method to treat the calcined ammonium aluminum carbonate to prepare sandy aluminum oxide; (5) washing anddrying the aluminum extracting residue, wherein the dried aluminum extracting residue is adopted as the silicon dioxide product.

The present invention discloses a diesel oxidation ammonia desulfurization method (DOA), comprising steps of:1) oxidation reaction. In the presence of a catalyst, using an oxidant and selectively oxidizing sulfur-containing compounds of diesel to obtain a finished diesel with the sulfur dioxide reaction exhaust and sulfur content amount is not more than 10ppm; 2) ammonia desulfurization. Using an ammonia desulfurization method to process the sulfur dioxide reaction exhaust, converting the sulfur dioxide into an ammonia sulfate fertilizer and emitting clean gas under required standards; and in the presence of the catalyst, using the oxidant and selectively oxidizing sulfur-containing compounds of diesel (mainly mercaptans, sulphides, and thiophenes sulfur-containing compounds). The method is simple in process with no secondary pollution and can be widely used in petroleum refining industry.

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 provides a method for desulfurization of a sulfur recovery tail gas by using a boiler flue gas ammonia method. The method comprises the following steps: (1) burning the sulfur recovery tail gas, wherein sulfide in the sulfur recovery tail gas is converted into sulfur dioxide; (2) converging the burnt sulfur recovery tail gas with the boiler flue gas to form merged flue gas, feeding the merged flue gas to an absorption tower, and discharging the merged flue gas after being absorbed by absorption liquid in a countercurrent manner in the absorption tower, wherein the absorption liquid is a water solution containing an ammonium salt, and the ammonium salt is a mixture of ammonium sulfate and ammonium sulfite. By adopting the method disclosed by the invention, not only can the sulfur recovery rate be better ensured, but also emission of the tail gas achieves the environmental protection requirements; meanwhile, investment and operative difficulty are reduced; the floor area is reduced; the comprehensive utilization efficiency of energy is improved; a good effect of treatment of waste by waste can also be achieved.

The invention belongs to the ferment industry, in particular relates to a treatment method of ion exchange waste liquor in lysine production by a fermentation method. The invention adopts a common electrodialysis technology to recycle ammonium sulfate, ammonium chloride or ammonium nitrate in the lysine ion exchange waste liquor produced by extracting the lysine from lysine fermentation production to water solution of ammonium sulfate, ammonium chloride or ammonium nitrate, or adopts a bipolar membrane electrodialysis technology to regenerate sulfuric acid, hydrochloric acid or nitric acid and NH3 by ammonium sulfate, ammonium chloride or ammonium nitrate in the lysine ion exchange waste liquor produced by extracting the lysine from the lysine fermentation production, or adopts the combination of the common electrodialysis technology and the bipolar membrane electrodialysis technology to recycle ammonium sulfate, ammonium chloride or ammonium nitrate in the lysine ion exchange waste liquor produced by extracting the lysine from the lysine fermentation production and regenerate sulfuric acid, hydrochloric acid or nitric acid and NH3. The invention realizes the resource recycling of the ion exchange waste liquor and clean production.

Regarding the scavenger for aldehyde(s) used at the time of manufacturing a woody panel using woody materials and formaldehyde-based binders, the scavenger for aldehyde(s) without lowering of trapping properly even when a surface of said woody panel is sanded and having an excellent trapping property of trapping formaldehyde is provided. Further, the method of manufacturing a woody panel using a scavenger for aldehyde(s) and a woody panel are provided.

At least one kind of compound for trapping aldehyde(s) being solid at a room temperature is included and said compound for trapping aldehyde(s) is defined to be a powdery scavenger for aldehyde(s) having a property of generating acidic gas, in particular, sulfurous acid gas by heating and said compound for trapping aldehyde(s) is added to a binder or woody materials followed by a hot press, thereby manufacturing a woody panel.

The invention discloses a synchronous denitration process based on wet ammonia process flue gas desulfurization. The problems such as high operating cost and equipment investment cost, complex process and high energy consumption existing in an existing process are solved. According to the technical scheme, the process comprises the following steps: pressurizing flue gas, feeding the flue gas into a concentrating tower, allowing the flue gas to contact and react with a concentrated solution in the tower, feeding the flue gas out of the concentrating tower into an absorption tower to contact and react with absorption liquid in the tower, feeding a small amount of reacted concentrated solution at the bottom of the concentrating tower into an ammonium sulfate crystallization system, and adding a complexing agent EDTA-Fe (II) or adding EDTA-Na salt and ferrous sulfate according to a molar ratio of 1:1 into the absorption liquid in the absorption tower, so that the concentration of the EDTA-Fe (II &III) in the absorption liquid is 0.015-0.05mol/L; and feeding a small amount of absorption liquid in the absorption tower into the concentrating tower to be mixed with the concentrated solution. The synchronous denitration process disclosed by the invention has the advantages of simplicity, low operating cost and equipment investment, capacity of performing high-efficiency synchronous desulfurization and denitration and low energy consumption.

The invention relates to an electrolytic manganese slag processing method, in particular to an electrolytic manganese slag comprehensive utilization process. The method recovers the recyclable materials in electrolytic manganese slag through repeated water washing and filtering. The method can solve the air pollution source, particularly eliminate the water pollution source, and protect people health from being damaged. The method can extract higher-value chemical products through the scientific flow, and make the residuary filter residue into building products, thereby effectively utilizing the resource. Zero discharge is realized during the overall process of the technical proposal of the method, and because no additional chemical substances are added, additional environmental pollution can not be caused.

A process is provided for the removal of hydrogen sulfide out of a gaseous stream (22), such as a natural gas, by contacting the hydrogen sulfide containing gas with a sorbing liquid (26) containing a tertiary amine so that the hydrogen sulfide is sorbed into the liquid in absorber (11) and transferring the sorbing liquid/hydrogen sulfide mixture to a reactor (15) where the tertiary amine promotes the conversion of the hydrogen sulfide into polysulfide via reaction with sulfur; transferring the polysulfide solution from the reactor (15) to a regenerator (10) where polysulfide is converted into elemental sulfur via reaction with air (9); transferring at least a portion of the solution (25) containing elemental sulfur, as well as sulfate and thiosulfate species, into a mixture (36) where it is contacted with gaseous ammonia which reacts with the sulfate and thiosulfate species to produce ammonium sulfate and ammonium thiosulfate which are removed from the solution while the remaining portion of solution (25) is transferred to a sulfur recovery unit (14). That portion of the solution which has been subjected to ammonium sulfate and ammonium thiosulfate removal is rejoined with that portion of the solution (25) being forwarded to sulfur recovery unit (14). The solution from the sulfur recovery unit (14) is recycled back to the absorber (11).

A method for sorption extraction of succinic acid in fermentation broth by an anion resin belongs to the biochemical technical field. The method comprises the following steps that succinic acid fermentation broth undergoes decoloring treatment by heated active carbon; fungus residue is eliminated through centrifugal filtration or microfiltration membrane filtration; the obtained fermentation clear solution is adsorbed by an alkaline anion resin column, and impurity is flushed away by water after adsorption saturation and then is eluted by hydrochloric acid solution or sulfuric acid solution, thereby obtaining succinic acid solution; the succinic acid solution undergoes depressurized concentration and crystallization so as to obtain a succinic acid product; moreover, MgCl2 and residual sugar in effluent after anion resin column adsorption of the fermentation broth is reclaimed; the MgCl2 in the effluent generated during anion resin adsorption is passed through CO2 or (Na)2CO3 so as to prepare magnesium carbonate which is reclaimed and used in buffering and adjusting pH during fermentation; and sugar in filtrate is reclaimed and used in fermentation ingredients for further fermentation. The method can realize recovery and reuse of materials during operation, and substantially reduces material consumption during extraction; moreover, the method reduces the treatment cost of waste water for environmental protection, and increases the economic benefit of products.

The invention discloses an acidolysis method of magnesium-containing phosphate rock. The method provided by the invention is characterized by comprising the following steps of: carrying out acidolysis on the magnesium-containing phosphate rock to obtain a water-soluble calcium, magnesium and phosphoric acid containing acidolysis solution, carrying out acidolysis on the phosphate rock by using the generated phosphoric acid to generate Ca(H2PO4)2.H2O solid, performing a reaction between H2SO4 and water-soluble calcium to generate high-pureness calcium sulfate whisker, and performing a reaction between water-soluble magnesium and phosphor in the acidolysis solution and NH3 to generate character separation magnesium ions of a MgNH4PO4 solid so as to realize complete high-efficiency comprehensive utilization of the acidolyzed magnesium-containing phosphate rock. The focus of the invention is to change magnesium ions into controllable parameters which are beneficial to circulation of the acidolysis solution. The magnesium-containing phosphate rock can be efficiently utilized, and also the compound magnesium ammonium phosphate can be used to realize the separation of phosphor magnesium from a circulation medium HCl or HNO3 or CaCL, Ca(NO3)2, thus realizing the combination and combined production with a present ammonium phosphate and phosphor product processing technology. The method provided by the invention has advantages of concise technology, less investment, low energy consumption, low cost, high benefit and no discharge of ''three wastes (waste gas, wastewater and industrial residue)'', and fully presents great business value and great resource value of the high magnesium-containing phosphate rock.

The invention provides a thermal circulation technology of utilizing sodium sulfate solution or a carrier to cogenerate sodium carbonate and ammonium sulfate. The thermal circulation technology comprises the following steps: regarding an ammonium hydrogen carbonate solution prepared from sodium sulfate, ammonia and carbon dioxide as a raw material to be conducted with a replacement reaction, then carrying out separation to obtain sodium hydrogen carbonate (which can be calcined to obtain a pure alkali product) and an alkali preparing mother solution containing ammonium sulfate, sodium sulfate, ammonium hydrogen carbonate and ammonium carbonate; preheating the alkali preparing mother solution to a high temperature to remove ammonium hydrogen carbonate and ammonium carbonate, and then obtaining the deaminized mother solution containing ammonium sulfate and sodium sulfate; evaporating the deaminized mother solution at a high temperature to obtain sodium sulfate and a niter preparing mother solution; evaporating the niter preparing mother solution at a low temperature to obtain ammonium sulfate and an ammonium preparing mother solution; circulating the sodium sulfate to the replacement reaction working procedure; circulating the ammonium preparing mother solution to the deaminized mother solution high-temperature evaporation working procedure. The main products and byproducts prepared by thermal circulation technology disclosed by the invention are high in quality and added value; the thermal circulation technology is well-adapted in raw materials, low in sodium sulfate theoretical use ratio, production cost and energy consumption, closed circulating, free of three-waste discharge, and capable of saving energy and reducing emission.

The invention provides a method for recycling ammonium salt from chemical waste liquor generated in the desulfurization/decyanation process of coke oven gas, and particularly, the invention provides a method for extracting high-purity ammonium thiocyanate and ammonium sulphate from coking desulfurization/decyanation waste liquor. The purities of ammonium thiocyanate and ammonium sulphate produced by using the method disclosed by the invention are greatly improved in comparison with those of products produced by contrasted embodiments. According to the method disclosed by the invention, high-purity products can be prepared under the condition of only carrying out one-time step-by-step concentration, so that the wastewater discharge amount is reduced and the environment pollution of coking plants is alleviated; and high-purity and high-added-value chemical raw materials are recycled, thereby increasing the economic benefits of enterprises.