170results about "Ammonia compounds" patented technology

The present application relates to waste gas treatment technical field, specifically for a kind of foul smell tail gas treatment device for disposal of sick and dead animals, including the spray tower being arranged on rack, filter mechanism for purifying spray water being arranged inside the spray tower and flushing mechanism for washing filler ball being arranged on the rack, the spray tower includes the tower shell assembly being arranged on the rack, spray assembly being arranged inside the tower shell assembly and filling assembly for dynamically distributing filler ball being arranged inside the tower shell assembly;The present application can dynamically layout filler ball, change the flow path of tail gas upwards, increase the residence time of tail gas, increase the reaction contact surface of filler ball and tail gas, ensure that tail gas can fully react with spray water, improve the purification efficiency of tail gas, solve the technical problem that hollow ball filler in the interior of traditional spray tower is static placed, leading to lower tail gas purification efficiency.

The present invention relates to an ammonia decomposition catalyst and a manufacturing method thereof, and more particularly to an ammonia decomposition catalyst containing alumina (Al2O3), cerium (Ce), lanthanum (La), ruthenium (Ru) and potassium (K).

The invention belongs to the technical field of chemical engineering and secondary resource utilization, and particularly discloses a collaborative utilization process of sodium sulfate and ammonium-containing waste salt. The high-value utilization method of sodium sulfate provided by the invention comprises the following steps: mixing sodium sulfate, organic ammonium salt and sulfuric acid, and adding water to prepare a mixed solution; extracting the mixed solution by using an extracting agent, and separating a water phase from an organic phase; adding a pH regulator into the water phase to regulate the pH to alkalescence, introducing carbon dioxide gas to fully react, cooling, crystallizing, and filtering to obtain filtrate and sodium bicarbonate precipitate; heating the filtrate for evaporative crystallization to obtain ammonium sulfate; and recovering the organic acid in the organic phase. The invention provides a subversive solution for sodium sulfate by-product accumulation and ammonium-containing wastewater treatment, has double values of resource circulation and carbon emission reduction, and has the advantages of full-flow closed-loop design, wide applicability, high product purity and high economical efficiency in process.

The application discloses a kind of water-soluble sulphur-based compound fertilizer preparation method, belong to compound fertilizer technical field.The steps include as follows:(1) in reaction kettle, concentrated sulfuric acid and potassium chloride are reacted under heating condition, reaction temperature is 105-115 DEG C, reaction time is 25-45 minutes, slurry is sent to cooling kettle;(2) in cooling kettle, temperature is reduced to 40-60 DEG C, slurry is sent to mixed acid tank;(3) in mixed acid tank, add dilute phosphoric acid, potassium bisulfate solution and slurry, reaction temperature is 65-75 DEG C, slurry is sent to tubular reactor;(4) in tubular reactor, add ammonia, washing liquid and slurry, reaction temperature is 150-180 DEG C, slurry is sent to granulator;(5) in granulator, add alkaline compound fertilizer raw material, return material and slurry for granulation, granulation temperature is 80-95 DEG C, return material ratio is 1:1.5-2.0;(6) the granules obtained from granulator are cooled and screened to obtain product.

The utility model discloses ammonia nitrogen removal equipment for anaerobic fermentation biogas slurry, and belongs to the field of ammonia nitrogen removal and recycling of anaerobic fermentation biogas slurry. All deaminated biogas slurry flows back to the anaerobic fermentation system by virtue of a steam stripping flash evaporation deamination technology, an ammonia absorption technology, an evaporative crystallization technology, a mud-mud heat exchange technology and the like. An adopted flash evaporation deamination tower (3) is internally divided into a plurality of areas, ammonia-containing biogas slurry sequentially flows through the areas and is in countercurrent contact with circulating steam and fresh steam in the areas, ammonia nitrogen in the biogas slurry is removed through steam stripping and flash evaporation, and the generated deaminated biogas slurry completely flows back to an anaerobic fermentation system; ammonia in the ammonia-containing steam is absorbed by dilute sulfuric acid in an ammonia gas absorption tower (9), an ammonium sulfate solution is generated and sent to an evaporative crystallization tank (16), indirect heating and circulating evaporative crystallization are adopted, and solid ammonium sulfate is transported outwards; the mud-mud heat exchanger (2) is suitable for heat exchange between non-Newtonian fluid materials. Biogas slurry is no longer discharged, and fixed asset investment of anaerobic fermentation projects with the same gas production scale is reduced.

Methods and systems for synthesis using an underwater electric arc. Such methods and systems form an electrical arc between an anode and a cathode positioned under water or within an aqueous mist and introduce an added material into the vicinity of the electrical arc. The formation of the electrical arc in the vicinity of the added material facilitates synthesis of chemical products from the added material. Such synthesized chemical products include ammonia, hydrogen, cyanide, and hydrogen cyanide.

A catalyst includes a catalyst particle including a first metal atom and an active site group attached to the first metal atom via one or more oxygen bridges. The active site group comprises a boric acid group, a metal hydroxide group or a metal oxide group. The metal hydroxide group includes a second metal atom or beryllium, and the metal oxide group includes a second metal atom. The second metal atom is different from the first metal atom and includes aluminum, gallium, indium, or bismuth.

The invention relates to the field of sewage treatment reagents, in particular to a composite alkaline carbon source for sewage treatment and a preparation method thereof.The preparation method comprises the following steps that S1, magnetic microwave pretreatment and magnetic powder recovery are conducted, and pretreated sludge is obtained; s2, performing alkaline fermentation to obtain a fermentation product; s3, carrying out solid-liquid separation and deep removal of nutritive salt to obtain a suspension; s4, refining the fermentation liquor to obtain an alkaline carbon source crude product; and S5, compounding and curing the carbon source to obtain the composite alkaline carbon source. The composite alkaline carbon source for sewage treatment is prepared, a traditional combination of sodium acetate and sodium carbonate is replaced, solid waste utilization is achieved, and the proportion of nitrogen, phosphorus and heavy metal elements is small.

This utility model relates to an anti-clogging reactor for the resource recovery and preparation of ammonium sulfate from high-concentration ammonia-containing waste gas. The reactor body includes an absorption zone and a crystallization zone from top to bottom, with the crystallization zone and the absorption zone connected. The absorption zone is located above the liquid surface, and the crystallization zone is located below the liquid surface. The top of the absorption zone has a tail gas outlet, and the bottom of the crystallization zone has a crystal slurry outlet. An external Venturi reaction zone is located below the absorption zone of the reactor body, connected to the reactor body. The Venturi reaction zone has an inlet for the ammonia-containing waste gas and an inlet for the circulating absorbent liquid. The external Venturi reaction zone forms a primary absorption, reducing the intensity of the absorption reaction within the reactor and significantly improving the anti-clogging capability.

A method comprising partially condensing and separating a feed stream comprising helium and hydrogen to produce a first medium-pressure vapor stream and a first medium-pressure liquid stream; reducing the pressure of the first medium-pressure liquid stream or a stream derived from the first medium-pressure liquid stream to produce a low-pressure vapor stream and a low-pressure liquid stream; cooling the first medium-pressure vapor stream by indirect heat exchange against the low-pressure liquid stream to produce a first partially condensed medium-pressure stream; and separating the first partially condensed medium-pressure stream to produce a second medium-pressure vapor stream and a second medium-pressure liquid stream.

Methods and systems for synthesis using an underwater electric arc. Such methods and systems form an electrical arc between an anode and a cathode positioned under water or within an aqueous mist and introduce an added material into the vicinity of the electrical arc. The formation of the electrical arc in the vicinity of the added material facilitates synthesis of chemical products from the added material. Such synthesized chemical products include ammonia, hydrogen, cyanide, and hydrogen cyanide.

The invention relates to the technical field of hydrocyanic acid production, in particular to a high-yield hydrocyanic acid chemical process which comprises the following steps: 1) respectively pretreating ammonia gas, natural gas and air, mixing according to a ratio, and inputting into a hydrocyanic acid reactor; (2) carrying out oxidation reaction on the raw material gas under a certain condition under the catalytic action of a platinum alloy net to prepare ammonia-containing hydrocyanic acid gas; 3) performing ammonia removal treatment on the hydrocyanic acid gas to obtain purified hydrocyanic acid gas and an ammonium sulfate solution containing cyanide; 4) carrying out cyanogen removal treatment on the ammonium sulfate solution to obtain mixed gas containing hydrocyanic acid and a cyanogen-free ammonium sulfate solution; according to the method, the area of a platinum alloy net capable of being contained is increased, the reaction area playing a catalytic role is increased, then the reaction efficiency is improved, and the single-line productivity is improved.

A phase-stabilized ammonium nitrate (PSAN) explosive is provided, comprising PSAN prills and a fuel. The PSAN prills contain ammonium nitrate, a potassium salt, and an inorganic porosity enhancer.

The application belongs to the technical field of chemical materials, and specifically discloses a method for preparing lithium sulfide, which comprises the following steps: mixing and reacting lithium salt and ammonium sulfide to obtain lithium sulfide; wherein the lithium salt comprises at least one of lithium hexafluorophosphate, lithium difluorophosphate and lithium tetrafluoroborate. In the method for preparing lithium sulfide, the lithium salt and the ammonium sulfide can be fully reacted under mild conditions, the reaction time is short, the reaction yield is high, and the obtained lithium sulfide has high purity.

An active catalyst for ammonia synthesis is provided that is integrated in a composition or complex with a dedicated sorbent such that the catalyst portion and sorbent portion are in direct intimate contact, which overcomes the thermodynamic limits for conversion. The sorbent may include a metal halide absorbent, zeolite absorbent, other material absorbent or absorbent to capture ammonia in close molecular contact or near molecular contact with the catalyst in the production of ammonia, where the composition / complex may be provided in the form of a granular or pill structure. By removing the ammonia substantially while forming the ammonia, the forward reaction for producing the ammonia can continue with little attenuation, such that high net conversion is achieved in a single pass or accumulation within the segmented reactor while operating in series.

The invention relates to a comprehensive recovery method of acid waste liquid in a process of producing graphene oxide by a chemical method. The method comprises the following steps: filtering the acid waste liquid to remove impurities; the method comprises the following steps: introducing ammonia gas into the acidic waste liquid, controlling the adding amount of the ammonia gas, enabling the reaction temperature to be within a proper range by virtue of reaction heat generated in a reaction process, and enabling a reaction system to be still acidic, so that part of SO4 < 2-> ions in the acidic waste liquid react with NH3 to generate (NH4) 2SO4, and the residual SO4 < 2-> is combined with Mn < 2 + > ions to form a MnSO4 supersaturated solution which is completely separated out in a salt form; filtering while the solution is hot to obtain a MnSO4 crystal substance and a potassium ammonium sulfate solution; introducing ammonia gas into the ammonium potassium sulfate solution to obtain a mixed solution; and carrying out reduced pressure distillation on the mixed solution to obtain a solid which is the ammonium potassium sulfate compound. The method has the beneficial effects that the resource utilization benefit of each element in the acid waste liquid is maximized, and the production cost of ammonium sulfate potassium compound fertilizer and graphene oxide is reduced.

The application discloses a method for preparing liquid HCN by an ammonia oxidation method and a reaction gas absorption system, and the preparation process is as follows: reaction gas is introduced into an absorption device to realize total absorption of HCN, NH3 and H2O, then the absorption rich solution is sent into a rectification device to realize resolution and rectification, liquid HCN and absorption lean solution are obtained, the liquid HCN is recovered, and part of the absorption lean solution is returned and mixed with sulfuric acid to form a sulfuric acid-containing solution. Compared with the existing process, the process method of the application realizes total absorption in one step, then liquid HCN is obtained by rectification, the process flow is short, the equipment is less, the investment is lower, the operation is more stable and safe, and the total energy consumption is lower.

A catalytic reactor comprising include a housing coupled with a feedstock source to receive a flow of ammonia in gaseous form that can flow through the catalytic reactor. The housing further comprises

Provided are an ammonium nitrate manufacturing apparatus, which is an apparatus for manufacturing ammonium nitrate from a diluted nitrogen oxide, including: a cathode; an anode which is arranged to be opposite to and spaced apart from the cathode; and an electrolyte placed between the anode and cathode, wherein the cathode and the anode are independently of each other gas diffusion electrodes including: a porous substrate; metal organic frameworks (MOFs) dispersed in the porous substrate; and a metal catalyst placed on one surface of the porous substrate, and a method for manufacturing ammonium nitrate using the same.

The invention discloses an ammonium sulfate product and a preparation method thereof. The preparation method of the ammonium sulfate product comprises the following steps: S1, reacting ammonia water with acetylene purification waste sulfuric acid oxidized by hydrogen peroxide to obtain an ammonium sulfate solution; the end point pH of the reaction is 0.5-3; and S2, performing impurity removal and crystallization on the ammonium sulfate solution to obtain the ammonium sulfate product. The method has the characteristics of simple operation and low cost; and the prepared ammonium sulfate product is high in quality.

A system and method for ammonia production is disclosed. A system may generate a synthesis gas from a hydrocarbon and subsequently produce ammonia from the synthesis gas. The system includes a recuper

The invention discloses a method for separating calcium, silicon, iron and aluminum and enriching titanium by combining titanium white waste acid and red mud, which comprises the following steps: adding antimony powder into concentrated sulfuric acid, heating, dissolving, cooling, adding a sodium dihydrogen phosphate dihydrate liquid (the liquid is formed by heating solid sodium dihydrogen phosphate dihydrate to 60 DEG C higher than the melting point of the sodium dihydrogen phosphate dihydrate), stirring, filtering, washing and drying to obtain the product. Antimony phosphate powder is obtained. The synthesis method is easy to operate, low in requirement on synthesis equipment, free of high-temperature reaction, short in time consumption, high in efficiency and high in product purity.

Methods and systems for operating a gas compressor in an ammonia and urea plant facility. The present disclosure provides a plant facility comprising an ammonia production plant and a urea production plant. The urea production plant comprises a gas compressor, a steam turbine, and an electric motor, the steam turbine being fluidly connected to the ammonia production plant for receiving steam generated by the ammonia production plant and to the gas compressor for providing power to the gas compressor, wherein the electric motor is connected to the gas compressor and configured to provide power to the gas compressor. The present disclosure also provides a method of operating an ammonia and urea plant facility, and a method of revamping an ammonia and urea plant facility.

The present invention provides a method for removing hydrogen sulfide (H2S) and hydrogen cyanide (HCN) from concentrated ammonia water, the method comprising: a catalyst treatment step of contacting concentrated ammonia water containing hydrogen sulfide (H2S) and hydrogen cyanide (HCN) with an iron oxide catalyst; and a regeneration step of supplying a regeneration solution to the iron oxide catalyst to regenerate the iron oxide catalyst. According to the present invention, by simultaneously removing hydrogen sulfide (H2S) and hydrogen cyanide (HCN) contained in concentrated ammonia water, it is possible to improve the absorption efficiency of hydrogen sulfide (H2S) and hydrogen cyanide (HCN) of coke oven gas (COG) when using concentrated ammonia water in an H2S scrubber (H2S / S).

A system for capturing volatile fluids and agglomerations discharged from chemical and refrigerant systems during an overpressure situation includes an energy dissipation assembly that uses impact bars (116) and irregular surfaces to decrease the energy of such discharges by breaking up the agglomerations, and one or more tanks (154, 178) for capturing constituents for reuse, safe venting to atmosphere, or disposal.

The invention discloses a method for producing a high-phosphorus-content calcium magnesium phosphate fertilizer by using an industrial byproduct magnesium ammonium phosphate, which comprises the following steps: drying and screening magnesium ammonium phosphate, adding phosphorite, dolomite or serpentine and coke or anthracite, feeding the materials into a smelting furnace according to a ratio, melting and smelting at a high temperature, blowing air or oxygen by an air blower at the smelting temperature of 1400-1600 DEG C for 2-3 hours, and cooling to room temperature to obtain the high-phosphorus-content calcium magnesium phosphate fertilizer. The smelting time is 0.5-4 hours, discharging molten slag from a slag opening of the smelting furnace, and carrying out water quenching to obtain the calcium magnesium phosphate fertilizer; gas generated in the process enters a hot-blast stove along with smelting furnace gas, at the moment, the temperature of a hearth of the hot-blast stove reaches 900-1000 DEG C due to gas combustion, and ammonia reacts with nitrogen oxide in the tail gas to obtain nitrogen and water, and reacts with sulfur dioxide to finally obtain ammonium bisulfate. According to the invention, resource utilization of the industrial byproduct magnesium ammonium phosphate can be realized, the calcium magnesium phosphate fertilizer with high phosphorus content can be obtained, and nitrogen oxides and sulfur dioxide in the tail gas in the production process of the calcium magnesium phosphate fertilizer can be more effectively removed.

The invention belongs to the technical field of titanium dioxide production waste resource utilization, and particularly relates to a method for synergistically preparing ammonium sulfate and white carbon black from sulfuric acid method titanium dioxide waste acid. According to the method, iron is pre-removed through precision filtration and low-temperature crystallization, most impurities and ferrous sulfate in the waste acid are removed, then the waste acid serves as a cheap acid source, white carbon black and ammonium sulfate are prepared, all-component utilization of the waste acid is achieved, sulfuric acid in the waste acid is used for preparing white carbon black and ammonium sulfate, iron ions are recycled into ferrous sulfate heptahydrate, the resource utilization rate is larger than or equal to 98%, and the cost is low. And the problem of waste acid discharge is thoroughly solved, and the fundamental transformation from tail end treatment to source recycling is realized. Moreover, the steps of pre-treatment and iron pre-removal ensure high whiteness and low impurity content of the white carbon black, and meet high-end application requirements. Meanwhile, the purity and color of the ammonium sulfate product are also ensured. And 800-1000 yuan benefits can be additionally created for each ton of waste acid, so that direct and considerable benefits are brought to titanium dioxide production enterprises.

A compressor train of chemical plants includes: a compression unit which is driven to compress a process gas of the chemical plants; a steam turbine which is rotated by steam generated in accordance with the processing of the process gas of the chemical plants to drive the compression unit; a motor which is able to assist the rotation of the steam turbine; and a frequency conversion unit which is connected to an electric power system and controls the rotation of the motor.

Apparatuses, systems, and methods for leveraging subsurface geochemical reactions to provide optimal conditions for chemical extraction, hydrogen gas and / or ammonia formation and collection, carbon dioxide mineralization, and mining. In some embodiments, an integrated system can be used to simultaneously 1) produce hydrogen (H2) and ammonia (NH3) in-situ by injecting H2O and nitrogen (N)-sources onto ultramafic rocks; 2) mineralization of carbon dioxide (CO2) by injecting CO2 gas onto ultramafic rocks; and 3) collection and separation of percolated fluid form water- ultramafic rocks to extract valuable trace elements therefrom. The integrated system can deliver reactants through a subsurface for reaction with rocks disposed below ground, and outlets for collecting the products from the earth.