28results about "Ammonium salt preparation" patented technology

The utility model relates to an energy-saving device for recovering high-purity ammonia from wastewater, and belongs to wastewater treatment in the field of environmental protection. Comprising a deamination tower, a preheater, a wastewater cooler, a heat compensation heat exchanger, a compressor and a throttle valve, the deamination tower comprises a heating section, a deamination section, a condensation section, an ammonia washing section and a purification section; the ammonia washing section is provided with a pure water inlet and an ammonia water outlet, and the purification section is provided with a dilute acid aqueous solution inlet and a salt solution outlet. Low-grade waste heat is converted into a high-grade heat source through the compressor, fresh steam is replaced, and the purpose of saving energy is achieved. The problem that tail gas emission needs retreatment in the prior art is solved, zero emission of tail gas is achieved, and meanwhile co-production of ammonia water and ammonium salt is achieved.

The utility model relates to the field of wastewater treatment devices, in particular to an ionic rare earth high-chlorine ammonia-nitrogen wastewater treatment and resource recycling system. The system comprises a chlorine salt reaction device (1), a deamination system (2), a solid-liquid separation system (3), an evaporation system (4) and a drying system (5), the chlorine salt reaction device (1) is a chlorine salt reactor; a deamination system (2), a solid-liquid separation system (3), an evaporation system (4) and a drying system (5) are sequentially connected behind the chlorine salt reactor; and the chlorine salt reaction device (1) is respectively connected with a high-chlorine ammonia-nitrogen wastewater conveying pipeline (6) and a slaked lime adding device (7). According to the utility model, two inorganic products, namely an ammonium product and calcium chloride, are obtained, so that not only is the wastewater treated, but also good economic benefits are achieved.

An apparatus and method for producing ammonium bicarbonate in an ammonia-based decarbonation system is provided. The apparatus includes a cooling functional zone operable to cool a process gas, an ammonium bicarbonate production zone operable to produce ammonium bicarbonate, a carbon dioxide absorption zone operable to absorb carbon dioxide from the process gas via multi-stage absorption, and an ammonia removal functional zone operable to remove ammonia from the decarbonated process gas, in which absorbent ammonia for carbon dioxide removal is mainly added to the carbon dioxide absorption zone. Through the zone control of ammonium bicarbonate production, CO2 absorption and ammonia removal, the efficiency of decarbonation absorption can be improved and ammonia leakage can be reduced. Meanwhile, the carbon dioxide in the flue gas can be utilized for the production of ammonium bicarbonate as a nitrogen fertilizer.

A method of forming an ammonia product and / or ammonium product includes - Feeding a feed stream containing ammonia to a stripper (2) at temperatures below the boiling point of water, - Introducing a stripper gas into the stripper at a stripper gas inlet (16), contacting the feed stream with the stripper gas, and removing the stripper gas at a stripper outlet (17), - Forming a condensate from the stripper gas in a condenser (20), - Feeding the condensate to a process unit (25), - Forming an ammonia and / or ammonium product in the process unit (25), and - Feeding an outlet (34,48) of the process unit (25) to the stripper gas inlet (16) of the stripper (2). Also a system (1) for removing ammonia from an ammonia containing effluent is described.

The present invention relates to a process for the production of ammoniacal nitrogen, which comprises carrying out dinitrogen reduction in the presence of a compound of formula (I) containing at least one element of group 13 of the periodic table and a reducing agent, and to the use of a compound of formula (I) for the dinitrogen reduction.

The utility model relates to the technical field of coal chemical industry, in particular to a device for removing ammonia in raw gas in the process of producing hydrogen from coal. The ammonia washing tower comprises an ammonia washing tower body, a water inlet and a water outlet are fixedly connected to the top and the bottom of the ammonia washing tower body respectively, round pipes are fixedly connected into the water inlet and the water outlet, a cavity is formed in a shell of each round pipe, a resistance wire is fixedly connected to the rear end of each cavity, and a power source is fixedly connected to the other end of each resistance wire. A sensing rod is fixedly connected to the front end of the power source, a sliding pipe is slidably connected to the front end of the cavity, the structure of the sliding pipe is the same as that of the round pipe, internal element connection is also the same as that of the round pipe, and a filter screen is fixedly connected to the front end of the sliding pipe. The device for decomposing the ammonium salt crystals is additionally arranged at the water inlet, so that the treatment of the ammonium salt crystals at the water inlet is realized.

The invention discloses a cobalt carbonate wastewater recycling application method, belongs to the field of industrial wastewater treatment, and solves the problems of low ammonium chloride yield and high reagent consumption in the existing method. The method comprises the following steps: carrying out decarburization treatment, wherein the decarburization pH value is 6.01-6.05; carrying out two-stage de-weighting; the water subjected to weight removal enters an MVR evaporation system to be evaporated, and the water enters a falling film evaporator after being heated by a plate heat exchanger; the slurry enters a forced evaporator to be further evaporated and concentrated; the slurry enters a thickener and is circularly separated in the thickener, concentrated liquid enters a centrifugal separation procedure, hot steam is conveyed into a discharging conveying belt and a discharging pipeline in the salt discharging process of a centrifugal machine, drying is carried out while salt discharging is carried out, and ammonium chloride is obtained. According to the invention, the working procedures are improved, so that the operation process is greatly shortened, the energy-saving effect is obvious, the yield of ammonium chloride is increased by 15-20%, the consumption of hydrochloric acid is reduced by 30%, and the consumption of ammonia water is reduced by 10-15%.

This invention discloses a Co 0.2 Cd 0.8 This paper describes the preparation method of S / CaTiO3 / NiSx materials and their application in photocatalytic nitrogen fixation, belonging to the field of photocatalytic materials technology. Firstly, an S-type heterostructure Co was prepared using an ultrasonic method. 0.2 Cd 0.8 S / CaTiO3 composite, then using ultrasound to bond metalloid NiS x Nanoparticle co-catalysts and Co 0.2 Cd 0.8 S / CaTiO3 complex forms Co 0.2 Cd 0.8 S / CaTiO3 / NiS x Ternary composite photocatalyst. The semiconductor Co in this invention... 0.2 Cd 0.8 S and semiconductor CaTiO3 first form an S-type heterostructure, which not only accelerates the directional movement and separation of photogenerated electrons and holes, but also maintains the strong redox capability of photogenerated charge carriers; in addition, NiS is loaded onto the S-type heterostructure. x co-catalyst, NiS x Nanoparticle co-catalysts, acting as electron-capturing centers, can not only provide more reactive sites but also further improve charge separation efficiency.

A system for removing ammonia from an ammonia-containing liquid, comprising a heat exchanger, an ammonia stripper and an acid scrubber, wherein the ammonia stripper comprises at least two stripper units, which are in fluid communication with one another through a series connection, forming a fluid flow path from the ammonia-containing liquid inlet through the at least two stripper units to the liquid discharge outlet, and wherein the acid scrubber comprising at least two scrubber units, which are in gas communication with one another and the at least two stripper units through a series connection, forming a gas flow path from the air inlet through the at least two stripper units and scrubber units to the scrubber air outlet which is opposite to the fluid flow path through the striper units.

This invention provides an integrated process for processing ammonium fluorosulfate, a by-product generated in the production of bis(fluorosulfonyl)imides. [Solution] A process for processing ammonium fluorosulfate byproducts includes providing an ammonium fluorosulfate byproduct mainly comprising ammonium fluorosulfate and smaller amounts of fluorosulfonic acid and bis(fluorosulfonyl)imide; mixing the ammonium fluorosulfate byproduct with water; reacting the mixture of ammonium fluorosulfate byproducts and water at a hydrolysis reaction temperature to hydrolyze ammonium fluorosulfate, fluorosulfonic acid and bis(fluorosulfonyl)imide to form ammonium bicarbonate and an aqueous hydrogen fluoride solution; and separating ammonium bicarbonate from the aqueous hydrogen fluoride solution.

A process for producing ammonium sulfite and ammonium bisulfite from an ammonia gas stream. The process involves injected sulfur dioxide into a circulating liquid stream to an optimal pH that captures gaseous ammonia from a gas stream. The captured ammonia reacts with sulfur dioxide and water to form the desired products.

The invention provides an ammonia chemical species desorption process capable of desorbing ammonia chemical species adsorbed onto a Prussian blue derivative more simply at lower cost under milder conditions as compared with the use of an aqueous solution of a salt or strong acid, and more efficiently as compared with the use of only water. This ammonia chemical species desorption process comprises an ammonia chemical desorption step of bringing carbon dioxide and water into contact with a Prussian blue derivative represented by the following general formula (1), thereby desorbing an ammonia chemical species.         AxM[M' (CN) 6]y·zH2O ···     (1) where x is 0 to 3, y is 0.1 to 1.5, z is 0 to 6, A is at least one cation of hydrogen, ammonium, an alkaline metal, and an alkaline earth metal, and M and M' are each independently at least one cation of at least one of atoms having atomic numbers 3 to 83 except for ammonium, an alkali metal, and an alkaline earth metal.

The present invention relates to a method of producing green hydrogen and associated products from pyrite separated from mine waste (e.g., disposed tailings or active tailings streams) in an energetically self-sustained process. This is achieved by a method according to the present invention comprising the following steps: (a) separation and enrichment of a mine waste material comprising pyrite to obtain a pyrite concentrate, (b) oxidation of the pyrite concentrate to obtain SO2 gas; (c) separation of the SO2 gas; (d) utilization of SO2 gas from step (c) to generate H2 gas and H2SO4 via a SO2-depolarized electrolyzer (SDE) process or a sulfur-iodine-cycle (S-I-cycle) process.

A process for an efficient carbon-free fertilizer production from renewable resources generates utilizable energy for grid balancing. The integrated fertilizer production process entails the steps of hydrogen production, nitrogen production, ammonia production, nitric acid production, neutralization, and granulation with the utilization of renewable resources of energy such as hydroelectric power, solar photovoltaic power, and wind power.

A method and system are provided for synthesizing nitrogen-containing compounds, including ammonia, urea, amino acids, and ammonium salts, under ambient temperature and pressure conditions without the use of external catalysts or high-energy input. A nitrogen-containing gas and water are introduced into an aqueous solution through a submerged bubble-diffusing component, generating microbubbles that collapse and rupture to form high-energy microenvironments. These environments facilitate in situ molecular dissociation and the formation of reactive nitrogen species, including ammonia as an intermediate. The method supports reaction with co-solutes such as carbon dioxide, organic acids, or inorganic anions to yield target compounds. Optional low-energy augmentations—such as ultraviolet irradiation, ultrasonic agitation, or shear mixing—may enhance yield and selectivity. The system is compatible with isotopic gas variants and can be configured for batch or continuous-flow operation. Applications include decentralized production of fertilizers and biochemical precursors in agricultural, hydroponic, or laboratory settings.

Systems and methods for recovering ammonia from an aqueous solution are disclosed. The systems include a plurality of modules arranged in series, each module having a plurality of membranes, each membrane having a lumen side and a shell side. The plurality of modules include a lead module having a shell inlet fluidly connected to a source of the aqueous solution, an end module having a lumen inlet fluidly connected to a source of an acidic solution, and an optional intermediate module positioned between the lead module and the end module. The methods include directing the aqueous solution to the lead module and directing the acidic solution to the end module to produce an effluent and a product containing ammonium.

A process for producing ammonium sulfite and ammonium bisulfite from an ammonia gas stream. The process involves injected sulfur dioxide into a circulating liquid stream to an optimal pH that captures gaseous ammonia from a gas stream. The captured ammonia reacts with sulfur dioxide and water to form the desired products.

Systems and methods for recovering ammonia from an aqueous solution are disclosed. The system includes more than one module arranged in series, each module having more than one membrane, each membrane having a lumen side and a housing side. The more than one module includes a leading module having a housing inlet fluidly connected to a source of aqueous solution, an end module having a lumen inlet fluidly connected to a source of acidic solution, and an optional intermediate module positioned between the leading module and the end module. The method includes directing an aqueous solution to a leading module and an acidic solution to an end module to produce an effluent and a product comprising ammonium.

The present invention relates to an integrated electrochemical process for the production of ammonium sulfate, operating at low temperature and pressure, using only renewable energy sources and reclaiming phosphogypsum waste and CO2 emissions of the phosphate industry.

A process for treating an ammonium fluorosulfate byproduct includes providing an ammonium fluorosulfate byproduct including primarily ammonium fluorosulfate and lesser amounts of fluorosulfonic acid and bis(fluorosulfonyl) imide, mixing the ammonium fluorosulfate byproduct with water, reacting the mixture of the ammonium fluorosulfate byproduct and the water at a hydrolysis reaction temperature to hydrolyze the ammonium fluorosulfate, the fluorosulfonic acid and the bis(fluorosulfonyl) imide to form ammonium bisulfate and aqueous hydrogen fluoride; and separating the ammonium bisulfate from the aqueous hydrogen fluoride.

The invention discloses a method for preparing ammonium by reducing nitrate radicals by oxidizing modified pyrite with Fe < 3 + >, and belongs to the technical field of water treatment and resource recovery. The method comprises the following steps that S1, acid-washed pyrite and a Fe < 3 + > solution are mixed and oxidized, and oxidation modified pyrite is obtained; and S2, under the anaerobic condition, mixing the oxidation modified pyrite with an alkaline nitrate solution, and reacting in a dark place. According to the method, nitrate can be efficiently and selectively reduced into ammonium, no external energy or noble metal catalyst is needed, the highest removal rate of nitrate can reach 99.8%, the highest conversion rate of ammonium can reach 100%, and the method is suitable for wastewater denitrification and resource recovery treatment.

This invention discloses a method utilizing Fe 3+ This method for reducing nitrate ions in oxidized pyrite to produce ammonium belongs to the field of water treatment and resource recovery technology. The method includes the following steps: S1, reacting acid-washed pyrite with Fe... 3+ The solution is mixed and oxidized to obtain oxidized pyrite; under S2 and anaerobic conditions, the oxidized pyrite is mixed with an alkaline nitrate solution and reacted in the dark. This invention can efficiently and selectively reduce nitrate to ammonium without external energy or precious metal catalysts. The nitrate removal rate can reach up to 99.8%, and the ammonium conversion rate can reach up to 100%, making it suitable for wastewater denitrification and resource recovery.

The present application relates to a kind of energy-saving process technology and device for recovering high-purity ammonia from wastewater, belonging to the field of wastewater treatment in environmental protection.It comprises a deamination tower, a preheater, a wastewater cooler, a heat supplementing and heat exchanging device, a compressor and a throttle valve.The deamination tower comprises a heating section, a deamination section, a condensation section, an ammonia washing section and a purification section.The heating section is provided with compressor working medium inlets and outlets, the deamination section is provided with a wastewater mother liquor inlet, the condensation section is provided with compressor working medium inlets and outlets, the ammonia washing section is provided with a pure water inlet and an ammonia water outlet, and the purification section is provided with a dilute acid aqueous solution inlet and a salt solution outlet.The low-grade waste heat is converted into high-grade heat source by using the compressor, instead of fresh steam, to achieve the purpose of energy saving.The problem of existing technology that tail gas needs to be treated again is solved, tail gas zero emission is realized, and co-production of ammonia water and ammonium salt is achieved.

The invention discloses a photoelectrocatalysis membrane electrode for nitrate nitrogen wastewater treatment, a preparation method of the photoelectrocatalysis membrane electrode and an ammonia recovery coupling integrated device, and belongs to the technical field of photoelectrocatalysis. The photoelectrocatalysis membrane electrode disclosed by the invention has a photoelectrocatalysis synergistic effect. The high dispersity of metal single atoms on carbon nitride enhances the adsorption and activation capability of the membrane electrode to nitrate, and meanwhile, improves the carrier separation efficiency and the photo-induced electron utilization rate, and can realize efficient and stable reduction of nitrate into ammonia with low energy consumption. The continuous flow type photoelectrocatalysis membrane reactor and the ammonia recovery device are integrated, nitrate wastewater is reduced into ammonia at a cathode after entering the photoelectrocatalysis membrane reactor, the ammonia flows out of the ammonia recovery device through a water outlet hole, the ammonia in the wastewater overflows from a hollow fiber membrane and is collected by acid, and the remaining wastewater is recycled to a wastewater pool again. The processes of nitrate photoelectric catalytic reduction and ammonia separation and recovery are realized.

A method for efficient production of carbon-free fertilizers from renewable resources produces available energy for grid balancing. The integrated fertilizer production process requires the steps of hydrogen production, nitrogen production, ammonia production, nitric acid production, neutralization and granulation by using renewable energy sources such as hydroelectric power generation, solar photovoltaic power generation and wind power generation.

The invention belongs to the technical field of medicine synthesis. The invention firstly provides a preparation method of a monochloramine organic solution. On the other hand, the invention provides application of the preparation method in amination reaction or preparation of a compound 4. On the other hand, the invention provides a preparation method of the compound 4. The invention also provides a preparation method of the compounds 2 and 3. The whole process route is short, the cost is low, less three wastes are generated, the post-treatment is simple, the yield is high, the product quality is excellent, and the method is suitable for industrial production.

This invention discloses iron-doped barium titanate nanoparticles and their application in piezoelectric catalytic nitrogen reduction. Iron, titanium, and barium sources are reacted in solution to obtain iron-doped barium titanate nanoparticles. These iron-doped barium titanate nanoparticles are then used to catalyze the reduction of nitrogen to produce ammonium ions (NH4). + This invention utilizes iron-doped barium titanate nanoparticles for piezoelectric catalysis of nitrogen reduction, exhibiting enhanced piezoelectric response and stable catalytic performance. Experiments demonstrate that barium titanate with a 3% iron doping ratio (Fe-BTO-3) achieves a nitrogen fixation and ammonia conversion efficiency of 66.72 μmol·g⁻¹. ‑1 ·h ‑1 (830 μmol·L) ‑1 ·g ‑1 ·h ‑1 This is far higher than the nitrogen fixation capability of currently reported piezoelectric materials.