231 results about "Ammonium carbonate" patented technology

The invention relates to the technical field of guanidine nitrate preparation, in particular to a method for preparing guanidine nitrate by a continuous dynamic tubular reaction process, which comprises the following steps: uniformly mixing dicyandiamide, target ammonium nitrate and target ammonium carbonate according to a mass ratio of 1: (1-3): (1-0.5); conveying the uniformly mixed material to a feeding section in a dynamic tubular reactor through a first conveying screw rod for mixing treatment, wherein the dynamic tubular reactor further comprises a heating section, a reaction section and a cooling section; sequentially conveying the target mixed material to a heating section for heating melting treatment, a reaction section for synthesis reaction treatment and a cooling section for cooling forming treatment through a second conveying screw rod to obtain an initial product; conveying the initial product into a cooling and crushing device for cooling and slicing to obtain a target guanidine nitrate product. According to the method disclosed by the invention, the mass and heat transfer efficiency can be improved, the online quantity and liquid holdup of the material are reduced, meanwhile, the raw material ratio and the reaction path are optimized, and the safety and the product purity are improved.

The invention discloses a synthesis method of a hydrazine dicarboxylate modified cerium dioxide abrasive, and belongs to the technical field of precise polishing materials. The method comprises the following steps: taking cerous nitrate as a raw material, and preparing a cerous carbonate precursor through an ammonium carbonate precipitation reaction; and grinding and calcining the obtained precursor and hydrazine dicarboxylate to obtain the CeO2 grinding material with the surface rich in oxygen vacancies. And Ce < 4 + > can be partially reduced into Ce < 3 + > by reducing fragments generated by decomposition of the hydrazine dicarboxylate in the calcining process, so that an oxygen vacancy structure is formed through induction, and the chemical activity and the reaction rate of the abrasive are improved. The obtained grinding material shows excellent performance in chemical mechanical polishing (CMP) of K9 glass, the material removal rate (MRR) is increased by about 3.6 times compared with that of unmodified CeO2, the surface roughness (Ra) is reduced to about 0.16 nm or below, and grinding material particles are good in dispersity and less in agglomeration. The used hydrazine dicarboxylate is stable, low in toxicity and mild in reaction, and the particle size can be prevented from excessively growing while the high oxygen vacancy concentration is kept.

The invention discloses a preparation method of CoWO (cobalt tungsten oxide) modified NbOp-n heterojunction NbO5 / CoWO photocatalyst powder. The preparation method comprises the following steps: dissolving cobalt salt and tungsten salt in deionized water, stirring and mixing, carrying out hydrothermal reaction in an autoclave, washing and drying to obtain CoWO powder; the preparation method comprises the following steps: dissolving niobium oxalate and ammonium carbonate in deionized water, adding CoWO powder, carrying out a hydrothermal reaction in an autoclave, and carrying out washing and drying treatment to prepare NbO / CoWO photocatalyst powder. According to the method, the hydrothermal reaction temperature is regulated and controlled, and the mass ratio of raw materials is optimized, so that the catalyst forms a p-n heterojunction structure of NbOmicron flower loaded CoWOnano particles. The prepared catalyst has high norfloxacin wastewater degradation efficiency under visible light irradiation, has the advantages of simple preparation process, low reagent cost, high catalytic activity and good structural stability, and can be effectively applied to purification treatment of antibiotic polluted water.

The invention provides lightweight non-sintered ceramsite prepared from machine-made sand tailing mud as well as a preparation method and application of the lightweight non-sintered ceramsite, and relates to the field of lightweight building materials. The preparation method comprises the following steps: weighing the following raw materials in parts by weight: 50-65 parts of machine-made sand tailing mud, 35-50 parts of fly ash, 10-25 parts of cement, 16-19 parts of quick lime, 1-4 parts of ammonium carbonate and 12-18 parts of water; the method comprises the following steps: dehydrating and crushing the machine-made sand tailing mud, and stirring and mixing the materials in a round pot granulator to obtain an unfired ceramsite mixture; spraying the sodium silicate solution into a granulator at a constant speed to obtain spherical particles; and curing to obtain the light non-sintered ceramsite. The quick lime is used for pretreating the machine-made sand tailing mud, the water content of the machine-made sand tailing mud can be reduced, the machine-made sand tailing mud is successfully granulated, the strength of the ceramsite can be effectively improved, meanwhile, the ceramsite is combined with sodium silicate for alkali excitation, ammonium carbonate is used for foaming, preparation is simple, energy consumption is low, the solid waste utilization rate is high, and economic benefits are remarkable.

The present invention discloses a preparation method and application of nano-dysprosium oxide particles, belonging to the technical field of rare earth material preparation. The preparation method comprises the following steps: preparing a dysprosium nitrate solution; adding deionized water to a reactor, heating the temperature to 50-70°C, and adding a surfactant; slowly adding the dysprosium nitrate solution dropwise for 2-3 hours, controlling the temperature to 50-70°C, adding an ammonium carbonate solution dropwise to control the pH of the system to 5.5-7.5, stirring for 1-2 hours after the addition is completed, obtaining a white precipitate, filtering, and washing to obtain a wet product; and roasting, crushing, and sieving the wet product to obtain nano-dysprosium oxide. The present invention avoids the agglomeration of dysprosium oxide particles during the co-precipitation process by using a prepared polymer surfactant, and the prepared nano-dysprosium oxide particles are uniform in size, have a high specific surface area, and have long-term storage stability.

The invention belongs to the technical field of raw material preparation, and particularly relates to a production method for co-production of isopropanolamine and DL-2-aminopropanol. The production method for co-production of isopropanolamine and DL-2-aminopropanol comprises the following steps: adding ammonium carbonate, ammonium carbamate, epoxypropane and water into a high-pressure reaction kettle, uniformly stirring, heating to 88-90 DEG C, preserving heat for 30-35 minutes under 0.8 MPa, then heating to 100-103 DEG C, reacting for 40-45 minutes under 1.0 MPa, cooling to room temperature, filtering, washing, and drying to obtain the DL-2-aminopropanol. And after the reaction is finished, carrying out post-treatment to obtain a mixture of isopropanolamine and DL-2-aminopropanol. According to the production method for co-production of isopropanolamine and DL-2-aminopropanol, the process is simple, parameters are easy to control, reaction conditions are relatively mild, it is guaranteed that a large amount of monoisopropanolamine and DL-2-aminopropanol are generated, and meanwhile generation of by-products diisopropanolamine and triisopropanolamine is reduced.

The application discloses a preparation method and purification process of copper hydroxide, a certain amount of anhydrous copper sulfate is accurately weighed, and a certain volume of deionized water is added to prepare a solution with a certain concentration, a copper ammonia solution is prepared: slurry is prepared from circuit board sludge, screening is performed, ammonium bicarbonate or ammonium carbonate is added for reaction, and a copper ammonia solution containing carbonate or bicarbonate is obtained through purification; in addition, high-purity copper powder is added into concentrated ammonia water, concentrated hydrogen peroxide solution is slowly dropped into the concentrated ammonia water, and the dropping is continued until no large amount of bubbles is generated in the solution, and the solution is filtered to obtain a clear indigo blue solution. The production process adds the step of adding a stabilizer and stirring, guarantees the stable state of the copper hydroxide crystal, and enables the copper hydroxide crystal to remain unchanged into copper oxide for one year in an environment with a temperature as high as 60 degrees.

The present invention relates to a coking inhibitor for waste heat boilers, belonging to the technical field of ash cleaning for smelting equipment. The components of the coking inhibitor for waste heat boilers of the present invention include: asbestos powder, manganese dioxide, aluminum oxide and ammonium carbonate. The present invention can control the coking thickness of the convection tube bundle and there is a peeling phenomenon, slow down the growth rate of the coke body, effectively solve the adhesion problem of the flue gas system of the fluidized bed boiler waste heat boiler, and reduce the safety and environmental protection risks.

The invention discloses a green process method for extracting alkali metal from composite ore, and relates to the field of metal extraction.The green process method comprises the following steps that S1, aluminosilicate composite ore containing alkali metal and ammonium carbonate are mixed and roasted, and activated clinker is obtained; s2, mixing the activated clinker with an ammonium citrate solution, carrying out a leaching reaction at 80-95 DEG C, and carrying out solid-liquid separation after the reaction to obtain a leaching solution and leaching residues; according to the green process method for extracting the alkali metal from the composite ore, through systematic coupling of a low-temperature ammonium carbonate activation-ammonium citrate complexing leaching-manganese system / ammonium phosphomolybdate specific adsorption-bipolar membrane electrodialysis closed-loop regeneration technology chain, a synergistic interaction effect is formed; the activation step significantly improves the leaching efficiency of the subsequent mild leaching agent.

The invention discloses a method for preparing nano calcium carbonate by using fluorite leachate, and belongs to the technical field of hydrometallurgy. According to the method, metallurgical-grade fluorite is subjected to magnetic separation iron removal and hydrochloric acid solution leaching, high-purity fluorite and a calcium chloride solution are obtained, and meanwhile carbon dioxide gas is generated; removing impurities from the calcium chloride solution, reacting the calcium chloride solution with an ammonium carbonate solution to form a calcium carbonate emulsion, aging the calcium carbonate emulsion, filtering and separating to obtain nano calcium carbonate and filtrate; heating the filtrate to generate hydrogen chloride and ammonia gas, absorbing hydrogen chloride by water to form a hydrochloric acid solution, and recycling; ammonia gas and carbon dioxide are absorbed by water to generate an ammonium carbonate solution for recycling. According to the method, the metallurgical-grade fluorite is purified, meanwhile, the nano calcium carbonate product with the high additional value is prepared through the fluorite leaching solution, cyclic utilization of hydrochloric acid, ammonium carbonate and the like can be achieved, and the method has the advantages of being environmentally friendly, capable of saving energy, reducing consumption, simple, efficient and the like and is beneficial to large-scale application and popularization.

The invention relates to the technical field of tea aroma detection, in particular to a noble metal-sensitized volatile aroma substance sensor construction and detection method, which comprises the following steps: dissolving zinc acetate dihydrate, urea and trisodium citrate dihydrate in deionized water to obtain a mixed precursor solution; controlling the hydrothermal reaction of the precursor solution; after naturally cooling to room temperature, washing, centrifuging, drying and calcining to obtain a zinc oxide material; the preparation method comprises the following steps: impregnating a zinc oxide material with deionized water, adding an ammonium carbonate solution while stirring, stirring, and then adding a noble metal solution to obtain a noble metal modified zinc oxide mixed solution; centrifuging, drying and calcining to obtain a powder zinc oxide loaded noble metal material; dissolving the zinc oxide loaded noble metal material in ethanol, performing ultrasonic treatment to form turbid liquid, and further dispensing the turbid liquid to the surface of a planar electrode to construct a semiconductor sensor for detecting tea aroma; the sensor prepared by the method has excellent sensing characteristics of high sensitivity, high stability and the like on tea aroma.

The application discloses a catalyst for preparing malononitrile, a preparation method of the catalyst and a method for preparing malononitrile by using the catalyst. The catalyst is a solid catalyst, which is an acidic catalyst loaded with rare earth metal oxide. The method for preparing malononitrile is that cyanoacetic acid or cyanoacetate or cyanoacetamide and an ammonia source are subjected to ammoniation dehydration reaction in a continuous reactor to prepare malononitrile according to a certain molar ratio. Then, vacuum distillation (20 torr-25 torr) is carried out, and a fraction collected at 110 DEG C-120 DEG C is malononitrile product. The ammonia source can be ammonia gas, ammonia water, ammonium carbonate or urea. The method for preparing malononitrile can reduce production cost, improve production safety, reduce the discharge amount of three wastes in the preparation of malononitrile by using an existing process, and improve product quality, and is a sustainable and green synthesis route.

The application provides a catalytic denitration agent and a preparation method thereof, and comprises the following components: a reducing base: urea 30-60 parts, ammonium carbamate 10-25 parts, ammonium carbonate 5-15 parts, ammonium bicarbonate 5-15 parts; a phase change catalytic component: ammonium dihydrogen phosphate 2-6 parts, di-ammonium hydrogen phosphate 1-5 parts, molybdate 0.05-0.5 parts, tungstate 0.1-0.8 parts, organic acid metal salt 0.1-0.8 parts, modified zeolite 1-8 parts; a functional additive: dispersant 0.2-1.0 parts, surfactant 0.1-0.6 parts, corrosion inhibitor 0.05-0.2 parts. The application constructs a multi-component complex catalytic system, and the prepared high-molecular catalytic denitration agent can realize the unity of wide-temperature high-efficiency denitration, low corrosion, low ammonia escape and high operation stability while significantly reducing the phase change temperature and energy consumption, and effectively solves the multiple problems of harsh reaction conditions, unstable efficiency and equipment corrosion in the prior art.

Described herein are methods for stabilizing a subterranean formation. The method may include introducing urea into a subterranean formation, wherein the subterranean formation includes sand, and wherein the subterranean formation includes a calcium salt, and introducing an amylase into the subterranean formation, wherein the amylase hydrolyzes the urea to form ammonium carbonate, and calcium in the calcium salt reacts with carbonate in the ammonium carbonate to form a calcium carbonate precipitate.

The invention provides a silica gel carrier and a preparation method thereof. The preparation method comprises the following steps: providing a first silicate aqueous solution with the pH value of 9-10 as a base solution; mixing the second silicate aqueous solution, inorganic acid and the base solution, and aging at 70-80 DEG C to obtain a first mixed solution with the pH value of 9-13; mixing the first mixed solution, an alkaline substance and organic alcohol, adjusting the pH value to 10-12, and carrying out a first reaction to obtain a second mixed solution; mixing the second mixed solution, an alkaline substance and organic alcohol, adjusting the pH value to 11-12, and carrying out a second reaction to obtain a hydrogel system; mixing the hydrogel system with inorganic acid, and adjusting the pH value to 5-6; performing post-treatment to obtain a silica gel carrier; wherein the alkaline substance comprises one or a combination of more than two of ammonia water, ammonium carbonate and ammonium bicarbonate. The silica gel carrier provided by the invention has excellent pore structure and particle size distribution.

This application relates to the field of materials, and provides a method for preparing all-starch foamed tableware. By weight, the all-starch foamed tableware comprises the following components: 85-92 parts of composite modified starch, 23-38 parts of plant cellulose, 1-2 parts of foaming agent, 3.5-7 parts of nucleating agent, 1-1.5 parts of plasticizer, and 3-6 parts of crosslinking agent; wherein the foaming agent includes at least one of sodium bicarbonate, ammonium bicarbonate, and ammonium carbonate; the nucleating agent includes at least one of talc, calcium carbonate, montmorillonite, diatomaceous earth, straw powder, chitosan, and cyclodextrin; the plasticizer includes at least one of glycerol, sorbitol, ethanol, and water; and the crosslinking agent includes at least one of citric acid, malic acid, tartaric acid, maleic acid, succinic acid, and adipic acid. This application not only comprehensively improves the water resistance, heat resistance, mechanical strength, and cell uniformity of the all-starch foamed tableware, but also ensures that the product meets usage requirements.

The invention discloses a method for comprehensively recycling yellow phosphorus slag of an electric furnace, and belongs to the technical field of chemical engineering. Comprising the following steps: grinding slag, adding nitric acid in proportion, reacting dicalcium silicate in the slag with nitric acid to generate calcium nitrate and silicon slag, and reacting calcium nitrate with ammonium carbonate to prepare an ammonium nitrate product and a calcium carbonate product; and washing and separating the silicon slag to obtain orthosilicic acid, returning one part of orthosilicic acid to be re-blended with the phosphate ore to enter the furnace so as to recycle the slag, and calcining the rest part of orthosilicic acid to obtain a white carbon black product. The use amount of silica is reduced, mineral resources of silica are saved, and the use amount of silica produced from yellow phosphorus reaches self-balance.

The invention relates to the technical field of comprehensive utilization of vanadium titano-magnetite resources, in particular to a flotation combined reagent and a flotation method for vanadium titano-magnetite associated ultralow-grade cobalt-nickel ore. The flotation combined reagent comprises a copper ammonia compound activating agent composed of copper sulfate, ammonium carbonate and sodium citrate, a compound inhibitor composed of sodium humate, tannic acid and sodium tripolyphosphate, a main collecting agent butyl xanthate, an auxiliary collecting agent alkyl hydroxamic acid and a foaming agent diethylene glycol monobutyl ether. According to the method, a technical system of bulk flotation process-novel collaborative reagent system is constructed, so that the technical problem of recycling associated ultralow-grade cobalt and nickel resources in the vanadium titano-magnetite iron separation tailings is successfully solved, the problem of low separation efficiency of ultralow-grade minerals is effectively solved, a complete and efficient technical scheme is formed, and the method is suitable for industrial production. And an innovative technical path is provided for comprehensive recovery of associated cobalt and nickel resources of the vanadium titano-magnetite.

The invention belongs to the technical field of metallurgy, and particularly relates to a preparation method of high-fluidity tantalum oxide. According to the method, ammonium carbonate is adopted as a precipitator, ammonium carbonate can react with various metal ions to generate insoluble precipitates, high selective precipitates are achieved, precipitation reaction can be accurately controlled, and side reactions and unnecessary impurity precipitates are reduced. By-products of the reaction of ammonium carbonate and fluotantalic acid are water and carbon dioxide, and new impurities are not introduced, so that the quality of the final product is favorably improved. The preparation method provided by the invention is easy to operate and control, the solution with the required concentration is prepared, and the precipitation rate and degree can be conveniently controlled in the reaction process; meanwhile, complex equipment and strict condition control are not needed, laboratory and industrial field operation is facilitated, and equipment investment and operation and maintenance cost are reduced; by-products can be effectively recycled, environmental pollution is reduced, and the requirement of sustainable development is met.

The invention provides a metallocene catalyst and a preparation method and application thereof. The method comprises the following steps: providing a first silicate aqueous solution with the pH value of 9-10 as a base solution; mixing the second silicate aqueous solution, inorganic acid and the base solution, and aging at 70-80 DEG C to obtain a first mixed solution; mixing and reacting the first mixed solution, an alkaline substance and organic alcohol to obtain a second mixed solution; mixing and reacting the second mixed solution, an alkaline substance and organic alcohol to obtain a hydrogel system; mixing the hydrogel system with inorganic acid to obtain acidified gel; performing first post-treatment to obtain a silica gel carrier; carrying out thermal activation on the silica gel carrier, and mixing and reacting with an aluminum alkyl solution to obtain MAO modified silica gel; and mixing the MAO modified silica gel with a metallocene compound, reacting, and carrying out second post-treatment to obtain the metallocene catalyst, wherein the alkaline substance comprises one or a combination of more than two of ammonia water, ammonium carbonate and ammonium bicarbonate. The metallocene catalyst has good catalytic activity.

This invention discloses a method for treating wastewater containing magnesium sulfate and ammonium sulfate. The method includes: evaporating and concentrating the wastewater containing magnesium sulfate and ammonium sulfate, then cooling and crystallizing it, followed by solid-liquid separation to obtain magnesium ammonium sulfate crystals and a mother liquor containing ammonium sulfate; reacting the magnesium ammonium sulfate crystals with an ammonium salt that can generate carbonate ions and water to undergo a precipitation reaction, followed by solid-liquid separation to obtain magnesium carbonate product and a mixed solution containing ammonium sulfate and ammonium carbonate; stripping the mixed solution containing ammonium sulfate and ammonium carbonate to obtain stripped water containing ammonium sulfate and an ammonium carbonate fraction; both the mother liquor containing ammonium sulfate and the stripped water containing ammonium sulfate can be evaporated and crystallized to obtain ammonium sulfate product; the ammonium carbonate fraction can be recycled for precipitation reactions. This invention can effectively separate magnesium and ammonium from wastewater, and the separated magnesium carbonate and ammonium sulfate products have high purity and good quality, and can be used directly as products.

The application discloses a method for improving the purity of sodium bicarbonate and the filtering efficiency during the resource utilization of sodium chloride, and comprises the following steps: (1) carbonization; (2) separation and washing of sodium bicarbonate solid, and obtaining carbonization mother liquor; (3) deacidification: adding ammonium bicarbonate into the carbonization mother liquor during the deacidification, and making the added ammonium bicarbonate all be converted into ammonium carbonate, obtaining deacidification mother liquor, and returning the gas generated during the deacidification to the carbonization reaction solution in the step (1); (4) crystallization; (5) separation of ammonium chloride, and returning the obtained crystallization mother liquor to the carbonization reaction solution in the step (1).

The invention discloses a method for synthesizing a lead-free piezoelectric catalytic material based on a hydrothermal technology and a product, and belongs to the field of catalytic materials and pollution abatement, the synthesis method of the lead-free piezoelectric catalytic material comprises the following steps: mixing and stirring an ammonium carbonate solution and a soluble zinc salt solution, carrying out hydrothermal reaction to obtain a reaction product solid, and drying the reaction product solid to obtain the lead-free piezoelectric catalytic material. Calcining the reaction product solid in an air atmosphere at 400-500 DEG C to obtain a calcined product; further putting the calcined product into water for ultrasonic treatment, then adding soluble bismuth salt, stirring and mixing, putting into a hydrothermal reaction kettle for hydrothermal reaction at 160-180 DEG C, and obtaining the lead-free piezoelectric catalytic material after the reaction is finished. The component of the lead-free piezoelectric catalytic material is ZnO (at) Bi2O2 (OH) NO3, and the lead-free piezoelectric catalytic material is a two-dimensional sheet-shaped stacked nano material and shows a rapid and efficient piezoelectric catalytic characteristic.

The invention discloses an inorganic enhanced electronic cigarette oil guide rope and a preparation method thereof, and relates to the technical field of oil guide ropes. The nano aluminum oxide particles and the polyester fibers are blended to prepare the low-fiber-density core layer oil guide cotton, a large amount of tobacco tar can be stored, and the problem of carbon deposition is effectively relieved; the high-density glass fiber oil guide cotton is adopted as the outer layer, so that a directional oil guide channel is formed while the mechanical strength is ensured, and the effects of large oil storage quantity and high oil guide speed are achieved; the outer layer oil guide cotton is coated with the modified coating liquid and bonded to the periphery of the core layer to prepare the oil guide rope of the electronic cigarette, integration of a double-layer structure is achieved, and the oil guide performance of the outer layer is improved. The modified coating liquid is doped with ammonium carbonate when titanium dioxide is prepared through a hydrothermal method, porous titanium dioxide is formed, the tar guiding efficiency is improved, meanwhile, the existence of ammonium ions can adjust the acidity and alkalinity of tobacco tar, and the service life of the tar guiding rope is prolonged; and then forming a coating liquid with fluorocarbon resin, so that the adhesive force of the coating and the oil guide cotton is enhanced, and the overall mechanical property is enhanced.

The invention discloses an alumina carrier with a special morphology and a preparation method thereof. The preparation method comprises the following steps: (1) preparing an ammonium bicarbonate solution and / or an ammonium carbonate solution as a hydrothermal medium; (2) uniformly mixing pseudo-boehmite with a hydrothermal medium, and sealing; (3) putting the sealed material into an ultrasonic reactor for ultrasonic pretreatment; (4) carrying out hydrothermal treatment on the pretreated material, and filtering and drying the material subjected to hydrothermal treatment to obtain fibrous ammonium aluminum carbonate powder; (5) uniformly mixing the fibrous ammonium aluminum carbonate powder and a forming aid, and then adding a solution prepared from a peptizing agent and water for mixing and kneading; and (6) extruding, drying and roasting the material to obtain the fibrous alumina carrier. According to the preparation method disclosed by the invention, distribution of active metals is promoted by improving the surface morphology of the carrier, so that the activity of the catalyst is improved.

The invention belongs to the technical field of medicinal preparations, and particularly relates to a method for producing medicinal calcium carbonate with low content of chlorine, barium, magnesium and iron ions, which comprises the following steps: adding purified water into a general zone reaction kettle 1, adding calcium oxide while stirring, and reacting to obtain calcium hydroxide; dropwise adding concentrated hydrochloric acid into a system of the reaction kettle 1 under the condition of controlling the temperature, and after dropwise adding, carrying out heat preservation reaction until the end to obtain a calcium chloride solution; adding purified water into a general area reaction kettle 2, then adding ammonium carbonate, and stirring until the solution is clear to obtain an ammonium carbonate solution; filtering the ammonium carbonate solution in the reaction kettle 2 through a millipore filter membrane to enter a reaction kettle 3 in a clean area, filtering the calcium chloride solution in the reaction kettle 1 through the millipore filter membrane, dropwise adding the calcium chloride solution into the reaction kettle 3, and centrifuging to obtain a calcium carbonate wet product after the heat preservation reaction is finished; adding purified water into the calcium carbonate wet product, pulping, centrifuging and drying to obtain the medicinal calcium carbonate. On the basis of a double decomposition method, the method has the advantages of simplicity in operation, low cost, capability of realizing mass production and the like.

Systems and processes for producing ammonia products and calcium carbonate products, the latter containing sequestered carbon dioxide, from an effluent derived from one or more organic feedstocks. Solids are removed from an organic feedstock that contains a nitrogen compound to produce an organic liquid effluent that contains ammonium and / or ammonia. Ammonia is stripped and concentrated from the organic liquid effluent to produce a gaseous mixture that contains ammonia and carbon dioxide, and the gaseous mixture is cooled to produce a condensed aqueous ammoniacal nitrogen solution of aqueous ammonia, ammonium bicarbonate, and / or ammonium carbonate. The condensed aqueous ammoniacal nitrogen solution is then contacted with a stabilizing agent to cause a reaction therebetween to produce at least a stabilized ammoniacal nitrogen product and calcium carbonate in which carbon dioxide captured in the ammonium bicarbonate and / or the ammonium carbonate is sequestered.

The invention discloses a liquid energetic material composed of non-dangerous chemical raw materials and a preparation method of the liquid energetic material, the liquid energetic material is formed by mixing an oxidizing agent concentrated solution and glycerin in proportion, and the oxidizing agent concentrated solution is obtained by mixing calcium ammonium nitrate, ammonium carbonate and water in proportion and then conducting filtration and vacuum concentration. According to the invention, the prior art is greatly improved, and the three raw materials are all non-dangerous chemicals, so that the traffic and storage safety in the long-time land and marine transportation process in the offshore oilfield operation can be greatly improved; the mode of obtaining the liquid energetic material on site is simple, and seamless butt joint operation with existing liquid gunpowder deflagration fracturing can be achieved; the influence of temperature on solubility is overcome, the composition proportion is moderate, the system can be completely dissolved after being prepared, the operation water adding amount is reduced by utilizing crystal water in the raw materials, and the preparation method is suitable for the environment in shortage of water resources.

The invention discloses a method for preparing vanadium pentoxide from vanadium slag and vanadium pentoxide. The method comprises the following steps that the vanadium slag is subjected to roasting, clinker leaching and purification in sequence, and purified liquid is obtained; extracting the purified liquid by using a CO3 < 2-> and / or HCO3 <-> type extraction agent to obtain a vanadium-containing organic phase; the vanadium-containing organic phase is subjected to reverse extraction through a reverse extraction agent, and vanadium-containing reverse extraction liquid is obtained; adding ammonium salt into the vanadium-containing strip liquor, cooling and precipitating to obtain ammonium metavanadate; and calcining the ammonium metavanadate to obtain vanadium pentoxide. According to the scheme, the purification liquid is separated in an extraction mode to obtain the vanadium-containing organic phase, meanwhile, the vanadium-containing organic phase is subjected to reverse extraction of vanadium through the mixed solution of the sodium carbonate, the ammonium carbonate and the ammonia water, the stability of the vanadium-containing reverse extraction liquid is improved through introduction of the sodium carbonate, and the problem that when the vanadium is subjected to reverse extraction through the mixed solution of the ammonium salt and the ammonia water is solved. The problems of device wall scabbing, pipeline blockage and the like caused by crystallization and separation of ammonium metavanadate are solved.

The invention provides a method for preparing a catalyst from solid waste, the catalyst and application of the catalyst, and relates to the technical field of catalysts. The method for preparing the catalyst from the solid waste comprises the following steps: mixing solid waste containing alkaline metal oxide, active metal salt, ammonium carbonate and water, and carrying out ball milling to obtain a catalyst intermediate; and drying the catalyst intermediate, and roasting to obtain the catalyst. The catalyst is prepared by using the method for preparing the catalyst by using the solid waste. The catalyst is used for catalytic hydrogenation reaction. According to the method for preparing the catalyst from the solid waste, the solid waste resource serves as a carrier, the alkaline metal oxide rich in the solid waste resource can serve as an auxiliary agent to improve the reaction effect so as to solve the problems that the conversion rate and selectivity are low, the early-stage investment cost is low, the solid waste resource which cannot be utilized can be recycled, and low cost and high return are achieved; and environment-friendly continuous preparation is realized.