91 results about "Co extraction" patented technology

The invention provides a method for extracting lithium salts in lithium-containing brine. Lithium is extracted through a co-extraction agent, an extraction agent and a diluent, wherein the extract is a mixture of an amide compound and a neutral phosphorus oxide compound, the structural formula of the amide compound is shown in the specification, and the structural formula of the neutral phosphorus oxide compound is shown in the specification. The method provided by the invention further optimizes the properties of extracted lithium, so that the method is more applicable to the industrial application.

The invention provides a method for extracting lithium salts in lithium-containing brine through an extraction method. Lithium is extracted through a co-extraction agent, an extraction agent and a diluent, wherein the extract is a mixture of an amide compound and a neutral phosphorus oxide compound, the structural formula of the amide compound is shown in the specification, and the structural formula of the neutral phosphorus oxide compound is shown in the specification. The method provided by the invention further optimizes the properties of extracted lithium, so that the method is more applicable to industrial application.

The invention relates to a method for efficiently extracting lithium from salt lake brine. The method comprises the following steps: (1) forming an extraction organic phase by an extraction agent, a co-extraction agent and a diluent, and then mixing the extraction organic phase with salt lake brine according to the volume ratio of (3-4):2 for three-stage extraction with single extraction time being 2-10 minutes to obtain an organic phase; and (2) mixing the organic phase obtained in step (1) with a reverse extraction acid solution (0-1 mol/L) for three-stage reverse extraction with single reverse extraction time being 2-10 minutes, and collecting an aqueous phase which is an aqueous solution containing lithium ions. The co-extraction agent of an extraction system of the method is hydrophobic ionic liquid, compared with conventional synergist ferric trichloride, the interference caused by iron ions is avoided, the reverse extraction acidity is greatly reduced, more importantly the lithium-magnesium separation factor is significantly improved, and the elution step of magnesium ions is reduced; in addition, the method provided by the invention is easy in process, easy to control, high in operation reliability, and good in recyclability of the organic phase, and greatly reduces the production cost for extracting the lithium from the salt lake brine.

The invention discloses a three-dimensional simulation experiment table which mines coal and gas together. The experiment table includes a box body. The box body is provided with a pressurizing device used for uniformly loading on the rocks in the box body to realize mine pressure simulation. The experiment table is also provided with a coal mining device which can move at the bottom part of the box body to simulate the process of cutting coals by a coal mining machine. The box body is also provided with an air inlet device and a plurality of gas detecting sensors used for the simulation experiment of the gas to move in a porous medium in a mining field during the process of simulating the coal bed mining and the desorption and moving rules of the gas in the coal rock bodies that are relieved from pressure, deformed and crashed during the process of comprehensively researching the coal bed mining to work out the space-time evolvement and distribution rules of the coupling between the gas moving and the coal rock body cranny. Then the simulation research and mining scheme design on mining coal and gas together are carried out according to the researching result.

The invention provides a method for extracting lithium salt from lithium-contained brine by using an extraction process. The method comprises the step of extracting lithium by using a co-extraction agent, an extraction agent and a diluent, wherein the extraction agent is a mixture of an amide compound and a neutral phosphorus oxide compound, the amide compound has the structural formula shown in the specification, and the neutral phosphorus oxide compound has the structural formula shown in the specification. The method provided by the invention is used for further optimizing the performance of the extracted lithium and is more suitable for industrial application.

The invention provides a method for extraction and separation of tungsten and molybdenum. Hydrogen peroxide is filled in the tungsten and molybdenum mixed solution, the pH value is regulated to be acidic, and the acid tungsten mixed solution is taken as a water phase feed liquid to carry out extraction and separation with an organic phase. The organic phase comprises trialkylphosphine oxide, tributyl phosphate and a diluting agent; the organic phase conducts the multi-stage extraction with the water phase feed liquid, molybdenum is extracted into the organic phase, and tungsten is left in a raffinate, so that the separation of tungsten and molybdenum is achieved. The load-bearing organic phase adopts an alkaline back-extraction agent to carry out back-extraction to obtain a molybdenum-contained solution, and the organic phase subjected to the back-extraction returns to the extraction process. Tungsten and molybdenum are extracted and separated in the tungsten and molybdenum mixed solution containing H2O2 by adopting a novel binary mixture extracting agent, the method has the advantages that extraction and the back-extraction are high in split-phase speed, the separation effect of tungsten and molybdenum is good, the tungsten co-extraction loss is low, the loss of the organic phase as well as the environmental pollution is low, the industrialization is easy to realize, and the method is especially suitable for separating tungsten and molybdenum in the tungstate solution with high molybdenum content.

The invention discloses a method for recovering valuable metal from a waste power battery cathode waste material. The method comprises the following steps that (1) the waste power battery cathode waste material is subjected to acid dipping treatment, and a nickel cobalt manganese and lithium containing mixed solution is obtained; (2) the nickel cobalt manganese and lithium containing mixed solution is subjected to impurity removal, nickel cobalt manganese and lithium containing purified liquid and impurity removed liquid or impurity removed residue are obtained; (3) nickel cobalt and manganeseare separated from the nickel cobalt manganese and lithium containing purified liquid through a selective co-extraction method, and nickel cobalt and manganese containing strip liquid and lithium-rich extraction raffinate are obtained; (4) lithium-rich extraction raffinate is subjected to deep impurity removal treatment, and lithium-rich purified liquid and impurity removal liquid or impurity removal residue are obtained; (5) the lithium-rich purified liquid is treated by adopting a bipolar membrane electrodialysis method after being subjected to deep degreasing treatment, and a lithium hydroxide solution and a sulfuric acid solution are generated; and (6) the lithium hydroxide solution is evaporated and concentrated, and a battery-level lithium hydroxide monohydrate and concentrated mother liquid are obtained. The recovery rate of nickel cobalt manganese and lithium is higher than 98%, and appreciation of metal products is achieved while the valuable metal is efficiently recovered.

The invention relates to a co-extraction method for pillar-less coal and gas of advanced entry-retaining construction extraction engineering. The co-extraction method comprises the following steps: firstly, pre-constructing a drill hole on a front directional coal layer of a coal extraction working surface; confirming positions of top and bottom plate of the coal layer in a wedge-shape vertical crack area; before starting a gob-side entry retaining process, drilling gas extraction drill holes on the top plate, bottom plate and two sides of gob-side in front of the coal extraction working surface, and then forward pushing the coal extraction working surface to cross the gas extraction drill holes; while forward pushing, finishing the gob-side entry retaining behind the coal extraction working surface; and sealing the gas extraction drill holes on the top plate, bottom plate and two sides of gob-side when a flow value of to-be-extracted gas pressure is greatly reduced. The drilling construction in the retaining entry is unnecessary, the demand on the size of the cross section of the retaining entry is reduced, the demand on restraining volume of the cross section is reduced and the time for efficiently extracting gas is prolonged.

The invention relates to a method for extracting and separating tungsten and molybdenum in a high-phosphorus mixed solution containing tungsten and molybdenum. The method comprises the following steps: adding hydrogen peroxide in the high-phosphorus mixed solution containing tungsten and molybdenum for acidity adjustment and control, and converting phosphotungstic acid and phosphomolybdic acid into peroxy-phosphotungstic acid and peroxy-phosphomolybdic acid; then, taking a mixture of tributyl phosphate (TBP) and methyl phosphate dimethyl heptyl ester (P350) as an extracting agent, extracting the peroxy-phosphomolybdic acid into an organic phase, and leaving the peroxy-phosphotungstic acid in an aqueous phase; from now on, after decomposing the peroxy-phosphotungstic acid in extraction raffinate in the way of heating or ultraviolet irradiation or introduction of sulfur dioxide, extracting tungsten in the solution again with a fresh mixed extracting agent, and finally realizing extraction and separation of tungsten and molybdenum from complex material liquid. The method is small in tungsten co-extraction loss, can effectively solve the extraction and separation problem of tungsten and molybdenum in the high-phosphorus mixed solution containing tungsten and molybdenum, and is easy to realize industrialization.

Mining method for co-extraction of non-combustible ore and mine methane A method for co-extracting non-combustible ore (e.g., trona) and methane from an underground formation comprising at least one methane-bearing layer and a non-combustible ore bed having a rock roof, comprising:

• • providing a well having a downhole end positioned above the ore bed roof;
  • mining an ore region from an initial cavity and removing the mined ore, thereby creating a subsequent cavity;
  • advancing the mining step to another ore region from the subsequent cavity;
  • allowing the roof of the initial cavity to cave so as to create a gob;
  • repeating the mining, advancing and caving steps, the caving being effective in generating fluid communication between the gob and the well downhole end and in fracturing the methane-bearing layer so as to release methane into the gob; and
  • recovering a gob gas comprising released methane through the well to the surface.

The invention relates to a method for extracting lithium from salt lake brine by an extraction method. The method is suitable for a production process that lithium carbonate and lithium chloride are prepared from high magnesium-lithium ratio salt lake brine and concentrated old brine which contains lithium of salt pan. Co-extraction agent FeCl3, extraction agent and diluent are adopted to carry out lithium extraction, wherein the extraction agent is mixture of neutral phosphorus oxide compound A and phase modifier B, the phase modifier B is organic compound which can generate protonation reaction with the neutral phosphorus oxide compound A in an extraction reaction process, an extraction complex composition obtained after the extraction agent is used for lithium extraction is xLiFeCl4.yHCl.aA.bB, and the extraction complex can be easily dissolved in diluent; an extraction system has good phase splitting performance and reverse extraction and regeneration performance, and the lithium extraction technology of the extraction method is further optimized. The method has a low requirement on equipment, the adopted organic compound is cheap and can be easily obtained, and therefore, the method is suitable for industrial application.

The invention discloses a method for separating magnesium and extracting lithium from salt lake brine with a high magnesium-lithium ratio. With adoption of the method, tributyl phosphate is taken as an extractant, number 200 solvent oil or kerosene is taken as a diluent, perchlorate is taken as a co-extraction agent, and water is taken as a stripping agent to form an extraction system; and lithium carbonate is prepared through extraction, reversed-phase extraction and deep magnesium removal by the salt lake brine. The method has the following beneficial effects: 1. the property of the co-extraction agent is stable, lithium magnesium separation can be carried out in neutral brine and the pH value of an aqueous phase needs not to be controlled; 2. the emulsification phenomenon doesn't exist and a third phase doesn't appear in the extraction process, two phases are easy to separate, the reversed-phase extraction is carried out by water and the device has little corrosion; and 3. the whole technique is simple in process, high in lithium extraction rate, good in separation effect and low in economic cost, is suitable for industrial production of the salt lake brine and is low in environmental damage degree because the co-extraction agent in water can be recycled.

The invention discloses a novel co-extraction system for extraction of lithium from high magnesium-lithium ratio bittern. The novel co-extraction system comprises an extraction agent and a co-extraction agent. The co-extraction agent is a mixture of one or more of potassium hexafluorophosphate, sodium hexafluorophosphate, magnesium hexafluorophosphate, calcium hexafluorophosphate, potassium fluoborate, sodium fluoborate, magnesium fluoborate and calcium fluoborate. The novel co-extraction method for extraction of lithium from high magnesium-lithium ratio bittern comprises extraction, back extraction, deposition for magnesium removal and deposition for lithium acquisition, wherein aiming at bittern with a magnesium-lithium ratio greater than 100, an elution process is used between extraction and back extraction. The novel co-extraction system has simple processes and a high lithium extraction rate, effectively reduces a magnesium-lithium ratio of bittern, has obvious advantages than the traditional ferric trichloride extraction system, can be used for extraction of lithium from salt lake bittern and is especially suitable for solving the problem of high difficulty of extraction of lithium from salt lake bittern with a high magnesium-lithium ratio.

The invention discloses a method for recovering valuable metal from high nickel lithium ion battery cathode scrap. Firstly, manganese and cobalt are selectively extracted from high nickel leaching solution by the solvent extraction method; then, nickel and lithium in the raffinate are further separated by the solvent extraction method; finally, the selective oxidation precipitation method is applied to the manganese and cobalt separated by extraction to precipitate manganese ions to achieve the separation of cobalt and manganese. Compared with the traditional method of sequentially separatingelements from the leaching solution, by virtue of the co-extraction characteristics and the redox property difference of the cobalt and the manganese, the method not only separates the cobalt and themanganese from nickel and lithium in one step, but also separates the cobalt and the manganese with high efficiency, and only the two elements of nickel and lithium are left in the raffinate, so thatthe system is simple and the separation effect is greatly improved. The medicament used in the method is cheap, the operation process is simple, the adverse effect of the excessive nickel component onseparation and extraction can be overcome, and the whole component recovery of nickel, cobalt, manganese and lithium resources in the high nickel lithium ion battery scrap is realized.

The invention discloses a deep coal bed gas and heat co-extraction method. The method comprises the steps that 1, a first vertical drilling well is constructed, a heat-preserving casing pipe is adopted for carrying out gas sealing and heat isolating protection for a well hole; 2, construction of a layering horizontal well is carried out according to the thickness of a coal bed, the layering numberK is determined according to the coal bed real thickness M and the gas drainage radius R, and K is equal to M/2R; 3, a second vertical drilling well is constructed; 4, circumferential dispersing holes of the horizontal well are constructed, and then first extraction of gas is carried out; 5, hydraulic fracturing is carried out on all the drilled holes, a three-dimensional fracture mesh is formed,and then second extraction of the gas is carried out; 6, the first vertical drilling well serves as a water injecting well, the second vertical drilling well serves as a steam output well, the wateris injected into the deep coal bed, the principle of heat transfer is utilized for transferring geothermal energy into the water steam, and the water steam is extracted and utilized. According to themethod, gas extraction and geothermal energy exploitation can be carried out for the deep coal bed which is 1500-3000 meters, the geothermal extraction efficiency is improved, energy is saved, emission is reduced, and the geological environment problems of water and soil pollution, thermal pollution and the like are prevented.

The invention relates to a cleaner production process for synchronously extracting vanadium and aluminum from aluminothermic vanadium iron slag, and belongs to the technical field of metallurgy. The technical scheme is that: the vanadium iron slag is subjected to sodium oxide roasting by using high-proportion Na2CO3 as a roasting transforming agent, vanadium and aluminum of a clinker obtained after sodium oxide roasting are synchronously dissolved out by using an aqueous solution, sodium vanadate crystals containing aluminum hydroxide are crystallized, the purity of the obtained Al(OH)3 is over 95 percent, the purity of vanadium pentoxide is over 98 percent, the co-extraction of the vanadium and the aluminum, the separation of the vanadium and the aluminum and the cyclic utilization of sodium salt are realized, the recovery rate of the vanadium is over 85 percent, the recovery rate of the aluminum is over 60 percent, the weight of tailings is reduced by 40 to 50 percent after leaching, and the tailings can be used for preparing an aluminum-magnesium flocculant by an acid method. The high-efficiency extraction of the vanadium is realized, the resource reutilization of an aluminum element in the slag is also realized, wastewater discharge is avoided in the whole production process, CO2 gas for carbonation can be replaced by roasting flue gas, the proportion of carbon emission isreduced, and the process has remarkable economic and environmental benefits, and can be effectively applied to the treatment of the aluminothermic vanadium iron slag and related materials.

A method for realizing high-efficiency co-extraction of vanadium and tungsten from waste SCR denitration catalysts. The waste SCR denitration catalysts are reacted with sodium hydroxide solution under an oxidizing gas of 0.2-5Mpa and then separated from solids and liquids. The content of vanadium and tungsten in the tailing slag obtained by the method of the invention is low, and the one-time extraction rate of vanadium and tungsten is higher than 95%, which realizes efficient co-extraction of vanadium and tungsten in the denitrification catalyst.

The invention discloses a method for producing lithium carbonate by separating magnesium out of low-lithium bittern and enriching lithium. The method includes the steps of converting salt lake bittern serving as raw materials into halide salt through evaporation dehydration and crystallization separation, directly extracting halide salt through trixylyl phosphate alkane ester or a mixture of trixylyl phosphate alkane ester and monohydric alcohol, obtaining an organic extraction phase and the rest of halide salt after solid-liquid separation, conducting back extraction on the organic extraction phase through water to obtain a low-magnesium-lithium-ratio lithium-rich solution, and obtaining lithium carbonate through condensation and alkalization magnesium removal. The method has the advantages that processes related to the solid-liquid extraction method are simple, co-extraction agents are not needed, the solute distribution drive force is large, and the method is not influenced by bittern extractant two-phase balance; multiple stages of extraction processes are conducted on halide salt, the extraction rate of Li+ is larger than 90%, and the mass ratio of magnesium to lithium in the extraction phase is remarkably decreased; phase splitting is easy due to liquid-liquid back extraction, and the back extraction rates of Li+ and Mg2+ are both larger than 90%; the extraction process is operated under the neutral or weak-acid condition, the production cost is low, and the method is particularly suitable for producing lithium carbonate after separating magnesium out of bittern with the magnesium-lithium mass ratio of 120 or lower.

The invention discloses a method for laterite-nickel ore resourceful treatment and comprehensive recycling. The method includes the main steps of pretreatment, high acid leaching to obtain silicon, precursor iron extracting through magnetic flocculation iron removal, Ni-Co extraction separation, adsorption to obtain manganese, electric flocculation treatment of waste water and magnesium salt work section. The method for laterite-nickel ore resourceful treatment and comprehensive recycling has the following advantages that (1) the process is short; (2) few types of intermediate materials and washing water are used; (3) the change range of potential of hydrogen (pH) value of a solution is small; (4) the heavy metal treatment cost is low; (5) waste water and waste residues can be comprehensively utilized; (6) the nickel recovery rate is high. By means of the novel process route, resources in laterite-nickel ores can be comprehensively utilized, extraction of nickel, cobalt, manganese, iron, magnesium, silicon and the like is included, intermediate residues are not generated, material reverting is also avoided, the comprehensive processing cost is remarkably reduced, and economic benefits and social benefits are remarkable.

The invention relates to a PUREX process for separating technetium. The PUREX process includes the steps: (1) co-decontamination and co-extraction: co-extracting uranium, plutonium, neptunium and the technetium in spent fuel nitric acid solution into an organic phase and washing co-extraction liquid; (2) plutonium and neptunium reverse extraction: reversely extracting the plutonium and the neptunium in the co-extraction liquid into a water phase by reverse extraction agents S1 containing AHA and then adding uranium supplement extraction agents for supplement extraction to obtain the water phase containing the plutonium and the neptunium and an oil phase containing the uranium and the technetium; (3) technetium reduction and reverse extraction: reducing and reversely extracting the technetium in the oil phase containing the uranium and the technetium into the water phase by reverse extraction agents S2 containing reducing agents and then adding uranium supplement extraction agents for supplement extraction to obtain a water phase containing the technetium and an oil phase containing the uranium, wherein the oil phase containing the uranium enters a subsequent uranium purification process. The neptunium, the plutonium and the technetium are reduced step by step through a step-by-step reduction method, the technetium can be separated out, the trend of elements is simpler and more uniform, all the reducing agents are salt-free reagents, remaining reagents are easily damaged, and the subsequent process is less affected.

The present invention provides methods for extraction of sucrose, xylo-oligosaccharides, xylose and bioactive compounds from feedstock, and in particular to the hot-water co-extraction of sucrose, fructose, glucose, xylo-oligosaccharides, or xylose and bioactive compounds from feedstock.

The invention provides a method for naturally culturing Ganoderma lucidum liquid fermentation and fully utilizing a fermentation product. According to the method, a liquid culture medium of Ganodermalucidum was prepared with tomato (or carrot) and bran water extract as growth factor, trace element, organic nitrogen source and sucrose as carbon source. That fermentation conditions were 150 rpm rotation speed, 28 DEG C temperature and 5 d fermentation time. At that end of fermentation, mycelium and fermentation broth are collect, and the mycelium is used for co-extraction of ganoderma lucidum polysaccharide and triterpene to prepare extract containing high-content polysaccharide and triterpene, and the fermentation broth with mycelium removed is used for processing ganoderma lucidum fermented health beverage. The invention can effectively improve the fermentation benefit of Ganoderma lucidum, has no waste generation, does not cause environmental pollution, and has great popularization and application prospect.