45results about "Magnesium sulfates" patented technology

The application provides a method for separating magnesium and lithium in brine, comprising the following steps: pretreating the brine to obtain pretreated brine; performing primary nanofiltration, secondary nanofiltration and reverse osmosis concentration on the pretreated brine; the nanofiltration membrane selected for the primary nanofiltration is a carboxylated MOF modified nanofiltration membrane; and the raw materials for preparing the carboxylated modified nanofiltration membrane comprise a support, piperazine, carboxylated ZiF-8 and carboxylated Uio-66. The application reduces the risk of nanofiltration membrane pollution by pretreating the brine, pumps the pretreated brine into a nanofiltration system, generates a cut-off liquid rich in magnesium and sulfate ions and a high-lithium permeate liquid, performs secondary nanofiltration on the cut-off liquid to recover lithium, the secondary cut-off liquid can be used as a resource, the permeate liquid enters a reverse osmosis membrane, the lithium content is concentrated, the concentrated lithium liquid enters a lithium precipitation process, and the method for separating magnesium and lithium in the nanofiltration process realizes the impurity removal process for lithium recovery.

The application belongs to the technical field of wastewater treatment, and particularly relates to a method for separating inorganic salts in a sodium-magnesium sulfate mixed solution. A magnesium salt with relatively large solubility is added to a feed liquid containing sodium-magnesium sulfate, and magnesium sulfate heptahydrate is precipitated at normal temperature and low temperature, respectively, and sodium salt is precipitated at high temperature in the heating and evaporation process, thereby forming a continuous zero-emission disposal sodium-magnesium sulfate separation process. The process has strong universality, is suitable for an aqueous solution system with a mass ratio of magnesium sulfate to sodium sulfate of 1-4, has zero emission in the process, does not pollute the environment, and is an environmentally friendly new technology for separating sodium-magnesium sulfate.

The application provides a magnesium sulfate solution impurity removal device, and belongs to the technical field of magnesium sulfate production. The device comprises an impurity removal box body, a driving assembly, filter cartridges, a flushing assembly, a pushing assembly, a collecting assembly and a lifting assembly. The filter cartridges are arranged in groups, and are annularly distributed inside the impurity removal box body. The filter cartridges are sequentially attached to each other. Filter holes are evenly arranged on the cylinder body of each group of filter cartridges. The flushing assembly is arranged above the filter cartridges. The collecting assembly is arranged below the filter cartridges and corresponds to the flushing assembly. The lifting assembly is arranged at the bottom of the inside of the impurity removal box body. Compared with the prior art, the magnesium sulfate solution can be automatically and on-line cleaned and collected when the magnesium sulfate solution is filtered and impurities are removed, thereby improving the filtering and impurity removal efficiency of the magnesium sulfate solution.

The utility model relates to the technical field of waste resin regeneration, and particularly provides a co-production device for preparing activated carbon from waste resin and recycling waste sulfuric acid, which comprises a resin activation system and a sulfuric acid regeneration system. The method has the beneficial effects that a novel method for preparing the activated carbon from the waste resin is provided; a sulfuric acid regeneration system is matched, so that heat energy and sulfur-containing gas generated during preparation of the waste resin are effectively utilized; low-quality acid generated in the sulfuric acid regeneration process is fully utilized through a matched salt manufacturing system. And no acid gas is discharged in the whole process.

The utility model relates to the technical field of magnesium sulfate purification equipment, in particular to a continuous extraction type magnesium sulfate calcium removal device, which is provided with an extraction device and a water bath device, removes calcium from magnesium sulfate in an anhydrous alcohol continuous extraction manner, and reduces the requirement on a reaction container and the production risk. Comprising a body; the extraction device, the water bath device, the water replenishing device and the extraction device are all mounted on the machine body, and the guide-out device is mounted on the extraction device; the machine body provides support, the extraction device performs continuous extraction on magnesium sulfate, the water bath device performs water bath heating on the extraction device, the water supplementing device supplements water to the water bath device, the extraction device extracts magnesium sulfate in alcohol, and the guiding device is convenient for discharging residual calcium impurities in the extraction device.

The invention belongs to the technical field of wastewater treatment, and particularly relates to an emission reduction method for disperse dye production wastewater. The method comprises the following steps: neutralizing disperse dye mother liquor with industrial magnesium oxide, magnesium hydroxide or magnesium carbonate, and filtering to obtain clarified and neutralized mother liquor containing magnesium sulfate; using the neutralized mother liquor for diluting the disperse dye coupling completion material, then heating for crystal transformation, filtering and washing to obtain a dye filter cake and a salt-containing acidic mother liquor; and neutralizing the salt-containing acidic mother liquor with a magnesium compound, and filtering to obtain a clarified and neutralized mother liquor. And carrying out multiple-effect evaporation concentration and crystallization on the neutralized mother liquor exceeding the recycling amount to extract magnesium sulfate, and using evaporation condensate water for washing a disperse dye filter cake. The neutralization mother liquor is used for replacing clear water to dilute the disperse dye coupling completion material, the viscosity and acidity problems in disperse dye synthesis are solved, the product quality and yield are not affected, the mother liquor is reduced, the water consumption is reduced, meanwhile, the salt concentration of the neutralization mother liquor is increased, and the wastewater evaporation crystallization energy consumption is reduced.

The invention provides a method for separating magnesium and lithium in brine, which comprises the following steps: pretreating the brine to prepare pretreated brine; carrying out primary nanofiltration, secondary nanofiltration and reverse osmosis concentration on the pretreated brine; a nanofiltration membrane selected by the first-stage nanofiltration is a carboxylated MOF (Metal Organic Framework) modified nanofiltration membrane; the carboxylation modified nanofiltration membrane is prepared from the following raw materials: a support body, piperazine, carboxylation ZiF-8 and carboxylation Uio-66. According to the method, brine is pretreated, so that the risk of pollution of the brine to a nanofiltration membrane is reduced, the pretreated brine is pumped into a nanofiltration system, and trapped fluid enriched with magnesium and sulfate ions and high-lithium permeate liquid are generated; the trapped fluid is subjected to secondary nanofiltration to recover lithium, the secondary trapped fluid can be subjected to resource utilization, the permeate liquid enters a reverse osmosis membrane to concentrate the lithium content, and the concentrated lithium liquid enters a lithium precipitation process; magnesium and lithium are separated in the nanofiltration process, and meanwhile, the impurity removal process of lithium recovery is realized.

The invention belongs to the technical field of chemical hazardous waste resourceful treatment, and relates to a treatment method and a treatment system for waste acid generated in an acetylene cleaning process in BDO production. The treatment method comprises the following steps: (1) adding magnesium oxide into the waste acid to neutralize part of sulfuric acid; (2) further adding calcium hydroxide into the waste acid until the pH value of the system is neutral, and carrying out solid-liquid separation to obtain a neutralized solution and a slag phase containing heavy metals and arsenic; (3) carrying out oxidation reaction on the neutralization solution and ozone under the catalysis of a catalyst, then carrying out vulcanization reaction on the neutralization solution and a sodium sulfide solution, filtering a reaction product to obtain filtrate, and crystallizing the filtrate to obtain MgSO4. 7H2O; and (4) mixing the slag phase with sodium tetraborate decahydrate, carrying out a hydrothermal reaction, and drying the product to obtain the Mg5Ca3B2O12 flame-retardant material. According to the treatment method and system, the recycling rate is high, the treatment cost is low, the economic value is high, the environment is protected, the technological process is easier to control, and the high-concentration waste acid generated in the acetylene cleaning procedure is treated.

The present invention relates to a method for increasing the yield of magnesium oxide in a manufacturing process producing essentially magnesium oxide through the valorisation of magnesium-containing waste, wherein the method comprises the steps of: providing acid-generating microorganisms selected from the group of acidophilic microorganisms; providing a first stream comprising sulphur; allowing the microorganisms to interact with the sulphur comprised in the first stream thereby promoting the conversion of the sulphur to form sulphuric acid; providing a second stream comprising magnesium from the manufacturing process producing essentially magnesium oxide; allowing the formed sulphuric acid to react with magnesium in the stream comprising magnesium to form solubilised magnesium sulphate; providing oxalic acid and allowing the oxalic acid to react with the formed solubilised magnesium sulphate to form magnesium oxalate as a precipitate; collecting the formed magnesium oxalate precipitate; and transferring the collected magnesium oxalate precipitate to the manufacturing process producing essentially magnesium oxide, wherein the magnesium oxalate is calcinated to magnesium oxide and thereby increasing the yield of magnesium oxide in the manufacturing process producing essentially magnesium oxide. The present invention also relates to a system using said method.

The invention provides a seawater concentrated water resource regeneration treatment method based on plate nanofiltration, which comprises the following steps of: after concentrated seawater is subjected to plate nanofiltration, settling and separating the concentrated water to obtain gypsum, and extracting the gypsum to obtain mother liquor; the mother liquor after gypsum extraction is subjected to bromine extraction to obtain a bromine product and mother liquor after bromine extraction, the mother liquor after bromine extraction is adjusted to be neutral and subjected to multiple-effect evaporation to obtain condensate water and evaporation mother liquor, the former is partially fed into an external coil pipe of a reaction settler for heat exchange, and the latter is subjected to heat preservation and sedimentation to obtain high-temperature salt slurry and clarified liquor; separating high-temperature salt slurry to obtain magnesium milk and sodium chloride, processing the magnesium milk into a magnesium sulfate monohydrate product, washing the sodium chloride to obtain bitter salt, and feeding part of the bitter salt into concentrated seawater; cooling and crystallizing the clarified liquor to obtain carnallite and mother liquor after carnallite is separated out, washing the carnallite to obtain a potassium chloride product and decomposition washing mother liquor, mixing one part of the two mother liquor with the mother liquor after bromine extraction, feeding the other part of the two mother liquor, condensate water and bitter salt into a magnesium preparation mother liquor pool, and adding caustic soda to obtain a magnesium hydroxide product. According to the method, valuable components in the concentrated seawater can be subjected to resource maximization extraction.

The present invention provides a multi-stage solvent extraction process for selectively extracting cobalt from an aqueous mixed metal solution comprising nickel and cobalt, whereby each solvent extraction stage is characterized by maintaining a magnesium concentration in an aqueous phase above a predetermined magnesium concentration.

The utility model belongs to solid waste resource utilization technical field especially relates to a kind of production system for preparing high-purity magnesium sulfate with solid waste magnesite slurry, it is characterized in that, including solid waste pretreatment unit, reaction kettle, separation unit, drying unit and circulation unit, solid waste pretreatment unit includes crusher and bunker, reaction kettle is lined with enamel, with frequency conversion stirrer and temperature controller, reaction kettle is connected with high-position sulfuric acid tank outlet, high-position sulfuric acid tank is connected with sulfuric acid batching tank by pipeline, sulfuric acid pump, separation unit includes first stage electric centrifuge and second stage electric centrifuge, two-stage electric centrifuge between magnesium sulfate tank and crystallization tank are equipped, circulation unit includes PE mother liquor tank and mother liquor pump, final product is magnesium sulfate heptahydrate or anhydrous magnesium sulfate with water content≤0.5%.The utility model has the advantages that:low-activity solid waste magnesite slurry is converted into >99% purity magnesium sulfate, realizes solid waste high-value utilization conversion, and "zero" wastewater discharge is achieved in whole process.

The invention discloses a waste liquid treatment method for preparing O-methylisourea hydrogen sulfate by a urea method, which aims at overcoming the defects of an organic acid-containing waste liquid treatment method which is high in organic matter content, low in moisture content, high in acid content, high in temperature and explosive, adopts a combined treatment method of alkali and a dispersing agent, and gasifies the dispersing agent through heat generated in a neutralization process; according to the present invention, the heat in the whole reaction process is removed so as to ensure the safety of the reaction process, and the presence of the dispersant reduces the viscosity of the system, simplifies the by-product preparation steps, improves the by-product quality, has advantages of high resource utilization rate, low equipment requirement, low waste liquid component requirement, and effective hazardous waste amount reduction; meanwhile, the dispersing agent can be repeatedly used, the treatment method is simple, the treatment time is short, the treatment efficiency is high, and the method has good environmental benefits and is suitable for large-scale popularization and application.

The utility model relates to the technical fields of chemical industry machinery, in particular to a kind of preparation device of large particle magnesium sulfate heptahydrate, it not only can to magnesium sulfate heptahydrate crystallization, but also can separate out after crystallization magnesium sulfate heptahydrate in solution, it is convenient to use, and labor intensity is low, and practicality is high;Including bottom plate, support and crystallizing cylinder, support is fixedly installed on bottom plate, crystallizing cylinder is fixedly installed in the right part of support, chamber is provided in crystallizing cylinder, the upper end of crystallizing cylinder is set as opening, a plurality of refrigerating plates are provided on crystallizing cylinder, the refrigeration end of multiple refrigerating plates is embedded into the inner side wall of crystallizing cylinder, and the heat dissipation end of refrigerating plate is located at the outside of crystallizing cylinder;It also includes hydraulic cylinder, push rod, filter plate, concentration mechanism, conveying mechanism, stirring mechanism and moving mechanism, hydraulic cylinder is fixedly installed on bottom plate upper end, push rod is slidably installed on crystallizing cylinder, the lower end of push rod is connected with the output end of hydraulic cylinder, and filter plate is fixedly installed on the upper end of push rod.

The present application relates to a kind of preparation methods of high solubility seawater crystal, comprising the following steps: S1, the sodium chloride of predetermined proportion is mixed with calcium chloride, obtain sodium chloride-calcium chloride premix, wherein calcium chloride is screened before mixing Processed;S2, the magnesium chloride of predetermined proportion, magnesium sulfate and potassium chloride are mixed and stirred, then sodium chloride-calcium chloride premix is added, and seawater crystal is prepared after being mixed uniformly.The method can reduce the adhesion of magnesium sulfate and calcium chloride, reduce the generation of insoluble calcium sulfate, solve the existing seawater crystal dissolution problem from the root, effectively improve the solubility of seawater crystal, speed up the dissolution rate, make the ion release more uniform, solve the problem of insufficient dissolution, easy to block, the dissolution effect of finished product is better than prior art.

The utility model relates to the technical field of magnesium sulfate production, disclose a continuous production equipment of magnesium sulfate, including the mixing box, the bottom intercommunication of mixing box has the connecting pipe no.

The invention discloses a method for recovering ammonium and nitrogen from ardealite leachate and co-producing magnesium fluoride, which comprises the following steps: uniformly mixing the ardealite leachate and magnesium salt, then adding first ethanol, adjusting the pH value to be less than or equal to 2.5, and carrying out first stirring reaction and first solid-liquid separation to obtain a solid mixture; washing the solid mixture with water until the pH value is 6-7, and carrying out second solid-liquid separation to obtain magnesium fluoride solid and crude magnesium ammonium sulfate filtrate; and uniformly mixing the crude magnesium ammonium sulfate filtrate with second ethanol, adjusting the pH value to be less than or equal to 2.5, and carrying out second stirring reaction and third solid-liquid separation to obtain a magnesium ammonium sulfate solid. According to the composition characteristics of the ardealite leachate, ammonium nitrogen, fluorine ions, sulfate ions and magnesium salt in the ardealite leachate are directly utilized to react under an acidic condition to generate magnesium ammonium sulfate and magnesium fluoride; the method has the characteristics of simple process, strong adaptability, convenience in operation, mild reaction conditions, low treatment cost, high recovery rate of valuable components, high added value of products and the like.

The utility model belongs to the technical field of magnesium sulfate production, and discloses a magnesium sulfate production high-temperature carbonization furnace which comprises a furnace body, a plurality of carbonization mechanisms are fixedly arranged on the inner side of the furnace body, a feeding mechanism is fixedly arranged on the inner side of the furnace body, the feeding mechanism comprises a bottom frame, the lower surface of the bottom frame is fixedly connected with the inner side of the furnace body, and the carbonization mechanisms are arranged on the bottom frame. Two sliding rails are fixedly arranged on the upper surface of the bottom frame, a feeding frame is arranged on the upper surfaces of the sliding rails, a plurality of sliding blocks distributed in a rectangular array mode are fixedly arranged on the lower surface of the feeding frame, the sliding blocks are in sliding fit with the sliding rails, a feeding box is arranged on the upper surface of the feeding frame in a clamped mode, and positioning plates are fixedly arranged on the two sides of the feeding frame. Through the feeding mechanism, smooth sliding of the feeding frame is achieved, feeding stability and convenience are improved, through the carbonization mechanism, the angle of a carbonization air heater can be flexibly adjusted, and the efficiency and quality of high-temperature carbonization treatment of magnesium sulfate are improved.

The invention relates to the technical field of synthesis of 2-ethyl anthraquinone, in particular to a method for recovering an intermediate from waste sulfuric acid of 2-ethyl anthraquinone, which comprises the following steps: pumping waste sulfuric acid containing 2-ethyl anthraquinone into a reaction tank, starting stirring, adding magnesium oxide mineral powder, heating to 120-140 DEG C, and carrying out heat preservation reaction for 2-6 hours; after the reaction is finished, adding an extracting agent, layering, and respectively collecting an organic phase and a water phase; and washing the organic phase with hot water at 80-90 DEG C, and distilling to remove the extracting agent to obtain the ethyl anthraquinone intermediate 2-ethyl benzoylbenzoic acid. The technical scheme provided by the invention can be directly adapted to the waste sulfuric acid generated by the existing 2-ethyl anthraquinone production process, large-scale transformation of the existing production equipment is not needed, the transformation difficulty is low, and the investment is low; the 2-ethyl benzoylbenzoic acid intermediate can be directly used for subsequent preparation of ethyl anthraquinone, so that a production closed loop is realized, and the economic benefits and environmental protection benefits of the whole production process are improved.

The present application pertains to processes for making calcium oxide and / or sulfuric acid from calcium sulfate. In some embodiments the processes comprise reacting a component comprising calcium sulfate with a second component comprising magnesium sulfite under conditions to form a solid comprising calcium sulfite and a solution comprising magnesium sulfate. Next, at least a portion of the solid comprising calcium sulfite is decomposed to form a second solid comprising calcium oxide, or calcium hydroxide, or cement, or clinker, or any combination thereof.

In some embodiments the application pertains to processes comprising reacting a component comprising an alkaline earth weak acid with a component comprising an acid to form a component comprising an alkaline earth acid anion and a component comprising a weak acid derivative. At least a portion of the component comprising the alkaline earth acid anion is reacted with a component comprising an alkali sulfate to form a component comprising alkaline earth sulfate and a component comprising an alkali acid anion. At least a portion of the component comprising alkaline earth sulfate is decomposed to form a component comprising alkaline earth oxide, or alkaline earth hydroxide, or alkaline earth carbonate, or alkaline earth sulfide, or a derivative thereof, or any combination thereof, and a component comprising sulfur dioxide, or oxygen, or sulfur trioxide, or a derivative thereof, or any combination thereof.

The application discloses a high-value utilization method for smelting high-salt wastewater to prepare magnesium compounds, and belongs to the inorganic chemical field.The method comprises the following steps: using an atmospheric reaction device to mix wastewater containing ammonium and magnesium chloride with magnesium oxide slurry in parallel flow, controlling pH to be 8.5-10.5 and temperature to be 70-100 DEG C, and synchronously realizing ammonia gas volatilization recovery and precipitating and synthesizing basic magnesium chloride; after reaction, washing and solid-liquid separation, the filtrate is treated and discharged up to the standard; the filter cake is calcined to obtain magnesium oxide or is acid-dissolved to obtain magnesium sulfate, and by-products hydrochloric acid are recovered simultaneously.The application couples the wastewater ammonia removal process with the basic magnesium chloride synthesis process, realizes comprehensive recovery and high-value utilization of valuable elements in the wastewater, and has the advantages of short process, low energy consumption, high resource utilization rate, and outstanding economic and environmental benefits.

The invention belongs to the technical field of asbestos tailing utilization, and particularly discloses a separation method of mixed sulfate in serpentine tailing leachate. The separation method provided by the invention comprises the following steps: carrying out quantitative analysis on the serpentine leachate, and adjusting the mass ratio of nickel, iron and magnesium elements in the leachate to a set ratio; carrying out spray drying to obtain mixed sulfate dry powder, placing the mixed sulfate dry powder in a fluidized bed for two-stage roasting, and cooling and aging a roasted thermal decomposition product; and carrying out water leaching on the roasting thermal decomposition product by using a multi-stage countercurrent system, and separating to obtain a magnesium sulfate solution and a nickel / iron oxide. The high-purity high-value magnesium sulfate and nickel / iron oxide products are prepared from the asbestos tailings which are low in cost and harmful to the environment, and the effects of turning waste into wealth, improving the ecological environment and improving the economic benefits of enterprises are achieved.

The invention discloses a post-treatment method of a magnesium precipitation product after deep decalcification of high-calcium magnesium wastewater, which comprises the following steps: the total concentration of impurity ions in a purified solution with the magnesium ion concentration of 30-40g / L is less than or equal to 100ppm, and MgSO4. 7H2O is separated out from the purified solution by adopting a gradient cooling method and is subjected to solid-liquid separation to obtain a first crystal; cleaning the first crystal, and performing centrifugal filtration to obtain a second crystal; and drying the second crystals in vacuum to obtain MgSO4. 7H2O crystals, wherein the moisture content of the MgSO4. 7H2O crystals is less than or equal to 0.5%. According to the method, the purity of the MgSO4. 7H2O crystal can reach 99.9% or above, and the requirement for high purity is met.

The utility model relates to the technical field of purification devices, in particular to a purification device for producing high-purity magnesium sulfate heptahydrate, which provides a place for purification through a storage device, adjusts the temperature of a solution in the storage device through a temperature adjusting device, and lifts a stirring device through a lifting device. The solution in the storage device is stirred through the stirring device, and is dried through the crystallization device; comprising a console; the device further comprises a storage device, a temperature adjusting device, a lifting device, a stirring device and a crystallization device, the storage device, the lifting device and the crystallization device are all installed on the operation table, the temperature adjusting device is installed on the storage device, and the stirring device is installed on the lifting device; the storage device provides a place, the temperature adjusting device adjusts the temperature, the lifting device lifts, the stirring device stirs, and the crystallization device dries.

The utility model relates to the technical field of chemical production devices, and discloses a device for continuously producing magnesium sulfate heptahydrate, which comprises a production tank body, a support frame arranged on the surface of the production tank body, a feeding control device arranged at the top of the production tank body, an internal treatment device arranged inside the production tank body, and gas supply equipment arranged on the left side of the production tank body, the internal treatment device comprises a feeding pipe body, a side end connecting plate, an annular heating ring, a middle pipe fitting, a separation cylinder, a control valve, a reaction kettle, a crystallizer and a top end connecting disc. According to the device for continuously producing magnesium sulfate heptahydrate, the internal treatment device is arranged, the separation barrel and the control valve below are used for controlling the feeding amount, magnesium sulfate is continuously added into the crystallizer below for crystallization treatment, magnesium sulfate heptahydrate production is completed, the double filtering assemblies are arranged, solid impurities and a solution obtained after reaction can be separated, and the magnesium sulfate heptahydrate production efficiency is improved. The treated solution does not have impurities, the feeding amount can be controlled, and the machining precision can be guaranteed.

A method of generating hydrogen gas includes providing a colony of sulfur-reducing bacteria and a colony of sulfur-oxidizing bacteria. The colonies can be submerged in a body of water. The colony of sulfur-reducing bacteria can be used to convert at least a portion of sulfates present in the body of water to hydrogen sulfide. The colony of sulfur-oxidizing bacteria can be used to convert the hydrogen sulfide to sulfuric acid. The sulfuric acid can react with manganese to produce hydrogen gas and manganese sulfate.

The utility model relates to the technical field of circulating type magnesium sulfate monohydrate preparation, in particular to a circulating type magnesium sulfate monohydrate preparation device, which is provided with a stacking mechanism and a feeding mechanism, so that materials can be dispersed in the circulating type magnesium sulfate monohydrate preparation process, uneven heating caused by material stacking is reduced, and the drying quality is improved; comprising a stacking mechanism; the device further comprises a feeding mechanism, a discharging mechanism, a filtering mechanism, a heating mechanism and an air supply mechanism, the feeding mechanism is installed in the stacking mechanism, the discharging mechanism is installed at the lower end of the stacking mechanism, the filtering mechanism is installed at the left end of the discharging mechanism, the heating mechanism is installed at the left end of the filtering mechanism, and the air supply mechanism is installed on the filtering mechanism. The stacking mechanism is used for dispersing materials, the feeding mechanism is used for feeding, the discharging mechanism is used for discharging materials, the filtering mechanism is used for filtering, the heating mechanism is used for heating, and the air supply mechanism is used for supplying air.