171 results about "Sodium hydrosulfide" patented technology

The invention discloses an efficient combined regulator for easily-argillized copper oxide cobalt ore and a beneficiation method. The efficient combined regulator comprises the following components in parts by weight: 250-350 parts of sodium citrate and 1100-1200 parts of sodium hydrosulfide. Sodium citrate has high dispersing capacity, and the efficiency of selective adsorption between the argillization copper-cobalt ore and the medicament can be improved; meanwhile, the complexing ability of sodium citrate on ions, such as Fe, Ca and Mg, influencing agent adsorption on the surface of the ore is high, in addition, products obtained after complexing of the Fe, Ca and Mg ions can be dissolved in water, and action sites are provided for selective adsorption of a vulcanizing agent (NaHS) and a collecting agent amyl xanthate (PAX). According to the combined regulator and the beneficiation method provided by the invention, the problem of poor reagent selectivity in the flotation process of the argillization copper-cobalt ore can be obviously improved, the vulcanization effect of a vulcanizing agent is enhanced, and selective adsorption of a collecting agent is promoted, so that the recovery rate of copper and cobalt metals in the copper-cobalt oxide ore under the condition of serious ore argillization is improved.

The invention discloses low-VOC (volatile organic compound) environment-friendly end-capped mercapto silane as well as a preparation method and application thereof.The preparation method comprises the following steps: by taking chloroalkyl trialkoxysilane and linear alkyl polyether alcohol as raw materials, reacting to form an intermediate c; reacting alkyl acyl chloride with sodium sulfide or sodium hydrosulfide to form an intermediate e; and reacting the intermediate c with the intermediate e to obtain a final product. Silane is used as a rubber auxiliary agent, so that the volatilization amount of alcohols in the internal mixing process of a rubber compound can be greatly reduced, the emission amount of VOC during operation is reduced, meanwhile, the vulcanization performance of a rubber material can be improved, the scorching time of the rubber material can be prolonged, the reinforcing effect of vulcanized rubber can be improved, the physical and mechanical properties of the vulcanized rubber can be improved, and the wet skid resistance of tread rubber can be improved; therefore, the environment-friendly rubber auxiliary agent is a multifunctional environment-friendly rubber auxiliary agent.

The invention discloses an arsenic removal method for purifying waste acid, and belongs to the technical field of sulfuric acid preparation. The method comprises the following steps: settling wastewater, and carrying out filter pressing on slurry through a first filter press; in the first-stage reaction tank, the waste acid reacts with a desulfurizing agent from a sodium hydrosulfide preparation tank, and after the reaction is completed, the waste acid is sent to a first-stage FBL filter to be filtered; in the second-stage reaction tank, the waste acid reacts with a desulfurizing agent from the sodium hydrosulfide preparation tank, and after the reaction is completed, the waste acid is sent to a second-stage FBL filter to be filtered; the filtrate of the second-stage FBL filter is sent to a dynamic wave scrubber for recycling; a flocculating agent is added into the first-stage FBL filter and the second-stage FBL filter; tail gas of the first-stage reaction tank, the first-stage FBL filter, the second-stage reaction tank, the first-stage FBL filter and the sodium hydrosulfide preparation tank is sent to a spray tower, washing liquid containing sodium hydrosulfide and sodium sulfide in the spray tower is sent to the sodium hydrosulfide preparation tank, and sodium hydrosulfide solids are added into the sodium hydrosulfide preparation tank.

The present invention relates to the technical field of nanofiltration membranes, and particularly relates to a preparation method for a nanofiltration membrane for regulating and controlling membrane surface charges. The preparation method comprises: step 1: (1) sequentially adding piperazine, a fiber additive, an ionic liquid and polyvinyl pyrrolidone into deionized water to obtain a water phase; and (2) adding trimesoyl chloride into normal hexane to serve as an oil phase; step 2, dipping a base membrane in the water phase for 1-3 minutes, and removing the redundant water phase; transferring same into the oil phase and subjecting same to polymerization for 2-3 minutes, and removing the redundant solution; and curing same at 80-85ºC for 5-6 minutes, and dipping same in deionized water for 1-2 days, so as to obtain a composite base membrane; and step 3, firstly placing the composite base membrane in a sodium hypochlorite solution for a primary post-treatment, and cleaning same; and transferring same into a sodium hydrosulfide solution for a secondary post-treatment, washing same until neutral, soaking same in deionized water for 1-3 days, and drying same to obtain a nanofiltration membrane.

The utility model provides a sodium hydrosulfide concentration and purification device, and belongs to the technical field of sodium hydrosulfide processing. Comprising an evaporation tank and a separator, a heating chamber is fixed on the inner wall of the evaporation tank, a large flow channel is arranged close to the center of the heating chamber, a small flow channel is arranged on one side of the heating chamber close to the inner wall of the evaporation tank, a central circulating pipe is fixed on the inner wall of the large flow channel, and the evaporation tank is connected with the separator through a pipeline. Through the arrangement of the waterproof motor, the driving fan blade, the driven fan blade and the scraping plate, the waterproof motor drives the driving fan blade to rotate to enable sodium hydrosulfide in the central circulating pipe to forcibly flow downwards, so that the circulating efficiency of the sodium hydrosulfide in the evaporating tank is enhanced, and the evaporating efficiency of the sodium hydrosulfide is improved; sodium hydrosulfide drives the driven fan blades to rotate, the driven fan blades drive the scraping plates to rotate on the inner walls of the small flow channels, the scraping plates scrape off sodium hydrosulfide crystals in the small flow channels, the crystals are prevented from affecting heat transfer, and the evaporation efficiency is further guaranteed.

The invention discloses a flotation process for pressurizing and stirring sulphide ore, and relates to the technical field of sulphide ore flotation. Crushing and ore grinding; blending ore pulp; carrying out secondary ore grinding to obtain flotation ore pulp; wherein ore pulp is pumped into the grinding cylinder, an extrusion part is installed in the grinding cylinder, and the extrusion part extrudes the ore pulp to crush internal particles; the grinding component enters the bottom later; adding an activating agent, wherein the activating agent comprises copper sulfate and sodium hydrosulfide; copper flotation, zinc flotation and sulfur flotation are conducted in sequence, the areas are separated at intervals through separation nets, and lifting separation is conducted through a lifting mechanism on the top; scavenging and tailing treatment are conducted on the cleaned tailings, wherein after the scavenged tailings are subjected to thickening treatment, overflow water directly returns to the ground ore in the first step to be used; and tailings are subjected to follow-up treatment, so that the technical problems that more types of particles are easily adsorbed during diameter mixing flotation, and the high-quality product rate of each concentrate is low are solved.

The invention provides gas-electricity coupled gelatin and sodium alginate composite hydrogel as well as a preparation method and application thereof, and belongs to the technical field of biological materials. The gas-electricity coupled gelatin and sodium alginate composite hydrogel disclosed by the invention is prepared from the following raw materials in parts by weight: 1 to 10 parts of gelatin, 1 to 10 parts of sodium alginate, 0.1 to 1 part of polyphenol modified fibroin microfiber coupled with 3, 4-ethylenedioxythiophene, 0.05 to 0.5 part of sodium hydrosulfide loaded bovine serum albumin nanoparticles, 1 to 10 parts of polyethylene glycol diglycidyl ether and 100 to 200 parts of water. The hydrogel has good biocompatibility and mechanical properties, is good in stability, can slowly release hydrogen sulfide gas, has relatively good conductivity, has anti-inflammatory and immunoregulation effects, can attract stem cells and promote angiogenesis and bone formation, has an excellent repair effect on diabetic periodontitis, and has a good application prospect.

The invention relates to a method for continuously producing 2, 5-dihydroxy-1, 4-dithiane, which comprises the following steps: pre-cooling a chloroacetaldehyde solution and a sodium hydrosulfide solution, mixing in a pipeline mixer, reacting in a reaction kettle, continuously producing, and post-treating to obtain a finished product, the molar yield is more than 95%, the content is more than 98%, the melting point is 140-145 DEG C, and the appearance is white granular crystal. And the requirements of downstream products can be better met. The method has the characteristics of high efficiency, continuous production, stable process, high product quality, high yield, low cost, environmental friendliness and convenience in industrial popularization.

The invention relates to the technical field of high-molecular polymer synthesis, and particularly discloses a cracking method of high-alkalinity polysulfide rubber latex, which comprises the following steps: S1, carrying out mother liquor separation on polysulfide rubber latex, and then washing for 0-2 times to obtain the high-alkalinity polysulfide rubber latex; and S2, cracking the high-alkalinity polysulfide rubber latex into liquid polysulfide rubber by using a cracking agent composed of sodium sulfite, sodium hydrogen sulfite and sodium hydrosulfide, wherein the molecular weight of the liquid polysulfide rubber is 1000-5000. Compared with the prior art, the cracking agent composed of sodium sulfite, sodium hydrogen sulfite and sodium hydrosulfide is adopted, high-alkalinity polysulfide rubber latex can be cracked, the washing frequency is reduced, the process efficiency is improved, and the overall polysulfide rubber production efficiency is indirectly improved; meanwhile, the wastewater discharge amount is reduced, and the subsequent wastewater treatment cost is reduced. The raw materials required by the cracking agent are easy to obtain and low in cost.

The invention relates to the technical field of polyphenylene sulfide, in particular to low-molecular-weight polyphenylene sulfide low in chlorine and easy to purify and a preparation method thereof.The method comprises the steps that 1, sodium hydroxide, sodium acetate and sodium hydrosulfide with the required amount are sequentially put into a reaction kettle, then N-methyl pyrrolidone is added, and heating dehydration is conducted under nitrogen protection to obtain a mixed solution; step 2, adding preheated paradichlorobenzene into the mixed solution, adding a part of phase control agent at the required polymerization temperature and under the protection of nitrogen, and carrying out prepolymerization stage reaction; and step 3, after the prepolymerization stage is completed, carrying out segmented temperature control on the reaction system, adding the residual phase control agent, carrying out polymerization stage reaction, and after the reaction is completed, obtaining the low-molecular-weight polyphenylene sulfide which is low in chlorine and easy to purify. The low molecular weight polyphenylene sulfide with low chlorine radical residue and low ash content is prepared, the phase control agent is easy to prepare and low in price, and the preparation method is easy and convenient to operate and convenient to popularize and apply.

The invention provides a preparation method of a magnetic recoverable catalyst and a method for synthesizing 3-mercaptopropionic acid, and mainly solves the problem that a large amount of acid and alkali solutions are needed in the existing acrylonitrile-sodium hydrosulfide and acrylic acid-thiourea process routes. The thiohydracrylic acid synthesis catalyst is prepared. The use conditions of the catalyst are as follows: the temperature is 30-80 DEG C, the reaction pressure is 0.5-3 MPa, the mass ratio of the acrylic acid to the solvent is 0.1-5, and the mass ratio of the acrylic acid to the catalyst is 0.2-20. Compared with the prior art, the catalyst disclosed by the invention is used as a synthetic catalyst for preparing thiohydracrylic acid through reaction of acrylic acid and hydrogen sulfide, a solid catalyst and a liquid reaction system can be completely separated by adopting simple methods such as filtration, centrifugation or magnetic separation, and a complicated pickling step is not needed; and the problem that a homogeneous catalyst is difficult to rectify after salification in the use process is avoided.

The utility model relates to the technical field of chemical engineering, in particular to a sodium hydrogen sulfide solution storage tank flushing system which comprises a magnetic turning plate liquid level meter, a remote transmission liquid level meter, a sodium hydrogen sulfide storage tank, a condensation water pipeline, an upper flushing line, a lower flushing line and a remote transmission flushing line. A lower end inlet of the magnetic flap liquid level meter is connected with a lower end drain valve; a first short-circuit wire is led out from the sodium hydrosulfide storage tank to be connected to an outlet in the upper end of the magnetic flap liquid level meter, a second short-circuit wire is led out from the sodium hydrosulfide storage tank to be connected to an outlet in the lower end of the magnetic flap liquid level meter, a third short-circuit wire is led out from the sodium hydrosulfide storage tank to be connected to the remote transmission liquid level meter, and a remote transmission shower valve is arranged on the third short-circuit wire. On-line flushing of the sodium hydrogen sulfide solution storage tank is achieved, when liquid level display is different from remote liquid level, water flushing is carried out, checking is carried out again after flushing, and the operation risk is reduced.

The present invention relates to a preparation method and application of a black soldier fly worm sand biomass carbon-based solid acid catalyst. The preparation method comprises the following steps: first, the black soldier fly worm sand is sieved with a sieve, and then the sieved black soldier fly worm sand is added to a sodium hydrosulfide solution and stirred and soaked for several hours. The pretreated black soldier fly worm sand is washed three times with deionized water and dried in an oven for 24 hours. Finally, the pretreated and dried worm sand is pyrolyzed and carbonized at high temperature in a nitrogen atmosphere for several hours to obtain a biochar-based solid acid catalyst material. The present invention uses biomass worm sand as raw material, which is cheap and easily available, reduces the production cost of solid acid catalysts and biodiesel, and improves the utilization value of renewable resources. In the present invention, the carbon-based material is pretreated with a sodium hydrosulfide solution, which not only improves the acid catalytic activity of the catalyst, but also improves the pore structure of the catalyst, thereby improving the catalytic activity of the carbon-based material as a whole, and is expected to become a highly competitive clean process route.

The utility model relates to the technical field of sodium hydrosulfide deamination, and particularly discloses a sodium hydrosulfide deamination device which comprises a kettle body, a stirring frame is mounted on the upper surface of the kettle body, a feeding pipe is communicated with the upper surface of the kettle body, a discharging pipe is communicated with the lower surface of the kettle body, a heating medium inlet pipe is communicated with the surface of the kettle body, and a heating medium outlet pipe is communicated with the heating medium inlet pipe. The surface of the kettle body is communicated with a hot coal outlet pipe, the surface of the kettle body is provided with a heat preservation structure, the surface of the heat preservation structure is provided with two supports, the two supports are fixedly connected with the surface of the kettle body, the two supports are fixedly connected with the upper surface of the kettle body, and plug pins are slidably inserted into the surfaces of the supports. A limiting arm is slidably inserted into the inner wall of the support, a limiting hole is formed in the surface of the limiting arm, and the size of the limiting hole is matched with the size of the plug pin. The utility model solves the problem that the outer surface of the reaction kettle is inconvenient to install heat preservation cotton for heat preservation and is easy to dissipate heat.

The invention relates to the technical field of chemical material preparation, and particularly discloses a safe preparation method of a short fluorocarbon alkyl sulphobetaine surfactant, a product and application, and the safe preparation method comprises the following steps: (1) in a solvent system I, reacting epoxy chloropropane with secondary amine to obtain an intermediate 1; (2) in a solvent system II, reacting the intermediate 1 with sodium hydrosulfide or a hydrate thereof to obtain an intermediate 2; (3) reacting the intermediate 2 with short fluorocarbon alkyl iodide to obtain perfluoroalkyl thioether propyl tertiary amine; and (4) carrying out sulfonation treatment on perfluoroalkyl thioether propyl tertiary amine to obtain the short-fluorocarbon alkyl sulphobetaine surfactant. According to the invention, by designing a synthetic route without using a high-risk reagent, the safety and operability of the process are remarkably improved, and the sulphobetaine surfactant with excellent acid, alkali and salt chemical stability and excellent surface activity is successfully prepared; and a key material and a safe and reliable preparation process are provided for development of a new-generation efficient environment-friendly fire extinguishing agent.

The utility model provides a sodium hydrosulfide solution decolorizing device, and belongs to the technical field of sodium hydrosulfide solution processing. Comprising a reaction kettle, a stirring shaft is rotatably connected in the reaction kettle, and two round pipes fixedly penetrate through a kettle cover of the reaction kettle. Through the arrangement of the annular box, the inner dispersion boxes and the outer dispersion boxes, a potassium hydrogen sulfite solution flows into the annular box after passing through the round pipe, flows to the positions of the inner dispersion boxes and the outer dispersion boxes, is primarily dispersed by the inner dispersion boxes and the outer dispersion boxes, and is discharged from the bottoms of the inner dispersion boxes and the outer dispersion boxes; the discharged potassium bisulfite solution flows to a splitter plate of the shunting assembly and is shunted again by the splitter plate, and the splitter plate slowly rotates along with the stirring shaft in the shunting process, so that the dispersing area of the potassium bisulfite solution is increased, the potassium bisulfite solution is dispersed and then mixed with the sodium hydrosulfide solution, the stirring time for mixing the potassium bisulfite solution and the sodium hydrosulfide solution is shortened, and the stirring efficiency is improved. The reaction rate of the two is increased, so that the decolorization efficiency of the sodium hydrosulfide solution is improved.

The invention provides a method for removing chemical oxygen demand by using a catalyst prepared from acid mine wastewater, which comprises the following steps: recovering valuable elements in the acid mine wastewater, accurately adding sodium hydrosulfide to control conditions, recovering transition metal elements with catalytic activity in the acid mine wastewater by fractional precipitation, directionally preparing a nano-scale metal catalyst, and removing the chemical oxygen demand by using the catalyst prepared from the acid mine wastewater. And the chemical oxygen demand in the wastewater is degraded through the prepared nano-scale metal catalyst, so that the problem of environmental pollution caused by the mine wastewater and the wastewater containing the chemical oxygen demand is solved, and the dual effects of resource recovery and environmental treatment are realized.

The invention belongs to the technical field of nano materials, and particularly relates to a polyoxazoline coated gold nano cage and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: (1) heating an ethylene glycol solution, then adding sodium hydrosulfide, hydrochloric acid, polyvinylpyrrolidone and silver trifluoroacetate for reaction, then standing the mixture to prepare silver nanocubes (AgNc), and washing the obtained AgNc with acetone and deionized water; (2) adding tetrachloroauric acid into the obtained AgNc solution, carrying out an electric replacement reaction to generate a gold nanocage (AuNc), and washing with ethanol and ultrapure water to remove impurities after the reaction is completed; and (3) adding 3-thiohydracrylic acid into the obtained AuNc solution to enable gold and sulfydryl to form a coordinate bond, and then adding poly (2-ethyl-2-oxazoline) to coat AuNc to form a final product, namely the polyoxazoline coated gold nanocage (AuNc (at) PEtOx). The preparation method of AuNc (at) PEtOx provided by the invention is simple, convenient and efficient; in addition, AuNc (at) PEtOx has good photo-thermal characteristics when exposed to laser with the wavelength of 808 nm.

The invention belongs to the technical field of chemicals, and discloses a synthesis method of dithioerythritol, which comprises the following steps: S1, mixing cis-1, 4-dichloro-2-butene, acetone and water, cooling to below zero, adding potassium permanganate, keeping the temperature to react for a certain time after the potassium permanganate is added, filtering and collecting filtrate, then extracting, collecting extract liquor, evaporating, cooling and crystallizing to obtain dithioerythritol; filtering and collecting solids, and drying to obtain 1, 4-dichloro-2, 3-butanediol; and S2, mixing 1, 4-dichloro-2, 3-butanediol, sodium hydrosulfide and methanol, carrying out a reflux reaction, filtering, evaporating methanol, adding dichloromethane, adding magnesium sulfate, dehydrating, freezing, crystallizing, filtering, collecting a solid, and drying to obtain the dithioerythritol. The method has the beneficial effects that substances such as cis-1, 4-dichloro-2-butene, sodium hydrosulfide and potassium permanganate are adopted as raw materials, the price is low, the raw materials are easy to obtain, the process is simple, the yield is high, and compared with an existing method, the scheme has the advantages that the raw material cost is greatly reduced, the product yield is increased, and the method is suitable for enterprise production.

The application discloses a kind of complex antimony-containing material high-efficiency antimony leaching method, solve the problem of low efficiency of antimony leaching and difficult solid-liquid separation when using conventional sodium sulfide alkali method to leach antimony.By alkali leaching and arsenic removal, copper and bismuth removal by chlorine salt reduction and acid leaching, and NaHS+NaOH combined antimony leaching after treatment, high-efficiency leaching and enrichment of antimony in complex antimony-containing material is realized.Compared with the leaching effect of sodium sulfide, the leaching efficiency of antimony is significantly improved, and the leaching rate of antimony in the process of NaHS+NaOH combined antimony leaching is stable at more than 96%.Compared with sodium sulfide, sodium hydrosulfide has the advantages of low price, low sodium content, low temperature and difficult crystallization, etc., so using sodium hydrosulfide instead of sodium sulfide to leach antimony can effectively reduce production cost, reduce sodium content in high-salinity wastewater from the source, and avoid the disadvantages of using liquid sodium sulfide storage tank, conveying pipeline, etc.

The invention relates to a polycarboxylic acid water reducer and a preparation method thereof, and belongs to the technical field of polycarboxylic acid water reducers. The polycarboxylic acid water reducer comprises the following components: isopentenyl polyoxyethylene ether, acrylic acid, an acrylate monomer, modified talcum powder, sodium lignin sulfonate, sodium gluconate, ethylene glycol monovinyl polyethylene glycol ether, ammonium persulfate, methyl ethyl ketone peroxide, sodium hydrosulfide, a chain transfer agent and deionized water. The prepared water reducing agent has excellent fluidity, dispersibility and mechanical strength after being added into concrete.

The invention relates to the technical field of polyphenylene sulfide, in particular to low-molecular-weight polyphenylene sulfide and a preparation method thereof.The preparation method of the low-molecular-weight polyphenylene sulfide comprises the steps that sodium hydroxide, sodium acetate and sodium hydrosulfide with the required amount are sequentially put into a reaction kettle, then N-methyl pyrrolidone is added, heating dehydration is conducted under nitrogen protection, and a mixed solution is obtained; adding preheated paradichlorobenzene into the mixed solution, adding part of an end-capping reagent at the required polymerization temperature under the protection of nitrogen, and carrying out prepolymerization stage reaction; and after the pre-polymerization stage is finished, carrying out temperature programming on the reaction kettle, adding the residual end-capping reagent, and carrying out polymerization stage reaction to obtain the low-molecular-weight polyphenylene sulfide. According to the invention, a specific amount of the end-capping reagent is added in the stages of prepolymerization and polymerization reaction, so that the chain growth of the polymerization reaction of the polyphenylene sulfide is actively terminated, and the low-molecular-weight polyphenylene sulfide with the molecular weight of less than 8000, narrower molecular weight distribution and good melting and viscosity properties is prepared.

The utility model relates to the technical field of sodium hydrosulfide multistage reaction, and particularly discloses a sodium hydrosulfide multistage reaction device, which comprises a reaction kettle and a kettle cover, the surface of the reaction kettle is communicated with a feeding pipe and a transmission pipe, the surface of the reaction kettle is provided with a limiting structure, the limiting structure comprises a fixed plate, and the fixed plate is provided with a plurality of through holes. The fixing plate is fixedly connected with the surface of the reaction kettle, the surface of the fixing plate is rotatably connected with a two-way screw rod, the surface of the two-way screw rod is in threaded connection with two driving arms, the sides, close to each other, of the two driving arms are fixedly connected with clamping plates, and the size of the clamping plates is matched with the size of a conveying pipe; a round rod penetrates through the surface of the driving arm in a sliding mode, the round rod is fixedly connected with the surface of the fixing plate, and one end of the two-way screw rod is fixedly connected with a rectangular rod. According to the utility model, the problem that the transmission pipe is inconvenient to disassemble for maintenance and cleaning due to connection in a welding manner is solved.

The utility model relates to a calcium carbonate solid waste treatment device, and discloses a treatment device for calcium carbonate solid waste generated by sodium hydrosulfide purification, which comprises a box body, a plurality of spray heads and two crushing rollers, a filter assembly is arranged in the box body, and the two crushing rollers are arranged in the filter assembly and are rotatably connected with the inner wall of the box body; a driving assembly for driving the annular screen to rotate is arranged in the box body, a water conveying assembly is arranged in the box body, the multiple nozzles are arranged on the water conveying assembly, a blocking assembly for blocking nozzles of the multiple nozzles is arranged on the water conveying assembly, and a feeding pipe for conveying materials into the filtering assembly is arranged in front of the box body. The plane of the inclined panel makes contact with the nozzles of the multiple sprayers, due to the elastic force of the two springs, the plane of the inclined panel blocks the nozzles of the multiple sprayers all the time, and powder generated when calcium carbonate solid waste is broken is prevented from entering the nozzles of the sprayers, blocking of the nozzles is avoided, and damage to the nozzles is avoided.

The utility model relates to a kind of multi-stirring efficient vulcanization reaction kettle, including tank body, mixer and gas pipe, the liquid outlet of the mixer is connected with the side of tank body intercommunication;The side of tank body away from mixer is equipped with liquid outlet;Tank body bottom is equipped with slag outlet;Slag outlet is equipped with slag valve;The gas pipe is set in tank body top, and one end of gas pipe is inserted into tank body, and the other end is connected with gas conveying device.The utility model can mix waste acid and vulcanizing agent fully by mixer;And hydrogen sulfide gas is delivered to tank waste acid by gas pipe, so that hydrogen sulfide gas and waste acid react, conveniently recycle hydrogen sulfide gas, reduce the consumption of sodium hydrosulfide and sodium hydroxide, reduce processing cost.

The high-precision purification equipment comprises a distillation box and a condensation pipe, the lower end of the inner surface of the distillation box is movably connected with a second connecting shaft, the outer surface of the second connecting shaft is fixedly connected with stirring blades, and the right end of the top of the distillation box is fixedly connected with a sleeve; the left front end of the sleeve is communicated with the top of the distillation box through a one-way pipe. According to the sodium hydrosulfide distillation device, a sodium hydrosulfide solution is fed into the distillation box from the feed port, the heating plate is opened, the sodium hydrosulfide solution can be heated, steam generated by heating enters the front end of the inner cavity of the sleeve through the one-way pipe, enters the condensation pipe through the pipeline and finally enters the collection box through the pipeline, and in the process, the steam can enter the distillation box through the pipeline. The steam can blow the fan blades to rotate, the fan blades can drive the first connecting shaft to rotate when rotating, and the fan blades can drive the second connecting shaft to rotate under the cooperation of the single-face tooth synchronous belt, so that the stirring blades are used for stirring the sodium hydrosulfide solution, and the purification efficiency is effectively improved.

The invention discloses a method and a system for purifying a magnesium sulfate solution. The method comprises the following steps: pretreating a magnesium sulfate solution containing nickel and cobalt impurities to remove suspended matters and organic matters in the magnesium sulfate solution; adding sodium hydrosulfide into the pretreated magnesium sulfate solution, enabling nickel and cobalt to respectively react with the sodium hydrosulfide to generate precipitates, and carrying out solid-liquid separation to obtain the purified magnesium sulfate solution and precipitates containing nickel sulfide and cobalt sulfide; evaporating and crystallizing the purified magnesium sulfate solution to obtain magnesium sulfate crystals, and drying to obtain a magnesium sulfate product; and carrying out post-treatment on the precipitate containing the nickel sulfide and the cobalt sulfide, and recovering nickel and cobalt in the precipitate. The method can efficiently remove nickel and cobalt impurities in the magnesium sulfate solution, has the advantages of high efficiency, environmental protection, recoverable resources and the like, and can reduce the production cost and improve the resource utilization rate.

The invention belongs to the technical field of tail gas recovery and utilization, and particularly relates to a crude benzene hydrogenation device ammonia-sulfur tail gas double-effect recovery and comprehensive utilization device which comprises a first base, an ammonia washing tank, a second base, a desulfurizer and the like. The first base and the second base are arranged side by side and serve as a mounting carrier of the device, an ammonia washing tank is mounted on the first base, water for dissolving ammonia gas is arranged in the ammonia washing tank, two openings are formed in the lower part of the ammonia washing tank, one opening is a waste gas inlet for introducing ammonia-sulfur tail gas, and the other opening is an ammonia water outlet. Through combination of the ammonia washing tank, the desulfurizer and the boiler room, ammonia and hydrogen sulfide in tail gas are gradually removed, ammonia water generated by the ammonia washing tank is fed into the boiler room for denitration, ammonia gas emission is reduced, a reducing agent needed by denitration is provided for the boiler room, and the boiler room can be recycled. And the sodium hydrosulfide solution generated in the desulfurization process can be sold as a commodity, so that the economic benefit is increased.

The invention discloses a method for beneficiating uranium-containing gold ore. According to the mineral composition characteristics of the uranium-containing gold ore and the distribution characteristics of useful minerals, the uranium-containing gold ore is crushed, ground and classified, the coarse-grained ore is firstly recovered by a shaking table, and then a flotation agent composed of a water glass inhibitor, a sodium hydrosulfide activator, an amyl xanthate and an alkylaminocarboxylic acid combined collector is used to flotate and recover the gold; the fine-grained ore is recovered by centrifugal reselection, and then the coarse-grained and fine-grained tailings are combined, and a flotation agent composed of a lead nitrate and ferric sulfate combined activator, an isooctyl phosphate and a tetradecylamine combined collector is used to flotate and recover uranium, and finally the uranium is further recovered by strong magnetism, which not only realizes the comprehensive recovery of gold and uranium, but also can discard most of the tailings. The gold grade in the total gold concentrate is 56.34g / t, the recovery rate is 97.08%, the uranium grade in the total uranium concentrate is 0.196%, the recovery rate is 70.59%, the tailings yield is 87.06%, the gold grade is 0.14g / t, and the uranium grade is 0.003%.

The invention relates to the field of wastewater treatment, and discloses a biological treatment process for sodium hydrosulfide production high-sulfur wastewater, which comprises the following steps: S1, culturing and activating active bacteria; s2, pretreating high-sulfur wastewater generated in the production process of sodium hydrosulfide; s3, introducing the wastewater into a multi-stage microbial battery reaction system; s4, dynamically regulating and controlling a microbial metabolism path in the multi-stage reaction system by arranging an intelligent bio-membrane reactor; s5, passing through a dual-electrode system and a tail end filtering device of a by-product control system; and S6, recovering electric energy generated in the microbial battery reaction system through an energy recovery system. Through a multi-stage microbial battery series connection structure, a continuous reaction path from high-concentration degradation to terminal deep purification is formed, the technical effects of keeping stable reaction efficiency and low residual rate under the condition of treating sulfides with different concentrations are achieved, and the problems that degradation capability is easy to attenuate and tail water fluctuates severely in a later treatment stage are solved.