70 results about "Mercuric sulphide" patented technology

A method and apparatus for reducing mercury in industrial gases such as the flue gas produced by the combustion of fossil fuels such as coal adds hydrogen sulfide to the flue gas in or just before a scrubber of the industrial process which contains the wet scrubber. The method and apparatus of the present invention is applicable to installations employing either wet or dry scrubber flue gas desulfurization systems. The present invention uses kraft green liquor as a source for hydrogen sulfide and/or the injection of mineral acids into the green liquor to release vaporous hydrogen sulfide in order to form mercury sulfide solids.

The invention discloses and proposes a high-efficiency quantum dot light emitting diode with a self-assembly polymer hole transmission layer structure. Except a positive electrode and a negative electrode, the high-efficiency quantum dot light emitting diode comprises a three-layer structure: a hole transmission layer, a quantum dot light emitting layer and an electron transmission layer, wherein one end of the quantum dot light emitting layer is connected with the hole transmission layer, the other end of the quantum dot light emitting layer is connected with the electron transmission layer, the electron transmission layer is organic nanoparticles after doped, the hole transmission layer is formed by doping a monomer, a polymer, small-molecule, inorganic oxidized metal nanoparticles or a two-dimensional nanometer material into poly(3,4- ethylenedioxythiophene monomer), a quantum dot is quantum dots of zinc sulfide, zinc selenide, cadmium sulfide, cadmium selenide, cadmium telluride, mercury sulfide, mercury selenide, mercury telluride or core-shell nanometer structured cadmium selenide-zinc sulfide, cadmium sulfide-zinc sulfide, cadmium sulfide-zinc selenide and graphene thereof and the like, and the negative electrode is glass or polyethylene terephthalate (PET) with a layer of indium tin oxide (ITO) or fluorine-doped tin oxide (FTO) or graphene.

The invention relates to a wet ammonia flue gas purification process for the combined sulfur and mercury removing and the system thereof. The process adopts chlorine gas as oxidizing agent to completely oxidize elemental mercury in the flue gas, and gas phase divalent mercuric ion after being oxidized is converted into liquid phase divalent mercuric ion through the improved wet ammonia desulphurization process, and further the liquid phase divalent mercuric ion is converted into stable mercuric sulfide sendimentation through liquid phase divalent mercuric ion stabilizing agent. The system comprises a flue gas oxidizing demercuration preprocessing system composed of an oxidizing agent injection device and an electrostatic precipitator, a wet ammonia flue gas sulfur and mercury removing system composed of a reaction absorbing tower, a sulfur removing accessory substance processing system composed of a cyclone cleaner, a dewaterer, and a dryer, and a mercuric sulfide HgS sendimentation processing system composed of a wastewater buffer pool, a liquid phase mercuric ion reaction chamber, and a settling pond. The process and the system can effectively improve the oxidation rate of the elemental mercury in the flue gas, overcome the defaults that the divalent mercuric ion is easy to be reduced and released and the secondary pollution problem is caused by excess oxidizing agent, and greatly improve the efficiency of sulfur removing and mercury removing.

A Chinese medicine external-use preparation medicament for treating surgery wound infection and a method for producing the same. The medicament has the raw materials of pangolin scales, dragon's blood, notoginseng, red halloysite, frank incense, myrrh, artificial mercuric sulphide, black catechu, pearl powder, drgon's bones, calomelas, borneol and gingelly oil. The medicament is mild in temperament, has no toxicity and side effect and is easy for dressing change. The prescription activates blood and resolves stasis, regenerates tissue, tonifies qi, benefits blood, takes temporary solution and effects a permanent cure. The producing method need simple facilities, saves energy and water, has short production period, low cost and no pollution and solves the adverse reaction in the surgery usual wound infection treatment due to frequently externally changing applied medicament and frequently removing necrosis infection tissue.

The invention relates to a method for removing mercury in flue gas by using chalcohalide compound modified absorption. The method is characterized in that: compound containing sulphur and halogen or its precursor is used as modifier for supported modification for adsorbent to make the surface mercury absorption characterization of absorbent change, The weight percentage of supported chalcohalide compound in absorbent is 0.01 to 10%, and the modified absorbent is connected with flue gas in flue gas filling and direct blowing-in manner direct for flue gas mercury removal. The modified absorbent is provided with high absorption capacity for mercury in flue gas, and mercury can be converted to stable mercuric sulphide by using the modified absorbent, as a result, the secondary pollution can be solved.

The invention discloses a desulfuration and mercury-removing combined smoke purifying process and system based on a magnesium oxide method desulfuration process. The desulfuration and mercury-removing combined smoke purifying process comprises the steps of: improving a pre-washing tower in the magnesium oxide method desulfuration process, circularly spraying original smoke by adopting a halogen oxidant solution to realize full oxidization of elementary substance mercury Hg0 in smoke; transforming oxidized gas-phase bivalent mercury ions into liquid-phase bivalent mercury ions through an improved wet-type magnesium oxide method desulfuration process; and transforming the liquid-phase bivalent mercury ions in a wastewater treatment system into a stable mercuric sulfide precipitate through adding a mercury stabilizing agent. The system mainly comprises the pre-washing tower, a desulfuration tower, a cyclone separator, a vacuum belt fulter, a wastewater basin and a sedimentation basin, wherein the pre-washing tower is used for preparing a mercury oxidant and a magnesium oxide solution and oxidizing mercury; the desulfuration tower is used for carrying out desulfuration and mercury removal on smoke; the cyclone separator and the vacuum belt fulter are used for treating side products; and the wastewater basin and the sedimentation basin are respectively used for treating wastewater and the mercuric sulfide precipitate. The process can be used for effectively removing divalent mercury and elementary substance mercury in the smoke on the premise of ensuring the advantages of the magnesium oxide method desulfuration process, and is suitable for reconstructing the traditional magnesium oxide method desulfuration process.

Aiming at the problems that the mercury-containing waste residue produced in the smelting industry is complicated in component, difficult to recycle, high in environmental risk and the like, the invention discloses a method for selectively recycling mercury from smelting waste residue. The method has the characteristics of short technological process, simple operation, wide application range, no pollution and the like, can realize efficient and selective recycling of mercury in the complicated smelting waste residue, and is favorable for reducing the pollution of the mercury-containing waste residue to the environment. The method comprises the following specific steps: performing oxygen-enriched chloridizing roasting to convert mercury sulfide, mercury sulfate and the like which are steadyand difficult to volatilize in the mercury-containing waste residue into mercury chloride which is easy to volatilize, thereby realizing selective separation of mercury; and absorbing mercury chloride volatilized into a gas phase by using alkali liquor, and performing hydrolysis to obtain mercury oxide precipitate, thereby realizing recycling of mercury.

The invention adopts a sulfide precipitation method and an auxiliary adsorption method to remove mercury from mercury-containing wastewater. A wastewater mercury removal device adopts a mercury sulfide precipitation method which comprises the following steps: mainly adopting intermittent operation; adding sulfide in a certain proportion according to the content of mercury in the water; reacting to generate mercury sulfide precipitates; filtering and separating after flocculation and sedimentation; recycling after performing deep adsorption treatment on obtained crude filtrate through activated carbon. The process can effectively treat the mercury-containing wastewater, reduces environmental pollution, and has better application prospects.

The present invention relates to an ultrasonic atomization treatment process of electric power plant desulfurization wastewater. According to the process, desulfurization wastewater is conveyed into a pH value adjusting pool; one or a plurality of materials selected from lime, limestone, sodium hydroxide and sodium carbonate are added to the pH value adjusting pool so as to produce partial heavy metal hydroxides and self-flow into a reaction pool; an organic sulfide is added to produce precipitates such as mercury sulfide and copper sulfide, and the precipitates self-flow into a flocculation pool; an iron salt, a polymer flocculant, and a coagulant are added to condense suspended solid particles dispersed in the wastewater and partial COD into the centralized floc; the clear water of the flocculation precipitation pool overflows into a final oxidation neutralization box from the upper portion, an oxidizing agent and a neutralizing agent are poured by using an ultrasonic atomization manner, and the COD in the water is completely oxidized in an atomizing state; and the sludge is subjected to dewatering utilization, and the sewage discharge meets the standard. According to the present invention, the process is simple, and the contaminant removal effect is good.

The invention discloses a macroporous skeleton hydrophobicmercury removal material, a preparation method and application thereof. A simple one-step precipitation method is adopted, a surfactant is used for regulating and controlling the crystal size of metal sulfide, the metal sulfide is fixed on a macroporous skeleton hydrophobic material, and a novel mercury removal material is obtained. The preparation method of the macroporous skeleton hydrophobic mercury removal material is simple, the contact area of metal sulfide minerals and mercury is increased, and the resistance of an adsorbent to flue gas is reduced. The macroporous framework hydrophobic mercury removal material has extremely high mercury adsorption capacity and adsorption rate, the hydrophobic performance of pure metal sulfide is improved, and the obtained mercury removal material can be used as a mercury removal medium to be applied to a fixed bed or a liquid phase (such as a wet dust removal device) to be in contact with gaseous elemental mercury; and volatile gaseous elemental mercury is converted into stable solid mercuric sulfide, and the material has the advantages of being flexible in application, high in efficiency, environmentally friendly and the like.

A process for immobilizing mercury by producing crystalline mercury sulfide for subsequent disposal of the mercury sulfide, the mercury sulfide being formed by the reaction of elemental mercury and an additive material of elemental sulfur or a sulfur compound. The reaction of the mercury and of the additive material takes place at least during one time interval at a temperature above the melting point of the additive material.

The invention discloses a standard sample for rapid screening and analysis of lead, cadmium, chromium, mercury and bromine in PP for X-ray fluorescence analysis of RoHS detection and a preparation method thereof. The standard sample is mainly prepared by the steps of: mixing the following raw materials including polypropylene, a diffusing agent, an antioxidant, toner, an antistatic agent and a target compound, then repeatedly melting, extruding and granulating to prepare round piece-shaped PP plastic. The standard sample prepared by the invention and a sample to be detected have similar chemical composition and physical structure, and a target element is uniformly distributed and has certain-concentration gradient distribution, so that the accuracy and the reliability of analysis data canbe ensured and the production efficiency is high; by adoption of a mode with repeated melting, extrusion and granulation, the former 1/3 extruded materials do not need to be discarded, so that the material waste and environmental pollution can be reduced; the formula provided by the invention can meet multiple repeated melting and extrusion without ageing. By adoption of mercury sulfide, the problem that the content of mercury can not be taken on according to an expected design and the mercury pollution can be caused due to loss of mercury element in the process of heating processing can be solved.

The invention provides a method for preparing mercuric sulfide (HgS) quantum dots by using mercury-containing wastewater. The method mainly comprises the following steps of: enabling Hg<2+> to react with an organic complexing agent so as to form a mercuric organic complex and transferring the Hg<2+> in a water phase into an oil phase through a phase transfer method; and introducing a sulfur source, and enabling the mercuric organic complex to be combined with the sulfur source so as to produce HgS semiconductor quantum dots respectively through a mixed solvothermal method, a low-temperature stirring method and a high-temperature activation method. According to the method for preparing the HgS quantum dots by using the mercury-containing wastewater, the mercury-containing wastewater can be effectively treated and then can reach the national emission standards (the mercury content is lower than 0.05 mg/L), and the HgS semiconductor quantum dots with a higher application value are synthesized, so that get a double advantage, and the effect of changing waste into valuable is achieved. Moreover, the drugs needed in the method are little in environmental hazard and low in cost, the treatment cost is lowered, and the method for preparing the HgS quantum dots by using the mercury-containing wastewater is especially applicable to the treatment of high-concentration mercury-containing wastewater.

The invention discloses mercury removal agent for treating waste water containing mercury, which is formed by compounding engineering bacillus, inorganic matters and organic aldehyde. The engineering bacillus includes one or two of engineering acidithiobacillus, iron-oxidizing bacteria, mercury removal bacillus and pseudomonas cepacia, the inorganic matters include one or two of sodium chloride, sodium bicarbonate, sodium bisulfate and ferrous sulfate, and the organic aldehyde includes one or two of cyclohexyl formaldehyde, trioxymethylene, O-phthalic aldehyde and p-fluoro benzaldehyde. Undera condition with a pH (potential of hydrogen) value ranging from 6.0 to 8.0, the composite mercury removal agent is added into waste water with mercury concentration ranging from 50mg/L to 1000mg/L, the mass ratio of the fed mercury removal agent to the waste water ranges from 1:100 to 1:500, fermentation is carried out for 24 to 48 hours under an anaerobic condition, mercury in the waste water can be converted into mercury steam, the mercury steam is absorbed by hydrogen sulfide gas to generate precipitated mercuric sulfide, and accordingly the purpose of removing the mercury is achieved.

The invention discloses a quality control method for orthopedics-traumatology coaptation. The method adopts TLC to carry out qualitative identification for notoginseng, borneol, safflower and Nux vomica powder and uses electrophoresis for carrying out qualitative identification for starfish. HPLC and GC are respectively adopted to carry out quantitative identification for strychnine and the borneol. Chemical titration is adopted to carry out quantitative identification for mercury sulfide. Therefore, the quality control scope of the orthopedics-traumatology coaptation is enlarged. The quality control method for orthopedics-traumatology coaptation is easy to be practiced and has strong specialization. In addition, the quantitative identification has high precision and good repeatability, thus ensuring that the quality of compound medicine is uniform, stable, effective and controllable.

The invention provides a flue gas mercury removing method. The flue gas mercury removing method comprises the following steps of performing mercury removal, during which mercury remover reacts with sulfur dioxide inside the flue gas into produce elemental sulfur which is applied to processing mercury contained in the flue gas. The mercury remover reacts with the sulfur dioxide inside the flue gasto produce the high-dispersion and high-activity elemental sulfur, which can effectively react with the sulfur dioxide inside the flue gas into mercury sulfide and accordingly remove the mercury out of a system, and also, unreacted superfluous elemental sulfur can be discharged out of the system along with the mercury sulfide. Therefore, the flue gas mercury removing method can achieve mercury removal of the flue gas, and with the superfluous elemental sulfur, can avoid excessive concentration of hydrogen sulfide and further avoid adverse effects of excessive hydrogen sulfide on a subsequent sulfuric acid system.

The invention discloses a natural sulfide mineral-based material as well as a preparation method and an application thereof. According to the method, a simple one-step anion exchange reaction is employed, and natural metal sulfide minerals are soaked in a Se2-precursor solution to synthesize selenium ion-coated natural sulfide minerals serving as a novel mercury adsorbent; the natural metal sulfide mineral comprises pyrrhotite, pyrite, sphalerite, alabandite, tungstenite and a mixture of the pyrrhotite, pyrite, sphalerite, alabandite and tungstenite. The mercury adsorbent obtained by the invention is used as a mercury removal medium to be in contact with gas-phase elemental mercury in a fixed bed, a fluidized bed or an injection tower, so that the gas-phase elemental mercury is converted into stable mercury sulfide. The preparation method of the natural sulfide mineral-based material is rich in raw material reserve, simple in process and wide in application range; the natural sulfide mineral-based material has extremely high mercury adsorption capacity and adsorption rate, is applied to removal of elemental mercury in a gas phase, and has the advantages of simplicity in operation,high efficiency, environmental friendliness of mercury removal products and the like.

Provided is a method of stabilizing and solidifying elemental mercury using sulfur and paraffin. The method includes reacting elemental mercury with sulfur to prepare a mercury sulfide compound, adding a mixture of the mercury sulfide compound and the remaining sulfur after the reaction to high-temperature liquid paraffin to melt the remaining sulfur, and cooling the sulfur to solidify the mercury sulfide compound. According to the method of stabilizing and solidifying elemental mercury using sulfur and paraffin, a surface of a solidified product is covered with a thin paraffin layer to prevent exposure to the outside.

The invention relates to a method for extracting and separating mercury sulfide nanoparticles in a Mongolian medicine Menggenwusu, belonging to the field of active ingredient extraction of a traditional processed product of a Mongolian medicine. The method comprises extraction of mercury sulfide sample particles and differential separation of mercury sulfide micro-nanoparticles, wherein in the extraction, the mercury sulfide sample particles are extracted by xylene, and elemental sulfur in Menggenwusu is removed; and in the differential separation, the mercury sulfide micro-nanoparticles different in particle size can be obtained by controlling the PVP concentration, feed ratio, centrifuge speed and centrifugation time. By adopting the method provided by the invention, the extracted mercury sulfide micro-nanoparticles have high purity, stable composition and exact structure while clinical administration is more scientific; and moreover, with the separated mercury sulfide micro-nanoparticles different in particle size, the efficacy of the nanoparticles different in particle size can be compared.

The invention discloses a method for treating mercury-containing hazardous waste slag by combining low-temperature thermal desorption with chemical leaching. The method comprises the steps that firstly, low-temperature thermal desorption treatment is conducted on the mercury-containing hazardous waste slag to remove organic combined-form mercury and part of low-boiling-point inorganic combined-form mercury in the mercury-containing hazardous waste slag; secondly, leaching is conducted by adopting mixed liquid containing organic acid, iodate and chlorine salt to remove high-boiling-point mercuric oxide-form mercury; and lastly, leaching is conducted by adopting mixed liquid containing sodium sulfide and sodium hydroxide to remove high-boiling-point mercuric sulfide-form mercury. According to the method, multi-form mercury in the mercury-containing hazardous waste slag can be efficiently removed, the mercury residue content is low, the mercury-containing hazardous waste slag can be changed into general waste, the hazardous waste treatment cost is greatly reduced, and the condition that secondary pollution is caused to the environment is avoided.

The invention relates to the technical field of treatment agents for mercury-containing waste residues, and in particular relates to a lime sulfur agent for treating the mercury-containing waste residues and a preparation method thereof. The preparation method comprises the following steps: appropriately proportioning quick lime, sulfur powder, water and sodium salt, combining with a preparation process of the lime sulfur agent, and controlling process parameters in process steps to ensure that a relatively optimal structure morphology can be formed among quick lime, the sulfur powder, the water and the sodium salt, so that the performance of the lime sulfur agent can be improved to a highest extent, a transformation capacity of the lime sulfur agent on elemental mercury or mercury salt can be improved, and the recovery rate of recycling mercury from the mercury-containing waste residues can be promoted; and moreover, combining with the control of addition sequences of quick lime, the water, the sulfur powder and the sodium salt to ensure that the structure performance of the lime sulfur agent is relatively excellent, the lime sulfur agent and elemental mercury or the mercury salt can be converted to the highest extent, mercury sulfide complex ions can be formed, and the development of the comprehensive utilization and mercury recycling industries of the mercury-containing waste residues can be promoted.