7 results about "Mercuric sulphide" patented technology

The present invention discloses a method for removing impurities from waste acid and fully recycling the waste acid. The method comprises the following steps: introducing hydrogen sulfide into the waste acid for a sulfidation reaction, removing arsenic sulfide and mercuric sulfide precipitates formed during the reaction; continuing to introduce hydrogen sulfide for a step-by-step sulfidation reaction, adding an iron-containing substance to adjust the reaction pH and ORP, and recovering the copper, lead, and zinc sulfide slag precipitates formed during the reaction in a step-by-step manner; adding an iron-containing substance for a neutralization reaction, controlling the pH and ORP, promoting the reaction between iron ions and arsenate, and removing the ferric arsenate precipitate formed during the reaction; adding an adsorbent for an adsorption reaction, and removing fluorine-containing and thallium-containing components by adsorption; introducing an oxidant for an oxidative hydrolysis reaction, controlling the degree of hydrolysis, and preparing polyferric sulfate. The present invention utilizes the iron-containing substance to remove impurities from waste acid, thereby achieving deep impurity removal and full resource utilization of waste acid.

This invention discloses an integrated device and method for mercury vapor recovery and waste gas purification in amalgam brazing, belonging to the field of electronic packaging brazing and hazardous gas treatment. The device comprises a brazing sealing enclosure, a condensation unit, an iodine solution absorption unit, a sulfur absorption unit, a zinc powder absorption unit, and a safety monitoring module, connected in series. During brazing, mercury-containing waste gas is collected by the enclosure and first enters the condensation unit for pre-cooling and recovery of liquid mercury; then it enters the iodine solution absorption unit, where it reacts with iodine to generate mercuric iodide precipitate and capture silver dust; next, the residual mercury is fixed as mercuric sulfide by the sulfur absorption unit; finally, trace mercury is adsorbed by the zinc powder absorption unit. The purified waste gas is monitored in real time by a mercury concentration sensor; if the concentration exceeds the standard, an alarm is triggered and the heating platform is automatically shut down. This invention achieves a mercury removal rate of over 99.5% through four-stage synergistic purification, with emission concentrations lower than the national standard of 0.01 mg / m³. 3 It has advantages such as high purification efficiency, safety and reliability, good material compatibility, and convenient maintenance.

The invention discloses a flue gas demercuration method and system based on metal sulfide slurry atomization spraying. The method comprises the following steps: mixing a solution containing metal salt and a surfactant with a sulfur source solution capable of generating sulfur ions, and carrying out precipitation reaction to obtain metal sulfide slurry; and the metal sulfide slurry is atomized and sprayed into a mercury-containing flue gas pipeline to convert a mercury source into mercuric sulfide. According to the method, the metal sulfide synthesized in situ through the on-site liquid phase is small in particle size, large in specific surface area, high in dispersity and high in stability, polymorphic mercury in the cement kiln flue gas can be effectively converted into stable mercuric sulfide, efficient removal of the polymorphic mercury is achieved, meanwhile, the problems of powder agglomeration and carbon residues are avoided, the preparation and operation cost is reduced, and the method is suitable for industrial production. The system stability is improved.

The utility model belongs to the technical field of medical treatment, and discloses a medical mercury leakage treatment device which comprises a gun barrel, a connecting rod is fixedly installed on the left side of the bottom of the gun barrel, a bottom ball head of the connecting rod is connected with a sealing cover, the bottom of the sealing cover is in threaded connection with a recycling barrel, and the two sides of the top of the sealing cover are fixedly connected with a soft suction pipe and a soft air pipe correspondingly. A medical worker presses a button, at the moment, the button compresses an air bag disc through a sliding column, air in the air bag disc is sent to an air bag ring at the bottom of a sliding plate through a connecting pipe, and then the air bag ring expands to jack up the sliding plate to drive an extrusion block to move upwards; at the moment, the rubber tube loses abutting of the extrusion block, sealing is relieved, the rubber tube is communicated with the suction nozzle at the left end, the recycling barrel with the interior in a negative pressure state generates suction force through the suction nozzle, mercury is sucked into the recycling barrel and mixed with sulfur powder in the recycling barrel to react, mercuric sulfide is generated, and therefore harm to medical workers and patients is relieved.

The invention relates to the field of hazardous waste treatment, in particular to a method for safely treating scrapped elemental mercury, which comprises the following steps: (1) oxidizing elemental mercury; (2) dissolving mercury oxide; (3) neutralization reaction; (4) mercury salt precipitation; (5) solidification and landfill of filter residues; evaporating and crystallizing filtrate to produce sodium chloride. According to the scheme, the sodium hypochlorite is used for oxidizing the mercury elementary substance to generate the basic mercuric chloride, then the basic mercuric chloride is acidified by hydrochloric acid to form the mercuric chloride solution, then sodium sulfide is added under the alkaline condition to form the mercuric sulfide precipitate, and the safe treatment of the mercury elementary substance is realized through a series of post-treatments such as solid-liquid separation and solidification. And finally, the generated filtrate is evaporated and crystallized to prepare sodium chloride, so that recycling of waste salt is realized, and zero emission of waste is realized. Compared with the prior art, the disposal method is lower in cost, and the disposal process is safer and more environmentally friendly.

The invention discloses a method for efficiently separating mercuric sulfide nanoparticles and mercury ions, and belongs to the technical field of adsorption materials. The method comprises the following steps: injecting aqueous dispersion mixed with mercuric sulfide nanoparticles (HgS NPs) and mercury ions (Hg < 2 + >) into a filter head, and filtering through a microporous filter membrane; enabling the HgS NPs to be intercepted on the filter membrane; the Hg < 2 + > passes through the microfiltration membrane to realize filtration; wherein the average particle size of the HgS NPs is less than 10nm; the microporous filter membrane is a nylon microporous filter membrane with the pore diameter of 0.22-0.45 [mu] m, and / or the microporous filter membrane is a nylon microporous filter membrane; the microporous filter membrane is a microporous filter membrane made of a polyvinylidene fluoride material, and the pore diameter of the microporous filter membrane is 0.22-0.45 mu m. According to the invention, efficient separation of HgS NPs and Hg < 2 + > can be realized, and especially separation of mercuric sulfide nanoparticles with a particle size of less than 10nm and mercury ions can be realized.

The invention relates to the technical field of plant extracts and mineral extracts, and particularly discloses a sleep promoting composition for balancing a magnetic field and a microenvironment and a preparation and use method thereof.The sleep promoting composition is prepared from, by weight, 10-30 parts of plant powder, 0.5-1.7 parts of mercuric sulfide and 2-8 parts of a bonding matrix; wherein the plant powder comprises at least one of a component A for promoting dopamine secretion, a component B with an aromatic curative effect and a component C with a sedative effect; the adhesive matrix contains a silicate. Natural plants and minerals are adopted, the mind tranquilizing and sleep promoting effects provided by the plants and the improvement of the minerals on a micro magnetic field of a sleep environment are utilized, the traditional Chinese medicine does not need to be taken and is not close to the skin, sleep disorders are effectively improved, and drug dependence is reduced.