220 results about "Heavy metal compound" patented technology

The invention relates to a processing method of stainless steel pickling waste liquid, which is characterized in that the processing method includes the steps that: neutral salt wastewater flows into a neutral reduction cell, and mixed acid pickling waste waters flow into a neutralizing tank; reducing agent is added into the neutral reduction cell, and then the reduced wastewater liquid is put into the neutralizing tank and is mixed with the adjusted mixed acid pickling waste waters, and liquid alkali is added into the neutralizing tank; the separated clear waste liquid removes fluorin ions in a settlement tank; neutralizing liquid is added into a final neutralizing tank to cause the pH value of treatment liquid to adjust to be neutralized wastewater liquid which passes through a sand filter to be discharged. The processing method has the advantages that metal ions and fluorin ions are performed the subsection treatment, and neutralizing agent is changed into the liquid alkali from lime cream, the requirement of reaching the standard of the waste liquid emission is not only achieved, but also the mud quantity produced by a mass of lime cream is greatly reduced, heavy metal mud of a retention pond only contains heavy metal compound, the salts of calcium fluoride and calcium sulphate, etc. are separated from the inclined plate settlement tank during the fluoridation stage, thereby the treatment cost is effectively lowered.

An electrodynamic method for repairing the soil polluted by heavy metal includes using ion exchange film to isolate cathode from said soil, inserting porous ceramic between said film and soil, controlling the pH value of soil by the H and OH ions generated by electrodes themsolves for speeding up the extraction of pollutants, depositing heavy metals in cathode solution, centrifugal purifying to obtain heavy metal compound, and using clean cathode solution to neutralizing soil.

The invention relates to an overall treatment method of steel works sintering dust, which is characterized by comprising the following steps: carrying out stage treatment on electrically precipitated dust in a sintering head, conveying the electrically precipitated dust produced in a primary electric field directly to a sintering field (a stock yard or a material distribution room) for material application in case of sintering; mixing the electrically precipitated dust produced in a subsequent electric field and then carrying out stirring pulping, gradient magnetic separation, carbon selection by flotation and solid-liquid separation; when the solid-liquid separation is finished, using the obtained potassium solution for producing potassic fertilizer and extracting lead product from the obtained tailing slurry.The method of the invention has the advantages that different process routes are adopted to effectively recover and comprehensively utilize contained multiple valuable resources such as ferrum, carbon, potassium, lead and the like according to different contents of alkali metal such as potassium and sodium and heavy metal compounds such as lead, zinc and copper in different electric field precipitated dust in a sintering head electric precipitator.

The invention relates to the method of a kind of using synergizing lawn plant to restore the heavy metal compound pollution in city life waste compost. In the period from seeding to mowing of grasses on lawn, fertilize EDTA into the waste compost base substance as per 5 - 30 mmol/kg; through fertilize EDTA, increase the extracting effect of lawn grasses to heavy metal in city life waste compost base substance, to make the effect of lawn glasses corresponding to the effect of heavy metal super-enriching plant. The application of the invention can not only rebuild waste compost industry, and realize the effective resource use of waste compost, but also provide scientific basis for complexing restoration of lawn grasses to heavy metal pollution area.

The invention discloses a waste water processing method during a heavy metal compound production process, and specifically relates to a waste water processing method during a lithium ion battery cathode material producing process. According to the invention, a precipitating agent and a flocculating agent are added into heavy metal compound production waste water; the mixture is filtered and separated, such that heavy metal precipitate and a high-concentration salt solution are obtained; the high-concentration salt solution is processed through multiple-effect evaporation, condensation, and separation, such that inorganic salt crystals can be obtained; and residue waste water can be discharged into a city sewage processing system. With the method, heavy metal ions can be effectively precipitated and recovered, and ammonia nitrogen and other high-concentration salt ions can be removed and recovered. The method is simple, and the cost is low. With the method, waste water can satisfy a standard for being discharged into the city sewage processing system.

A kit is provided based on two pastes designed to produce bone cement with high initial stability and therefore low post-cure. The kit includes a paste A and a paste B, wherein paste A contains (a1) a polymerizable monomer having a pH in water in the range of 5-9, (a2) a filling agent insoluble in (a1), and (a3) a barbituric acid derivative selected from the group consisting of 1,5-disubstituted barbiturates, 1,3,5-trisubstituted barbiturates, and 1,3,5-tetrasubstituted barbiturates, and paste B contains (b1) a polymerizable monomer having a pH in water in the range of 5-9, (b2) a filling agent insoluble in (b1), (b3) a peroxide soluble in (b1), (b4) a heavy metal compound insoluble in (b1) and selected from the group consisting of heavy metal salts and heavy metal complexes, and wherein at least one of the pastes A and B contains a halide salt.

A mercapto polyaspartic acid-chitosan copolymer used for adsorbing heavy metal, chlorohydrocarbon, organic pigment, dyeing, etc is prepared from cross-linking reaction between polyaspartic acid with amino side chain and chitosan in acidic aqueous solution, and reacting on mercapto carboxylic acid.

The invention provides a method suitable for recycling waste liquor in a tin removing procedure of a circuit board industry, and the method is suitable for the recycling of tin removal waste liquor which takes nitric acid as a main component and contains heavy metal compounds, such asnamely tin, copper, and the like. The method comprises the following steps of: treating heavy metals contained in the tin removal waste liquor by adopting a complexing precipitation method, and depositing metal ions contained in the tin removal waste liquor. According to the invention, after the tin removal waste liquor is subjected to solid-liquid separation, metal resources, such asnamely the tin, the copper, and the like, can be recovered from deposits; clear liquor and new tin removal liquor are similar in component and are recycled in the tin removing procedure after being appropriately regulated, so that the purpose of recycling of the tin removal waste liquor is realized. The method provided by the invention can realize the recycling of the tin removal waste liquor, can be used for efficiently recovering the metal resources contained in the waste liquor, has the advantages of simple process, small equipment investment, low energy consumption and no waste water and waste gas discharge in an operating process and realizes the clean production of the tin removing procedure.

An object of the present invention is to provide an extreme ultraviolet light source target which can emits extreme ultraviolet light with high emission efficiency. A solid target made of heavy metal or heavy-metal compound and having a density 0.5 to 80% that of the crystal density is used. When the target is irradiated with a laser beam, plasma of the heavy metal contained in the target is generated, and extreme ultraviolet light having a predetermined wavelength which corresponds to the kind of the heavy metal is emitted from the plasma. When the density of the target is made to be smaller than the crystal density as described above, space distribution of the density of the generated plasma can be controlled, and the region in which plasma absorbs energy of the laser beam overlaps the region in which the plasma emits the extreme ultraviolet light. Thus, emission efficiency can be improved, preventing energy loss. For example, in a case where the SnO₂ target having a density 24% of the crystal density is used, the emission efficiency at around 13.5 nm wavelength is higher than in the case where a Sn crystal target is used.

A crosslinked acrylic fiber which has high saturated moisture absorption and which slowly absorbs moisture and is excellent in the persistence of hygroscopically heat-generating performance. Namely, a slowly moisture-absorbing and -releasing crosslinked acrylic fiber which is a moisture-absorbing and -releasing crosslinked acrylic fiber having a crosslinked structure and salt-type carboxyl groups and characterized by satisfying the following relationships (1) to (3): a (%) <u.

The invention relates to application of osthole, and particularly provides application of osthole in the preparation of a marine antifouling paint. The molecular formula of the osthole is C15H16O3, the molecular weight is 244.29, and the chemical name is 7-methoxyl-8-isopentenyl coumarin. The osthole has obvious inhibiting effects on marine micro fouling organisms, marine macro soft fouling organisms and marine macro hard fouling organisms, indicates high-efficiency and broad-spectrum antifouling activities, and is widely applied to the preparation of the marine antifouling paint. Because the osthole is a natural compound, the marine antifouling composition prepared from the osthole does not contain toxic heavy metal compounds and can not pollute the environment. The osthole extraction and preparation process is simple and mature, thereby being beneficial to the popularization and application of the osthole in the preparation of the marine antifouling paint.

The invention discloses a chemical elution-plant combined remediation method of polybrominated diphenyl ether and heavy metal compound contaminated soil. Firstly, contaminated soil particles are crushed and screened; then, the soil particles are put in soil multiple ectopic remediation equipment, mixed eluant is added, and a ultrasonic reinforcement and heating treatment mode is adopted to perform the continuous ectopic synergy elution; glyptostrobus pensilis is inoculated in the eluted soil, nutrient source buffer solution being 15-30 mass% of the soil is applied; and the remediation is finished through manual cultivation growth. The method can synchronously and efficiently elute polybrominated diphenyl ether and multiple heavy metals in the soil; and the inoculation of the glyptostrobus pensilis and the addition of external source nutrient substances facilitate deep degradation of the residual polybrominated diphenyl ether after the elution of the soil, and facilitate the recovery of ecological function diversity and stability of polluted soil environmental microorganisms.

The invention discloses a heavy metal compound contaminated soil remediating compound eluant and a using method thereof. The compound eluent is obtained by compounding two common eluants, namely 0.08mol/L of ethylenediaminetetraacetic acid (EDTA) and 0.4mol/L of citric acid (CA), according to a volume ratio of 1:1, and adjusting pH to 4.0 by using 0.1mol/L of NaOH. The compound eluent has relatively high efficiency of removing heavy metals in heavy metal compound contaminated soil, and the used compound eluent is simple in preparation method, low in cost and strong in practicality; in addition, eluting wastewater can be recycled after being treated, so that the pollution to the environment is reduced.

The invention discloses healthy interior wall coating with zero VOC. The healthy interior wall coating with zero VOC is processed and prepared through a plurality of working procedures such as taking deionized water, titanium dioxide, emulsion, ultra-fine calcium carbonate and ultra-fine talcum powder as the main raw materials and adding dispersing agent, flow agent, thickening agent, anti-mildew agent, film-forming agent and anti-foaming agent as the special auxiliary agent. The invention also discloses a preparation method of the zero-VOC healthy interior wall coating, because the coating adopts a clean production technology, during the process of production and construction, the coating has low-volatile organic matter content, the indexes of soluble heavy metal and the ecological toxicity are lower than the national standard, and the content of the volatile organic matter (VOC) is zero. The heavy metal compound is less than 500 mg/kg, the content of the polymer of formaldehyde and formaldehyde is less than 500 mg/kg, the coating has no environmental pollution and no harm to the human body, and the obvious effects of environmental protection and antibiosis are realized. The healthy interior wall coating with zero VOC has the advantages of good tank opening performance, leveling property of coating, strong coverage rate, washing resistant performance, fading resistance, alkali resistance, mold fungus resistance, asepsis and tasteless.

The invention relates to a stabilizer for heavy metal compound contaminated soil and a preparation method of the stabilizer for heavy metal compound contaminated soil. The stabilizer comprises sulfide, shell powder and red mud, wherein the molar ratio of the sulfide to effective-state gross of heavy metals lead, zinc and cadmium is 1.5 to 6; the molar ratio of the shell powder to the effective-state gross of heavy metals lead, zinc and cadmium is 1-4; and the red mud is added in a molar ratio of the content of iron in the red mud to the effective-state content of arsenic in soil of 2-8. The preparation method of the stabilizer comprises the following steps: drying the red mud by airing, grinding and sieving the dried red mud; then, cleaning the shell powder, grinding and sieving after drying by air; and preparing the sulfide into an aqueous solution, thereby obtaining the stabilizer. Based on the effective-state content of the heavy metals in the soil, the content of each component is reasonably prepared, so that the stabilizer can be applicable to compound contaminated soil with high leaching concentration, can be used for effectively reducing the leaching concentration of heavy metals in the soil and overcoming the defect of poor stabilization effects of the existing medicament, and has a certain application value.

The invention relates to a method for preparing water-soluble polyester based on an aluminum compound as a catalyst. The method comprises the following steps of: firstly, carrying out esterification reaction on terephthalic acid and glycol in a certain molar ratio; and after the esterification reaction is finished, carrying out condensation reaction by adding an ion type structure unit such as sodium dimethyl isophthalate-5-sulfonate or sodium bis(hydroxyl ethyl) isophthalate-5-sulfonate as a third monomer and polyethylene glycol as a fourth monomer and then adding the aluminum compound as the catalyst so as to finally obtain the water-soluble polyester. In the preparation method provided by the invention, a heavy metal compound such as an antimony compound is not used as the catalyst, so as to reduce the pollution of water quality and be beneficial to environment conservation; and the price of the catalyst is low, and the prepared water-soluble polyester can be used for producing sea-island filaments and the like.

The invention discloses an anti-neutron radiation polyester fiber preparation method. According to a specific embodiment, the preparation method comprises the following steps: mixing 52%-76% of terephthalic acid, 23%-48% of ethylene glycol, boride or a heavy metal compound, which is mixed into ethylene glycol and the weight of which accounts for the total weight of ethylene glycol by 16%-25%, 0.5%-5% of a catalyst and 0.3%-2% of a stabilizer in percentage by mass in a reaction kettle, reacting under a condition of 245-260 DEG C for 30-50min, and obtaining a copolymer melt on a polycondensation section under conditions of 260-290 DEG C and a vacuum degree of 0.1-10KPa; extruding the copolymer melt once on a screw extruder and drying to obtain an anti-neutron radiation terylene chip; and processing the chip by the screw extruder, a pre-filter, a static mixer, a metering pump and a spinning component, spinning, quenching air and applying oil, processing by a chimney, coiling, etc. to obtain an anti-neutron radiation polyester fiber. The preparation method disclosed by the invention has the beneficial effects that terylene, which serves as a carrier, is copolymerized with the heavy metal compound, and the terylene fiber not only has an anti-radiation function, but also integrates various features of the terylene.