167 results about "Sodium diethyldithiocarbamate" patented technology

The invention discloses a Cu3BiS3 ternary sulfur nano material and a preparation method thereof, belonging to the field of inorganic nano materials. The Cu3BiS3 ternary sulfur nano material is nano particles which are prepared by adopting a high-temperature pyrolysis method by taking oleic acid, oleylamine and octadecene as reaction solvents, Cu(NO3)2.3H2O and Bi(NO3)3.5H2O as raw materials and sodium diethyldithiocarbamate as a complexing agent and a sulfur source. The Cu3BiS3 nano particles have better absorbability in an ultraviolet/visible light area, and are proved to have a good photo-thermal effect; besides, the Cu3BiS3 ternary sulfur nano particles can be used for performing CT (computed tomography) imaging, so that the nano particles can be well applied in the field of biomedicine. Moreover, the preparation method of the Cu3BiS3 ternary sulfur nano material has many advantages of simple operation, low raw material cost, availability and the like, and is suitable for industrial production and application.

The invention relates to a reagent formula used for a zinc leaching residue floatation process and an application method of the reagent formula. The reagent is a floatation reagent which is added into floatation processes such as sulfurizing, rough floatation, scavenging and concentration. The reagent formula is characterized in that 1) one or two of sodium sulphide and sodium hydrosulfide are added into a sulfurizing process as a sulfurizing reagent; 2) in the rough floatation process, N,N-sodium diethyldithiocarbamate, butyl ammonium black powder and 25# black powder are added as lead mineral collecting agents, Y89 and (or) pentyl xanthate are added as silver mineral collecting agent(s); 3) in a scavenging process, one or two of sodium sulphide and sodium hydrosulfide are added as the sulfutizing agent(s), N,N-sodium diethyldithiocarbamate, butyl ammonium black powder and 25# black powder are added as the lead mineral collecting agents, and the Y89 and (or) pentyl xanthate are added as the silver mineral collecting agent(s); and 4) carboxymethylcellulose is added as a gangue inhibiting agent in a concentration process. After applying the reagent formula disclosed by the invention, by adopting one-time rougher floatation, one-time scavenging and one-time concentration, lead yield can reach up to more than 95% and lead tail run can reach 0.1-0.2%.

A pasted positive nickel hydroxide electrode for use in battery cells (e.g., in nickel zinc cells, and nickel metal hydride cells) includes nickel hydroxide particles, a cobalt metal and/or cobalt compound and a sulfur-containing complexing agent capable of forming a complex with cobalt. The presence of the sulfur-containing complexing agent, such as dialkyldithiocarbamate (e.g., sodium diethyldithiocarbamate) improves lifetime and capacity utilization of the nickel electrode. The resulting pasted nickel hydroxide electrode includes a CoOOH conductive matrix after formation. The surface of the nickel hydroxide particles in the electrode is modified in some embodiments by providing a cobalt-containing coating onto the surface of the nickel hydroxide particles, followed by oxidation with a strong oxidizing agent. The complexing agent can be added before, after, or during the oxidation.

The invention discloses SiO2/MoS2 core-shell-structure microspheres and a preparation method thereof. The method comprises the following steps: dissolving tetraethoxyl silicion and triethanolamine (or diethanolamine or ethylenediamine or 2-amino-2-methyl-1-propanol) in anhydrous ethanol, dropwisely adding distilled water, and carrying out hydrolysis reaction under certain conditions to prepare SiO2 microspheres; and dispersing the obtained SiO2 microspheres in a water solution containing ammonium molybdate, polyvinylpyrrolidone (K30) and sodium diethyldithiocarbamate, and carrying out hydrothermal reaction in a high-pressure autoclave to obtain the SiO2/MoS2 core-shell microspheres. The SiO2 microspheres prepared by the method have uniform size; and the composite SiO2/MoS2 core-shell microspheres have the advantages of uniform shape and size and favorable dispersity, and can be used for a lubricating oil additive to improve the lubricating conditions.

A method for integrated treatment of electroplating wastewater includes steps of: adjusting and maintaining pH of wastewater at 10.5-12; oxidizing pollutants such as sodium cyanide and hydroxyl-containing organic amine complexants with sodium hypochlorite; precipitating carboxyl-containing organic acid complexants with synergistic effect of ferrous and calcium ions; reducing hexavalent chromium to trivalent chromium and forming chromium hydroxide precipitate; removing precipitate by filtering; adjusting wastewater to pH of 4.5-5.5; precipitating heavy metal ions with sodium dimethyldithiocarbamate or sodium diethyldithiocarbamate; adsorbing precipitate and heavy metal capturing agents with activated carbon; filtering to remove precipitate; adjusting wastewater to pH of 6-8; and destroying aliphatic polyamine complexants and reducing COD using an available biological degradation technique. This method can effectively and economically remove the pollutants such as heavy metals in the electroplating wastewater for a good market prospective.

The invention discloses a masking-agent-containing test strip for detecting the content of cadmium in a Chinese herbal medicine. The test strip comprises a loading substrate, a glass fiber layer, a reaction substrate and a supporting substrate which are sequentially overlapped on one another, wherein the loading substrate is provided with a test hole and a contrast hole, the glass fiber layer contains a masking agent, the reaction substrate contains a cadmium color developing agent, and the supporting substrate is provided with two observation holes, and the two observation holes respectively correspond to the test hole and the contrast hole; the masking agent is the combination of two or more than two formulae in the following five formulae: a formula I including hydroxylamine hydrochloride and glycine; a formula II including sodium thiosulfate and sodium citrate; a formula III including thiourea and sodium pyrophosphate; a formula IV including sodium potassium tartrate tetrahydrate and thiourea; and a formula V including diethyl dithiocarbamate and phenanthroline. The test strip disclosed by the invention is convenient to carry, is simple to operate, low in cost, high in detection sensitivity and specificity and wide in application range and can realize the rapid spot detection on the heavy metal cadmium in the Chinese herbal medicine.

The invention discloses a method for treating an alkaline zinc-nickel alloy electroplating waste water. The method comprises the following steps: adjusting the pH of the alkaline zinc-nickel alloy electroplating waste water to be 3-4, adding an aqueous solution of sodium diethyldithiocarbamate for precipitating zinc and nickel, and adding a flocculating agent to make precipitation particles aggregated; adjusting the pH of the electroplating waste water to be 4.5-5.5, and adding a sodium hypochlorite solution; and adjusting the pH of the treated electroplating waste water to be 6-9 to obtain required matter. The treatment method for the alkaline zinc-nickel alloy electroplating waste water provided by the invention can completely precipitate zinc and nickel ions with the sodium diethyldithiocarbamate through controlling the pH of the waste water in a sedimentation tank to be 4.5-5.5; and hydrogen peroxide does not need to be added to destroy aliphatic polyamine strong complexing agentsin the waste water, so that the treatment process is simplified, and the treatment process can interface with current electroplating waste water treatment equipment, solves the difficulty in the treatment of the alkaline zinc-nickel alloy electroplating waste water, and has better market application prospects.

The invention discloses a CeO2 (Cerium Oxide) nano-particle/CdS (Cadmium Sulfide) nano-rod composite photo-catalyst as well as a preparation method and an application thereof. The CeO2 nano-particle/CdS nanorod composite photo-catalyst takes a CdS nano-rod of a one-dimensional structure as a substrate, CeO2 nano-particles are decorated on the surface of the CdS nano-rod. The preparation method comprises the steps of enabling sodium diethyldithiocarbamate and CdCl2.2.5H2O (Cadmium Chloride) to react to obtain cadmium diethyldithiocarbamate; then, adding a solvent to carry out solvothermal reaction to obtain the CdS nano-rod; ultrasonically dispersing the CdS nano-rod and the Ce(NO3)3.6H2O (Cerium(III) Nitrate Hexahydrate) in absolute ethyl alcohol to obtain a suspension; and dripping deionized water into the suspension to carry out solvothermal reaction by dropping. The CeO2 nano particle/CdS nanorod composite photo-catalyst provided by the invention has the advantages of high catalytic efficiency, strong resistance to corrosion, low cost and the like, thereby being applicable to dye degradation.

The invention provides a preparation method of a multifunctional probe for tumor thermotherapy as a magnetic resonance imaging contrast agent. The preparation method of the multifunctional probe comprises the following steps: dropwise adding the solution of sodium diethyldithiocarbamate of water into the solution of a copper compound in water, stirring to obtain a blackish brown precipitate which is diethyl dithio amino copper, and drying the precipitate in vacuum; adding a diethyl dithio amino copper containing solution of oleylamine into hot oleylamine, introducing nitrogen into the mixture, heating the mixture, stirring, cooling to room temperature, washing, centrifuging, dispersing into a stabilizer, and evaporating in a rotating way; adding a surfactant, stirring, and filtering to obtain a transparent blackish green solution; adding ethanol into the blackish green solution, oscillating ultrasonically, stirring, adding an alkali, a silicon source and a magnetic compound, and stirring to form nanoparticles in core-shell structures. The probe heats tissues by adopting the heat effect generated in the tissues of a human body by a variety of physical energy such as microwaves, radio frequency and ultrasonic waves to accelerate the death of tumour cells, and the probe can be used as the magnetic resonance imaging contrast agent.

The invention discloses a method for determining the content of cadmium in soil by ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry). The method adopts an extraction-reextraction system to deal with a soil sample digested by mixed acid and solves the problem of shifting of the cadmium spectral absorption peak, caused by concentration of cadmium in low-cadmium soil digestion solution and soil matrix. The method comprises the steps of enabling cadmium ions in the digestion solution and sodium diethyldithiocarbamatre to form a chelate in mediums with certain pH value, then performing extraction separation by CCl4 organic phase, adding with nitric acid-hydrogen peroxide mixed solution to oxidize and destroy the chelate, performing reextraction to cadmium in water phase and determining the content of cadmium; experimental results show that the method is simple and feasible, has high precision and good accuracy, can determine low cadmium content of the soil, can make up the blank that the ICP-AES cannot accurately determine the cadmium content in the soil and provides new reference for detection analysis of the cadmium content of the soil.

The invention discloses a preparation method for modified sepiolite and an application of the sepiolite in environmental restoration. The preparation method for the modified sepiolite comprises the following steps of (1) enabling natural sepiolite and deionized water to be mixed at a mass ratio of 1 to (10-50), stirring to form a sepiolite turbid liquid, and standing for 6-24h; (2) adding sodium diethyldithiocarbamate into the solution obtained in the step (1) and stirring, wherein the mass ratio of sodium diethyldithiocarbamate to sepiolite is (0.05-0.3) to 1; and (3) performing solid-liquid separation on the stirred solution, washing the solid body by deionized water, and drying and grinding to obtain the modified sepiolite.

The invention discloses a method for detecting trace copper in wastewater rapidly. The method comprises the steps of: firstly, reacting copper and sodium diethyldithiocarbamate trihydrate (DDTC-Na), separating and enriching Cu-DDTC complexes in a sample by using dispersive liquid liquid microextraction (DLLME) to form yellow complexes which are enriched at a lower part of an ionic tube, comparing a standard copper content, detecting the trace copper in the sample, wherein the detection limit is 5 mu g/L. The method disclosed by the invention is simple to operate, high in detection sensitivity, easy for observation due to the colorless complexing agent (DDTC) and short in detection time, can be used for determining the trace copper without complex equipment, is a simple, convenient, rapid and accurate analysis method, and has a broad application prospect.

The invention belongs to the field of wastewater treatment, and concretely to a method for treating potassium chloride cyanide-free cadmium plating wastewater. The method comprises the following steps: S1, adjusting the pH value of the wastewater, and adding an aqueous solution of sodium pyrosulfite; S2, adding an aqueous solution of sodium diethyldithiocarbamate, and adjusting the pH value of thewastewater; S3, adding a flocculant to make precipitated particles aggregate, and separating the precipitated particles from the wastewater; S4, adding hydrogen peroxide to the wastewater; and S5, adjusting the pH value of the wastewater treated in step S4. The method significantly reduces the content of cadmium and chromium in the potassium chloride cyanide-free cadmium plating wastewater to make the wastewater discharge meet the requirements of national standards, and is suitable for original wastewater treatment and discharge systems in existing electroplating workshops of enterprises.

The invention discloses a treatment method of chemical nickle-plating waste water. The treatment method comprises the following steps: regulating pH of the chemical nickle-plating waste water to 4-6,adding sodium diethyldithioformate to precipitate nickle, adding a flocculating agent to gather precipitated particles, filtering and separating the precipitates; then regulating pH of supernatant liquor to 10-12, and adding hydrogen peroxide for oxidation; for waste water without containing ammonium ions, adding calcium chloride solution; for waste water containing ammonium ions, regulating pH to9-10, adding magnesium chloride solution, then regulating pH of the waste water to 10-12, and then adding the calcium chloride solution; then adding the flocculating agent, separating and filtering to finish treatment. The treatment method of the chemical nickle-plating waste water disclosed by the invention has the beneficial effects that a treatment result meets the requirement of Table 3 in GB21900-2008 Standards for Emission of Electroplating Pollutants, the technical defect of difficult nickel recovery in the traditional one-step precipitation method is overcome, and the obtained nickelprecipitates can be recycled, so that the treatment method has better market application prospect.

The invention relates to lanthanide rare earth ytterbium-doped silver sulfide quantum dots, a preparing method thereof and applications of the quantum dots. The ytterbium-doped silver sulfide quantum dots are prepared by adopting silver sulfide quantum dots as a matrix, and by steps of doping Yb<3+> as an activating ion and growing a heterogeneous sulfur layer on the surfaces of the silver sulfide quantum dots. The chemical formula of the ytterbium-doped silver sulfide quantum dots is Ag2S:Yb<3+>. The preparing method includes 1) reacting sodium diethyldithiocarbamate trihydrate and silver nitrate to obtain a precursor; 2) dissolving the precursor into dodecanethiol, and heating and reacting the mixture to obtain the silver sulfide quantum dots; 3) mixing ytterbium acetate and olaquindox to obtain a ytterbium ion solution; 4) mixing sulfur powder and octadecene to obtain a sulfur solution; and 5) adding the silver sulfide quantum dots, the octadecene and the olaquindox into a reaction container, fully stirring the added materials, adding the ytterbium solution into the reaction container with existence of argon, reacting the mixture, then adding the sulfur solution, and reacting the mixture to obtain the lanthanide rare earth ytterbium-doped silver sulfide quantum dots. The lanthanide rare earth ytterbium-doped silver sulfide quantum dots have good photochemical performance and low toxicity.

The invention relates to a cadmium copper lead polluted bottom mud curing agent. The curing agent is characterized by being composed of alkali materials and heavy metal fixing agents. The alkali materials comprise cement, lime and coal ash; the heavy metal fixing agents comprise monopotassium phosphate or hydroxyapatite and sodium diethyl dithiocarbamate. The invention further relates to a cadmium copper lead polluted bottom mud curing method. The curing method is low in treating cost and can obviously reduce the cadmium copper lead leaching content of bottom mud. Especially, the cadmium copper lead leaching content obtained through an acetic acid buffer method (HJT300-2007) which is a solid waste leaching toxicity leaching method is obviously lower than a limit value of municipal solid waste landfill pollution controlling standard (GB16889-2008).

The invention discloses a modifying method of elastic protein through triggering transmitting terminator, which is characterized by the following: making elastic protein chlorinate through p-chloromethyl benzoyl chloride; sulfurizing diethyl sodium dithiocarbamic acid to make macromolecular triggering transmitting terminator; triggering methyl acroleic acid-beta-hydroxyethyl ester to polymerize irradiated by ultraviolet; synthesizing elastic protein polymer modified by polymethyl acroleic acid-beta-hydroxyethyl ester; modifying the hydrophobicity of elastic protein obviously; reducing heat stability of elastic protein.

The invention relates to a method for preparing high-quality copper indium sulfide by employing a single-source molecular precursor. The method comprises the following steps: mixing copper chloride and indium chloride powder to prepare a solution, and preparing sodium diethyl dithiocarbamate powder into a solution; adding the former solution to the latter solution slowly in the way of stirring, filtering and drying precipitate, putting the obtained product into an autoclave and adding ethanol used as a solvent; sealing the autoclave and then placing the autoclave in an electric dry oven, heating and cooling naturally, washing with deionized water and absolute ethyl alcohol, and finally drying to obtain black copper indium sulfide powder. The invention solves the defaults of a gas phase method and a liquid phase method of expensive equipment, complex process operation, low yield, and the uniformity of the inner and outer composition of the product and the generation of a core-shell structure which are caused by the relatively larger solubility difference of the multi-source precursor in solvent. The invention has the advantages of cheap and easily obtained raw materials, no toxic H2S gas or vacuum environment, and simple process, and can obtain pure tetragonal phase copper indium sulfide with sea urchin-like morphology and high degree of crystallinity.

The invention relates to a recycling agent for recycling a heavy-metal polluted soil leaching waste liquid. The recycling agent consists of a heavy-metal trapping agent and a carrier, wherein the massratio of the heavy-metal trapping agent to the carrier is (0.1-0.2):1. The carrier is montmorillonite or zeolite, and the heavy-metal trapping agent is sodium diethyldithiocarbamate. The recycling agent provided by the invention has the advantages that the recycling of the chemical leaching waste liquid can be realized, the recycling and reuse operation is simple, the cost is low, and the methodis suitable for popularization and use.

The invention discloses a treatment method for 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP) copper plating wastewater. The method comprises the following steps: adjusting a pH of the HEDP copper plating wastewater to 10-12 by using a lime emulsion or sodium hydroxide, adding calcium chloride to precipitate HEDP and a potassium sodium tartrate complexing agent, and enabling most of copper ionsto be converted into a 1-hydroxyethylidene-1,1-copper diphosphonate precipitate or a copper hydroxide precipitate; adding sodium diethyldithiocarbamate or sodium dimethyldithiocarbamate to precipitateresidual copper, and enabling released HEDP and tartrate ions to form precipitates with calcium ions; adding a flocculant to make precipitated particles aggregated, and performing filtration separation on the precipitate; and enabling treatment results of copper, total phosphorus and COD in a supernatant to satisfy requirements of a table 3 of GB 21900-2008 (discharge standard for pollutants fromelectroplating). The treatment method for the HEDP copper plating wastewater provided by the invention has the advantages of a simple process, a small equipment floor space, low processing costs, high practicability and better market prospects.