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167 results about "Sodium diethyldithiocarbamate" patented technology
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Sodium diethyldithiocarbamate is the organosulfur compound with the formula NaS₂CN(C₂H₅)₂.
Nano biological filler for purifying aquaculture wastewater in biological filter tank and preparation method of nano biological filler
InactiveCN104085979AGood biocompatibilityLarge specific surface areaSustainable biological treatmentOn/in inorganic carrierBiological filterKaolin clay
The invention discloses nano biological filler for purifying aquaculture wastewater in a biological filter tank and a preparation method of the nano biological filler. The biological filler comprises an EM rejuvenation solution and an adsorption carrier of the EM rejuvenation solution, wherein the EM rejuvenation solution is a product obtained by performing mixed fermentation on an EM stock solution, molasses and deionized water; the adsorption carrier is obtained by performing mixed pressing on composite nano powder, kaolin powder and modified bentonite; the composite nano powder is a product obtained by performing mixing and high-temperature sintering on nano-level aluminum oxide, titanium dioxide and silicon dioxide; modified bentonite is prepared from sodium diethyldithiocarbamate modified original soil. The preparation method comprises the following steps: pressing adsorption carrier particles; fermenting to obtain the EM rejuvenation solution; dipping the EM rejuvenation solution by using the adsorption carrier to obtain the nano biological filler. The obtained nano biological filler is high in pore volume, high in cell adsorption capacity, large in specific surface area and strong in stability, has a good treatment effect on aquaculture sewage, and can be used for rapidly removing ammonia nitrogen, phosphorus and heavy metal ions in an aquaculture water body.
Owner:江苏三新山水生物科技有限公司
Process for increasing complicated sulfurized-lead-zinc ore dressing recovery rate
The present invention is green process of recovering complicated lead-zinc sulfide ore in high recovering rate. The technological process adopts lime to form high alkalinity and maintain the original potential of lead-zinc sulfide slurry during ore grinding floatation, sodium diethyl dithioamino formate as the selective lead mineral collecting agent, copper sulfate as the sphalerite activating agent and butyl xanthate as the zinc mineral collecting agent for optimized successive fast floatation. The present invention has raised recovering rate, low chemical consumption, simple technological process and low production cost.
Owner:青海西部矿业科技有限公司
Cu3BiS3 ternary sulfur nano material and preparation method thereof
InactiveCN103553130APromote absorptionLow costMaterial nanotechnologyEnergy modified materialsSolventThermal effect
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.
Owner:SHANGHAI NORMAL UNIVERSITY
Reagent formula used for zinc leaching residue floatation process and application method of reagent formula
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%.
Owner:XINGMIN TECH ZHUZHOU
Preparation method of high efficiency CdS-CdIn2S4 superstructure photocatalyst
InactiveCN106076364ARich sourcesEasy to operateElectrolysis componentsPhysical/chemical process catalystsDecompositionCadmium acetate
The invention discloses a preparation method of a high efficiency CdS-CdIn2S4 superstructure photocatalyst. The preparation method comprises that 1, cadmium acetate and sodium diethyldithiocarbamate as raw materials undergo a solvothermal reaction in an ethylenediamine-dodecanethiol mixed solvent at a temperature of 180 DEG C for 24h to produce a CdS nano-wire, and 2, the prepared CdS nano-wire, InCl3. 4H2O and L-cysteine undergo a reaction in ethanediol as a solvent at a temperature of 200 DEG C under the condition of backflow for some time to produce a finished product. The preparation method is green and environmentally friendly and realizes large scale production. The CdS nano-wire / CdIn2S4 nano-sheet composite superstructure can be used in the field of energy conversion such as water decomposition hydrogen production based on photocatalysis and photoelectrocatalysis.
Owner:WENZHOU UNIVERSITY
Pasted nickel hydroxide electrode and additives for rechargeable alkaline batteries
ActiveUS20140199591A1Prevent peelingMinimize migrationFinal product manufactureConductive materialNickel electrodeNickel zinc
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.
Owner:ZINCFIVE POWER INC
SiO2/MoS2 core-shell-structure microspheres and preparation method thereof
ActiveCN104694208AImprove the coordination effectImprove stabilityAdditivesDispersityEthylenediamine
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.
Owner:峰特(浙江)新材料有限公司
Method for integrated treatment of electroplating wasterwater
ActiveUS20200048125A1Efficient removalSolve problemsTreatment using aerobic processesGeneral water supply conservationCarboxyl radicalThio-
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.
Owner:GUANGZHOU ULTRA UNION CHEM LTD
Masking-agent-containing test strip for detecting content of cadmium in Chinese herbal medicine
ActiveCN103776826AExtended storage timeEasy to carryMaterial analysis by observing effect on chemical indicatorSodium potassium tartrate tetrahydrateThiourea
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.
Owner:INFINITUS (CHINA) CO LTD
Method for treating alkaline zinc-nickel alloy electroplating waste water
ActiveCN107857389AAvoid difficultiesStrong precipitation abilityWaste water treatment from metallurgical processMultistage water/sewage treatmentPrecipitation particleSodium carbamate
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.
Owner:GUANGZHOU ULTRA UNION CHEM LTD
CeO2 (Cerium Oxide) nano-particle/CdS (Cadmium Sulfide) nano-rod composite photo-catalyst as well as preparation method and application thereof
ActiveCN104689835ATransmit electrons fastEnhanced light absorptionPhysical/chemical process catalystsWater/sewage treatment by irradiationCeriumEthyl group
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.
Owner:HUNAN UNIV
Preparation method of multifunctional probe for tumor thermotherapy as magnetic resonance imaging contrast agent
InactiveCN104623659AImprove structural stabilityGood biocompatibilityEnergy modified materialsNMR/MRI constrast preparationsRadio frequencyOleylamine
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.
Owner:SHANGHAI JIAO TONG UNIV +1
Preparation method of tellurium diethyl dithiocarbamate, pre-dispersing masterbatch particles comprising tellurium diethyl dithiocarbamate and preparation method thereof
ActiveCN104447456AIncrease packing capacityGood dispersionOrganic chemistryMasterbatchDiethyl dithiocarbamate
The invention provides a preparation method of tellurium diethyl dithiocarbamate which is used as an ultra fast accelerator. The preparation method comprises the following steps: a, crushing metal tellurium to obtain tellurium powder with the average diameter which is less than 30 microns; b, dropwise adding a strong acid and fully reacting; c, dropwise adding an alkaline solution; d, controlling the pH at 10-14 and stirring for 0.5-3 hours; and e, adding sodium diethyl dithiocarbamate to adjust the pH of the solution in a range of 7-10 and reacting to obtain tellurium diethyl dithiocarbamate. The invention further provides a method for preparing pre-dispersing masterbatch particles which contain tellurium diethyl dithiocarbamate and the pre-dispersing masterbatch particles which contain tellurium diethyl dithiocarbamate. The TDEC is used in rubber as a rubber accelerator in form of the pre-dispersing masterbatch particles comprising tellurium diethyl dithiocarbamate.
Owner:NINGBO ACTMIX POLYMER
Method for determining content of cadmium in soil by ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry)
InactiveCN104034718AResolve interferenceSimple methodPreparing sample for investigationAnalysis by thermal excitationOptical emission spectrometryDigestion
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.
Owner:NINGBO UNIV
Preparation method for modified sepiolite and application of sepiolite in environmental restoration
ActiveCN106582547AImprove adsorption capacityImprove adsorption stabilityOther chemical processesWater contaminantsSodium diethyldithiocarbamateEnvironmental remediation
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.
Owner:YONKER ENVIRONMENTAL PROTECTION
Method for preparing semi-conductor luminescent material manganese-doped zinc sulfide nano powder
InactiveCN101391802ANo protectionSave raw materialsZinc sulfidesLuminescent compositionsMANGANESE ACETATEFluorescence
The invention relates to a method for preparing semiconductor fluorescent material which is mixed with manganese, zinc sulphide and nanometer power. The method comprises the following steps: manganese acetate and zinc acetate are respectively weighted according to the mol ration of 1:99 or 3:97 or 5:95 to ensure that the amount of general matter of Zn<2+> and Mn<2+> is 0.01 mol; the two solid powder is mixed and dissolved with water to prepare 200 ml solution; 0.02 mol of sodium diethyldithiocarbamate powder is weighted and dissolved with water to prepare 200 mL solution; the two solutions are stirred and blended; the obtained precipitation is pumped and filtrated to obtain precursor Zn<1-x>Mn(DDTC)2, wherein, X is 0.01 or 0.03 or 0.05; 1.0 g of precursor Zn <1-x>Mn(DDTC)2 is put in a pot and placed in a muffle to be heated for 3 hours at the temperature of 300 DEG C, and then naturally cooled to the room temperature; finally Zn<1-x> MnxS of hexahedron phase is obtained. The invention solves defects such as complex operation, higher energy consumption, large kernels, many defects in crystals, plenty of water or organic solvent being polluted and wasted, long period, low productive rate, high cost and the like. The invention has the advantages of inexpensive and easy available raw materials, simple technique, low energy conservation, excellent semiconductor property and fluorescence property.
Owner:YANGZHOU UNIV
Combined treatment method of electroplating mixed wastewater
ActiveCN110818173AReduce CODAvoid difficultiesTreatment using aerobic processesGeneral water supply conservationWater chlorinationSodium cyanide
Owner:GUANGZHOU ULTRA UNION CHEM LTD
Preparation method of tellurium diethyl dithiocarbamate
InactiveCN103524390AReduce production processSimple processOrganic chemistryImpuritySodium carbamate
The invention provides a preparation method of tellurium diethyl dithiocarbamate. The preparation method comprises the following steps of: removing impurities from a tellurium-containing waste through alkali heating alkali fusion so as to obtain an alkali metal tellurite solution; dissolving sodium diethyl dithiocarbamate in a buffer solution to obtain a buffer solution containing sodium diethyl dithiocarbamate, and adding the alkali metal tellurite solution and hydrochloric acid solution into the buffer solution containing sodium diethyl dithiocarbamate to ensure that sodium diethyl dithiocarbamate reacts with alkali metal tellurite, wherein the buffer solution is one of a boric acid-borax solution, borax-disodium hydrogen phosphate solution, and disodium hydrogen phosphate-sodium hydroxide solution; performing aging after reaction; then cooling, filtering, washing and drying to obtain tellurium diethyl dithiocarbamate. The preparation method provided by the invention can simplify the process, reduce the production cost and avoid the generation of harmful gas, and a product is high in purity and controllable in particle size.
Owner:FIRST RARE MATERIALS CO LTD
Pasted nickel hydroxide electrode and additives for rechargeable alkaline batteries
ActiveUS9337483B2Prevent peelingMinimize migrationFinal product manufactureAlkaline accumulator electrodesSodium diethyldithiocarbamateNickel oxide hydroxide
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.
Owner:ZINCFIVE POWER INC
Method for detecting trace copper in wastewater rapidly
InactiveCN102519947AGood colorEasy to observeMaterial analysis by observing effect on chemical indicatorPreparing sample for investigationSodium diethyldithiocarbamateWastewater
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.
Owner:KUNMING FURUITE TRADE
Method for treating potassium chloride cyanide-free cadmium plating wastewater
ActiveCN108164031AEasy to handleEffective precipitationWater contaminantsWaste water treatment from metallurgical processPotassiumCadmium Cation
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.
Owner:GUANGZHOU ULTRA UNION CHEM LTD
Method for preparing high-quality stannic sulfide nanosheet by use of single-source molecular precursor
The invention relates to a method for preparing a high-quality stannic sulfide nanosheet by use of single-source molecular precursor. The method comprises adding stannic chloride pentahydrate into anhydrous ethanol to prepare stannic chloride solution; dissolving sodium diethyldithiocarbamate powder in anhydrous ethanol to prepare sodium diethyldithiocarbamate solution; adding the stannic chloride solution into the sodium diethyldithiocarbamate solution, stirring, vacuum filtering and drying at 60 DEG C. to obtain a single-source molecular precursor Sn-(DDTC)4; putting the single-source molecular precursor Sn-(DDTC)4 into a high pressure vessel, and adding 2.5%-10% aqueous solution of acetic acid as solvent; and placing in an electric oven, heating at 180 DEG C. for 24 hours, cooling, vacuum filtering, washing by deionized water and anhydrous ethanol, and drying at 60 DEG C. to obtain yellow stannic sulfide powder. The invention overcomes the defects of an element direct reaction method and a chemical precipitation method, involves a low-toxicity easily-accessible single-source molecular precursor with reasonable price, simplifies the preparation process, and easily obtains a uniform-composition pure phase nanomaterial conforming to stoichiometric ratio. The obtained product has high crystallization degree and is nanosheet-like pure hexagonal phase stannic sulfide.
Owner:YANGZHOU UNIV
Treatment method of chemical nickle-plating waste water
ActiveCN108218129AAvoid difficultiesEasy to handleWaste water treatment from metallurgical processMultistage water/sewage treatmentSodium carbamatePrecipitation
Owner:GUANGZHOU ULTRA UNION CHEM LTD
Lanthanide rare earth ytterbium-doped silver sulfide quantum dots, a preparing method thereof and applications of the quantum dots
ActiveCN106867532ASimple preparation processLow costZinc sulfidesLuminescent compositionsRare earthLanthanide
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.
Owner:WUHAN UNIV OF TECH
Cadmium copper lead polluted bottom mud curing agent and curing method thereof
ActiveCN105967470ARaise the pHSufficient raw materialsWater treatment parameter controlSpecific water treatment objectivesMunicipal solid waste landfillMonopotassium phosphate
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).
Owner:JIANGXI JIEDI ENVIRONMENTAL TREATMENT & ECOLOGICAL TECH CO LTD
Method of modifying elastin by initiation transition termination agent
InactiveCN101016334AImprove hydrophilicityReduced thermal stabilityAnimals/human peptidesCrystallographySodium diethyldithiocarbamate
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.
Owner:TIANJIN UNIV
Method for preparing high-quality copper indium sulfide by employing single-source molecular precursor
InactiveCN101734712ASave raw materialsRaw materials are easy to getGallium/indium/thallium compoundsSolubilityGas phase
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.
Owner:YANGZHOU UNIV
Recycling agent for recycling heavy-metal polluted soil leaching waste liquid, and preparation method and application of recycling agent
InactiveCN108579669AAvoid consumptionSolve consumptionOther chemical processesAluminium silicatesLiquid wasteSodium diethyldithiocarbamate
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.
Owner:TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Treatment method of fluorescent PCR amplification sample and kit
The invention provides a treatment method of a fluorescent PCR amplification sample and a kit. The treatment method of the fluorescent PCR amplification sample is characterized in that an initial material and a sample treatment solution are included, wherein the sample treatment solution and the initial material are mixed to obtain a treatment product, the treatment product is directly used for the fluorescent PCR detection, the initial material is a blood sample or an oral epithelial cell sample, and the sample treatment solution is prepared from the following components: Tris-HCl, NaOH, Trixon X-100, sodium diethyl dithiocarbamate, sodium lauryl sarcosinate, NP-40, DMSO, glycine betaine and BSA. The kit comprises the sample treatment solution. The problems of the existing conventional method that the loss of DNA is great and the operation is complex due to the pre-extraction of DNA when the fluorescent PCR detection is performed can be solved. The treatment method is suitable for thefluorescent PCR detection of various uses of trace samples such as blood, oral epithelial cells and the like and is convenient in popularization.
Owner:天津安必森生物技术有限公司
Combined treatment method for HEDP copper plating wastewater
ActiveCN108383269ASimple methodSmall footprintWater contaminantsWaste water treatment from metallurgical processCopper platingFiltration
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.
Owner:GUANGZHOU ULTRA UNION CHEM LTD
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