198 results about "Dimethyldithiocarbamate" patented technology

The invention discloses a liquid making technique for manganese oxide ore, comprising the steps of: adding the manganese oxide ore powder, pyrite powder, sulfuric acid solution into a leaching vat forleaching; adding a neutralizing agent for neutralizing after reaching leaching termination; adding ammonia sulfate, potassium permanganate and sodium dimethyldithiocarbamate into the neutralization liquid after filtration until the nickel is qualitatively removed; then, adding barium sulfide or adding barium sulfide into the filtrate after filtration, wherein the dosage of barium sulfide is 100-2000g/m<3> manganese sulfate solution; adding XY-3 impurity removal agent after filtration, wherein the dosage of XY-3 impurity removal agent is 50-400g/m<3> manganese sulfate solution, the temperatureis controlled at 30-80 DEG C, the reaction time is 0.5-3h, and the pH is 4.5-6.9; and filtrating to obtained purified manganese sulfate solution. The recovery rate of the qualified, refined and purified manganese sulfate solution is more than 90%, based on common electrolytic technique, the quality of products achieves national standard, the electrolytic yield is larger than 3kg/veneer, the powerconsumption is not more than 7500kwh/t, and the yield, cost and efficiency are all better than the traditional level of manganous carbonate production.

The invention discloses a flotation separation inhibitor and separation method of galena, pyrite and sphalerite, and belongs to the technical field of mineral processing. The method includes adopting raw ores of sulfide lead-zinc mine as raw material, and adding SDSN (dimethyl dithiocarbamate : 2-(methylthio)ethylamine = 1-3:1)to serve as inhibitor of the pyrite and the sphalerite so as to perform lead and zinc sulphur flotation separation after the raw ores are grinded. Compared with an existing lead and zinc sulphur separation technology, the composite inhibitor SDSN has the advantages that selectivities of the pyrite and the sphalerite are high, inhibiting capability is high, usage is fewer, and adding is facilitated. The the pyrite and the sphalerite can be inhibited well, efficient separation of the galena and the zinc sulphur is implemented, the problems that according to the traditional lime or cyanide method, the recovery rate of associated gold, silver and other precious metals in the lead-zinc sulfide mine is low and ecological environment is seriously damaged are overcome, and an efficient and environment-friendly flotation separation method is provided for complex sulfide lead-zinc mine separation.

This invention is directed to an synergistic antimicrobial composition which comprises a mixture of an iodopropynyl compound and a dimethyldithiocarbamate compound, said mixture provided in an amount sufficient to protect a substrate from attack by one or more microbial organisms. The composition can be used broadly in industrial systems and more particularly with substrates such as paints, coatings, plastics, wood and wood composites.

The invention belongs to the processing agent technical field, and in particular relates to a heavy metal polluted soil treatment processing agent comprising the following components by mass: 40%-75% of dimethyl dithiocarbamate chelating agent; 20%-45% of diethyl dithiocarbamate chelating agent and 5%-15% of polyethylene imine. Compared with the existing technology, the dimethyl dithiocarbamate chelating agent can effectively fix soil heavy metal ions, and due to the biological activity of the diethyl dithiocarbamate chelating agent, the heavy metal polluted soil treatment processing agent can promote crop absorption of heavy metal ions, that is to say, the heavy metal polluted soil treatment processing agent both has the properties of heavy metal ion fixing and crop absorption of heavy metal ions, so that the treatment process of soil heavy metal ion pollution can be speeded up, and the heavy metal polluted soil treatment processing agent can thoroughly treat soil heavy metal pollution in a short period of time.

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 latex and fiber composite foaming material and a preparation method thereof. The latex and fiber composite foaming material is prepared by mixing the following components in parts by weight: 10-30 parts of fibers, 100 parts of natural latex, 0.3-0.8 part of sodium dodecyl benzene sulfonate, 1.6-3.5 parts of sulfur, 0.6-3.5 parts of zinc dimethyldithiocarbamate, 0.8-2.3 parts of anti-aging agent RD, 15-25 parts of aluminum hydroxide, 1.5-3 pars of zinc oxide, 2.0-2.5 parts of sodium fluorosilicate, 1-8 parts of 3 mass percent formaldehyde and 5-10 parts of latex foaming agent; and the method comprises the steps of preparing the latex, molding the fibers, foaming, putting into a mold, vulcanizing, demolding, washing, drying and the like. The latex and fiber composite foaming material has good elasticity, stable foam structure and good comfort, and overcomes the defects that an un-foamed fiber elastic material is relatively hard and a sponge material is soft in supporting and poor in breathability.

The invention discloses a high-temperature-resistant flame-retardant cable material and a preparation method thereof. The high-temperature-resistant flame-retardant cable material comprises, by weight, 60-80 parts of phenolic resin, 50-100 parts of polyvinyl chloride, 20-40 parts of polyacrylate rubber, 1-3 parts of zinc dimethyldithiocarbamate, 3-6 parts of dibasic lead phosphite, 10-30 parts of antimonous oxide, 5-10 parts of aluminium hydroxide, 5-15 parts of silicon dioxide, 5-30 parts of titanium dioxide, 5-10 parts of glass fibers, 15-30 parts of dioctyl phthalate, 2-6 parts of chlorinated paraffin and 50-80 parts of filler. The high-temperature-resistant flame-retardant cable material has the advantages that on the premise of guaranteeing excellent flexibility and insulativity, combustion of internal polymers of the cable material is inhibited effectively, so that flame retardance of the cable material is improved; the high-temperature-resistant flame-retardant cable material is highly resistant to high temperature, and safety performance is improved while production cost is reduced; the preparation method is simple and easily available to raw materials.

The invention relates to the technical field of capacitors, in particular to an explosion-proof rubber sealant cover for supercapacitors. The explosion-proof rubber sealant cover is characterized by comprising the following raw materials by weight part: 32-38 of high benzene rubber, 22-32 of polyacrylic rubber, 6-12 of titanium dioxide, 3-5 of zinc stearate, 3-5 of lecithin, 5-10 of graphene oxide, 5-10 of aluminum oxide, 3-5 of tea polyphenols, 5-10 of zinc dimethyldithiocarbamate, 3-5 of talcum powder, 2-4 of sulfur and 3-5 of montmorillonite. The preparation method of the explosion-proof rubber sealant cover provided by the invention is simple, and compared with the prior art, has the advantages of reduced energy consumption, green and environmental protection. The prepared product has a reasonable formula, good mechanical properties, fatigue performance, aging resistance, lower heat generation, and good comprehensive performance, and can effectively prevent burst of capacitors by installing on the shells of the supercapacitors.

A composite heavy metal chelating agent for waste incineration fly ash and a preparation method thereof are disclosed. The composite heavy metal chelating agent includes, by weight, 15-20 parts of anorganic chelating agent, 5-10 parts of an inorganic chelating agent, 2-10 parts of an inhibitor, 2-5 parts of a dispersant and 50-80 parts of water. The organic chelating agent is a mixture of sodiumbutyl dithioxanthate and sodium dimethyldithiocarbamate. The inorganic chelating agent is sodium hexametaphosphate. The inhibitor is sodium lignosulphonate, and the dispersant is sodium silicate. Thecomposite heavy metal chelating agent is a multi-formula composite heavy metal chelating agent, has strong chelation performance for heavy metals in waste incineration fly ash through synergistic effects of organic and inorganic components, can efficiently achieve stabilization treatment of the waste incineration fly ash and can ensure that pollutant concentrations of leach liquor meet standards.The preparation method of the composite heavy metal chelating agent is also provided.

The invention relates to a deep purification and recycling method for waste water containing heavy metal ions. The deep purification and recycling method comprises the following steps: performing chemical neutralization and sedimentation on the waste water containing one or more heavy metal ions to remove most heavy metal ions in water; adding dimethyl carbamodithioic acid or potassium dimethyldithiocarbamate and a polymer flocculating agent, and fundamentally removing the heavy metal ions in the waste water through coagulation sedimentation; adopting sand filtration, ultrafiltration and nanofiltration units to treat effluent water after sedimentation, removing suspended substances, SS, organic matters and partial heavy metal ions in the waste water, wherein the water quality reaches the water quality recycling standard of circulating cooling water after treatment. The waste water containing one or more heavy metal ions at different concentrations can be treated, the application range is large, the operation is simple, and the removal rate is high.

The invention discloses a method for treating alkaline zinc-nickel alloy electroplating wastewater. The method includes destructing strong fatty amine complex agents in the alkaline zinc-nickel alloy electroplating wastewater by the aid of hydrogen peroxide under the condition of pH (potential of hydrogen) of 8-13; enabling dimethyl carbamodithioic acid and heavy metal ions of zinc, nickel and the like to react with one another to generate precipitates of zinc dimethyldithiocarbamate, nickel dimethyldithiocarbamate and the like, and enabling residual heavy metal ions of zinc, nickels and the like in the wastewater to meet requirements of a table 2 in GB 21900-2008 Electroplating Pollutant Discharge Standards. Slow oxidation reaction needs to be carried out for longer than 10h. The method has the advantage that discharge standards can be met by the wastewater after the precipitates are separated from the wastewater.

The invention relates to a method for detecting trace N, N-dimethyldithiocarbamate in water. The method comprises the following steps: derivatively reacting a water sample containing N, N-dimethyldithiocarbamate with a derivatization reagent at pH value of 7.0-10.0 for 10-40 min, so as to obtain flavescent derivative tetramethyl thiuram disulfide; next, detecting tetramethyl thiuram disulfide by using an efficient liquid chromatography, so as to obtain a chromatogram; inputting a chromatographic peak appearing time into an Agilent 1200 LC chemical workstation and processing the chromatographic peak appearing time in the chemical workstation so as to obtain peak height and peak area; and finally, first finding out the peak area on a longitudinal coordinate in a standard curve graph and then finding out data on a horizontal ordinate, which represents the concentration of N, N-dimethyldithiocarbamate in the water, on a curve corresponding to the longitudinal coordinate representing the peak area. The method for detecting trace N, N-dimethyldithiocarbamate in the water, provided by the invention, has the advantages of mild and rapid derivative reaction, no interference peak, rapidness, simplicity, convenience, high accuracy and good repetitiveness; and trace N, N-dimethyldithiocarbamate in municipal sewage can be effectively detected.

The invention discloses a pre-dispersion masterbatch used as a rubber ultra-fast accelerator ZDMC. The pre-dispersion masterbatch used as the rubber ultra-fast accelerator ZDMC consists of the following components in parts by weight: 75-82 parts of zinc dimethyldithiocarbamate, 10-14 parts of a rubber carrier, 2-6 parts of naphthenic oil, 1 part of stearic acid, 1 part of triethanolamine, and 2-5 parts of a mixture of saturated and unsaturated fatty acid zinc soap. The zinc dimethyldithiocarbamate is prepared into the pre-dispersion masterbatch, so that the original activity of the zinc dimethyldithiocarbamate can be guaranteed effectively. The pre-dispersion masterbatch cannot be caked at room temperature, and batching is convenient and accurate, when the pre-dispersion masterbatch is used as an ultra-fast accelerator in the follow-up process, dust flying is avoided in a rubber melting process, a working environment of an operator can be improved, the use level of the accelerator is reduced, and the utilization rate of the zinc dimethyldithiocarbamate is increased; the pre-dispersion masterbatch has relatively low Mooney viscosity at the relatively low temperature of 50 DEG C, and has good dispersibility in rubber, and the quality of a rubber product can be improved.

The invention discloses an irradiation-resistant, halogen-free and flame-retardant ethylene-propylene cable material and a preparation method thereof. The cable material comprises 40-80 parts of polypropylene, 20-40 parts of ethylene propylene rubber, 0.5-1 part of dicumyl peroxide, 1-2 parts of zinc dimethyldithiocarbamate, 5-10 parts of aluminum hydroxide, 3-6 parts of magnesium hydroxide, 2-8 parts of triphenyl phosphate, 6-12 parts of p-dibenyl bisphosphate, 5-10 parts of metal fibers, 3-8 parts of silver fibers, 8-12 parts of glass fibers, 1-4 parts of 2-hydroxy-4-octyloxybenzophenone, 10-12 parts of a plasticizer, 3-6 parts of chlorinated paraffin, 0.5-1 part of an antioxidant, 1-4 parts of a cross-linking agent and 6-10 parts of a coloring agent. The cable material has the advantages of no halogen, good insulating property, good ageing resistance, good flame retardation property, good irradiation resistance, high mechanical strength and simple preparation method.

The invention provides a heat-resistant oil-resistant rubber seal ring and a preparation method thereof. The preparation method comprises the following steps: (1) weighing raw materials according to the weight parts, and adding nitrile-butadiene rubber, zinc oxide, stearate, sulfur, bis-pentamethylenethiuram tetrasulfide, zinc dimethyldithiocarbamate, poly-hydroxy isopropyl p-phenylenediamine, a 2,2,4-trimethyl-1,2-dichloroquinoline polymer, a silane coupling agent SG-Si996, trimellitate, a hydantoin epoxy resin, a bismaleimide modified epoxy resin and a curing agent 704 into a Banbury mixer, and banburying; (2) adding the sizing material into an open mill, adding carbon black, a norbornene-terminated polyamide resin and an alkyd resin according to the weight parts, and carrying out compounding forming; (3) adding the formed rubber into a mold of a vulcanizer, and carrying out vulcanization treatment; and (4) carrying out trimming, inspection, packaging and warehousing. The seal ring has the advantages of excellent oil resistance and excellent high-temperature resistance.

The invention relates to an additive for inhibiting re-release of mercury during wet method flue gas desulfurization process and a using method thereof. The additive comprises the following components in percentage by weight: 30%-45% of sodium tetrasulfide, 30%-45% of dimethyl dithiocarbamate and 10%-40% of trimercapto-triazine metal salt. At normal temperature and normal pressure, the additive is added into desulfurization slurry, and the adding amount of the additive is 50-800mg/L. The additive disclosed by the invention can perform better action with Hg2+ in the slurry by utilizing the synergistic effect of the sodium tetrasulfide, the dimethyl dithiocarbamate and the trimercapto-triazine metal salt so as to form a stable HgS precipitate or a stable chelate, and the precipitate or the stable chelate and desulfurization gypsum can enter a solid phase together for being separated and removed. Simultaneously, the composite additive is more suitable for being added under operation conditions of a wet method desulfurization system.

The invention discloses a method for preparing antibacterial yarns. The method is characterized by comprising the following steps: sequentially adding the following components in parts by weight into a container: 50-70 parts of water, 11-13 parts of nano-silver and 3-5 parts of dimethyl dithiocarbamate, and fully stirring for 60 minutes; adding a PH value regulator for regulating the PH value to 7; adding nano-modified bamboo charcoal yarns into the container for fully soaking for 30-50 minutes; taking out the soaked yarns, and drying at the temperature of 75 DEG C for 55 minutes. According to the mode, due to the method for preparing antibacterial yarns, the yarns are soaked in a prepared antibacterial solution, so that the yarns have high-efficiency antibacterial performances, the method is simple, and the production efficiency is high.