173 results about "Diethyl dithiocarbamate" patented technology

The invention discloses a heavy metal chelating agent for waste incineration fly ashes. The heavy metal chelating agent for the waste incineration fly ashes comprises a compound chelating agent and a sodium hydroxide solution mixed with a weight ratio being 1:2-3, wherein the compound chelating agent comprises, by weight percentage, 60-90% of an organic chelating agent, and 10-40% of an inorganic chelating agent, the organic chelating agent is dithiocarbamates and is one or more selected from zinc diethyl dithiocarbamate, zinc dimethyl dithiocarbamate, sodium dibutyl dithiocarbamate or sodium dibenzyl dithiocarbamate, and the inorganic chelating agent is one or two selected from sodium sulfide and sodium phosphate. The heavy metal chelating agent for the waste incineration fly ashes is capable of reducing the leaching concentration of heavy metals and ensuring that a fly ash solidification sample block can meet the limit value of the leaching concentration. The invention further provides a preparation method for the heavy metal chelating agent for the waste incineration fly ashes.

The invention discloses a copper ion test paper, which comprises a substrate (1) and chromogenic test paper (2) fixed on the substrate (1), and is characterized in that the chromogenic test paper (2) is prepared by steeping filter paper in a steeping fluid, taking out the filter paper from the steeping fluid and drying the filter paper, wherein the steeping fluid consists of the following components by weight: 0.07 to 1.4 percent of sodium diethyl dithiocarbamate, 5.7 to 11.4 percent potassium sodium tartrate, 0.036 to 0.71 percent of soluble starch, and 86.49 to 94.194 percent of distilled water. The invention also provides a method for preparing the copper ion test paper. The test paper has the advantages of simple fabrication, low cost, convenient use, no pollution to the environment, and favorability for environmental protection; and besides, the test paper has wide test range, is not required to be operated by a professional, and is particularly applicable to quick field test of copper content.

The invention relates to a heavy metal stabilizer for treating waste incineration fly ash and a method for using the same. Composition of alkaline substances and silicate minerals and / or adsorbents. The use method includes: fully stirring and mixing phosphate, inorganic alkaline substances, silicate minerals and / or adsorbents in proportion, and then adding waste incineration fly ash for maintenance. The invention does not contain any organic chelating agent such as dithiocarbamate or sulfide, has no secondary pollution and pollution-free; the method of use is simple, the cost is low, and it meets the benefits of energy saving and carbon reduction, economic benefits, and has good application prospects.

The invention discloses a preparation method of rubber for an outer glue layer of a power steering tube of an automobile and belongs to the technical field of rubber parts for automobiles. The preparation method comprises the following steps: mixing chlorosulfonated polyethylene, fast extruding furnace black, carbon black prepared by a cracking process, magnesium oxide, zinc diethyl dithiocarbamate, dilauryl thiodipropionate, zinc stearate, 2,2'-dithiodibenzo thiazole, trioctyl trimellitate and strong magnesium powder in an external mixer, and after mixing, discharging rubber under a condition that the rubber temperature is 160 DEG C to prepare masterbatch; and putting the prepared masterbatch into the external mixer, adding trithiocyanuric acid and sulfur in the raw materials and mixing; and after mixing, sequentially extruding at a certain temperature interval to prepare the rubber for the outer glue layer of the power steering tube of the automobile. Compared with the rubber for the outer glue layer of the power steering tube of the automobile prepared in the prior art, the rubber prepared by the preparation method has the advantage that the heat resistance of the rubber is effectively improved by mutual synergistic effect among the raw materials and matching corresponding extrusion temperatures.

The invention relates to a flotation method for lead and zinc ore difficult to select. The method includes the following steps of lead roughing, two-time lead scavenging, three-time lead fine selection, zinc roughing, two-time zinc scavenging and three-time fine selection. Lime serves as regulators, zinc sulfate and sodium sulfite serve as zinc inhibitor, diethyl dithiocarbamate and ethyl xanthogenate serve as lead collecting agents, copper sulfate serves as zinc activating agents, ammonium dibutyl dithiophosphate serves as zinc collecting agents, and terpenic oil serves as foaming agents. The lead and zinc ore difficult to select is processed by the adoption of lead differential flotation and zinc selection technological processes, and the practical problems that in original technological processes, zinc contains a high content of lead which contains a high content of the zinc, and the lead recovery rate and the zinc recover rate are low are solved. The technological processes are simple, reliable, easy to operate, and good in sorting index. Compared with the original technological processes, the method has the advantages that under the circumstance that raw ore contains the same lead and zinc, mutual containing of the lead and zinc is reduced, and the lead recovery rate and the zinc recovery rate are greatly increased and increased by 9.29% and 9.05% respectively.

The invention relates to a heavy metal stabilizer for treating industrially polluted soil and a method for using the heavy metal stabilizer. The heavy metal stabilizer consists of phosphate, inorganic Composition of alkaline substances and adsorbents. The method of use includes: fully stirring and mixing phosphate, inorganic alkaline substances and adsorbents in proportion, and then adding them to the soil of industrially polluted sites for conservation. The invention does not contain any organic chelating agent such as dithiocarbamate or sulfide, has no secondary pollution and pollution-free; the method of use is simple, the cost is low, and it meets the benefits of energy saving and carbon reduction, economic benefits, and has good application prospects.

The invention discloses a method for preparing monodisperse near-infrared quantum dots, comprising the following steps: using diethyl dithiocarbamate as a monophyletic reaction precursor; carrying out pyrolytic reaction in mixed solution of surface active agent with high boiling point and different coordination properties and selecting silver sulfide as the target product to be prepared to obtainquantum dots with excellent dispersibility, low toxicity and near-infrared emitted light property. The method of the invention features in mild reaction conditions, simple operation, safety and good repeatability, eliminates toxicity caused by using the traditional quantum dots and provides necessary and provides necessary preparations for studies of application of the quantum dots as a fluorescence label indicator to a near-infrared biomarker and to the image formation field.

The invention discloses an engine mounting heat-resisting material and a preparation method thereof. The engine mounting heat-resisting material comprises the following raw materials in parts by weight: 70 to 80 parts of standard natural rubbers, 10 to 20 parts of butadiene rubbers, 5 to 10 parts of zinc oxide, 1 to 3 parts of stearic acid, 1 to 3 parts of 2,2,4-trimethyl-1,2-dihydro-chinoline polymers, 1 to 2 parts of N-isopropyl-N-phenylene diamine, 1 to 3 parts of composite paraffin, 25 to 40 parts of carbon black, 3 to 6 parts of complex calcium salt, 5 to 8 parts of white carbon black, 1to 3 parts of silane coupling agent, 1 to 2 parts of sulphur, 1 to 3 parts of zinc diethyl dithiocarbamate, and 1 to 3 parts of N-Cyclohexyl-2-benzothiazole. In the invention, an engine mounting material with good heat-resisting performance is prepared through a special refining process, has long service life and saves the using cost.

The invention discloses a method for recovering low-grade copper-zinc mineral from cyanidation tailings. The method comprises the following specific process steps: (1) adding water into the cyanidation tailings for mixing slurry; (2) adding a sodium hypochlorite solution into pulp, and stirring; (3) adding diethyl dithiocarbamate and ethionine ester as collecting agents, and stirring; (4) performing bulk flotation on copper-lead mineral by performing roughing once, concentration twice and scavenging once to obtain copper-lead mixed concentrate and copper-lead flotation tailings; (5) performing ultrasonic oscillation on slurry-mixed copper-lead mixed concentrate, dehydrating the copper-lead mixed concentrate subjected to ultrasonic oscillation to obtain a filter cake, mixing slurry once again, adding a CP mixture as a conditioning agent, adding ethionine ester as a collecting agent, and adding terpenic oil as a foaming agent for flotation to obtain qualified copper concentrate and copper flotation tailings; (6) performing slurry mixing on the copper-lead flotation tailings, adding copper sulfate for activating zinc mineral, adding sodium butyl xanthogenate as a collecting agent, and adding terpenic oil as a foaming agent for floatation to obtain zinc concentrate and zinc flotation tailings.

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.

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 rare earth rubber vulcanization accelerator, and a preparation method and application thereof. The accelerator is prepared by compounding rare earth ions and carboxylic acid substituted dithiocarbamate, wherein the rare earth ions may be one or the mixture of more than one of 14 rare earth elements, except promethium which is a radioactive element, with the atomic numbers of 57 to 71 in the periodic table of elements. The rare earth vulcanization accelerator of the invention is added into a rubber formula without adding the vulcanization active agents of stearic acid and zinc oxide to achieve good vulcanization effect and prepare a rubber composite material with high comprehensive mechanical properties which are remarkably superior to those of the accelerator zinc diethyl dithiocarbamate (ZDC) commonly used in industry at present in the same proportion, is a carbamate rare earth compound of primary amine, does not produce nitrite in a vulcanization process, and is environmentally-friendly.

The invention relates to an ethylene propylene diene monomer (EPDM) composition for low-hardness glue injection. The composition comprises the following ingredients: EPDM rubber, activated zinc oxide, stearic acid, polyethylene glycol, 2,2,4-trimethyl-1,2-dihydroisoquinoline polymer, carbon black N330, carbon black N550, silicon dioxide hydrate, paraffin oil, coupling agent Si-69, accelerator DM, zinc diethyl dithiocarbamate, tetramethyl thiuram disulfide, bis(pentamethylene)thiuram tetrasulfide, and sulphur. According to the formula of the composition, the original hardness is low and is only about 50 degrees, the tensile strength and 100% stress at definite elongation are high, thermal air aging resistance property, the coldness resistance and low-temperature crispness are all excellent to meet the use requirement under low-temperature environment of different regions in winter, the lowest temperature can reach minus 45 degrees, glue injection technique is adopted to be capable of saving labor time and manual work. The composition formula can meet the requirements of RCF-510 grade material in MES MN300 standard.

The invention relates to a preparation method of a nitrogen and sulfur co-doped porous carbon microsphere composite material. The method comprises the following steps of S1, performing closed reactionon hexachlorobutadiene, tellurium diethyl dithiocarbamate (TDEC) and a solvent under high temperature and high pressure; S2, relieving pressure to normal pressure after reaction is completed, naturally cooling to a room temperature, and drying the obtained solid to obtain a dried sample; and S3, performing high-temperature roasting processing on the dried sample under protection of inert gas so as to obtain the nitrogen and sulfur co-doped porous carbon microsphere composite material. The invention also relates to the composite material, application thereof and oxidization-reduction performance comprising the composite material. The nitrogen and sulfur co-doped porous carbon microsphere composite material has excellent performance and can be used for preparing an oxidization-reduction electrode of a fuel cell, so that the nitrogen and sulfur co-doped porous carbon microsphere composite material can be used in the fuel cell, shows excellent electrochemical performance and has huge application potential and industrial value in the field of electrochemistry.

The invention discloses a copper gold silver ore flotation collecting agent and a flotation method, belongs to the technical field of ore flotation, and solves the prominent problems of low copper gold silver ore beneficiation efficiency, high cost and the like. The copper gold silver ore flotation collecting agent ester-205 is prepared from the following raw materials: 30 to 40 parts of N,N-diethyl dithiocarbamate, 20 to 25 parts of diisopropyl dithiophosphate, 10 to 15 parts of black powder acid, 20 to 30 parts of terpenic oil and 2 to 5 parts of ethyl alcohol. The flotation method comprises the following steps: preparation of flotation pulp, flotation preparation and copper gold silver ore flotation. According to the copper gold silver ore flotation collecting agent and the flotation method, multiple circulation times and metal loss of target metal ores in a flotation process are effectively avoided, so that the trunk flotation process is shortened, and the investment and operation cost is reduced; the collecting agent ester-205 is high in collecting capacity; the flotation speed is increased; the copper gold silver recycling rate is increased; the number of the scavenging times is reduced; and the types and the use amounts of flotation agents are reduced.

The invention relates to fire-resistant oil-resistant rubber which comprises the following raw materials in parts by weight: 10-150 parts of chloroprene rubber, 10-100 parts of fluorosilicone rubber, 1-5 parts of nano-zinc oxide, 1-4 parts of stearic acid, 10-25 parts of magnesium hydroxide, 1-5 parts of aluminum phosphate, 1-10 parts of sulphur, 1-4 parts of N-phenyl-alpha-phenylamine, 1-10 parts of calcium carbonate, 1-6 parts of hydroxyl silicone oil, 1-8 parts of hydrogen silicone oil, 1-5 parts of white carbon black, 1-15 parts of dimethyl silicon oil, 1-10 parts of dibutyl phthalate, 1-8 parts of zinc diethyl dithiocarbamate and 1-8 parts of 2-thiol group imidazoline. The fire-resistant oil-resistant rubber disclosed by the invention has the advantages of good oil-resistant property, high-temperature resistance, fire resistance, corrosion resistance and the like and can effectively meet the requirements of production and living.

The invention relates to a hydrogenated nitrile-butadiene rubber composition. The composition comprises hydrogenated nitrile-butadiene rubber, butadiene rubber, an anti-aging agent MBZ, an anti-aging agent DDA, mixed gas carbon black, quick pressed-out carbon black N550, dioctyl adipate, dioctyl sebacate, dicumyl peroxide, triallyl isocyanurate, selenium diethyl dithiocarbamate and gamma-amino propyl triethoxysilane. The low-temperature resistance of the hydrogenated nitrile-butadiene rubber is further enhanced by using the hydrogenated nitrile-butadiene rubber and the butadiene rubber together under the combined action of auxiliary agents such as the dioctyl adipate, the dioctyl sebacate and like; the hydrogenated nitrile-butadiene rubber has the brittleness temperature of up to -56 DEG C, no breakage and still good oil resistance; and other performance of the rubber is not changed obviously. The low-temperature resistance of the hydrogenated nitrile-butadiene rubber is improved and simultaneously the use value of the rubber is improved, which has great significance for better use of the hydrogenated nitrile-butadiene and products thereof in automobile industry, petrochemical industry and the like. Moreover, the safety insurance of the products is improved and the service life of the products is prolonged.

The invention relates to a floatation method of sulfur-oxygen mixed lead antimony ore. Sodium carbonate is used as a pH regulator, sodium hexametaphosphate is used as a fine sludge mineral dispersing agent, zinc sulfate and calcium hypochlorite are used as a gangue mineral inhibitor, sodium sulfide, ammonium bicarbonate and lead nitrate are used as a lead antimony ore activator, diethyl dithiocarbamate and butyl xanthate are used as a lead antimony ore collector, and 2# oil is used as a foaming agent, thereby performing floatation on the sulfur-oxygen mixed lead antimony ore to obtain the lead antimony mixed concentrate. The method can effectively recover the sulfur-oxygen mixed lead antimony ore. Under the conditions that the lead grade of the feed ore is 0.28-1.07% and the antimony grade is 0.24-0.83%, the lead antimony mixed concentrate, of which the lead grade is 20.87-34.55% and the antimony grade is 17.53-28.40%, can be obtained. The lead recovery rate is 75.21-82.77%, and the antimony recovery rate is 73.60-80.75%.

The invention discloses a preparation method for rubber for the inner rubber layer of a car power steering hose, and belongs to the technical field of car rubber pieces. The preparation method comprises the following steps: adding chlorosulfonated polyethylene, fast extruding furnace black, cracking carbon black, magnesium oxide, zinc diethyl dithiocarbamate, dilauryl thiodipropionate, zinc stearate, 2,2'-dithio-dibenzo thiazole, trioctyl trimellitate and magnesium strong powder into an internal mixer for banburying; after banburying, discharging rubber at the rubber temperature of 160 DGE C to obtain a master batch; adding the prepared master batch into the internal mixer, and adding in trithiocyanuric acid and sulphur for mixing; after mixing, sequentially squeezing out within a certain temperature range to obtain rubber for the inner rubber layer of the car power steering hose. Compared with that manufactured rubber for an inner rubber layer of a car power steering hose in the prior art, the rubber adopts the synergistic effects of the raw materials and the corresponding squeezing temperatures to effectively improve the heat resistance property of the rubber.

The invention discloses a heatproof high-strength cable which comprises a conductor, an insulating layer, a high-temperature-resistant layer and an outer sheath insulating layer which are made of a modified polyvinyl chloride material. The modified polyvinyl chloride material comprises polyvinyl chloride, nylon, maleic anhydride grafted polyphenyl ether, bisphenol-A polycarbonate, stearic acid pentaerythritol ester, trioctyl trimellitate, stearic acid, isopropyl phenyl diphenyl phosphate, calcined kaolin, modified nano-calcium carbonate, maleic acid modified hydrotalcite, modified graphene oxide, carbon nanofibers, diethyl dithiocarbamate neodymium, calcium adipate, glyzinc, beta-diketone, pentaerythritol, ethylene-vinyl alcohol and antioxidant. The heatproof high-strength cable is high in intensity, good in heat resistance and long in service life.

The invention belongs to the field of dangerous waste stabilizing treatment, relates to a method for treating incineration fly ash by mixing diethyl dithiocarbamate carbamate and ferrous sulfate (copperas) in a certain proportion as a stabilization agent, and provides a method for treating multiple kinds of heavy metal in incineration fly ash by mixing diethyl dithiocarbamate carbamate, phosphate and copperas in a certain proportion as an agent to solve the problems that in single use of an existing stabilization agent, many defects exists, for example, a chelating agent is high in use level, cost is high, and multiple kinds of metal are not likely to be fixed by single agents at the same time. According to the method, multiple kinds of heavy metal such as cadmium, lead, zinc and nickel in the incineration fly ash can be fixed at the same time, and therefore the leaching toxicity of the heavy metal is lowered, and the requirement of the Municipal Solid Waste Landfill Contamination Control Standard (GB16889-2008) is met. In addition, the method is low in cost, raw materials are easy to obtain, secondary pollution is avoided, and the treatment method is simple. The simple and feasible method for stabilizing treatment on household refuse incineration fly ash is provided, a great obstacle of restraining the cleanliness development of waste incineration enterprises is eliminated, great environment benefits can be achieved, and obvious economic benefits and good social benefits can be achieved.

The invention discloses an oil-resistant acrylic rubber sealing pad for a transformer and a preparation method thereof. The oil-resistant acrylic rubber sealing pad is prepared by the following raw materials in parts by weight: 45-55 parts of acrylic rubber, 15-20 parts of epichlorohydrin rubber, 8-12 parts of fluorine rubber, 5-10 parts of modified sepiolite powder, 3-6 parts of zinc borate, 2-4 parts of antimonous oxide, 2-3 parts of 2-hydroxy imidazoline, 3-4 parts of chlorinated paraffin, 0.5-1.5 parts of magnesium oxide, 8-12 parts of organic bentonite, 3-5 parts of calcined loess, 1-2 parts of ethylene bis oleamide, 1-2 parts of calcium zinc stabilizer, 2-4 parts of sulfur, 3-4 parts of dioctyl maleate, 2-3 parts of trioctyl trimellitate, 1-2 parts of anti-aging agent ODA, 1-2 parts of anti-aging agent TPPD, 1-2 parts of accelerator CZ and 2-3 parts of accelerator ZDC (zinc diethyl dithiocarbamate). Acrylic rubber with excellent thermo-oxidative ageing resistance and oil resistance is used as main material and is mixed with epichlorohydrin rubber and fluorine rubber to improve such properties of the acrylic rubber as cold resistance, high temperature resistance, water resistance, tensile strength, and the like.

The invention discloses a modified rubber material. The modified rubber material contains the following raw materials: epoxidized natural rubber, polyurethane rubber, graphene, tributoxyethyl phosphate, adipate, tri(2,4-di-tert-butylphenyl)phosphite, stearyl acrylate, maleic anhydride graft, magnesium hydroxide, kaolin, glass micro-beads, calcium cetyl sulfonate, zinc diethyl dithiocarbamate, chlorinated polyethylene, isoprene, brominated paraffin, polyvinyl chloride fibers, simethicone, carbon fibers, polyamide fibers, carboxyethyl cellulose, a surfactant, an initiator, a chain extender, a cross-linker, a degasifier, a leveling agent, a catalyst, an accelerant, a plasticizer, a dispersant, a tackifier, a curing agent, an antibacterial agent, an antioxidant, a photostabilizer, a thermal stabilizer, an age resister, an ultraviolet absorbent, a flame retardant and a smoke suppressant. The material disclosed by the invention is good in flame-retardant effect, high in shock resistance and high in toughness, can be extensively applied to the manufacturing of products such as tires, rubber tubes, rubber belts and cables and has remarkable economic and social benefits.

The invention relates to a method for preparing SnS2 nano hexagonal tablets through high-temperature liquid phase by using an injection method. The method comprises the following steps: heating an organic solvent to 120-130 DEG C while stirring under the protection of nitrogen; then stably keeping 120-130 DEG C for 0.5-2 hours; heating to 200-360 DEG C; injecting a 0.02-1mol / L organic amine solution of tin diethyl dithiocarbamate precursor into the organic solvent, wherein the volume ratio of the tin precursor solution to the organic solvent is (1-5):3; naturally cooling down to room temperature after reacting for 2-60 minutes; and washing, and separating precipitate to obtain the SnS2 nano hexagonal tablets. The method is simple to operate and has no requirement for equipment; utilized solvents are all environment-friendly, and do not generate highly toxic substances; and the obtained product can be made into ink and used for printing solar cells, thereby being easy to implement large-scale production and having good application prospects.

The invention discloses an environment-friendly chemical nickel stripper and a deplating method thereof. Preferably, m-nitrobenzoic acid serves as an oxidizing agent for stripping a nickel-plated layer on an iron substrate; and since nitrate is generally stable in nature and low in toxicity, no waste gas or waste water is generated when the stripper provided by the invention is used, and the stripper does not corrode devices and has high affinity with the environment. Meanwhile, the stripper is further matched with diethyl dithiocarbamate and dodecyl sulfonate and combined with the deplating method thereof, the rate of stripping the nickel-plated layer on the iron substrate can be effectively increased, the nickel-plated layer can be stripped in a short time, and the production period is shortened. Compared with the prior art, the environment-friendly chemical nickel striper and the deplating method thereof have the advantages of being free of corrosion, poison gas and pollution, high in efficiency, environmentally friendly, easy and convenient to maintain and operate and the like.

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.

The invention relates to a dried material ratio of rubber latex for producing ultra-thin condoms and a sulfuration technology for preparing the rubber latex. The dried weight ratios are respectively as follows: 1.20 portions of sulfur, 0.70 portion of ZnO, 0.40 portion of zinc diethyl dithiocarbamate, 1.00 portion of 2, 6-bis-tert buty-4-methyl phenol, 0.08 portion of KOH, 0.25 portion of fatty alcohol polyoxyethylene (20) ether, 0.05 portion of sodium hexametaphosphate, 0.10 portion of sodium methylene dinaphthyl sulphonate, 100.00 portions of natural rubber and 3.00 portions to 5.00 portions of modified rubber latex. The sulfuration technology comprises 10 steps and can be used for the preparation of the rubber latex for producing the ultra-thin condoms. The rubber latex can be used for the production of ultra-thin and ultra ultra-thin condom products with the thickness of about 0.050mm. Under the premise of guaranteeing the strength quality and meeting the national and international standards, the products have excellent comfortableness when in use, can realize effective contraception and also more effectively prevent the spread of diseases, such as AIDS, gonorrhea and chancroid and the like.

The invention discloses a pre-dispersed master colloid for rubber vulcanization promotion, and a preparation method thereof. The pre-dispersed master colloid comprises, by mass, 20-30 parts of tellurium diethyl dithiocarbamate (TDEC), 30-50 parts of dipentamethylenethiuram tetrasulfide (DPTT), 3-10 parts of an inorganic filler, 5-10 parts of softened oil, 2-5 parts of a processing assistant and 5-40 parts of a rubber carrier. The preparation method of the pre-dispersed master colloid improves the dispersion of active components, and makes the master colloid be uniformly discharged and have smooth particles and good processability; and the master colloid effectively improves the mechanical performances of vulcanized rubber when the master colloid is used in preparation of rubber compounds.

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.