69 results about "Dibenzyl disulfide" patented technology

The present invention provides composite lithium-based lubricating grease and a preparation method thereof. The composite lithium-based lubricating grease consists of thickener, base oil and additive. The thickener consists of 12-hydroxy stearic acid lithium dibasic acid and/or lithium borate, and the mol ratio is 1 ®U 0.1 to 1 ®U 0.1to 1. The base oil is mineral oil or poly-alpha-olefin synthesis oil. The additive consists of organic amine compound antioxidant, benzotriazole and barium petroleum sulfonate or barium dinonylnaphthalene sulfonate anti-corrosion additive and rust protection agent, dialkyl dithiocarbamate or dibenzyl disulfide and sulfurized olefin cottonseed oil extreme pressure antiwear additive and nanometer copper powder repairing additive. The contents of the thickener and the base oil are respectively 6 percent to 18 percent and 82 percent to 94 percent according to the weight percentage. The lubricating grease has the multi-effect performances of high dripping point, good high-temperature performance and low-temperature performance, chemical invariability, colloid invariability, antiwear extreme pressure performance etc., and especially has the repairing function towards a damaged bearing.

The invention discloses a preparation method of a nitrogen, sulfur and phosphorus heteroatom-doped carbon material, and belongs to the technical field of carbon materials. The method comprises the following steps: adopting a perfluorocarbon material or a fluorinated carbon nanotube as a carbon substrate, doping one or more of liquid sources containing nitrogen, sulfur and phosphorus heteroatoms into the carbon substrate at the temperature of 400 to 800 DEG C by adopting a pyrolysis deposition method, or mixing a solid source containing the nitrogen, sulfur and phosphorus heteroatoms with the carbon substrate and grinding, and calcining at the temperature of 400 to 800 DEG C to realize doping, so as to obtain the nitrogen, sulfur and phosphorus heteroatom-doped carbon material. The liquid source contains pyridine, thiophene, triphenylphosphine solution and the like, and the solid source contains sublimed sulfur, dibenzyl disulfide and the like. The method has the advantage of simple operation and high universality; high-concentration vacancy is generated by utilizing the fluorinated carbon nanotubes to remove fluorine at high temperature, and further high-efficiency doping of heteroatom can be realized.

The invention discloses a lubricating grease composite used for a three-pin type constant-velocity universal joint of a vehicle transmission system. The lubricating grease comprises the following components based on 100 percent weight: (a) 78 to 83 percent of base oil, (b) 9 to 12 percent of composite lithium calcium soap thickener, (c) 0.5 to 2.0 percent of sulphide isobutene and/or an organic sulfide of dibenzyl disulfide, (d) 1.0 to 3.0 percent of zinc dialkyl dithiophosphates, (e) 0.5 to 2.5 percent of molybdenum dithio phosphate, (f) 0.5 to 3.0 percent of parathion-free nitrogen-containing boric acid ester, (g) 0.5 to 1.0 percent of amine or phenolic antioxygen, and (h) 1.0 to 2.0 percent of dinonyl naphthalene sulfonic acid barium antirusting agent. The composite has a low friction coefficient, low abrasion resistance and high extreme pressure property, can reduce or prevent noise, vibration and harshness (NVH), and is particularly suitable to be used for lubricating the three-pin type constant-velocity universal joint of a vehicle transmission shaft.

The invention discloses a method for producing thionocarbamate and dibenzyl disulfide. The method comprises the following steps: carrying out an esterification reaction on alkyl xanthate and benzyl halide to obtain alkyl benzyl xanthate; carrying out an aminolysis reaction on the alkyl benzyl xanthate and fatty amine to obtain a thionocarbamate and benzyl mercaptan mixture; and carrying out an oxidation reaction on the thionocarbamate and benzyl mercaptan mixture and hydrogen peroxide, and carrying out liquid-solid separation to obtain a solid which is the dibenzyl disulfide product and a liquid, and allowing the liquid to stand for oil and water layering in order to obtain an oil phase which is the thionocarbamate product. The dibenzyl disulfide product and thionocarbamate product obtained through the method have high yield and high purity, and the method has the advantages of easiness in separation of the products in the preparation process, environmental protection, high atom economy property, low production cost, and easiness in realization of industrial production.

The invention provides a preparation method of an adsorbent for removing dibenzyl disulfide in insulation oil, and relates to the field of the preparation method of the adsorbent. The method aims at solving the technical problems that in the prior art, due to the corrosion of corrosive sulfur (the dibenzyl disulfide is the major corrosive sulfur) in the insulation oil on transformer winding copperwires, transformer faults frequently occur, and serious harm is caused on the power grid safety. The method comprises the following steps of 1, preparing a lanthanum modified molecular sieve; 2, preparing a copper carrying lanthanum modified molecular sieve; 3, compounding the copper carrying lanthanum modified molecular sieve by a nickel nitrate solution, and performing drying and roasting. Theadsorbent has a strong selectivity absorption effect on the dibenzyl disulfide in the insulation oil; the removal rate is high; the quality of the insulation oil is effectively improved. The preparedadsorbent is used for removing the corrosive sulfide in the product oil.

The invention relates to a lubricating oil additive, which is prepared from the following raw materials by weight: 8-14 parts of sulfur phosphorus primary-secondary alkyl zinc salt, 3-10 parts of sulfurized isobutylene, 4-8 parts of glycerol acrylate, 3-7 parts of isooctyl phosphate, 2-7 parts of methyl silicone oil, 3-5 parts of calcium stearate, 6-8 parts of a butene adhesion agent, 3-9 parts of a dibenzyl disulfide, 1-5 parts of dibutyl phosphite, 4-7 parts of dodecylbenzene, 1-5 parts of diethanolamine, and 6-8 parts of carbon tetrachloride. The lubricating oil additive of the present invention has following beneficial effects of improvement of the lubricating effect and the washing effect of the lubricating oil, anti-oxidation and wide use.

The invention discloses novel extreme-pressure (EP) gear oil, which comprises the following components in parts by weight: 30 to 45 parts of 100# mechanical oil, 40 to 50 parts of 38# cylinder oil, 0.1 to 1.0 part of BHT (butylated hydroxytoluene) antioxidant, 0.1 to 0.7 part of dibutyl phosphate, 1.0 to 2.0 parts of sulfur-phosphorous butyl octanol zinc salt, 0.2 to 0.8 part of alkenyl dibutyric acid, 0.2 to 0.9 part of demulsifying agent, 1.5 to 3.5 parts of dibenzyl disulphide, 10*10 to 6 parts of methyl silicone oil and 0.5 to 1.0 part of alkyl naphthalene. The EP gear oil has the advantages of the energy-conservation effect superior to the conventional product can be reached by fully reducing the friction; the EP gear oil has no toxin or harm to a human body and can reach the safety and environment protection requirements at high standards; the EP gear oil has good thermal oxidative stability and excellent rust protection and corrosion protection action; the service life of gears can be effectively prolonged; strong load or large load impact can be stood; the abrasion or the sintering of the gears can be prevented; and the EP gear oil is used for various industrial equipment working under the severe conditions of the heavy load or the impact load and high temperature.

The invention relates to an acid-soluble pressure-bearing plugging agent for drilling fluid and a preparation method. The acid-soluble pressure-bearing plugging agent contains a friction material, a bridging material, a filler material, iron tailing sand, volcanic ash powder, woody activated carbon powder, nano calcium-zinc phosphate, paraffin, polyalcohol fatty acid ester, titanium white, red clay, alginic acid, dimethyl diallyl ammonium chloride, polyvinyl acetate, glyceryl monostearate, a glued stone cementing material, copper oxide, Dibenzyl disulfide, alpha-n-octyl-cyanoacrylate, sodium caseinate, steel slag, white carbon black, dolomite powder, manganese dioxide, diatomite, dibutyl phthalate, polyvinyl alcohol, tert-butylhydroquinone, phthalic anhydride and H2O. According to the acid-soluble pressure-bearing plugging agent for the drilling fluid and the preparation method, by using the preparation method, the defects in the prior art that on-site operating methods are tedious, operating requirements are strict, plugging performance is often poor due to invasion of surrounding solid-state particulate matters, a plugging framework is damaged, and a motor shaft or rotating shaft is subjected to expanding and contracting under the action of stress of the shaft during rotating due to infirm connection are avoided.

The invention discloses a detection method of corrosive sulfur and an antioxidant in insulating oil. The detection method adopts gas chromatography detection, and comprises the following steps of (1) standard solution preparation, (2) sample pretreatment and (3) determination. The method for accurately and quantitatively determining dibenzyl disulfide (DBDS) in the insulating oil via a gas chromatography-electron capture detector (GC-ECD) is established, and the GC-ECD method has a good quantitative detection effect on 2,6-di-tert-butyl-4-methylphenol (T501) in the insulating oil. The method can simultaneously determine DBDS and T501 in the insulating oil via one sample injection.

The invention provides a water soluble plastic packaging bag, and a preparation method thereof. The water soluble plastic packaging bag comprises, by weight, 10 to 40 parts of polyethylene, 10 to 30 parts of soybean starch, 5 to 20 parts of a plasticizer, 6 to 15 parts of zinc oxide, 1 to 5 parts of pine tar, 8 to 18 parts of allethrin, 5 to 10 parts of dibenzyl disulfide, 8 to 20 parts of salicylic acid, 3 to 8 parts of a surfactant, 5 to 12 parts of an antitack agent, 6 to 15 parts of polyoxyethylene ether, 2 to 10 parts of a pH conditioning agent, and 5 to 13 parts of an antiseptic. The water soluble plastic packaging bag is capable of dissolving in water completely; no harmful substance is generated; the water soluble plastic packaging bag is degradable, is friendly to the environment, is safe, and can be degraded in soil rapidly; the surrounding environment is not influenced; heat resistance is excellent; the water soluble plastic packaging bag is harmless for packaged products, is capable of prolonging product self life; heat stable time is 40min or longer at 180 DEG C; and damage is not easily caused.

The invention discloses special lubricating grease for a low-speed motor bearing and a preparation method of the special lubricating grease, belonging to the technical field of special lubricating grease for low-speed motor bearings. The technical scheme has the key points as follows: the special lubricating grease for the low-speed motor bearing is prepared from the following raw materials in parts by weight: 60 parts of dodecahydroxyl stearic acid, 40 parts of stearic acid, 38 parts of lithium hydrate, 3 parts of calcium hydroxide, 10 parts of azelaic acid, 10 parts of sebacic acid, 10 parts of benzyl disulfide T322 additives, 5 parts of T406 additives and 108 parts of base oil. The invention concretely discloses the preparation method of the special lubricating grease for the low-speed motor bearing. By using the special lubricating grease for the low-speed motor bearing, disclosed by the invention, the service life of the low-speed motor bearing is prolonged, meanwhile, the starting load of a low-speed motor is reduced, the low-speed motor can stably work for a long term, the production efficiency of an enterprise is increased, and the production cost of the enterprise is reduced.

The invention discloses lubricating oil for gearboxes and a preparation method thereof. The lubricating oil for gearboxes is prepared by: adding antimony oxide, cerium oxide, neodymium oxide and lanthanum oxide into a grinder, grinding and mixing well, adding glycerin, and ultrasonically dispersing for 5-10 min to obtain mixture A; adding tetraethyl silicate and n-phenyliminodiacetic acid, and stirring to allow reaction at 90-100 DEG C for 30-40 min to obtain mixture B; mixing 5-amino-2-benzimidazolinone, dibenzyl disulfide, tricresyl phosphate, sorbitol and 2,6-di-tert-butyl-p-cresol, and stirring to allow reaction at 60-80 DEG C for 20-30 min to obtain mixture C; adding the mixture A, the mixture B and the mixture C into basic oil, performing intensive shear stirring at 180-200 DEG C for 0.5-1 h, continuously heating to 250-280 DEG C, and performing shear stirring for 1-2 h; cooling to 120-140 DEG C, continuously performing shear stirring for 2-3 h, and cooling to obtain the lubricating oil for gearboxes.

The invention provides an extreme-pressure antiwear additive, relating to the technical field of antiwear additives. The extreme-pressure antiwear additive is composed of the following components in percentage by mass: 1-10% of silicon powder, 0.5-5% of magnesium oxide, 20-70% of aluminum powder, 0.5-5% of phosphate, 0.1-1% of nickel powder, 0.1-1% of dibenzyl disulfide, 1-5% of molybdenum naphthenate and 5-20% of molybdenum disulfide. The extreme-pressure antiwear additive can increase the surface hardness of the part to enhance the wear resistance, and can also repair the generated abrasion defect to prolong the service life of the friction part.

The invention discloses an adsorbent for normal-temperature removing of dibenzyl disulfide in transformer oil and a method. The method comprises the steps that first, silver nitrate is dissolved intodeionized water, a porous carrier is added, and ultrasound treatment is conducted till carrier particles are evenly dispersed; second, raw materials prepared in the first step are placed into a planetary stirrer to be stirred, so that the raw materials are mixed evenly; third, slurry obtained in the second step is dried; and fourth, a dried sample is ground and then sieved through a sieve, and thus the adsorbent with uniform particles is obtained. The adsorption capacity of the prepared adsorbent to the dibenzyl disulfide at the normal temperature is higher than 50 mg/g, the removal rate is higher than 95%, and the performance of the adsorbent is much higher than that of traditional adsorption materials such as activated carbon and activated clay. The adsorbent is simple in preparation process, has the high efficiency of removing dibenzyl disulfide in the transformer oil and has potential application prospects in the field of transformer oil purification.

An antiwear self-repairing lubricating oil additive is composed of the following components in parts by mass: 10-22 parts of molybdenum diisooctyl dithiophosphate, 18-28 parts of triphenyl phosphate,15-20 parts of an antiwear agent and 10-30 parts of an antioxidant. With use of special antiwear agent components, the antiwear agent composed of sulfurized isobutylene, dibenzyl disulfide, di-n-butylphosphite, sodium metaborate, and a potassium metaborate material is added into lubricating oil, the lubricating oil is subjected to a chemical reaction with a metal surface, and a chemical reactionfilm is produced, so a lubricating effect is played, scratching of the metal surface is prevented, even fusion welding is prevented, the self lubricating performance of the lubricating oil is greatlyimproved, and the antiwear self-repairing effect is good. With special preparation of the multi-component antioxidant, the antiwear self-repairing lubricating oil additive has excellent anti-aging andanti-oxidation performance, is added into the lubricating oil, can highly delay the service life of the lubricating oil and improves the practical performance.

A high-performance lubricating oil additive is composed of the following raw materials in parts by weight: 7 to 9 parts of di-tert-butyl-p-cresol, 8 to 11 parts of dibenzyl disulfide, 4 to 7 parts of polyisobutene barium salt, 5 to 8 parts of N,N-dimethyl formamide, 1.2 to 4 parts of glycerol acrylate, 6 to 10 parts of dibutyl phosphite, 9 to 12 parts of zinc dialkyl dithiophosphates-T206, 2 to 4 parts of methyl silicone oil, 7 to 11 parts of perfluorononyl ethyl benzene, 6 to 10 parts of amino thioester, 3 to 5 parts of phosphorous acid, 7 to 10 parts of zinc dialkyl dithiophosphates-T204, and 7 to 8.5 parts of dimethyl silicone oil. The provided lubricating oil additive has a high efficient comprehensive performance, is capable of improving the viscosity coefficient of lubricating oil, and improves the cooling and lubricating performances of lubricating oil at the same time.

A reverse-phase high-performance liquid chromatography method for the determination of dibenzyl disulfide content in insulating oil. The invention relates to a method for measuring the content of dibenzyl disulfide in insulating oil. The purpose of the invention is to solve the problems of high cost and limited application of the existing gas chromatography-mass spectrometry method for determining the content of DBDS in insulating oil. Methods: 1. Preparation of stock solution; 2. Preparation of calibration solution; 3. Preparation of solid phase extraction adsorption column; 4. Preparation of sample solution; 5. Sample analysis; 6. Establishment of calibration curve; 7. Insulation to be tested Determination of dibenzyl disulfide content in oil. The method of the invention utilizes a relatively cheap liquid chromatograph to realize the determination of the dibenzyl disulfide content in the insulating oil, and the method is simple in operation, high in repeatability and accuracy, low in instrument equipment price, and easy to implement.

Provided is a diagnosis method for an oil-filled electrical apparatus, which is for evaluating the degree of danger of copper sulfide being generated within the oil-filled electrical apparatus, comprising: a first step for detecting a specific compound contained within insulating oil inside the oil-filled electrical apparatus; a second step for evaluating the possibility of copper sulfide being generated inside the oil-filled electrical apparatus, on the basis of the result detected by the first step; and a third step for diagnosing the degree of danger of a malfunction occurring in the oil-filled electrical apparatus, on the basis of the evaluation result obtained in the second step. The specific compound contains dibenzyl disulfide and/or a reaction product of a radical resulting from dibenzyl disulfide, and di-tert-butyl-p-cresol and/or a reaction product of a radical resulting from di-tert-butyl-p-cresol, or, di-tert-butyl-phenol and/or a reaction product of a radical resulting from di-tert-butyl-phenol.

The invention provides a preparation method of a carbon nanofiber-based electrocatalyst. The preparation method comprises the following steps: dispersing candle ash in an organic solvent, adding a high-molecular polymer and dibenzyl disulfide, stirring, adding a cobalt salt and a nickel salt, and continuing stirring to obtain a precursor solution; carrying out electrostatic spinning on the precursor solution, collecting a fiber precursor, and drying; and carrying out air burning on the dried fiber precursor at 150-300 DEG C for 1-3 hours, and then carrying out high-temperature carbonization inan inert atmosphere to obtain the carbon nanofiber-based electrocatalyst. The carbon nanofiber-based electrocatalyst prepared by the method has excellent electrocatalytic performance and cycling stability.

The invention discloses a few-layer ReS2 nanosheet @ MoS2 quantum dot composite photocatalyst, and a preparation method thereof. The preparation method mainly comprises following steps: 1, ball milling is carried out to prepare ReS2; 2, ReS2 powder is dispersed in a solvent such as ethanl for ultrasonic peeling; 3, an obtained ultrasonic dispersed solution is subjected to centrifugalization, a product is collected, washed, and freeze-dried so as to obtain few-layer ReS2 nanosheet; 4, sodium molybdate dihydrate and dibenzyl disulfide are ultrasonically dispersed in deionized water and ethanol respectively, obtained two suspensions are introduced into an autoclave for hydrothermal treatment, and at last, an obtained corresponding product is subjected to centrifugalization to obtain MoS2QDs supernatant layer; and 5, the prepared MoS2QDs and the ReS2 nanosheet are subjected to second hydrothermal compounding so as to obtain the few-layer ReS2 nanosheet @ MoS2 quantum dot composite photocatalyst. The few-layer ReS2 nanosheet @ MoS2 quantum dot composite photocatalyst prepared through the preparation method is excellent in performance, simple in operation and high in application value.

The invention provides a strong-efficient wear-resistant cable sheath and a preparation method thereof, and relates to the technical field of the cable production. The cable sheath is prepared by the following raw materials in parts by weight: 40-50 parts of butadiene rubber, 15-20 parts of isoprene rubber, 10-15 parts of ethylene propylene rubber, 8-12 parts of vulcanized neopentyl glycol dioleate, 1-2 parts of a modifier, 6-8 parts of dibenzyl disulfide, 3-5 parts of 2,5-dimercaptothiazole, 5-7 parts of thiophosphate isobutylene, 2-4 parts of potassium metaborate, 4-6 parts of zinc thiocarbonate, 2-4 parts of iron sulfide, 3-5 parts of molybdenum nitride, 2-4 parts of a dispersant, and 2-4 parts of a vulcanizing agent. The strong-efficient wear-resistant cable sheath is capable of overcoming deficiency of the prior art, effectively improving a wear-resistant property of the cable sheath, preventing the cable from being damaged by trampling of people, and even causing an electric shock risk because an internal lead is exposed. The cable sheath is excellent in whole performance, high in safety, long in service life, and suitable for popularization.

The invention belongs to the field of nano material preparation and antibiosis, and relates to a titanium dioxide nanotube/molybdenum disulfide nanoflower compound as well as a preparation method and application thereof. The titanium dioxide nanotube/molybdenum disulfide nanoflower compound is prepared by placing titanium dioxide nanotubes in an ethanol mixed solution containing dibenzyl disulfide and sodium molybdate and performing a solvothermal reaction. The molybdenum disulfide nanoflowers are loaded on the surfaces of the titanium dioxide nanotubes, the average size of the titanium dioxide nanotubes is 75 +/-5nm, and the average size of the molybdenum disulfide nanoflowers is 230 +/-20nm. The compound has visible light photocatalysis and peroxidase-like activity at the same time, so that the compound is applied to resisting bacteria and promoting wound healing based on the synergistic effect of the visible light photocatalysis and peroxidase-like activity. The compound is a nano biomimetic material, and the preparation method is ingenious in conception, simple in preparation process, green, environmentally-friendly, rich in raw material and low in cost. The antibacterial mode is novel, visible light is a main component of sunlight, and the visible light is fully utilized to perform photocatalysis to enhance the enzyme-like activity. The application environment and biocompatibility are good, and the market prospect is wide.