24 results about "Thiophosphoric acid" patented technology

A novel bis-ligand chalcopyrite collector and a preparation method and application thereof. The collector is prepared by first synthesizing an intermediate oxalyl diisothiocyanate from oxalyl chloride and thiocyanate, and then reacting the intermediate with an amine or an alcohol using a one-pot method. The collector provided by the present disclosure can form more stable dual-site adsorption on the chalcopyrite surface, thereby generating a more stable double-chelate-ring structure than the single-site adsorption of a traditional chalcopyrite collector such as xanthate and dithiophosphate. The collector not only has higher collection ability and excellent selectivity, but also can achieve efficient copper-sulfur separation even under a low-alkalinity condition. The preparation process of the collector is simple and operable, facilitating the flotation of chalcopyrite and its separation from pyrite.

This invention belongs to the field of biomedicine, specifically relating to the development and application of oligonucleotide drugs targeting the key assembly proteins G3BP1 / 2 of stress granules. The oligonucleotides in these drugs are all composed of 20 bases, with 5 bases at each end modified with 2'-O-methoxyethyl, and 10 consecutive ordinary bases in the middle to ensure targeting specificity. Simultaneously, the entire nucleic acid chain is modified with thiophosphorylation. The oligonucleotide molecules disclosed in this invention possess targeting specificity, high molecular activity, and in vivo metabolic stability, providing research directions and candidate drugs for clinical targeting of stress granules and improvement of neurodegenerative diseases such as ALS.

The present application relates to the technical field of lubricating grease, in particular to a lubricating grease composition for angle grinder and a preparation method thereof. The present application provides a lubricating grease composition for angle grinder, which comprises base oil, thickening agent and additive, wherein the additive comprises extreme pressure anti-wear agent, and the extreme pressure anti-wear agent comprises molybdenum-containing extreme pressure anti-wear agent, amino thioester extreme pressure anti-wear agent and zinc thiophosphate salt extreme pressure anti-wear agent with a mass ratio of (1.5-4):(0.5-2):(1-3). The present application effectively reduces the wear of gears when used in angle grinder through the selection and specific compounding of extreme pressure anti-wear agent, and at the same time can prolong the service life of angle grinder, meeting the lubrication requirements of angle grinder gears. The present application is matched with suitable base oil and thickening agent system, and the obtained lubricating grease composition can play excellent adhesion performance under high speed working conditions of angle grinder, reducing the risk of grease leakage of angle grinder while ensuring lubricity.

The present application relates to fine chemical technology field, especially to a kind of anti-micro pitting additive and its preparation and application.The present application uses starch masking method, uses hydroxylated boron nitride and O, O-dialkyl thiophosphoryl chloride to carry out chemical reaction to prepare this anti-micro pitting additive, and the core skeleton is hexagonal boron nitride nanosheet, one side contains hydroxyl functional group, the other side is covalently connected O, O-dialkyl thiophosphate, and the process condition used is mild;The anti-micro pitting additive prepared by the present application can be used as multifunctional lubricant additive, utilizes the filling and interlayer slip of boron nitride nanosheet, the chemical adsorption of hydroxyl surface and friction pair, the tribological chemical reaction of O, O-dialkyl thiophosphate and friction pair synergistic effect, obtains good extreme pressure, antiwear, anti-micro pitting and anticorrosion etc., suitable for long-acting stable friction and micro pitting lubrication protection under harsh working conditions.

This invention discloses a graded purification method for wet-process phosphoric acid, relating to the field of phosphoric acid chemical industry. The method includes the following steps: S100, adding an inorganic precipitant to wet-process phosphoric acid to carry out a main precipitation reaction; S200, adding active seed crystals to the material obtained in step S100 to carry out a seed-induced interface activation reaction; S300, adding an organic complexing agent to the material obtained in step S200 to carry out a complexation reaction; S400, adding a flocculant to the material obtained in step S300, and obtaining purified phosphoric acid through solid-liquid separation; wherein the inorganic precipitant is a diatomaceous earth-based composite precipitant modified with phytic acid and ionic liquid; and the organic complexing agent is a mixture of dithiophosphate compounds and hydroxyquinoline compounds. This invention achieves a removal rate of over 85% for major impurities such as iron, aluminum, and magnesium, and a removal rate of over 95% for trace heavy metals such as arsenic, cadmium, and lead, with a phosphorus yield of over 96.5%, by constructing a four-stage synergistic system of main precipitation-seed activation-deep complexation-flocculation enhancement.

This invention relates to a method for determining the content of (4-tert-butylphenyl)diphenyl thiophosphate in hydraulic oil, lubricants, and greases, comprising the following steps: 1) Sample pretreatment: mixing the liquid sample and setting aside; 2) Sample extraction: ultrasonically extracting the pretreated sample using a 1:1 solvent of hexane and dichloromethane; 3) determining the concentration of (4-tert-butylphenyl)diphenyl thiophosphate in the sample extraction solution obtained in step 2) using GC-MS; 4) calculating the content of (4-tert-butylphenyl)diphenyl thiophosphate in the sample based on the concentration of (4-tert-butylphenyl)diphenyl thiophosphate in the sample extraction solution obtained in step 3). This invention is not only rapid and simple to use, but also enables accurate determination of the content of (4-tert-butylphenyl)diphenyl thiophosphate, solving the problem of determining the content of (4-tert-butylphenyl)diphenyl thiophosphate.

This invention relates to the field of chemical materials for oil drilling operations, and discloses a lubricant comprising base oil, zinc dialkyl dithiophosphate, alkylbenzene sulfonate, C16-C20 unsaturated fatty acids, and an antifoaming agent; wherein, relative to 8g of base oil, the content of zinc dialkyl dithiophosphate is 5-8g, the content of alkylbenzene sulfonate is 0.6-1g, and the content of C16-C20 unsaturated fatty acids is 0.2-0.5g. The lubricant prepared by the method of this invention exhibits excellent lubrication performance, low foaming rate, and good durability when used in drilling fluids.

Lubricant compositions may provide corrosion resistance, oxidation resistance, and reduced wear for hydraulic systems. A lubricant composition may comprise an ashless dithiophosphate in an amount sufficient to provide a concentration of phosphorus ranging from 10 ppm to 250 ppm to the lubricant composition, a metal dialkyl dithiophosphate such as zinc dialkyl dithiophosphate (ZDDP) in an amount sufficient to provide a concentration of phosphorus ranging from 50 ppm to 1000 ppm to the lubricant composition, a corrosion inhibitor comprising an alkyltriazole derivative in an amount sufficient to provide a concentration of nitrogen ranging from 0.75 ppm to 100 ppm to the lubricant composition, and a major amount of a base oil.

The application provides an oligonucleotide-thiophosphonate compound shown in formula I and a synthesis method thereof, the synthesis method is as follows: taking an oligonucleotide-thiol compound shown in formula III and a phosphonate compound shown in formula II as raw materials, reacting in a solvent to obtain the oligonucleotide-thiophosphonate compound shown in formula I. The method has small damage to DNA, good universality, simple operation, mild conditions and can obtain the oligonucleotide-thiophosphonate compound in high yield, and provides a new method for expanding and enriching a DELT compound library.

This invention relates to the field of mineral processing technology, and discloses a copper sulfide ore beneficiation reagent, its preparation method, and its application. The reagent is composed of 50-55 parts by weight of sodium dibutyl monothiophosphate, 20-25 parts by weight of sodium isobutyl xanthate, 10-15 parts by weight of modified mercaptothiocyanate, and 5-10 parts by weight of fusel oil. The modified mercaptothiocyanate is obtained by chemically modifying the molecular structure of conventional mercaptothiocyanates by introducing hydrophobic alkyl groups and / or sulfur-containing functional groups. The fusel oil is a mixture of C4-C8 fatty alcohols. The preparation method includes: weighing the raw materials; mixing and dissolving sodium dibutyl monothiophosphate and sodium isobutyl xanthate to obtain a mixed solution; adding the modified mercaptothiocyanate and stirring to obtain a reaction solution; adding the fusel oil, stirring, separating the liquid to obtain an oily liquid, and filtering to obtain the reagent. The mass ratio of the oily liquid to the mixed solution after separation is (20-80):(80-20), and the filtration time is 30-60 min. The reagent of this invention can be used in the flotation of copper sulfide ore, with a dosage of 60-120 g / t.

This invention discloses a flotation separation method for collecting galena and inhibiting sphalerite and pyrite, achieving efficient separation of galena from sphalerite and pyrite in a low-alkaline pulp environment, belonging to the field of mineral beneficiation technology. This invention uses N-hydroxyethylethylenediaminetriacetic acid as an inhibitor of sphalerite and pyrite at a low alkalinity of pH 7.5-9.5, and one or two of sodium diethyldithiocarbamate, sodium ethyl xanthate, and xylenol dithiophosphate as collectors for galena. Under low dosage conditions, it achieves simultaneous inhibition of sphalerite and pyrite and effective collection of galena, offering advantages of high efficiency, simple process, economy, and environmental friendliness. It is particularly suitable for silver-bearing, high-sulfur, low-grade lead-zinc ores and has broad application prospects.

The application discloses a fluorescent gas sensing material, a preparation method thereof and application thereof in monitoring chlorinated volatile organic compounds, and belongs to the technical field of gas sensor materials. The fluorescent gas sensing material comprises a copper cluster-based metal organic framework material, and a chemical formula of the copper cluster-based metal organic framework material is {[Cu3I3(TPSA)]·CH3CN} n ; wherein TPSA represents N,N',N"-tris(3-pyridyl)thiophosphoric triamide. The application synthesizes the copper cluster-based metal organic framework with cyan fluorescence by a solvothermal method, and realizes rapid and sensitive detection of CH2Cl2, CHCl3 and 1,2-DCE steam by taking the copper cluster-based metal organic framework as a fluorescent gas sensing material. Among them, the detection of dichloromethane steam is the most sensitive and rapid, the minimum detection limit is 0.4 Pa (3.7 ppm), and the response time is 10 s.

The application relates to the technical field of batteries, in particular to an electrolyte and a battery; the electrolyte comprises an organic solvent, a lithium salt and an additive, the additive comprises a first additive; the first additive comprises a silicon-based sulfonate compound and a thiophosphate compound, the silicon-based sulfonate compound has a structure shown in formula I, and the thiophosphate compound has a structure shown in formula II: formula I; formula II. Compared with the prior art, the application adds the additive containing the silicon-based sulfonate compound and the thiophosphate compound, improves the stability and ion conductivity of an interface film, and significantly improves the cycle life, high-temperature performance and low-temperature performance of a high-voltage lithium ion battery.

This invention discloses a zinc-containing hydraulic oil composition, which, by weight percentage, comprises the following components: 0.4-0.8 wt% zinc dialkyl dithiophosphate, 0.2-0.5 wt% bisphenol antioxidant, 0.1-0.25 wt% auxiliary antioxidant, 0.2-0.5 wt% ionic liquid, 0.02-0.05 wt% rust inhibitor, 0.01-0.02 wt% demulsifier, 0.01-0.02 wt% antifoaming agent, 1-5 wt% ester base oil, and the balance being mineral base oil. The zinc-containing hydraulic oil composition disclosed in this invention employs a three-antioxidant system, an azo ethyl sulfate ionic liquid, and a polyester compound system, providing effective corrosion and anti-wear protection for metals. It possesses advantages such as antioxidant properties, low sludge content, and good compatibility with other additives. Through the mutual compatibility of various additives, it exhibits excellent anti-wear properties, rust prevention, demulsification properties, thermal stability, and hydrolytic stability, meeting the stringent operating requirements of high-temperature and high-pressure hydraulic oil systems.

This invention provides a gasoline engine lubricating oil composition and its preparation method. The gasoline engine lubricating oil composition of this invention comprises the following components: (A) a nitrogen-containing organoboron compound; (B) an alkyl diphenylamine; (C) polyisobutylene succinimide; (D) a sulfonate and / or a sulfurized alkylphenol salt; (E) zinc dihydrodithiophosphate; (F) an organomolybdenum compound; (G) an ethylene-propylene copolymer; and (H) a base oil in a major amount. The structure of the nitrogen-containing organoboron compound is shown in formula (I) and / or formula (II), with the definitions of each group provided in the specification. The gasoline engine lubricating oil composition of this invention exhibits excellent antioxidant, detergency, and dispersing properties, while also demonstrating good anti-wear properties under extreme pressure and lean-oil friction conditions, effectively suppressing engine wear caused by frequent start-stop cycles in hybrid electric vehicles.

This invention relates to a large-size copper-doped manganese thiophosphate single crystal and its preparation method, wherein the single crystal has the chemical formula Cu. x Mn y P2S6, where 0

This invention relates to a method for reducing abnormal combustion events during engine operation of a hydrogen-fired internal combustion engine (HICE). The method includes the steps of: a) providing the HICE with a lubricating oil composition comprising or a mixture of the following components: i) a base oil having a viscosity KV100 of less than or equal to 12 cSt and comprising more than 50% by weight of the composition, and containing Group I, Group II, Group III, Group IV base oils, or combinations thereof; ii) a super-alkaline magnesium detergent comprising super-alkaline magnesium salicylate, super-alkaline magnesium sulfonate, super-alkaline magnesium phenolate, or combinations thereof, having a total base number (KOH / g) greater than or equal to 9 and less than or equal to 500, and containing at a treatment level providing total magnesium between 100 and 5000 ppm by weight; iii) The super-alkaline metal-containing detergent comprises a super-alkaline metal salicylate detergent, a super-alkaline metal phenolate detergent, or a combination thereof, having a total base number (KOH / g) greater than or equal to 9 and less than or equal to 500 and containing at a treatment level providing a total metal content between 100 and 5000 ppm by weight; and wherein the super-alkaline magnesium-containing detergent of ii) and the super-alkaline metal-containing detergent of iii) together provide the composition with a total soap content between 0.15% by weight and 8.0% by weight; iv) at least one dialkyl dithiophosphate zinc compound containing at a treatment level providing the composition with a zinc content greater than 100 ppm by weight and a phosphorus content less than 800 ppm by weight; v) at least one molybdenum-containing compound containing at a treatment level providing the composition with a total molybdenum content between 20 and 2000 ppm by weight; vi) at least one silicon-containing compound containing at a treatment level providing the composition with a total silicon content between 5 and 1000 ppm by weight; and vii) The lubricating oil composition has a total sulfate ash content of less than or equal to 2.0% by weight, a total phosphorus level of less than or equal to 800 ppm by weight, and an SAE viscosity grade of 25W-X, 20W-X, 15W-X, 10W-X, 5W-X, or 0W-X, where X represents any one of 8, 12, 16, 20, 30, 40, 50, or 60; b) supplying hydrogen-containing fuel to the HICE; and c) burning the fuel in the HICE. Lubricating oil compositions and concentrates for reducing the tendency for abnormal combustion events in HICE are also provided.

The application discloses a solution to the forming cracking of high-chromium ferrite stainless steel 820 plate type, which comprises the following steps: adjusting the forming roll gap to 1.3-1.6 times of the thickness of the plate to compensate for the elastic recovery of the material; adopting water-based emulsion lubrication (water-oil ratio 95:5-90:10, containing 0.1%-0.5% thiophosphate) or pasting a 50-80-micron polymer protective film for protection; and controlling the forming line speed to be less than or equal to 30 m / min. Through the synergistic regulation of the forming parameters and the protection process, the application solves the cracking problem of the high-chromium ferrite stainless steel caused by work hardening, friction stress and strain concentration. The method can reduce the cracking rate from 30% to less than 1%, optimizes the surface roughness Ra value to 0.3-0.5 microns, and improves the production line comprehensive efficiency by 15%, and is suitable for the industrialized production of 820 corrugated plates for building roofs.

This invention belongs to the field of biotechnology and relates to a nucleoside monomer chemically modified with exogenous functional groups and a covalent nucleic acid aptamer containing the same nucleoside monomer. The nucleoside monomer contains exogenous functional group chemical modifications, including deoxyuridine phosphorimide and phosphate thioester modifications; the nucleoside monomer includes Sgc8c; the base sequence of Sgc8c is shown in SEQ ID No. 1. Based on the existing nucleic acid aptamer Sgc8c that binds to PTK7, it is chemically modified into a covalent aptamer. A covalent aptamer is an aptamer modified with a covalently reactive target that can specifically bind to a target protein and undergo a proximity-mediated covalent reaction to form a covalent complex. The covalent aptamer can convert the non-covalent complex of a conventional aptamer with a target protein into a covalent complex, thereby preventing rapid dissociation and withstanding various environmental stresses, thus exerting a long-term and stable biological function.

This invention relates to a method for deep removal of heavy metals in a wet-process phosphoric acid process, comprising the following steps: (1) using a straight-chain or branched alcohol as a raw material, reacting it with phosphorus pentasulfide to obtain dialkyl dithiophosphate, and then reacting it with metal oxides, hydroxides or salts to synthesize dialkyl dithiophosphate (DDP); (2) reacting the DDP with one or more of the following: phosphoric acid slurry containing heavy metals, dilute phosphoric acid, concentrated phosphoric acid, and residual acid from phosphoric acid purification, to generate a heavy metal complex precipitate. After the reaction is complete, the purified phosphoric acid is separated to achieve the removal of heavy metals. This method has low raw material costs, and the cadmium content after heavy metal removal of phosphoric acid is ≤2ppm with a removal rate ≥96%; the copper content is ≤0.5ppm with a removal rate ≥99.5%; the arsenic content is ≤5ppm with a removal rate ≥70%; phosphorus loss is ≤0.5%; no reducing agent is required, thus avoiding hydrogen generation; it has little impact on the decrease in phosphoric acid concentration; and no H2S is generated. It is suitable for the removal of heavy metals from wet-process phosphoric acid slurry, dilute phosphoric acid, concentrated phosphoric acid, and other systems, and can be directly integrated into existing production lines.