18 results about "Dithiophosphoric acid" patented technology

This invention belongs to the field of mineral flotation technology, and discloses a flotation collector for non-ferrous metal sulfide ores, its preparation method, and its application. The collector uses O,O-dialkyldithiophosphate as a starting material, and reacts sequentially with a halocarboxylic acid ester, hydrazine hydrate, potassium hydroxide, and carbon disulfide in anhydrous ethanol in a three-step reaction to obtain the target product, O,O-dialkyldithiophosphate hydrazide-N′-dithiocarbamate potassium. Its molecular structure simultaneously contains three active groups: a dithiophosphate group, an hydrazide group, and a dithiocarbamate group. This invention achieves efficient process connection and smooth transition by optimizing the material ratio, temperature, and time of each reaction step, and has advantages such as mild reaction conditions, simple operation, few side reactions, high yield, and stable product. The prepared collector exhibits excellent collecting performance and good selectivity for non-ferrous metal sulfide ores such as chalcopyrite, and is suitable for widespread application in sulfide ore flotation processes.

The present application relates to a kind of low sulfur high performance fuel oil production device, it relates to fuel oil production technical field.Low sulfur modified residual oil, hydrogenation low sulfur raffinate are used as main raw material, auxiliary agent A, auxiliary agent B prepared by special oil device are matched, reaction conditions are accurately controlled through DCS system, low sulfur high performance marine fuel oil is prepared in low temperature mild environment;Device integrates vacuum deep pull and viscosity reduction cracking combined process, light fraction can be deep-processed into three kinds of base oil, etc.Additional value products, heavy fraction is reduced in viscosity by viscosity reduction cracking, and low-temperature fluidity is improved;Auxiliary agent B is prepared by dithiophosphoric acid, molybdenum trioxide, epoxy succinic acid polymer, 2,6-naphthalene dicarboxylic acid, anhydrous toluene, phosphorous acid;Fuel oil prepared by the present application, sulfur content is lower, environmental protection is better, low-temperature fluidity is improved, and combustion efficiency is better.

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.

The lubricant composition may provide corrosion resistance, oxidation resistance, and reduced wear to the hydraulic system. A lubricant composition can include an ashless dithiophosphate ester in an amount sufficient to provide the lubricant composition with a phosphorus concentration in the range of from 10 ppm to 250 ppm, a metal dialkyldithiophosphate salt, such as zinc dialkyldithiophosphate (ZDDP), in an amount sufficient to provide the lubricant composition with a phosphorus concentration in the range of from 50 ppm to 1000 ppm, a corrosion inhibitor comprising an alkyl triazole derivative in an amount sufficient to provide the lubricant composition with a nitrogen concentration in the range of from 0.75 ppm to 100 ppm; and a major amount of a base oil.

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 belongs to the technical field of organic synthesis, and particularly relates to a kind of beta-carbonyl dithiophosphoric acid ester compounds, preparation method and application. The application is prepared by using cheap and easily available styrene, P4S 10 And alcohol as raw material, tetrabutylammonium tetrafluoroborate ( n Bu4NBF4) as electrolyte, acetonitrile (CH3CN) as solvent, beta-carbonyl dithiophosphoric acid ester compound is prepared in room temperature and air atmosphere. Compared with the preparation method reported previously, the application has the advantages of green, environmental protection, safety, high efficiency and energy saving, the raw material is easy to obtain, and the operation is simple, and has potential industrial application prospect.

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.

The present application relates to the field of flotation, in particular to a kind of O, O-di-(thiocarbamoyl sulfanylalkyl)-dithiophosphoric acid collector, it is compound with formula 1 structure.The present application also includes the combined collection of the collector, flotation reagent comprising it and its preparation and application.The present application research shows that using the new collector, can be based on the synergy of intramolecular structure, can unexpectedly show better collection performance.

The preparation method comprises the following steps: dissolving diisobutyl dithiophosphoric acid in toluene, adding a phase transfer catalyst, slowly dropwise adding water under the protection of nitrogen, heating and refluxing to hydrolyze the diisobutyl dithiophosphoric acid to generate diisobutyl monothiophosphoric acid, and then adding a phase transfer catalyst into the diisobutyl dithiophosphoric acid to obtain the diisobutyl sodium monothiophosphoric acid. Hydrogen sulfide generated in the reaction process is carried by nitrogen and absorbed by alkali liquor, and toluene is concentrated and recovered after the reaction is finished; then carrying out neutralization reaction on the obtained diisobutyl monothiophosphoric acid and a sodium hydroxide solution under a low-temperature condition, and filtering to remove impurities after the reaction is finished, so as to obtain a sodium diisobutyl monothiophosphate solution. According to the method disclosed by the invention, the hydrolysis and neutralization conditions can be optimally controlled through parameters such as dropwise adding time, temperature, molar ratio and the like, so that the reaction selectivity and the purity of a finished product are improved. According to YS / T 675-2008 standard determination, the main component content of the diisobutyl sodium monothiophosphate obtained by the method can be stably controlled at 49%-53%, and the method is suitable for industrial continuous production.

The invention relates to a method for increasing the value of metals present in a phosphoric acid solution, said method comprising the following steps: (E1) stirring a phosphoric acid solution comprising an adsorbent; (E2) treating the phosphoric acid solution with a first agent selected from the group consisting of xanthogenate, dithiophosphate, dithiophosphonate and mixtures thereof, thereby adsorbing the metal to be appreciated on the adsorbent solid; (E3) separating the treated phosphoric acid solution and an adsorbent solid comprising the metal to be appreciated; (E4) dispersing the adsorbent solid comprising the metal to be appreciated in a solvent, thereby dissolving the metal to be appreciated and regenerating the adsorbent solid; (E5) treating the solvent with a second reagent in order to precipitate the metal to be appreciated in the form of a metal salt.

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 invention discloses a method for preparing malathion by adopting a solid acid catalyst, and belongs to the technical field of organophosphorus pesticide synthesis. O, O-dimethyl dithiophosphoric acid and diethyl maleate are used as raw materials, solid acid is used as a catalyst, and addition reaction is performed to prepare malathion; the solid acid is selected from one or more of ethylenediaminetetraacetic acid, sulfonated carbon, sulfate zirconium oxide and silicon-aluminum oxide. The process provided by the invention breaks through the technical bottleneck of catalyst selection in malathion synthesis, solves the environmental protection pain point and the efficiency bottleneck in the prior art through innovative application of specific solid acid, and has the advantages of recoverable catalyst, high raw material conversion rate, excellent product purity, simple process, low energy consumption and the like. The method does not need to greatly transform the existing industrial production device, can be directly popularized and applied, can effectively reduce the production cost, reduce the environmental pollution and improve the product competitiveness, is suitable for large-scale production of agricultural, hygiene and epidemic prevention and medicinal malathion, and has wide industrial application prospects and remarkable economic, social and environmental benefits.

According to the present application, there is provided a grease composition for a constant velocity joint, comprising: (a) a base oil, (b) a diurea thickening agent, (c) a molybdenum dithiocarbamate, (d) a molybdenum dithiophosphate, (e) a high basic calcium sulfonate, (f) a neutral zinc sulfonate. The composition of the present application is excellent in durability at high temperature and vibration suppression.

The invention discloses a beneficiation method for copper-zinc polymetallic ore containing pyrrhotite and a collecting agent, and belongs to the field of beneficiation. The collecting agent comprises 70%-85% of dithiophosphoric acid and / or dithiophosphate; 15% to 25% of mercaptobenzothiazole salt; and 1-5% of a cosolvent. The collecting agent is suitable for copper and zinc flotation of copper-zinc polymetallic ore at the same time. The beneficiation method for the copper-zinc polymetallic ore containing the pyrrhotite comprises the technological methods of ore grinding, copper flotation, magnetic separation and regrinding to remove the pyrrhotite and zinc flotation, and the same collecting agent is adopted for copper flotation and zinc flotation. According to the method, the pyrrhotite is physically removed before zinc flotation, the defect that the pyrrhotite is activated and floats upwards in the zinc flotation operation is fundamentally overcome, and the quality of the zinc concentrate is ensured. Meanwhile, copper flotation and zinc flotation adopt the same collecting agent and have the advantages of being convenient to operate, small in influence of flotation return water on indexes and the like, and the technological process is low in beneficiation reagent cost and high in recovery rate.

The invention discloses a near-infrared luminous gold-copper doped nano-cluster material as well as a synthesis method and application thereof, and belongs to the crossing field of coordination chemistry and nano materials. Thioether gold and copper hexafluorophosphate tetraacetonitrile serve as raw materials, binaphthyl dithiophosphate (R / S-PS) is used for coordination protection, a reducing agent diphenyl silane (Ph2SiH2) is added, the gold-copper-doped nano-cluster material with the near-infrared light emitting function is obtained through a one-pot reduction method, the molecular formula of an enantiomer cluster is Au13Cu4 (C20H12O2PS2) 12 (C7H17NCl) 3, the abbreviation is R / S-Au13Cu4, the enantiomer cluster belongs to an orthorhombic system, and the molecular formula of the enantiomer cluster is shown in the description. And the space group is a chiral space group C222. The material shows a remarkable aggregation-induced emission (AIE) characteristic in a dichloromethane / cyclohexane system. The compound shows strong near-infrared emission at 725 nm in an aggregation state, the photoluminescence quantum yield is as high as 35%, and the compound has a remarkable two-photon excitation luminescence characteristic. The excellent optical properties lay a foundation for realizing high-quality cell imaging application under 740 nm exciting light.

The present application relates to a kind of high-sulfur lead-zinc ore split flow and speed flotation high-grade zinc concentrate method, the method uses sodium carbonate, humic acid salt, yeast powder, sodium sulfide, sodium pyrosulfite One or several combinations of sulfur depressant Ts4, zinc collector LY consisting of N, N-dialkyl dithiocarbamic acid ester, hydrocarbyl dithiophosphoric acid sulfide ester, octanol and non-polar oil portion, the method of split flow and speed flotation is carried out for zinc dressing, in the presence of high sulfur, can not add lime or strong base, it is conducive to environmental protection requirement, while can reduce reagent dosage, save reagent cost, reduce zinc concentrate amount, reduce equipment use and maintenance cost, while being able to obtain high-quality high recovery rate zinc concentrate, reach the final goal of efficient recovery of zinc mineral.

The application discloses a preparation method of a 2'-iodo[1,1'-biaryl]-2-dithiophosphate compound, wherein phosphorus pentasulfide, alcohol, dianyl trifluoromethanesulfonic acid periodate, an organic ligand, a base, a catalyst and an organic solvent are mixed in a reaction container under an air atmosphere, and the mixture is reacted under stirring at 25-100 DEG C for 6-12 hours to obtain the corresponding 2'-iodo[1,1'-biaryl]-2-dithiophosphate compound. The application provides a method for efficiently and selectively synthesizing 2'-iodo[1,1'-biaryl]-2-dithiophosphate compounds by copper catalysis of phosphorus pentasulfide, alcohol and dianyl trifluoromethanesulfonic acid periodate. The reaction process is mild and easy to control. The method is simple and easy to implement, the catalyst is cheap and easy to obtain, the preparation is simple, and the method has a good industrial application prospect.

The preparation method adopts a two-step method for preparation, and comprises the following steps: S1, taking a sodium hydrosulfide aqueous solution as a base material, synchronously dropwise adding a cyanuric chloride alcohol solution and a hydroxide aqueous solution, and controlling the temperature and the pH value to generate a dimercaptotriazine derivative intermediate; s2, synchronously dropwise adding functional monomers (such as isopropylamine and diisobutyl dithiophosphoric acid) and a hydroxide aqueous solution into the intermediate, and controlling the temperature to prepare a target derivative; according to the preparation method, the reaction yield reaches up to 95.84%-97.13%, the product content is 15.6%-17.01%, selectivity is high, side reactions are few, the structure can be regulated and controlled by replacing functional monomers, and the dimercaptotriazine derivative can serve as a core intermediate of a sulfide ore flotation collecting agent and has industrialization potential.