11 results about "Phosphorodithioic acid" patented technology

The invention provides a composite reagent system and a chalcopyrite and sphalerite collecting method, and belongs to the technical field of mineral processing. The composite reagent system comprises a histidine derived functional group collecting agent and a black agent, and the histidine derived functional group collecting agent (containing a total sulfur ester group, a sulfydryl functional group and a side chain imidazole ring) serves as a core and is compounded with the black agent according to a specific proportion to form a target combination-synergistic interaction flotation mechanism. The histidine derivative collecting agent derives high-activity functional groups under the alkaline condition, and after sulfydryl is dissociated, stable chemical bonds are formed by the dissociated sulfydryl and metal ions on the surfaces of the chalcopyrite and the zinc sulfide. The black powder serves as an auxiliary collecting agent, and the collecting capacity of fine-grain or low-activity sulfide minerals is enhanced through chemical adsorption of dithiophosphate radicals and metal ions on the surfaces of the chalcopyrite and the sphalerite. After the two components are compounded, the selective enrichment efficiency of copper-zinc minerals in the flotation process is remarkably improved.

The invention provides a high-sulfur magnetite concentrate desulfurization method, and relates to the technical field of high-sulfur magnetite treatment. The method comprises the steps that after target concentrate is subjected to size mixing, two-stage pipeline demagnetizing treatment is conducted, and demagnetized ore pulp is obtained; the demagnetized ore pulp is subjected to combined surface cleaning treatment; carrying out surface modification treatment on the demagnetized ore pulp subjected to combined surface cleaning treatment to obtain demagnetized ore pulp with a hydrophilic-sulfuphobic surface, and then carrying out synergistic activation treatment to obtain activated slurry; and the activated slurry is subjected to flotation treatment through a combined collecting agent based on dixanthate, butyl xanthate and dithiophosphate, and desulfurized magnetite concentrate is obtained. The method synergistically solves the problems of magnetic agglomeration, surface passivation, insufficient activation and the like, the desulfurization efficiency is remarkably improved, the sulfur content of concentrate is reduced, and meanwhile, conditions are created for resource recycling of sulfur in tailings.

The invention belongs to the technical field of mineral flotation, and discloses a flotation collecting agent for non-ferrous metal sulfide ore and a preparation method and application thereof.O, O dialkyl dithiophosphate serves as an initial raw material of the collecting agent, and the target product O, O dialkyl dithiophosphate, halogenated carboxylic ester, hydrazine hydrate, potassium hydroxide and carbon disulfide are sequentially subjected to three-step reaction in absolute ethyl alcohol to prepare O, O dialkyl dithiophosphate; the molecular structure of the N, O-dialkyl phosphorodithioic acid hydrazide-N '-potassium dithioformate simultaneously contains three active groups, namely a phosphorodithioate group, a hydrazide group and dithioformate. By optimizing the material ratio, temperature and time of each step of reaction, efficient connection and stable transition of the process are realized, and the method has the advantages of mild reaction conditions, simplicity and convenience in operation, few side reactions, high yield, stable product and the like. And the prepared collecting agent shows excellent collecting performance and good selectivity on non-ferrous metal sulfide ores such as chalcopyrite, and is suitable for popularization and application in a sulfide ore flotation process.

The present invention relates to compositions that are stable over time in an aqueous medium and comprise thionocarbamate-derived compounds, and to the preparation method thereof. The invention also relates to aqueous collector compositions that are stable for extended periods of time and suitable for use in processes involving the froth flotation of sulfide minerals for the extraction of valuable metals, the compositions comprising compounds derived from thionocarbamate that are stable in an aqueous medium, compounds derived from mono- and dithiophosphates, stable ionic xanthate solutions and lignin.

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 disclosure relates to methods of operating transmissions and for providing bearing pitting protection and a passing static friction performance according to Caterpillar TO-4 SEQ 1221 in a transmission including lubricating the transmission with a transmission fluid composition comprising:greater than 50 wt. % of a base oil of lubricating viscosity;an amount of one or more overbased calcium sulfonate detergent(s) to provide from about 2000 ppm to about 5000 ppm of calcium;an amount of one or more zinc dialkyl dithiophosphate compound(s) to provide from about 700 ppm to about 1500 ppm of zinc; andan amount of one or more molybdenum-containing compound(s) to provide from about 5 ppmw to about 300 ppmw molybdenum, and the one or more molybdenum-containing compound(s) is selected from the group consisting of molybdenum dithiocarbamates, molybdenum phosphorodithioates, organomolybdenum complexes, molybdenum dialkyldithiophosphates and mixtures thereof. The disclosure also relates to the compositions used in these methods.

The invention provides an easy-to-dissolve metal corrosion accelerant and application thereof, and belongs to the technical field of metal corrosion. The effective molar concentration of the O, O '-di (n-butyl) diethylammonium dithiophosphate ranges from 0.04 mmol / L to 0.8 mmol / L. The O, O '-di (n-butyl) diethylammonium dithiophosphate can improve the efficiency of corroding metals by hydrochloric acid; and after the acid pickling solution containing O, O '-di (n-butyl) diethylammonium dithiophosphate is stood for a period of time, the corrosion promoting efficiency of the acid pickling solution is not obviously changed, but the corrosion effect of the acid pickling solution is improved. Compared with single use of hydrochloric acid, the O, O '-di (n-butyl) diethylammonium dithiophosphate provided by the invention has better stability and more excellent corrosion resistance, can partially replace hydrochloric acid for use, and is applied to the field related to promotion of metal corrosion.

The present invention relates to: a lubricating oil composition; a motorcycle having a manual transmission filled with said lubricating oil composition; and a method for using said lubricating oil composition. There is a need to improve the gear shift feeling for motorcycle users (riders). The gear shift feeling for motorcycle users (riders) can be improved by using this lubricating oil composition which contains a base oil (A) and a molybdenum compound (B) (excluding compounds having a dithiocarbamate structure (-N-C(=S)-S-) or a dithiophosphate structure (-P(=S)-S-) in the molecule), and in which the content of the molybdenum compound (B) is not less than 100 ppm by mass and less than 500 ppm by mass in terms of molybdenum atoms relative to the total amount of the lubricating oil composition.

A flotation separation method for native copper and pyrite comprises the steps of first rapidly floating pyrite and then floating native copper and preparing reagents, and includes the following process steps and conditions: grinding and classification: dissociating part of pyrite monomers to a fineness of 50-90% and a native copper monomer dissociation degree of 50-70%; rapid flotation of pyrite: adding a frother to the overflow in a stirring barrel to control the rapid flotation time; rough copper selection: adding a copper collector and a frother for natural copper flotation prepared with 40-70 parts of mercaptan, 10-30 parts of alkyl dithiophosphate and 10-30 parts of non-polar hydrocarbon oil to the rapid flotation tailings; copper concentration: subjecting the copper rougher concentrate to two copper concentrations; and copper scavenging: adding a copper collector and a frother for natural copper flotation prepared with the prepared copper collector to the copper rougher tailings. It has the advantages of avoiding the inclusion of pyrite in copper concentrate, improving the natural floatability of native copper by using mercaptan and then combining with reagents to strengthen the stability of the foam layer, thereby achieving effective recovery of native copper.

The present invention relates to a lubricating oil composition, a two-wheeled vehicle filled with the lubricating oil composition, and a method for using the lubricating oil composition. There is a need to improve the shift feeling experienced by a user (driver) of a two-wheeled vehicle. The lubricating oil composition contains (A) a base oil and (B) a molybdenum compound (excluding a compound having a dithiocarbamate structure (-N-C(=S)-S-) or a dithiophosphate structure (-P(=S)-S-) in the molecule), wherein the content of the molybdenum compound (B) is 100 ppm by mass or more based on the total amount of the lubricating oil composition in terms of molybdenum atoms. The lubricating oil composition can improve the shift feeling experienced by a user (driver) of a two-wheeled vehicle.