5 results about "Phosphorodithioic acid" patented technology

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.

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.