77results about "Manganese halides" patented technology

To prepare a fluorinated cathode active material having a guest cation comprising sodium or lithium included therein in a nonaqueous electrolyte secondary battery, an alkali metal fluoride represented by the formula AF and a transition metal fluoride represented by the formula M'F2 are treated by chemical milling to thereby give a fluoride AM'F3. A satellite ball mill is preferably employed in the chemical milling treatment.

The invention discloses a method for preparing anhydrous manganese chloride under anhydrous reaction conditions, which comprises the following steps: (1) mixing metal manganese powder and solvent alcohol, introducing gas hydrogen chloride into the solvent alcohol in a metering mode to react with the metal manganese powder until the manganese powder is completely dissolved, and filtering to obtain an anhydrous manganese chloride alcohol solution; (2) stirring and distilling under normal pressure in a hydrogen chloride atmosphere to recover the solvent and obtain a manganese chloride crystal alcohol complex; and putting the manganese chloride crystal alcohol complex into a closed dryer, heating in a stirring state, and dealcoholizing under reduced pressure to obtain the anhydrous manganese chloride. The method has the characteristics of simple technique, simple after-treatment, high safety and high product yield, and does not have the basic manganese chloride and manganese peroxide impurities in the conventional preparation method. The anhydrous manganese chloride is obtained under anhydrous conditions, so the method has the advantages of high product yield, high safety and the like, and is simple to operate and suitable for industrial production.

The invention relates to a manufacturing method of ultra-pure battery-grade manganese chloride for a battery material, which comprises the following steps that: manganese chloride solution which is prepared by leaching ordinary manganese carbonate or metal manganese with high impurity content through hydrochloric acid is added with hydrofluoric acid, fluoride, phosphoric acid, phosphate salt or polyphosphoric compound to remove calcium (Ca) and magnesium (Mg), sulfide, polysulfide or sulfuric organic sodium salt is used for removing heavy metal impurities, the pH value of the solution is maintained at 2.5 to 6.0, the solution is filtered after the reaction, filtered liquid enters an iron-removing reactor, the reaction temperature is controlled at 30 to 120 DEG C, the Baume degree is 30 to56 degrees Be, industrial peroxide or hydrogen peroxide is added under the pH value of 2.5 to 6.0 to remove the iron, organic matters can be removed by adding particle or powder active carbon under the temperature of 30 to 120 DEG C, filter liquid after the reaction and filter is pumped into a concentrator to be concentrated, crystallized and dripped at a normal pressure or a negative pressure, so an ultra-pure battery-grade manganese chloride product is obtained. For the manganese chloride product prepared through the method, the content of the manganese chloride product can reach more than 99 percent.

The invention relates to a method for preparing methanesulfonic acid by recycling a byproduct, namely hydrochloric acid. The method is characterized in that a method of hydrogen chloride, chlorine gas, methanesulfonic acid and hydrogen chloride is adopted, and the byproduct, namely the hydrochloric acid is recycled in the preparation process of the methanesulfonic acid to prepare the methanesulfonic acid. The method has the advantages that the byproduct, namely the hydrochloric acid is adopted for preparing chlorine gas and directly reacted with dimethyl disulfide, so that the safety risk and the logistics cost in purchase, transportation and storage of the chlorine gas with severe toxicity can be avoided; the byproduct, namely the hydrochloric acid, which is difficult to sell can be locally digested and utilized, and turned into treasure, so that the byproduct, namely the hydrochloric acid becomes a main raw material for preparing the methanesulfonic acid and the recycling of chlorine element is realized. Simultaneously, leftover manganese dioxide waste after oxidation reaction of potassium permanganate is utilized to prepare manganese chloride, and the manganese chloride can be used for electrolytic manganese, so that the production cost and the safety risk of the methanesulfonic acid are greatly reduced, and two major restricting factors, namely the chlorine gas and the byproduct, namely the hydrochloric acid in the preparation method of the methanesulfonic acid are simultaneously eliminated.

The invention relates to a technology capable of recycling fluorine and zinc from steelmaking soot. Two-segment acid leaching is adopted for enabling zinc, fluorine and iron in the steelmaking soot to be dissolved in a solution, and then a precipitation method is adopted for enabling harmful element fluorine in the solution to be separated from the solution; and defluorination filtering liquid enters a zinc smelting system, and according to the normal technology, electrolytic zinc is produced. Fluorine-contained precipitation is washed, filtered and dried, and then a fluoride product is obtained. after the technological treatment is carried out, the zinc in the steelmaking soot can be recycled in a manner of a product of excellent cathode zinc, the harmful element fluorine is comprehensively utilized in a manner of an auxiliary product, and the environment pollution caused in the long-term stacking and storing or take-out transportation process of the soot in the steelmaking industry can be eliminated.

A method of manufacturing manganese tetrafluoride comprises reacting a manganese compound and a fluorinating agent at a temperature of 250-350° C. and a pressure of 1.0-10.0 MPs to fluorinate the compound, while constantly or discontinuously crushing or grinding the starting compound and the manganese compound being reacted. According lo the method, since. fluorine is deeply penetrated into the interior of the manganese salt particles, the ratio of conversion to manganese tetrafluoride, MnF4 can he improved.

The present invention proposes a method for producing divalent manganese salt, which includes the following operations: mixing raw materials containing manganese dioxide, acidic aqueous solution and hydrogen peroxide, controlling the pH value of the reaction mixture to be no greater than 6.4, and generating divalent manganese salt after stirring ; Wherein, the acidic aqueous solution is an aqueous solution containing one or more of sulfuric acid, hydrochloric acid, nitric acid, acetic acid or citric acid. The invention provides a method with low energy consumption and low pollution, which converts manganese dioxide into divalent manganese salt, or removes manganese dioxide as impurities from raw materials. In the present invention, hydrogen peroxide, as a common chemical product, is cheap, produces water and oxygen after the reaction is completed, has no pollution, and does not bring impurities into the solution. According to specific needs, one or more aqueous solutions of sulfuric acid, hydrochloric acid, nitric acid, acetic acid or citric acid can be used to generate different manganese salts, so the product has good adaptability and high purity.

The invention provides improvement of a technology for industrialized production of manganese chloride tetrahydrate and anhydrous manganese chloride, aiming at the problems of a production technologyof manganese chloride in the prior art that a product has more impurities and the form of the obtained product is single, and the production technology is not suitable for the industrialized production.

The invention provides a novel ultrahigh-sensitivity nano fluorescent temperature probe material KMn<0.8>Yb<0.19>Er<0.01>F<3>. Because the electron-state wave function of Mn<2+> ions and Er<3+> ions of a matrix are overlapped, through an exchange effect, the <4>T<1> energy level of the Mn<2+> ions builds an electron coupling channel for the <2>H<11 / 2> and <4>S<3 / 2> energy levels of the Er<3+> ionswith the <4>F<9 / 2> energy level of the Er<3+> ions. The exchange effect distance is regulated and controlled depending on the temperature, the intensity ratios of green light emitting bands at the positions of 522 nm and 542 nm to the red light emitting bands at a position of 654 nm of the Er<3+> ions are remarkably changed, so that temperature detection suitable for a temperature range in livingbodies is achieved. The monitoring emission peak distance of the up-conversion fluorescent nano temperature probe material is large and reaches 112 nm, the signal discrimination degree is high, the absolute temperature sensitivity is 0.0113K<-1>, the highest relative temperature sensitivity is 5.7%K<-1>, the temperature sensitivity of the up-conversion fluorescent nano temperature probe materialexceeds the temperature sensitivity of other up-conversion fluorescent nano temperature probe materials which are currently studied by far. Therefore, after surface functionalization, the up-conversion fluorescent nano material can be used as a fluorescent nano temperature probe suitable for temperature detection in living bodies.

The invention discloses a method for cyclic utilization of a chlorine gas and simultaneous coproduction of manganese chloride in a chloride pyridine production process. The method comprises the following steps: with pyridine and chlorine gas as raw materials, preparing a chloride pyridine mixture and a mixed gas of the chlorine gas and hydrogen chloride; introducing the mixed gas into slurry of manganese oxide ore, stirring and leaching, and controlling the liquid-to-solid ratio to be (2-9) to 1 in the leaching process; drying the leached chlorine gas and circulating as a raw material for preparing the chloride pyridine; leaching and carrying out solid-liquid separation to obtain a manganese chloride leach liquid; purifying and removing impurities from the leach liquid, evaporating and crystallizing to obtain a manganese chloride product. According to the method, recycling and reusing of the chlorine gas in the pyridine chlorination process can be realized; a high-quality manganese chloride product can be coproduced; the process is economical and efficient; and the method has good industrialization feasibility.

The invention discloses a KMnF3 nanowire and a preparation method thereof,. The KMnF3 nanowire is characterized in that one-dimension oil-soluble KMnF3 nanowire is prepared by mixing manganese oleate, oleic acid, oleylamine and octadecene according to a certain proportion and reacting under a condition of excessive potassium fluoride. According to the invention, the one-dimension oil-soluble KMnF3 nanowire is synthesized by the high-temperature oil phase method for the first time, and water-soluble KMnF3 nanowire is obtained after high molecular surface modification, has a longitudinal molar relaxation rate r1 of 4-6 mM<-1>s<-1>, and is a good T1 magnetic resonance imaging (MRI) contrast agent.

The invention discloses a method for preparing anhydrous manganese chloride. The method comprises the following steps: (1) mixing metal manganese powder and solvent alcohol, dropwise adding fatty acyl chloride to react with the metal manganese powder, thereby obtaining an anhydrous manganese chloride alcohol liquid; and (2) stirring and distilling to recover the solvent at normal pressure, obtaining an anhydrous manganese chloride crystallization alcohol complex, adding the complex into a closed dryer, dealcoholizing under reduced pressure, thereby preparing the anhydrous manganese chloride. The method disclosed by the invention is simple and convenient in process, simple in after-treatment, high in safety and high in product yield, and alkali type manganese chloride and manganese dioxide impurities in the conventional preparation method are avoided. The prepared anhydrous manganese chloride has the advantages of ideal product yield and purity, simplicity in operation and safety, and the product meets the requirements of special chemical products and medical production and is suitable for industrial production.

The invention discloses a dehydrating method to obtain low-water manganese chloride and receiving rate improving method of manganese compound, which comprises the following steps: placing manganese chloride with crystal water in the sealed drier; heating to 150-450 deg.c; extracting into -0.01-0.1Mpa; gasifying the manganese chloride crystal water in the drier; draining along with vacuum; measuring the drained water; putting in the oxonation autoclave through pipe to do oxonation reaction. The invention makes water content of manganese chloride lower than 200ppm, which improves receiving rate of manganese compound by 8-15%.