77results about "Manganese halides" patented technology

A loading type of nanometer titania composite carrier is constituted by loading 5-20 nm TiO2 in 10-40 wt% onto gamma-Al2O3. Titania sol is first prepared through sol-gel process and then dropped into pseudo-then diaspore pulp of different solution; and the product is finally processed through drying, calcination successively at 200, 300, 400 and 500 deg.c for 2 hr each. The present invention loads nanometer Tio2 onto macroporous Al2O3 to form the composite nanometer carrier. This can utilize the superority of nanometer TiO2 while overcoming the demerits. By means of the micro design, surface acidity regulation of loaded TiO2 and loading active component, the hydrorefining activity of catalyst may be raised effectively.

The invention relates to a high-performance nano manganous fluoride cathode material and a preparation method therefor. The preparation method comprises the steps of: 1) preparing an alcohol solution where manganese ions and fluorine-containing anion groups are dissolved; 2) carrying out a reaction on the alcohol solution prepared in the step 1) in a reaction kettle at 50-250 DEG C for a specified time, wherein a precipitate is formed in the alcohol solution; and 3) separating the precipitate obtained in the step 2) and washing and drying the precipitate.

The invention belongs to the technical field of material science and chemical preparation and discloses a preparation method of a ferromanganese component fine adjustable Prussian white mesomorphic material. The preparation method comprises the following steps: dissolving potassium ferrocyanide and a stabilizer into a dilute hydrochloric acid solution and then adding divalent manganate into a mixed solution; after ultrasonic treatment is carried out for 30 minutes, carrying out 80 DEG C hydrothermal treatment for 24 hours; then carrying out natural cooling, washing and centrifugally separatingthe obtained precipitate and drying for 12 hours to obtain a cubic Prussian white mesomorphic nano-composite material. The cubic Prussian white mesomorphic nano-composite material with the characteristics of stable presence at room temperature and uniform size and morphology is synthesized by controlling the doping amount of low-valence manganate; the preparation method has the advantages of simple technology and low cost, and provides certain guidance for shape control synthesis and stability improvement of Prussian white.

The invention provides a method for recycling chlorine gas from HCl-containing exhaust gas and preparing manganese chloride, and manganese chloride crystals. The method comprises the following steps: 1. introducing HCl-containing exhaust gas into MnO2 pulp to carry out reaction, stopping the reaction when the pH value of the pulp reaches 1-2, wherein the concentration of MnCl2 in the pulp after the reaction is stopped is controlled at 100-300g/L, and meanwhile, the Cl2-containing gas after the reaction is recycled; 2. carrying out solid-liquid separation on the pulp obtained in the step 1 to obtain a first filtrate, adding manganese-containing alkali liquor into the first filtrate for neutralization until the pH value reaches 3-3.5, removing impurities, and filtering to obtain a second filtrate; and 3. crystallizing the second filtrate, and recrystallizing to obtain the MnCl2.4H2O product. The method can be used for preparing the manganese chloride product which satisfies the following condition required by a lithium ion secondary battery: on the basis of MnCl2.4H2O, the purity is higher than 99.71%.

The invention discloses a hydrometallurgical method for separating and extracting Mn, Fe, Pb and Ag from silver-manganese ore. The method comprises the following steps: leaching silver-manganese concentrate by hydrochloric acid, adjusting the pH value by NH4HCO3 to obtain an ammonium chloride leachate, and leaching residues obtained after the ammonium chloride leaching by a hydrochloric acid solution of calcium chloride to obtain a calcium chloride leachate; electrolyzing the ammonium chloride leachate to prepare iron powder; carrying out a crystallization process of a residual liquid to prepare MnCl2.4H2O, and carrying out thermal decomposition to prepare manganese chloride; and replacing Ag from the calcium chloride leachate by metallic lead to obtain Ag, and replacing by metallic iron or aluminum to obtain Pb. Compared with pyrometallurgy, the method disclosed in the invention has the advantages of saved investment, high recovery rate and substantial economic benefit.

The invention discloses a process for preparing tetrahydrate manganese chloride by leaching out rhodochrosite with waste acid. The process comprises the following steps of: adding waste hydrochloric acid to rhodochrosite step by step for leaching, meanwhile, adding pyrolusite or psilomelane which is used as an oxidant; filtering the generated mixed solution, and leaching the filter residue with acid once again; adding metal manganese powder to filter liquor for precipitating, filtering and abandoning slag; adding oxalic acid in the filter liquor for settling, filtering; adding manganese sulfate powder to the filter liquor for precipitating, and filtering; quantitatively adding BaCl2 to the filter liquor, standing still and filtering to remove excessive SO4 <2->; and finally, carrying out concentrating crystallization and centrifugal separation on the filter liquor to obtain a tetrahydrate manganese chloride product. Compared with the prior art, the process has the advantages of simple process flow, convenience of operation, less investment, high efficiency and easy utilization of industrialization. In the invention, low-concentration waste acid is used for leaching the rhodochrosite to produce tetrahydrate manganese chloride, which not only solves the treatment problem of waste acid, but also efficiently utilizes a large quantity of low-grade rhodochrosite resources and realizes the sustainable utilization of resources.

The invention relates to a surface modification method of a fluoride luminescent material, and the fluoride luminescent material prepared by the method. According to the invention, a matrix material AxMFy:Mn<4+> coated with an inorganic coating layer AxMFy, and an organic solution containing metal phosphate or alkoxy silane or an organic carboxylic acid substance or organic amine, and the obtainedmixed solution is subjected to evaporation drying to obtain the surface-modified fluoride luminescent material co-coated with the organic coating layer-inorganic coating layer; according to the coating method, the corrosion resistance of the fluoride fluorescent powder is remarkably improved, the luminous intensity retention rate and the quantum efficiency retention rate of the modified fluorescent powder reaches 85-95% in a high-temperature and high-humidity environment, and the fluoride fluorescent powder can be widely applied to the field of white light LED backlight source display; afterinorganic coating, the surface defects of the fluorescent powder are reduced, and the luminous intensity and the quantum yield of the fluorescent powder are improved by 5%-15%; after coating with theorganic coating layer, the luminous intensity reducing of the fluorescent powder is less than 3%; and the surface modification method provided by the invention has the advantages that the preparationtemperature is low, the time is short, the process is easy to control, and the surface modification method is suitable for industrial large-scale preparation.

The invention relates to a preparation method of high-purity anhydrous manganese chloride particles. Synthetic manganese dioxide is adopted as a raw material, and hydrochloric acid is adopted as a leaching agent to react to obtain a manganese chloride solution; and the solution is subjected to impurity removal-crystallization-drying- granulation-drying to obtain uniform manganese chloride particles of which the particle sizes are 0.5-8mm. The preparation technology is simple, reaction conditions are easy to meet, the reaction is also easy to control, and a post-treatment process is simple. The synthetic manganese dioxide which is high in purity and low in impurity content is adopted as a preferred raw material, and the hydrochloric acid is adopted as a reactant, so that the cost is low. High-purity anhydrous manganese chloride particles with uniform particle sizes can be obtained, a product is good in quality, and the anhydrous manganese chloride product can meet the production requirements of some special chemical products and medicines.

The invention discloses a preparation method of anhydrous manganese chloride. The method comprises the steps of enabling metal manganese powder to react with hydrochloric acid so as to obtain a manganese chloride solution; removing metal impurities in the manganese chloride solution, then carrying out spray drying on the manganese chloride solution to obtain a solid; dissolving the obtained solid into an alcoholic solvent, filtering, and drying the obtained filtrate by using a spray drying-vacuum rotating disk type drying combination technique to obtain the anhydrous manganese chloride which has the purity of more than or equal to 99.99% and the water content of less than or equal to 0.001%. The obtained anhydrous manganese chloride can meet the application requirements of the special fields such as medicines, high-quality magnesium-manganese alloy, aluminum-manganese alloy, high-purity manganese metal powder catalytic systems and cyclopentadienyl manganese high-efficiency gasoline antiknocks; furthermore, the preparation method of the anhydrous manganese chloride is simple in operation, low in cost and beneficial to industrial production.

The invention relates to a method for treating waste manganese mud generated during production of hydroquinone by aniline process, wherein the manganese mud contains manganese salt, magnesium salt, iron, silica and a little organic matter; manganese chloride, iron chloride and silica can be extracted from the waste material after treatment; and the waste material and waste residue subjected to the treatment can be used as building materials after being roasted. According to the invention, substances extracted with the method provided by the invention have high purity; the steps are simple; the treated waste materials have no pollution; therefore, the method conforms to the requirements on environmental friendliness.

Disclosed is a preparation method of a basic manganese chloride applicable to animal feeds. The preparation method comprises the following steps of adding ammonium chloride solution into a sealed reaction device, then slowly adding in manganese oxide while stirring, heating the reaction mixture to a reaction temperature for thermostatic reaction, and after reaction is completed, performing discharging, filtering, washing and drying processes to obtain the basic manganese chloride. The prepared basic manganese chloride has the advantages of being in low in damage to nutritious components, high in product bio-availability, low in processing cost, simple in preparation processes and the like.

The invention discloses a method for producing precipitated barium sulfate and co-producing manganese chloride. The method comprises the following steps: A, preparing a barium chloride solution; B, preparing a manganese sulfate solution; C, dipping the manganese sulfate solution prepared by the step B into the barium chloride solution prepared by the step A to perform replacement reaction; D, filtering the product after performing the replacement reaction by the step C, and respectively collecting filtrate and filter cakes; E, performing SO4<2-> decontamination on the filtrate collected by the step D, filtering the decontaminated filtrate, and distilling to obtain manganese chloride; F, rinsing the filter cakes collected by the step D till no chloride ion, baking the rinsed filter cakes in an oven, grinding and sieving to obtain barium sulfate. When precipitated barium sulfate is prepared, simultaneously a byproduct, namely manganese chloride is recovered. The byproduct is high in added value, the utilization rate of the energy is effectively increased, and relatively high economical benefits can be obtained.

The invention discloses a process for preparing manganese chloride tetrahydrate by absorbing waste gas containing chlorine by low-taste rhodochrosite. Powder of the low-taste rhodochrosite is prepared to be ore pulp with water; the ore pulp carries out absorption reaction with the waste gas containing the chlorine; the obtained ore pulp is carried out filtration; manganese sulfate powder and metal manganese powder are sequentially added in the filtrate to carry out the purification and the filtration; after the filtrate is evaporated and crystallized, solid MnCl2 4H2O product is obtained. Compared with the prior art, the invention has simple technological process and is convenient to operate. The invention solves the problem of treating the waste gas containing the chlorine, makes full use of the oxidizability without adding oxidant and can also highly effectively use a large amount of low-taste rhodochrosite resource which is difficult to use, which realizes sustainable utilization of resources and reutilization of secondary resources and has good application prospect in industry. By adopting ways of displacement of the metal manganese powder and reduction of the manganese sulfate when purifying and eliminating heavy metals, the invention not only has obvious effect but also reduces secondary pollution to the product and saves process of secondary impurity removal.

The invention provides manganese chloride and a preparation method thereof. The preparation method comprises the following steps of: (1) carrying out double-decomposition reaction, namely, mixing manganous oxide and an ammonium chloride solution in the molar ratio of Mn2+ to NH4+ being 1: (2.4-2.8), and then carrying out heating reaction for 2 to 3 hours at 85-90 DEG C; (2) removing impurities; (3) refining, evaporating and crystallizing; (4) obtaining finished products. According to the preparation method, the special manganese chloride product for a ternary anode material is prepared through the double decomposition of the manganous oxide and the ammonium chloride, and the product cost is reduced.

The invention provides a method for preparing manganese sulfate, anhydrous manganese chloride and calcium sulfate. Grinding sidellose into coarse powder, and producing titanium dioxide by sulfuric acid method is soaked at 60-80°C for 8-10 hours, and then pumped Filter to obtain a clear filtrate, add manganese hydroxide to remove impurities, and obtain a pure manganese sulfate solution; the pure manganese sulfate solution is distilled under reduced pressure into a saturated solution of manganese sulfate, cooled, and manganese sulfate crystals containing crystal water are precipitated, and then dried and pulverized , to obtain the manganese sulfate crystal product; the pure manganese sulfate solution is reacted with calcium chloride solution under stirring, the reaction product is filtered to obtain calcium sulfate filter cake and manganese chloride filtrate, and the manganese chloride filtrate is distilled under reduced pressure to be manganese perchloride saturated solution, cooled and crystallized to obtain anhydrous manganese chloride crystals, dried and crushed to obtain anhydrous manganese chloride crystal products; the calcium sulfate filter cake was washed, dried and crushed to obtain calcium sulfate dihydrate products.

The invention provides a preparation method of a manganese chloride tetrahydrate bulk drug. The preparation method comprises the following steps: mixing manganese monoxide with water to obtain turbid liquid; slowly dropwise adding hydrochloric acid into the turbid liquid to obtain a first reaction liquid; heating the first reaction solution to obtain a second reaction solution; adding food-grade diatomite into the second reaction solution, and stirring to obtain a first mixed solution; filtering the first mixed solution to obtain a first filtrate; adjusting the pH value of the first filtrate; adding manganese powder into the first filtrate, and heating to obtain a third reaction solution; adding the food-grade diatomite into the third reaction solution, and stirring to obtain a second mixed solution; filtering the second mixed solution to obtain a second filtrate; adjusting the pH value of the second filtrate; and purifying the second filtrate to obtain the manganese chloride tetrahydrate bulk drug. The product prepared by the method has very high safety.

The invention relates to the field of inorganic chemistry, in particular to an environment-friendly preparation method of basic manganese chloride, the method comprises the following steps: adding crystal manganese chloride, powdered manganese hydroxide and a catalyst into an enamel reaction kettle to obtain a precipitate; opening the enamel reaction kettle, and transferring precipitate and mother liquor to a vacuum suction filtration device for suction filtration; after suction filtration, transferring precipitates to a constant-temperature drying box to be dried, wherein the drying temperature is 50-120 DEG C, and mother liquor is pumped into an enamel reaction kettle to be recycled. The method is simple in process, short in reaction time, low in production cost and high in yield, the produced product is free of wastewater pollution discharge, the mother liquor obtained after suction filtration can be recycled, the method is suitable for industrial mass production, wastewater discharge is avoided, and the method is a green and environment-friendly basic manganese chloride synthesis method.