3624 results about "Potassium permanganate" patented technology

The invention discloses a grapheme/silicon composite material for a lithium ion battery cathode material and a preparation method thereof, belonging to the fields of electrochemistry and new energy materials. The method comprises the following steps of: using graphite as a raw material; oxidizing the graphite into oxidized graphite by adopting oxidants of concentrated sulfuric acid and potassium permanganate; then, ultrasonically stripping the oxidized graphite to prepare oxidized graphene; mixing oxidized graphene in different proportions with nano silicon powder; ultrasonically dispersing, filtering or directly drying into a cake/film; and roasting under a reduction atmosphere to prepare self-support graphene/silicon composite film materials in different proportions. Proved by electrochemistry tests, the graphene/silicon composite film material prepared by the method has higher specific capacity and cycle stability, simple preparation method and easy mass production and consequently is an ideal high-energy lithium ion battery cathode material.

The invention discloses a preparation method of a graphene material. The preparation method comprises the following steps of: with graphite carbon as a raw material, adding potassium hypermanganate and concentrated sulfuric acid in batches in different stages to control an oxidation process of graphite; adjusting the pH value of the oxidized solution to obtain graphene oxide colloidal dispersing solutions (GOS) with different concentrations; dropwise adding the GOS on the surface of a carrier or spreading out the GOS on a non-intersolubility liquid/liquid interface and drawing into a grapheneoxide thin-film (GOF); carrying out high-speed centrifugation and drying treatment on the GOS to obtain graphene oxide solid powder (GOP); reducing the GOS by selecting an appropriate reducing agent,and centrifugally drying to obtain reduced graphene solid powder (GRP); dispersing a proper amount of GRP in an organic solvent to prepare a reduced graphene oxide colloidal dispersing solution (GRS); and dropwise adding the GRS on the surface of the carrier or spreading out on the non-intersolubility liquid/liquid interface and drawing into the reduced graphene thin-film (GRF). Various graphene materials prepared by the invention are easy to mutually transform; and the concentration of the colloidal solution and the thickness of the thin-film can be controlled in a certain range.

The invention discloses a preparation method for preparing manganese dioxides in various crystal forms, comprising the following steps of: with divalent manganese salt as a reducing agent and potassium permanganate as an oxidant, adjusting the ratio of raw materials, and reacting in a reaction kettle at 160 DEG C for 1-12h to synthesize both one-dimensional alpha-MnO2 nano fibers and beta-MnO2 nano bars and gamma-MnO2 flower-like structures. The preparation method is simple in preparation process and low in cost; and the product can be used for the research in fields such as super capacitor direction, catalysis and the like.

The present invention relates to the preparation of nano material. One-dimensional monocrystalline nano manganese dioxide wire of different crystal form is synthesized selectively via controlling thetemperature, period and material control of the hydrothermal reaction of two-valent manganese salt and ammohnium persulfate as raw material and ammonium sulfate as additive at 100-220 deg.c inside one sealed reactor. The process may be widely used in basic theory research in lithium ion cell, molecular sieve and relevant fields.

The invention relates to a high-efficient combined inhabitor for pyrite in complex sulfide ores and the application method of the inhabitor. The inhabitor comprises calcium superoxide and HA-Na. The inhabitor of the invention can inhibit complex vulcanized iron-bearing minerals selectively, has better inhibition properties for magnetic pyrite, pyrite and arsonopyrite, and is an inhabitor of high selectivity. Compared with the prior inhibitors such as lime, cyanide, bichrome, potassium permanganate, sodium sulfide, sulphite, zinc sulphate and trisodium phosphate, the invention has the advantages of lower use level, good effects, no pollution, and other advantages.

The invention relates to a preparation method of a graphene and manganese dioxide nanocomposite material, comprising: (1) stirring and mixing graphite, potassium nitrate and concentrated sulfur evenly, adding potassium permanganate, and reacting at 30-40° C. for 20-40 minutes , add deionized water at room temperature, add hydrogen peroxide after reacting for 15 to 30 minutes to obtain graphite oxide; (2) disperse the above graphite oxide in water, add hydrazine hydrate, and react at 95°C for 1 to 24 hours to obtain graphene (3) ultrasonically disperse the graphene in a saturated potassium permanganate solution, add acid, and react at 60-80° C. for 1-5 hours to obtain graphene and manganese dioxide nanocomposite material. The invention has the advantages of simple reaction, easy control, convenient operation and simple process; the obtained composite material has broad application prospects and can be used for catalysts, biosensing materials, electrode materials of lithium ion batteries and supercapacitor electrode materials, and the like.

The invention discloses a short-spike and root-grafting rapid propagation method for camellia azalea. The short-spike and root-grafting rapid propagation method comprises the following steps: selecting general camellia oleifera seeds, sterilizing the general camellia oleifera seeds with potassium permanganate solution and then carrying out stratification, sprouting and anvil culture; after radicles are 3-4 cm in length, grafting the radicles; selecting one-year branches with strongly-grown crown peripheries, full sprout eyes, no pest and disease damage and half lignification to lignification as scions with the length of 2-3 cm; soaking base parts with a plant growth regulator solution; after the scions are grafted, planting the grafted scions in a container bag filled with nutrient-rich substrate on a seed bed in a sunshelter for culturing; and covering, humidifying, shielding and carrying out standard management to form a high-quality grafted container seedling of the camellia azalea. According to the short-spike and root-grafting rapid propagation method, the grafting is realized at the smooth parts of radicles and the root systems of plants are developed, so that the survival rate and the growth amount of nursery stock can be effectively increased and the culture time of the stock is greatly shortened; and the scions are short, and thus the utilization rate and the propagation coefficient of the scions are improved. The short-spike and root-grafting rapid propagation method has the advantages of convenience for operation, high work efficiency and better economic benefit and social benefit; and according to the method, the scale propagation effect of the camellia azalea stock is ensured.

The invention discloses a water-preserving nutrient soil for indoor flowers, which comprises pond sludge, chaff ash, bean curd dross, Attapulgite clay, alta-mud, quartz sand, potassium permanganate, ferrous sulfate, copper sulfate, sulphur, 45% content of azophoska composite fertilizer and high water absorbent resin.

A composite Mn-Ce oxide catalyst for oxidizing the form-aldehyde into CO2 and H2O is prepared through adding soluble manganese nitrate in the solution of potassium permanganate and cerium ammonium nitrate while stirring, adding potassium hydroxide, stirring to obtain deposit, filtering, washing, drying at 80-120 deg.C and calcining.

This invention relates to a method for fabricating solid-state alkaline polymer Zn-air battery, which consists of a zinc-gel anode, an air cathode electrode, and alkaline polymer electrolyte. The formulation of said zinc gel anode is similar to that of alkaline Zn-MnO2 battery. The zinc gel anode contains a mixture of electrolytic dendritic zinc powders, KOH electrolyte, gelling agent and small amount of additives. The air cathode electrode is made by carbon gas diffusion electrode, which comprises two layers, namely gas diffusion layer and active layer. The active layer on the electrolyte side uses a high surface area carbon for oxygen reduction reaction and potassium permanganate and MnO2 as catalysts for oxygen reduction. The diffusion layer on the air side has high PTFE content to prevent KOH electrolyte from weeping or climbing. Due to adequate amount of fresh air and oxygen supply, the air cathode electrode can run continuously. Theoretically, the polymer zinc-air battery is an accumulator if the cell has sufficient zinc powder and electrolyte, and the air cathode plays the role of energy transfer.

The invention relates to a formaldehyde purificatory absorbent and a preparation method thereof, which belongs to the technical field of a purificant and a preparation method thereof. The formaldehyde purificatory absorbent uses a porous material as a carrier and the carrier is one or more of activated alumina, sea-foam and zeolite molecular sieve. The preparation method relates to that a steeping fluid is placed into a beaker, added with carrier powders at a steeping temperature ranging from 20 DEG C to 60 DEG C, stirred for 2 through 6 hours, dried at the temperature ranging from 100 DEG C to 140 DEG C after being filtrated and then porphyrized with a mortar. The steeping fluid adopts a strong oxidizer potassium permanganate and is diluted to an acid solution and an organic amine solution of 3 to 8 percent by de-ionized water. The method of the invention adopts the strong oxidizer as an active component and carries out the steeping of the carrier after the active component is coordinated with the solution, when the active component is of even load bearing, thus being able to oxidize the adsorbed formaldehyde molecule to be carbon dioxide desorption and forming the cycle adsorption to enlarge the adsorption capacity thereof. Besides, the method of the invention adopts the acid solution and the organic amine to carry out the steeping modification of the carrier, which improves the characteristics of the carrier, like the structure in the pores or on the surface, the polarity and so on, and enhances the adsorption ability to formaldehyde.

The invention discloses a graphene/titanium dioxide lithium ion battery cathode material and a preparation method, and belongs to the field of electrochemistry and new energy materials. The method comprises the following steps of: oxidizing graphite powder into graphite oxide by using concentrated sulfuric acid or potassium permanganate as an oxidant, peeling the graphite oxide to form graphene oxide by adopting an ultrasonic peeling method, mixing the graphite oxide and a titanium source, preparing a graphite oxide/titanium dioxide composite material by liquid phase reaction, and then reducing the graphite oxide/titanium dioxide composite material into the graphene/titanium dioxide composite material by adopting liquid phase reduction. Electrochemical tests show that the graphene/titanium dioxide composite material prepared by the method has high specific capacity and cyclical stability, and is an ideal lithium ion battery cathode material. The material has relatively high specific capacity and cyclical stability, and can exert respective advantages of graphene and titanium dioxide. The preparation method is relatively simple, has low cost, and is suitable for industrialized production.

The invention discloses a bunker coal environment-friendly synergist, which comprises the following components by weight percent: 1 to 10 percent of ammonium bicarbonate, 1 to 8 percent of sodium bicarbonate, 1 to 10 percent of sodium carbonate, 1 to 5 percent of sodium nitrate, 1 to 10 percent of potassium nitrate, 1 to 15 percent of calcium carbonate, 1 to 10 percent of sodium hydroxide, 2 to 10 percent of calcium hydroxide, 1 to 10 percent of potassium permanganate, 3 to 15 percent of potassium chloride, 10 to 35 percent of sodium chloride, 1 to 10 percent of ammonium chloride, 1 to 15 percent of calcium chloride, 1 to 10 percent of borax, 1 to 10 percent of macaroni, 1 to 5 percent of potassium carbonate, 1 to 5 percent of calcium nitrate, 1 to 5 percent of iron oxide, and the balance being micro turpentine, sulfur and paraffin wax. The bunker coal environment-friendly synergist makes flame of combustion be more rampant and denser, the furnace temperature rise to a higher level, the hearth be brighter and cleaner and tail gas be cleaner.

The invention provides a boiler coal combustion-improving desulfurizing and denitrifying agent composition. The composition comprises the following raw materials in parts by weight: 2-7 parts of sodium carbonate, 1-3 parts of alumina, 2-8 parts of aluminium hydroxide, 2-5 parts of ferric trichloride, 2-6 parts of ferric oxide, 3-10 parts of potassium permanganate, 3-10 parts of potassium chlorate, 10-35 parts of activated attapulgite clay, 15-30 parts of urea, 2-4 parts of ammonium formate, 2-4 parts of ammonium chloride, 6-23 parts of ammonium acetate, 3-9 parts of manganese oxide, 9-12 parts of copper chloride, 1-3 parts of copper oxide, 2-4 parts of zinc sulfate, 1-3 parts of zinc nitrate, 7-18 parts of potassium dichromate, 1.0-1.5 parts of titanium dioxide, 0.5-1.0 part of barium molybdate, 0.5-1.5 parts of cobalt sulfate, 0.5-1.5 parts of vanadium pentoxide, 0.3-0.7 part of cerium oxide, 0.1-0.2 part of sodium dodecyl benzene sulfonate and 0.1-0.2 part of alkyl glyceryl ether. The composition is convenient to use, has stable properties, plays roles of combustion improving, desulfurization and denitrification, has coal saving rate of 8-25% and can remove fixed sulfur by 50-70%.

This invention relates to a refine means of epsilon - caprolactam by separation and purification. The feature of the invention lay in that it includes the step of crystallize epsilon - caprolactam from ethereal solution containing crude epsilon - caprolactam.The product purity can reach 99.98%upwards, absorption value of potassium permanganate is greater than 10000 or more, the extinction value of epsilon - caprolactam at 290nm wavelength is 0.05 or smaller. The invention wholly meet the require of industrial product.

The invention relates to a tazobactam synthesis method which comprises the steps of: with 6-APA(Amino Penicillanic Acid) as raw material, preparing a key intermediate 6,6-dihydro penam sulphoxide acid diphenylcarbinol ester through successive reactions of esterification, oxidation, reduetive debromination and the like without separation; then, reacting with 2-triphenyl silicon-1,2,3-triazole; introducing a triazole ring; and finally obtaining the final product of tazobactam through potassium permanganate oxidation and metacresol deprotection. The tazobactam synthesis method is mainly characterized in that a phase transfer catalyst is introduced in the first step, therefore, the reaction rate and the product purity are improved; since an environment-friendly hydrogen peroxide-cobalt acetate catalytic oxidation system is adopted in the third step, the characteristics of good reaction selectivity, high yield, catalyst recyclability and the like are achieved; a method for synthesizing 2 alpha-methyl-2 beta-(1,2,3- triazole-1- radical) methyl penam-3 alpha-carboxylic acid diphenylcarbinol ester by using 2-triphenyl silicon-1,2,3-triazole is adopted in the fifth step, and the tazobactamsynthesis method is simple and convenient to operate, is safe and reliable, shortens the reaction route and improves the total yield. Compared with the traditional process, the tazobactam synthesis method greatly reduces the production cost and the environment pollution and has greater implementation value and economic benefits.

The invention relates to a preparation method of a composite electrode material using flap-like manganese dioxide nanocrystal to coat carbon nanotubes, comprising the following steps: (1) dispersing MWCNTs to a saturated potassium permanganate solution, dropwise adding strong acid to adjust the pH value of the solution to 0-1, performing ultrasonic processing at 60-80 DEG C for 3-10h; (2) allowing the solution to react at 120-180 DEG C for 1-10h, naturally cooling; (3) performing repeated washing, suction filtering and vacuum drying the product obtained in step (2); and (4) pressing the composite product on a nickel screen to manufacture the electrode of a super capacitor. In the invention, the types of required chemicals are few, the cost is low, the reaction is easy to control, the operation is convenient and the process is simple. The obtained carbon nanotube coated by flap-like manganese dioxide nanocrystal has a CV curve with obvious rectangular characteristic when being used as the electrode of a superior capacitor, and has higher specific capacitance and good stability of electrochemical performance.

An adsorption powder useful for the removal of mercury and other metals, as well as furans, dioxins and other organic compounds from gaseous streams. The powder may be characterized as containing a carbon-based powder and an effective amount of cupric chloride suitable for removing metals and organic compounds from high temperature and moisture gaseous streams. The powder may contain calcium hydroxide, sulfur, potassium permanganate, potassium iodide, and combinations thereof.

Consuming water with increased hydrogen content can provide clinical benefits to humans and animals through a non-mitochondria alternative cellular energy (ACE) pathway and also as an antioxidant. This application discloses that the hydrogen content of drinking water can be safely increased by placing into the water a hydrogen generating device, such as a mixture of metallic magnesium and EH-101 (HB-101) containing solution, whereby the device allows for the selective passage of the generated hydrogen but restricts the passage of magnesium and EH-101 (HB-101) components. This partitioning of hydrogen from EH-101 (HB-101) components is achieved by using either reverse osmosis membrane, low density plastic material such as polyvinylidene chloride (PVDC or Saran), or low molecular weight cutoff dialysis membrane to create a sealed container of the magnesium and magnesium chloride, that can be placed into drinkable water. The EH-101 (HB-101) can be initially placed into a breakable inner compartment within the hydrogen permeable container. This compartment can be easily broken by simple squeezing just prior to placing the device into the water that is intended to have its hydrogen content increased. The increased hydrogen content can be assessed by the capacity of the water to decolorize a potassium permanganate test sample.

The invention relates to a porous grapheme/ MnO2 composite film and a preparation method and application thereof. The preparation method comprises the following steps of (1), providing a ball-shaped formwork and coating the surface of the ball-shaped formwork with a polymer layer; (2) providing graphene oxide solution, evenly mixing a small formwork ball coated with the polymer layer obtained in the step (1) with the graphene oxide solution, performing vacuum filtration, and stripping the composite film from a filter membrane after drying; (3) performing high temperature annealing on the composite film obtained in the step (2) to obtain a film of a porous structure; (4) putting the film obtained in the step (3) into potassium permanganate solution to perform hydrothermal reaction to obtain the porous grapheme/ MnO2 composite film. No any binder or conductive agent is needed to be added to the porous composite film prepared by the method, and the porous composite film is good mechanical property and super capacitive performance, has the advantages of being good in high-rate charge and discharge performance, long in circle life and the like, and can be applied to preparing super-capacitors and improve performance of super-capacitors greatly.

The present invention relates to a paper pulp prepared by using rice straw and wheat straw as raw material. The breaking length of said paper pulp is 4500-8100 km. and its tearing strength is 180-280 mN. Besides, said invention also provides its preparation method and concrete steps.

The invention discloses a method for preparing nano manganese dioxide of different crystal forms and appearances by adopting microwave hydrothermal method. The steps are as flows: (1) dissolving potassium hypermanganate in water, adding hydrochloric acid, and stirring to prepare a reaction solution; (2) pouring the reaction solution into a sealable reactor, placing the reactor in a microwave field for microwave radiation with microwave frequency being 2.45GHz, temperature being 105-115 DEG C, and heat preservation time being 0.5-2h, separating, washing and drying the generated precursor to obtain petal-shaped nano delta-phase manganese dioxide. In step (2), the temperature of the reaction solution is 135-145 DEG C, and the product of the reaction is alpha-phase manganese dioxide nanotube. The invention features simple technique, low cost, controllable product quality, extensive applicability and the like, the prepared nano manganese dioxide is applicable to fundamental theoretical research in such fields as battery, molecular sieve, catalyst and magnetic materials, and the research and development of related function materials.

The present invention discloses a method for preparing high-hardness pulp by using graminoid plant as raw material and its cooking process. The hardness of said high-hardness pulp is equal to Kappa number 24-50. The described cooking method includes the following steps: preparing graminoid plant raw material, soaking said raw material, feeding said raw material into a cooker, adding cooking liquor into said cooker, introducing steam to make heating operation to attain the requird pressure, then heat-insulating to the required time.

The present invention discloses a bleached chemical pulp prepared by using graminoid plant as raw material and its preparation method. Said invention is characterized by that it utilizes a high-hardness pulp which is obtained by using cooking process and whose permanganate number is 16-28 and equal to Kappa number 26-50 and makes said high-hardness pulp undergo the processes of pulp-washing and bleaching treatment so as to obtain the invented bleached chemical pulp whose breaking length is 4500-8000 m and folding endurance is 20-70 times.

The dry-land planting agent refers to a kind of droughtresistance crop's nutrient specific to the growth of the plants. The invention is composed of the following components: AU absorber with super strength, carbamide, potassium dihydrogen phosphate, ammonium dibasic phosphate, calcium nitrate, bitter salt, ammonium molybdate, zinc sulfate, manganese sulfate, boracic acid or borax, ferrous sulphate, fulvic acid potassium, disodium edta, fatty alcohol polyethenoxy ether, 6- benzyl aminopurine, melissyl alcohol, potassium naphthylacetic acid, indolebutyric acid, gibberellin, santobrite, potassium sorbate, ketotriazole, penta azole alcohol., thiram, carbendazim, acid brilliant scarlet, humic acid, bluestone, potassium permanganate, potassium chloride, polyethylene glycol, bentonite or water. The invention is featured by sopping, molding moisture, molding fertilizer, withering resistance, disinsection, sterilization, strengthening the effects of the pesticide, accelerating the burgeon of the plants, increasing roots, innocuity, no pollution and low cost.

The invention relates to a preparation method for graphene oxide. The preparation method comprises the following steps: a. mixing a graphite powder and concentrated sulfuric acid at the low temperature; b. adding potassium permanganate, and heating to carry out an intermediate temperate reaction; c. adding water for a high temperature reaction, d. adding hydrogen peroxide aqueous solution for a reaction, and after finishing the reaction, filtering the obtained bright yellow solution; e. washing the filter cake with HCl aqueous solution; f. after drying the obtained solid, putting into water for stirring, and dialyzing; and g. removing a substrate by a centrifugal way to obtain a stable dispersion liquid of graphene oxide.

The invention relates to a vegetable planting method. The method comprises a seed treating step, a seedbed seedling raising step, a fertilizer applying and uniform plowing step, a ridging and ditch feeding step, a bare root planting step, a black plastic film covering step and a field management step, wherein the seed treating step comprises the following specific steps of: irradiating seeds with ultraviolet rays for 10 to 45 minutes to sterilize the seeds; soaking the sterilized seeds in solution of potassium permanganate in a ratio of potassium permanganate to water of 1:500 for 10 minutes; cleaning the soaked seeds with water; and soaking the cleaned seeds in 10 percent solution of trisodium phosphate for 5 to 10 minutes for disinfecting; and mixing the soaked seeds by using lactobacillus. No chemical fertilizer or pesticide is used in a planting process, so that the produced vegetables are not polluted. Actinomycetes and the lactobacillus are used in the seedbed seedling raising step, the fertilizer applying and uniform plowing step and the field management step, so that vegetable root rotting can be prevented and the infestation of plant diseases and insect pests to root systems is reduced.

The invention relates to a method for fast preparing a conductive carbon/manganese dioxide electrode material, comprising the following concrete steps that: (1), a conductive carbon material is added into distilled water, and the dispersion liquid of the conductive carbon material is prepared by ultrasonic dispersion; (2), potassium permanganate is added into the dispersion liquid obtained by the step (1), and the mixture is stirred to cause the potassium permanganate to be completely dissolved; (3), the mixed liquid obtained by the step (2) is put in microwave heating equipment to carry out microwave processing for a certain time, and then a brownish-black deposit is obtained; and (4), the brownish-black deposit obtained by the step (3) is filtered, washed and dried to obtain the conductive carbon/manganese dioxide composite material. The invention has simple preparation technology, high speed, low energy consumption, environmental protection, no pollution and easy industrialization production, and the prepared conductive carbon/manganese dioxide composite material used as a super capacitor electrode material not only has higher specific capacity but also has high power density and energy density and good cyclical stability.

The invention provides a carbon fiber reinforced composite material and a preparation technology thereof. Carbon fiber braided fabric is pretreated in a composite pretreatment solution with the concentration of 50 to 60 percent, wherein the composite pretreatment solution comprises 5 to 20 percent of oxydol and one or more of the following components: 50 to 70 percent of nitric acid, 30 to 50 percent sodium nitrate, ferric chloride, potassium permanganate, and acidic potassium dichromate; the carbon fiber braided fabric is pre-tightened in a adjustable and controllable stretching mechanism byadopting a compression moulding forming method, and then is fixed on a mould through a positioning device and coated with thermosetting resin powder with a required thickness; according to the performance indexes of the carbon fiber reinforced composite material to be manufactured, the carbon fiber braided fabric and the thermosetting resin powder with the required thickness are laid in a matrix position in the mould lay by lay until to designed layer number and thickness are achieved; and then heating and compression molding are carried. Through the surface treatment to the carbon fiber withthe specially prepared composite solution, the compatibility of carbon fiber and thermoset material is greatly improved, and the adhesion property of the carbon fiber and matrix resin is improved. Through the adoption of compression moulding forming, the forming technology is simple, the production is flexible, the production cycle is short, the equipment investment is small, and the cost is low.

The invention discloses a method for preparing nano manganese dioxides with different appearances by adjusting the reaction time only under exactly same other conditions. The method comprises the following steps of adding potassium permanganate into deionized water, and stirring to form a uniform solution in which the concentration of potassium permanganate is 0.3mol/L; then adding manganese sulfate, wherein the mass ratio of potassium permanganate to manganese sulfate is 5:2; then transferring the solution into a high-temperature high-pressure reaction kettle of which the inner container is a polytetrafluoroethylene inner container; reacting for 1-18 hours at 140 DEG C; cooling, filtering, flushing and finally drying to obtain a target product. In the method disclosed by the invention, the process is simple, the cost is relatively low, the reaction conditions are mild, and the appearance of the crystal form is controllable; the obtained product has stable quality, relatively high catalytic electrochemical activity, wide applicability and the like, and can be widely applied to lithium ion batteries, molecular sieves, catalysts, super capacitors and the like as well as the basic study of related fields.