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3624 results about "Potassium permanganate" patented technology

Potassium permanganate is an inorganic chemical compound and medication. As a medication it is used for cleaning wounds and dermatitis. It has the chemical formula KMnO₄ and is a salt consisting of K⁺ and MnO⁻₄ ions. It is a strong oxidizing agent. It dissolves in water to give intensely pink or purple solutions, the evaporation of which leaves prismatic purplish-black glistening crystals. In 2000, worldwide production was estimated at 30,000 tonnes. In this compound, manganese is in the +7 oxidation state.

A kind of preparation method of graphene 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.

Short-spike and root-grafting rapid propagation method for camellia azalea

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.

Purificant for adsorbing formaldehyde and method of preparing the same

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.

Tazobactam synthesis method

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.

Method of generating hydrogen in drinking water using an enerceutical product added to magnesium in a hydrogen permeable but solute impermeable container

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.

Porous grapheme/ MnO2 composite film and preparation method and application thereof

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.

Method for fast preparing conductive carbon/manganese dioxide composite electrode material

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.

Carbon fiber reinforced composite material and preparation technology thereof

InactiveCN102492289AImprove surface activityThe pits are fine and uniformFiberPerformance index
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.

Method for preparing nano manganese dioxides with different appearances by hydrothermal synthesis process

ActiveCN103553137AHigh catalytic electrochemical activityLow costMaterial nanotechnologyManganese oxides/hydroxidesElectric capacityManganese
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.
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