101 results about "Potassium iodine" patented technology

The invention discloses a microneedle patch for quantitatively detecting the blood sugar concentration of a human body as well as a preparation method and application of the microneedle patch, and belongs to the technical field of medicine detection. Mixing the PVA solution and the chitosan solution, adding the silk fibroin solution, and mixing to obtain a mixed solution; adding the mixed solution into a microneedle patch mold, enabling the mixed solution to enter the tip part of a microneedle, and performing vacuum filling on a cavity; adding a glucose oxidase solution and a potassium iodide solution into the mixed solution, mixing, continuously pouring the obtained mixed solution into a microneedle patch mold, filling a backing part at the upper end of a needle tip in the microneedle patch mold with the mixed solution, filling a cavity with the mixed solution in a vacuum manner, and repeatedly freezing, thawing and drying to obtain the microneedle patch for quantitatively detecting the blood glucose concentration of the human body. The microneedle patch for quantitatively detecting the blood sugar concentration of the human body can quantitatively detect the blood sugar of the human body, can visually reflect a detection result, is rapid and painless, low in cost, high in mechanical property and good in stability, and provides guiding significance for early diagnosis of diabetes mellitus.

The invention discloses a preparation method of diiodosilane, and belongs to the technical field of material synthesis. The preparation method of diiodosilane comprises the following steps: adding a first iodine source and a second iodine source into a closed reactor in an inert gas atmosphere, and dissolving the first iodine source and the second iodine source in a solvent to form a uniform solution; and reducing the temperature, and adding liquid dichlorosilane. Raising the temperature to 30 to 80 DEG C and reacting; and after the reaction is finished, heating at reduced pressure, rectifying and purifying to obtain the high-purity electronic-grade diiodosilane. The first iodine source is lithium iodide, the second iodine source is at least one of sodium iodide or potassium iodide, and the solvent comprises at least one of acetonitrile, acetone, diethyl ether or ethanol. Lithium iodide and sodium iodide or potassium iodide are compounded, a specific solvent is matched, and a one-step method is used for testing, so that the input cost of raw materials is reduced, the experimental steps are simplified, the reaction rate of a reaction system can be improved, and the purity of a diiodosilane product is improved.

The invention belongs to the technical field of functional food, and particularly relates to a nutritional supplement composition containing various vitamins and mineral substances. The nutritional supplement composition comprises the following components: black pure fat chocolate, vitamin A, vitamin D3, vitamin E, vitamin B1, vitamin B2, vitamin B6, vitamin B12, vitamin C, folic acid, nicotinamide, biotin, calcium pantothenate, heavy magnesium carbonate, ferrous fumarate, zinc gluconate, sodium selenite, copper sulfate, potassium iodide, manganese gluconate and calcium carbonate. The preparation method comprises the following steps: preparing a powder premix; then adding the powder premix into the molten black pure fat chocolate and stirring; the materials are prepared into an inner core containing vitamins and mineral substances through a chocolate forming machine, and then the inner core is coated. The multivitamin mineral sugared pill product provided by the invention is good in taste and stable in effective components, and can effectively relieve fatigue, promote physical and psychological health, improve sleep and improve memory.

The invention discloses a preparation method of 1-fluoromethyl methyl carbonate, which is characterized by comprising the following steps: 1, 1-chloromethyl methyl carbonate is dissolved in a mixed solvent, the mixed solvent comprises an organic phase and a water phase, and the water phase is deionized water; adding a catalytic amount of iodized salt and an excessive amount of acidic fluorination reagent, and carrying out nucleophilic fluorination reaction at 25-80 DEG C; the iodized salt is selected from one of sodium iodide, potassium iodide and tetrabutylammonium iodide, and the feeding molar ratio of the iodized salt to the 1-chloromethyl methyl carbonate is 0.05-0.2; and 2, after the reaction is completed, washing the reaction liquid with water, concentrating to remove the organic solvent, and carrying out reduced pressure rectification on the concentrated liquid to obtain the 1-fluoromethyl methyl carbonate product. The method has the advantages that reaction conditions are mild and controllable, the process is simple, aftertreatment is convenient, the product purity is 99.6% or above, the yield is generally 91% or above, the highest yield can reach 96.76%, the product purity and yield are both greatly improved, and industrial production is greatly facilitated.

The invention relates to the technical field of food detection, in particular to a method for determining the iodine content in formula food for special medical purposes. The determination method comprises the following steps: (1) weighing potassium iodide, and adding water for dissolving to obtain a reference substance working solution; (2) adding water into a test sample to obtain a sample suspension, and performing alkali ashing treatment to obtain a sample solution; (3) adding a sulfuric acid solution and a reagent adopted for alkali ashing treatment into the reference substance working solution, and respectively performing derivatization treatment and organic solvent extraction on the reference substance working solution and the sample solution to obtain a reference substance solution and a test solution; (4) testing by adopting a gas chromatographic method, and calculating the iodine content; reagents adopted in the alkali ashing treatment are a potassium hydroxide solution, a potassium nitrate solution and a potassium permanganate solution (or manganese dioxide); the derivatization treatment comprises the steps of adding a sodium sulfite solution, standing, and adding a ketone reagent and a hydrogen peroxide solution to carry out a derivatization reaction. The method has the advantages of being low in cost, high in safety and high in accuracy.

The invention belongs to the field of pharmaceutical preparations, and relates to a multi-trace element injection and a preparation method thereof. The multi-trace element injection comprises effective components, a stabilizer and water, the effective components comprise chromium chloride, copper chloride, ferric chloride, manganese chloride, sodium molybdate, sodium selenite, zinc chloride, potassium iodide and sodium fluoride, and the stabilizer comprises xylitol, a pH regulator and an additive; and the additive is PEG (Polyethylene Glycol) 400 or PEG 600. The multi-trace element injection provided by the invention can effectively inhibit the loss of iodine in the sterilization process, and the stability, economical efficiency and production controllability of the multi-trace element injection are fundamentally improved.

The invention relates to deodorizing and sterilizing ionized water and a preparation method thereof. The deodorizing and sterilizing ionized water comprises the following raw materials in parts by mass: 1 part of zeolite calcium, 1 part of bentonite, 1.5 parts of chitin, 0.5-1 parts of sericite, 0.2 parts of sulfur, 0.2 parts of potassium iodide, 0.1-0.8 parts of alkanolamide, 1 part of ethylene glycol, and 100 parts of reverse osmosis water. The preparation method comprises the following steps: step 1, weighing the raw materials in parts by mass; step 2, putting the raw materials weighed in step 1 into a mixing and filtering device for mixing and filtering to obtain a finished filtrate. The deionized water prepared by the invention has good deodorizing and sterilizing effects by emitting far infrared rays and generating negative oxygen ions. At the same time, intermittent centrifugal filtration and intermittent slag discharge are achieved by an intermittently lifting valve plate, a rotating screen drum, an intermittently rotating slag lowering pipe, and a scroll scraper, so that a filter bag on the inner wall of the screen drum is kept clean, thereby improving the filtration speed and the finished product filtration rate.

To provide a mouthwash mixed with povidone iodine (PVPI), containing PVPI in a higher concentration than a conventional product (7%), and to provide a method for producing the same.SOLUTION: A method for producing a povidone-iodine-containing mouthwash containing povidone iodine in an amount of 10% by mass or more based on the total amount (100% by mass) of the mouthwash, the method comprising the steps of: 2.14 4.28, A method for producing a gargle, comprising the steps of: dispersing PVPI in PG to obtain a dispersion; and mixing the dispersion with a mixed solution a1 in which at least one selected from the group consisting of ethanol, glycerin, D-sorbitol solution (70%), saccharin sodium, and 1-menthol is dissolved in water, or a mixed solution a1 in which potassium iodine is further dissolved in the mixed solution a2.SELECTED DRAWING: None

The invention discloses a method for measuring dissolved oxygen in aquaculture tail water by a spectrophotometric method based on an iodine-ascorbic acid-potassium dichromate system, and belongs to the technical field of water quality detection. The method comprises the following steps: sequentially adding a manganese sulfate solution and an alkaline potassium iodide solution into a to-be-detected culture tail water sample, sealing a container, fully reacting, and standing after the reaction is finished to completely precipitate Mn2O3; adding a citric acid solution, sealing, reacting, completely dissolving the precipitate and releasing the iodine elementary substance, adding water and an ascorbic acid-potassium dichromate mixed color developing agent into the solution after the reaction is finished, fixing the volume, sealing, uniformly mixing, and carrying out a color developing reaction in a dark place; a blank sample is used for reference, the culture tail water subjected to color development is placed in a sample pool of a spectrophotometer, the spectrophotometric value of the sample is measured at the wavelength of 360 nm, and the dissolved oxygen concentration is calculated according to a standard curvilinear equation. The method provided by the invention reduces the detection limit of the traditional spectrophotometric method, and has the advantages of high sensitivity, strong anti-interference capability, high speed and rapidness in operation, wide application range, greenness and environmental protection.

The invention relates to an organic silicon heat conduction material, in particular to a repairable liquid crystal type organic silicon heat conduction material and a preparation method and application thereof. P-hydroxybenzaldehyde, potassium carbonate, potassium iodide and halogenated olefin are used for preparing a monomer M1; then reacting the monomer M1 with aromatic diamine to prepare a diene liquid crystal monomer M2; and finally, reacting the diene liquid crystal monomer M2 with hydrogen-containing silicone oil to prepare the organic silicon heat-conducting material. The repairable liquid crystal type organic silicon heat conduction material has excellent heat conduction performance and electrical performance, can repair damaged materials in a proper temperature range through an exchange reaction of imine bonds, and is suitable for preparation of heat conduction components and / or heat conduction packaging of circuit boards.

The invention relates to the technical field of bacteriostasis, in particular to a bacteriostatic product and a preparation method and application thereof. The antibacterial product comprises the following components in parts by weight: 0.05-1 part of potassium iodide; 0.05 to 1 part of potassium iodate; 0.5 to 10 parts of iodine; 6 to 60 parts of glycerol; 15 to 80 parts of AEO-9 (fatty alcohol polyoxyethylene ether); 0.5 to 5 parts of a sour regulator; and 1-10 parts of essential oil. The invention provides a multifunctional disinfectant, which contains iodine, potassium iodide, potassium iodate, glycerol, AEO-9, a pH regulator and essential oil, has strong bactericidal ability, is a broad-spectrum, safe and efficient disinfectant which can be produced in an expanded manner, and is not easy to dye, non-irritant to skin, good in stability and capable of deeply sterilizing.

The application relates to the technical field of electrocatalytic reduction of carbon dioxide, and provides a preparation method and application of a zinc-iodine diatomic pair (Zn-I / ICPs) carbon dioxide electro-reduction catalyst. The zinc-iodine diatomic pair is prepared by using nitrogen-doped carbon as a carrier and an in-situ gas-capturing MOF method, and the specific steps are as follows: first, ZIF-8 precursors are prepared by using zinc nitrate hexahydrate and 2-methyl imidazole as raw materials; then, the ZIF-8 and potassium iodide are co-pyrolyzed under a nitrogen atmosphere, the potassium iodide is used as an iodine source, zinc and iodine atoms are combined in an atomic dispersion form through a gas-phase doping mode, and a Zn-I diatomic pair is formed. The preparation method is simple and controllable, in the prepared Zn-I / ICPs, Zn sites and I sites successfully construct a synergistic catalytic center with complementary functions and electronic coupling, can effectively control an electrochemical microenvironment, accelerate water dissociation and proton transfer, and simultaneously highly effectively inhibit a hydrogen evolution side reaction, and the zinc-iodine diatomic pair can catalyze carbon dioxide electro-reduction to prepare carbon monoxide with high activity and high selectivity.

The application provides a method for separating thiophene compounds in petroleum oil products and application thereof, and the method comprises the following steps: S1: dissolving the petroleum oil product and an alkylating agent in a first solvent to obtain a dissolved oil sample; S2: loading a filler loaded with a catalyst into an adsorption column, transferring the dissolved oil sample into the adsorption column, standing, then sequentially eluting the adsorption column with a second solvent and a third solvent respectively, and collecting an eluent eluted by the third solvent; and S3: fully mixing the eluent with potassium iodide modified silica gel, filtering and collecting a filtrate, so that the thiophene compounds are separated. According to the method, the thiophene compounds in the petroleum can be separated with high purity and high yield, the operation condition of the method is mild, and the thiophene compounds in the petroleum oil products, especially in the high maturity crude oil, can be completely, efficiently and accurately separated.

The invention discloses a composite inhibitor composed of a metal chelating agent and a free radical scavenger and application of the composite inhibitor in inhibition of degradation of an amine absorbent in CO2 capture, and belongs to the field of CO2 capture after combustion. The composite inhibitor is composed of a metal chelating agent and a free radical scavenger, the metal chelating agent refers to diethylene triamine penta (methylene phosphonic acid) (DTPMP) or diethyl triamine pentaacetic acid (DTPA), and the free radical scavenger refers to potassium iodide (KI) or sodium thiosulfate (Na2S2O3). The mass fraction of the metal chelating agent in the composite inhibitor is 10-90%, and the mass fraction of the composite inhibitor added into the amine absorbent is 0.1-1.0%. The composite inhibitor disclosed by the invention can be used for remarkably inhibiting degradation of an alcohol amine absorbent in the field of CO2 capture, and has the characteristics of strong inhibition effect, low price, good stability and high solubility. In addition, through the synergistic inhibition effect between the metal chelating agent and the free radical scavenger in the composite inhibitor, the usage amount of the composite inhibitor can be greatly reduced, and the cost of the inhibitor is reduced.

The invention belongs to the technical field of material science and engineering, and particularly discloses an optimization method for improving the piezoelectric property of a KNN crystal based on composite polarization, and the method comprises the following steps: S1, polishing the potassium sodium niobate crystal, and plating Au electrodes on the upper and lower surfaces of the potassium sodium niobate crystal to obtain an initial material body; s2, putting the initial material body obtained in the step S1 into a crucible filled with silicone oil, and carrying out heating direct current polarization treatment to obtain a polarized material body; s3, putting the polarized material body obtained in S2 into a potassium iodide solution, then polishing, and plating Au electrodes on the upper surface and the lower surface of the polarized material body again to obtain an intermediate material body; and S4, performing normal-temperature alternating-current polarization treatment on the intermediate material body obtained in S3 to obtain the composite polarization material body. According to the optimization method for improving the piezoelectric property of the KNN crystal based on the composite polarization, the piezoelectric property of the KNN crystal is remarkably improved, the required cost is low, the consumed time is short, and practical application and popularization are easier.

The invention discloses a method for determining the average valence state of transition metal in an NCM lithium battery material, and relates to the technical field of chemical analysis. Determining the total amount of transition metal in unit mass of the NCM lithium battery material through an EDTA complexometric titration method; the method comprises the following steps: reducing more than bivalent transition metal in the NCM lithium battery material by using an acidic potassium iodide solution, oxidizing the transition metal into elemental iodine, and titrating the elemental iodine by using a sodium thiosulfate standard solution, so as to obtain the total amount of the actually reduced transition metal in the NCM lithium battery material per unit mass; and finally, calculating the average valence state of the transition metal in the NCM lithium battery material by combining the total amount of the transition metal in the unit mass of the NCM lithium battery material and the total amount of the actually reduced transition metal in the unit mass of the NCM lithium battery material. The detection method provided by the invention is simple and quick to operate, high in test speed and stable and accurate in result, and completely meets the requirement of timely monitoring of large-scale and continuous industrial production and the requirement of research and development on accurate determination.

The invention discloses a preparation method of a delta-aminoketone derivative, which comprises the following steps: reacting olefin, N-aryl sulfonyl aziridine, arylboronic acid, nickel iodide, 5, 5 '-dimethyl-2, 2'-bipyridine, formic acid, acetic anhydride, sodium carbonate and potassium iodide at 80 DEG C for 20 hours, and after the reaction is completed, performing post-treatment to obtain the delta-aminoketone derivative. According to the preparation method, olefin, N-aryl sulfonyl aziridine and arylboronic acid are taken as reactants, formic acid is taken as a carbonyl source, the reaction condition is mild, the operation is simple, the tolerance range of substrate functional groups is wide, and the reaction efficiency is high. Various delta-aminoketone derivatives can be synthesized according to actual needs, so that the method is convenient to operate, and the practicability of the method is widened.

The application discloses a method for detecting iodine content in diltiaxin bulk drug and a quality control method of the iodine content, and belongs to the technical field of drug detection and quality control, and comprises the following steps: preparing a control solution of potassium iodide; dissolving the to-be-detected substance in a hydrazine solution after combustion to prepare a test solution; performing liquid chromatography detection on the control solution and the test solution to obtain corresponding chromatograms; and calculating the iodine content in the to-be-detected substance according to the concentration and peak area of the control solution and the concentration and peak area of the test solution in the chromatograms. The application can quantitatively detect the residual iodine content based on the liquid chromatography detection method, the analysis result is reliable, and the application has the advantages of high detection precision, simple operation steps, high detection efficiency and the like.

This invention provides a method for preparing 1,2-diaminomethyl-cyclobutane-diiodoplatinum. The method includes: preparing crude 1,2-diaminomethyl-cyclobutane-diiodoplatinum using potassium chloroplatinate, potassium iodide, diaminomethylcyclobutane oxalate, and alkali metal hydroxide as raw materials; dissolving the crude product in a mixed solvent of N,N-dimethylformamide and acetonitrile; filtering to obtain a filtrate; adding water to the filtrate to induce crystallization and obtain 1,2-diaminomethyl-cyclobutane-diiodoplatinum; wherein the molar ratio of potassium chloroplatinate to potassium iodide is controlled at 1:12 to 1:20; and the molar ratio of diaminomethylcyclobutane to potassium chloroplatinate in diaminomethylcyclobutane oxalate is 0.95 to 1.15:1, etc., resulting in a purity of 1,2-diaminomethyl-cyclobutane-diiodoplatinum greater than 90%, thus solving the technical problem of low purity in existing technologies.

The application discloses an anti-fatigue composition for high-temperature environment and application, and belongs to the technical field of medicines.The anti-fatigue composition for high-temperature environment is composed of the following components in parts by weight: 15-45 parts of mung beans, 15-45 parts of adzuki beans, 15-45 parts of black beans, 5-15 parts of licorice, 5-20 parts of medlar, 2-12 parts of American ginseng, 0.3-1 parts of L-calcium lactate, 0.01-0.05 parts of zinc gluconate, 0.00005-0.0005 parts of potassium iodide, 0.0002-0.0015 parts of vitamin and 0.0001-0.001 parts of vitamin.The anti-fatigue composition for high-temperature environment can enhance the anti-heat stress capacity of mice exposed to high temperature, prolong the exhaustive swimming time of mice under high-temperature load and enhance the anti-fatigue capacity of mice in a high-temperature environment.

The invention belongs to the technical field of catalytic materials, and particularly relates to a magnetic Fe3O4 composite bismuth oxyhalide photocatalytic material and a preparation method and application thereof.The preparation method comprises the following steps that S1, bismuth nitrate pentahydrate and nitric acid are mixed in a container; s2, after bismuth nitrate is dissolved, potassium iodide, sodium chloride and sodium dodecyl sulfate are added, and then nanoscale Fe3O4 is added; s3, the container is placed in a constant-temperature water bath and stirred, ammonia water and deionized water are added after stirring, a mixture is obtained, faint yellow or orange precipitate gradually appears in the bottle, and the mixture is stirred and subjected to a reaction; and S4, after the reaction is finished, cooling to normal temperature, removing supernate in the container through magnetic separation to obtain a precipitate, and washing and drying the precipitate to obtain the Fe3O4 / BiOIxCly binary composite visible-light-driven photocatalyst, the preparation method is short in period, visible light can be strongly absorbed, and the activity of the catalyst under visible light irradiation is improved.

The present invention relates to a preparation method of a NIR / CT dual-modal imaging probe targeting CD146, comprising: mixing a compound specifically binding to CD146 with hydroxyethyl cellulose to obtain CD146 monoclonal antibody-modified hydroxyethyl cellulose; using L-glutathione, formamide, and gadolinium chloride as raw materials, and preparing near-infrared fluorescent gadolinium(III)-doped carbon dots by a solvothermal synthesis method; mixing CD146 monoclonal antibody-modified hydroxyethyl cellulose with near-infrared fluorescent gadolinium(III)-doped carbon dots to obtain a probe; dissolving the probe in methanol, adding potassium iodide and sodium hydroxide for reaction, and filtering to obtain the NIR / CT dual-modal imaging probe targeting CD146. The present invention prepares a NIR / CT dual-modal imaging probe with high sensitivity and specificity for CD146 molecules, which integrates the characteristics of high sensitivity of NIR and high spatial resolution of CT for the detection of small metastatic tumor lesions, extracts more imaging details through multi-dimensional information, and provides more comprehensive and accurate tumor detection and evaluation.

The invention belongs to the technical field of fire extinguishing materials. The invention provides a fire extinguishing material additive, an inorganic powder fire extinguishing material and a preparation method thereof, the fire extinguishing material additive comprises a first composition and a second composition, the first composition comprises polyoxyethylene, cellulose ether, diammonium hydrogen phosphate, urea, pentaerythritol, a leveling agent, a defoaming agent, silicone amide, potassium iodide and deionized water, the second composition includes hydrogen peroxide. According to the fire extinguishing material additive, inorganic powder is rapidly foamed at a high rate to form powder foam with the volume rate of 30-60 times to form foam solids, the foam bodies have relatively high stability, and the inorganic powder fire extinguishing material has the effects of suffocation, isolation, wrapping and the like, can rapidly extinguish solid, liquid, gas, charged and cooking material fire extinguishing materials, and can be used as a fire extinguishing material for fire extinguishing. The fire behavior can be rapidly and effectively controlled, a fire source can be rapidly blocked, secondary pollution is avoided, and reburning is not prone to occurring.

A composition comprising: lactoperoxidase, an iodide salt, and a pharmaceutically acceptable carrier and / or excipient is provided, for use in the treatment or prevention of equine gastric ulcer syndro

The invention discloses a method for determining the content of phenol in an iron-dextran injection / solution through combination of iron-sodium dihydrogen phosphate precipitation impurity removal and back titration, and relates to the field of analytical chemistry. According to the method, pretreatment is realized through precipitation reaction of iron and sodium dihydrogen phosphate, and interference of iron ions in iron dextran on detection is eliminated. Phenol and bromine are subjected to a bromo-phenol reaction through a potassium bromate-potassium bromide system, excessive bromine and potassium iodide are subjected to a reaction to generate iodine, a sodium thiosulfate titration solution is used for titration by means of an iodometric method, and the content of phenol is calculated. The method does not need a precise instrument, is simple and convenient to operate, can simply, quickly and accurately measure the phenol content in the iron-dextran injection / solution, effectively solves the problem of the existing detection technology in the detection of the sample, fills the technical gap in the detection of the phenol content of the iron-dextran preparation in China, and has a good application prospect. And a brand new solution is provided for veterinary drug production quality control and related detection work.

The invention relates to a high-throughput screening method based on starch-iodine chromogenic reaction, which is used for rapidly identifying lactic acid bacteria strains with alpha-amylase inhibitory activity, and belongs to the technical field of microbial engineering and biological medicine. The method comprises the following steps: preparing an MRS solid culture medium containing soluble starch, preparing a flat plate, performing punching treatment, mixing an alpha-amylase solution and a to-be-detected bacterial liquid in an isovolumetric manner, adding the mixture into holes of the flat plate, performing constant-temperature culture at 37 DEG C for 24-48 hours by taking a non-inoculated alpha-amylase solution as a negative control, and detecting the content of the to-be-detected bacterial liquid in the to-be-detected bacterial liquid. After the culture is finished, uniformly dropwise adding an iodine-potassium iodide solution on the surface of the culture medium for chromogenic reaction, and judging the alpha-amylase inhibitory activity of the strain by observing the formation condition and the diameter of a transparent circle around a bacterial colony. The method has the advantages of simplicity and convenience in operation, rapidness in detection, intuitive result, safety, environment friendliness and the like, is suitable for screening the alpha-amylase inhibitory activity of various lactic acid bacteria and other microorganisms, and provides an efficient and reliable technical scheme for developing a probiotic preparation with a hypoglycemic function; the important application value is realized in the aspects of prevention and treatment of related diseases such as diabetes mellitus.

The invention relates to the technical field of chemical synthesis of pesticides, in particular to a preparation method of a key intermediate-3-iodine-5, 5-dimethyl-4, 5-dihydroisoxazole of a high-efficiency herbicide pyroxasulfone, which comprises the following steps: by taking glyoxylic acid and hydroxylamine hydrochloride as initial raw materials, carrying out oximation reaction to obtain glyoxylic acid oxime; then efficiently completing an iodination reaction through a potassium iodide / iodine elementary substance system under a mild condition, and controlling the reaction process to reduce the generation of byproducts so as to obtain high-purity diiodoformaldoxime; and finally, carrying out addition reaction with isobutene under the condition of normal pressure to finally obtain the target product with high purity and high yield. The core innovation point of the invention is to develop and verify multiple types of novel iodination catalysts, solve the problems of excessive iodine source, poor selectivity and long reaction period in the traditional iodination reaction, and realize collaborative improvement of reaction efficiency, selectivity and economy. The method has the characteristics of more efficient route, more controllable conditions, safer operation, further improvement of yield and purity, higher cost advantage and the like, and the industrial application value is remarkably enhanced.

The invention discloses a rubber accelerator 3-methylpiperidinyl dithio sulfenamide piperazine as well as a preparation method and application of the rubber accelerator 3-methylpiperidinyl dithio sulfenamide piperazine. The method comprises the following steps: dissolving anhydrous piperazine in absolute ethyl alcohol under a stirring condition, adding an aqueous solution containing sodium hydroxide, stirring at room temperature, cooling, adding carbon disulfide stored in absolute ethyl alcohol, stirring, adding a proper amount of 4-methylpiperidine into the system, standing, dropwise adding iodine and potassium iodide which are dissolved in deionized water, continuing to react after the addition is completed, filtering, washing, and drying to obtain the 4-methylpiperidine. And filtering with deionized water, drying and crushing. The accelerator 3-methylpiperidyl dithiosulfenamide piperazine prepared by the invention has the characteristics of high vulcanization rate of a dithiocarbamate accelerator and moderate scorch period of a sulfenamide accelerator, and can solve the problem of rapid vulcanization of ethylene propylene diene monomer.

The application discloses a kind of based on physical-chemical synergistic foaming ultra-light thermal insulation material and preparation method thereof, belong to building thermal insulation material technical field.The ultra-light thermal insulation material based on physical-chemical synergistic foaming of the application, by weight parts, including the following components: light-burned magnesium oxide: 28-37 parts, magnesium sulfate heptahydrate: 18-26 parts, foaming agent: 3.6-5.4 parts, thickening agent: 4.1-5.7 parts, modifier: 0.1-0.4 parts, hydrogen peroxide: 1.5-2.3 parts, potassium iodide: 0.6-1.3 parts, water 45-58 parts.The light thermal insulation material of the application is greatly reduced to 60-80kg / m 3 , and 7d strength is greater than or equal to 100kPa, A-grade non-combustible, thermal conductivity is less than or equal to 0.038W / (m·K), effectively solve the problem that the specific gravity of existing cement-based thermal insulation material is high and thermal conductivity is large, greatly improve the popularization and application of cement-based thermal insulation material.

The present application relates to the technical field of wound gel, in particular to a kind of wound antibacterial disinfectant gel and preparation method thereof.Preparation raw materials of the wound antibacterial disinfectant gel include the following components by weight: PCA-HBPG 4-6 parts, modified chitosan 6-9 parts, 3-amino phenylboric acid 1.5-2 parts, iodine 0.6-0.9 parts, potassium iodide 1.2-1.8 parts, curcumin 0.8-1 part, and the prepared antibacterial disinfectant gel has good bacteriostatic effect, and can promote wound healing.