83 results about "Sodium iodide" patented technology

The invention discloses a sodium iodide probe assisted gold nanoparticle-polyarginine-polylysine electrochemical sensor and an application thereof. The composite electrode provided by the invention comprises an electrode substrate and a nano composite film modified on the surface of the electrode substrate, the nano composite membrane comprises gold nanoparticles, polyarginine and polylysine. The invention further provides an electrochemical sensor which is constructed by combining the sodium iodide probe and the composite electrode and is used for detecting nitrite. The electrochemical sensor has the advantages of simplicity, rapidness, low detection limit, wide response range, good reproducibility, high selectivity and the like. The electrochemical sensor can be used for measuring the content of nitrite in beef and tap water samples, the recovery rate is satisfactory, and the electrochemical sensor has potential application prospects in the aspects of food safety and environmental protection.

The invention belongs to the field of fine chemical engineering, and discloses a method for synthesizing 2, 3-dimethyl-2-isopropyl butyronitrile, which comprises the following steps of: adding an organic amine solvent into a high-pressure reaction kettle, adding sodium amide, sodium iodide and a phase transfer catalyst into the reaction kettle under the protection of nitrogen and in a stirring state, stirring for a certain period of time, and reacting for 2-3 hours to obtain 2, 3-dimethyl-2-isopropyl butyronitrile. Dropwise adding a mixed solution of propionitrile and 2-bromopropane into the reactor, controlling the dropwise adding speed and the reaction temperature, continuously reacting for a period of time after the dropwise adding is finished to obtain a reactant solution, cooling the reactant solution, adding water, standing for layering, collecting an organic phase, distilling the organic phase at normal pressure to recover a solvent, and rectifying at reduced pressure to obtain 2, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3-pentanediol. According to the method, the sodium iodide, the phase transfer catalyst and the organic amine have a synergistic effect, so that the reaction time is shortened, and the yield of the product is improved.

The invention relates to the technical field of iodide content detection, in particular to a method for determining radiochemical purity and iodine content of sodium iodide capsules for diagnosis by HPLC (High Performance Liquid Chromatography), which comprises the following steps: setting chromatographic conditions, and connecting a radioactive flow detector and an ultraviolet detector in series; preparing a disodium hydrogen phosphate solution, a glucose solution, a vitamin C solution, a first control solution, a potassium iodate solution, a second control solution, a carrier solution, a first sample solution, a second sample solution, a negative control solution and a test solution; and determining the radiochemical purity and iodide content of the first sample solution and the second sample solution in three batches based on the chromatographic conditions and the determination standard. According to the method, test parameters such as capsule sample analysis time, a pretreatment mode and a sample size are optimized, the radiochemical purity of the capsule is accurately determined, and the iodide content is controlled, so that the problem that main components cannot be accurately quantified and potential radioactive impurities cannot be detected by a traditional diagnosis sodium iodide [131I] capsule determination method is solved.

The present invention discloses a preparation method of cobalt-doped and synergistically MXene-coated sodium vanadate composite powder. Using water as a solvent, sodium iodide anhydrous and vanadyl phosphate monohydrate as the sodium source and vanadium source, and introducing cobalt acetate tetrahydrate, by synergistically controlling parameters such as concentration and ratio, reaction temperature, reaction time, filling ratio, etc., the synthesis of HNaV6O embedded with cobalt ions assembled by nanosheets through a one-step hydrothermal method is achieved. 16 Using CTAB, the etched Ti3C2Tx and HNaV6O 16 ·4H2O are compositely assembled through electrostatic coupling, and finally cobalt-doped and synergistically Ti3C2Tx-coated HNaV6O 16 ·4H2O is prepared; the present invention improves the crystal structure and electronic conductivity of HNaV6O 16 ·4H2O, enhances its capacity and cycle stability, and the present invention also discloses the application of this material in the cathode material of sodium-ion batteries.

The invention belongs to the technical field of organic synthesis. The invention particularly relates to a synthesis method of chiral beta-diaryl ethanol. The physiological activity, the pharmacological action and the material performance of the chiral molecule are directly determined by the spatial configuration of the chiral molecule. Therefore, efficient construction of chiral compounds is always the core research direction of organic synthesis and medicinal chemistry. Wherein the chiral beta-diaryl ethanol is a kind of key intermediates with irreplaceable application value. According to the invention, the Suzuki-Miyaura type asymmetric ring-opening coupling reaction of nickel catalyzed aryl epoxy and aryl boric acid with high stereoselectivity is realized, and the asymmetric ring-opening coupling reaction is used for synthesizing chiral beta-diaryl alcohol compounds. The method is wide in substrate compatibility and raw material source, mild in reaction condition, free of exogenous alkali and convenient to operate. An aryl epoxy compound and arylboronic acid are used as raw materials, diethylene glycol dimethyl ether nickel bromide is used as a catalyst, chiral biimidazoline is used as a ligand, under the promotion of sodium iodide, reaction is performed in an ethanol solvent according to the following reaction formula at the temperature of 50 DEG C for 10 hours, and the chiral beta-diaryl ethanol compound with the high ee value is obtained.

The invention discloses a method for preparing 2, 5-diformyl furan by selectively oxidizing 5-hydroxymethylfurfural, which comprises the following steps of: reacting 5-hydroxymethylfurfural serving as a raw material, air or oxygen serving as an oxidant, nitrate or ferric salt and sodium iodide serving as main active components of a catalyst and DMSO (dimethylsulfoxide) serving as a solvent at the temperature of between 80 and 160 DEG C for a certain time under the condition of normal pressure, and separating a product to obtain the 2, 5-diformyl furan. The ferric salt is ferric nitrate nonahydrate, and the catalyst is 2, 5-diformyl furan. The dosage of the ferric salt is 0 to 0.50 mmol; the use amount of the sodium iodide is 0 to 0.50 mmol. According to the method, DMSO is adopted as a solvent, the used catalyst is cheap and easy to obtain, the yield of 2, 5-diformyl furan can reach 95% at most after the reaction is carried out at 140 DEG C for 20 h, the requirement for equipment is low, and the method is suitable for industrial production.

The invention discloses a nuclear waste liquid gamma detection device which is communicated with a nuclear waste liquid discharge pipeline and comprises a measuring cylinder for containing nuclear waste liquid and an annular sodium iodide crystal detector fixedly assembled in the measuring cylinder. The maximum outer diameter of the annular sodium iodide crystal detector is smaller than the inner diameter of the measuring cylinder, and the distance between the bottom of the annular sodium iodide crystal detector and the bottom of the measuring cylinder is L; the annular sodium iodide crystal detector is provided with an annular sodium iodide crystal and an annular shell, the sodium iodide crystal is arranged in the shell, and the top of the shell is fixedly connected with a plurality of photomultiplication and signal processing assemblies coupled with the sodium iodide crystal. The nuclear waste liquid gamma detection device has the characteristics of low detection lower limit and high efficiency.

The invention relates to the field of organic synthesis, in particular to a synthetic method of (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate. The synthesis method of (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate comprises the following steps: mixing a material A, a material B, potassium carbonate, sodium iodide and a solvent, and reacting to obtain a material C; mixing the material C, the material D, triethylamine and a solvent, and reacting to obtain a material E; mixing the material E, ammonia water and a solvent, and reacting to obtain a material F; and mixing the material F, di-tert-butyl dicarbonate, a palladium carbon catalyst and a solvent, and carrying out a reaction to obtain the (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate. The process route is easy to operate and has no special dangerous reaction. Reaction materials are cheap and easy to obtain, and the prepared product is high in purity.

The present invention belongs to the technical field of automatic analysis and measurement in uranium purification and hydrometallurgical processes, and specifically relates to an online high-concentration uranium analysis and detection device for uranium purification processes. A sodium iodide crystal is disposed within a shielding component, a photomultiplier tube is coupled below the sodium iodide crystal, an electronic circuit is disposed below the photomultiplier tube, and a cable is disposed below the electronic circuit. The cable passes through the shielding component, which is provided with a support frame connected to the photomultiplier tube. A through-hole is formed in the sodium iodide crystal, through which a polytetrafluoroethylene (PTFE) tube passes. The two ends of the PTFE tube respectively serve as a solution inlet and a solution outlet, both of which pass through the shielding component. The present invention is suitable for measuring high-concentration uranium in the automatic analysis of uranium purification and hydrometallurgical processes, and measures the uranium concentration in the solution without the addition of any chemical reagents.

The application provides a method for preparing alpha-sulfonamidyl acetal compounds from fatty aldehyde and sulfonamide, and belongs to the technical field of organic chemical synthesis, and comprises the following steps: step 1: fatty aldehyde, sulfonamide, sodium iodide, sodium carbonate peroxide and methanol or ethanol are added into a reaction container for mixing, a reaction mixture is obtained by reacting at a temperature of 50-80 DEG C for 16-24 hours; step 2: after the reaction mixture is purified, alpha-sulfonamidyl acetal compounds are obtained. The sulfonamide drugs used in the method are all commercially available, the fatty aldehyde is commercially available or is prepared by simply oxidizing commercially available fatty alcohol, and the pre-catalyst sodium iodide and the oxidant sodium carbonate peroxide are also cheap and easy to obtain; the method has a wide applicable range of substrates and good compatibility for sensitive groups; the reaction does not need transition metal catalysis, the alcohol used is used as a raw material and a solvent, and the only by-product is water, so that the method has the characteristics of high atom economy and green environmental protection.

The invention belongs to the field of chemical reagents, and particularly relates to a preparation method of alcohol-free acetone. The preparation method comprises the following steps: S1, carrying out primary adsorption by using a 4A molecular sieve and a 5A molecular sieve; s2, carrying out secondary adsorption by using a 4A molecular sieve, a 5A molecular sieve and a 10X molecular sieve; s3, adding sodium iodide into the acetone solution subjected to secondary adsorption treatment according to a solid-to-liquid ratio of 1: 4; s4, washing the crystal with absolute ether at least twice, then carrying out solid-liquid separation, and heating and distilling at 80-100 DEG C; s5, repeating S3 and S4, and carrying out secondary crystallization and crystal cleaning; s6, carrying out dehydration treatment on a crude product subjected to secondary distillation by using a 3A molecular sieve; and S7, carrying out rectification on the dehydrated crude product alcohol-free acetone in a temperature range of 80-100 DEG C. According to the technical scheme, before sodium iodide is added for adduct crystallization and purification, a step-by-step molecular sieve adsorption pretreatment process is introduced. According to the process, two molecular sieves with matched pore diameters and polarities are adopted, an industrial-grade acetone raw material is sequentially subjected to two times of adsorption treatment, and the purpose of synergistic purification is achieved by targeting different impurities.

The invention relates to the field of organic synthesis, in particular to a synthetic method of (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate. The synthesis method of (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate comprises the following steps: mixing a material A, a material B, potassium carbonate, sodium iodide and a solvent, and reacting to obtain a material C; mixing the material C, the material D, triethylamine and a solvent, and reacting to obtain a material E; mixing the material E, ammonia water and a solvent, and reacting to obtain a material F; and mixing the material F, di-tert-butyl dicarbonate, a palladium carbon catalyst and a solvent, and carrying out a reaction to obtain the (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate. The process route is easy to operate and has no special dangerous reaction. Reaction materials are cheap and easy to obtain, and the prepared product is high in purity.

The invention provides a method for synchronously extracting and quantifying micro-plastics and tire abrasives in sludge and application of the method, and belongs to the technical field of residual sludge pollution monitoring. The method comprises the following steps: firstly, freeze-drying and grinding the excess sludge, pre-oxidizing by using a hydrogen peroxide solution to destroy aggregates formed among MPs and TWP, clay, sand and other substances, and then heating to remove the hydrogen peroxide solution; and the residual hydrogen peroxide solution in the pre-oxidation process is prevented from being continuously decomposed in the subsequent density separation process to generate bubbles for jacking impurities to float upwards. A saturated sodium bromide solution and a saturated sodium iodide solution are adopted as flotation reagents for primary density separation and secondary density separation correspondingly, it is guaranteed that MPs and TWP with different densities are separated, impurities are removed through Fenton oxidation digestion, and interference on recognition of specific thermal cracking products of MPs and TWP is reduced. The method provided by the invention can quickly and accurately evaluate the mass concentration pollution status of MPs and TWP in the excess sludge.

The application discloses a preparation and purification method of high-purity radioiodine-labeled antigen. The method comprises the following steps: pre-activating carrier-free sodium iodine[125I] solution in an orthogonal solvation sensitization buffer containing lithium sulfate, 18-crown-6 and beta-cyclodextrin; adding antigen and chloramine-T for a labeling reaction; and performing magnetic separation and purification by using a suspension containing adamantane-modified magnetic microspheres and quaternary ammonium salt-modified strong anion exchange magnetic microspheres after the reaction. The orthogonal solvation effect is used to enhance the nucleophilic activity of iodine ions, and the amount of oxidizing agent is reduced to reduce protein damage; impurities are quickly removed through the double mechanisms of electrostatic adsorption and host-guest recognition. The application has the advantages of high labeling efficiency, high radiochemical purity of the product and complete retention of biological activity.

Methods and compositions for treating various indications by lessening oxidative stress in a patient are provided. A pharmaceutical composition comprises between about 0.001% to about 10.0%, or more specifically between about 0.015% to about 5%, sodium iodide or catalase by weight. The iodine ion or the catalase dissociates hydrogen peroxide into water and molecular oxygen to interrupt biological events that result in negative side effects. The pharmaceutical composition further comprises in some cases a reducing agent or various carrier materials. The pharmaceutical composition is in some cases formulated for a variety of delivery methods.

The invention belongs to the technical field of terahertz (THz) wave absorbing materials, and particularly provides a transparent flexible terahertz absorbing material based on ionic conduction loss and a preparation method thereof, which are used for meeting electromagnetic interference suppression requirements in high-transmittance scenes such as aviation optical windows, radomes and sensors. The transparent flexible terahertz absorbing material is composed of an upper anti-reflection layer, a lower anti-reflection layer and polymer-based hydrogel sealed between the upper anti-reflection layer and the lower anti-reflection layer, and the polymer-based hydrogel takes polyacrylamide (PAM) as a framework and water as a filling medium; the filling medium contains salt ions, and the salt ions are one or more of lithium chloride, sodium chloride, potassium chloride, cesium chloride, sodium fluoride, sodium bromide and sodium iodide; the transparent flexible terahertz absorber has the advantages of high wave absorbing performance, excellent flexibility and high transparency.

The invention discloses a high-barrier puncture-resistant food packaging film and a preparation method thereof, and relates to the technical field of food packaging films. When the high-barrier puncture-resistant food packaging film is prepared, firstly, polystyrene is grafted with 2-vinylhexafluoroisopropanol, then the grafted polystyrene reacts with 2-chloro-2-oxo-1, 3, 2-dioxaphospholane, and then the grafted polystyrene reacts with 4-(dimethylamino)-2-methoxybenzonitrile to obtain modified polystyrene, and then the modified polystyrene reacts with 2-chloro-2-oxo-1, 3, 2-dioxaphospholane and 4-(dimethylamino)-2-methoxybenzonitrile to obtain the high-barrier puncture-resistant food packaging film. Secondly, reacting the pretreated vermiculite flakes with hydrogen-containing silicone oil and 1-(5-vinyl-2-hydroxyphenyl) ethanone, then reacting with phosphorus oxychloride and N, N-dimethylformamide, and then reacting with hydroxylamine hydrochloride and sodium iodide to obtain modified vermiculite flakes; and finally, carrying out melt blending on the modified polystyrene, the modified vermiculite sheets and zinc chloride, preparing into a film through a blow molding machine, and reacting with iodine and aluminum powder to prepare the high-barrier puncture-resistant food packaging film. The high-barrier puncture-resistant food packaging film prepared by the invention has good barrier property, antibacterial property and anti-aging property.

The invention relates to a reductive coupling method of aryl sulfide and nitrous oxide, which only needs to use an air bag and a common reaction tube, does not need to use a pressure-resistant tube with potential safety hazards, and takes cobalt bromide (CoBr2) as a catalyst, 4, 7-diphenyl-1, 10-phenanthroline (4, 7-diphe-1, 10-phen) as a ligand, sodium iodide (NaI) as an additive and zinc powder (Zn) as a reducing agent to prepare the aryl sulfide and nitrous oxide reductive coupling method. The method comprises the following steps: under the condition of nitrous oxide of one atmospheric pressure, putting thiazole thioether and derivatives thereof into N, N-dimethylacetamide (DMA), reacting for 12 hours under the condition of 100 DEG C, and then performing column chromatography purification through an automatic column chromatography machine to obtain thiazolone and derivatives thereof. Some important drug molecules can be synthesized by adopting the method.

The invention relates to a synthetic method of optically pure (2R, 3R)-dihydroquercetin, which comprises the following steps of: a, reacting m-dimethoxybenzene with ethyl oxalyl chloride under the protection of inert gas and catalysis of Lewis acid to obtain a compound V; b, under the catalysis of divalent cobalt salt, selectively activating the ortho-position C-H bond of the compound V, and reacting with 3, 4-dimethoxybenzyl alcohol to obtain a compound IV; c, carrying out intramolecular cyclization on the compound IV under the alkaline condition of inert gas protection to obtain a compound III; d, under protection of inert gas and catalysis of a rhodium complex formed by monovalent rhodium salt and a chiral phosphine ligand in situ, hydrogenation reduction of double bonds is correspondingly and selectively realized by the compound III, and a compound II is obtained; e, under the catalysis of sodium bromide or sodium iodide, the compound II reacts with aluminum trichloride for demethylation, and optically pure (2R, 3R)-dihydroquercetin is obtained.The synthetic raw materials are low in price and easy to obtain, operation is easy, the yield and optical purity are high, and the method is suitable for industrial production.

The invention discloses a preparation method of L-2, 4-diaminobutyric acid dihydrochloride, which comprises the following steps: (1) taking L-homoserine as an initial raw material, and reacting with concentrated hydrochloric acid in the presence of a zinc chloride / ferrous chloride synergistic catalyst to prepare L-2-amino-4-chlorobutyric acid hydrochloride; (2) after neutralization, carrying out an acylation reaction with ethyl chloroformate to generate N-ethoxycarbonyl-L-4-chlorobutyric acid; (3) carrying out esterification with ethanol so as to obtain N-ethoxycarbonyl-L-4-chlorobutyl amino acid ethyl ester; (4) under the catalysis of sodium iodide, carrying out nucleophilic substitution reaction with phthalimide potassium salt, and cooling, crystallizing and purifying the key intermediate by dropwise adding water to obtain L-2-[(ethoxycarbonyl) amino]-4-phthalimide ethyl butyrate; and (5) finally, hydrolyzing for deprotection, and concentrating and crystallizing to obtain the L-2, 4-diaminobutyric acid dihydrochloride. The method has the advantages of mild reaction conditions, simplicity and convenience in operation, high total yield and the like, and is suitable for large-scale industrial production.

The invention belongs to the field of drug synthesis, and particularly relates to a preparation method of sodium 2, 3-dimercaptopropanesulfonate, which comprises the following steps: cooling a sodium hydroxide solution, reacting with thioacetic acid, adding 2, 3-dibromopropanesulfonic acid and sodium iodide, and heating to react to obtain a 2, 3-bis (acetylthio) propanesulfonic acid solution; the preparation method comprises the following steps: heating a 2, 3-bis (acetylthio) propanesulfonic acid solution and dilute sulphuric acid to react to obtain a 2, 3-dimercaptopropanesulfonic acid solution; the preparation method comprises the following steps: adding sodium acetate into a 2, 3-dimercaptopropanesulfonic acid solution to react to obtain a 2, 3-sodium dimercaptopropanesulfonate crude product, and refining to obtain a 2, 3-sodium dimercaptopropanesulfonate finished product. By optimizing the molar ratio of 2, 3-dibromopropanesulfonic acid, thioacetic acid, sodium hydroxide and sodium iodide, the reaction temperature, the solvent volume, the refining temperature, the refining solvent volume and other parameters, the purity of 2, 3-sodium dimercaptopropanesulfonate reaches 99.4%, and the yield reaches 54.5%. Sodium iodide is added as a catalyst to effectively improve the reaction efficiency and the product purity. The reaction does not need to adopt one-class metal lead, and the pollution is small.

The application provides a bromine-based leaching reagent system and a method for recycling precious metals from waste circuit boards, and belongs to the technical field of hydrometallurgy. The application takes stable bromine-based strong oxidant, sodium bromide and sodium iodide as the leaching reagent system, controls the bromine volatilization loss to be below 5% through the slow-release bromine mechanism, reduces the bromine consumption by more than 15% compared with the traditional liquid bromine leaching process, simultaneously introduces sodium iodide as a catalytic additive, and significantly reduces the sodium bromide consumption. The weak acid leaching environment is adopted, the leaching efficiency is ensured, and the equipment corrosion problem is effectively reduced. The developed "distillation-precipitation" coupling process realizes efficient recovery of silver and synchronous regeneration of bromine reagent, so that the bromine recycling rate is more than 80%. Through the construction of a gold selective reduction-silver distillation precipitation-palladium solvent extraction hierarchical separation system, efficient recovery of precious metals is realized. The application greatly reduces the processing cost through the recycling of bromine reagent, has significant industrial application value and broad market prospect.

This invention discloses an organic trace element complex for lactating dairy cows, comprising the following components in parts by weight: 40-70 parts of hydroxymethionine complex, 0.1-0.2 parts of sodium iodide, 30-45 parts of yeast selenium, 0.1-0.2 parts of cobalt sulfate, 10-25 parts of synergist, and 5-10 parts of carrier. This invention also discloses the preparation method and application of the above-mentioned organic trace element complex. When used in lactating dairy cows, the various hydroxymethionine complexes can effectively pass through the rumen to the small intestine and be absorbed through amino acid channels, meeting the needs of dairy cows for various trace elements during lactation. The synergistic effect of the various hydroxymethionine complexes and the synergist can improve the lactation performance of dairy cows, increase milk production, enhance the body's resistance, significantly reduce the incidence of mastitis and hoof diseases, and alleviate ketosis.

The utility model belongs to the technical field of sodium iodide crystal preparation, and particularly relates to a sodium iodide crystal preparation drying device which comprises a drying box, a protection door is hinged to the side face of the drying box, an air outlet pipe fixedly penetrates through the top of the drying box, and a motor is fixedly connected to the bottom of the drying box. An output shaft of the motor is fixedly connected with a rotating shaft, the end, away from the motor, of the rotating shaft is fixedly connected with a containing frame, and the circumferential face of the rotating shaft is provided with a uniform heating device used for uniform heating in the drying process. The crystal drying device solves the problems that when a drying device is used, internal hot air is prone to being dispersed unevenly, the drying speed of crystals is possibly inconsistent due to the fact that the hot air is dispersed unevenly, the drying degrees of different portions of the crystals are different due to the uneven drying, and therefore the quality and performance of the crystals are possibly affected. Therefore, the uniform hot air enables the surface temperature and the internal temperature of each crystal to be consistent, thereby ensuring the uniform drying effect of the whole crystal.

The invention discloses a preparation method of difluoroethylamine, and relates to the technical field of chemical synthesis. The method comprises the following steps: S1, preparing a catalyst: preparing the catalyst by taking one of aluminum oxide, activated carbon and silicon dioxide as a carrier, taking one of ammonium iodide, sodium iodide and potassium iodide as a main active component and taking nickel nitrate, magnesium nitrate and copper nitrate as auxiliary catalytic components; s2, filling the fixed bed reactor with a catalyst; s3, introducing difluorochloroethane and ammonia water into the fixed bed reactor; and S4, difluorochloroethane and ammonia water react under the action of the catalyst to generate difluoroethylamine and a byproduct, difluoroethylamine is led out from the lower part of the reactor and is cooled and collected by a cold trap, and non-condensable gas is guided to a tail gas treatment system after being absorbed by water. The method has the advantages of mild reaction conditions, simple reaction equipment and easy operation conditions, and can be used for synthesizing difluoroethylamine under continuous conditions. The method has the advantages of low cost, simple post-treatment, less three-waste generation, high product yield and easiness in industrial large-scale production.

The application belongs to the technical field of organic synthesis, and particularly relates to a method for synthesizing 1-(2,4-dimethylphenyl)thio-N-benzyl-2-naphthylamine by a continuous flow light-heat integrated method. The method is performed in a micro-channel reaction device provided with light and heat. N-benzyl-2-naphthylamine, 2,2',4,4'-tetramethyl diphenyl disulfide and a catalyst sodium iodide are dissolved in acetonitrile solvent to obtain a reaction solution. A blue light is used as a light source of a reaction module, and the temperature is adjusted to 25-60 DEG C. Air or oxygen is introduced into the reaction solution, and magnetic stirring is performed. Then, the gas-liquid mixed reaction solution is input into the reaction module through a peristaltic pump to obtain 1-(2,4-dimethylphenyl)thio-N-benzyl-2-naphthylamine. The application creatively uses the continuous flow light-heat integrated reaction technology to synthesize 1-(2,4-dimethylphenyl)thio-N-benzyl-2-naphthylamine, greatly improves the reaction efficiency, shortens the reaction time, improves the safety and controllability of the reaction, solves the amplification effect of the conventional reaction, and provides a reaction technology without bottleneck amplification for the synthesis of the compound.

The invention discloses an efficient preparation method of mivacurium chloride, which comprises the following steps: (1) reacting (E)-octyl-4-ene-1, 8-diacid, 3-chloro-1-bromopropane, alkali, cesium chloride and a reaction solvent at the temperature of 30-100 DEG C for 6-15 hours; cooling after the reaction is completed, adding water and an organic solvent for extraction, and separating liquid; washing an organic phase with water, and concentrating under reduced pressure to obtain (E)-octyl-4-ene-1, 8-diacid di-(3-chloropropyl) ester; and (2) carrying out a reaction on the (E)-octyl-4-ene-1, 8-diacid di-(3-chloropropyl) ester, the (R)-(+)-5 '-methoxylaudanin, sodium iodide, potassium carbonate and the reaction solvent at the temperature of 50-85 DEG C for 18-40 hours, and carrying out post-treatment to obtain mivacurium chloride. The method disclosed by the invention is novel, avoids the use of thionyl chloride and a condensing agent, is more environment-friendly, is friendly to the environment and an operator, and is mild in reaction condition, high in reaction efficiency, high in yield, low in equipment requirement and simple to operate; the method has the advantages of cheap and easily available reaction raw materials and reagents, few by-products, simple purification and easy operation, and is suitable for preparation of human bulk drugs with high purity and safety requirements, and the purity of the obtained mivacurium chloride is higher than 99.5%.

The invention relates to the field of biological functional materials, and discloses a preparation method and application of a near-infrared two-region photoresponse Bi / BiOI enhanced compound enzyme. The specific method comprises the following steps: firstly, by taking bismuth nitrate pentahydrate as a bismuth source, sodium iodide as an iodine source and ethylene glycol as a reaction solvent, heating and reacting for a period of time to prepare a BiOI nano material; and then the Bi / BiOI compound enzyme is obtained through reduction of sodium borohydride. The compound enzyme is good in crystallinity, is in a spherical shape of 500-700nm, has CAT enzyme activity under tumor microenvironment response, shows excellent self-enhanced enzyme activity under near-infrared second-region light, effectively solves the problem of low activity generally existing in current cancer treatment nano-enzymes, and has application potential in the aspect of CT imaging.

This invention belongs to the field of experimental technology for oil and gas field development, specifically relating to an experimental device and method for CO2 injection at the gas-water interface to suppress bottom water displacement of natural gas. The device includes a reservoir simulation system, a fluid injection system, a multi-dimensional visualization monitoring system, and a production metering system. The reservoir simulation system uses a sand-filled pipe to simulate a vertical reservoir, and a temperature control module regulates the temperature of the sand-filled pipe. The fluid injection system uses a fixed-point injection pipe with adjustable depth that can penetrate deep into the pipe body to precisely inject CO2 into the gas-water interface. The multi-dimensional visualization monitoring system uses a scanner and krypton tracers mixed with simulated natural gas and sodium iodide tracers mixed with simulated formation water to achieve dynamic monitoring of multiphase fluids throughout the displacement process. This invention can simulate the vertical development characteristics of deep bottom water gas reservoirs with high fidelity, intuitively revealing the mechanism of CO2 inhibition of bottom water coning, and providing precise experimental basis for optimizing gas reservoir development schemes.

This application discloses a method for curing silver iodide, a ceramic curing body, and its applications. The method for curing silver iodide provided in this application, considering the widespread use of silver iodide in the treatment of radioactive iodine, directly uses silver iodide as a raw material, mixes it with barium source salt and sodium iodide salt raw materials, and prepares a ceramic curing body through steps such as dry pressing, reaction, and sintering, thereby curing radioactive iodine within the ceramic curing body. This method is simple, low-cost, and highly applicable, and can cure silver iodide with a content of 4.44–35.40 wt%. Compared with traditional iodine curing methods, it is more practical and can be applied to the disposal of radioactive iodine waste.