715 results about "Cyclohexanone" patented technology

The invention relates to the technical field of drilling fluid cooling, and discloses a phase change microcapsule suitable for drilling fluid cooling and a preparation method thereof.The phase change microcapsule comprises a capsule wall stabilizing material and a capsule core phase change material, and the capsule wall stabilizing material comprises polyurethane, polyurea, polyamide, polyimide, polystyrene and a first organic solvent; the capsule core phase change material comprises paraffin, fatty acid, polyol, inorganic hydrated salt, polymer gel, expanded graphite, carbon nanotubes, metal nanoparticles and a second organic solvent, and the first organic solvent is at least one of toluene, xylene, cyclohexanone and the like. The temperature of the drilling fluid is kept at a relatively low level, the cooling of the drilling fluid is realized, so that the drilling efficiency is improved, harmful solvents and additives are not used in the preparation process of the phase-change microcapsules, the phase-change microcapsules are pollution-free to the environment, and the requirements of greenness and environmental protection are met.

The invention discloses a high-strength cold-resistant fiber and a preparation method thereof, and relates to the field of fibers. When the high-strength cold-resistant fiber is prepared, diphenylphosphine sequentially reacts with triallylmethoxysilane and nickel bromide, and a silicon-phosphorus-nickel complex is prepared; the preparation method comprises the following steps: reacting an alkene mixed solution, azodiisobutyronitrile, a hydrochloric acid solution and a silicon mixed solution, diluting with 4-methyl cyclohexanone, and reacting with zinc bromide to prepare a pre-modified polyacrylate emulsion; the preparation method comprises the following steps: carrying out a batch reaction on graphene oxide and 1-aminopyrrole to prepare modified graphene oxide; the modified graphene oxide, 2, 5-dihydroxy terephthalaldehyde and the pre-modified polyacrylate emulsion react and then electrostatic spinning is conducted, and the high-strength cold-resistant fiber is prepared. The high-strength cold-resistant fiber prepared by the invention has antibacterial, anti-aging, flame-retardant and antistatic capabilities.

The invention discloses a method for purifying p-dioxanone by coupling vacuum distillation with solution crystallization, which comprises the following steps of: firstly, removing light and heavy impurities from a p-dioxanone crude product in a vacuum distillation manner; and the rectified and purified p-dioxanone enters a crystallizer to be subjected to solution crystallization operation to obtain high-purity p-dioxanone, and crystallization mother liquor is returned to vacuum rectification after the solvent is removed.

The invention belongs to the technical field of chemical production, and particularly relates to an efficient energy-saving refining system for producing cyclohexanone through dehydrogenation, which comprises an alcohol tower, a dehydrogenation heat exchanger, a dehydrogenation reactor, an alcohol tower feeding heat exchanger, a dehydrating tower, a light tower I, a light tower II, a ketone tower and an alcohol recovery tower which are connected in sequence, a middle feeding port of the alcohol tower is communicated with a tube pass discharging port of the alcohol tower feeding heat exchanger, a top discharging port of the alcohol tower is communicated with a tube pass feeding port of the dehydrogenation heat exchanger, a bottom discharging port of the alcohol tower is communicated with a middle feeding port of the alcohol recovery tower, and an alcohol ketone drying tower is additionally arranged between the alcohol tower feeding heat exchanger and the dehydration tower. A feed port of the alcohol ketone drying tower is communicated with a shell pass discharge port of the alcohol tower feed heat exchanger, and a liquid phase discharge port of the alcohol ketone drying tower is communicated with an upper feed port of the dehydrating tower. The alcohol tower adopts a process that raw materials directly enter the tower top, tower top reflux is cancelled, steam consumption is reduced, and the purpose of saving energy is achieved.

The present invention discloses a catalyst for dehydrogenating cyclohexanol to cyclohexanone, a preparation method thereof and an application thereof. The catalyst comprises a silica support and active components and active promoters uniformly loaded on the silica support; the active components include copper element, zinc element and magnesium element; the active promoter is selected from borate. The catalyst for dehydrogenating cyclohexanol to cyclohexanone disclosed by the present invention greatly enhances the interaction between the silica support and the active components, and significantly improves the long-term stability of the catalyst on the basis of ensuring that the catalyst has excellent catalytic activity and selectivity.

The invention provides a copper-nickel alloy catalytic electrode and a preparation method and application thereof. The copper-nickel alloy catalytic electrode comprises a foamed nickel substrate and a copper-nickel alloy vertically loaded on the surface of the foamed nickel substrate, the molecular formula of the copper-nickel alloy is Cu < 0.81 > Ni < 0.19 >, and the copper-nickel alloy is of a dendritic nanostructure. The preparation method comprises the following steps: adding copper sulfate, nickel sulfate and ammonium sulfate into water, and uniformly stirring to obtain an electrolyte; taking a foamed nickel substrate as a working electrode, taking a saturated silver-silver chloride electrode as a reference electrode, taking a platinum sheet or a graphite rod electrode as a counter electrode, and applying constant current density to the working electrode to obtain a preset electrode; and alternately cleaning the preset electrode by using ethanol and distilled water, and carrying out vacuum drying to obtain the copper-nickel alloy catalytic electrode. According to the prepared copper-nickel alloy catalytic electrode, the copper-nickel alloy is in a dendritic morphology, has abundant active sites and a high specific surface area, and has excellent catalytic activity and stability in hydrogen preparation by coupling hydrogen evolution reaction for synthesizing adipic acid through electro-catalysis of cyclohexanone.

The invention relates to the technical field of chemical separation, in particular to a cyclohexanone rectification and purification method based on high-tower segmented packing, which comprises the following steps: step 1, filtering a cyclohexanone raw material containing impurities to remove solid particles, and dynamically adjusting the filtering precision according to the viscosity of the raw material; 2, arranging a bottom section, a middle section and a top section in the vertical high tower; the temperature gradient of each section is regulated and controlled through an independent temperature control unit, so that the temperature gradient of the middle section is matched with the relative volatility of the cyclohexanone-light component; 3, dynamically adjusting the reflux ratio based on the real-time detection result of the purity of the tower top distillate, and controlling an intermittent discharge valve according to the density change of the tower bottom heavy component enrichment liquid so as to continuously remove the heavy components; and 4, recycling the waste heat of the steam at the top of the tower for preheating the raw materials, and inhibiting the tower pressure fluctuation through a buffer tank. Through the innovative design of sectional packing of the high tower, the separation efficiency is improved, the energy consumption is reduced, and meanwhile, the equipment reliability is improved.

The invention discloses an anti-adhesion membrane loaded with nintedanib and a preparation method of the anti-adhesion membrane loaded with the nintedanib. The anti-adhesion membrane loaded with the nintedanib is prepared from a drug-loading substrate material and the nintedanib through electrostatic spinning, the material of the drug-loading substrate is one or more of polylactic acid, poly (p-dioxanone), a polylactic acid-glycolic acid copolymer, polycaprolactone and polyethylene glycol; a solvent adopted in the electrostatic spinning is hexafluoroisopropanol, and the voltage adopted in the electrostatic spinning is 10-14 kV. The nintedanib-loaded anti-adhesion membrane has the advantages that the tensile strength and the elongation at break are obviously improved, the mechanical property is obviously improved, the fiber distribution is uniform, the obvious anti-adhesion effect is realized, the nintedanib-loaded anti-adhesion membrane is suitable for common laparotomy, and the application prospect is wide.

The invention relates to a spherical chiral covalent organic framework and a preparation method and application thereof.The spherical chiral covalent organic framework is a spherical chiral L-DTP-TAPB COF material containing a proline fragment, and the L-DTP-TAPB COF material has high crystallinity and spherical morphology, contains rich tetrahydropyrrole chiral catalytic sites, and has the advantages of being high in catalytic activity and high in catalytic activity. The catalyst can be applied to asymmetric aldol reaction and shows excellent catalytic activity. In catalysis of a reaction of p-nitrobenzaldehyde and cyclohexanone, the reaction yield is up to 96%, the ee value can reach 87%, and the catalytic performance of the chiral COFs and chiral metal organic framework catalysts is higher than that of most reported chiral COFs and chiral metal organic framework catalysts. And meanwhile, excellent recycling performance is also shown.

The invention relates to the technical field of organic synthesis, and provides a method for efficiently preparing 1, 3-cyclohexanedione through selective hydrogenation, which comprises the following steps: preparing hexagonal mesoporous silicon oxide by taking tetraethoxysilane as a silicon source and dodecylamine as a structure-directing agent, compounding the hexagonal mesoporous silicon oxide with titanium oxide to obtain a carrier, and taking palladium as a catalytic active component to prepare a catalyst I; preparing a copper-based coordination polymer by taking copper chloride dihydrate and phenylacetylene as raw materials; preparing a catalyst II by taking nickel as a catalytic active component; the method comprises the following steps: reacting resorcinol with hydrogen under the combined action of alkali, water, a catalyst I and a catalyst II, and then acidizing and recrystallizing to obtain the target product 1, 3-cyclohexanedione. According to the method, resorcinol is taken as a raw material, the self-made catalyst I and the self-made catalyst II are adopted for concerted catalytic hydrogenation, 1, 3-cyclohexanone with relatively high purity is prepared, and the catalysts are high in catalytic activity, easy to separate and still have very good catalytic performance after being recycled for multiple times.

The invention relates to a method for preparing cyclohexanone by conversion of acetone and 1, 3-propylene glycol, and belongs to the technical field of chemical engineering. The method comprises the following steps: catalyzing a dialkylation reaction of acetone and 1, 3-propylene glycol by virtue of a supported nickel or palladium catalyst and a potassium phosphate cocatalyst, and removing water from acetone and 1, 3-propylene glycol which are equal in molar weight, so as to obtain cyclohexanone. The method contributes to the production of bulk chemicals and fine chemicals by a fermentation method, and makes a contribution to the strategic goal of low-carbon development.

The invention relates to the technical field of chemical catalysis, in particular to a copper-silicon catalyzed cyclohexanol gradient dehydrogenation and hydrogen recycling method which comprises the following steps: step 1, preparing a gradient catalyst, namely carrying out surface hydroxyl regulation pretreatment on porous silica gel, and loading a copper salt solution by adopting a step-by-step impregnation method to form gradient distribution with gradually decreased copper loading capacity from outside to inside, carrying out segmented heating reduction in a reducing atmosphere containing 5vol% of H2 / N2; 2, gradient dehydrogenation reaction process control; and 3, hydrogen in-situ separation and cyclic utilization: separating hydrogen from the reaction outlet gas through a palladium alloy membrane, controlling the pressure difference of the two sides of the membrane to maintain the permeation flux, returning the separated hydrogen to the inlet of the reactor to adjust the hydrogen partial pressure, and storing the residual hydrogen. Through gradient catalyst preparation, accurate reaction process control and efficient hydrogen recovery technologies, the cyclohexanone production efficiency is improved, and long-term stability of the catalyst and efficient recycling of hydrogen are achieved.

The invention discloses a separation method of a phenol-cyclohexanone azeotropic system, a separation system and application. The separation method comprises the following steps: separating a material containing phenol, cyclohexanone and impurities and a material containing an extraction agent in an extractive distillation tower, and extracting the material containing cyclohexanone from the tower top; extracting a material containing phenol, impurities and an extracting agent from the tower kettle; the impurities comprise at least one of cyclohexylbenzene, ketal and a ketal dehydration product; feeding the material containing phenol, impurities and the extraction agent into a solvent recovery tower for separation, and extracting the material containing phenol from the tower top; a material containing the extraction agent and impurities is extracted from the side line of the tower and is cooled and separated by a phase splitter to obtain a light-phase material containing the impurities and a heavy-phase material containing the extraction agent; the heavy-phase material containing the extraction agent flows back to the solvent recovery tower and then flows back to the extractive distillation tower, so that recycling of the extraction agent is realized, the investment economic cost of the extraction agent is effectively saved, and the condition that the extraction agent needs to be regularly discharged as fuel or post-treated in the prior art is avoided.

The invention discloses a method for preparing cyclohexylamine based on reductive amination of cyclohexanone, and belongs to the technical field of fine chemical engineering. The preparation method comprises the following steps: adding a reactant cyclohexanone into a reaction kettle containing a certain amount of solvent, ammonia water and hydrogen atmosphere, and carrying out reductive amination reaction in the presence of a catalyst to obtain cyclohexylamine. The catalyst is CoyAl-LDHs loaded with metal active components, the CoyAl-LDHs are layered cobalt-aluminum bimetal hydroxides, and cobalt ions and precious metal ions in laminates are subjected to spontaneous oxidation-reduction reaction, so that the precious metal ions can be efficiently reduced into active metal nanoparticles. The layered cobalt-aluminum double-metal hydroxide not only has abundant surface acid-base sites, but also has high dispersity of loaded metal nanoparticles. The catalyst preparation and reductive amination reaction conditions are mild, the yield is high, the reaction system is simple and easy to separate, and the method is suitable for industrial production of cyclohexylamine.

The invention discloses a high molecular weight poly (p-dioxanone) (PPDO) microsphere as well as a preparation method and application thereof. By adopting a double emulsification-solvent evaporation method, an amphiphilic polymer, such as poly (p-dioxanone) (PDO) or a copolymer of PDO and a hydrophilic fragment (such as mPEG and mPPG), is utilized to perform self-assembly on a two-phase interface formed by emulsification under the combined action of amphipathy and polyvinyl alcohol (PVA) to form a double-micelle protective layer, so that the degradation effect of water on PPDO in the microsphere forming process is effectively blocked, and the PPDO can be effectively degraded. And finally, the high-molecular-weight poly (p-dioxanone) microspheres with stable performance are obtained, so that the high-molecular-weight PPDO microspheres have long-term stability. The preparation method is high in operability, mild in condition and suitable for large-scale production, high-molecular-weight poly (p-dioxanone) microspheres are obtained, and the preparation method has wide application prospects in the aspects of tissue filling agents, drug carriers, tissue scaffolds and the like.

The invention discloses a method for purifying p-dioxanone, which comprises the following steps of: fully mixing a p-dioxanone crude product with certain purity with a certain amount of extracting solvent at a temperature higher than the melting point of the p-dioxanone, standing and layering at a certain temperature after mixing, and separating to obtain the p-dioxanone. And after the layering is finished, reducing the temperature of the system to below the melting point of p-dioxanone, starting crystallization, filtering after the crystallization is finished, and removing the solvent in the crystal to obtain the high-purity p-dioxanone product. The invention also relates to a device for carrying out such a purification method.

The present invention provides a device for refining cyclohexanone by dehydrogenation of cyclohexanol, comprising an alcohol first tower, a dehydrogenation reactor, a dehydrogenation heat exchanger, an alcohol tower feed heat exchanger, a light first tower, a coupled reboiler, a light second tower, a ketone tower, and an alcohol second tower. The device of the present invention redesigns the six-tower process to achieve the refining and separation of cyclohexanol dehydrogenation materials, and couples and utilizes the available heat source and cold source. Using the device of the present invention to purify cyclohexanone can improve the product yield while saving steam consumption, reducing the operating cost of the device, and reducing the discharge of three wastes.

The invention provides a fluorescent probe for detecting hydroxyl radicals as well as a preparation method and application thereof, and the preparation method comprises the following steps: (S10) synthesizing a first intermediate compound by taking 2, 3, 3-trimethyl-3H-indoline and methyl iodide as raw materials; (S20) synthesizing a second intermediate compound by taking phosphorus trichloride, cyclohexanone and anhydrous dimethylformamide as raw materials; (S30) mixing and reacting the first intermediate compound and the second intermediate compound to synthesize a compound IR780; and (S40) synthesizing OH-probe on the basis of the IR780. The prepared OH-probe has extremely high sensitivity and excellent selectivity on hydroxyl radicals, can be effectively used for monitoring and mapping the level of the hydroxyl radicals, and can be applied to detection of atherosclerosis, obesity, cancers, neurodegenerative diseases, inflammatory diseases and other free radical related diseases. Wide development prospects and practical application values are realized.

The invention discloses a method for efficiently co-producing benzoquinone and cyclohexanone based on electrochemical oxidation / reduction of phenol, which adopts an acid-base mixed electrochemical electrolytic tank, the anode electrolyte is alkaline electrolyte, the cathode electrolyte is acidic electrolyte, the anode electrode is nickel foam loaded with nickel sulfide-nickel oxide composite nanosheets, and the cathode electrode is nickel foam loaded with nickel sulfide-nickel oxide composite nanosheets. The cathode electrode is a palladium-nickel-boron nanoparticle alloy with nitrogen-doped porous carbon as a carrier, and the anode electrolyte and the cathode electrolyte are separated by a bipolar membrane; the phenol is added into the anolyte and the catholyte, so that the phenol is electrochemically oxidized by the anode to generate an additional product benzoquinone with high economic value, and meanwhile, the phenol is catalyzed by the cathode to be reduced to generate an additional product cyclohexanone with high economic value. The whole system only needs to consume acid and alkali, the method has the advantages of being good in environmental protection effect and considerable in capacity, and the electrochemical electrolytic tank is good in stability, simple in preparation method, low in cost and easy to achieve large-scale production and has the potential to be applied to large-scale treatment of acid and alkali wastewater containing phenol in industry.

The invention discloses a bio-based gemini quaternary ammonium salt compound as well as a preparation method and application thereof. The bio-based gemini quaternary ammonium salt compound is a compound with a structural formula as shown in a formula I, wherein R1 is selected from one of cyclohexanone, cyclopentanone, acetone, 2-octanone and 2-pentanone; r2 is selected from C4-C24 alkyl groups (except C19 and C21); x is at least one of Cl, I and Br. The bio-based gemini quaternary ammonium salt compound disclosed by the invention takes 5-hydroxymethylfurfural as a raw material, has a furan ring, a quaternary ammonium salt substituent group and a long alkyl chain in the structure and can be used as a corrosion inhibitor, and a quaternary ammonium salt functional group and an alkyl long chain are constructed in the structure and respectively serve as a hydrophilic functional group and a hydrophobic functional group, so that the biological activity of the compound is improved. When the gemini quaternary ammonium salt corrosion inhibitor is in contact with steel (metal), a protective film can be formed on the surface of the steel (metal), so that the effect of protecting the steel (metal) is achieved, the corrosion speed of the steel (metal) is slowed down, and the economic benefit is extremely high; # imgabs0 #

The invention provides a toughened polylactic acid blend as well as a preparation method and application thereof, and belongs to the technical field of new materials. According to the invention, poly (p-dioxanone), chitin, polymethyl acrylate, glycerol, polycaprolactone, epoxypropane and polymethyl methacrylate in a specific ratio are adopted as a modified composite material, and the modified composite material and polylactic acid are subjected to melt blending under specific conditions to realize toughening modification of a polylactic acid material. Experiments prove that the toughening type polylactic acid blending material prepared by the method can effectively improve the toughness of polylactic acid, can also improve the degradation speed of polylactic acid, and has a wide application prospect.

The invention relates to a cyclohexanone concentration real-time monitoring and automatic adjusting method and system in the technical field of semiconductors, and the method comprises the steps: comparing a smoothed concentration value with a preset threshold value, if the concentration value exceeds a safety range, generating an abnormal signal, recording a timestamp, and determining a condition for triggering subsequent operation through the abnormal signal; after the abnormal signal is obtained, an instruction is sent to the control module, the water supplementing and liquid discharging device is activated according to instruction content, whether operation is successfully executed or not is judged from device state feedback, and execution result data is obtained; analyzing response time and flow change of the water replenishing and liquid discharging device through execution result data, updating control parameters by adopting a dynamic adjustment algorithm, and determining an accurate instruction of next operation according to the updated parameters; and extracting continuous concentration change trend data from the concentration monitoring module, judging whether the system is recovered to a safe range or not according to the change trend, and obtaining a current stability evaluation value.

The invention discloses a method for green and safe synthesis of epsilon-caprolactone from cyclohexanone, and belongs to the technical field of heterocyclic compound and organic chemical raw material manufacturing, and the method comprises the following steps: oxidizing and converting cyclohexanone into a mixture aqueous solution of epsilon-caprolactone, 6-hydroxyhexanoic acid and 6-hydroxyhexanoic acid linear oligomers / oligomers, removing peroxides in the mixture aqueous solution, and obtaining the epsilon-caprolactone. The method comprises the following steps: carrying out polycondensation on a mixture of epsilon-caprolactone, 6-hydroxycaproic acid and a 6-hydroxycaproic acid linear oligomer / oligomer so as to convert the mixture into the 6-hydroxycaproic acid linear oligomer / oligomer, and depolymerizing the 6-hydroxycaproic acid linear oligomer / oligomer so as to convert the 6-hydroxycaproic acid linear oligomer / oligomer into epsilon-caprolactone or / and epsilon-caprolactone cyclic dimer. According to the method, cyclohexanone and hydrogen peroxide are used as reaction raw materials, the organic peroxide is prepared in a non-centralized manner in the whole route, and an organic solvent is not used, so that the combustion and explosion risks caused by the use of a large amount of organic peroxide and organic solvent are greatly reduced, and the yield of epsilon-caprolactone is improved through a polycondensation-depolymerization scheme.

The invention discloses 1, 2-dibromo-6-tert-butyl-9-(4-tert-butylphenyl)-9H-carbazole and a synthesis method of the 1, 2-dibromo-6-tert-butyl-9-(4-tert-butylphenyl) The method comprises the following steps: taking 3-nitrophthalic acid as an initial raw material, reacting trichloroisocyanuric acid with liquid bromine to obtain 1, 2-dibromo-3-nitrobenzene, reducing by stannous chloride to obtain 2, 3-dibromoaniline, carrying out diazotization reaction to obtain 2, 3-dibromophenylhydrazine, reacting with p-tert-butyl cyclohexanone, and reacting by using 2, 3-dichloro-5, 6-dibromophenylhydrazine to obtain 2, 3-dibromophenylhydrazine. The preparation method comprises the following steps: carrying out dehydrogenation on 2, 6-dicyanobenzoquinone to obtain 1, 2-dibromo-6-tert-butyl-9H-carbazole, and finally reacting the 1, 2-dibromo-6-tert-butyl-9H-carbazole with 4-tert-butyl iodobenzene to obtain the 1, 2-dibromo-6-tert-butyl-9-(4-tert-butylphenyl)-9H-carbazole. Due to the existence of a bromine atom functional group on the 1, 2-dibromo-6-tert-butyl-9-(4-tert-butylphenyl)-9H-carbazole, the further conversion of the compound has expandability, and the compound can be used as a material / drug molecule precursor in the fields of organic light-emitting semiconductors, pharmaceutical chemistry and the like.

The invention discloses a super-hydrophobic self-repairing composite film for deicing fan blades and a preparation method of the super-hydrophobic self-repairing composite film. Isocyanate-based polyurethane and a hydroxyl-containing shape memory polymer are dissolved in cyclohexanone, and a mixed solution is obtained; spin-coating the mixed solution on the surface of glass fiber reinforced resin to form a substrate layer; uniformly mixing a microcapsule material and vinyl epoxy resin in methyl ethyl ketone, and spin-coating the mixture on the substrate layer to form a functional layer; and spraying the modified nano SiO2 particle suspension onto the functional layer to obtain the super-hydrophobic layer. The composite film has long-acting anti-icing performance, the self-repairing function of the composite film can cope with mechanical wear and environmental erosion, the shape memory polymer cooperates with pneumatic stripping of an ice layer through temperature triggering deformation, meanwhile, the nano structure enhances wear resistance and chemical inertness, and the composite film adapts to extreme environments such as low temperature and high humidity. The process is green and efficient, raw materials are easy to obtain, the operation and maintenance cost is remarkably reduced, and intelligent and sustainable anti-icing protection is provided for the fan blade.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a method for preparing caprolactone, in particular to a method for continuously preparing caprolactone. The method comprises the following steps: (1) mixing a peroxy acid synthesis solution containing an acidic catalyst with a stabilizer which is a nitrogen-containing alkaline compound and has lone pair electrons on an N atom; and (2) respectively inputting cyclohexanone and the mixed solution obtained in the step (1) into a microreactor to carry out a first reaction, and then introducing a product obtained by the first reaction into a tubular reactor to carry out a second reaction. By adopting the method for preparing the caprolactone, the stability and safety of the reaction can be improved, meanwhile, the conversion rate of the cyclohexanone is increased, the conversion rate of the cyclohexanone is 99.5% or above, and the selectivity of the prepared caprolactone is gt; the content is 99.5%.

The invention belongs to the field of polymer films, and discloses a polyvinylidene fluoride film based on cross-linking reaction and a preparation method and application thereof, and the preparation method comprises the following steps: mixing cyclohexanone, polyvinylidene fluoride and polyoxyethylene diamine to obtain a mixed solution; curing the mixed solution into a film to obtain a blended polyvinylidene fluoride film; and carrying out cross-linking reaction on the blended polyvinylidene fluoride film to obtain a cross-linked polyvinylidene fluoride film, and culturing the cross-linked polyvinylidene fluoride film at 150-165 DEG C to obtain the polyvinylidene fluoride film with high gamma crystal form content. Through detection and comparison, in the polyvinylidene fluoride film based on the cross-linking reaction, the gamma-phase crystal content is obviously increased, and the alpha-phase crystal content is obviously reduced. The method is simple in process and convenient to operate, polyvinylidene fluoride is endowed with the capacity of obtaining gamma crystals at a low temperature in a short time, and the method can be widely applied to the fields of pressure sensors, lithium ion batteries, automobile motors, high-temperature-resistant thermistor devices and the like.

The invention discloses a synthetic method of a fluorescent dye, which comprises the following steps: A, dropwise adding POCl3 into DMF (Dimethyl Formamide) at the temperature of 0 DEG C under the condition of protective atmosphere and stirring, and fully reacting; continuously dropwise adding cyclohexanone, heating, stirring, fully reacting, adding the reaction liquid into ice water, and separating out a solid first compound; b, under the protective atmosphere, stirring and refluxing p-sulfonyl phenylhydrazine, 3-methyl-2-butanone and acetate in acetic acid to react completely, cooling the reaction liquid to-10 to 5 DEG C, stirring, and separating to obtain a second compound; c, under the protective atmosphere, after the second compound and 1, 4-butanesultone are stirred, refluxed and completely reacted in xylene, separating to obtain a third compound; and D, stirring and refluxing the third compound, the first compound and acetate in methanol at the temperature of 80 DEG C under the conditions of protective atmosphere and light shielding, simultaneously dropwise adding acetic anhydride, cooling to room temperature after full reaction, and separating and purifying. According to the scheme, the synthesis process is simple and efficient, and high-quality synthesis of the target dye S0456 is effectively realized.

The utility model discloses a protective device for a joint of a gas pipeline. Comprising a pipe sleeve, an upper fixing screw sleeve spirally connected to the upper portion of the pipe sleeve, a lower fixing screw sleeve spirally connected to the lower portion of the pipe sleeve, a connecting plate attached to the inner side of the opening side of the pipe sleeve, a connecting mechanism arranged between the pipe sleeve and the connecting plate, and a protection mechanism fixedly connected to the inner wall of the connecting plate. In the protective device for the gas pipeline joint, the pipe sleeve is coated with epoxy resin and cyclohexanone, and the waterproof surface layer and the flame-retardant surface layer are arranged, so that the service life of the protective device is prolonged, and the protective device has higher contractility, creep resistance, aging resistance, impact resistance, heat resistance and the like, and has good chemical corrosion resistance, water soaking resistance, water vapor permeation resistance and the like; the service life is the same as that of the pipeline.

The invention belongs to the technical field of pesticide preparations, and relates to a preparation method and application of prothioconazole sustained-release microspheres. The preparation method comprises the following steps: adding an active compound, an emulsifier, isocyanate and polycaprolactone polyol into cyclohexanone, and uniformly mixing to obtain an oil phase; adding a dispersing agent into water and uniformly mixing to obtain a water phase; and adding dibutyltin dilaurate into the oil phase, reacting, mixing with the water phase, shearing, and stirring to obtain the prothioconazole sustained-release microsphere suspending agent. The prothioconazole sustained-release microsphere prepared by the process still keeps higher bactericidal activity on the premise of good leaf surface stability, so that reduction of the pesticide application frequency, improvement of the pesticide utilization rate and long-acting prevention and control of prothioconazole in the field are expected to be realized, and the prothioconazole sustained-release microsphere conforms to the national double reduction policy and is suitable for large-scale popularization and application.