423 results about "Butyraldehyde" patented technology

The invention relates to the technical field of functional materials, in particular to a polyvinyl butyral flexible material as well as a preparation method and application thereof. The molecular chain regularity is destroyed through an isobutyraldehyde branched chain, the crystallinity is reduced, and the flexibility is improved; cesium-tin co-doped tungsten oxide has high infrared rejection rate and good dispersity, and the influence on the flexibility of the material is reduced; magnesium salicylate and magnesium formate are compounded, so that the reaction activity with resin is reduced, and the bonding stability in the bending process is ensured; the flexibility and migration resistance of the material are synergistically improved through the flexible plasticizer, and the interlayer sheet is prevented from being sticky; the flexible reinforcing agent polycaprolactone micro powder is used for forming an elastic node, bending stress is absorbed, and the recovery performance is improved. The polyvinyl butyral flexible material provided by the invention has flexible bending performance, an efficient infrared barrier function and stable bonding performance, is suitable for scenes such as curved building curtain walls, special-shaped automobile sunroofs or arc-shaped rail traffic windows, and has a wide application prospect.

The invention discloses a pH response Ti < 3 > C < 2 > T < x >-based polyvinyl butyral self-repairing anti-corrosion coating and a preparation method thereof. The preparation method comprises the following steps: preparing Ti < 3 > C < 2 > T < x > (at) PDA by polymerizing dopamine on the surface of a Ti < 3 > C < 2 > T < x > (at) PDA, loading Ce-P-I < m >-MOF onto the Ti < 3 > C < 2 > T < x > (at) PDA, finally mixing into polyvinyl butyral-methanol, and coating on the surface of a copper plate to obtain the pH-responsive Ti < 3 > C < 2 > T < x >-based polyvinyl butyral self-repairing anticorrosive coating. Wherein PDA has the dual effects of improving the dispersibility and oxidation resistance of Ti3C2Tx and inhibiting corrosion promotion; imidazole in Ce-P-Im-MOF responds to the pH change of a corrosion area through redox cycle, cerium ions and phosphate radicals are dynamically released to form a passivation film, the Ti3C2Tx nanosheet labyrinth effect is overlaid, a'dynamic passivation-physical shielding-conductive regulation 'triple anti-corrosion mechanism is formed, and the corrosion resistance of a matrix is remarkably improved.

The invention relates to the technical field of PVB (polyvinyl butyral) films, in particular to a full-wave-band heat-shielding modified PVB composite film as well as a preparation method and application thereof. The full-band heat shielding modified PVB composite film provided by the invention is of an asymmetric structure and comprises a modified PVB matrix and a heat shielding coating covering one side of the modified PVB matrix, the modified PVB matrix is prepared from the following components: polyvinyl butyral and an epoxy silane coupling agent; the heat shielding coating comprises the following components: CsWO3 nano powder, ZnO nano powder, water-based acrylic resin and a composite dispersion system; the composite dispersion system comprises triethylene glycol di-2-ethylhexoate, polyvinylpyrrolidone and diethylene glycol monobutyl ether. The full-wave-band heat shielding modified PVB composite film provided by the invention can realize 780-2500nm full-wave-band near-infrared high-efficiency barrier, improve the binding force and performance stability of a heat shielding coating, and meet the production requirements of light weight, environmental protection and industrialization at the same time.

The low-VOC modified melamine formaldehyde resin is prepared from the following components in parts by weight: 80 to 100 parts of melamine formaldehyde resin, 5 to 10 parts of hydroxyl-terminated hyperbranched polyester, 8 to 15 parts of epoxy-terminated polybutadiene, 1 to 3 parts of fumed silica, 5 to 15 parts of polyvinyl butyral, 0.1 to 0.2 part of a coupling agent, 1 to 3 parts of a catalyst and 2 to 5 parts of a cross-linking agent, the preparation method comprises the following steps: in a stirring state, adding hydroxyl-terminated hyperbranched polyester, epoxy-terminated polybutadiene, a polyvinyl butyral resin solution and coupling agent modified fumed silica into a melamino-formaldehyde resin solution, heating to 50-70 DEG C, and adding a catalyst and a cross-linking agent; the melamine modified resin prepared by the components and the preparation method has the characteristics of low formaldehyde volatilization, high toughness and durability.

The invention discloses a gas diffusion layer with a gradient pore structure and a preparation method of the gas diffusion layer. The preparation method comprises the following steps: 1, immersing a titanium diamond net into liquid paraffin; 2, absolute ethyl alcohol, tributyl phosphate, polyvinyl butyral and two kinds of spherical titanium powder with different granularities are evenly mixed to prepare second slurry containing coarse-grained spherical titanium powder and first slurry containing fine-grained spherical titanium powder, and the second slurry and the first slurry are sequentially sprayed to the surface of the titanium rhombus net filled with paraffin; and 3, degreasing and sintering the sprayed titanium diamond net for one-step forming to obtain the gas diffusion layer with the gradient pore structure. According to the method, the slurry containing the spherical titanium powder with the coarse granularity and the spherical titanium powder with the fine granularity is sequentially sprayed on the titanium diamond net and sintered, the gas diffusion layer with the gradient hole structure is obtained, it is guaranteed that the gas diffusion layer has the high catalyst utilization rate, high mechanical strength and good gas-liquid transmission, and the structure can be adjusted according to the actual working condition so as to regulate and control the performance of the gas diffusion layer; the method is suitable for the field of PEM electrolytic hydrogen production.

The invention relates to a preparation method of quartz sand, and belongs to the technical field of quartz. The preparation method comprises the following steps: S1, adding a polyvinyl butyral solution into silica sol, and uniformly stirring to obtain silica sol dispersion liquid; the polyvinyl butyral solution comprises polyvinyl butyral (PVB) and tert-butyl alcohol; s2, performing spray drying on the silica sol dispersion liquid to obtain quartz microspheres; and S3, carrying out oxidation carbon removal treatment and vacuum dehydroxylation treatment on the quartz microspheres to obtain the quartz sand. Drying cracking and micro-hollow structure defects of the quartz sand can be effectively eliminated, it is ensured that the product is compact and free of pores, and the structural integrity and the use reliability are greatly improved; the density performance bottleneck of quartz sand is successfully broken through, and the bulk density after sintering is remarkably improved; the particle size distribution of the quartz sand can be accurately controlled, and the product particle size uniformity is ensured.

The invention belongs to the technical field of preparation of barium titanate, and particularly relates to a preparation method of a defect-regulating barium titanate composite material, which comprises the following preparation steps: S1, adding a proper amount of barium carbonate, titanium dioxide, nickel oxide and dopant mixed powder into a ball milling tank for ball milling to obtain initial barium titanate composite particles; s2, dispersing the initial barium titanate composite particles obtained in the step S1 into an aqueous solution of a growth inhibitor for reaction to form modified barium titanate composite powder; and S3, mixing the barium titanate composite powder obtained in the step S2 with an adhesive polyvinyl butyral, pressing into a biscuit, performing cold isostatic pressing, sintering, annealing in a nitrogen atmosphere, and performing heat preservation to obtain the defect-regulated barium titanate composite material.

The invention discloses a water-based environment-friendly coating and local printing transfer paper thereof, and particularly relates to the technical field of water-based environment-friendly coatings. The water-based environment-friendly coating is prepared from a water-based epoxy ester dispersion, an organic silicon modified polyvinyl butyral emulsion, a gas-phase method aluminum oxide nano dispersion, a fluorocarbon surfactant, a self-crosslinking polyether thickening agent and a propylene glycol methyl ether acetate-water azeotropic quick-drying auxiliary agent. According to the coating, through cooperation of specific components and process control, the drying speed is remarkably increased, the surface drying time is shortened, meanwhile, shrinkage cavities are eliminated, the hardness of the coating is enhanced, and the edge transfer precision is improved. Corona treatment is adopted for the corresponding local printing transfer paper, gravure precise coating, infrared pre-drying and gradient hot air drying are matched, and finally clear separation and transfer of a coating are achieved through infrared laser scanning. The whole system is a water-based formula, is environment-friendly and safe, is suitable for the field of high-end printing, and has the comprehensive advantages of high drying speed, high precision, strong adhesive force, simplified process and the like.

The invention relates to the field of layered composite fabrics, and discloses a cooling and heat-insulating layered composite fabric and a preparation method thereof. The composite fabric has a multi-layer structure of a coating and a fabric layer, silicon dioxide microsphere loaded maleic anhydride modified PVB and organic silicon modified polyurethane acrylate are introduced into the coating, a light-oxygen dual-curing system is constructed, and silicon dioxide, polyvinyl butyral and polydimethylsiloxane which are good in intrinsic infrared emission performance are introduced, so that the intrinsic infrared emission performance of the composite fabric is improved, and the intrinsic infrared emission performance of the composite fabric is improved. The cooling performance of the coating material is improved through multi-component synergism of nano Al2O3 with good heat reflection performance, and the cooling and heat insulation performance of the composite fabric is comprehensively improved by combining the excellent heat insulation performance of the special-shaped cross-section fibers in the fabric layer.

The invention relates to the field of polymer composite materials, and discloses a high-strength meteorological antirust rope material, which comprises the following raw materials by weight: 20-35 parts of a vapor phase corrosion inhibitor; 35 to 50 parts of a matrix material; 10 to 18 parts of a reinforcing phase; 2-4 parts of a barrier material; 8 to 12 parts of a toughening agent; 0.3 to 0.7 part of a dynamic vulcanization cross-linking agent; the vapor phase corrosion inhibitor is a compound of benzimidazole and ionic liquid, wherein the molar ratio of benzimidazole to ionic liquid is (1: 1.5)-(1: 2.5); the base material is polyvinyl butyral, the molecular weight of the base material is 40,000 to 70,000 g / mol, and the acetyl content of the base material is 18 to 22 percent. A benzimidazole / ionic liquid composite corrosion inhibitor is loaded in a pore channel of aminated mesoporous silica in a confined manner, and directional release of corrosion inhibitor molecules on a metal interface is realized by combining ultrasonic dispersion and centrifugal separation processes.

The invention relates to the technical field of high polymer materials, and particularly discloses a water-soluble polyvinyl butyral emulsion and a preparation method thereof.The preparation method comprises the following preparation steps that dissolving is conducted, PVB and ethyl alcohol are dissolved, the dissolving temperature ranges from 50 DEG C to 60 DEG C, the dissolving time ranges from 1 h to 3 h, and a dissolving solution is obtained; base catalytic emulsification: sequentially adding a composite plasticizer and a composite emulsifier into the obtained dissolved solution, stirring and mixing, then slowly dropwise adding alkali liquor into a reaction system, and reacting for 0.2-0.8 hour to obtain primary emulsion; shearing and emulsifying: adding the acrylate core-shell emulsion into the obtained primary emulsion, and then carrying out high-speed shearing and emulsifying to obtain a composite emulsion; and adding a compound thickening agent into the obtained composite emulsion, and stirring for at least 20 minutes to obtain the network-shaped water-soluble polyvinyl butyral emulsion.

The utility model provides an ultra-low carbon butyraldehyde synthesis device which comprises an enhanced reaction tower, an enhanced unit is arranged at the bottom of the enhanced reaction tower, and a grating is arranged above the enhanced unit; a mixed gas feed port and a propylene feed port are formed in the bottom of the enhanced reaction tower, a discharge port and a reflux pipeline are further arranged on the tower side of the enhanced reaction tower, and a circulating pump is arranged on the reflux pipeline; a catalyst recovery pipeline is arranged on the outer side of the enhanced reaction tower, the catalyst recovery pipeline is connected with the enhanced reaction tower through the discharge port, and the catalyst recovery pipeline comprises a heat exchanger, a sedimentation tank and a gas washing tower which are connected in sequence. According to the butyraldehyde synthesis device disclosed by the utility model, the reaction efficiency and the product yield in butyraldehyde synthesis are improved by mainly combining the strengthening unit and the catalyst recovery pipeline, so that the reaction is more sufficient and thorough, the catalyst recovery rate is higher, and the energy consumption in catalyst recovery is greatly reduced.

The invention relates to the technical field of alcohol preparation through aldehyde hydrogenation, in particular to a butyraldehyde, valeraldehyde and 2-propyl heptanal liquid-phase hydrogenation method and device, the device comprises a liquid-phase hydrogenation reactor, butyraldehyde, valeraldehyde and PBA, the liquid-phase hydrogenation reactor comprises an inner core pipe filled with a hydrogenation catalyst and an outer annular bed, and the outer annular bed is filled with a hydrogenation catalyst. The method is characterized in that butyraldehyde, valeraldehyde and PBA generated by an aldehyde-aldehyde condensation reaction are respectively fed into a hydrogenation system, the reactions of generating 2-propyl heptanol through PBA hydrogenation, generating butanol through butyraldehyde hydrogenation and generating pentanol through valeraldehyde hydrogenation are carried out in a liquid phase, and the pressure is about 2.4 MPa. Compared with gas-phase hydrogenation in the prior art, the liquid-phase hydrogenation adopted in the method has the advantages that the energy consumption is lower; the problem of high energy consumption of gas phase hydrogenation is solved.

The invention discloses a basalt fiber reinforced asphalt mixture based on solid waste synergy and a preparation method of the basalt fiber reinforced asphalt mixture, and belongs to the field of asphalt mixtures. The basalt fiber reinforced asphalt mixture based on solid waste synergy is prepared from the following raw material components in parts by mass: 1000 to 1200 parts of aggregate, 3 to 5 parts of modified basalt fiber, 50 to 73 parts of waste rubber modified asphalt, 2 to 4.38 parts of amphiphilic epoxy resin, 0.7 to 1.5 parts of curing agent and 0.06 to 0.13 part of accelerant, the modified basalt fiber is obtained by modifying triethoxysilyl butyraldehyde, 3-mercaptopropyltrimethoxysilane and allyl-1, 3-sultone, and the modified basalt fiber is prepared by modifying the triethoxysilyl butyraldehyde, the 3-mercaptopropyltrimethoxysilane and the allyl-1, 3-sultone; the amphiphilic epoxy resin is obtained by reacting dodecyl succinic anhydride, polyethylene glycol monomethyl ether 2000 and epoxy resin; m-phenylenediamine and 2-amino-4-cyanopyridine are adopted as the curing agent; n-methylimidazole is adopted as the accelerant; the asphalt mixture prepared by the invention has good rut resistance, crack resistance and water stability.

The utility model belongs to the technical field of chemical solvent preparation, and particularly relates to a tetrahydrofuran purification device. The utility model provides a tetrahydrofuran purification device. The tetrahydrofuran purification device comprises a feed port, a catalytic hydrogenation reaction part, a gas phase discharge port, a liquid phase discharge port, a heavy component removal tower and an absorption tower. In the application, through the catalytic hydrogenation part, the impurity dihydrofuran in the tetrahydrofuran is hydrogenated to generate the tetrahydrofuran, the impurities n-butyraldehyde and isobutyraldehyde are hydrogenated to generate alcohols which are easily separated from the tetrahydrofuran, through determination, the content of the impurity dihydrofuran in the purified tetrahydrofuran is reduced to 3 ppm or below, the alcohols are separated in the heavy component removal tower, and the content of the tetrahydrofuran in the tetrahydrofuran is reduced to 3 ppm or below. The purity and the quality of tetrahydrofuran are effectively improved, and the purification device structure and the purification process are simple.

The invention discloses an anti-ultraviolet heat-insulating radiation-proof water-based glass paint and a preparation process thereof. The anti-ultraviolet heat-insulating radiation-proof water-based glass paint is prepared from the following raw materials in parts by weight: 30-50 parts of acrylic resin, 5-10 parts of a coalescing agent, 3-8 parts of butyraldehyde, 10-20 parts of nano titanium dioxide, 8-15 parts of nano tin antimony oxide, 2-5 parts of a polyacrylate dispersant, 2-5 parts of a polyurethane thickener and 15-30 parts of deionized water. Comprising the following steps: S1, weighing deionized water, a polyacrylate dispersing agent and a polyurethane thickening agent according to a ratio, and adding into a stirring kettle; and stirring at the rotating speed of 400rpm for 8 minutes. Through the synergistic effect of the nano titanium dioxide and the nano tin antimony oxide, the anti-ultraviolet, heat-insulating and anti-radiation functions are achieved at the same time, and the problem that an existing glass paint is single in function is solved; the polyacrylate dispersing agent is adopted, so that the dispersity of the nano functional filler is effectively improved, the agglomeration phenomenon is avoided, and the uniformity of the paint film performance is ensured.

The invention relates to the technical field of coatings, in particular to a preparation method of an efficient anti-corrosion material for a flexible support. The component A is prepared from the following materials in parts by weight: 30 to 50 parts of organic silicon epoxy resin, 10 to 20 parts of bisphenol A epoxy resin, 5 to 15 parts of polyvinyl butyral, 5 to 15 parts of zinc phosphate, 5 to 20 parts of hollow ceramic powder, 20 to 30 parts of mixed solvent, 5 to 10 parts of modified powder, 3 to 5 parts of additive, 1 to 3 parts of wetting agent and 0.5 to 1.5 parts of flatting agent. According to the invention, a composite structure is formed by tubular halloysite and rectorite in the modified powder, and a flexible chain segment formed by reaction of a polyurea prepolymer and esterified xylitol in the additive endows the coating with excellent elasticity, so that stress generated by dynamic deformation can be uniformly dispersed, microcrack growth is inhibited, and the wear resistance of the coating is improved. And the anti-corrosion material can keep the structural integrity when bearing the dynamic deformation of the flexible bracket, so that the flexibility of the material is improved.

This invention relates to the field of polymer material synthesis technology, specifically to a modified PVB resin and its preparation method. The invention introduces a fluorinated acetal monoaldehyde derivative containing fluorine into the PVB resin. This derivative is mixed with n-butyraldehyde and glyoxal, thereby undergoing an acetalization reaction with the 1,3-o-diol structure of the PVB molecular chain, incorporating the fluorinated side link into the PVB molecular chain. Utilizing the high electronegativity and high C-F bond energy of fluorine atoms, it shields against the intrusion of external corrosive media, inhibits oxidative yellowing, and improves weather resistance. Furthermore, the invention introduces glyoxal as a crosslinking agent, containing dialdehyde groups, which can react between adjacent polyvinyl alcohol segments, causing slight crosslinking between the originally linear PVB resin segments, improving the resin's shielding performance, further reducing the intrusion of external corrosive media, and enhancing the stability of the PVB resin.

The invention belongs to the technical field of organic synthesis, and relates to a preparation method of bis (trimethylolpropane), which comprises the following steps: preparing 2, 2-bis (hydroxymethyl) butyraldehyde from trimethylolpropane under the action of an oxidant; then, trimethylolpropane and 2, 2-bis (hydroxymethyl) butyraldehyde are subjected to reductive etherification under the action of a reductive etherifying agent and a catalyst, and the target product bis (trihydroxymethyl) propane is obtained. The preparation method of bis (trihydroxymethyl) propane has the advantages of few reaction steps and mild conditions, can improve the reaction yield, and is beneficial to the realization of industrial application.

The invention discloses a Pd supported catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The Pd supported catalyst is prepared according to the following steps: dissolving TEOS and MSDS in absolute ethyl alcohol, stirring, adjusting the pH value, aging at room temperature, and drying to obtain a mixture; and extruding the mixture into a long strip shape, calcining to prepare a TiO2-SiO2 composite carrier, dipping the TiO2-SiO2 composite carrier in a palladium nanoparticle solution, filtering, washing, and drying in vacuum to obtain the catalyst. The preparation method is simple and green in process, the reaction process is safe and easy to control, the prepared Pd supported catalyst is good in crystallization, high-dispersion nano-particle morphology, uniform in size and uniform in dispersion, and when the Pd supported catalyst is applied to co-production of methyl isobutyl ketone and methyl isoamyl ketone from mixed aldehyde and ketone, the isobutyraldehyde conversion rate can be effectively increased, and the yield of methyl isobutyl ketone and methyl isoamyl ketone can be effectively increased. The selectivity on methyl isoamyl ketone is good, and organic impurities in the product are few.

This application discloses an acetaldehyde recovery device and method in the production of 1,3-butanediol, belonging to the field of fine chemicals. The device includes: a feed pump, a preheater, a distillation column, a falling film reboiler, a bottom circulating pump, a bottom cooler, a top primary condenser, a reflux ratio distributor, a top secondary condenser, a top product tank, a top transfer tank, a bottom product tank, a bottom transfer tank, a vacuum condenser, a vacuum pump inlet separator, a high vacuum unit, and a vacuum pump outlet separator. The horizontal condenser is directly installed at the top of the distillation column, giving it advantages such as simple structure, convenient operation, low pipeline loss, and high vacuum. A method for acetaldehyde recovery in the production of 1,3-butanediol using this device is also disclosed. Compared to existing technologies, this invention uses falling film evaporation combined with vacuum deep cooling, which avoids the thermal decomposition of 3-hydroxybutyraldehyde and achieves low-temperature, high-efficiency acetaldehyde recovery. It is suitable for continuous production.

The present application relates to the technical field of alcohol aldehyde condensation reaction, and discloses an alcohol aldehyde condensation reaction method.The alcohol aldehyde condensation reaction method is carried out in an alcohol aldehyde condensation reaction device, the alcohol aldehyde condensation reaction device comprises a micro-channel alcohol aldehyde condensation reactor and an alcohol aldehyde condensation tube reactor which are connected in series; in the presence of an alkali catalyst, a reaction raw material n-butyl aldehyde is subjected to a first alcohol aldehyde condensation reaction in the micro-channel alcohol aldehyde condensation reactor to obtain a first alcohol aldehyde condensation reaction product; and the first alcohol aldehyde condensation reaction product is subjected to a second alcohol aldehyde condensation reaction in the alcohol aldehyde condensation tube reactor.The method uses a micro-channel alcohol aldehyde condensation reactor and an alcohol aldehyde condensation tube reactor to replace a full-mixing kettle reactor in the prior art to carry out alcohol aldehyde condensation reaction, so that the yield of a by-product heavy carbon alcohol can be significantly reduced, and the yield of a target product can be improved.

The invention discloses a bending-resistant high-modulus cover film and a preparation method thereof, and particularly relates to the technical field of cover films, the bending-resistant high-modulus cover film comprises an adhesive film and release paper, the adhesive film comprises a film base material and an adhesive-containing bonding layer arranged on the lower surface of the film base material; the release paper is pressed on the bonding layer; wherein the adhesive is prepared from the following components in percentage by mass: 5 to 20 percent of bisphenol A type epoxy resin, 30 to 50 percent of polyvinyl butyral resin, 10 to 20 percent of organic silicon modified epoxy resin, 6 to 10 percent of modified nano silicon dioxide, 10 to 30 percent of flame retardant and 3.1 to 6.5 percent of additive. The covering film has higher glass transition temperature (Tg) and high bending resistance, can maintain the stability of the material, and reduces the plastic deformation caused by repeated bending; the invention also provides a preparation method of the high-modulus cover film.

The invention discloses an Escherichia coli recombinant strain for producing 5-aminovaleric acid and application of the Escherichia coli recombinant strain. The invention relates to the technical field of biology, in particular to engineering bacteria for producing 5-aminovaleric acid and a preparation method of the 5-aminovaleric acid. Compared with a starting strain escherichia coli BL21, the recombinant escherichia coli has the expression of a gene sequence gamma-aminobutyraldehyde dehydrogenase abD gene, a lysine decarboxylase cadA gene and a butanediamine oxidase puO * gene; a gabT gene, a gabD gene, a gabP gene and a cadB gene on a genome of the escherichia coli BL21 are knocked out; a potE gene and a katE gene are integrated on a genome of the escherichia coli BL21. After the strain is used, the yield of 5-aminovaleric acid and derivatives can reach up to 50-192 g / L. The recombinant bacterium can be used for providing raw materials with lower cost for industries such as textiles, electronics, bioplastics, medicines and the like.

The present application relates to the technical field of electrochromic, and more particularly to a high-hydroxyl polyvinyl acetal flame-retardant interlayer for electrochromic soundproof glass, and a preparation method thereof.The preparation process comprises the following steps: adding polyvinyl butyral with low acetalization degree into N,N-dimethylformamide, heating and stirring to dissolve, then adding plasticizer and electrolyte salt in sequence, heating and stirring to dissolve, pouring into a mold, vacuumizing to remove bubbles, and heating to remove solvent, thereby obtaining the flame-retardant interlayer.The present application solves the problems of liquid leakage, easy volatilization and safety hazards of the existing liquid reversible metal electrodeposition electrochromic device.

[Problem] To provide a means capable of more efficiently exerting an antibacterial effect against bacteria. [Solution] An antibacterial agent containing at least two compounds selected from the group consisting of trans-2-methyl-2-pentenal, 2-methylbutanal, trans-2-hexenal, propionaldehyde, 3-methylpentanol, and 2,5-dimethylfuran.

This invention belongs to the field of homogeneous catalysis technology, and particularly relates to a method for the hydroformylation of propylene to prepare isobutyraldehyde. The method includes: in the presence of a bidentate P-N ligand and a rhodium metal compound, introducing propylene and syngas to carry out a hydroformylation reaction to prepare isobutyraldehyde. The structural formula of the bidentate P-N ligand is as follows: [Insert structural formula here]. Wherein, R1 is selected from one of C2-C4 alkyl groups, substituted or unsubstituted phenyl groups; R2 is selected from one of hydrogen, C1-C4 alkyl groups, alkoxy groups, substituted or unsubstituted phenyl groups. This method provides a highly active P-N ligand, which, while reducing the amount of rhodium catalyst, maintains high activity and can significantly improve the conversion rate of propylene, as well as the selectivity and yield of isobutyraldehyde.

The invention relates to the technical field of polyvinyl butyral modified materials, and discloses a modified PVB (polyvinyl butyral) material based on nano-silica and a preparation method thereof, the modified PVB material is prepared from the following raw materials by weight: 100 parts of polyvinyl butyral resin; 25 to 45 parts of triethylene glycol di-2-ethylhexoate; 0.5 to 5.0 parts of nano silicon dioxide; 0.05 to 0.50 part of a titanate coupling agent; 0.02 to 0.15 part of magnesium stearate; and 1.0 to 5.0 parts of epoxidized soybean oil. The method comprises the following steps: dispersing silicon dioxide by a plasticizer, dehydrating, adding a coupling agent for in-situ grafting, and compounding a stabilizer to prepare mother liquor; infiltrating the mother liquor into the resin to obtain a swelling material; and performing temperature-controlled extrusion. The modified PVB material based on nano silicon dioxide prepared by the invention solves the problems of particle agglomeration and yellowing, and has high transparency, high strength and excellent heat aging resistance.

The utility model relates to the technical field of chemical engineering devices, in particular to an n-butyraldehyde condensation reactor. The reaction kettle is provided with the micro-interface reaction area, so that the mixing degree of raw materials can be effectively improved. The micro-interface reaction area comprises two micro-interface reactors and a transition area, so that the contact area between reactants can be maximized, the reaction rate is accelerated, and the reaction efficiency is improved. Besides, the micro-interface reactor adopts two-stage arrangement and comprises a first-stage mixing section and a second-stage mixing section, so that the mixing is more sufficient, and the reaction efficiency is further improved. According to the utility model, the addition amount of alkali liquor is accurately controlled in a mode of adding the alkali liquor step by step. The number of the alkali liquor adding pipelines is three, and each pipeline is provided with an independently controlled flow valve. An operator can accurately adjust the flow of the alkali liquor according to the reaction requirement, so that the influence on the yield and the quality of a product due to overhigh concentration of the alkali liquor is avoided.

The application relates to the technical field of solar cells, in particular to a two-component organic carrier and a preparation method and application thereof, the organic carrier comprises A component and B component, preparation raw materials of the A component comprise a first resin base, a first solvent, a first thixotropic agent and a first auxiliary agent; preparation raw materials of the B component comprise a second resin base, a second solvent, a second thixotropic agent and a second auxiliary agent; preparation raw materials of the first resin base comprise polyvinyl butyral resin and first cellulose; and preparation raw materials of the second resin base comprise polyvinyl butyral resin and second cellulose. The prepared organic carrier is tested, the single consumption range of the organic carrier can be controlled within 20%, with the decrease of the single consumption, the machine welding tension and the aging tension are both stabilized above 3N, and the requirements of the reliability of the tension of the crystalline silicon solar cell piece can be met.