92results about How to "Guaranteed reaction rate" patented technology

The invention discloses a selective hydrogenation catalyst and a preparation method and application thereof. The catalyst comprises the following components: palladium is used as an active ingredient without the addition of a second component; calcium carbonate or barium sulfate is used as a carrier; and the palladium content of the catalyst is 0.5 to 1.5 weight percent. The selective hydrogenation catalyst prepared according to the provided method has high activity and good selectivity. When the catalyst is applied to 1,4-butynediol reduction reaction, the conversion rate of 1,4-butynediol can reach over 99.8 percent; and the selectivity of the 1,4-butynediol is over 98 percent.

The invention provides a catalyst for use in synthesis of dioctyl terephthalate and a method for preparing dioctyl terephthalate by applying the catalyst. The catalyst consists of a catalyst 1 and a catalyst 2, wherein the catalyst 1 consists of an ionic liquid and a metal compound; the catalyst 2 consists of a titanium metal compound and other metal compound; the positive ion of the ionic liquid are an imidazole ion or a benzimidazole ion; the negative ion of the ionic liquid is a bisulfate ion; or the positive ion of the ionic liquid is a benzimidazole ion or an imidazole ion with one or two sulfonic acid radicals; the titanium metal compound is selected from at least one compound of tetrabutyl titanate, isopentyl ester titanate, isopropyl titanate or titanium dioxide; and the other compound is selected from at least one compound of dibutyldimethoxytin, dibutyltin oxide, monooctyl ester stannite, zinc acetate and cobalt acetate. Due to the adoption of the technical scheme provided by the invention, the cost can be reduced, the reaction speed is increased, energy consumption is lowered, and the quality of an obtained product is high.

The invention discloses a highly dispersed palladium / carbon nanometer tube catalyst for anthraquinone hydrogenation and a preparation method thereof, and relates to a catalyst and a preparation method. According to the invention, a carbon nanometer tube industrial product with good conductivity, heat conductivity, high mechanical strength and huge external specific surface is used as a palladium carrier; simultaneously ultrasonic is utilized to further enhance the dispersity and uniformity of palladium and the carbon nanometer tube; and a nanometer palladium catalyst uniformly loaded on the surface of the carbon nanometer tube is prepared in a slurry reactor by adopting a liquid phase reduction method. The catalyst needs no extrusion molding and can be directly suspended in the liquid phase for normal-pressure or pressurized hydrogenation of anthraquinone; the activity of the catalyst is not reduced after the catalyst is used for a plurality of times by filtration and separation; moisture, acid and alkaline do not influence the use effect; the catalytic activity of the new catalyst is 4-8 times higher than that of the traditional Pd / gamma-Al2O3 catalyst, and the amount of the catalyst used can be greatly reduced. The catalyst can be used for replacing the traditional catalyst, the post treatment of the traditional catalyst is simplified, the treatment capability of a device is greatly increased, and the operation cost is lowered.

The invention discloses an enzymic method for simultaneously preparing glutathione and adenylate. The enzymic method comprises the following steps: (1) generating glutathione and adenylate from GshF enzyme and Adk enzyme in a reaction tank; (2) separating the immobilized GshF enzyme and Adk enzyme in the reaction tank, or separating the free GshF enzyme and Adk enzyme by virtue of filtering equipment; and (3) separating products GSH and AMP. By virtue of the preparation method, the reaction condition in production of the GSH is optimized, the generation concentration of GSH reaches 30g / L-50g / L, and the utilization rate of amino acid is relatively high; meanwhile, by carrying out partial regeneration on ATP consumed in reaction by virtue of the Adk enzyme, the consumption of the ATP is reduced; and furthermore, the GSH and the AMP can be simultaneously prepared by virtue of the preparation method.

The invention relates to a method for preparing polyimide fiber by combining a three-step method and imidization. The method comprises the following steps: a dianhydride monomer and a diamines monomer are subjected to a condensation polymerization reaction in a reaction solvent to obtain a polyamide acid spinning solution; according to a wet spinning technology, the spinning solution is extruded through a spinning head and is subjected to coagulation bath, washing, and drying to obtain the polyamide acid fiber; then primary heat treatment is carried out to obtain partially imidized fiber; fiber is infiltrated in an acetic anhydride / pyridine solution for chemical imidization; and finally, steps of drying and further thermal cyclization are carried out to obtain the polyimide fiber. According to the invention, the chemical imidization process is added in a traditional thermal imidization process, imidization degree of the fiber is increased, at the same time, a ring-closure reaction in a tubular furnace is reduced by the chemical imidization, draw ratio is increased, fiber orientation degree is increased, so that the mechanical properties of the polyimide fiber are greatly increased.

The invention relates to a reaction system and process for preparing butyl octanol through propylene carbonylation based on micro-interface enhancement. The reaction system comprises a carbonyl synthesis unit, a butyraldehyde treatment unit, a butyraldehyde condensation unit, a hydrogenation reaction unit, a purification unit and a micro-interface generator. According to the invention, propylene and synthesis gas are treated by additionally arranging a micro-interface generator, and are crushed to form micron-scale bubbles, and the micron-scale bubbles and a rhodium catalyst triphenylphosphinesolution are mixed to form a gas-liquid emulsion to increase the phase interface area of a gas phase and a liquid phase and achieve the effect of enhancing mass transfer within a lower preset operation condition range, so that the carbonyl synthesis efficiency of propylene and synthesis gas is improved, the propylene reaction efficiency and utilization rate are improved, the propylene utilizationrate is increased, the production cost of butyl octanol is reduced, and the requirements of existing circular economy are met.

A waste battery piece recycling process includes the following steps that an aluminum layer is removed, a silver layer is removed, silver powder is recycled, a silicon nitride layer is removed, and a pure silicon wafer is recycled. The waste battery piece recycling process is provided in the invention, alkali liquor and a hydrofluoric acid solution which are used are both discarded liquor discharged by a solar battery production line, further use is conducted, the production cost is reduced, and meanwhile the optimal temperature of the reaction in each step is regulated and controlled. Utilization of energy can also be considered on the premise of ensuring efficiency, the recycled silver powder and the recycled silicon wafer have very high economic value, the recycling rate of silicon of the recycled silicon wafer reaches 99% or above, and the recycling rate of silver can also reach 95% or above. These materials can be used for manufacturing silicon wafer batteries again, the production cost is reduced, environment friendliness is achieved, pollution is little, and the waste battery piece recycling process has very high popularization value.

The invention relates to a preparation method and a preparation system of trimanganese tetraoxide. The preparation method comprises: introducing micro-nano gas bubbles into a reaction liquid mixture containing a manganese source to obtain a liquid-gas mixture containing the micro-nano gas bubbles and the reaction liquid mixture, and carrying out a reaction to obtain trimanganese tetraoxide, wherein the micro-nano gas bubbles contain oxidizing gas, and the average valence of the manganese in the manganese source is less than 8 / 3. According to the present invention, by introducing the micro-nanogas bubbles containing the oxidizing gas into the reaction system containing the manganese source, the oxidation reaction rate is improved, and the oxidation reaction time is shortened; and the generation rate of the trimanganese tetraoxide is increased, the particle size of the trimanganese tetraoxide is reduced, the develop integrity of the trimanganese tetraoxide crystal is improved, and the defect of the crystal is reduced.

The invention belongs to the field of material preparation, and discloses a photoanode material based on a covalent organic framework as well as a preparation method and application of the photoanode material. The material comprises a cocatalyst, and thecovalent organic framework based on a triazine structure; the cocatalyst and the covalent organic framework based on the triazine structure are stacked layer by layer to form a two-dimensional layered structure, and preferably, the cocatalyst is MoS2. The covalent organic framework material based on the triazine structure has high crystallinity, high specific surface area and good chemical stability, can serve as an excellent heterogeneous photocatalyst due to the fact that the content of the N component is rich and the visible light absorption property is high; and in addition, the covalent organic framework material is combined with the cocatalyst, the cocatalyst and the covalent organic framework (TTZ-COF) based on the triazine structure are stacked layer by layer to form the two-dimensional layered structure; and the two-dimensional layered structure is used as the photoanode material, so that the light utilization rate of the photoanode material can be effectively improved, and the efficiency of photolysis of water is ensured.

The invention relates to an intelligent control reaction system and process for preparing butyl octanol through carbonylation of propylene. The intelligent control reaction system comprises an OXO unit, a butyraldehyde treatment unit, a butyraldehyde condensation unit, a hydrogenation reaction unit, a purification unit, a micro-interface generator and an intelligent control unit. According to theinvention, propylene and synthesis gas are treated by additionally arranging the micro-interface generator, the propylene and the synthesis gas are crushed to form micron-scale bubbles, and the micron-scale bubbles and a triphenylphosphine solution of a rhodium catalyst are mixed to form a gas-liquid emulsion, so the phase interface area of a gas phase and a liquid phase is increased, the OXO efficiency of the propylene and the synthesis gas is improved, the utilization rate of propylene is improved, and the production cost of butanol and octanol is reduced; and through the intelligent controlunit, a worker can know the real-time condition of each data returned by intelligent sensing modules at any time through mobile equipment, and can realize accurate control on the inner temperature and inner pressure of the whole reactor by changing preset values, so reaction efficiency is further improved.

The invention discloses a preparation method of N,P-codoped three-dimensional Co nanoflower, an obtained material and application of the material as oxygen to separate out an anode catalyst by electrolysis of water. The method comprises the step of carrying out reduction by taking alkaline metal inorganic salt as a template, taking inorganic cobalt salt as a cobalt source and taking hypophosphiteas a phosphorus source to obtain a N,P-codoped three-dimensional Co nanoflower catalyst. The N,P-codoped three-dimensional Co nanoflower prepared by the method has the advantages of ordered morphology, large surface area, high electrocatalytic activity and the like, is taken as the oxygen to separate out the anode catalyst, and has high catalytic activity and stability. The preparation method is simple and effective, and is universal.

The invention discloses a multifunctional reaction kettle for chemical production. The multifunctional reaction kettle comprises a bottom box, wherein one side of the bottom of the inner wall of the bottom box is fixedly connected with a first motor; an output shaft of the first motor is fixedly connected with a stirring device through a speed reducer; the top of the inner wall of the bottom box is fixedly connected with a second motor; an output shaft end of the second motor is fixedly connected with a gear; the surface of the gear is meshed with a slag removal device; one side of the top ofthe kettle body is communicated with a feed pipe; the top of the kettle body is fixedly connected with a gas treatment box through a support frame; one side of the inner wall of the kettle body is fixedly connected with a liquid level sensor; the bottom of the inner wall of the kettle body is fixedly connected with a temperature sensor; a heating pipe is fixedly connected in the wall body of the kettle body. The invention relates to the field of chemical technology. The multifunctional reaction kettle for chemical production solves the problems of waste gas treatment, is harmless to environment and humankind, has high automation degree and ensures stable product quality.

The invention provides a method of producing hydrogen energy through physical ball milling of metal powder. The method comprises: putting metal powder into a vacuum ball mill, adding a small amount ofa metal chloride aqueous solution and an aid into the powder and carrying out wet ball milling in a hydrogen protective atmosphere so that the oxide layers or hydroxide formed by the reaction is peeled from the metal powder under the action of ball milling. Through use of the aid in the metal powder-based hydrogen production and physical ball milling, the oxide / hydroxide film formed in the hydrolysis hydrogen production reaction is peeled from the metal powder so that the hydrogen production yield and the reaction rate are effectively ensured. The whole process is simple, the reaction processis neutral, the equipment requirements are low and the production cost is low.

The invention discloses a harmless treatment method and a harmless treatment system for metal lithium waste residue. The method comprises: providing a liquid phase system, wherein the liquid phase system comprises an oil phase and an aqueous phase, the oil phase and the aqueous phase are layered, and the oil phase is distributed above the aqueous phase, and does not react with metal lithium wasteresidue; adding the metal lithium waste residue to the liquid phase system, and distributing metal lithium waste residue in the oil phase; and pressing the metal lithium waste residue into the aqueousphase, and making the metal lithium react with water while continuously removing the hydrogen generated by the reaction so as to achieve the harmless treatment of the metal lithium waste residue. According to the present invention, the whole reaction of the harmless treatment method is performed on the bottom of the water, such that oxygen can be isolated, the reaction rate of metal lithium and water can be ensured, the treatment efficiency can be improved, and the demands of industrial production can be ensured; and the method is safe and controllable, and cannot cause lithium residue firingand explosion.

The invention provides a ligand-free atom transfer radical polymerization method under the effect of metal elementary substances. Organic ligands are omitted in the ligand-free atom transfer radical polymerization method. Polymerization systems comprise vinyl monomers, halogenated hydrocarbon, the metal elementary substances and transition metal catalysts. The ligand-free atom transfer radical polymerization method has the advantages that atom transfer radical polymerization reaction can be carried out on the monomers under halogenated hydrocarbon activation effects of the metal elementary substances, and accordingly polymers with narrow molecular weight distribution can be generated; the halogenated hydrocarbon is activated by the aid of the metal elementary substances, accordingly, the reaction activity of the polymerization systems can be improved, polymerization after-treatment procedures can be simplified, and the cost can be reduced; the organic ligands are omitted in the ligand-free atom transfer radical polymerization method, and accordingly the shortcomings of high cost and toxicity, volatility and the like due to organic compounds or polar solvents which are used as ligands in existing atom transfer radical polymerization systems can be overcome.

The invention relates to a system and process for preparing hydrogen peroxide based on an anthraquinone method. The system comprises a hydrogenation tower, a micro-interface generator, a filtering andcooling unit, an oxidation tower and an extraction tower. Hydrogen is crushed to form micron-sized bubbles, and the micron-sized bubbles are mixed with an anthraquinone derivative-containing workingsolution or a 2-ethylanthraquinone-containing hydrogenated solution to form a gas-liquid emulsion, so that the phase interface area of a gas phase and a liquid phase is increased, the effect of enhancing mass transfer within a relatively low preset operation condition range is achieved, the hydrogenation and oxidation efficiency of the anthraquinone derivative-containing working solution is improved, the hydrogen reaction rate is improved, the cost is saved, and the risk is reduced. A mixture of 2-ethylanthraquinone and hydrogen peroxide is extracted through the extraction tower, countercurrent extraction is carried out on a water phase from top to bottom and the mixture from bottom to top, and rapid extraction is realized.

The invention provides a water absorbing resin capable of reducing acrylic acid residues and a preparation method of the water absorbing resin. The preparation method is characterized by comprising the following steps: neutralizing an aqueous solution of acrylic acid by using liquid caustic soda, and sequentially adding a polymerization monomer, a cross-linking agent, a photoinitiator and an initiator; placing the mixed solution into a water bath or blowing cold air to the mixed solution; carrying out a polymerization reaction on the mixed solution under an ultraviolet lamp to obtain a transparent colloid; and pelleting the colloid, and performing drying and crushing to obtain a product. The preparation method does not need introducing nitrogen to remove oxygen, so that the preparation method is simple in operation; the polymerization efficiency is increased by the interaction among the initiators; the water bath or the cold air can bring away heat generated by polymerization in time so as to enhance the polymerization and cross-linking degrees; and compared with single ultraviolet polymerization and thermal-initiated polymerization, the preparation method is better in cross-linking degree, shorter in polymerization period, free of acrylic acid gas in the polymerization process, more friendly to environment, strong in controllability and low in acrylic acid residues.

The invention discloses an integrated dry type purification method and system of flue gas multi-component pollutants. The integrated dry type purification method of the flue gas multi-component pollutants comprises the following steps: S10: adding an alkali absorbent into flue gas; removing pollution components including acidic gas, dioxin, gas-state metal and the like in the flue gas by the alkali absorbent, thus obtaining first flue gas; S20: adding a reducing agent into the first flue gas to obtain second flue gas; S30: enabling the second glue gas to pass through an SCR-FI catalysis filtering assembly, wherein smoke dust and the alkaline particle absorbent are intercepted on the surface of the SCR-FI catalysis filtering assembly, and the reducing agent and nitrogen oxide have a denitration reaction in the SCR-FI catalysis filtering assembly to generate nitrogen gas and water; S40: discharging clean flue gas. The integrated dry type purification method of the flue gas multi-component pollutants, disclosed by the invention is short in flow and simple in process, and can be used for effectively removing the pollution components including the smoke dust, the dioxin, the multi-component acidic gas, the nitrogen oxide and the like in the flue gas; no wastewater is generated, the investment cost is low, and the purification efficiency is high.

The invention provides an iodomethane preparation method and an acetic acid production method. The acetic acid production method comprises the following steps: under a carbonylation reaction condition, transporting methanol and CO into a reactor to contact the methanol and CO in the reactor in the presence of a main catalyst, an iodomethane co-catalyst, an organic solvent, methyl acetate, and water; transporting the mixture of the methanol and CO after the contacting to a flash evaporation tower to carry out flash evaporation, and transporting the acetic acid-containing gas phase component obtained in the flash evaporation to a light component rectifying tower to carry out rectification. The method also comprises steps of detecting the iodomethane content in the reactor and judging whether the iodomethane content meets the carbonylation reaction requirements or not; when the iodomethane is insufficient, methanol and hydrogen iodide are fed into the light component rectifying tower so as to generate iodomethane in the light component rectifying tower during the rectification process; the generated iodomethane can be taken as one part of the light component, then the iodomethane is separated and returned to the reactor, and the organic solvent is organic carboxylic acids with a carbon number of 2 to 5. The method can maintain the carbonylation reaction speed, and avoids the iodomethane leakage hazard during the transportation process.

The invention discloses a chemical raw material processing reaction device comprising a casing. The left side of the top of the casing is fixedly connected with a motor seat, a motor is fixedly connected with the upper part of the motor seat, a driving bevel gear is fixedly connected with the output end of the motor, and the top of the casing is rotatably connected with a stirring shaft. The top of the stirring shaft is fixedly connected with a driven bevel gear, and the driven bevel gear meshes with the driving bevel gear. A horizontal rotating rod is fixedly connected with the upper part ofthe stirring shaft. A plurality of longitudinal stirring rods are vertically connected fixedly with the lower part of the horizontal rotating rod, and an overflow plate is slidably connected with theinside of the casing. The overflow plate is provided with a plurality of guiding holes. The longitudinal stirring rods are slidably connected with the guiding holes, and the outer sides of the longitudinal stirring rods are sleeved with springs. Compared with the prior art, the chemical raw material processing reaction device has the advantages of simple structure and convenient use, and can effectively and fully mix reaction raw materials in the chemical production, thereby ensuring the reaction rate and accelerating the reaction process.

The invention discloses a method for extracting valuable metals from low-nickel matte converter slag. According to the method for extracting the valuable metals from the low-nickel matte converter slag, the low-nickel matte converter slag is mixed with quicklime and roasted to obtain a roasted material, the roasted material is ground and magnetically separated to obtain silicate and iron-rich slag, a strong alkali solution is added into the iron-rich slag for soaking treatment, solid-liquid separation is carried out to obtain filtrate and filter residues, the filter residues are mixed with acid liquor, oxygen pressure acid leaching is carried out, solid-liquid separation is carried out to obtain leachate and iron oxide red, hydrogen sulfide gas is introduced into the leachate, the pH value is adjusted, and solid-liquid separation is carried out to obtain copper sulfide precipitate and nickel-cobalt-containing filtrate. According to the method for extracting the valuable metals from the low-nickel matte converter slag, silicon dioxide is removed through roasting to prepare silicate, then iron oxide red is prepared through acid leaching, and finally the leachate is subjected to metal separation, so that various components in the converter slag are fully utilized; and the technological process is short, each component of the low-nickel matte converter slag is effectively utilized, waste is turned into wealth, and loss of valuable metal elements is reduced.

The invention provides a reaction system and process for synthesizing dimethyl carbonate through liquid-phase oxidative carbonylation of methanol. The system comprises: a feeding unit used for storingand conveying mixed gas of carbon monoxide and oxygen and a methanol liquid; a reaction kettle internally provided with a micro-interface generator, connected with the feeding unit and used as a place for oxidative carbonylation reaction; a gas-liquid separation unit connected with the reaction kettle and used for carrying out gas-liquid separation on the oxidative carbonylation reaction product;and a rectifying tower connected with the gas-liquid separation unit and used for rectifying the crude product dimethyl carbonate obtained by gas-liquid separation. According to the reaction system and process for synthesizing dimethyl carbonate through liquid-phase oxidative carbonylation of methanol, the problem that in the prior art, the yield of dimethyl carbonate is reduced due to the fact that methanol and mixed gas of carbon monoxide and oxygen cannot be fully mixed in an oxidative carbonylation reaction kettle is solved.

The invention provides a method for polymerizing reverse atom transfer radicals under activation action of alkali on halohydrocarbon. According to the polymerization method, no organic ligand or radical initiator is used, a polymerization system comprises vinyl monomers, halohydrocarbon, alkali and a high-valence transition metal catalyst, and monomers are subjected to a reverse atom transfer radical polymerization reaction under the activation action of alkali on halohydrocarbon to produce a polymer with narrow molecular weight distribution. With the adoption of the polymerization method, no radical initiator or a low-valence transition metal catalyst sensitive to water and oxygen is used, and meanwhile, the defects of high price and environmental pollution due to the fact that toxic and volatile organic compounds are used as ligands in existing atom transfer radical polymerization methods are overcome.

The invention discloses a wet etching method of a Mn-Co-Ni-O thermosensitive thin film, which comprises the following steps of firstly performing positive resist lithography using positive photoresist to obtain a required pattern, protecting a required mesa graph by photoresist, secondly subjecting samples to etching by means of an onsite prepared reducibility etching liquid, estimating the required time of etching according to the thickness of sample-cuttings, cleaning with acetone and alcohol after completing etching, and blow-drying the sample-cuttings with dry nitrogen. According to the wet etching method of the Mn-Co-Ni-O thermosensitive thin film, wet etching of Mn-Co-Ni-O thermosensitive materials is achieved. Further, the etching rate is improved by appropriately increasing the temperature and adding an appropriate quantity of hydrochloric acids within tolerance range of the photoresist. Compared with dry etching, the wet etching has the advantages that the efficiency is greatly improved, thermistor edges are orderly, lateral etching ratio is small, and pattern quality is high.

The invention relates to the technical field of daily chemical products and in particular to a clean effervescent tablet with pesticide residue and bacteria removing effects and a preparation method of the clean effervescent tablet. According to the preparation method disclosed by the invention, a specific surfactant is combined with a special wet granulation process, so that the feasibility of the production process is ensured. The clean effervescent tablet has the advantages that no dryness or stickness is caused; the adhesion of foam to the surface of a disintegrating agent can be inhibited, the disintegration speed is increased and an effervescent effect is quickly exerted; in the disintegration and dispersion process, the efficient alkaline supplementing effect on a solution system is realized by synergizing a bacteria remover with an alkali-source supplement, fruit wax and pesticide left on vegetables and fruits can be effectively removed, and the aims of effectively removing escherichia coli and staphylococcus aureus are achieved. By using the alkali-source supplement with a special structural form, metal ions in the water body and on the surface of the vegetables and the fruits can be effectively chelated, the effects of softening the water body and chelating the metal ions are realized, and the deposition of calcium scales on the surfaces of cleaned materials is prevented; in addition, a variety of calcium scales or stains are dispersed, so that secondary pollution to tableware, the fruits and the vegetables caused by deposition is prevented.

The invention provides an N-(2-hydroxyethyl)diethylenetriamine Schiff base catalyst, a preparation method thereof, and an application of the catalyst in the preparation of beta-isophorone. The preparation method of the catalyst comprises the following steps: 1) reacting diethylenetriamine with aromatic aldehyde to prepare a bis-Schiff base; and 2) reacting the bis-Schiff base compound with ethylene oxide to obtain the N-(2-hydroxyethyl)diethylenetriamine Schiff base. The invention also provides a method for preparing beta-isophorone from alpha-isophorone through an isomerization reaction underthe action of the Schiff base. The catalyst is simple to prepare and easy to industrialize. The prepared N-(2-hydroxyethyl)diethylenetriamine Schiff base has the advantages of high selectivity and high yield for the reaction of isomerizing alpha-isophorone to generate beta-isophorone, low generation possibility of byproducts, easiness in industrial production, and no corrosion to equipment.

The invention relates to a system and process for preparing an alpha-olefin-fluorostyrene polymer. The system comprises a monomer storage tank, a reaction unit, a micro-interface generator, a filter,a washing unit, a drying box and a heat exchanger. According to the invention, the alpha-olefin monomer is crushed to form micron-scale bubbles, the micron-scale bubble can be fully mixed with fluorostyrene and an additive to form a gas-liquid emulsion, and the alpha-olefin and fluorostyrene in the system can be in full contact with the additive by fully mixing the gas phase and the liquid phase,so that the polymerization efficiency of the system is improved; and meanwhile, the micron-scale bubbles and the materials are mixed to form the gas-liquid emulsion, and the raw materials are fully mixed, so that the phase interface area of a gas phase and a liquid phase is increased, the thickness of a liquid film is reduced, the mass transfer resistance is reduced, and the effect of enhancing mass transfer in a lower preset operation condition range is achieved.

The invention discloses a polycarbonate synthesis process. According to the process, bisphenol A and isosorbide are each evenly mixed with dimethyl oxalate in a molten state for esterification reaction; a reaction product obtained after esterification of the bisphenol A and the dimethyl oxalate and a reaction product obtained after esterification of the isosorbide and the dimethyl oxalate are subjected to polymerization to obtain bisphenol A-isosorbide copolymer polycarbonate. In a chain segment of the bisphenol A-isosorbide copolymer polycarbonate, the bisphenol A and the isosorbide are ranked irregularly; since the isosorbide is a biomass product and the activity of secondary carbon carbonyl in the isosorbide is lower than that of phenol carbonyl in the bisphenol A, the ester group formed by the isosorbide and the dimethyl oxalate is more prone to fracture under the effects of microorganisms or degrading enzymes. However, the isosorbide is of a chiral structure, so the obtained bisphenol A-isosorbide copolymer polycarbonate can guarantee the rigidity of bisphenol A polycarbonate, is suitable for being applied to such fields as automobiles, electricity, construction and packaging, and will not cause pollution to the natural environment.

The invention relates to the field of production technical equipment, and discloses a kaolin production and preparation device and method, the kaolin production and preparation device comprises a reaction mechanism and a test mechanism, the reaction mechanism comprises a stirring tank and a stirring mechanism, the stirring mechanism comprises a first motor, the output end of the first motor is cooperatively connected with a threaded lead screw, and the threaded lead screw is connected with a second motor; a threaded lead screw is arranged in the stirring tank, a sliding block is connected to the threaded lead screw in a matched mode, a second motor is fixedly installed on the sliding block, the output end of the second motor is connected with a stirring shaft in a matched mode, the stirring shaft penetrates through a top cover of the stirring tank and extends into the stirring tank, and a plurality of sets of stirring blades are arranged on the stirring shaft in the length direction at intervals. The radial lengths of the plurality of groups of stirring blades are unequal, and the running speed of the stirring blades can be controlled according to the heat transfer rate, so that the heat transfer rate is always kept in a preset range, and the finished product quality of the final coating is ensured while the production efficiency is ensured.

The invention provides a silicon hybrid composite coating electronic adhesive and a preparation method thereof. The preparation method comprises the following steps: under the action of acid catalysts which are respectively added in multiple steps, performing catalytic reaction on ethyl orthosilicate, PDMS (polydimethylsiloxane) and methyltriethoxysilane to form sol A; and compounding the sol A and chitosan to form the novel silicon hybrid composite coating electronic adhesive. The prepared coating electronic adhesive has favorable comprehensive properties; a coated film formed by the coating electronic adhesive has excellent hydrophobicity, favorable stain resistance and corrosion resistance, high adhesive force onto a coated substrate, high refracting index, fine mechanical property and good oxygen barrier property; and the preparation method is simple in preparation technique, easy to control in technical process and low in cost.