146results about How to "Moderate reaction temperature" patented technology

The invention relates to a solar cell packaging EVA adhesive film capable of resisting heat, humidity, ultraviolet light and aging, which comprises the following materials by weight portions: 100 portions of copolymer of ethylene vinyl acetate, 0.8-1.4 portions of crosslink curing agent, 0.05-0.15 portion of crosslink curing accelerator, 0.2-0.6 portion of tackifier, 0.1-0.5 portion of antioxidant, 0.05-0.25 portion of ultraviolet light stabilizer and 0.1-0.3 portion of ultraviolet light absorbent, wherein the crosslink curing agent is tert butyl peroxy 2-ethyl hexyl carbonate; the crosslink curing accelerator is triallyl isocyanurate; the tackifier is r-glycidyl ether oxy-propylltrimethoxysilane; the antioxidant is one or two selected from the group consisting of bis(2,4-dicumylphenyl)pentaerythritol diphosphite, distearyl pentaerythritol diphosphite, tris(nonyl phenyl)phosphate and tris(2,4-butylphenyl)phosphate; and ultraviolet light absorbent is gas phase silicon dioxide. The solar cell packaging EVA adhesive film can resist high temperature of 85 DEG C, humidity of 85 percent, ultraviolet light and thermal oxidative aging.

The invention relates to a method for preparing polyol ester lubricating oil by using a composite solid acid catalyst. The method comprises the following steps of: adding a water carrying agent into polyol ester and monobasic fatty acid, performing esterification reaction under the action of the composite solid acid catalyst, and dehydrating and esterfying to obtain raw ester; performing filter pressing on the raw ester to separate the raw ester from the solid acid catalyst, wherein the catalyst can be recycled; and performing reduced pressure distillation on the raw ester to remove the residual fatty acid, and then deacidifying and decolorizing to refine with heating by using a refining adsorption bed layer respectively to obtain low-acid value polyol ester lubricating oil. The method has the advantages that the catalyst can be recycled, the esterification rate is high, an aftertreatment process is simple, and a product is low in acid value, high in purity, environment-friendly and suitable to be produced industrially. The reaction esterification rate can reach over 99 percent, and the acid value of the ester product obtained through refining can be controlled to be less than 0.01mg KOH / g. The product is excellent in visco-temperature performance, high in lubricity and thermal stability, strong in hydrolytic stability, low in volatility and excellent in electrical insulation property.

The invention discloses a cardanol-based antioxidant as well as a preparation method and application thereof. The cardanol-based antioxidant contains a compound with a structure shown as a formula (1): (shown in the description), wherein n ranges from 0 to 3; R1 and R2 are respectively and independently selected from H, alkyl, cycloalkyl, aryl, alkaryl or aralkyl; at least one of R3 and R4 has a structure shown as a formula (2) or (3): (shown in the description); R and R' are respectively and independently selected from H, alkyl, cycloalkyl, aryl, alkaryl or aralkyl; R5 is selected from -S-, -O-, -NH- or -(CH2)n'-; n' ranges from 0 to 3; Ra and Rb are respectively and independently selected from H, -OH, -SH, -NH2, alkyl, cycloalkyl, aryl, alkaryl or aralkyl; m and m' are any integer of 0 to 3 respectively. The cardanol-based antioxidant disclosed by the invention has the characteristics of greenness, environmental protection, antioxidation property, excellent thermal stability and extreme pressure resistance and the like; a preparation process has the advantages of simplicity, feasibility, mild conditions and wide application prospect in the fields of multiple oil products, fuel, plastic, rubber, fibers, coatings and the like.

The present invention relates to a process for obtaining fatty acid esters from triglycerides by means of alcoholysis. In particular, the invention relates to a process for the transesterification of fat and / or oil by alcoholysis wherein, in order to accelerate the process in the initial stage, at least one alkanol fatty acid ester is added in a quantity such that the reaction mixture produced thereby consists of one phase. A high reaction rate can thereby be maintained in the process from the beginning.

The invention provides a method for circulating a cold regenerated catalyst and application thereof. A regenerated catalyst from a regenerator is cooled by a catalyst cooler to between 200 and 720DEGC, and is not mixed with a hot regenerated catalyst to directly enter a riser reactor, or is mixed with another part of uncooled hot regenerated catalyst into a mixed regenerated catalyst of which thetemperature is not lower than that of the regenerator to enter the riser reactor; and a hydrocarbon raw material undergoes contact reaction with the catalyst in the riser reactor, the reaction material flow enters a settler for the separation of the catalyst and oil gas, the separated catalyst to be regenerated is subjected to steam stripping in a steam stripping section, and then enters the regenerator for coke burning regeneration, and the regenerated catalyst is cooled and returns to the riser reactor for recycling. The method for circulating the cold regenerated catalyst has wide application, can be used for various fluid catalytic cracking processes comprising resid fluid catalytic cracking, wax oil catalytic cracking, gasoline catalytic conversion upgrading and the like, and also can be sued for other gas-solid reaction processes comprising residual oil pretreatment, fluid coking and the like.

The invention relates to a preparation method of a silver particle with a sheet-strip integrated structural shape. The preparation method of the silver particle with the sheet-strip integrated structural shape comprises the following step of preparing the silver particle with the sheet-strip integrated structural shape by a chemical liquid-phase reduction method by taking deionized water or distilled water as a solvent, a soluble silver salt as a silver source, an organic acid and / or an organic acid salt and an inorganic acid as main shape controlling agents, a small molecular alcohol and / or ketone as a modifier, and ascorbic acid and / or ascorbate as a reductant, wherein the silver particle has an integral structure consisting of silver by sheet-shaped silver and strip-shaped silver; the width of the sheet-shaped silver is between 2-20 microns and adjustable; the thickness of the sheet-shaped silver is 100-300 nanometers and adjustable; the length of the strip-shaped silver is 5-50microns and adjustable; the width of the strip-shaped silver is 200-500 nanometers and adjustable; and the thickness of the strip-shaped silver is 100-300 nanometers and adjustable. The preparation method of the silver particle with the sheet-strip integrated structural shape is mild in preparation conditions; and prepared silver particles are high in yield and high in purity.

The invention discloses cysteine and citric acid derivative fluorescent powder and a preparation method therefor, and belongs to the field of fluorescent materials. According to the preparation method for the cysteine and citric acid derivative fluorescent powder, natural products cysteine and citric acid are adopted as raw materials, and the raw materials react in oleic acid to prepare fluorescent polymer with a high quantum yield; and the fluorescent polyme emits bright blue light under irradiation of 365nm ultraviolet light. The synthesized product is characterized by ultraviolet light, fluorescent light and the like, wherein the quantum yield of the fluorescent polymer can reach 74.2%. The cysteine and citric acid derivative fluorescent powder is coated on a silica-gel carrier so as to obtain light-emitting fluorescent powder. The invention provides a method for synthesizing polymer with a high fluorescence quantum yield from biocompatible nonfluorescent raw materials, and a method for simply preparing the fluorescent powder.

A process for preparing dimethyl sulfone includes the oxidizing reaction between dimethyl sulfoxide and H2O2 in Wt. ratio of 1:(0.44-0.65) at 80-150 deg.C for 4-40 hrs, cooling to educe out crystal, filtering, dewatering and baking. Its advantages are simple process high output rate (65-94%), and no generation of harmful substance and by-product.

The invention provides a sludge treating method. The sludge treating method comprises the following steps: subjecting sludge to full pyrohydrolysis, wherein pyrohydrolysis temperature is in a range of 180 to 190 DEG C, such a temperature range corresponds to saturated vapor pressure of 1.0 to 1.25 MPa, and pyrohydrolysis time is 20 to 60 min; carrying out rapid wet oxidation on a material having undergone pyrohydrolysis, wherein oxidation temperature is 130 to 170 DEG C, oxygen partial pressure is 0.5 to 1.0 MPa and oxidation time is 3 to 10 min; and subjecting the material having undergone rapid wet oxidation to solid-liquid separation so as to obtain a fertilizer for garden greening or matrix for soil improvement. The sludge treating method exerts substantial effect on reduction in water content of sludge; after solid-liquid separation, a separated liquid is clear, and the removal rate of heavy metals is high; and the method has the advantages of energy conservation, high efficiency, low usage requirements on equipment and low construction and operation cost.

The invention provides a method for catalytic conversion of heavy oil, which comprises a fluidized catalytic conversion process that: heavy hydrocarbon raw materials contacts a catalyst in a riser reactor or fluidized bed reactor to react; the reaction temperature is 400 to 650 DEG C (preferably 480 to 560 DEG C); the reaction pressure is 0.11 to 0.4MPa; the contact time is 0.05 to 5 seconds (preferably 0.1 to 3 seconds); and the weight ratio of the catalyst to the raw materials ( catalyst to oil ratio) generally is 3 to 15, preferably 5 to 12. The reaction products flow in a settler for catalyst and oil gas separation; the separated catalyst to be regenerated is stripped by a stripping section and enters a regenerator for coke burning regeneration; and the regenerated catalyst is cooled or directly returns to the riser reactor to be recycled. The method can solve the problems encountered in the resid-blend ratio improvement and gasoline upgrade and update processes of the prior catalytic conversion.

The invention discloses a method for continuously preparing 2,5-furandiformic acid by using a microchannel reaction device. The method comprises the following steps that 5-hydroxymethylfurfural and 2,2,6,6-tetramethylpiperidine-N-oxide are dissolved in water, and acetic acid is added dropwise to prepare a homogeneous solution A; sodium bromide and sodium chlorite are dissolved in water to preparea homogeneous solution B; sodium hydroxide is dissolved in water to prepare a homogeneous solution C; the homogeneous solution A and the homogeneous solution B are simultaneously pumped into a first micro-mixer and introduced into a first micro-reactor respectively; the homogeneous solution C and an effluent of the first micro-reactor are simultaneously pumped into a second micro-mixer and introduced into a second micro-reactor respectively, and an effluent is collected to obtain a product. The method for continuously preparing the 2,5-furandiformic acid by using the microchannel reaction device has the advantages that the sodium chlorite is taken as an oxidant, so that the low oxidant price, moderate reaction temperature, higher yield, better target product selectivity and other advantages are provided; the method is simple in operation and low in cost, continuous and uninterrupted production can be achieved, and the industrial application prospect is good.

The invention discloses an inter-section high low temperature gradient alcohol-division two-stage alcohol generation method which comprises the following steps: respectively reheating fresh synthesis gas and recycle gas, mixing the fresh synthesis gas with the recycle gas, introducing the mixed gas into a first reactor, and enabling part of carbon oxides to react to obtain methyl alcohol; cooling a mixture containing synthesis gas and methyl alcohol steam output from the first reactor, guiding the mixture to flow to a first methyl alcohol separator, separating out methyl alcohol, pressurizing the separated gas, preheating, then introducing into a second reactor, and enabling part of carbon oxides to react to obtain methyl alcohol; cooling a mixture containing synthesis gas and methyl alcohol steam output from the second reactor, guiding the mixture to flow to a second methyl alcohol separator, separating out methyl alcohol, preheating the separated gas which separately serves as the recycle gas and fresh synthesis gas, mixing the recycle gas and the fresh synthesis gas, and feeding the mixture into the first reactor so as to perform next round of circulating preparation of methyl alcohol. The invention further discloses an inter-section high low temperature gradient alcohol-division two-stage alcohol generation device. The method is relatively high in single-pass alcohol net value and relatively small in circulation ratio, achieves a ton-alcohol steam yield as high as 1.2-1.3 ton, and is high in energy heat recovery amount.

The invention relates to a multistage oxidation-membrane separation collaborative water treatment system and a process for a light-sound-electricity coupled energy field. The multistage oxidation-membrane separation collaborative water treatment system comprises three parts, namely a light-sound-electricity coupled energy field multistage oxidation unit, a dual-membrane separation unit and a disinfection and sterilization unit, wherein the light-sound-electricity coupled energy field multistage oxidation unit comprises a light-sound-electricity coupled energy field multistage oxidation reactorprovided with a light-sound ozone joint oxidation reaction zone and an electrochemical oxidation adsorption reaction zone; the dual-membrane separation unit consists of a first-stage nano-composite ultrafiltration membrane and a second-stage nano-composite ultrafiltration membrane; the disinfection and sterilization unit adopts an ultraviolet sterilizer. By using a coupling synergistic effect among an ozone oxidation technology, an ultraviolet photoxidation technology, an ultrasonic oxidation technology, an activated carbon adsorption technology, an electrochemical oxidation technology, a membrane separation technology and the like, the multistage oxidation-membrane separation collaborative water treatment system is efficiently integrated to form an integral inseparable reaction system ofwhich all parts are synergized; the multistage oxidation-membrane separation collaborative water treatment system can be used for carrying out multistage oxidation and degradation on organic pollutants in a water body and then separating and removing the organic pollutants, and effectively removing organic salts, in particular to high valence salt ions.

The invention relates to a method for synthesizing methyl isobutyl ketone. The method for preparing a Pd-Ca / Al2O3 catalyst comprises the following steps: taking an empty Al2O3 carrier, carrying out programmed heating to 450 DEG C, and roasting for 4 hours while keeping the temperature; taking the roasted Al2O3, impregnating in a calcium salt water solution at 20-80 DEG C for 2-6 hours, filtering, drying, and roasting to obtain modified gamma-Al2O3, wherein the calcium content is 0.10-1.50% by mass of the catalyst; and impregnating the modified gamma-Al2O3 in a palladium chloride solution at 10-80 DEG C for 0.5-4.0 hours, filtering, drying and roasting to obtain the catalyst, wherein the palladium content is 0.03-0.10% by mass of the catalyst. The catalyst has the advantages of low content of metallic palladium, low cost, high utilization ratio, high activity and high selectivity; and the conversion rate of acetone is at least 30.0%, and the selectivity of methyl isobutyl ketone is at least 93.0%.

The invention relates to a synthesis method of 2-bromo-5-fluorobenzotrifluoride, belonging to the field of chemical synthesis. The method uses orthotrifluoromethyl aniline as the initial raw material, and comprises the following steps: (1) Sandmeyer bromination reaction; (2) nitration reaction; (3) catalytic hydrogenation reduction reaction; and (4) diazotization fluorination reaction. According to the method, the orthotrifluoromethyl aniline used as the raw material is subjected to Sandmeyer reaction bromination, nitration, hydrogenation reduction and diazotization fluorination to finally synthesize the 2-bromo-5-fluorobenzotrifluoride. The 2-bromo-5-fluorobenzotrifluoride product has the advantages of high purity (up to 99.0% or above), fewer impurity varieties and stable quality and properties.

The present invention discloses process of synthesizing beta-pinene / maleic anhydride copolymer. Inside a solvent system, beta-pinene and maleic anhydride in the weight ratio of 0.5-5 to 1 are mixed and heated while adding free radical initiator to reaction for 6-18 to obtain beta-pinene / maleic anhydride copolymer. The synthesized beta-pinene / maleic anhydride copolymer has relatively great molecular weight, and the process has mild condition, moderate reaction temperature and time, convenient post treatment of the product and no need of one third component.

The invention discloses a novel Schiff base type amine antioxidant as well as a preparation method and application thereof. The novel Schiff base type amine antioxidant comprises a compound shown as aformula (I) or (II) in the description, wherein the R<1>, R<2>, R<3>, R<4>, R<5>, R<6>, R<7>, R<8>, R<9> and R<10> are at least selected from H or C1 to C20 straight-chain or branch-chain alkyls or contain benzene substitutes or contain O, S, N, P and / or Si alkyl or aryl; the R<1>, R<2>, R<3>, R<4>, R<5>, R<6>, R<7>, R<8>, R<9> and R<10> represent identical groups or different groups; X is at least selected from -S-, -O-, -NH-, or a formula shown in the description, wherein m is 0 or 1. The novel Schiff base type amine antioxidant provided by the invention has excellent thermal stability andgood anti-oxidization performance; the preparation process is simple; the novel Schiff base type amine antioxidant is suitable for large-scale production and can be widely applied to various fields such as lubricating oil, liquid fuel, thermal plastic polymers, resin or oligomers or natural or synthetic plastics or rubber or elastomers.

The invention relates to the technical field of energy conservation and emission reduction and particularly relates to an urea-solution pyrolysis system for flue-gas denitrification. The urea-solutionpyrolysis system comprises a flue-gas turbine (1), a connecting flue (2), a waste-heat boiler (3), leading-out flues (4) and an urea pyrolysis device (5), wherein the flue-gas turbine (1) is connected with the waste-heat boiler (3) by the connecting flue (2); the two ends of the connecting flue (2) are externally connected with the leading-out flues (4); the urea pyrolysis device (5) is arrangedon one leading-out flue (4). The urea-solution pyrolysis system has the beneficial effects that the structure is simple, the operating cost is low, the heat needed for urea pyrolysis reaction can be provided by effectively utilizing flue gas, suitable urea-pyrolysis reaction temperature and fuller urea pyrolysis are ensured, so that the risk of blockage and damage of pipeline equipment caused by crystal due to incomplete urea pyrolysis is reduced, ammonia gas obtained by urea pyrolysis can react with nitrogen oxides more fully, and the energy-conserving and emission-reducing effects and the pollution-free and environment-friendly effects are achieved.

The invention discloses a method of preparing near-infrared carbon quantum dots by taking Coomassie brilliant blue as a carbon source. The preparation method comprises the following steps: weighing a certain amount of turmeric extraction residue, placing the turmeric extraction residue in a reaction kettle, adding an appropriate amount of secondary water, placing the turmeric extraction residue in an electrothermal blowing dry oven and reacting, after the reaction is ended, taking out the turmeric extraction residue, naturally cooling to a room temperature, and filtering to obtain a carbon quantum dot solution for later use; preparing a Coomassie brilliant blue solution, uniformly mixing the Coomassie brilliant blue solution with carbon quantum dots, adding an appropriate amount of secondary water, transferring the mixed solution to a hydrothermal reaction kettle, placing the mixed solution in the electrothermal blowing dry oven for reacting, after the reaction is ended, taking out the mixed solution, naturally cooling to the room temperature, and filtering to obtain the near-infrared carbon quantum dots. The product obtained by the method disclosed by the invention is stable in property and good in fluorescence performance, has important application value in the fields of bioimaging, sensing, medicine delivery, photocatalysis, biological living imaging and the like, and uses the turmeric extraction residue as a raw material for realizing waste recycling without the need of a catalyst.

The invention discloses a method for synthesizing m-trifluoromethyl acetophenone which is an important intermediate for medicine, pesticide and pigment. According to the method, m-trifluoromethylaniline as the initial raw material is diazotized to prepare a diazonium salt which is coupled with acetaldoxime under the catalysis of a copper salt by controlling the pH value at 4-4.5 and the temperature at 0-5 DEG C, and the coupling compound is extracted by an organic solvent and then hydrolyzed by using hydrochloric acid to obtain the m-trifluoromethyl acetophenone. The total yield of the m-trifluoromethyl acetophenone produced according to the method is more than 70 percent; and the reaction conditions of the method are simple, the yield is high, the pollution is small, and the method is applied to industrial production.

The invention belongs to the technical field of environmental protection and discloses a long-branched-chain water-soluble polymer water treatment agent and a preparation method and an application of long-branched-chain water-soluble polymer water treatment agent. The preparation method comprises the steps of: adding water-soluble acrylic acid monomers, long-carbon-chain fat monomers, an initiator, a chain transfer agent and a co-solvent into a high-pressure kettle; inputting carbon dioxide into the high-pressure kettle to remove air, and sealing; adding carbon dioxide and carrying out free radical precipitation polymerization under the condition of super-critical carbon dioxide at 50-90 DEG C and 12-22Mpa and under the blending condition; under the condition that the pressure of the system does not increase, cooling to obtain a crude product; and conducting the super-critical carbon dioxide in-situ extraction purification on the crude product under the same condition of the super-critical carbon dioxide to obtain the long-branched-chain water-soluble polymer water treatment agent. The water treatment agent of the invention has the characteristics of fast pH response speed, relatively high turbidity removal rate of sewage, relatively high colority removal rate and relatively high CODCr (chemical oxygen demand measured by dichromate method), simple and convenient synthesis method, high purity of product, no generation of toxic side products and stable room-temperature storage property.

The invention discloses an efficient purifying method for exhausted tail gases from firing of gangue baked bricks in a portable tunnel kiln. The efficient purifying method comprises the following process steps of stacking raw materials: stacking green gangue bricks and limestone in an annular kiln bottom between annular tracks of the portable tunnel kiln; roasting the green gangue bricks and the limestone in the kiln to desulfurize: roasting the green gangue bricks and the limestone in an arc kiln body according to a certain temperature raising procedure, and performing primary desulfurization by high-temperature roasting; performing wet flue gas desulfurization: feeding the calcined limestone into a desulfurizing liquid adjusting pool, and adjusting the basic strength in the adjusting pool; introducing tail gases in the kiln body into a desulfurizing tower, sprinkling the desulfurizing liquid in the desulfurizing liquid adjusting pool into the desulfurizing tower, and performing secondary desulfurization by a chemical reaction generated in the desulfurizing tower. According to the efficient purifying method disclosed the invention, by the adoption of a combined desulfurization method of desulfurization by roasting in the kiln and the wet flue gas desulfurization, the problems of desulfurization and purification of the tail gases in the portable tunnel kiln are successfully solved; meanwhile, energy sources can be saved, and the purification cost is reduced.

The invention relates to a new method for catalyzing and cracking waste polystyrene (PS) to generate aromatic hydrocarbon raw materials, such as styrene and the like, so as to realize chemical recycling of the polystyrene. The method is characterized by adopting a mesoporous molecular sieve MxO / MCM-41 carrying alkali metals and / or alkaline-earth metals as a catalyst (wherein M is an alkali metal and an alkaline-earth metal, such as Li, Na, K, Mg, Ca, Ba and the like, or a compound thereof, and x is 1 or 2) and comprising the steps of: carrying out cracking reaction at 300-450 DEG C in the presence of normal pressures, or pressure reduction or nitrogen introduction; and obtaining aromatic hydrocarbon compounds, such as toluene, ethylbenzene, styrene and the like, by operations of rectification and the like after reaction. The catalyst can be recycled directly without any processing. The cracking rate of the polystyrene is greater than or equal to 98%, the yield of a liquid product is greater than or equal to 95%, and the content of styrene in the liquid product is above 80%. Compared with the prior art, the method has the characteristics that the yield of liquid and the selectivityof styrene are higher, the reaction temperature is mild, and the recycling property of the catalyst is good.

The invention discloses a novel synthesis of a fluorescent polymer nano point. By adopting natural products of tartaric acid and citric acid as raw materials, the nitrogen-doped fluorescent polymer nano point is prepared through a reaction with ethanediamine in oleic acid, and a synthesis product is subjected to infrared characterization, ultraviolet characterization, fluorescence characterization, circular dichroism characterization, NMR characterization and a TEM characterization, the quantum yield of the synthesis product is capable of reaching 48.7 percent maximally, and a CD signal is achieved, and thus a method for synthesizing the fluorescent polymer nano point by using a non-fluorescence raw material with biocompatibility is provided.

The invention relates to an improved preparation method of acetyl diammonium phosphate. According to the improved preparation method, phosphoric acid is reacted with acetic anhydride firstly so as to obtain acetyl phosphate, and then ammonium hydroxide is added so as to obtain acetyl diammonium phosphate. The improved preparation method is simple in operation, high in yield, and low in cost, and is especially suitable for industrialized production.

The invention discloses a flame-retardant modified silane coupling agent and a preparation method thereof, and belongs to the field of fire retardants. The molecular structural formula of the flame-retardant modified silane coupling agent is as follows: R is alkylidene and alkane arylene or secondary amino group alkylidene, and x is alkoxy. The preparation method comprises the following steps of: (1) adding 2-methyl-2.5-dioxy-1.2-dioxaphospholane and an organic solvent to a reactor, then adding a catalyst, uniformly stirring, and dropping amino siloxane to react at the temperature of 20-120 DEG C for the time of 4-24 hours to obtain reaction liquid; (2) separating the reaction liquid obtained from the step (1) by using a separating funnel to obtain a sticky matter, then removing the solvent of the sticky matter, and carrying out vacuum drying for 3 hours to finally obtain the flame-retardant modified silane coupling agent which contains phosphorus and nitrogen. The flame-retardant modified silane coupling agent disclosed by the invention has better flame-retardant effect.

The invention relates to the technical field of thermal interface materials, in particular to MXene nanosheet compounded thermal conductive gel with thermal self-repairing performance and a preparation method of the MXene nanosheet compounded thermal conductive gel. The thermal conductive gel comprises the following components: vinyl-terminated polydimethylsiloxane, a chain extender, a cross-linking agent, a silane coupling agent, an inhibitor, a catalyst, a thermal self-repairing polymer, a conventional thermal conductive filler and an MXene nanosheet. The MXene nanosheet and a conventional heat-conducting filler cooperate to construct a heat-conducting path, so that the thermal resistance is reduced, and the heat-conducting property is improved; and the thermal self-repairing polymer component has a reversible dynamic coordination bond sensitive to temperature, and can be crosslinked again to form a crosslinked network, so that the thermal conductive gel has a self-repairing function, and the service life of the thermal conductive gel is prolonged. The preparation method is simple, the reaction temperature is moderate, the organic matrix and the heat-conducting filler are fully crosslinked, the interface thermal resistance is reduced, meanwhile, the phenomena of oil overflow, dry solid pulverization and the like are effectively overcome, and the product reliability is improved.

The invention relates to water-boiling-resistant polyester resin and a preparation method thereof. The resin is obtained by performing condensation polymerization on small-molecule dibasic acid or anhydride, small-molecule dibasic alcohol, organic polyol and polycarbonate diol in the presence of an esterification catalyst. By virtue of polymerization reaction, carbonate bonds are introduced into the structure of the water-boiling-resistant polyester resin, so that excellent wear resistance and durability are provided for a water-boiling-resistant coating, and meanwhile, the water boiling resistance of the resin is not influenced; and moreover, the raw materials adopted by the polymerization reaction are low in price and easy to obtain, the preparation method is simple and easy to operate, reasonable in process design, and suitable for large-scale industrial production.

The invention provides a high-selectivity synthesis method of a compound, namely 1,3,3-trimethyl-2-oxabicyclic[2,2,2]octane, as shown in the formula (I). The method is high in selectivity and high inconversation rate; the catalyst can be recycled; and the method is safe, environment-friendly, simple and convenient in operation and suitable for industrialized mass production.