1178 results about "Chemical technology" patented technology

The invention discloses a self-crosslinking temperature-resistant salt-resistant emulsion type fracturing fluid thickening agent and a preparation method thereof, and belongs to the technical field of oilfield chemistry. The raw materials adopted by the invention comprise 30 to 50 parts of an oily solvent, 15 to 25 parts of deionized water, 10 to 20 parts of acrylamide, 5 to 10 parts of acrylic acid, 2 to 4 parts of 2-acrylamido-2-methylpropanesulfonic acid, 0.05 to 0.2 part of a crosslinking monomer, 0.5 to 1 part of a quaternary ammonium salt type hydrophobic association monomer, 4 to 8 parts of an emulsifier and 1 to 2 parts of a phase inversion agent. The self-crosslinking emulsion is formed through water phase-oil phase mixing, high-speed emulsification, low-temperature initiation polymerization and phase inversion treatment. Based on physical-chemical double-crosslinking temperature control cooperation, a salt-resistant-hydrophobic double-shielding mechanism and an integrated design without an exogenous crosslinking agent, the contradiction between the temperature-resistant and salt-resistant performance of a traditional thickening agent and the process complexity is broken through, and a technical support is provided for efficient development of high-temperature and high-salt oil and gas reservoirs.

The invention provides a multi-modal characterization molecular property prediction method based on hierarchical bidirectional cross attention, and relates to the technical field of machine learning assisted organic chemistry, and the method comprises the following steps: S10, generating same-molecule multiple sequences for data enhancement; s20, coding the sequence features through a pre-trained molecular language model MolBERT; s30, performing multi-modal feature fusion through a layered bidirectional cross attention mechanism; s40, establishing a prediction head; s50, in the reasoning stage, only the feature extraction and fusion steps are executed, and a molecular property prediction result is output through the trained prediction head. According to the method, the molecular sequence, the topological graph structure and the fingerprint features are effectively integrated, so that the prediction precision of the model on a plurality of MoleculeNet (molecular network benchmark) public data sets is superior to that of an existing method.

The invention provides a multi-level organic chemistry reaction prediction method based on double encoders, and belongs to the technical field of machine learning assisted organic chemistry. The technical problems that a Transform model lacks attention to intermolecular interaction, coding is insufficient, and generalization ability is not high are solved. According to the technical scheme, the method comprises the following steps: S10, preprocessing a chemical reaction SMILES sequence data set; s20, performing feature extraction on the input chemical reaction by using an atom encoder and a molecular encoder; s30, multi-level feature fusion is applied to atomic and molecular feature representation; s40, weight addition is carried out on the model prediction result, the loss obtained by the target and the loss obtained by comparative learning, and the model is trained; and S50, predicting a chemical product by using the trained model. The method has the advantages that the accuracy of chemical product prediction is improved, and the generalization ability of the model is improved.

The invention discloses a self-cleaning active resistance reducing agent and a preparation method thereof, and belongs to the technical field of oilfield chemistry. The resistance reducing agent is prepared from the following components in mass concentration: 30-50% of a composite copolymer, 1-15% of a desorption promoting agent, 0.02-0.4% of a suspension main agent, 0.15-0.6% of a suspension activating agent and the balance of a solvent, the preparation method comprises the following steps: firstly, dissolving polyvinyl alcohol and carboxymethyl hydroxypropyl guanidine gum in water to form an aqueous solution, and adding acrylamide, sodium acrylate, a rigid monomer containing a benzene ring, a reinforcing agent and urea into the aqueous solution to obtain a composite reaction solution; adding an initiator to carry out polymerization reaction to obtain polymer colloid; and cutting, crushing and drying the polymer colloid to obtain composite copolymer powder. The resistance reducing agent disclosed by the invention has a thickening effect, strengthens the characteristics of low adsorption and low residue of a polymer on the basis of having variable viscosity and strong sand-carrying capacity, also has the effects of promoting the dissociation of adsorbed gas into free gas and dredging and cleaning a stratum, and effectively improves the oil and gas recovery ratio and the stable production capacity.

The present invention relates to the field of oilfield chemical technology, and proposes a fast-soluble hydrophobic associating polymer for reinjection water for fracturing and a preparation method thereof. Hydrophobic functional monomers and non-ionic polarity regulators are prepared into polymerizable hydrophobic associating micelles, and the polymerizable hydrophobic associating micelle solution and conventional monomer aqueous solution are mixed. The molecular weight of the copolymer is regulated by a molecular weight regulator, and the fast-soluble hydrophobic associating polymer for reinjection water is obtained after reaction, granulation, drying and crushing. It comprehensively utilizes the synergistic effect of the multi-component supramolecular forces of the ternary hydrophobic functional monomers to achieve stability regulation of the associating micelles, and obtains a three-dimensional network structure of salt-resistant polymers with a dense associating network and a strong associating effect; introduces a polarity regulator containing a non-ionic hydrophilic structure, and utilizes self-assembly to form a hydration layer on the surface of the associating micelles, thereby weakening the water-phase aggregation effect and ion shielding effect of the hydrophobic structure, which is beneficial to the stretching of the molecular chain in the water phase, and obtaining the online mixing and fast-dissolving efficiency of the reinjection water, and having both high salt resistance and strong sand carrying performance.

The invention discloses a drilling fluid plugging agent based on modified resin and fibers, and relates to the technical field of oilfield chemistry. The plugging agent comprises modified phenolic resin, modified epoxy resin, modified urea resin, modified polyester fiber and modified glass fiber. The modified phenolic resin is prepared by modifying phenolic resin with ethyl silicate, the modified epoxy resin is prepared by reacting a carbon nanotube grafted with a silane coupling agent with epoxy resin, and the modified urea-formaldehyde resin is prepared by reacting diisocyanate with urea-formaldehyde resin. The modified polyester fiber is prepared by reaction of a silane coupling agent and polyester fiber, and the modified glass fiber is prepared by reaction of boric acid ester and glass fiber etched by hydrofluoric acid. The plugging agent disclosed by the invention has excellent temperature resistance and pressure-bearing strength, and meanwhile, the influence on the rheological property of the drilling fluid is relatively small.

The invention discloses an electrocatalytic oxidation method for highly selectively converting 5-hydroxymethylfurfural into 2, 5-furandicarboxylic acid by using a cobalt-nickel bimetallic catalyst, and belongs to the technical field of electrochemistry. Firstly, foamed nickel is pretreated; secondly, preparing a cobalt-nickel mixed solution, synthesizing the catalyst by adopting a solvothermal method, and characterizing the catalyst; and thirdly, preparing a three-electrode system by taking the cobalt-nickel catalyst as a working electrode, a spiral platinum wire electrode as a counter electrode, a Hg / HgO electrode as a reference electrode, an alkaline solution as an electrolyte and a Nafion 117 proton membrane as a diaphragm to realize conversion. And finally, testing the stability and cyclicity of the cobalt-nickel catalyst. Under the same potential, the material has the highest current density, the maximum electrochemical active area and the optimal charge transfer rate; the self-degradation of HMF can be effectively inhibited, the electrocatalytic oxidation has lower initial potential than the oxygen evolution reaction, and the electrode cycle stability is good; the method is simple in process, mild in condition and beneficial to industrial production.

The invention provides a curing agent mix proportion design method for a nomadic type flow state solidified soil production line, and belongs to the technical field of computational chemistry, the method comprises the following steps: collecting an original soil sample of a to-be-borrowed area such as a beach culture sludge area, carrying out basic property determination, and establishing a multilayer neural network original soil evaluation system to carry out quantitative evaluation on the adaptability of original soil; constructing a five-layer neural network curing agent constraint system to determine a ratio range; designing a test scheme by adopting a Latin hypercube sampling method; establishing a multi-layer neural network performance evaluation system and a reaction mechanism system for comprehensive evaluation; preparing a standard test block to determine engineering performance; a matching scheme is verified through production line trial production, an engineering performance verification matrix is established, and a fuzzy comprehensive evaluation method is adopted to ensure that the performance meets engineering requirements. According to the scheme, the systematic design and optimization of the curing agent ratio are realized through the synergistic effect of a plurality of neural network models.

The invention relates to the technical field of oilfield chemistry, and discloses a temperature-resistant and salt-resistant in-situ plugging reinforced gel composition, gel, and a preparation method and application thereof. The gel composition contains a first monomer, a second monomer, a first cross-linking agent, a second cross-linking agent, an initiator, a reinforcing agent and water, optionally, the composition also contains a third monomer. The gel provided by the invention can be re-crosslinked under the stimulation of high temperature and CO2 acidic conditions to form blocky integral gel, so that the problems of crosslinking uncertainty, chromatographic separation, easiness in causing reservoir damage and the like of an underground crosslinking system are avoided, and meanwhile, the enhancement of the plugging capacity under the in-situ reservoir condition is realized.

The invention discloses bacillus pumilus, a complex microbial inoculant and application of the complex microbial inoculant in a saline-alkali soil four-dimensional improvement method, and belongs to the technical field of microorganism application. According to the invention, a strain of bacillus pumilus is screened, and the bacillus pumilus has excellent saline-alkaline tolerance, has multiple functions of producing organic acid, proline, siderophore, trehalose, IAA and betaine and the like, and has obvious advantages in saline-alkali soil improvement; the stress resistance of plants is improved through multiple mechanisms, nutrient absorption is promoted, the soil structure and chemical environment are improved, the stability and diversity of soil microbial communities are enhanced, and then effective treatment on the saline-alkali soil is achieved. According to the four-dimensional improvement method for the saline-alkali soil, the microbial technology, the physical technology, the chemical technology and the nutrition technology are combined, the saline-alkali soil is improved from the four dimensions of physics, chemistry, biology and nutrition, soil can be effectively improved, and repeated planting is not likely to happen.

The invention discloses a separation and purification method of soy sauce flavor type vinasse polypeptide and application thereof, and belongs to the technical field of polypeptide separation and purification. The method comprises the following steps: S1, pretreatment: drying and crushing soy sauce flavor type vinasse, then treating by adopting a pulsed electric field cooperating with cellulase and Tween, setting the intensity of the pulsed electric field to be 1.0-1.5 kV / cm, adjusting the pulse width to be 10-20ms, keeping the frequency to be 10-15Hz, and controlling the temperature to be 20-30 DEG C; the addition amount of the cellulase is controlled to be 50-80 U / g of dry weight of the vinasse, the treatment time is 2-3 h, and meanwhile low-concentration Tween is added; s2, carrying out composite enzymolysis; s3, gradient membrane separation; and S4, dynamic ion exchange chromatography. Through cooperation of multiple physical-biological-chemical technologies, a complete technical chain for efficient separation and purification of soy sauce flavor type vinasse polypeptide is constructed.

The invention discloses a high-activity graphene quantum dot and a preparation method thereof, and relates to the technical field of oilfield chemistry, and the preparation method comprises the following steps: uniformly ground carbon source and nitrogen source are mixed, heated, fully reacted and cooled, uniformly dispersed in deionized water by ultrasonic waves, and then subjected to suction filtration, dialysis and freeze drying to obtain the nitrogen-containing graphene quantum dot. The preparation method comprises the following steps: dispersing nitrogen-containing graphene quantum dots, fatty alcohol-polyoxyethylene ether carboxylic acid and a catalyst in absolute ethyl alcohol, carrying out ultrasonic oscillation for 30 minutes, carrying out reflux reaction, and carrying out reduced-pressure rotary evaporation, thereby obtaining the nitrogen-containing graphene quantum dots. The prepared high-activity graphene quantum dots are small in particle size, high in activity and capable of entering small pores to peel crude oil, so that the recovery efficiency can be remarkably improved, the point injection allocation process is simple, the high-activity graphene quantum dots can be rapidly dispersed into injected water, an additional injection allocation device is not needed, and the construction cost is low.

The invention discloses a self-degradable granular temporary plugging agent for fracturing as well as a preparation method and application thereof, and relates to the technical field of oilfield chemistry. The temporary plugging agent is prepared by melting, blending and crushing the following materials in percentage by mass: 70%-85% of poly (3-hydroxybutyrate-co-4-hydroxybutyrate), 10%-20% of poly (3-hydroxybutyrate-co-4-hydroxybutyrate), 10%-20% of poly (3-hydroxybutyrate), 2%-10% of an auxiliary agent for assisting degradation; 10%-15% of nano silicon dioxide; 1%-7% of sodium starch glycolate. The temporary plugging agent disclosed by the invention contains the disintegrant glycolic acid starch sodium which is extremely high in water absorption capacity, and can rapidly absorb water and expand the volume of the temporary plugging agent by 250-300 times, so that the temporary plugging agent expands to generate cracks, on one hand, gaps among particles can be reduced after the temporary plugging agent absorbs water and expands in the early stage of plugging, and the compactness of a whole plugging layer is increased; on the other hand, cracks are generated on the surface of the temporary plugging agent after expansion, and water can permeate into temporary plugging agent particles from the cracks, so that the contact area between the temporary plugging agent and the water is increased, the degradation of the temporary plugging agent is promoted, and the overall degradation time is shortened.

The present invention discloses a self-degradable particle temporary plugging agent for fracturing and its preparation method and application, relating to the field of oilfield chemical technology. According to mass percentage, the temporary plugging agent is obtained by melt blending and crushing the materials including the following components: poly (3-hydroxybutyric acid-co-4-hydroxybutyrate), 70%-85%; auxiliary agent for auxiliary degradation, 2%~10%; nano silicon dioxide 10%~15%; sodium starch glycolate, 1%~7%. The temporary plugging agent of the present invention contains disintegrant sodium starch glycolate, which has a strong water absorption capacity and can quickly absorb water and expand its own volume by 250~300 times, so that the temporary plugging agent expands and cracks appear. On the one hand, in the early stage of plugging, the temporary plugging agent can reduce the gap between particles after absorbing water and expanding, thereby increasing the density of the entire plugging layer, thereby improving the plugging ability. On the other hand, cracks are generated on the surface of the temporary plugging agent after expansion, and water can penetrate into the interior of the temporary plugging agent particles from the cracks, which increases the contact area between the temporary plugging agent and water, thereby promoting its degradation and shortening the time of overall degradation.

The invention belongs to the technical field of medicinal chemistry, and discloses a paeonol mannich base-rhein conjugate as well as a preparation method and application thereof. The conjugate is a compound as shown in a general formula (I) or (II) or a pharmaceutically acceptable salt thereof. Compared with the clinically common antitumor drugs fluorouracil and paeonol, the conjugate provided by the invention has obviously higher in-vitro anti-human hepatoma carcinoma cell (HepG2) and human lung cancer cell (A549) proliferative activity, and the in-vitro anti-human cervical carcinoma cell (Hela), human colon cancer cell (HT29) and human osteosarcoma cell (U2OS) proliferative activity of most compounds is obviously superior to that of fluorouracil and paeonol; and the conjugate has good water solubility, is expected to be applied to treatment of various cancers such as cervical cancer, colon cancer, osteosarcoma, lung cancer or liver cancer, and has a wide clinical application prospect. # imgabs0 #

The present invention relates to the technical field of daily chemical technology, and specifically provides a whitening and freckle-removing cream. The freckle-removing cream comprises the following components in parts by weight: water, glycerin, mineral oil, antioxidant microcapsules, polydimethylsiloxane, sodium ascorbyl phosphate, niacinamide, a plant compound extract, essence, and cetearyl alcohol. The present invention adds natural plant extract ingredients, which is safe and effective. A circulation device is used to promote the effective combination of active ingredients, so that the active ingredients can quickly penetrate into the inner layer of the skin, thereby improving the transdermal absorption ability of the active ingredients. A unique encapsulation technology is used to firmly adhere the active ingredients to the skin surface, thereby effectively lightening facial spots, removing dullness from the skin, and restoring luster.

The invention discloses a cementing wall-fixing agent while drilling as well as a preparation method and an application process thereof, belongs to the technical field of oilfield chemistry, and particularly relates to preparation of the cementing wall-fixing agent while drilling. The preparation method of the while-drilling cementing wall-fixing agent comprises the step of uniformly mixing and stirring the thermoplastic resin, the curing agent and the inorganic powder according to the proportion at normal temperature and normal pressure. The wall-fixing agent material is simple and safe in production process, low in material cost and convenient for large-scale production and application, and the product can block pores, reduce the filter loss, bond sand shale strata and improve the pressure-bearing capacity of the strata, so that the aim of stabilizing the well wall is fulfilled. The invention further provides an application process of the while-drilling cementing wall-fixing agent. The application process comprises an applicable drilling fluid system and dosage and construction processes under different formation porosities and different working conditions.

The invention belongs to the technical field of chemical engineering, particularly relates to a preparation method and a preparation device of electronic-grade hexafluorobutadiene, and aims to provide a brand-new hexafluorobutadiene synthesis route which can fundamentally solve the bottleneck problem in the existing hexafluorobutadiene production or preparation method. According to the preparation method, chlorotrifluoroethylene is taken as a main raw material, and the electronic grade 4N hexafluorobutadiene meeting the application of the semiconductor industry is prepared through two steps of catalytic polymerization and finished product rectification. The process raw materials and the device are high in utilization rate, impurities such as heptafluorobutene and hexafluorocyclobutene which are difficult to purify do not exist, the quality of the produced finished product can be effectively guaranteed under the condition that the cost is low, and then the technology is more competitive.

The invention belongs to the field of chemical technology innovation, and relates to a preparation method for producing an anhydrous formaldehyde catalyst. The catalyst is composed of transition metal and non-metal nitrogen-carbon doped molecular sieves, acidic sites and charge distribution of the molecular sieves are regulated and controlled through nitrogen-carbon doping, meanwhile, metal agglomeration in the reaction process is slowed down through formed metal-N-C bonds, the stability of the catalyst is improved, and the service life of the catalyst is prolonged. The catalyst shows excellent methanol anaerobic dehydrogenation catalytic activity within the temperature range of 400-700 DEG C, the methanol conversion rate reaches 90-99%, meanwhile, the formaldehyde yield reaches 57-67%, and the catalytic performance is kept stable within 70 h.

The invention relates to the technical field of chemistry, and particularly discloses a device and method for measuring freezing point decline, and the device comprises a hood shell, a control system and a measuring mechanism; the control system is installed on the right side of the exterior of the hood shell and electrically connected with the hood shell. The measuring mechanism is arranged below the hood shell and comprises a bottom shell, a track platform, a clamping mechanical arm, a test tube rack, a liquid injection part, a solid adding part, cooling bath manufacturing equipment, a measuring part, test tube cleaning and drying equipment, a first pump body, a second pump body and a sensor. According to the device for measuring freezing point drop and the measuring method, the freezing point is measured by adopting full-process automatic operation, the experimental environment and process are more stably controlled, the consistency of experimental operation is ensured, the measuring time of a single sample is shortened, and the overall experimental efficiency is improved.

The invention discloses a method for preparing low-sulfate basic nickel carbonate, and belongs to the technical field of chemical engineering, a three-stage grading washing process is designed through precipitant selection and grading washing processes, each stage of washing has specific purposes and conditions, and particularly, ammonium sulfate and residual sulfate radicals are subjected to competitive reaction in secondary washing, so that the low-sulfate basic nickel carbonate is prepared. The method effectively solves the problem of high sulfate radical content of basic nickel carbonate in the prior art, improves the purity and performance of the product, and has the advantages of simple operation, low cost and the like. The process method has good application prospects and market value and is expected to be widely applied to the field of chemical material preparation.

The invention relates to a preparation method of a rubber composition and a bushing for an aircraft, belongs to the technical field of rubber products and chemical engineering, and solves the problems of low tearing strength, poor dynamic performance, no cutting resistance and relatively high density of a rubber composition prepared by adopting an existing method. The preparation method comprises the following steps: 1, softening rubber, adding a reinforcing filler, an anti-aging agent, a vulcanizing activator, a silane coupling agent, phenolic resin and high styrene resin in proportion, mixing, and discharging rubber to obtain a mixture; 2, standing the mixture obtained in the step 1, adding a vulcanizing agent, a vulcanization accelerator and a formaldehyde donor, and mixing to obtain a rubber compound; 3, vulcanizing and crosslinking the rubber compound obtained in the step 2 to obtain a rubber bushing composition; in the step 3, the vulcanization temperature is 135 to 170 DEG C, and the vulcanization time is 5 to 100 minutes.

The invention discloses a polyether modified silicone oil hydrophobic retanning fatliquor as well as a preparation method and application thereof, and belongs to the technical field of leather chemical industry. The preparation method comprises the following steps: preparing polyether modified silicone oil from end hydrogen-containing silicone oil and allyl polyether as raw materials, uniformly dispersing the polyether modified silicone oil, an emulsifier and water to obtain a water-in-oil emulsion, adding water into the water-in-oil emulsion, uniformly dispersing to obtain an oil-in-water mixture, adding deracetam BTL, and uniformly dispersing to obtain the deracetam emulsion. The tensile strength, the tearing strength and the hydrophobic effect of leather treated by the polyether modified silicone oil hydrophobic retanning fatliquor are remarkably improved, the complete infiltrating time of the leather can reach 10 min, meanwhile, it can be guaranteed that the leather has good softness, and the additional value of the leather can be increased.

The invention relates to the technical field of chemical engineering, and discloses a mullite heat-insulating brick and a preparation method thereof.According to the heat-insulating brick, the toughness of a matrix is enhanced through evenly-distributed mullite whiskers, the mechanical property and the heat insulation property of the heat-insulating brick are optimized through a gradient porous structure, and Ni-Ti particles are introduced to regulate and control the heat conductivity. The bending strength of the heat insulation brick can reach 30-34 MPa, the heat conductivity is as low as 0.14-0.16 W / m.K, and the heat insulation brick has excellent thermal shock resistance at the high temperature of 1600 DEG C. Compared with the traditional mullite heat-insulating brick, the product disclosed by the invention shows higher mechanical strength, excellent heat-insulating effect and intelligent heat management capability, and is suitable for the fields of high-temperature kilns, metallurgical industry, spacecraft heat protection and the like.

The invention discloses an input-output method and system realized based on a calculation engine in the coal chemical industry, and relates to the technical field of coal chemical industry, and the method comprises the steps: building a molecular model based on a reaction network of a coal molecular structure, and updating the parameters of the molecular model in real time through extended Kalman filtering; constructing a data fusion layer through a hybrid modeling technology, and constructing a coal chemical industry residual learning architecture by using a mechanism model and a neural network series structure; evaluating a data-driven model prediction confidence interval according to a Monte Carlo method; a digital twin verification platform is constructed based on hardware-in-the-loop test, and a data-driven adaptive iteration mechanism is constructed through an online and offline collaborative updating mechanism. The method has the beneficial effects that the medium component fluctuation is accurately captured, the output accuracy is improved, reliable evaluation dependence is provided, and the real-time response force and long-term stability of the system in a complex environment are improved.

The present invention belongs to the field of pharmaceutical chemical technology, and specifically relates to a method for analyzing chiral impurities of L-carnitine key intermediate L-carnitine. The method first uses (S)-2-(6-methoxy-2-naphthyl) propionyl chloride as a derivatization reagent to derive L-carnitine, and then uses high performance liquid chromatography to separate and detect the derivatized L-carnitine. The present invention proposes for the first time to use HPLC to determine the chiral purity of L-carnitine, which has simple steps and mild conditions, and is conducive to industrial promotion and application; the method of the present invention has strong specificity, high sensitivity, and good durability, and can be used for the accurate determination of the chiral purity of L-carnitine.

The invention relates to the technical field of daily chemicals, in particular to a collagen composition suitable for sensitive skin and having multiple effects and application of the collagen composition. The composition comprises the following components: a haw fruit extract, a ginseng root extract, an artemisia annua extract and a centella asiatica extract. The collagen face cream with multiple effects on sensitive skin provided by the invention is mild and skin-friendly, is suitable for people with sensitive skin, selects a low-irritation emulsification system and high-skin-friendly grease, does not contain alcohol, sensitization essence and high-sensitization preservative, has the pH value regulated between 5.2 and 6.0, is close to the slightly acidic environment of human skin, and has the advantages of mild skin-friendly effect, mild skin-friendly effect and good skin-care effect. The irritation and burden on sensitive skin are effectively reduced.

The invention discloses a water-based adhesive and a preparation method thereof, and relates to the technical field of chemical engineering. The preparation method comprises the following steps: putting polybutylene adipate polyester polyol and homemade polyol into a reaction kettle 1, vacuumizing, cooling, adding a catalyst, adding isophorone diisocyanate, heating, carrying out heat preservation treatment, adding a modifier and a hydrophilic chain extender, carrying out a stirring reaction, adding 1, 4-butanediol, continuously carrying out a reaction while adding acetone to reduce viscosity, and cooling to obtain a polyurethane prepolymer; adding triethylamine into the prepolymer for salinization, dispersing deionized water into the prepolymer under high-speed stirring, stirring to obtain an acetone-containing water-based emulsion, continuously dropwise adding ethanediamine for chain extension reaction, and finally performing reduced-pressure extraction to remove acetone to obtain the water-based polyurethane adhesive. The polyurethane adhesive prepared by the preparation method disclosed by the invention has excellent mechanical property and flame retardant property.

The invention relates to the technical field of chemical engineering, and discloses a trichlorosilane hydrogen reduction polycrystalline silicon growth monitoring system fusing multi-source data. Comprising a multi-sensor monitoring module, a multi-sensor data acquisition module, a multi-source data preprocessing module, a growth process data analysis module, a growth state online evaluation module, a process parameter online regulation and control module, a regulation and control result feedback module and a system collaborative management module, the multi-sensor monitoring module monitors the growth process of trichlorosilane hydrogen reduction polycrystalline silicon through multiple sensors, the multi-sensor data acquisition module acquires original data, the multi-source data preprocessing module preprocesses the data, the growth process data analysis module carries out data calculation, and the growth state online evaluation module carries out online comprehensive evaluation. The process parameter online regulation and control module regulates and controls process parameters online, the regulation and control result feedback module generates an adjustment strategy, and the system collaborative management module performs system parameter recording and storage, system optimization and exception handling.

The invention belongs to the technical field of degradation and recovery of high polymer materials, and discloses a subcritical hydrothermal catalytic degradation and recovery method of acid anhydride / glycidyl ether epoxy resin, which comprises the following steps: placing an anhydride / glycidyl ether epoxy resin sample and a nitric acid solution in a hydrothermal reaction kettle; raising the temperature through a program temperature control device and maintaining a constant-temperature reaction. The degradation rate of 80.6%-100% of the epoxy resin can be achieved through the hydrothermal degradation reaction. Compared with a traditional thermal cracking and supercritical fluid degradation process, the method has the advantages that an acidic degradation system without organic solvent addition and transition metal catalysis is innovatively constructed, and efficient degradation of an epoxy resin network structure is realized under the subcritical hydrothermal condition. The process has the characteristics of mild reaction conditions, relatively low energy consumption, environmental friendliness and the like, and provides a feasible chemical technical path for resourceful treatment of the anhydride cured glycidyl ether type epoxy resin waste.