958 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 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 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 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 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 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 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 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 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 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 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 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 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.

The invention belongs to the technical field of oilfield chemistry, relates to a thickening agent for a high-temperature-resistant salt-resistant fracturing fluid and a preparation method of the thickening agent, and particularly relates to a thickening agent for a hydrophobic association type fracturing fluid and a preparation method of the thickening agent. The thickening agent for the hydrophobic association type fracturing fluid provided by the invention is prepared by polymerizing the following monomer raw materials: an amide monomer, a carboxylic group-containing monomer, a sulfonic acid monomer and a hydrophobic association monomer. According to the thickening agent for the hydrophobic association type fracturing fluid, a functional group and a hydrophobic group are introduced through molecular design, the thickening agent and an organic zirconium cross-linking agent construct a thermal stable cross-linked network, the temperature resistance and the shear resistance at 150-200 DEG C are higher than those required by a water-based fracturing technology (larger than 50 mPa.s), and the fracturing requirements of deep reservoirs are met.

The invention discloses 5-hydroxymethylfurfural and a preparation method thereof, and belongs to the technical field of chemical engineering. The preparation method comprises the following steps: reacting a homogeneous aqueous solution containing fructose, inorganic salt and an acid catalyst in a multi-kettle series reactor to obtain the 5-hydroxymethylfurfural, the inorganic salt is selected from at least one of halogen compounds, borides, silicate, aluminate, phosphate and borate; the acidic catalyst comprises at least one of water-soluble acids. The specific inorganic salt and the specific acid catalyst are added and can play a synergistic role, the reaction is carried out under multi-kettle series connection, the backmixing degree of the reaction materials in the reactor is maximized, side reactions can be effectively controlled, black rot is avoided, the reaction production efficiency and conversion rate are effectively improved, the reaction selectivity is improved, and the method is suitable for industrial production. And the equipment maintenance and labor cost is greatly reduced.

The invention relates to the technical field of biochemistry, in particular to an enzyme mutant and application thereof in preparation of conopeptide. According to the preparation method, a strategy of combining green chemistry and an enzyme method is adopted, seven tripeptide fragments are taken as raw materials, a conopeptide main chain is prepared through a liquid-phase synthesis method, and then enzymatic precise modification and synthesis are realized by utilizing a multiple directed evolution enzyme concerted catalysis system. Based on the efficient connection characteristic of a liquid-phase synthesis system and the high substrate specificity of an enzymatic system, the complex protection group operation in traditional solid-phase synthesis is effectively avoided, generation of by-products is remarkably reduced, meanwhile, fixed-point modification and precise assembly of a conopeptide main chain are achieved, and the application prospect is wide. And an efficient and green new path is provided for the continuous production of the cosmetic-grade high-purity conopeptide.

The invention discloses a kind of silicon / carbon-based nano chemical empowered polymer viscosity reducer and preparation method thereof, relate to oilfield chemical technology field.The preparation method of the viscosity reducer of the present invention is:Nano silicon dioxide or carbon quantum dot are modified using a silane coupling agent with a double bond, N hydroxymethyl acrylamide, 2 acrylamido 2 methylpropane sulfonic acid, α olefin sulfonate sodium monomer and modified nano silicon dioxide or modified carbon quantum dot are sequentially added in deionized water afterwards, peroxide is used as initiator, polymer chain is grafted onto hydrophobic nano silicon dioxide or modified carbon quantum dot by free radical copolymerization in aqueous solution, obtain target product.The viscosity reducer of the present invention has excellent long-term stability and shear resistance under the conditions of high temperature (130 DEG C) high salt (mineralization 250,000 mg / L), can significantly reduce crude oil viscosity 90% and above in underground conditions, while it can reduce oil-water interfacial tension, improve oil displacement efficiency, thus significantly increase crude oil recovery rate.

The invention relates to a loop fixed bed reactor system, and relates to the technical field of chemical engineering, the loop fixed bed reactor system comprises a plurality of groups of primary loop reactors and a plurality of groups of secondary loop reactors, the primary loop reactors and the secondary loop reactors have the same structure, and the primary loop reactors and the secondary loop reactors are connected in series through reactor outlet pipelines; each primary loop reactor comprises a fixed bed reaction unit, a circulating pump and an external heat exchanger, the fixed bed reaction unit, the circulating pump, the external heat exchanger, an external heat exchanger inlet pipeline and the circulating pipeline assembly are communicated, and two or more groups of primary loop reactors and secondary loop reactors are connected in series through reactor outlet pipelines; through a forced circulation flow mechanism driven by the venturi gas-liquid mixer and the circulating pump, the problems of mixing mass transfer efficiency, internal heat transfer and retention time of a traditional fixed bed reactor are fundamentally solved, and exponential improvement of the mixing effect and the heat transfer effect is achieved through rapid circulation of the circulating pump and the venturi gas-liquid mixer.

The invention relates to the technical field of oilfield chemistry, in particular to a clay stabilizer containing dihydroxyl quaternary ammonium salt and a preparation method thereof, and the preparation method of the clay stabilizer containing dihydroxyl quaternary ammonium salt comprises the following steps: mixing required amounts of tetramethylethylenediamine, 3-chloro-2-hydroxypropyl trimethyl ammonium chloride and a hydrogen bond donor for reaction to obtain the clay stabilizer containing dihydroxyl quaternary ammonium salt. And after the reaction is ended, obtaining the clay stabilizer containing the dihydroxyl quaternary ammonium salt. The clay stabilizer containing dihydroxyl quaternary ammonium salt is high in charge density and remarkable in clay expansion prevention effect; the fabric has the characteristic of multi-point adsorption and is high in washing resistance; the polymer is composed of small molecular weight compounds and can be used for transformation of low-permeability and ultra-low-permeability reservoirs. And meanwhile, the fracturing fluid has good compatibility with the fracturing fluid, the influence on the viscosity of the fracturing fluid is small, and the sand-carrying performance of the fracturing fluid can be guaranteed while reservoir protection is realized. The preparation method of the clay stabilizer containing the dihydroxyl quaternary ammonium salt is simple in process, easy to control and implement and suitable for industrial large-scale production.

A metrological device (10) configured to generate at least one energetic / electrochemical parameter from measurement data based on bioelectrochemical processes, comprising at least one metrological microbial electrochemical technology unit (11) with a cathodic region (11.1) sealed off from the fluid to be examined, and comprising a logic unit (16) with at least one microcontroller (16.1) configured to process measurement data collected over an evaluation period, wherein the metrological device (10) is configured to correlate at least one measured value with at least one process parameter (P SB ) based on the processed measurement data, in particular with a process parameter (P SB) for the chemical / biological oxygen demand (COD / BOD) and / or for a carbon consumption rate and / or for substance fractions of volatile fatty acids; characterized in that the measuring device (10) has at least one active ceramic (12.2) arranged between the cathodic region (11.1) and the fluid to be examined as a component of the metrological microbial electrochemical technology unit (11), which separates the cathodic region (11.1) from the fluid to be examined, wherein the measuring device (10) is configured by means of the at least one ceramic (12.2) to generate the at least one energetic / electrochemical parameter from measurement data collected over an evaluation period of at least 30 days, in particular measurement data from cell-internal resistance components and / or voltage, capacitance, current, power, and / or electrical charge measurement data.

The invention belongs to the technical field of chemistry, and particularly relates to a domestic nuclear-grade resin in-pile irradiation application index evaluation method. Comprising the following steps: confirming that pressure-resistant, temperature-resistant and oxidation-resistant tests have been carried out before domestic nuclear-grade resin enters a pile, and the test result is not lower than the index requirements of imported same-type resin; determining test preconditions, collecting water quality data at the inlet and outlet of the domestic nuclear-grade resin in-pile irradiation application test desalting bed during normal power operation, and determining corresponding resin bed operation parameters, unit operation states and resin replacement window time; desalting bed operation parameters and unit operation states in the domestic resin engineering application period are collected, and the water quality of a resin bed inlet and outlet and a connected system is regularly tracked according to a water quality sampling analysis scheme; after the test is finished, carrying out broken resin inspection on the resin trapper or the filter; and organizing related operation parameters and water quality indexes for comparative analysis. The invention provides a basis and a standard for the application of the domestic nuclear-grade resin in the nuclear power plant.

The invention discloses a silicon / carbon-based nano chemically-energized polymer viscosity reducer and a preparation method thereof, and relates to the technical field of oilfield chemistry. The preparation method of the viscosity reducer comprises the following steps: modifying nano silicon dioxide or carbon quantum dots by using a silane coupling agent with double bonds, then sequentially adding N-hydroxymethyl acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, a sodium alpha-olefin sulfonate monomer and the modified nano silicon dioxide or the modified carbon quantum dots into deionized water, and uniformly stirring to obtain the viscosity reducer. A peroxide is used as an initiator, and a polymer chain is grafted to the hydrophobic nano silicon dioxide or the modified carbon quantum dots through a free radical copolymerization reaction in an aqueous solution to obtain a target product. The viscosity reducer disclosed by the invention has excellent long-term stability and shear resistance under the conditions of high temperature (130 DEG C) and high salinity (the degree of mineralization is 250,000 mg / L), can greatly reduce the viscosity of crude oil by 90% or more under the underground condition, and can reduce the oil-water interfacial tension and improve the oil displacement efficiency, thereby greatly improving the recovery rate of the crude oil.

The utility model relates to the technical field of oilfield chemistry, and particularly discloses an oilfield chemistry additive storage device which comprises a chemical storage barrel, a connecting pipe is fixedly connected to the top of the chemical storage barrel, sliding grooves are formed in the two sides of the interior of the chemical storage barrel, and a protection assembly is slidably connected to the interior of the chemical storage barrel. The protection assembly comprises a protection plate slidably connected into the chemical storage barrel, and sliding plates are fixedly connected to the left side and the right side of the protection plate. By arranging the sliding plates and the clamping blocks, the effect of adjusting and fixing the protection plates at different positions is achieved, adjustment is conducted according to chemical additives at different heights, the effect of protecting the tops of the chemical additives is achieved, and the situation that the chemical agents react due to shaking of the chemical agents is avoided; and meanwhile, the protection effect on the bottom of the protection plate is facilitated, the inhibition on the chemical agent is improved, and the service life of the protection plate is prolonged.

The invention relates to the technical field of daily chemicals, in particular to a soothing composition as well as a preparation method and application thereof. The composition is prepared from saccharomycetes fermentation lysate filtrate, peony root extract, spanishneedles herb extract, liquorice root extract, glycerol and tremella fuciformis extract. Small molecule peptides in the fermentation lysate and flavone, polyphenol and triterpenoid components in the plant extract can inhibit inflammation pathways (such as TNF-alpha, IL-6 and COX-2) in a multi-target mode, and skin redness is effectively relieved. The skin barrier repairing capability is high: the tremella acidic polysaccharide and the yeast polypeptide form a synergistic network, so that the water content of a cuticle is favorably enhanced, and barrier lipid synthesis is promoted; a polysaccharide-polypeptide cross-linked chain structure is broken through a high-shear homogenizing treatment technology, so that the wiredrawing and colloid decorous feeling of a finished product are remarkably reduced, and a refreshing skin feeling is obtained.

The invention relates to the technical field of daily chemicals, in particular to an anti-hair-loss composition, application and anti-hair-loss shampoo. The anti-hair loss composition is prepared from a cacumen biotae extract, cyclodextrin and maltodextrin. The anti-hair loss shampoo comprises a solvent, a surfactant, a hair conditioner, a humectant, a chelating agent and an anti-dandruff agent. A plurality of anti-hair-loss and hair-growing functional components such as the cacumen biotae extract and the ginseng root extract are jointly used in the formula and respectively act on different physiological links of hair follicles, such as improvement of microcirculation, activation of hair papilla cells, inhibition of 5alpha-reductase activity, delaying of hair follicle degeneration and the like; and a triple anti-hair loss path of nutrition supply, metabolic regulation and micro-inflammation relief is constructed, so that the synergistic promotion of hair loss prevention and hair growth is realized.

The invention discloses a high-salinity wastewater resource utilization method and device, belongs to the technical field of chemical engineering, and relates to wastewater treatment. The invention relates to a high-salinity wastewater resource utilization method which comprises the following steps: (1) deep removal of organic matters in a high-salinity system: realizing selective separation and removal of the organic matters in wastewater by using a synergistic effect of a flocculating agent and a catalyst; (2) mixed salt separation and recycling: realizing stable separation of sodium chloride and sodium sulfate through the design of MCR-nanofiltration-reverse osmosis multi-membrane coupling synergistic gradient coupling and reflux nesting; and (3) stable control of evaporative crystallization of a complex system: a scale inhibitor, humic acid and a defoaming agent are used, and fractional crystallization and purification are realized through high-temperature firing. According to the method, recycling circulating water can be saved, a large amount of sodium chloride and sodium sulfate are recycled as byproducts, COD and ammonia nitrogen are reduced, the recycling rate of sodium sulfate and sodium chloride is larger than 85%, and the water recycling rate is larger than 95%.

This invention belongs to the field of chemical technology and discloses a high-toughness, fracture-resistant foamed composite mat and its processing technology. The high-toughness, fracture-resistant foamed composite mat and its processing technology include a mat body with a thickness of 3-15 mm, comprising two or more soft elastic foam layers; at least one reinforcing layer is disposed between adjacent soft elastic foam layers. This high-toughness, fracture-resistant foamed composite mat and its processing technology solve the core problems of insufficient toughness and easy breakage when bent in existing PU foamed yoga mats, crawling mats, and other similar products: through the structure of the PU foam layer and the reinforcing layer interlaced, the excellent toughness and tensile strength of the reinforcing layer are utilized to disperse the stress generated when the yoga mat is bent, avoiding cracking and breakage of the PU foam layer due to stress concentration, thus solving the problems mentioned in the background art.

This invention discloses a controlled-release solid film formulation for pesticides, its preparation method, and its applications. This invention upgrades pesticides from liquid / powder formulations to solid film formulations, utilizing the solid film to physically block pesticide drift, diffusion, and loss, reducing off-target effects at the source. Through the combined use of physical and chemical techniques, pesticides are uniformly distributed within the solid film, and the pesticide release cycle is synchronized with the solid film degradation, achieving precise controlled release. This solid film formulation is applied from the beginning of crop growth, synchronized with the plant growth cycle, providing early preventative effects through quantitative controlled release of pesticides. This solid film formulation also functions as a mulch film; its preparation process is simple and easy, it is completely degradable and requires no recycling, reducing costs. The identification method of this invention utilizes selective precipitation separation technology, achieving high pesticide extraction efficiency of 95%-98%, especially suitable for low water-soluble pesticides. The drug identification process is simple to operate: the entire process takes less than 4 hours, requires no complex purification steps, and is suitable for batch sample processing.