22results about How to "Controllable parameters" patented technology

The invention belongs to the technical field of lithium recovery, and particularly relates to a method for extracting and preparing lithium carbonate from a low-concentration lithium solution, which comprises the following steps: 1) extraction: extracting lithium ions in a water phase by using an extraction organic phase to obtain a loaded organic phase and raffinate; 2) back extraction: back-extracting the loaded organic phase by using a back-extraction water phase, and introducing CO2 gas in the back-extraction process, so that lithium ions are transferred from the loaded organic phase to the back-extraction water phase and are crystallized at the same time, and then carrying out phase separation to obtain a lithium carbonate solid; and 3) post-treatment: washing and drying the lithium carbonate solid to obtain the electronic-grade lithium carbonate ultrafine powder. According to the method, lithium-sodium separation and lithium enrichment are effectively realized by controlling extraction and back extraction conditions, meanwhile, a lithium carbonate preparation process and a back extraction process are synchronously carried out, the grain diameter of lithium carbonate is effectively regulated and controlled, a lithium carbonate product with low impurity content and fine granularity is obtained, the problem that a low-concentration lithium-containing solution is difficult to recover is solved, and the method is suitable for industrial production. The method has the advantages of high efficiency, environmental protection and low cost.

The invention belongs to the technical field of alumina ceramic preparation, and particularly relates to microcrystalline wear-resistant alumina ceramic and a preparation method thereof. The microcrystal wear-resistant aluminum oxide ceramic is prepared from the following raw materials: fused corundum powder, gibbsite, diopside, calcium fluosilicate, neodymium oxide, nickel aluminate, strontium oxide and sodium tripolyphosphate. According to the microcrystal wear-resistant aluminum oxide ceramic disclosed by the invention, the fused corundum powder and the gibbsite are used as main raw materials, so that the mechanical property of the prepared aluminum oxide ceramic is fundamentally ensured; diopside and calcium fluosilicate are used as fluxing agents, so that the firing temperature of the aluminum oxide ceramic is reduced, and the compactness is improved; neodymium trioxide, nickel aluminate and strontium oxide are used as wear-resistant assistants, and the wear resistance of the aluminum oxide ceramic is improved by improving the microstructure of the aluminum oxide ceramic, avoiding stress concentration at a grain boundary and generating a second reinforcement phase under the synergistic effect of the three assistants. Therefore, it is ensured that the prepared aluminum oxide ceramic has excellent wear resistance.

The invention belongs to the technical field of egg product processing, and particularly relates to a preparation method of low-viscosity high-temperature-resistant egg white liquid. According to the preparation method of the high-temperature-resistant egg white liquid, an interaction mode of egg white components is regulated and controlled through ultrasonic / pH cooperative treatment, so that the heat stability of fresh egg white under the heating condition is improved, and then the high-temperature-resistant egg white liquid is obtained. The method comprises the following steps: carrying out shell-egg separation on an egg to obtain a fresh egg white liquid; treating the fresh egg white liquid by using an ultrasonic pulverizer; adjusting the pH value to 10.6; packaging to obtain a finished product. The finally prepared low-viscosity high-temperature-resistant egg white liquid is still kept in a flowing state after being heated for 5 minutes at 72 DEG C, the turbidity is reduced from 1.87 to 0.38, the protein concentration is increased from 28.9 mg / mL to 96.74 mg / mL, and the gel point is increased from 63 DEG C to 76.5 DEG C. According to the preparation method of the low-viscosity high-temperature-resistant egg white liquid, a theoretical basis is provided for improving the processing applicability of egg white raw materials in downstream industries, and a technical support is provided for development of low-viscosity high-temperature-resistant egg white ingredients.

The invention provides a method for preparing white carbon black from coal gangue kaolin, relates to the technical field of inorganic non-metallic material preparation, and aims to solve the problems of pollution caused by stockpiling of coal gangue kaolin, low resource utilization rate and non-systematic separation of silicon and aluminum. And an integrated technical system of waste recycling, precise roasting, efficient silicon-aluminum separation and double-product synergistic preparation is innovatively constructed. According to the method, coal gangue kaolin is taken as a raw material, efficient separation of silicon and aluminum is realized through the steps of crushing, temperature-controlled roasting, hydrochloric acid leaching, solid-liquid separation, washing dehydration, high-temperature calcination and the like, white carbon black is prepared from a solid phase, and aluminum chloride crystal is recovered from a liquid phase and roasted to obtain aluminum oxide. The core innovation lies in precise control of a roasting phase, optimization of a silicon-aluminum directional separation process and adaptation of white carbon black roasting parameters. The method not only reduces environmental pollution, but also creates remarkable economic value, and the process is simple, easy to industrialize and suitable for large-scale solid waste resource utilization scenes.

The invention discloses bisphenol M cyanate ester and a preparation method thereof, and belongs to the technical field of cyanate ester resin, the bisphenol M cyanate ester comprises the following raw materials by weight: 100 parts of a bisphenol M cyanate resin monomer, 15-20 parts of thermosetting resin, 3-8 parts of modified hydrotalcite, 0.03-0.05 part of a catalyst, and 0.1-0.15 part of an accelerator. The preparation method comprises the following steps: S1, weighing the raw materials in parts by weight, adding the catalyst into the accelerant, and performing high-speed shearing dispersion to obtain dispersion liquid; s2, carrying out heating and stirring reaction on a bisphenol M cyanate monomer, thermosetting resin and the modified hydrotalcite to obtain a bisphenol M cyanate prepolymer; and S3, adding the dispersion liquid in the step S1 into the bisphenol M cyanate prepolymer, and stirring for reaction to obtain the bisphenol M cyanate resin. The bisphenol M cyanate ester resin prepared by the invention is excellent in mechanical property, good in heat resistance, low in moisture absorption rate and stable in size.

The application belongs to the field of sludge recovery, and particularly relates to a method for recovering calcium fluoride from calcium fluoride sludge, wherein the calcium fluoride sludge is pretreated under ultrasonic waves, the power of the ultrasonic waves is above 20 KHz; a flotation reagent is added to the system after ultrasonic treatment for rough selection, and calcium fluoride rough selection material is collected; the flotation reagent comprises an inhibitor and a collector, the collector comprises formula 1 and formula 2 in a weight ratio of 1:1-2, the pH of the slurry in the flotation stage is 3-5.5; the acid for regulating the pH of the slurry is at least one of hydrochloric acid and nitric acid. The application innovatively adopts an ultrasonic process to pretreat the calcium fluoride sludge, and then cooperates with combined collectors in subsequent flotation and joint control of the pH of the flotation process, so that synergy can be achieved, and high-grade calcium fluoride can be efficiently and greenly obtained based on simple processes and means.

The invention discloses a low-carbon concrete nano C-A-S-H seed crystal enhancer as well as a preparation method and application thereof. The reinforcing agent comprises the following raw materials in parts by weight: 150-200 parts of water, 20-25 parts of sodium silicate nonahydrate, 15-20 parts of calcium nitrate tetrahydrate, 5-8 parts of aluminum nitrate nonahydrate, 1-4 parts of a polycarboxylate superplasticizer, 1-4 parts of sodium hydroxide, 0.5-2 parts of a silane coupling agent and 0.5-2 parts of a sodium polyacrylate dispersing agent. The preparation method comprises the steps of dissolution, precipitation reaction, dispersion modification and pH adjustment. According to the invention, by optimizing the molar ratio of silicon to aluminum and constructing a composite dispersion system, the technical problems of easy agglomeration, poor stability and poor compatibility with a water reducing agent of the nano seed crystal are solved. When 0.5-2% of the additive is applied to concrete, the early strength can be remarkably improved, the workability maintenance can be improved, the activity of solid wastes such as fly ash and the like can be effectively excited, and a key technical support is provided for preparing high-performance low-carbon concrete.

This invention discloses a high-strength, high-elongation, low-hardness natural rubber and its preparation method. By weight, the high-strength, high-elongation, low-hardness natural rubber comprises the following components: 100 parts natural rubber, 1.5-3 parts crosslinking agent, 0.8-2 parts accelerator, 10-20 parts reinforcing agent, 5-15 parts softener, 1-3 parts antioxidant, and 3-8 parts activator. The high-strength, high-elongation, low-hardness natural rubber has a tensile strength ≥20 MPa, an elongation ≥700%, and a Shore A hardness of 35-45. Under normal operating conditions of -20℃ to 80℃, the fluctuation range of the tensile strength and elongation is controlled within ±5%, and the Shore A hardness fluctuation is ≤±2. This invention solves the technical problem of achieving a balance between high strength, high elongation, and low hardness in existing natural rubber formulations. The formulation components of this invention are widely available, the preparation process is simple, and the production cost is controllable. It can be widely applied in multiple fields and has extremely high practical value and promising prospects for promotion.

The application relates to the technical field of medicines, and particularly provides a preparation method of lecomycin based on a biosynthesis process. The application first provides a 4''-ketone erythromycin A compound and a recombinant host cell capable of efficiently fermenting the compound. A brand-new semi-chemical synthesis route of lecomycin is designed by taking the key intermediate as a raw material, and the route comprises, in sequence, epoxidation, amination, 6-position oximation, configuration inversion, rearrangement, reduction and ring expansion. The application completely avoids the cumbersome hydroxyl and amino protection and deprotection steps in the prior art, avoids the use of noble metal catalysts, thereby significantly simplifies the process, improves the atomic economy, and the total yield can reach about 32.1%. The application provides a brand-new green synthesis route of lecomycin, which is simple in steps, high in yield, low in cost and easy to industrialize, and meanwhile protects a plurality of novel intermediates in the route.

The application belongs to the technical field of thickening agent preparation, and particularly relates to a preparation method of a polymer thickening agent for fracturing. The preparation method comprises the following steps: preparing a pre-processed methyl methacrylate (triethoxysilyl) methyl ester solution; preparing a pre-processed 2-[[2-(methacryloyloxy)ethyl]dimethylammonium] acetate solution; preparing an aqueous phase; and preparing the polymer thickening agent for fracturing. The preparation method of the polymer thickening agent for fracturing comprises the following steps: taking acrylamide as a main monomer, taking maleic acid mono[2(1-oxo-2-propenyl)oxyethyl] ester, methyl methacrylate (triethoxysilyl) methyl ester and 2-[[2-(methacryloyloxy)ethyl]dimethylammonium] acetate as functional monomers, taking an oxidation-reduction initiator combined with an azo initiator as an initiator system, and realizing multi-monomer copolymerization through gradient temperature polymerization to prepare the polymer thickening agent for fracturing which has temperature resistance and salt resistance.

The invention belongs to the technical field of polyurethane heat insulation materials, and particularly relates to a polyurethane heat insulation material for geothermal well oil pipes and a preparation method of the polyurethane heat insulation material. According to the polyurethane heat insulation and heat preservation material for the geothermal well oil pipe, polyester polyol and polyether polyol are mixed and react with 4, 4 '-dicyclohexylmethane diisocyanate, the mechanical property of the prepared polyurethane material is fundamentally guaranteed, meanwhile, 2, 4-diamino-3, 5-dimethylthiotoluene and 1, 4-butane diamine are added, and the polyurethane heat insulation and heat preservation material for the geothermal well oil pipe has the advantages that the mechanical property of the polyurethane material is greatly improved; the modified palygorskite, the phenolic aldehyde hollow microspheres and the polyacrylonitrile pre-oxidized fibers are used as fillers to be added, so that the heat insulation performance of the prepared polyurethane material is ensured, and the raw materials have a synergistic effect, so that the heat insulation performance of the polyurethane material is improved, and the heat insulation performance of the polyurethane material is improved. The mechanical property and the thermal insulation property of the prepared polyurethane material are ensured.

The present invention relates to an external preparation of an anthelmintic Vernonia extract and a preparation method thereof. The method uses the anthelmintic Vernonia extract as a raw material drug to prepare an external preparation of a gel and a microemulsion gel. The gel and microemulsion gel obtained by the method of the present invention have uniform appearance and stable physical and chemical properties, and the content of the main components, Vernonia oleracea and 3,5-dicaffeoylquinic acid, is stable as determined by HPLC; and the intradermal retention and cumulative transdermal amount of the main components of the external preparations such as the prepared gel and microemulsion gel are evaluated through a transdermal test, and it is determined that the microemulsion gel has a higher intradermal retention capacity and is very suitable for topical administration treatment. The present invention uses Vernonia oleracea and 3,5-O-dicaffeoylquinic acid as the main components of the preparation for the first time, and prepares an external preparation with uniform appearance and stable content.

The invention relates to the technical field of pipeline steel, in particular to a low-cost thick-specification high-toughness pipeline steel hot-rolled coil and a manufacturing method thereof, and the low-cost thick-specification high-toughness pipeline steel hot-rolled coil comprises the following chemical components in percentage by mass: 0.05%-0.07% of C, 0.15%-0.25% of Si, 1.55%-1.70% of Mn, less than or equal to 0.01% of P, less than or equal to 0.001% of S, 0.05%-0.06% of Nb, 0.02%-0.03% of V, 0.01%-0.02% of Ti, 0.18%-0.28% of Cr, 0.02%-0.05% of Al, less than or equal to 0.0040% of N, less than or equal to 0.02% of Mo, less than or equal to 0.02% of Ni and the balance of Fe and inevitable impurities. The manufacturing method comprises the procedures of steelmaking, continuous casting, heating, rough rolling, finish rolling, cooling and coiling. The pipeline steel hot-rolled coil is suitable for high-efficiency manufacturing of the thick-wall large-diameter high-grade spiral welded pipe for oil and gas transmission.

The present invention relates to the field of alcohol amine decarbonization, and discloses a method for desorbing CO2 by using an electric field to assist alcohol amine. The method comprises the following steps: (1) contacting and mixing an alcohol amine absorbent with CO2 to obtain a rich liquid; (2) applying an external electric field to the rich liquid at a first preset temperature, and performing a desorption treatment at a second preset temperature to obtain a product CO2 gas and a regenerated alcohol amine absorbent; wherein the second preset temperature is 2-5°C lower than the first preset temperature; and the reaction voltage of the external electric field is 3-6V. The present invention provides a method for desorbing CO2 by using an electric field to assist alcohol amine, wherein an electric field is added to assist in enhanced desorption during the desorption process, and compared with a traditional heating desorption device, the method has the advantages of faster desorption rate, higher desorption efficiency, lower energy consumption, etc., and has simple steps, low cost, easy control of parameters, and obvious economic benefits.

The present application provides a filter based on an optical superlattice electro-optical long-period grating and a preparation method. Through the coupling between the fundamental mode and the leakage mode, narrowband filtering of the communication band is realized, which can be applied to the field of optical communication and optical waveguide devices. The filter includes: a substrate, a buried insulating layer, a thin film layer, a periodically polarized superlattice waveguide, and a flat electrode; the substrate, the buried insulating layer and the thin film layer of the photonic chip are bonded in sequence through a wafer bonding process, and a thin film for preparing a waveguide is bonded to the substrate and the buried insulating layer. The waveguide is engraved on the upper surface of the film by photolithography technology, and a periodically polarized superlattice is formed on the waveguide by polarization technology, and metal flat electrodes are covered on the flat plates on both sides of the waveguide to realize the function of an adjustable electro-optical grating. The filter based on the optical superlattice electro-optical long-period grating of the present application does not require strict process equipment and conditions, has a simple structure, reduces the difficulty of device manufacturing, has low equipment requirements, large process tolerance, and easy parameter control.

The invention discloses a preparation method and application of alkylphenol derivatives in syzygium jambos, and relates to the technical field of natural product extraction. S2, liquid-liquid distribution and enrichment; s3, carrying out primary column chromatography separation; s4, performing multistage column chromatography purification; s5, refining and enriching; s6, characterization verification is carried out; the product provided by the invention is clear in lipid-lowering activity and outstanding in application potential, the obtained alkylphenol derivative plays a role in regulating lipid metabolism by activating an AMPK / PPARalpha signal channel, is good in bioavailability, can be effectively absorbed by an organism and distributed to a target action site, and is derived from natural edible fruits, so that the safety is better guaranteed, and the alkylphenol derivative can be widely applied to the field of pharmaceutical preparations. High-quality and reliable active raw materials are provided for research and development of related functional foods, nutritional health-care products and medicines for regulating blood fat, and the deep processing application field of the syzygium jambos fruits is widened.

The invention discloses a process for efficiently extracting anticancer components from citrus peels, and aims to solve the problems that the characteristics of the citrus peels temporarily stored at low temperature are not adapted, the extraction efficiency is low, the product purity is insufficient and the process is disjointed with industrial production in the prior art. The process comprises the following steps: taking citrus peel which is temporarily stored at 2-8 DEG C for 3-15 days, cleaning and crushing, adding a composite extracting solution containing modified pectinase, a tea polyphenol-beta-cyclodextrin inclusion compound, N-acetyl glucosamine, xylooligosaccharide and the like, and carrying out ultrasonic assistance-oscillation synergistic extraction at 45-55 DEG C; centrifuging and filtering after extraction, adding a chitosan-montmorillonite composite adsorbent for purification, passing through macroporous resin, eluting by adopting an ethanol-citric acid composite eluent, and concentrating and drying to obtain the anticancer component. According to the method, efficient cracking and anti-isomerization of the compound are achieved through component synergism, the extraction rate of the anti-cancer component and the purity of the product are improved, the process operation is simple, the method is suitable for industrial production, and high-valued utilization of low-temperature temporary storage citrus peel by-products can be promoted.

This invention discloses a polypropylene carbonate composite material modified with tea seed cake and its preparation method. The polypropylene carbonate composite material comprises modified tea seed cake and a polypropylene carbonate matrix, wherein the modified tea seed cake is obtained through surface modification via alkali treatment, silane coupling agent treatment, or organic acid treatment. This invention significantly improves the dispersibility and interfacial compatibility of tea seed cake, a natural biomass filler, within the polypropylene carbonate matrix by employing specific surface treatment methods. Simultaneously, by utilizing the active components of tea seed cake itself, a polypropylene carbonate composite material with significantly improved mechanical properties, thermal stability, anti-aging properties, and biodegradability is prepared, achieving high-value utilization of agricultural waste.

The invention discloses high-performance leather based on bio-based raw materials and a preparation method of the high-performance leather, and belongs to the technical field of leather. The leather is of a three-layer functional gradient structure and sequentially comprises the following components from bottom to top: a bottom layer which is formed by catalyzing and crosslinking a thermoplastic starch matrix, vegetable tannin and activated keratin through laccase; the middle foaming layer is formed by hot-pressing and foaming a thermoplastic starch matrix, sodium bicarbonate and citric acid; the surface layer is formed by catalytic crosslinking of a thermoplastic starch matrix, cane sugar and nano-crystalline cellulose through oxidase. The preparation method comprises the following steps: respectively preparing the bottom layer slurry, the middle layer slurry and the surface layer slurry, and carrying out semi-dry method compounding and integrated hot press molding. The raw materials are all renewable bio-based components, and the preparation process is green and environment-friendly; the prepared leather has high tensile strength, excellent wear resistance and water resistance, tight interlayer combination, good softness and buffering performance and excellent comprehensive performance, can be widely applied to the fields of shoe materials, bags and suitcases and the like, and has a good industrialization prospect.

This invention discloses a method for rapidly oxidizing Spiro-OMeTAD with oxygen plasma to improve the efficiency of solar cells, belonging to the field of perovskite solar cell device technology. This invention involves treating the hole transport layer Spiro-OMeTAD with low-power oxygen plasma under substrate heating conditions, enabling rapid and uniform oxidation within a short time. This significantly improves the conductivity and carrier mobility of the thin film, while drastically reducing the exposure time of the film to air and minimizing moisture and Li₂ residues. + The interaction of ions reduces the damage of moisture to the thin film. The oxygen plasma rapid oxidation scheme of this invention not only effectively optimizes the electrical performance of the hole transport layer, but also simplifies the fabrication process and improves device consistency, laying a solid material foundation for the further fabrication of high-quality, high-stability perovskite solar cell devices.

The present invention belongs to the technical field of oilfield produced water treatment agents, and specifically relates to an oilfield produced water treatment agent and a preparation method thereof. The oilfield produced water treatment agent is composed of the following raw materials in parts by weight: polysilicate ferric sulfate aluminum modified vermiculite, diethyltriamine penta-methylenephosphonic acid, sulfonated succinic acid di-2-ethylhexyl sodium salt, 1,1,1-trimethylolpropane polyoxyethylene polyoxypropylene ether, N,N,N',N'-tetraphenyl-1,4-phenylenediamine, lauric acid imidazoline quaternary ammonium salt, phosphono-succinic acid, polypropylene glycol monostearate, tetrahydroxymethyl sulfate phosphorus. The oilfield produced water treatment agent prepared by the preparation method of the present invention has excellent oil removal rate, suspended solid removal rate, COD removal rate and scale inhibition rate, and has a lower corrosion rate; when it is used for reinjection, it has good compatibility with formation water, and formation blockage does not occur.

The invention discloses a preparation method of a palladium quantum dot loaded barium titanate composite material. The piezoelectric catalytic performance is improved through morphology regulation and interface engineering cooperation. The BTO nanowire is converted from a cubic phase to a strong ferroelectric tetragonal phase by adopting an electrostatic spinning technology and cooperating with a 700 DEG C precise annealing strategy, so that the built-in electric field and piezoelectric response are enhanced, the brittle fracture of the nanowire caused by high temperature is avoided, and the integrity and flexibility of a one-dimensional structure are guaranteed. In the active site loading stage, a synchronous process of ultrasonic dispersion and violent stirring in an ice bath environment is adopted, local concentration polarization is eliminated, nanowire agglomeration is disassembled, and palladium quantum dots are driven to uniformly form a Pd (111) / BTO (110) epitaxial matching heterojunction in situ on a BTO (110) crystal face. According to the high-quality Schottky interface, the charge transfer efficiency is enhanced, the catalytic reduction kinetics is improved, and the hydrogen evolution rate reaches 3464.28 [mu] molgh and is increased by 2.8 times compared with pure BTO under the condition that only 0.75 wt.% of palladium is loaded. Technological parameters are easy to control, the cost is low, and a feasible technical scheme is provided for industrialization of piezoelectric catalytic hydrogen production.