64 results about "Diethylene triamine" patented technology

The invention discloses a functional fracturing fluid directly prepared from flow-back fluid of complex water quality. The fracturing fluid is prepared by directly adding a salt-tolerant polymer and an ion trapping agent into the flow-back fluid. The addition amount of the salt-tolerant polymer accounts for 0.15-0.3% of the total mass of the fracturing fluid, and the addition amount of the ion trapping agent is 100-500ppm. The salt-tolerant polymer is prepared by copolymerization of acrylamide, a salt-tolerant monomer and an allyl quinoline monomer, and the molecular weight of the polymer is 4-15 million. The salt-tolerant monomer is acrylamide polyoxyethylene sodium benzenesulfonate or acrylamide sodium sulfonate. The ion trapping agent is prepared from amino trimethylene phosphonic acid, diethylene triamine penta (methylene phosphonic acid), ethylene glycol bis (2-aminoethyl ether) tetraacetic acid, p-methylphenyl diethanol amine, 2, 3-epoxypropyl trimethyl ammonium chloride, fatty alcohol-polyoxyethylene ether, citric acid and tetrahydrofurfuryl acrylate. The fracturing fluid can be directly prepared from the flow-back fluid, the flow-back fluid does not need to be pretreated, and repeated utilization of the fracturing flow-back fluid is achieved.

The invention discloses a carbon quantum dot loaded diatom electrocatalyst and a preparation method and application thereof. The preparation method comprises the following steps: dissolving and mixing diethylene triamine pentaacetic acid and salt of metal M1 in water, and performing reflux reaction to obtain a complex solution of the metal M1; adding salt of metal M2 for reflux reaction, filtering after the reaction is finished, and removing a solvent from filtrate to obtain a solid complex of bimetals M1 and M2; drying and calcining to obtain a diatomic electrocatalyst precursor; and carrying out post-treatment and freeze-drying to obtain the diatomic electrocatalyst. The carbon quantum dot loaded bimetallic atom site catalyst is obtained by a preparation strategy of coupling molecular design and quantum dot confinement, and is used for research on deep reduction of carbon dioxide into methane through electro-catalysis. The obtained catalyst has excellent methane production activity on an electro-catalysis carbon dioxide reduction reaction under an alkaline condition and a flow cell configuration, and still has relatively good stability under long-term work.

The invention relates to the technical field of OLED (Organic Light Emitting Diode) manufacturing process etching processes, in particular to a silver etching solution for an OLED manufacturing process as well as a preparation method and application of the silver etching solution. The silver etching liquid comprises nitric acid, phosphoric acid, a buffer agent, a metal ion chelating agent and an ionic liquid inhibitor, the ionic liquid inhibitor comprises 1-butyl-3-methylimidazole phosphate, the metal ion chelating agent is selected from at least one of pyromellitic acid, diethylenetriamine pentaacetic acid and ethylenediamine tetramethylene phosphoric acid, and the buffer agent is selected from at least one of sodium chloride, sodium chloride and sodium chloride. The buffering agent comprises acetic acid, and all the components are prepared according to a specific mass ratio. The etching solution can balance the etching rate of silver and indium tin oxide, avoid silver residues and black spot defects, prolong the service life of the solution, reduce the use of a volatile buffer agent, adapt to the OLED fine manufacturing process, improve the product yield and reduce the production cost, and is suitable for etching of a metal substrate in the OLED manufacturing process.

The invention relates to a selective nanofiltration membrane as well as a preparation method and application thereof. The selective nanofiltration membrane comprises a support layer and a separation layer, the separation layer is obtained through interfacial polymerization of an oil-phase reactant and a water-phase reactant; the water-phase reactant comprises a negatively charged monomer and a positively charged monomer; the positively charged monomer comprises any one or a combination of at least two of polyvinylamine, polyethyleneimine, diethylenetriamine, water-soluble chitosan, quaternized polyethyleneimine, polyallylamine or triethylene tetramine. According to the method, monomers with different charges are added into a water phase, so that the nanofiltration membrane is wholly charged and neutral, the interception of sodium sulfate can be effectively reduced, the interception of antibiotics is increased, and the separation of the antibiotics and inorganic salts can be efficiently promoted.

The invention belongs to the technical field of compositions for treating wells, and particularly relates to a sulfur dissolving agent for a sulfur-containing gas well. The sulfur dissolving agent consists of the following components in percentage by mass: 30-35% of sodium hydroxide, 2-3% of a dispersion penetrant, 3-6% of a physical sulfur dissolving agent, 2-5% of a catalyst and the balance of water, and the physical sulfur dissolving agent is selected from two or more of polypropylene imine, N-methyl pyrrolidone, triethylene tetramine, diethylenetriamine and methylbenzene. The catalyst is selected from one or more of ethylene glycol, terephthalic acid and sodium p-toluenesulfonate. According to the sulfur dissolving agent, physical sulfur dissolving agents are compounded, on the basis of the polarity similar dissolvability principle and the synergistic effect of the compounded physical sulfur dissolving agents, sulfur can be dissolved in the sulfur dissolving agent more easily, the starting temperature of sulfur dissolving is reduced by introducing a catalyst, and the dissolving performance of the sulfur dissolving agent to sulfur at the normal temperature is improved; and moreover, the heating process can be reduced, the construction cost is saved, and the method can be widely used for removing sulfur deposition blockage of a high-sulfur-content gas well shaft, a ground pipeline, a valve, a screen and the like.

The present application relates to a kind of carbon dioxide mineralization method and carbon dioxide mineralization device.The carbon dioxide mineralization method includes the following steps: mixing absorption liquid and industrial solid waste at room temperature, obtain mortar;Make mortar solid-liquid separation, obtain clear liquid and thick slurry;Carbon dioxide in flue gas is absorbed by clear liquid, obtain carbon-rich absorption liquid;Carbon-rich absorption liquid and thick slurry occur mineralization reaction at 180 DEG C-220 DEG C, obtain mineralized slurry;Make mineralized slurry solid-liquid separation, obtain mineralized ash and mineralized clear liquid;Wherein, absorption liquid includes inorganic base and organic base, organic base includes monoethanolamine, diethanolamine, triethanolamine, 3-methylaminopropylamine, N-methyl diethanolamine, piperazine, diethylene triamine, triethylene tetramine, tetraethylene pentamine and 2-amino-2-methyl-1-propanolamine at least two kinds.The method greatly improves CO2 capture rate and CO2 utilization rate, and organic base consumption is less, absorption liquid regeneration energy consumption is low, and overall economy is good.

The application discloses an oil and gas field polymer solution viscosity protection system with improved ferrous ion tolerance, and belongs to the technical field of oil and gas field chemicals.The system comprises the following components in mass percentage: 5-10% of a ferrous ion stabilizer, 10-20% of a free radical capturing agent, 10-20% of a structure reinforcing agent, 5-10% of a synergist, and the balance of water; the ferrous ion stabilizer is at least one selected from sodium gluconate, potassium gluconate, diethylene triamine pentaacetic acid and hydroxyethylidene diphosphonic acid; the free radical capturing agent is a compound containing phenolic hydroxyl; the structure reinforcing agent is an imidazoline compound; and the synergist is an aldehyde compound.The application method of the viscosity protection system is as follows: the viscosity protection system is first added into liquid water, polymer powder is then added, a gel breaker is further added, and stirring is uniformly performed to obtain a polymer solution.The viscosity protection system significantly reduces the influence of ferrous ions on the viscosity of the polymer solution, and improves the application effect of polyacrylamide substances in the field of oil and gas fields.

The invention discloses an in-situ leaching liquid injection system and method for high-altitude ionic rare earth ore, and belongs to the field of rare earth hydrometallurgy. The system is composed of a liquid injection well pattern, a layered liquid injection device, a first liquid supply system, a second liquid supply system and a collection system. Exploring the thickness of an ore body weathering crust and vertical distribution of rare earth / impurities; the liquid injection hole is vertically divided into an upper layer liquid injection area (1 / 3-1 / 2 of the upper part) and a lower layer liquid injection area (1 / 2-2 / 3 of the lower part); a 1.0-1.4 wt% low-concentration diethylenetriamine-ammonium acetate composite leaching agent is injected into the upper layer, and co-leaching of impurities such as aluminum and iron is reduced; 1.5-2.5 wt% of high-concentration diethylenetriamine-ammonium acetate composite leaching agent is injected into the lower layer to ensure efficient leaching of rare earth; and rare earth-rich leaching liquid is collected. Compared with a traditional full-layer high-concentration process, the method has the advantages that the use amount of a leaching agent is reduced by 20-40% while the rare earth leaching rate is kept to be larger than or equal to 90%, the aluminum ion concentration of the leachate is reduced by 30-60%, the agent cost and the follow-up impurity removal load are remarkably reduced, and the method is particularly suitable for the high-altitude, low-temperature, low-air-pressure and thick-weathered crust environment.

The application provides an anti-carbon dioxide corrosion inhibitor, a preparation method and application thereof, and relates to the technical field of oil and gas field corrosion protection. The application provides an inhibitor, raw materials of which include alpha-lipoic acid, diethylene triamine, formaldehyde, 2-naphthyl ethyl ketone and benzyl chloride in a molar ratio of 1.0-1.2:0.8-1.2:1.2-2.0:1.0-1.4:1.0-1.4. The application also provides a preparation method, raw materials are taken according to the molar ratio, alpha-lipoic acid and diethylene triamine are mixed to obtain a first product through reaction; formaldehyde and 2-naphthyl ethyl ketone are mixed with the first product to obtain a second product through reaction; benzyl chloride and the second product are mixed to obtain a finished product inhibitor through reaction. The application also provides application of the inhibitor in preventing carbon dioxide corrosion. The inhibitor has good corrosion inhibition effect, a simple preparation method, a stable structure, and still has superior corrosion inhibition effect in a high salinity environment.

The invention discloses an HRP chemiluminescent substrate system, a kit and a preparation method, the HRP chemiluminescent substrate system is composed of a liquid A and a liquid B which are physically isolated and stored; the solution A is an alkaline buffer system with the pH value of 9.0-9.6, and comprises isoluminol or a salt substrate thereof, a cationic surface active agent CTAC and a metal chelating agent diethylene triamine pentaacetic acid; and the solution B is an acidic solution with the pH value of 4.5-5.5, and comprises an oxidizing agent and a reinforcing agent N-(3-chloro-4-hydroxyphenyl) acetanilide. According to the invention, the reinforcing agent N-(3-chloro-4-hydroxyphenyl) acetanilide is placed in the acidic liquid B, when the acidic liquid B is mixed with the alkaline liquid A, the mixed system is maintained at a specific pH value of 8.3-8.6, and the reinforcing agent is rapidly dissociated into phenoxy anions; and carrying out in-situ capture and enrichment on a micelle interface by CTAC cationic micelles with positive charges, which exist in the solution A in advance, through electrostatic attraction. And in cooperation with a low-ion-strength environment brought by no buffer salt in the liquid B, the system ensures the high activity of the HRP enzyme, realizes directional interface catalysis of the enhancer, and significantly improves the luminous efficiency and stability.

The invention relates to the technical field of medicines, in particular to a preparation process of xantinol nicotinate injection and an impurity control method of the xantinol nicotinate injection. According to the process, water for injection is subjected to nitrogen deoxidation treatment, a whole-process nitrogen-sealed environment is maintained, xantinol nicotinate is gradually added in three times, and a multi-component synergistic stable system including hydroxypropyl-beta-cyclodextrin, N-acetyl-L-cysteine, L-methionine, diethylenetriamine pentaacetic acid, sodium metasulfite, sodium thiosulfate and the like is matched, so that the xantinol nicotinate injection is prepared. Double-molecular-weight dextran is introduced to regulate and control a microenvironment, an acetic acid-sodium acetate buffer system is introduced to optimize pH, and finally, high stability and low impurity generation of the finished injection at high temperature are realized through nitrogen replacement subpackaging and precise sterilization conditions. According to the method, the content and the purity of the xantinol nicotinate injection are remarkably improved, the impurity content during sterilization and storage is remarkably reduced, the safety and the effectiveness of drugs are guaranteed, and the method has important significance on optimization of a heat-sensitive injection process.

The present application relates to a kind of waste carbon fiber bismaleimide resin matrix composite fast degradation recycling method, comprising: step one: carbon fiber reinforced bismaleimide resin matrix composite is cut;Step two: after cutting, carbon fiber reinforced bismaleimide resin matrix composite and diethylene triamine solvent are mixed according to mass ratio 1:5~1:40 to form reaction system, heated to 170~190 DEG C, constant temperature reaction 3~5h, after reaction, natural cooling to room temperature;Step three: solid product carbon fiber and resin degradation product solution are obtained by separation, after washing and drying, carbon fiber is recycled, and the resin degradation product solution is subjected to vacuum distillation, and the resin degradation product and diethylene triamine solvent are recycled.The present application is simple in operation, mild in condition, high in recovery rate, the surface of recycled carbon fiber is clean and neat, and the mechanical property retention rate is high;Resin matrix and reaction solvent can be separated and recycled simultaneously, responding to green and sustainable development green and efficient.

The invention relates to fluorescent test paper for visually, efficiently and accurately detecting Cu < 2 + > and a preparation method of the fluorescent test paper, and particularly relates to fluorescent carbon dots synthesized by taking citric acid and diethylenetriamine as raw materials and using a micro-channel reactor, and relates to the technical field of nanomaterials. The fluorescent test paper is prepared by the following steps: i) taking cellulose test paper as a carrier and uniformly carrying a large number of carbon dots; and ii) a copper ion solution can be dropwise added on the test paper to analyze the change of RGB values to prepare a colorimetric card, and the color change of the test paper is judged by combining the colorimetric card and a fluorescent flashlight, so that the copper ions are visually and quantitatively analyzed. During detection, the carbon dots and Cu < 2 + > are subjected to fluorescence quenching reaction, so that visual accurate detection can be realized. The method is accurate, rapid and convenient to operate, visual detection of ions is achieved, and a novel efficient scheme is provided for real-time detection of Cu < 2 + > in the industry.

The invention discloses a method for extracting tellurium from a sodium tellurite solution through electrodeposition, and belongs to the technical field of non-ferrous metal hydrometallurgy. The method comprises the following steps: dissolving crude tellurium dioxide in a sodium hydroxide solution at 60-90 DEG C to prepare a sodium tellurite electrolyte containing 200-240 g / L of tellurium and 90-110 g / L of sodium hydroxide; in the electrodeposition process, a composite additive composed of sodium ascorbate, pentasodium diethylenetriamine pentaacetate, sodium citrate and polyvinylpyrrolidone is synchronously added into the electrolyte. And carrying out electrodeposition for 14-15 days under the conditions that the current density is 40-60A / m, the voltage is 15-30V and the temperature is 15-30 DEG C. Through the synergistic effect of the composite additive, tellurite radicals in the anode region are remarkably inhibited from being oxidized into insoluble sodium tellurate, heavy metal impurity ions in the electrolyte are strongly complexed, and therefore the direct recovery rate of tellurium is increased to 90% or above while the better current efficiency is kept, and the purity of the obtained tellurium ingot reaches 99.95% or above.

The application discloses a culture medium and a process method for reducing cell lactic acid accumulation, which is based on a cell basic culture medium, and after removing original copper ion compounds and DTPA, nitrilotriacetic acid, citric acid and histidine in the basic culture medium, contains the following components and concentration ranges: copper chloride 0.2-0.5 mg / L, copper nitrate 0.2-0.5 mg / L, copper sulfate 0.2-0.5 mg / L, diethylene triamine pentaacetic acid 1-5 mg / L, nitrilotriacetic acid 1-5 mg / L, citric acid 1-5 mg / L, and histidine 0.5-3 g / L; the mass concentration ratio of the copper chloride, the copper nitrate and the copper sulfate is 1:1-5:1. Compared with the prior art, the application has the advantages that: compared with the prior art, the culture medium of the application can inhibit lactic acid generation and promote lactic acid oxidation and decomposition through the synergistic effect of copper ions, chelating agents and metabolism-related substances, and the effect of reducing lactic acid accumulation is remarkable.

The invention relates to a preparation method of ultra-pure electronic-grade pentamethyldiethylenetriamine, and belongs to the technical field of purification of electronic chemicals. The invention aims to solve the technical problem that a by-product N, N-dimethyl piperazine in industrial-grade PMDETA is difficult to efficiently remove. According to the method, industrial-grade PMDETA is used as a raw material, and the method sequentially comprises the steps of microfiltration, ion exchange, vacuum distillation and nanofiltration. Wherein the step of vacuum rectification is carried out under the conditions that the absolute pressure is 1.0-8.0 kPa, the temperature of a tower kettle is 125-160 DEG C and the reflux ratio is 2: 1-6: 1, and efficient separation of N, N-dimethyl piperazine and PMDETA is realized by accurately controlling process parameters. The purity of the finally prepared PMDETA product is larger than 99.99%, the content of N, N-dimethyl piperazine is lower than 16 ppm, meanwhile, the content of metal ions is lower than 10 ppt, the number of particles meets the electronic grade standard, and the method is suitable for the fields of semiconductor and integrated circuit manufacturing and the like.

The invention belongs to the field of uranium removal materials, and provides uranium adsorption montmorillonite / chitosan composite hydrogel and a preparation method and application thereof.The preparation method comprises the steps that a diethylenetriaminepenta (methylene phosphonic acid) solution is added into a chitosan suspension to adjust the pH to be acidic, a reaction is conducted, and an organic phosphonated chitosan solution is obtained; mixing the organic phosphonated chitosan solution with a montmorillonite suspension, and carrying out an intercalation reaction to obtain a mixed solution; mixing the mixed solution with a potassium tripolyphosphate solution, carrying out a first cross-linking reaction to obtain a flocculent suspension, carrying out solid-liquid separation, and dissolving the flocculent suspension in water again to obtain a suspension; and uniformly mixing the suspension liquid with a sodium alginate solution, dropwise adding the mixture into a calcium salt solution, carrying out a second cross-linking reaction to obtain gel microspheres, and carrying out solid-liquid separation and washing to obtain the uranium adsorption montmorillonite / chitosan composite hydrogel. According to the preparation method disclosed by the invention, a potassium tripolyphosphate cross-linked organic phosphonated chitosan molecular chain is successfully introduced into a montmorillonite interlayer structure, so that the morphology structure of original montmorillonite is greatly improved, active sites on the montmorillonite lamellar structure are enriched, and the application efficiency of montmorillonite in uranium-containing wastewater is improved.

The invention discloses a modified montmorillonite-based lubricant and a preparation method thereof, and belongs to the technical field of lubricants, oleic acid and diethylenetriamine are cyclized and quaternized to prepare an oleic acid-based imidazoline quaternary ammonium salt corrosion inhibitor, the oleic acid-based imidazoline quaternary ammonium salt corrosion inhibitor is used for organic modification of nano montmorillonite, a silane coupling agent is further adopted for silanization treatment, and the modified montmorillonite-based lubricant is prepared. The preparation method comprises the following steps: preparing silane modified corrosion-inhibition montmorillonite, carrying out in-situ polymerization coating by taking a urea-formaldehyde prepolymer as a wall material to form montmorillonite modified corrosion-inhibition microcapsules, and carrying out copolymerization on acrylic acid, N, N-bis (2-hydroxyethyl) aminomethylene diethyl phosphonate and trifluoromethacrylate to obtain the modified polyacrylate dispersant with heat-resistant and dispersion-stable functions. The microcapsule, a dispersing agent, dibasic acid ester oil, PAO base oil and an antioxidant are compounded in proportion to form the modified montmorillonite-based lubricant.

The invention relates to a method for jacketing elongate articles, such as lines or cable harnesses in particular, by means of an adhesive tape comprising a tape-shaped substrate, which substrate has, on at least one side, a thermally curable, meltable, preferably pressure-sensitive adhesive layer, the adhesive layer comprising an epoxide-functionalized acrylonitrile-butadiene copolymer which has on average more than 1.5 epoxide groups per molecule and comprising the reaction product of phthalic anhydride and diethylene-triamine, the adhesive tape being led in a helix around the elongate article or the elongate article being enveloped by the adhesive tape in the axial direction, the elongate article together with the enveloping adhesive tape being brought into the desired arrangement, in particular into the cable harness plan, the elongate article being held in this arrangement, and the curable adhesive mass being cured by supplying thermal energy, in particular at a temperature of up to 110° C.

The application relates to the technical field of metal surface treatment, and discloses a composition for electroless plating of high-silicon die-casting aluminum alloy and an electroless plating method, the composition for electroless plating of high-silicon die-casting aluminum alloy comprising an acidic solution and an electroless nickel plating solution; the acidic solution comprises the following components: an oxidizing agent, a polyhydric alcohol, lanthanum nitrate, cerium nitrate, a fluoride, an acrylic acid-2-acrylamide-2-methylpropane sulfonic acid copolymer, diethylene triamine pentaformyl phosphonic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid and a dispersing agent; the electroless nickel plating solution comprises the following components: an organic acid, a reducing agent, a nickel salt, a buffer, thiourea, 1,4-butynediol, sodium saccharin and 2,2'-bipyridine. The composition is used for electroless plating of high-silicon die-casting aluminum alloy, and a plating layer with high gloss and good weather resistance can be obtained on the surface of the high-silicon die-casting aluminum alloy.

The invention provides a radioactive hair detergent as well as a preparation method and application thereof. The radioactive hair detergent provided by the invention is prepared from the following formula: 100g of water, 35g of one or two of sodium laureth sulfate and palm kernel oil amide DEA, 3g of one or two of glycerol and polyquaternium-7, 0.5 g of salicylic acid, 10g of cocamidopropyl betaine, 0.3 g of one or two of methyl chloride isothiazolinone and methylisothiazolinone, and the balance of water. The coloring agent is prepared from, by weight, 8 g of one or two of tetrasodium iminodisuccinate and tetrasodium glutamate diacetate, 1 g of pentasodium diethylene triamine pentaacetate and 0.1 g of one or two of Cl19140 and Cl42090 coloring agents. Through special chemical formula design, the hair cleaning agent has strong dirt-removing power, the radioactivity level of hair is remarkably reduced within a short treatment time, and it is ensured that radioactive contamination on the hair of related workers can be rapidly and efficiently cleaned.

The present application provides a kind of bio-based flame retardant-nano calcium carbonate, preparation method and its application in epoxy resin, the present application uses chemical synthesis reaction, preparation with vanillin, polyethylene imine, diethylene triamine and phytic acid as raw material, design multi-arm dendritic compound, combine molecular modification technology, synthesis green environmental protection biomass-based novel flame retardant Trif-V-PP with acid source, carbon source and gas source function, can enhance the flame retardant performance of epoxy resin.In addition, Trif-V-PP is combined with nano calcium carbonate, and the flame retardant performance and mechanical property of epoxy resin can be further enhanced.

The application relates to the technical field of silver-coated nickel powder preparation, in particular to silver-coated nickel powder with compact silver layer and a preparation method, which comprises the following steps: adding nano silver ions, sodium dodecyl benzene sulfonate, deionized water and ethanol into a reaction kettle and stirring, then adding nickel powder after acid washing and sodium potassium tartrate and stirring, adding sodium hydroxide in the stirring process to obtain a nickel powder reduction liquid; adding silver nitrate and diethylene triamine into deionized water, uniformly stirring to obtain a silver source solution, heating the nickel powder reduction liquid in the reaction kettle, dropping the silver source solution into the nickel powder reduction liquid for chemical reaction, obtaining local reaction intensity and reaction consistency of each temperature measuring point in the reaction process, then obtaining reaction abnormality to obtain an expected reaction temperature, and cleaning to obtain wet powder of the silver-coated nickel powder after the reaction is completed, and the silver-coated nickel powder body with compact silver layer is prepared through drying. The application can improve the adjustment precision of the silver coating reaction temperature and guarantee the preparation quality of the silver-coated nickel powder body.

The application discloses a kind of ambient temperature fast-curing cardanol curing agent and its preparation method and application;The application is prepared by 2-bromoethylamine hydrobromide, potassium hydroxide and anhydrous ethanol after mixing reaction 2-bromoethylamine;Cardanol, diethylene triamine DETA, formaldehyde solution are mixed after reaction to obtain cardanol curing agent intermediate PK3;2-bromoethylamine, PK3, potassium carbonate and acetone are mixed after reaction to prepare ambient temperature fast-curing cardanol curing agent PK3-ENH2.The ambient temperature fast-curing cardanol curing agent production process of the application is simple, and the production equipment is not high in requirement.The ambient temperature fast-curing cardanol curing agent of the application has good chemical resistance, adhesion, physical and mechanical properties of solvent type epoxy coating, and has the characteristics of low pollution, simple construction, etc.

The application provides a non-acid composite active plug removing agent and a preparation method thereof, and belongs to the technical field of plug removing agents.The non-acid composite active plug removing agent comprises the following raw materials: ethylene-vinyl acetate copolymer, a solvent, a mutual solvent, an organic sulfonate, diethylene triamine pentaacetic acid, sodium gluconate, a pH regulator, benzotriazole, hydroxyethyl ethylenediamine triacetic acid and methanol.The non-acid composite active plug removing agent is composed of an organic sulfonate, various active agents and a penetrating agent and the like.Through the penetration and dispersion of molecules, various types of plugging materials in the rock gap throat are dispersed, the pore throat is increased, and an effective seepage channel is formed.The non-acid composite active plug removing agent prepared by the application does not corrode and damage metal pipes and the dense rock body, is not acid-sensitive, does not cause flowback pollution, has a long plug removing and dredging distance, has a good and long-lasting effect, and is a new method for deep plug removing.

The invention relates to NAG detection test paper and a preparation method thereof.The NAG detection test paper comprises a solution A, a solution B and a solution C. The solution A is a substrate solution and comprises CNP-NAG, DMF and / or DMSO serving as a solvent and purified water and further comprises TMN and / or ethylene glycol diethyl ether; the solution B is a phosphate buffer solution; and the liquid C is one or more of fumaric acid-allylsulfonic acid copolymer and / or nitrilotriacetic acid (NTA), EDTA sodium salt / potassium salt, diethylene triamine pentaacetic acid (DTPA) and salt thereof, hydroxyl ethanediphosphonic acid (HEDP), sodium ethylenediamine disuccinate (EDDS) and cyclohexane triacid (CDTA). In the preparation process, firstly, filter paper is sprayed / soaked with the liquid A and then dried, then the filter paper is sprayed / soaked with the liquid B and the liquid C step by step, hot air at the temperature of 47 DEG C or below is used for drying, and finally cutting and sealing preservation are conducted to prepare the NAG detection test paper. The method has the advantages of simplicity and convenience in operation, stable performance and high sensitivity, and the stability and the service life of the test paper are improved.

The invention relates to the technical field of polyurethane, in particular to an ultra-low thermal conductivity fireproof thermal insulation material based on a rigid foam polyurethane foaming material, which is prepared from the following raw materials: polyether polyol, diphenylmethane diisocyanate, modified expanded graphite, cyclopentane, perfluoroalkylated nanocellulose, pentamethyldiethylenetriamine and silicone oil. The modified expanded graphite rapidly expands at high temperature to form a compact wormlike carbon layer, the compact wormlike carbon layer covers the surface of the material, oxygen is effectively isolated, heat is prevented from being transmitted to a base material, meanwhile, acidic substances released between the layers can catalyze the base material to form carbon, and the stability of the fireproof barrier is enhanced; the perfluoroalkylated nanocellulose is used as a nano nucleating agent, so that a foam structure can be refined, and gas heat conduction and radiative heat transfer are remarkably reduced; the hydrophobicity of the perfluoroalkyl chain reduces the adsorption of water in foam pores, maintains low thermal conductivity, forms a micro-reinforced network in a carbon layer, and improves the integrity and heat insulation efficiency of the carbon layer at high temperature.

The application discloses a method for simultaneously removing ash, reducing acid value and reducing total sediment of ship oil-containing pollutants, and belongs to the technical field of waste oil regeneration and utilization. The method aims to solve the problems of complex process and inability to simultaneously and efficiently remove various impurities in the prior art for treating ship oil-containing pollutants. The ship oil-containing pollutant raw material is heated to 75-85 DEG C, 5% of the raw material by mass of a composite treatment agent composed of polyoxypropylene polyoxyethylene ether block copolymer, triethanolamine, diethylene triamine and solvent oil is added, and constant temperature reaction is carried out for 1-2 hours; then 5% of the raw material by mass of water is added, and constant temperature reaction is continuously carried out for 1-2 hours; finally, the mixture is heated to 90-95 DEG C and then centrifugal separation is carried out, so that qualified marine fuel oil is obtained. The method has one-dose multi-effect and integrated process, and the process is simple; ash, acidic substances and total sediment in the raw material can be efficiently and synergistically removed; the product quality meets the national standard requirements; and the method has remarkable economic and environmental protection benefits.

The present application relates to the technical field of artificial stone preparation, in particular to a resin-based artificial stone and a preparation method thereof. The artificial stone comprises the following components in parts by mass: coal gangue 38-45 parts, carbide slag 28-34 parts, desulfurization gypsum 20-30 parts, mineral powder 18-26 parts, water-based epoxy resin 30-45 parts, diethylene triamine 5-10 parts, modified polyurethane fiber 10-15 parts, and quartz sand 220-260 parts. The present application uses solid waste such as coal gangue as a component of the artificial stone, realizes resource utilization, reduces cost, and adds modified polyurethane fiber to effectively improve the performance of the prepared artificial stone.

The application discloses a B-doped PdCu bimetallic olefin catalyst and a preparation method thereof. The preparation method comprises the following steps: mixing a palladium source, a copper source, potassium hydroxide, dimethylformamide, ethylene glycol and diethylene triamine to obtain a mixed solution; placing the mixed solution into a reaction kettle to react to obtain a sample; washing and drying the sample to obtain a precursor; and immersing the precursor into a dimethylformamide solution containing a boron source to react in an ice water bath to obtain the B-doped PdCu bimetallic olefin catalyst. The catalyst obtained by the application has the characteristics of high activity. The application further discloses an application of the B-doped PdCu bimetallic olefin catalyst.