258 results about "Adsorptive membrane" patented technology

The invention discloses a sulfur-containing bis-imidazoline type carbon dioxide corrosion inhibitor and a preparation method thereof. The corrosion inhibitor comprises the following components in percentage by weight: 20-50 percent of sulfur-containing bis-imidazoline quaternary ammonium salt, 1-5 percent of nonionic surfactant, 40-70 percent of low molecular alcohol solvent and 5-10 percent of alkynol, wherein a sulfur-containing bis-imidazoline compound has a general formula of a structure which is shown in the specification; the number of carbon atoms in R of the formula is 5 or 8; the nonionic surfactant is fatty alcohol-polyoxyethylene ether or alkylphenol ethoxylate; the low molecular alcohol solvent is methanol, ethanol, isopropanol or ethylene glycol; and the alkynol is propargyl alcohol or hexynol. In the invention, the sulfur-containing bis-imidazoline compound which is generated through dehydration between dicarboxylic acid and polyamine molecule, dehydration reaction in the molecule and further reaction with the sulfur-containing compound is adopted; the molecule contains a plurality of active adsorption centers such as two diazo five-membered heterocyclic rings, a sulfur-containing group and the like; and a formed organic adsorption membrane has better protection effect on carbon steel.

A disposable, virus-trapping membrane, and a corresponding method to remove viruses from solution are described. The membrane includes a disposable, micro-porous filter membrane and a ligand immobilized on the membrane. The ligand irreversibly and selectively binds viruses. The ligand also has a pKa sufficiently high to repel antibodies via electrostatic charge repulsion.

The invention discloses s preparation method of a hydroxypropyl guar gum/nanocellulose cross-linked adsorption film. The method takes hydroxypropyl guar gum and microcrystalline cellulose as main raw materials, and comprises the steps: thinning the microcrystalline cellulose in a nano grinder and a high-strength ultrasonic wave generator successively to prepare nanocellulose, then respectively dispersing and dissolving the nanocellulose and hydroxypropyl guar gum in maleic acid, then adding maleic anhydride and sodium hypophosphite, stepwise heating to carry out esterification and cross-linking reaction, centrifuging and defoaming the reactant, shaping the reactant in a mold, forming a film by drying, and cleaning and freeze-drying the film to obtain the adsorption film. The film prepared by the method is light yellow and transparent, has good adsorptive capacity on copper ions, zinc ions, led ions, methylene blue and methyl violet, and simultaneously has higher mechanical properties.

The invention belongs to the technical field of sewage treatment, and especially relates to a phosphorus-free scale and corrosion inhibitor, and a preparation technology thereof. The preparation technology of the phosphorus-free scale and corrosion inhibitor has the advantages of simplicity, no generation of toxic substances, environmental protection and low cost; and the molecular chain of the prepared scale and corrosion inhibitor contains rich ether groups, carboxylate radicals and other active groups, the phosphorus-free scale and corrosion inhibitor and scale forming cations form a stable structure in order to reach the high-efficiency scale and corrosion inhibition purpose, the corrosion inhibitor has the advantages of phosphorus-free, nontoxic, green and environmentally-friendly components, good biodegradability and small use amount, can form an adsorption film on the surface of metal in order to realize the corrosion inhibition effect, has good chelating and dispersing effects on calcium salts in water, and has a distortion effect on crystals to increase the internal stress of the crystals in order to make the crystals easily ruptured.

A novel method of making an adsorptive membrane that incorporates super activated carbon particles in which the activated carbon particles that are incorporated within the membrane retain their highly adsorptive characteristics. In accordance with one form of the method of the invention, the multiplicity of small pores in the activated carbon particles are uniquely protected from becoming clogged during the process of forming the adsorptive membrane by initially wetting the particles with water prior to intermixing the particles with the hydrocarbon solvent solution of a polyurethane resin from which the membrane is formed.

The invention discloses a foaming agent for a light grouting material. The foaming agent comprises the following components, by weight: 5-8 parts of alkylphenol polyoxyethylene, 1-3 parts of sodium alcohol ether sulphate, 2-5 parts of sodium dodecyl sulfate, 3-6 parts of fatty alcohol ammonium sulfate, 1-2 parts of polyacrylamide, 1-2 parts of sodium carboxymethyl cellulose, 2-3 parts of xanthan gum, 0.5-2 parts of modified carbon foam powder and 80-100 parts of water. The foaming agent provided by the invention has high foaming capacity and strong foam stability; and the produced foam has surface adsorption film with high strength, and the foaming agent has advantages of good temperature adaptability, biodegradability, no toxicity or corrosion, low cost and easiness for usage.

A protective article such as a glove, sock or vest and the method of making same that is easy to don, is comfortable to wear and, at the same time, due to the incorporation of a novel membrane within which the highly adsorptive super-activated carbon particles are embedded, provides substantial protection to the user against exposure from hazardous chemical vapors. A unique feature of the method of the invention for making the protective articles of the invention is the novel step of incorporating highly adsorptive super-activated carbon particles within a thin polyurethane membrane in a manner such that the adsorptive properties of the activated carbon particles remain substantially undiminished.

The invention relates to a heavy metal ion adsorption film and a preparation method thereof. The adsorption film is composed of a metal organic frame material, 2-mercapto benzimidazole, a modifier, a stabilizer, a solvent A and a solvent B. The 2-mercapto benzimidazole is fixedly carried on the metal organic frame material and is used for enhancing the adsorption capacity of the adsorption film for the heavy metal ion.

The invention discloses a porous adsorption film and belongs to the field of macromolecules. The porous adsorption film is prepared from chitosan sol, a beta-cyclodextrin polymer, polyethylene glycol-20000, a silane coupling agent and titanium dioxide colloid according to a certain ratio, wherein the beta-cyclodextrin polymer is formed by crossly linking beta-cyclodextrin and sodium citrate; the chitosan sol is formed by adding chitosan into acetic acid and stirring; and the titanium dioxide colloid is prepared from tetrabutyl titanate, absolute ethyl alcohol, distilled water and glacial acetic acid. The porous film can adsorb heavy metal ions and also can adsorb organic matters. The invention further discloses a preparation method of the porous adsorption film.

The invention relates to the technical field of metal corrosion inhibition and particularly discloses a benzimidazoline corrosion inhibitor prepared from refined swill-cooked dirty oil, of which the chemical formula is as shown in the description, wherein R=C(16-20) saturated alkyl or unsaturated alkyl; and R1=H, CH3 and C6H5. The corrosion inhibitor is obtained in the way that saturated alkyl and unsaturated alkyl or phenyl, of different chain lengths, are added into benzimidazole molecules, so that the hydrophobicity of a protective film is improved while the density of pi electron cloud, capable of being coordinated with metals, in the molecules is increased, accordingly, the metal corrosion rate is greatly reduced, and the metal anticorrosiveness is increased. The corrosion inhibitor is an oil-soluble product, can be used for corrosion protection of oil field pipelines and industrial pickling, can form a compact and firm adsorption film on a metal surface, reduces the metal corrosion rate and achieves the purpose of metal corrosion protection.

A hybrid adsorbent-membrane reactor in which the chemical reaction, membrane separation, and product adsorption are coupled. Also disclosed are a dual-reactor apparatus and a process using the reactor or the apparatus.

This invention provides a membrane electrode material and its preparation method, as well as the application of the material into lithium extraction by adsorption-electrochemical coupling method. The membrane electrode material is described as MnO@C. The preparation steps are as follows: LiMn₂O₄ is firstly obtained by calcining lithium carbonate and manganese carbonate, which is then dispersed in hydrochloric acid solution. After stirring and separating, the solid products are dried to obtain λ-MnO₂. The λMnO₂ is added to the raw material of Mn-MOF-74, and then the Mn-MOF-74 coated λ-MnO₂ can be obtained by hydrothermal reaction. By further calcining Mn-MOF-74 coated λ-MnO₂ in nitrogen atmosphere, the membrane capacitor/electrode material can be obtained as MnO@C. The material is fabricated into an adsorption film electrode plate and assembled into an adsorption-electrochemical coupling lithium extraction device. The pure lithium solution can be obtained in the recovery pool through the combined lithium extraction and lithium recovery process. In this invention, the thickness of the carbon coating layer in the electrode material is adjustable. Adsorption-electrochemical coupling technology takes the advantages of both adsorption and electrochemical lithium intercalation, which can extract and recover lithium resources with high capacity. Thus, this invention not only achieves high-efficiency separation of lithium resources, but also opens up a new way for the extraction of lithium resources.

The invention discloses an anti-flash-rust agent for water-based paint and a preparation method of the anti-flash-rust agent. The anti-flash-rust agent is formed by compounding imidazoline ionic liquid, triazole ionic liquid, quaternary ammonium salt ionic liquid, organic phosphate, alkynol and deionized water according to the mass ratio of 20-60 : 20-60 : 20-60 : 4-25 : 4-25 : 1000. According tothe method, a uniform and compact adsorption film is easily formed on the metal surface, electrochemical corrosion on the metal surface is effectively prevented, and the effect of inhibiting corrosionis achieved. The anti-flash-rust agent is applied to the water-based paint, the anti-flash-rust performance is good, the use amount is small, and it can be guaranteed that rust spots do not appear onthe metal surface only by adding 0.7 to 1.2 wt% of the anti-flash-rust agent.

The invention provides a composite adsorption film for removing fluorine in water.The composite adsorption film is prepared from, by mass, layered magnesium-aluminum composite hydroxide, a high-molecular polymer and an organic solvent.The high-molecular polymer is preferably one of polyether sulfone, polysulfone and polyvinylidene fluoride.The organic solvent is one of N,N-dimethylacetamide, N,N-dimethylformamide and N-methyl pyrrolidone.The layered magnesium-aluminum composite hydroxide is firmly inlaid in a high-molecular basement membrane, and is not prone to fall off.The composite adsorption film is applied to high-fluorine water treatment, the fluorine content can be reduced to 1 mg/L or below, and the national hygienic standard for drinking water is met.The preparation process is simple, the composite adsorption film can be machined into a film device according to needs, and industrial application can be achieved.

Systems and methods for enhancing quantitative transfer of analytes to an adsorptive substrate are provided. A preferred embodiment provides an improved transfer system and method that reduces “blow through” of low molecular weight analytes and increases the adsorption of low molecular weight, for example proteins of about 30 kDa or less compared to conventional transfer techniques. It has been discovered that using a secondary porous backing membrane in conjunction with an adsorptive membrane such as nitrocellulose or polvinylidene fluoride increases the efficiency of analyte interaction with the adsorption membrane compared to transfers techniques using the adsorption membrane without the secondary backing membrane. This improvement of quantitative analyte transfer efficiency facilitates a wider range of detection processes, such as direct analysis by MALDI mass spectrometry than in earlier applications of the process without the secondary backing membrane.

The invention relates to an electroplating CBN grinding wheel for efficient and precise gear profile grinding. The electroplating CBN grinding wheel comprises a dish-shaped base body and a material grinding area at the edge of the dish-shaped base body, the mass of the material grinding area is 4%-15% of the total mass of the base body, the cross-section of a material grinding layer on the material grinding area is in an isosceles trapezoid shape, and the upper bottom and the two lateral edges are chamfered. A manufacturing method of the electroplating CBN grinding wheel includes the steps of firstly machining the base body of the grinding wheel, and then sequentially conducting negative and positive pole alternative electrochemistry oil removing, clamp and electrostatic adsorption film insulation assembling, negative and positive pole alternative electrolytic treatment, ballistic method preplating, grinding material assembling, thickening and grinding wheel electroplating on the base body of the grinding wheel. The using linear velocity of the electroplating CBN grinding wheel can achieve 250 m/s, and the grinding feeding amount achieves 4 m/min-10 m/min and is much higher than that of a common grinding wheel. The roughness Ra can achieve 0.4 micrometers, the surface quality requirement of a workpiece can be met, and gear efficient and precise gear profile grinding can be successfully achieved.

The invention discloses lubricant for drilling fluid and a preparation method thereof. The method comprises the steps as follows: firstly adding 70 to 90 parts of solid graphite into a crusher, ensuring that the solid graphite is machined into 200 mesh graphite fine powder, then shifting the graphite fine powder into a container with a stirrer, stirring and adding 10 to 30 parts of nonyl phenol ether into the container, ensuring that the nonyl phenol ether and the graphite fine powder are sufficiently mixed, and finally performing weighing and packaging through a packaging machine. After being added into drilling fluid, the lubricant can form a layer of firm adsorption film on surfaces of a drill, a drilling tool and other tools, can greatly reduce the wear of the drilling toll during the drilling process, does not has fluorescence, and does not interfere geological logging.

The invention belongs to the field of compound monitoring, and discloses a DGT adsorption film, a preparation method and a method for monitoring perfluorinated and polyfluorinated compounds based on aDGT technology. The method comprises the following steps: (1) mixing agar powder, activated WAX resin particles and pure water according to a certain mass ratio, uniformly shaking, and heating untilthe mixture is boiled to be transparent so as to obtain an agarose solution of WAX resin; and (2) preparing an adsorption film by utilizing the agarose solution of the WAX resin, wherein the adsorption film contains WAX resin, and WAX resin particles are uniformly distributed in a film matrix. The perfluoro and polyfluoro compounds are monitored by using a DGT device containing a WAX adsorption film, the adsorption film is eluted by using an eluent to obtain an eluent after the monitoring is finished, and the concentrations of the perfluoro and polyfluoro compounds in the eluent are measured.The method can realize accurate monitoring of perfluoro and polyfluoro compounds, does not need to collect a large number of samples, and significantly reduces the monitoring cost.

The invention discloses a double-layer foaming composite adsorption film for sewage treatment and a preparation method thereof. The double-layer foaming composite adsorption film is prepared from thefollowing steps of a, preparing a foaming agent/porous ceramic micro capsule; b, preparing a foaming agent/diatomite micro capsule; c, mixing the foaming agent/porous ceramic micro capsule with polyurethane prepolymers and ethylene/vinyl acetate copolymers to prepare a mixture A; d, preparing the foaming agent/diatomite micro capsule by a method in the step c to obtain a mixture B; e, extruding the mixture A and the mixture B through double-layer co-extrusion equipment to form the film; obtaining the double-layer foaming composite adsorption film for sewage treatment. The prepared double-layerfoaming composite adsorption film with fine and small hole diameter and complicated and many passages has the advantages that the dispersion of adsorption filling materials is uniform; the adsorptionpassages are many; the adsorption efficiency is high; in addition, different adsorption layers have the adsorption selectivity; the types of adsorbed pollutants are many; the industrial production and application are easy.