46results about How to "Preferential adsorption" patented technology

The invention discloses a photocatalytic air purifier which takes a light-emitting diode as light source, a dust-resistant filter net which is detachable and easy to clean is arranged at an air inlet which is arranged on the lower part of a shell body of a purifier, the dust-resistant filter net which is detachable and easy to clean is arranged at an air outlet which is arranged on the upper part of the shell body; a light-emitting diode array which is taken as the light source and a photocatalytic layer are parallelly arranged in the shell body, the photocatalytic layer is composed of a modified titanium dioxide photocatalyst which is loaded on an activated carbon fiber; the photocatalytic layer of the air purifier simultaneously has the effects of absorption enrichment and photocatalytic degradation of volatile organic compounds, thereby effectively improving the efficiency of the photocatalytic degradation; the light-emitting diode array is adopted as the light source, thereby overcoming the defect of uneven illumination of an ultraviolet lamp tube and being characterized by high optical to electrical conversion rate, long service life and high space and time efficiency, the high-low arrangement of the light-emitting diode array and the photocatalytic layer utilizes the characteristic that gas is raised after heating to realize the effective convection of air without a fan, thereby reducing the energy consumption and simplifying the device.

The invention discloses a synthetic ammonia catalyst used under non-pressurized and low-temperature conditions and a preparation method thereof. The catalyst contains transition metal nanoclusters andmain group metal electron promoter, wherein the transition metal nanoclusters are dispersed in a carbon nano tube cavity of which inner diameter is about 1-4 nanometers. Because a carbon nano tube isprovided with a one-dimensional nanoscale straight-through pore passage, a unique limitation domain environment is formed, so that the wrapped transition metal nanoclusters catalyst has high synthesis ammonia activity and stability under the non-pressurized and low-temperature conditions, and lays a foundation for further development of the synthesis ammonia catalyst under a mild condition.

The present invention discloses one-section cascade hydrocracking process, and features the hydrocracking unit comprising one hydrocracking pre-treating reactor filled with pre-treating catalyst and hydrocracking catalyst and one hydrocracking reactor filled with hydrocracking catalyst and post-hydrotreating catalyst connected serially. Compared with available technology, the hydrocracking unit of the present invention has the advantages of raised integral activity, increased treating capacity or increased operation period, and raised product quality.

The invention relates to the technical field of oil-gas drilling. The invention discloses a polymer, a preparation method and an application thereof, and a water-based drilling fluid containing the polymer, wherein the polymer contains a structural unit A, a structural unit B and a structural unit C; the structural unit A is selected from at least one of structural units having a structure represented by a formula (11), a structure represented by a formula (12) and a structure represented by a formula (13); the structural unit B is a structural unit with a structure shown in a formula (2); thestructural unit C is selected from at least one of structural units with a structure shown in a formula (31) and a structure shown in a formula (32); the weight-average molecular weight of the polymer is 350,000-600,000. When the polymer provided by the invention is used as a drilling fluid dispersing agent, good hydration dispersion can be realized in a high-calcium environment, so that a good dispersion effect is achieved, and the thermal stability of a drilling fluid is improved.

A disclosed polishing fluid for stainless steel materials is characterized by being prepared from the following raw materials in parts by weight: 7-9 parts of aluminium oxide, 3-5 parts of magnesium oxide, 2-3 parts of manganese oxide, 1-2 parts of zinc sulfate, 2.5-3.5 parts of polyvinylpyrrolidone, 4-6 parts of ethylene dimethacrylate, 3.5-5 parts of disodium hydrogen phosphate, 1-2 parts of lithium bis(trifluoromethanesulphonyl)imide, 1-2 parts of methionine, 4-6 parts of tween 80, 5-7 parts of an auxiliary agent, and 300 parts of deionized water. The prepared mixed polishing fluid is safe, non-toxic, free of unpleasant smells, and reasonable in formula. Through the cooperation of the abrasive and the surfactant, preferential adsorption is realized, and a long-term easily-cleaned physical adsorption surface is formed. The polishing fluid belongs to an aqueous polishing fluid, is capable of substantially reducing temperature caused by friction during polishing, avoiding burn phenomenon on a material surface and giving play to good cooling effect. The polishing fluid is added and used when a stainless-steel material machine needs polishing.

The present invention relates to a SiO 2 A method for preparing a superhydrophobic coating on a glass surface. The method of the present invention mainly constructs a micro-nano structure on the glass surface through a layer-by-layer self-assembly method, and repeatedly soaks the pretreated glass in polyacrylic acid solution and silver-modified polyetherimide. In the amine solution, a multi-layer film with a stable structure is formed on the surface of the glass, and then a hydrophobic coating is applied on the surface to obtain a super-hydrophobic coating. The process is simple, the cycle is short, the cost is low, and the stability and hydrophobicity of the coating are good. The inventor finds through a large number of tests that the hydrophobicity of the multilayer film is better when it is between 8-14 layers; the hydrophobic coating contains silver and titanium dioxide nanoparticles, which makes the coating have better stability and lasting antibacterial effect , adding a certain amount of titanium dioxide nanoparticles helps to improve the roughness of the coating and improve the hydrophobicity.

The invention discloses a waste acid resourceful treatment process based on a nano-composite carrier retarding method. The process comprises the following steps that primary filtration is carried out, wherein acid pickle is filtrated, and suspended matter, oil and colloidal matter in the acid pickle are separated out primarily; secondary filtration is carried out, wherein a secondary filter is used for further removing residual particles in primary filtration penetrating liquid; acid retarding separation is carried out, wherein the filtrated acid pickle is treated through an acid retarding separation device which contains an acid retarding carrier SEW-501, and the carrier carries sulfonate radical and a quaternary ammonium group; when the acid pickle passes through the acid retarding separation device, acid molecules in the acid pickle are retarded on the acid retarding carrier, other impurities in the acid pickle penetrate through the acid retarding carrier to flow out of the acid retarding separation device in the mode of penetrating liquid, and therefore acid modules in the acid pickle are retarded in the acid retarding separation device; after the acid retarding carrier is saturated, resolving water is pumped into the acid retarding separation device to dissolve out acid modules in the acid retarding carrier, and finally pure acid is produced.

ASiO2-C modified Al2O3 carrier is prepared from SiO2, C and Al2O3, and has the pore volume of 0.5 mL / g-1.1 mL / g, the specific surface area of 180 m<2> / g-270 m<2> / g and the average pore size of 5 nm-13 nm, wherein the weight of SiO2 and the weight of C are 0.7wt%-15wt% and 0.05wt%-7wt% of that of Al2O3 respectively. The SiO2-C modified Al2O3 carrier has the advantages of being good in heat stability, high in mechanical strength, proper in surface acid-base property and simple to prepare.

The invention relates to the technical field of oil and gas drilling, and discloses a calcium-resistant zwitterionic polymer, its preparation method and application, and a water-based drilling fluid containing the polymer as a dispersant. The polymer contains structural unit A, structural unit B and a structural unit C, said structural unit A is at least one selected from the structural units having a structure shown in formula (11), a structure shown in formula (12) and a structure shown in formula (13); said structure Unit B is a structural unit having a structure shown in formula (2); said structural unit C is at least one selected from the structural units having a structure shown in formula (31) and a structure shown in formula (32); said The weight-average molecular weight of the polymer is 350,000-600,000. When the polymer provided by the invention is used as a drilling fluid dispersant, it can realize good hydration dispersion in a high-calcium environment, play a good dispersing effect, and improve the drilling fluid. thermal stability.

The invention provides a selective oxygen-permeable membrane and its preparation method and application, belonging to the field of air batteries. The present invention disperses ZIF-8 coated with thin-layer polydopamine in a matrix containing PMMA, and utilizes 3D printing to obtain a mixed matrix film; the amino group in ZIF-8 is to CO 2 It has a strong adsorption effect; the polydopamine coating can reduce the gap between the MOF particles and the polymer matrix PMMA, and promote the fixation of the MOF particles in the matrix membrane, and the abundant ‑OH groups in polydopamine and CO 2 Molecules also have strong interactions; the PMMA matrix is ​​rich in ‑C=O, for CO 2 It has a repelling effect and is also a hydrophobic material, which can prevent the battery from being poisoned by water vapor in the air; the prepared selective oxygen-permeable membrane is resistant to CO 2 Has preferential adsorption properties, while the adsorption capacity for oxygen is significantly lower than CO 2 , can be used as a porous waterproof and breathable layer material that is easy to process, has the functions of blocking carbon dioxide and oxygen permeability.

The present application discloses an adsorbent and its preparation method and application. The adsorbent includes a modified molecular sieve modified by imidazole compounds; wherein, the modified molecular sieve is an ion-exchanged molecular sieve. The preparation method uses molecular sieves as raw materials, undergoes ion exchange, and then modifies the adsorbent with imidazole compounds. The adsorbent prepared by this application reduces the polarity of the surface of the molecular sieve skeleton, improves the selectivity of the adsorbent to methane, and has a methane / nitrogen separation ratio as high as 3.5 or more, reflecting efficient methane / nitrogen adsorption and separation performance, and can realize pressure swing adsorption. The effective separation of methane / nitrogen meets the requirements of industrial pressure swing adsorption separation of methane / nitrogen and reduces industrial operating costs.