36results about How to "Efficient Adsorption Separation" patented technology

The invention relates to preparation of a lithium ion adsorption material, especially to a preparation method for a 2-hydroxymethyl-12-crown 4-ether modified hierarchically-porous silicon material, belonging to the technical field of synthesis of composite materials. The preparation method comprises the following steps: preparing nanocrystal cellulose at first; then with nanocrystal cellulose as a hard template and cetyl trimethyl ammonium bromide as a soft template, preparing a hierarchically-porous silicon material by using a template process; and then modifying the hierarchically-porous silicon material with 2-hydroxymethyl-12-crown 4-ether. The invention also discloses application of the modified hierarchically-porous silicon material to adsorption of alkali metal ions, especially to adsorption of lithium ions in salt lake bittern. According to the invention, the hierarchically-porous material with a high specific surface is employed, so the adsorption capacity of the modified hierarchically-porous silicon material is greatly improved; and the preparation process is simple and easy to operate. The lithium ion adsorption material prepared in the invention can realize high-efficiency high-selectivity adsorption and separation of alkali metal ions, especially lithium ions, and provides a feasible solution to sustainable development of the industry of extraction of lithium from a salt lake.

This invention relates to a method for preparing magnetic iron oxide / nanoscale zeolite molecular sieve composite. The method comprises: (1) selecting nanoscale zeolite crystal material; (2) introducing Fe2+ / Fe3+ as active reaction sites through ion exchange under the action of electrostatic attraction; (3) dropping 25% ammonia solution for reaction of the active sites in an alkaline medium, washing with water and drying; (4) removing phosphate ions and arsenate ions from water by using a dynamic adsorption apparatus. The method has such advantages as low cost, simple operation and high adsorption rate, and can be widely used for water purification.

The invention provides a macroporous phenolic resin, a preparation method thereof and an application in adsorbing 5-hydroxymethylfurfural. The BET specific surface area of ​​the macroporous phenolic resin of the present invention is 400~1300m 2 / g, the pore volume is 0.3~1.5cm 3 / g, the average pore diameter is 1-20nm. The macroporous phenolic resin of the present invention has high specific surface area, high adsorption capacity, high adsorption selectivity, and rich pore structure is easy to regenerate and recycle, and the macroporous phenolic resin has abundant hydroxyl functional groups, and through hydrogen bonds and hydrophobic interactions, the The adsorption capacity of 5-hydroxymethylfurfural is greatly improved, the maximum adsorption capacity can reach 111mg / g wet resin, and the elution yield of 5-hydroxymethylfurfural is greater than 99.5%; the efficient separation of 5-hydroxymethylfurfural is realized. The macroporous phenolic resin of the present invention is applied to adsorption and separation of 5-hydroxymethylfurfural, does not generate waste water, can greatly shorten the initial concentration time of 5-hydroxymethylfurfural, and realizes green separation.

The invention belongs to the technical field of preparation of dye adsorption materials, and provides a magnetic recyclable CoNi-MOFs@GR adsorbent, a preparation method and an application for adsorption of organic dyes. The CoNi‑MOFs@GR adsorbent is a bimetallic organic framework compound CoNi‑MOFs supported on graphene GR. CoNi‑MOFs have large specific surface areas, active sites, and pores. GR has high thermal stability, can be used as an adsorbent carrier itself and has adsorption function, and it also has a large specific surface area and active sites. The adsorbent formed by GR and CoNi‑MOFs has the advantages of increased specific surface area, more active sites, and enhanced chemical stability, which enhances its adsorption capacity and can achieve efficient adsorption of methylene blue MB, Congo red CR and neutral red NR. Separation, easy to separate from the solution, and can be recycled and reused.

The present application discloses a method for separating propylene / propane, which is characterized in that the separation is adsorption separation; the adsorbent used in the adsorption separation includes modified molecular sieves modified by imidazole compounds. The method described in this application has high selectivity to propylene, and the separation ratio of propylene / propane is as high as 4.3 or more, which reflects the high-efficiency propylene / propane adsorption and separation performance, can realize the effective separation of propylene / propane in pressure swing adsorption, and meets the requirements of industrial pressure swing adsorption Separation of propylene / propane requirements reduces industrial operating costs.

The invention provides a nanofiber foam based oil gas trapping device and a preparation method thereof. The nanofiber foam based oil gas trapping device is characterized in that: it includes an gas collection pump in connection with a gas delivery pipe, the gas delivery pipe is connected to an oil-gas trapping assembly, the oil-gas trapping assembly is connected to an exhaust pipe and a collection pipe, and the collection pipe is connected to an oil substance recycling bin. Specifically, the oil-gas trapping assembly includes a protective box, and the protective box is internally provided with a nanofiber based foam material. The nanofiber foam based oil gas trapping device has the characteristics of simple preparation process, low cost, convenient operation, integrated oil-gas adsorption recovery, high efficiency and continuity, and has wide application at gas stations, oil plants, wharfs and other sites, and in manufacturing industry, surface coating industry and other fields.

The invention belongs to the technical field of the preparation technology and the separation technology of materials, relates to a preparation method of a nano-structure composite absorbing material and particularly relates to a preparation method of a novel maleic-acid modified meso-porous silicon material and an application of selective rare-earth ions. The method adopts maleic-acid amide as modified ligand, and adopts high-specific-surface meso-porous silicon as a supporting material to prepare the composite modified material which can realize selective absorption and separation of the rare-earth ions in mineral waste water. The result shows that the modified meso-porous silicon material obtained by utilizing the preparation method has excellent selective absorbing performance of the rare-earth ions.