14results about How to "Good adsorption and separation performance" patented technology

The invention discloses a preparation method of defective zirconium-based MOFs and application of the defective zirconium-based MOFs in separation and purification of astaxanthin, and belongs to the technical field of porous materials. The preparation method of the defective zirconium-based MOFs specifically comprises the following steps: dissolving ZrCl4 and a ligand 4, 4 '-diphenyldicarboxylic acid in N, N-dimethylformamide, then adding an acetic acid regulator, obtaining a crude product d-UiO-67-X through a solvothermal method, and carrying out washing, drying and vacuum heating activation on the crude product to obtain the defective zirconium-based metal organic framework material d-UiO-67-X. According to the method disclosed by the invention, the defect d-UiO-67-X is successfully constructed through a modifier-induced defect engineering strategy, and the sizes and chemical properties of pores can be adjusted and the adsorption separation performance of the astaxanthin can be enhanced by controlling the defects, so that the astaxanthin can be effectively and selectively separated from a complex matrix.

The invention discloses a denitrification and deoxidation molecular sieve catalyst for hydrogen purification. The denitrification and deoxidation molecular sieve catalyst is mainly prepared from the following raw materials in percentage by mass: 65-85% of zeolite powder; 10-25% of an adhesive; 5-9% of an auxiliary agent; 5-7% of graphene; 6-12% of a calcium-based compound; the sum of the mass percentages of the components is 100%. The invention also provides a preparation method of the denitrification and deoxidation molecular sieve catalyst for hydrogen purification. The preparation method mainly depends on the mixed sintering action of various materials, and the reaction mechanism is as follows: a calcium base and graphene are subjected to a heating reaction, the thermochemical energy storage action of the calcium base is involved, crystal formation between the calcium base and graphene is promoted, and meanwhile, after the calcium base and a zeolite material are subjected to a heating reaction, crystal formation between the calcium base and the graphene is promoted. The pore structure of the molecular sieve is improved; and the adsorption and desorption capability of the molecular sieve catalyst is improved.

This invention discloses an N,S co-doped ultraporous carbon material, its preparation method, and its applications. The method involves synthesizing a precursor PS-3 via polymerization using 3-cyanopyridine and p-toluenesulfonic acid as raw materials. The precursor PS-3 is then subjected to high-temperature carbonization at different temperatures to obtain the N,S co-doped ultraporous carbon material with pore size. This invention eliminates the activation step, requiring only one reaction step, with mild reaction conditions and simple equipment. The ultraporous pores obtained in this invention have a pore size <0.6 nm, classifying them as ultraporous. This is mainly due to their lack of nitrogen adsorption but high carbon dioxide adsorption, indicating the presence of numerous ultraporous structures with pore sizes around 0.33 nm. The specific pore size and pore area were then determined using 195K carbon dioxide. Testing showed that the material can be used for ethane / ethylene adsorption separation, exhibiting excellent adsorption separation performance and a large adsorption ratio.

The application provides a bimetallic ZIF-8 adsorbent, a preparation method and application thereof, and the preparation method of the bimetallic ZIF-8 adsorbent is that a zinc metal precursor, a cobalt metal precursor and 2-methyl imidazole are fully ball-milled and uniformly mixed in a molar ratio of 1:(0.1-0.9):(2-10), then the uniformly mixed material is put into a reaction kettle, and is reacted at 120-200 DEG C, and then the product after reaction is calcined under air isolation conditions, so that the bimetallic ZIF-8 product is obtained. The preparation method of the bimetallic ZIF-8 adsorbent is simple in process, free of pollution and friendly to the environment. The bimetallic ZIF-8 adsorbent has a large specific surface area and pore volume, is used for separating single branched-chain and double branched-chain (multi branched-chain) alkanes from a C6-C10 isomeric alkane mixture, has a large adsorption amount of single branched-chain alkanes, and can efficiently separate single branched-chain / double branched-chain (multi branched-chain) alkanes.

This invention provides a method for synthesizing and applying modified SSZ-16 zeolite molecular sieve to CO2 adsorption and separation, relating to the field of chemical adsorbent technology. The invention involves mixing a silicon source, an aluminum source, an alkali source, a template agent, and water; crystallizing the resulting initial reaction gel and calcining it, then mixing it with an ammonium chloride solution for ion exchange; and then reacting the resulting ammonium-type SSZ-16 zeolite molecular sieve with a metal cation solution (Li). + Na + K + After ion exchange, the mixture is calcined to obtain modified SSZ-16 zeolite molecular sieve. This invention applies modified SSZ-16 zeolite molecular sieve to the field of selective CO2 adsorption and separation for the first time. The resulting modified SSZ-16 zeolite molecular sieve exhibits excellent CO2 / N2 and CO2 / CH4 gas adsorption and separation performance. In addition, this modified zeolite molecular sieve has the advantages of easy regeneration and excellent structural stability, and has better application prospects compared with other adsorbents.

The application relates to the field of water treatment, and particularly discloses a material membrane and a method for extracting humic acid in leachate. The material membrane comprises, by weight, 10-20 parts of polyvinyl alcohol, 5-10 parts of nano-aluminum oxide, 3-5 parts of mesoporous molecular sieve, 1-3 parts of glycerol and 80-100 parts of deionized water; the preparation method comprises the following steps: uniformly mixing the polyvinyl alcohol, the nano-aluminum oxide, the mesoporous molecular sieve, polyethylene glycol diacrylate and the glycerol, adding the deionized water, stirring and dissolving under the condition of temperature rising to 75-80 DEG C to obtain a mixed solution, pouring the mixed solution into a plane mold, drying and forming the plane mold under the condition of temperature of 50-60 DEG C, and keeping warm for 10-14 hours to obtain the material membrane. The material membrane is used for extracting humic acid in leachate, and has the advantages of reducing the content of humic acid in the leachate.

The utility model relates to a device for purifying and recovering oxygen from ternary positive electrode material sintering tail gas. The device comprises a preprocessor, a heat exchanger I, a buffer tank I, a compressor, a heat exchanger II, a buffer tank II, a recoverer, a pressure equalizing tank, a desorbed gas buffer tank, a product gas buffer tank, a vacuum pump, a program control valve and a regulating valve, the feed gas conveying pipeline is connected with the pretreater, the heat exchanger I, the buffer tank I, the compressor, the heat exchanger II and the buffer tank II in sequence and then is connected with the recoverer; the bottom of the recoverer is respectively connected with a desorbed gas buffer tank and a vacuum pump; and the top of the recoverer is connected with a product gas buffer tank. The device is simple in process, high in oxygen yield, high in automation degree, low in investment, low in operation cost, safe, environment-friendly and energy-saving, oxygen with economic benefits in the sintering tail gas can be recycled, it is ensured that the content of the recycled oxygen is larger than or equal to 99%, and the device can be flexibly adjusted according to production requirements.

The invention belongs to the technical field of metal-organic framework (MOF) crystalline materials and gas adsorption and separation, and relates to a microporous 3D Zr-MOF material and a preparation method and application thereof. The chemical formula of Zr-MOF is {Zr6 (mu3-O) 2.66 (mu3-OH) 5.33 L3 (H2O) 2}, L is an organic ligand formed by removing four protons from H4L, and the structural formula of H4L is as follows: the microporous 3D Zr-MOF material provided by the invention can selectively separate C3H8 / CH4 and C2H6 / CH4 at normal temperature, and has the advantages of good stability, simple preparation method and the like.

This invention discloses a diesel fuel aromatic removal adsorbent, its preparation method, and its application. The main component of the adsorbent is silicon dioxide, which is synthesized through a hydrolysis reaction of organosilanes and alcohols in water. After washing and drying, the adsorbent is formed by rolling to control the particle size and achieve high sphericity. The formed adsorbent is then metal-modified, resulting in a large specific surface area and fast mass transfer rate. It is used to adsorb and separate aromatic components in diesel fuel, exhibiting advantages such as large adsorption capacity and high aromatic selectivity.

The invention provides a preparation method of an alkaline earth metal post-modified covalent organic framework (COF) material and CO2 / N2 separation application thereof. The method is suitable for the technical fields of new material preparation and gas adsorption separation. Alkaline-earth metal ions are introduced into channels of the COF material through a post-modification method, so that a COF pore skeleton is kept, and rich CO2 adsorption sites are provided. The preparation method has the advantages of simple process, short synthesis period, adjustable alkaline earth metal ion concentration and the like. The prepared material shows good CO2 / N2 adsorption separation capability.

The invention provides a preparation method of a cellulose-based ZIFs / GO composite material with a sandwich structure, and relates to the technical field of adsorption material preparation. The method comprises the following steps: by taking graphene oxide with polyhydroxy and carboxyl as a carrier, firstly complexing metal ions Co < 2 + >, then mixing with a cellulose nanofibril (CNF) dispersion liquid, and mixing with a ligand solution through an in-situ growth method to prepare a ZIFs / CNF / GO composite material; the ZIF-67 / CNF / GO composite material has the advantages of high adsorption capacity and high repeated utilization rate.

This utility model belongs to the field of coal chemical wastewater pretreatment technology, and discloses a resource substance recovery system for coal chemical wastewater, including an adsorption separation system, an adsorption material regeneration system, and a recovery and regeneration system. The adsorption separation system is used to adsorb and separate resource substances in the wastewater to be treated using adsorption materials. The resource substances in the wastewater to be treated include oils and phenols. The adsorption material regeneration system is used to regenerate the adsorption material using a regeneration solution. The recovery and regeneration system is used to regenerate the regeneration solution and separate and recover the adsorbed resource substances. This utility model achieves efficient separation of oils and phenols by filling the adsorption separation device with adsorption material. The adsorption material regeneration system provides a regeneration solution to the adsorption separation device to achieve elution and regeneration of the adsorption material, thereby realizing the recycling of the adsorption material and effectively reducing the recycling and treatment cost.

The invention provides a super-crosslinked polymer as well as a preparation method and application thereof. The super-crosslinked polymer is prepared from the following raw materials: a combination of a halogen-modified super-crosslinked polymer and ethylenediamine-terminated polyethyleneimine, the halogen-modified super-crosslinked polymer is prepared from the following raw materials: a benzyl dihalide compound. The super-crosslinked polymer provided by the invention can generate electrostatic interaction and hydrogen bonds with glyphosate molecules, so that the super-crosslinked polymer can be used as a glyphosate adsorbent, and has high glyphosate adsorption capacity, rapid adsorption kinetics and excellent cycle performance; in addition, the synthesis raw materials of the super-crosslinked polymer provided by the invention are simple and low in price.

The invention relates to a preparation method and application of an MOFs / MWCNTs composite material adsorbent for CO2 / N2 adsorption separation. According to the method, the high-stability UiO-66-NH2 / MWCNTs composite material is synthesized in situ by adding multi-walled carbon nanotubes (MWCNTs) into the material UiO-66-NH2, and the composite adsorbent is more stable in physical property, higher in adsorption efficiency and better in cycle performance. The UiO series MOFs material selected in the adsorbent disclosed by the invention has good hydrothermal stability, the UiO-66-NH2 / MWCNTs have relatively high BET (Brunauer, Emmett and Teller) surface area and micropore volume, and the adsorbent has good adsorption separation performance.