30results about How to "Improve adsorption and separation efficiency" patented technology

The invention discloses special activated carbon for adsorption separation of chlorine gas and oxygen. A product is prepared from activated carbon by the processes of dipping, drying and baking for decomposing in sequence. The special activated carbon has the physical properties that the bulk density is 0.40-0.45 kg / L, the strength is greater than or equal to 5.5N / mm, the specific surface is greater than or equal to 900m<2> / g, the pore volume is 0.9-1.0 ml / g, and the abrasion is smaller than or equal to 5%. By virtue of the special activated carbon, the related application performance such as the adsorption and separation efficiency and stability, the compression strength and the abrasion resistance quality uniformity of the chlorine gas and the oxygen are improved, and not only is the purity of the products, namely the chlorine gas and the oxygen, is improved, but also the safe and stable operation of an industrial device is facilitated.

The invention discloses a preparing method of a modified aluminum oxide dehydrant. The preparing method comprises the following steps: uniformly blending alumina gel, silica gel, calcium oxide, zinc oxide and sesbania and carrying out kneading, molding, granulating, primary drying, primary roasting, impregnating, secondary drying and secondary roasting in sequence to prepare finished products, carrying out dehydration process before chlorine and oxygen are separated from the mixed gas generated by catalytic oxidation reaction of hydrogen chloride by using adsorption separation method, the mass ratios of alumina gel to silica gel to calcium oxide to zinc oxide to sesbania are (70-82):(7-14):(0.5-2.0):(5-10):(5-10). In the preparing method, water absorption drying agent which is allowed to be used in chlorine-containing gas with small amount of water, and can form the compound absorption bed layer together with the silica gel, the compound bed absorption agent is arranged at the gas outlet end of the compound absorption bed layer to deeply dry and dehydrate gas.

The invention relates to a magnetic Prussian blue material and its preparation and application of cesium ions. The preparation method comprises the following steps: under the action of a thermal initiator, Fe 3 o 4 Nanoparticles react with pyridine compounds containing carbon-carbon double bonds, unsaturated aromatic hydrocarbons and oil-soluble cross-linking agents in water, and after the reaction is complete, polymer-wrapped magnetic nanoparticles are obtained; the magnetic nanoparticles are mixed with pentacyanide The monoammine ferrite undergoes a ligand exchange reaction to obtain the magnetic Prussian blue-like material. The magnetic Prussian blue-like material of the present invention can be used to adsorb cesium ions in soil, especially clay, and combined with the pretreatment of cationized chitosan on clay, the adsorption efficiency of cesium ions is high, and efficient purification of soil can be realized.

The invention relates to a metal-chelating affinity chromatography medium containing a resistant layer. The preparation method comprises the following steps: by taking macroporous silica microspheresas a core, filling a mixture composed of three components, namely sodium alga acid, chitosan oligosaccharide and silicon nitride, in pore channels of the microspheres, bonding epoxy chloropropane ontothe core surface, connecting the epoxy chloropropane and a ligand, and complexing the ligand and metal ions; and adhering amylose to form the resistant layer on the core surface, wherein a mass ratioof the epoxy chloropropane to the amylose is 1:(4-5). According to the resistant layer, blocking of nonspecific macromolecules is realized, nonspecific adsorption is reduced, and the adsorption and separation efficiency on target micro-molecule polypeptides is improved.

The invention relates to a method for efficiently reducing granularity of a 5A molecular sieve (MS). The method comprises the following steps of: (1) adding a duct proppant to the 5A MS; (2) dispersing the 5A MS in a dispersing agent to prepare an MS suspension; (3) selecting a grinding medium; (4) setting grinder parameters; and (5) adding the MS suspension and the grinding medium to a grinder to be ground. The method has the advantages that under the condition of keeping the adsorption quantity of the 5A MS changeless, the granularity of the MS is reduced, the adsorption cycle of the 5A MS for producing nitrogen through pressure swing adsorption (PSA) is shortened, the yield of high purity nitrogen is obviously increased, and the economic benefits of nitrogen production through PSA of the MS are increased.

The invention relates to methods for preparing and using a sudan red magnetic molecularly imprinted polymer. The methods aim to solve the problems that the conventional separated / purified sudan red I magnetic molecularly imprinted polymer has a 'solution polymerization' phenomenon in the synthesis process and the obtained separated / purified sudan red I magnetic molecularly imprinted polymer has a non-uniform spatial network structure. The preparation method comprises the following steps of: 1, preparation of Fe3O4; 2, preparation of magnetic SiO2; 3, preparation of aminated magnetic SiO2; 4, preparation of initiator / magnetic SiO2; and 5, polymerization reaction. The using method comprises the following steps of: adding the sudan red magnetic molecularly imprinted polymer into a sample solution containing sudan red, and then sequentially performing oscillatory reaction, magnetic separation and elution. The method is mainly used for preparing the sudan red magnetic molecularly imprinted polymer.

The invention belongs to the technical field of plant component extraction, and discloses a method for extracting polyphenols from sugarcane scum. The extraction method is as follows: using sugarcane scum as a raw material, extracting with an ethanol solution under the condition of ultrasonic assistance, adding absolute ethanol to the obtained extract, resting for 12h-48h at 2°C to 5°C, and separating and collecting the upper layer solution; The obtained upper layer solution is concentrated and then adsorbed and eluted by a macroporous resin to obtain a polyphenol eluate; finally, the polyphenol eluate is concentrated and dried to obtain the final product polyphenol. The invention adopts the low-temperature high-concentration alcohol precipitation technology to remove a large amount of macromolecular substances in the extracted filtrate, improves the adsorption and separation efficiency of the macroporous resin to the polyphenol, and can significantly reduce the production cost.

The invention belongs to the field of polymer materials, and relates to a nitrogen-rich porous polymer containing heteroatoms, imines and triazine ring structures and a preparation method. After adding polyamine monomers containing triazine rings and heteroatom structures, aldehyde-based monomers and aprotic organic solvents into the reaction flask replaced with inert gas, the reaction flask was replaced with inert gas for more than two times, and the reactants slowly Raise the temperature to 100°C-210°C and react for 10h-100h. After the reaction, the mixture is suction-filtered, washed with polar aprotic solvent and organic solvent respectively, then filtered and dried to obtain the product. The nitrogen-rich porous polymer prepared by the invention has the characteristics of high specific surface area and high gas adsorption capacity, and has fast and efficient adsorption performance for iodine vapor. At the same time, the polymer involved in the present invention has a simple synthesis method, good thermal stability and chemical stability, meets the requirements of gas adsorption and storage, heterogeneous catalysis, and the like, and has good application prospects.

The invention discloses an automatic-column-mounting continuous-operating in-series macroporous resin adsorption and separation device. The automatic-column-mounting continuous-operating in-series macroporous resin adsorption and separation device comprises an adsorption column and a resolving column. The adsorption column is connected with the resolving column in series. A high-position quantification tank is connected to the top of the adsorption column. An upper sample liquid circulating pump is connected to the lower portion of the adsorption column. A vacuuming opening is formed in the upper portion of the high-position quantification tank, and is used for being connected with a vacuum pump. A water inlet is formed in the upper portion of the high-position quantification tank, and is connected with a high-pressure water pump. The lower portion of the resolving column is connected with an eluent circulating pump and a resin recycling pool. The upper portion of the resin recycling pool is connected with a regenerated liquid circulating pump. The high-position qualification tank is communicated with the resin recycling pool through a connector. The automatic-column-mounting continuous-operating in-series macroporous resin adsorption and separation device has the advantages that the problem of manual column mounting for a long time is solved, manpower is saved, continuous operation in the whole process of adsorption, resolution and regeneration is realized through resin transport, and adsorption and separation efficiency is improved.

The invention provides preparation and application methods of a carbon-nanotube-base magnetic bactericide molecularly-imprinted polymer, relating to preparation and application methods of bactericide molecularly-imprinted polymers. The invention aims to solve the problems of time consuming, high organic solvent consumption and low selectivity in the sample pretreatment technique in the existing bactericide residue analysis, the problem of the solution polymerization phenomenon in the existing bactericide molecularly-imprinted polymer synthesis process, and the problem that the solution separation process needs the vacuum filtration or centrifuging step. The preparation method comprises the following steps: 1. activating carbon nanotubes; 2. hydroxylating the carbon nanotubes; 3. preparing the magnetic carbon nanotubes; 4. preparing the initiator / magnetic carbon nanotubes; and 5. carrying out polymerization reaction. The application method comprises the following steps: adding the carbon-nanotube-base magnetic bactericide molecularly-imprinted polymer into a bactericide-containing sample solution, and sequentially carrying out oscillation, magnetic resolution and elution.