43results about How to "Effective enrichment and separation" patented technology

The invention relates to a device and method for enriching and separating fluorine-containing polymer emulsion. The device for enriching and separating fluorine-containing polymer emulsion comprises a lower end cover, a feeding pipe, a barrel, a discharge pipe, an upper end cover, an upper end cover shaft seal, a stirring blade, a stirring shaft, an air inlet pipe, a lower end cover shaft sleeve and a fastening component. The device can intensively stir the heated fluorine-containing polymer emulsion which is added with an electrolyte flocculant, hot air is introduced, gas-liquid-solid three-phase foam is formed, and enrichment and separation of fluorine-containing polymers are realized. Compared with the prior art, the device and method for enriching and separating the fluorine-containing polymer emulsion has the advantages that the enrichment and separation of the fluorine-containing polymer can be simply and efficiently completed with low consumption, a load of a subsequent separation process is greatly reduced, and enrichment ratio and recovery rate of solid-phase fluorine-containing polymer in emulsion are more than 98%.

The invention belongs to the non-ferrous metal smelting industry, and in particular relates to a method for enriching and recovering cadmium from a lead smelting system. After the lead concentrate is matched with auxiliary materials and returned low-cadmium fume, it is added to the bottom blowing furnace for desulfurization and smelting lead. Cadmium is cyclically enriched in the form of cadmium sulfate in the electric dust collection soot; when the cadmium content in the electric dust collection soot reaches 5-28%, the cadmium is separated by leaching with water or dilute sulfuric acid, and the leaching solution is replaced with zinc powder to produce cadmium cotton, which is further produced Crude cadmium and refined cadmium are extracted; the solution after replacing cadmium is used as a raw material for the production of nano-zinc oxide, zinc sulfate monohydrate, and zinc sulfate heptahydrate to recover zinc; lead is enriched in the leaching residue during the leaching process, which is convenient to return to the lead system for smelting Recovery; this method adopts bottom blowing smelting technology, while smelting lead, efficiently enriches and transforms cadmium in raw materials into water-soluble cadmium salt, shortens the process flow, and provides conditions for direct enrichment, separation and recovery of lead and cadmium. The dispersion of lead during wet recovery of cadmium is avoided, and the production cost is reduced.

The invention provides a technology for separating lithium isotope through liquid-liquid extraction. Specifically, the technology comprises the steps: continuously performing countercurrent operationon an organic phase and a water phase; making a lithium-containing organic phase passing through a lithium saponification section sequentially pass through an extraction separation C1 section, an extraction separation C2 section and a phase inversion section; making a lithium-containing water phase passing through the phase inversion section sequentially pass through a buffer H2 section, an extraction separation C2 section, an extraction separation C1 section and a buffer H1 section. By means of the buffer H1 section and the buffer H2 section, abundances of a lithium-6 enrichment product P1 and a lithium-7 enrichment product P2 can be conveniently regulated, and two enrichment products to which lithium-6 and lithium-7 are enriched can be obtained simultaneously. The technology disclosed bythe invention has a reasonable concise process design and convenient in operation, can effectively buffer and control flow fluctuation and achieves high-efficiency separation and enrichment of the lithium isotope.

The invention discloses a preparation method of an agarosebonded silica gelhybridized monolithic column. The preparation method comprises the steps that tetramethyl orthosilicate, agarose, polyethylene glycol and urea are mixed under an ice-bath condition to prepare a prepolymerization system by adopting a sol-gel method, then the prepolymerization system is put in a quartz capillary tube to prepare an affinity monolithic column, and finally the affinity monolithic column is subjected to three-step modification to obtain the agarosebonded silica gelhybridized monolithic column containing amide groups on the surface. The preparation method of the agarosebonded silica gelhybridized monolithic column has the advantages of being simple in operation and making the surface of the prepared monolithic column convenient to modify, the problem that an immunoaffinity column using agarose gel as a carrier is not easily stored and easily produces swelling is solved, and the prepared monolithic column has the advantages of being good in mechanical strength, stable in framework structure, good in permeability, uniform in texture, good in hydrophily and reproducibility and the like and has high selectivity and high concentration rate to biomolecule.

The invention relates to a preparation method of a light rare earth ion imprinted mesoporous molecular sieve adsorbent for absorbing and recycling rare earth ion in wastewater. The preparation method comprises the following steps: firstly, taking tetraethyl orthosilicate as a silicon source and preparing a mesoporous molecular sieve precursor suspension; then inducing aminosilane to couple in the mesoporous molecular sieve precursor suspension by using rare earth imprinted ion, and forming a rare earth ion-aminosilane polymer-mesoporous molecular sieve compound; and finally, removing the rare earth ion in the compound and obtaining a rare earth ion imprinted mesoporous molecular sieve adsorbent. Through absorption materials obtained by the preparation method, the maximum absorption and recovery of the rare earth ion can be realized due to a synergistic effect of a high specific surface area of the molecular sieve and a three-dimensional cavity containing a function group which is specifically bonded with the rare earth imprinted ion.

The invention provides a process for extracting and separating lithium isotopes by crown ether. Specifically, a crown ether extraction agent is taken as an organic phase, an organic phase and a waterphase are operated continuously and adversely, the lithium isotopes are extracted and separated on extraction and separation sections C1 and C2, and mass transfer and phase inversion of lithium elements are achieved by upper and lower phase inversion sections. Buffering sections H1 and H2 are adopted, so that abundance of lithium-6 enriched products P1 and lithium-7 enriched products P2 can be adjusted conveniently, and the lithium-6 enriched products and the lithium-7 enriched products can be obtained at the same time. The process has the advantages of high separation coefficient of an extraction system, concise procedure, convenience in operation, capability of buffering and controlling flow fluctuation effectively, and high efficiency in separation and enrichment of the lithium isotopes.

The invention relates to a sulfonation method of natural zeolite for adsorption and recycling of rare earth ions. The method comprises the following steps of firstly, acidizing the natural zeolite, then conducting sulfhydrylation grafting on the surface of the acidized natural zeolite, oxidizing sulfydryl on the surface of the natural zeolite subjected to sulfhydrylation, and finally, acidizing the obtained product in an acidic solution so as to obtain the sulfonated natural zeolite. The sulfonated zeolite not only has the original high specific surface area of the zeolite but also has functional groups with chelation action, and can gather and separate the rare earth ion furthest under the synergistic effect of two different adsorption modes.