33results about How to "High extraction selectivity" patented technology

The invention discloses application of functional ionic liquid and a method of extracting lithium from salt lake brine and belongs to the technical field of extraction. According to the method, an extraction system organic phase comprises the functional ionic liquid which contains amide groups which are interacted with the lithium, so that interference of other ions can be lowered. Compared with the prior art, the extracting method has the characteristics of low cost, simpleness in operation, high extraction efficiency, cleanness, environmental protection and the like and has an important application value.

The invention discloses an extraction method for cooperating with an aluminum-silicon-lithium-gallium combination method in coal ash. The method comprises the steps of aluminum oxide extraction, wherein pre-desiliconization, dissolving-out through a Bayer method, dissolving-out of sub-molten salt, crystallization and separation, desilicication and seed precipitation are conducted; gallium extraction, wherein adsorption, drip washing, concentration and electrolysis are conducted; lithium extraction, wherein purification, adsorption, desorption, concentration and carbonation sedimentation; preparation of calcium silicate products, wherein causticization of desilicication liquid and dealkalization of desilicication residue are conducted. According to the extraction method, aluminum, silicon,lithium and gallium elements in the coal ash are comprehensively extracted through a whole-wet method, substep and stairstep comprehensive utilization of aluminum, silicon, lithium and gallium is achieved, energy consumption is low, the technological process is simple, the extraction rate of aluminum, lithium and gallium is high, the additional value of solid waste is effectively improved, and themethod is a good comprehensive utilization technology for processing the coal ash through a whole-alkali method and is suitable for industrialization popularization.

The invention discloses nucleic acid aptamer-molecular imprinting synergistic recognition magnetic microspheres and a preparation method and application thereof. The nucleic acid aptamer-molecular imprinting synergistic recognition magnetic microspheres disclosed by the invention comprise magnetic microsphere inner cores and nucleic acid aptamer-molecular imprinting synergistic recognition shells;the nucleic acid aptamer-molecular imprinting synergistic recognition shells have molecular imprinting polymer rigid recognition cavities; the molecular imprinting polymer rigid recognition cavitieshave structural stability, difficult deformation and strong specific adsorptivity; and nucleic acid aptamers are not easy to digest.

The invention provides a technology for separating phycocyanin in spirulina by using polyvinyl ether phosphate through two aqueous phase extraction, belonging to the technical field of biochemical separation engineering. The technology comprises the following steps: preparing polyvinyl ether phosphate; carrying out two phase extraction on phycocyanin; concentrating and freeze-drying, thereby obtaining phycocyanin powder, wherein the phycocyanin recovery rate can be 70-85%. The technology has the beneficial effects that the method is simple; the steps of a purification process are simplified by enriching and separating the spirulina broken wall liquid by directly using polyvinyl ether phosphate; the selectivity is high; the spectral purity of phycocyanin obtained through separation is A620/A280 which is greater than 2.5; the powder of fresh or dry spirulina can be adopted as a raw material, thus providing a technical method with the effect of solving the problem of high value and large scale utilization of spirulina resources.

The invention discloses typhonium giganteum supercritical fluid extract with anticancer activity and a preparation method thereof. The extraction method is characterized in that the active ingredients of dry typhonium giganteum tuber powder serving as a raw material are extracted by using a supercritical fluid extraction technique and by regulating the parameters including flow of CO2, temperatures and pressures of an extraction kettle and a separation kettle and the like. The gas chromatography-mass spectrometer analysis on the extract indicates that the extract contains 40.22 percent of beta-sitosterol and 18.45 percent of campesterol. The results of microbiology and test technology (MTT) tests indicate that the typhonium giganteum extract obtained by the method has obvious tumor inhibition activity for cancer cell lines including colorectal cancer HCT-116, ovarian cancer HO-8910, gastric cancer SGC-7901, liver cancer BEL-7402 and liver cancer SMMC-7721. The extraction method has the advantages of high extraction selectivity, high extraction efficiency, high extraction speed, no pollution to extract, simplicity and convenience for operation, environment friendliness and the like. The extraction method disclosed by the invention can be used for extracting the anticancer active components in the typhonium giganteum and can be used an effective means for extracting sterols.

The invention discloses a preparation method and application of aptamer-modified chitosan nano fibers. The preparation method comprises the following steps: (1) preparing a chitosan solution; (2) preparing chitosan nano fibers; (3) chemical immobilization: taking the aptamer solution, adding an EDC/NHS (1-ethyl-3-(3-dimethylaminopropyl)carbodiimide/N-hydroxysuccinimide) solution for activation, adding the chitosan nano fibers obtained in the step (2), and oscillating to react at normal temperature; and (4) after-treatment: carrying out solid-liquid separation on the reaction mixed solution obtained in the step (3) to obtain the aptamer-modified chitosan nano fibers. The aptamer-modified chitosan nano fibers are suitable for high-selectivity separation and enrichment of trace or ultra-trace mycotoxin substances and other substances in the food and environment, and have the advantages of high selectivity, high extraction capacity, high stability and simple preparation process.

The invention relates to a composite extractant used in a metal indium extraction process. The composite extractant is formed by mixing Bis(2-ethylhexyl)phosphate (P204), trioctylphosphine oxide and hexylphosphine oxide mixture liquid (C923) and trialkyphosphine oxides (TRPO) according to certain proportion. After being diluted with sulfonated kerosene, the composite extractant is used as an extractant used for metal indium extraction. The composite extractant has good chemical stability, good selectivity and high indium extraction efficiency which can achieve more than 90%, simultaneously canreduce the extractant emulsification, is easy for re-extraction, and the demand to extraction conditions of a system is not high.

The invention provides an extractant composition. The extractant composition comprises the following components in percentage by mass: 20-40% of a phosphate extractant as shown in a formula 1, 35-50%of C6-C10 monohydric alcohol and the balance of a diluent. The invention further provides a resource utilization method of the iron-containing wastewater, and the extractant composition is used in theresource utilization method. The extractant composition disclosed by the invention does not need to use an organic amine extractant, is simple in extraction system and relatively low in cost, and does not easily generate a third phase even under high-concentration iron, so that the extractant composition can be suitable for extraction treatment of various iron-containing wastewater. The resourceutilization method provided by the invention can effectively extract and separate iron from the iron-containing wastewater for resource utilization, is very suitable for large-scale application, and has important economic and social values;.

The invention discloses a method for acquiring lignin with a high phenolic hydroxyl group content from residues after hemicelluloses degradation conversion. The method comprises the following steps: uniformly mixing water, a polar aprotic solvent of a low melting point and a small amount of an alkali so as to obtain an extraction agent, mixing the extraction agent with lignocelluloses formed afterxylooligosaccharide and xylose are extracted or furfural is prepared, increasing the temperature to 150-180 DEG C, conducting a heat-preservation reaction to extract for 90-180 minutes, rapidly decreasing the temperature to 40 DEG C or lower after the reaction is completed, conducting filtration so as to obtain filtrate, washing filter residues twice to three times by using a same type of the polar aprotic solvent which is free of water or alkali and has a same low melting point, completely combining collected filtrate, recycling an organic solvent through distillation, adding 2-3 times of the volume of water into a residual water phase, adjusting the pH value of the solution to 2.0-3.0 by using sulfuric acid, leaving the solution to stand for 2-4 hours to enable lignin to settle down, and conducting filtration, washing and drying on the product, so as to obtain the lignin. By adopting the method, the extraction rate of the lignin in the residues is up to 75% or greater, the loss rateof cellulose in the residues is less than 17%, and high extraction selectivity is achieved for the lignin.

The invention relates to a separation technology for aqueous two-phase extraction of spirulina phycocyanin from polyvinylether phenylacetamide, and belongs to the technical field of biochemical separation engineering. The separation technology comprises the steps of polyvinylether phenylacetamide preparation; two-phase extraction of phycocyanin; phycocyanin powder obtaining after concentration and freeze drying, wherein the protein recovery rate can reach 70 to 85 percent. The method is simple; spirulina wall breaking liquid is subjected to enrichment and separation by directly using the polyvinylether phenylacetamide; the purification process step is simplified; the selectivity is high; the spectrum purity of the phycocyanin obtained through separation achieves the effect that A620/A280 is greater than 2.5. Raw materials can use fresh spirulina or dry spirulina powder, so that a technology method for realizing high-value large-scale utilization of spirulina resources is provided.

The invention discloses a separation technology for two-aqueous-phase extraction of spirulina phycocyanin through polyvinyl ether ampicillin, and belongs to the technical field of chemical separation engineering. The separation technology comprises the following steps: preparation of the polyvinyl ether ampicillin; two-phase extraction of the phycocyanin; obtaining of phycocyanin powder after concentration and freeze drying, wherein the phycocyanin recycling rate can reach 75 to 95 percent. The method is simple; wall breaking fluid of spirulina is enriched and separated by directly using the polyvinyl ether ampicillin, so that the steps in a purification process are simplified; the selectivity is high; the spectral purity of the phycocyanin obtained by separation is up to A620/A280 greater than 3.5. Fresh spirulina or dry spirulina powder can be used as a raw material, so that a technological method for realizing high-value-scale use of spirulina resources is provided.

The invention relates to a separation technique of Spirulina phycocyanin by polyvinylether aniline double-water-phase extraction, belonging to the technical field of drug separation. The technique comprises the following steps: preparing polyvinylether aniline; carrying out two-phase extraction on phycocyanin; and carrying out concentration and freeze-drying to obtain phycocyanin powder. The protein recovery rate can reach 70-95%. The method is simple: the Spirulina wall breaking solution is directly enriched and separated by using the polyvinylether aniline, thereby simplifying the steps of the purification process. The method has high selectivity; and the spectral purity of the separated phycocyanin reaches A620/A280>3.5. The raw material can adopt Spirulina fresh algae or dry algae powder, thereby providing a high-value large-scale utilization technique of Spirulina resources.