7results about How to "Improve enrichment effect" patented technology

According to the ginseng extraction system and method provided by the invention, the dual goals of high purity and high yield of ginsenoside extraction are achieved through raw material adaptive parameter pre-optimization, self-adaptive cascade purification and activity protection, the enrichment effect of high-value monomer saponin is remarkable, and the loss of active ingredients is accurately controlled. According to the application, a detection-decision-regulation full-process closed-loop intelligent control system is constructed, near infrared spectrum rapid screening and HPLC-MS / MS accurate quantitative dual-mode online detection are fused, real-time and accurate monitoring of the saponin content is realized, and off-line detection and artificial experience parameters are not needed; the multi-target central control unit can automatically decide a purification path and process parameters according to detection data, and designs such as membrane pollution on-line monitoring, automatic backwashing and solvent circulating preheating are combined, so that continuous operation of the process is ensured, and production interruption caused by equipment failure and process fluctuation is avoided.

This invention provides an absorbent for capturing carbon dioxide and a method for capturing carbon dioxide. By volume percentage, the absorbent comprises 20-60% glycine salt aqueous solution, 10-50% triethylene glycol monomethyl ether, 5-10% ethylene glycol, and the balance being water. This absorbent combines the advantages of glycine salt systems, such as low volatility, non-toxicity, safety, and better antioxidant degradation resistance, while avoiding the risk of solid precipitates forming after absorption by the glycine salt system, which could cause pipeline blockage.

The invention discloses a preparation method of an ultra-high-sensitivity gold star nanoparticle / MOF-808 SERS (Surface Enhanced Raman Scattering) substrate, which comprises the following steps: firstly, synthesizing sea urchin-shaped gold star nanoparticles (GNS) with a multi-tip structure in the presence of an amphiphilic block copolymer by a seed mediated growth method; then, by taking zirconium oxychloride octahydrate and 1, 3, 5-benzene tricarboxylic acid as precursors, performing hydrothermal reaction to synthesize an MOF-808 metal organic framework carrier; finally, GNS and MOF-808 are combined in a self-assembly mode, and the solid SERS substrate is obtained through ultrasonic loading, centrifugation, freeze drying and grinding. The method is simple and convenient in preparation process and low in cost, and the prepared substrate is high in uniformity, good in signal reproducibility and high in sensitivity and shows excellent structural stability. Wherein the multi-tip structure of the sea urchin-shaped aventuris effectively enhances a local electromagnetic field, and the SERS detection sensitivity is remarkably improved.

This invention provides a front-end treatment device for electroplating wastewater contaminated with heavy metals, relating to the field of electroplating wastewater technology. The device includes a first treatment chamber, a transmission chamber, a mounting rod, a permanent magnet, a connecting rod, a second treatment chamber, a connecting pipe, and a stirring assembly. This invention uses neodymium iron boron (NdFeB) permanent magnets as the core element for heavy metal adsorption. These magnets possess extremely strong magnetic adsorption properties, rapidly adsorbing magnetic heavy metal ions such as iron, nickel, and cobalt, as well as pollutants containing magnetic components, from electroplating wastewater. Simultaneously, the permanent magnets are driven by a swing assembly to oscillate reciprocally at an angle of 30–60°. Combined with the opposite polarity of adjacent permanent magnets, a dynamically changing magnetic field environment is formed. This not only expands the magnetic field coverage but also avoids the formation of adsorption saturation regions, significantly improving the capture efficiency of heavy metal ions. The titanium alloy or polyvinyl chloride corrosion-resistant protective shell on the outer surface of the permanent magnets ensures magnetic stability and extends service life, guaranteeing long-term and efficient heavy metal separation.

The application relates to the technical field of new materials, in particular to a preparation method and application of a covalent organic framework nanometer noble metal composite material, which comprises the following steps: monomer dissolving, mixing, centrifugal precipitation, washing and drying, gold-silver ion reaction and composite material dispersion. The preparation method and application of the covalent organic framework nanometer noble metal composite material, the COF-Au@Ag composite material has good adsorption performance and enrichment capacity for new pollutants such as antibiotics and microplastics, and can be used as a surface enhanced Raman substrate to efficiently enrich and sensitively detect trace antibiotics and microplastics in complex plant samples.

This invention discloses a covalent organic framework composite membrane, its preparation method, and its applications, belonging to the fields of materials chemistry and analytical chemistry. The covalent organic framework composite membrane comprises a porous polymer substrate membrane, a polydopamine-mediated layer, and a covalently bonded functional layer. The functional layer is formed by linking 2,5-dihydroxy-1,4-phenylenedialdehyde and 5',5''-bis(4-aminophenyl)-[1,1':3',1'':3'',1'''-tetraphenyl]-4,4'''-diamine via imine bonds. This invention achieves controllable and robust growth of a novel COF on the surface of an inert polymer membrane through a "polydopamine-mediated layer + aldehyde pre-anchoring" strategy. As a solid-phase extraction medium, the composite membrane exhibits excellent enrichment performance and good reusability for trace amounts of carbamate pesticides in food and environmental samples, and has significant application value in sample pretreatment.

This application belongs to the field of hydrometallurgical technology, specifically relating to an efficient method for recovering molybdenum during the sulfuric acid-enhanced decomposition of tungsten ore. The method includes the following steps: S1, obtaining tungsten ore, mixing it with concentrated sulfuric acid, and roasting it to obtain a roasting product. The roasting product, by mass percentage, includes: WO3: 10%-60%, Mo: 0.01%-5%; S2, mixing the roasting product with acidic washing liquid to obtain a first mixture. Under stirring conditions, a selective complexing agent is added to the first mixture to induce a complexation reaction, resulting in a second mixture. The second mixture is then subjected to solid-liquid separation to obtain a solid slag and a complexing liquid. The selective complexing agent includes at least one of thiourea and its derivatives or sulfur-containing organic compounds; S3, recovering molybdenum from the complexing liquid. This application, by introducing selective complexation during the washing stage, enriches the complexing liquid with over 98.5% of the molybdenum, while the residual rate of tungsten in the complexing liquid is ≤0.01%, thus solving the problem of molybdenum dispersion and loss in the slag phase and washing water.