6results about How to "Prevent elution" patented technology

The invention relates to a preparation method of a CO2 adsorbent Li4SiO4 ceramic pellet. The method comprises the following steps: S1, mixing lithium orthosilicate (Li4SiO4) powder, LiOHH2O powder, sodium water glass and deionized water to obtain slurry; s2, the slurry is placed in polyethylene glycol, and biscuit pellets are obtained after high-temperature curing; s3, the mixture of the biscuit pellets and polyethylene glycol is placed in a constant-temperature environment for secondary curing, then filtering and ethanol cleaning are conducted, redundant polyethylene glycol on the surfaces of the pellets is removed, and reinforced biscuit pellets are obtained; and S4, drying the reinforced biscuit pellets in the shade, and sintering to obtain the CO2 adsorbent Li4SiO4 ceramic pellets. The invention provides a method for preparing CO2 adsorbent pellets by adopting a suspension curing method, and the porous structure Li4SiO4 ceramic pellets prepared by adopting the method are relatively high in sphericity degree and have good adsorbability on CO2.

The application relates to the technical field of medical devices, in particular to a balloon for vascular access intervention, which comprises an outer catheter, a cleaning pipe and a telescopic hose, one end of the outer catheter is provided with a guide wire connecting port, the cleaning pipe is arranged on the guide wire connecting port, and a guide head is fixedly connected to the end of the outer catheter far from the guide wire connecting port; medicine is smeared into a medicine applying groove, the medicine in the medicine applying groove will be attached to the inner wall of the blood vessel of a patient after the balloon body is inflated, covers the wound, avoids the elution of the medicine when the balloon body moves, and improves the use rate of the medicine.

The invention relates to the technical field of photocatalytic materials, and discloses an aromatic biguanide covalent organic framework material which is obtained by carrying out C-N coupling reaction on an organic framework material containing halogen atoms and an aromatic biguanide compound, wherein the molar ratio of the organic framework material containing halogen atoms to the aromatic biguanide compound is 1: (7.5-15). The covalent organic framework material rich in aromatic biguanidyl is constructed by adopting side chain engineering, drug micropollutants in a water body can be efficiently catalyzed under the irradiation of visible light, meanwhile, in-situ photocatalytic self-cleaning is realized, a degradation product can be effectively separated from pore channels and surfaces of the aromatic biguanidyl covalent organic framework material, active sites are released, and the photocatalytic self-cleaning effect is achieved. The steps of organic solvent elution and the like are avoided, and a certain reference effect is provided for design and development of efficient green photocatalysts.

In catalyst particles (1) including an electrically conductive carrier (2) and metal particles (3) supported by the electrically conductive carrier (2), the metal particles (3) are embedded in a porous inorganic material (4). The catalyst particles (1) containing the porous inorganic material (4) are ionic-liquid-impregnated catalyst particles impregnated with an ionic liquid (5).

This invention discloses a method for preparing a cross-shaped nanostructured PtCu alloy catalyst and its application, belonging to the field of electrocatalysis and fuel cell technology. The method involves sequentially adding an aqueous solution of chloroplatinic acid and a copper chloride solution to a reaction vessel, followed by the addition of a reducing agent and a dispersant. The mixture is then fully dissolved by ultrasound and stirring, and after homogenization, heated under an inert atmosphere. After the reaction, the catalyst is centrifuged, washed, and freeze-dried to obtain a PtCu alloy catalyst with a cross-shaped nanostructure. This invention uses an aqueous phase system, avoiding the use of macromolecular organic solvents, thus fundamentally solving the problems of the synthesized product being easily encapsulated by organic matter and the active sites being difficult to expose in traditional methods. Furthermore, the nanostructured catalyst obtained through aqueous phase synthesis has a clean surface, allowing for full exposure of the catalytic active centers and effective contact with the reactants, thereby significantly improving the electrocatalytic performance of the catalyst.

The invention relates to a device for preparing electronic-grade ethyl lactate and a method for preparing electronic-grade ethyl lactate by using the device. In one embodiment, a method is disclosed. The apparatus for preparing electronic grade ethyl lactate comprises a reactor for preparing crude ethyl lactate by reacting ethanol input through an ethanol delivery line and lactic acid input through a lactic acid delivery line in the presence of an acid catalyst, a lactic acid recovery column for preparing a first mixture by distilling an input crude ethyl lactate and separating lactic acid from the crude ethyl lactate, an initial fluid purification column for preparing a second mixture by distilling the input first mixture and separating ethanol from the first mixture, a product column for preparing a purified product by distilling the input second mixture and removing impurities from the second mixture, and a storage unit for storing the purified product delivered into the storage unit.