6results about How to "Suitable for industrialization" patented technology

This invention relates to the field of high-purity aluminum and aluminum alloy production technology, and particularly to a porous alumina ceramic material, its preparation method, and its application. The material comprises a composite aggregate and an organic binder, wherein the mass ratio of the composite aggregate to the organic binder is 47:3. The composite aggregate comprises 9 wt%–17 wt% inorganic binder and 83 wt%–91 wt% aggregate particles. The inorganic binder comprises: 40 wt%–50 wt% B₂O₃, 20 wt%–29 wt% Al₂O₃, 10 wt%–15 wt% SiO₂, 9.4 wt%–14.4 wt% MgO, 0–0.5 wt% Na₂O, 0–0.5 wt% K₂O, and 0–10 wt% Re₂O₃, where Re is a rare earth element. This method uses corundum or α-Al₂O₃ as a framework and rare earth composite oxides as an inorganic binder. A high-temperature reaction forms sintering necks between the aggregate particles, resulting in a porous alumina ceramic with a bimodal pore distribution. Two different pore sizes are distributed in situ on the surface of the skeleton particles and the sintered neck, achieving a dual-capture filtration effect for aluminum molten inclusions. This solves the problem that filters with large pore sizes cannot simultaneously filter small-grain-sized impurities.

A method for preparing di-(2-hydroxyisopropyl)benzene, a key intermediate of hydroquinone. The method comprises the following steps: (1) reacting diisopropylbenzene and an oxygen-containing gas in the presence of an alkali and an initiator to obtain a liquid containing solid di-(2-hydroxyisopropyl)benzene; (2) separating and purifying the solid di-(2-hydroxyisopropyl)benzene to obtain a di-(2-hydroxyisopropyl)benzene product with a content >99.95%, wherein the initiator includes one or more of azobisisobutyronitrile, diisopropylbenzene dipperoxide, and diisopropylbenzene peroxide, and the alkali includes sodium hydroxide, potassium hydroxide, or a combination thereof, and the oxidation reaction in step (1) is carried out at a temperature of 80-150°C and a pressure of 0.3-1.8 MPa.

The application discloses a purification method of eplerenone, which uses a mixture of alcohol and water as a recrystallization solvent. The technical scheme provided by the application can completely dissolve eplerenone, is friendly to the environment, has low toxicity, has high product yield and purity, has good impurity removal effect, has low dosage, and has a safer refining system, and is more suitable for industrialized and large-scale production.

This invention discloses a method for preparing high-density, large-particle-size spherical alumina powder, belonging to the field of inorganic non-metallic material preparation technology. The method uses industrial aluminum hydroxide or industrial alumina containing a transition phase as raw material. It involves introducing 1-10% α-alumina seed crystals and 1.0-3.0% composite mineralizer (containing boron and fluorine sources) by mass of the raw materials. After mechanical mixing, the mixture is calcined in air at 1350-1550℃ for 2-8 hours. Finally, the mixture is cooled, dispersed, and sieved to obtain the final product. This invention, through the synergistic effect of seed crystals and composite mineralizer, simultaneously achieves α-phase transformation, densification, grain growth, and morphology control of alumina powder under mild calcination conditions. It successfully prepares alumina powder with an α-phase content ≥96%, true density >3.96 g / cm³, median particle size D50 ≥50 μm, and a regular spherical morphology. This method is simple, low-cost, and the product is suitable for high-filling thermally conductive fillers, showing great promise for industrial application.

This invention provides a method for fabricating a flexible perovskite / crystalline silicon tandem solar cell module, mainly comprising: firstly, fabricating several semi-finished crystalline silicon cells; then, back-mounting them to obtain a bottom flexible crystalline silicon cell module; next, fabricating an intermediate connecting layer and a top layer of semi-finished perovskite cells on the bottom flexible crystalline silicon cell module; etching and cutting from top to bottom to obtain several vertically independent and separated perovskite / crystalline silicon tandem cells; finally, encapsulating the module to obtain the flexible perovskite / crystalline silicon tandem solar cell module. This invention integrates the fabrication processes of the bottom cell, the top cell, and the entire module, simplifying the fabrication process and significantly reducing the production cost of the flexible tandem module, making it suitable for industrialization. Furthermore, this invention also discloses a flexible perovskite / crystalline silicon tandem solar cell module fabricated using the above method.

This invention discloses a regagliptin intermediate, its preparation method, and its applications. Specifically, this invention provides a method for preparing the compound shown in Figure 4, comprising the following steps: in the presence of a transaminase and an amino donor, the compound shown in Figure 3 undergoes a transamination reaction to obtain the compound shown in Figure 4, wherein R is H or a C1-C4 alkyl group. This invention employs an enzymatic method for preparing regagliptin, which has low raw material pollution, low cost, and is suitable for industrial application.