7results about How to "Loose structure" patented technology

This invention belongs to the field of material surface treatment technology, specifically relating to a wafer polishing slurry, its preparation method, and its application. The wafer polishing slurry comprises abrasives, oxidants, dispersants, surfactants, pH adjusters, and water. The components of the wafer polishing slurry work synergistically, shortening polishing time and improving polishing efficiency when applied to wafer polishing. Furthermore, it significantly improves the surface quality of the polished wafer, markedly reducing scratches and defects, and lowering surface roughness to below 0.15 nm, thus meeting the surface quality requirements of fields such as power electronics and radio frequency devices.

This invention discloses a composite dewatering agent for sludge dewatering in wastewater treatment and its preparation method, belonging to the field of sludge treatment technology. The composite dewatering agent comprises, by weight, the following raw materials: 30-50 parts chitosan-acetylcysteine-modified coal gangue, 20-40 parts cationic starch-modified fly ash fiber, and 1-3 parts nonionic surfactant. The composite dewatering agent of this invention, comprising chitosan-acetylcysteine-modified coal gangue, cationic starch-modified fly ash fiber, and nonionic surfactant, significantly improves the sludge dewatering rate through the synergistic effect of each component, utilizing multiple mechanisms such as charge neutralization, adsorption bridging, and the release of bound water through extracellular polymer destruction. This invention fully utilizes solid waste and natural materials in the preparation of the composite dewatering agent, achieving resource utilization of solid waste while avoiding residual pollution from traditional polyacrylamide flocculants and reducing environmental hazards.

This invention discloses a composite defluoridating agent for deep defluorination of water and its preparation method. The defluoridating agent is an aqueous solution of a metal salt or an aqueous solution of a metal salt dispersed with nanoparticles. The active ingredient of the defluoridating agent contains at least three metal ions: lanthanum, aluminum, and zinc, and the molar ratio of La, Al, and Zn is 1~4:3~5:1~3. The pH of the aqueous solution is 6.0~6.5. Compared with traditional PAC, which requires more than 5 mmol / L to reduce fluoride ions to 1 mg / L, the composite defluoridating agent of this invention only requires 1.2 mmol / L (based on the total concentration of active ingredients) to reduce fluoride ions to below 1.0 mg / L, significantly reducing treatment costs and sludge production. In addition, this invention has a fast settling speed, achieving solid-liquid separation within 10 minutes. In the preferred scheme containing nanoparticles, magnetic adsorption settling can be completed within 5 minutes, greatly shortening the water treatment process cycle.

This invention belongs to the field of reconstituted tobacco technology, and provides a reconstituted tobacco based on a functional compound of Phyllanthus emblica and its preparation method. The reconstituted tobacco includes a porous composite substrate and a coating liquid. The Phyllanthus emblica functional compound includes Phyllanthus emblica pomace pulp and Phyllanthus emblica extract. The porous composite substrate is prepared by mixing and molding Phyllanthus emblica pomace pulp and tobacco pulp, wherein the Phyllanthus emblica pomace in the pulp has a porous and loose structure. The coating liquid is prepared by mixing Phyllanthus emblica extract and tobacco concentrate. The reconstituted tobacco prepared by the method of this invention can enhance the fruity sweetness and aroma of the reconstituted tobacco, improve its aroma quality, reduce its irritation, reduce its woody smell, and effectively improve the comfort of the reconstituted tobacco.

The invention belongs to the technical field of membrane separation, and discloses a composite nanofiltration membrane based on bidirectional interfacial polymerization and a preparation method and application thereof, the preparation method comprises the following steps: step 1, loading two-dimensional porous graphene on the upper surface of a porous support membrane to obtain a two-dimensional porous graphene layer / support layer composite membrane; 2, enabling the lower surface of the composite membrane to be in contact with a water-phase amine monomer solution, so that the water-phase solution infiltrates the supporting layer and is diffused upwards to the two-dimensional porous graphene layer; 3, the upper surface of the two-dimensional porous graphene layer makes contact with an organic phase monomer solution, an aqueous phase amine monomer and the organic phase monomer are subjected to an interfacial polymerization reaction in in-plane pore channels of the two-dimensional porous graphene, a porous graphene / polymer separation layer is formed, in-situ shrinkage and packaging of the in-plane pore channels of the two-dimensional porous graphene are achieved, and the composite nanofiltration membrane is obtained. The composite nanofiltration membrane provided by the invention has efficient interception and high permeation flux on antibiotics, and shows good application universality and flexibility.

This invention discloses a method and application for extracting soluble dietary fiber from soybean residue using a pulsed electric field assisted extraction. The method includes dissolving dried, pulverized, and sieved soybean residue powder in distilled water to obtain a soybean residue liquid; subjecting the soybean residue liquid to repeated freeze-thaw cycles followed by pulsed electric field treatment; adding a compound enzyme to the pulsed electric field-treated soybean residue liquid for enzymatic hydrolysis; after enzymatic hydrolysis, inactivating the enzyme, centrifuging to collect the supernatant, and then concentrating, precipitating with alcohol, and freeze-drying the supernatant to obtain soluble dietary fiber from soybean residue. This invention employs a synergistic extraction process of repeated freeze-thaw cycles, followed by a pulsed electric field, and then compound enzymatic hydrolysis, which can effectively improve the extraction rate of soluble dietary fiber from soybean residue. The obtained soluble dietary fiber from soybean residue exhibits excellent antioxidant activity and pancreatic lipase inhibitory activity, while its physicochemical properties are significantly improved, making it suitable for use in functional foods and food additives, with outstanding industrial application value.

This invention discloses a process for preparing modified silica from vanadium ore leaching tailings, belonging to the field of industrial waste treatment and utilization technology. The steps include: (1) non-grinding alkaline leaching of silica: vanadium ore leaching tailings are leached without grinding with sodium hydroxide and water in a certain ratio and then heated for leaching; after cooling, the residue and filtrate are obtained by solid-liquid separation, and the filtrate is water glass; (2) preparation and modification: self-composite electrolyte is added to water glass, and a new combination modifier is added, followed by acid neutralization to produce silica gel precipitate, which is dried and ground to obtain modified silica product; the electrolyte includes 60% to 80% sodium sulfate and 20% to 40% sodium carbonate by mass percentage; the modifier includes 40% to 80% hexadecyltrimethylammonium bromide and 20% to 60% sodium dodecyl sulfate by mass ratio. The process of this invention can turn the vanadium acid leaching tailings from clay vanadium ore into a valuable resource, achieving reduced treatment and resource utilization, while also producing high-quality silica products.