10results about How to "Limit migration" patented technology

The application relates to the technical field of catalysts, and discloses a preparation method of a supported phosphine phenol nickel catalyst with a sulfonate functional group and application of the catalyst in olefin polymerization, wherein a sulfonate group (-SO 3‑ ) is permanently covalently combined on an aromatic ring of a phosphine phenol chelate ligand and is supported on the surface of a solid carrier such as silicon dioxide and magnesium oxide through ionic interaction; in a ligand synthesis stage, the sulfonate group is introduced into a ligand skeleton through a concentrated sulfuric acid sulfonation reaction to prepare a sulfonate-containing phosphine phenol ligand; the ligand is reacted with a nickel source to prepare a complex, and the target catalyst is obtained through supporting; the sulfonate group is fixed through a covalent bond, the structural stability of the catalyst is significantly enhanced, and the loss of an active component in a polymerization process is effectively prevented.

The application discloses a carbon-silicon composite catalyst, a preparation method thereof and application of the catalyst in preparation of aromatic hydrocarbons through catalytic pyrolysis of kitchen waste, and belongs to the technical field of solid waste resource utilization and catalytic conversion. The catalyst takes ZSM-5@SBA-15 core-shell structure composite molecular sieve as a carrier, loads nano NiO active components, and coats N-doped carbon layers on the surface. The catalyst is prepared through hydrothermal synthesis of the core-shell carrier, impregnation of the metal loading, and calcination of the carbon layer in an inert atmosphere. The pretreated kitchen waste is mixed with the catalyst, and catalytic pyrolysis is carried out in an inert atmosphere at normal pressure, so that bio-oil rich in aromatic hydrocarbons (BTX) can be prepared with high selectivity. The content of the aromatic hydrocarbons in the obtained bio-oil is greater than or equal to 72%, and the content of BTX in the total aromatic hydrocarbons is greater than or equal to 58%, so that high-quality raw materials can be provided for subsequent preparation of bio-jet fuel components and fine chemicals. The application has simple process, environmental and economic benefits, and wide application prospect.

The invention relates to a trans-solar cell module based on a 1-allyl-3-methylimidazolium hexafluorophosphate perovskite additive and a preparation method of the trans-solar cell module, and relates to the field of solar cells. The perovskite solar module structure sequentially comprises transparent conductive glass, a hole transport layer, a perovskite layer, an electron transport layer and a back electrode layer from bottom to top. An additive with a certain concentration is added into the perovskite layer, the additive is 1-allyl-3-methylimidazolium hexafluorophosphate, and the concentration of the additive is 0.2 mg / ml to 2.0 mg / ml. The crystallization process of the large-area perovskite thin film is optimized through the 1-allyl-3-methylimidazolium hexafluorophosphate additive, the defect concentration of the thin film is reduced, and the performance of the perovskite photovoltaic module is improved.

The invention discloses a nano synergistic modified urea-formaldehyde resin adhesive solid wood composite floor and a preparation method, the composite floor sequentially comprises a protective layer, a solid wood surface layer, a core layer and a bottom layer, and the layers are bonded, compounded and molded through a nano synergistic modified urea-formaldehyde resin adhesive. The nano synergistic modified urea-formaldehyde resin adhesive is prepared from the following raw materials in parts by weight: 100 parts of a urea-formaldehyde resin matrix, 0.5-2 parts of nano titanium dioxide, 3-8 parts of melamine, 0.1-0.3 part of a dispersing agent, 0.8-1.5 parts of a curing agent and 5-15 parts of flour. Nano titanium dioxide in the modified urea-formaldehyde resin adhesive used in the composite floor has an efficient catalytic decomposition effect on free formaldehyde in the urea-formaldehyde resin adhesive, the free formaldehyde can be converted into harmless water and carbon dioxide, the free formaldehyde release amount can be as low as 0.02 mg / m or below through detection and is far superior to the 0.124 mg / m limit value specified by the GB 18580-2025 standard, and the composite floor has the advantages of being environmentally friendly, safe and reliable. And a healthy and safe living environment is provided for consumers. The invention further provides a preparation method of the solid wood composite floor.

The application relates to application of an iron porphyrin compound in preparation of a tumor metastasis inhibiting drug and belongs to the technical field of biological medicines. The iron porphyrin compound of the application inhibits tumor metastasis through a triple synergistic mechanism: first, the non-enzymatic catalysis mode is used to improve the intracellular NAD + level, the tumor cell metabolism is changed from glycolysis to oxidative phosphorylation, and the tumor cell metabolic flexibility is broken; second, keratin and intermediate filament protein overexpression is induced, the cell skeleton mechanical rigidity is enhanced, and the tumor cell deformation and migration are limited; and third, CD8 + T cells and M1 type macrophages are activated, the tissue immune surveillance is strengthened, the whole-chain metastasis process of tumor dissociation, intravasation, circulation survival, extravasation and colonization is blocked from the source, and the tumor metastasis key link is comprehensively inhibited.

This invention discloses a method for preparing highly spherical zirconia microspheres based on a controllable emulsion template method. Using a water-in-oil emulsion as a template, a composite emulsifier of Span-80 and Tween-80 is employed at a mass ratio of 2:1-4:1, a total concentration of 2-3%, and an oil-to-water volume ratio of 3:1-5:1. Uniform and stable emulsion droplets are formed under a stirring intensity of 800-1500 rpm. The emulsion is then cured at a constant temperature of 50-65℃ for 1-3 hours to allow the gel network to form slowly, preventing microsphere shrinkage and cracking. Finally, a three-stage stepped sintering process is used: increasing the temperature at 1-3℃ / min to 300-400℃ and holding for 1-2 hours; increasing the temperature at 2-5℃ / min to 700-800℃ and holding for 1-2 hours; and increasing the temperature at 3-8℃ / min to 1350-1400℃ and holding for 15-30 minutes to inhibit abnormal grain growth and achieve sufficient densification. Through the coordinated control of emulsification, curing and sintering, the prepared zirconia microspheres have excellent sphericity, particle size uniformity, density and mechanical properties, and the process parameters can be adjusted over a wide range, showing good prospects for industrial application.

The invention discloses a safe and non-toxic vulcanization accelerator for rubber and a preparation process thereof, and belongs to the technical field of rubber.The preparation process comprises the steps that a phenolic resin precursor is formed through condensation polymerization and then calcined to form porous carbon microspheres, then the porous carbon microspheres are acidified and then subjected to surface esterification reaction to be grafted with sodium lignin sulfonate, and then a zinc metal framework is formed through hydrothermal coordination; a large number of attachment sites can be provided for molecules of lignin through the space confinement effect of the porous carbon microspheres, the zinc metal framework can be firmly fixed and prevented from being agglomerated by means of subsequent growth of the zinc metal framework through the porous structure, meanwhile, migration of the zinc metal framework in rubber processing is limited, the zinc metal framework can be stably dispersed in a rubber matrix, and the service life of the zinc metal framework is prolonged. The vulcanization reaction is ensured to be synchronously carried out in the rubber, and local over-vulcanization or under-vulcanization is avoided.

This invention discloses a low-glass phase exudation zirconium corundum brick and its preparation method, belonging to the field of refractory material technology. It employs a core-shell dopant as a sintering aid. The core-shell dopant has a core-shell structure with flower-shaped nano-titanium dioxide as the core and calcium oxide as the shell. At high temperatures, the flower-shaped nano-titanium dioxide reacts with calcium oxide to form CaTiO3, which resides in the grain boundary pores, reducing the concentration of calcium oxide. CaTiO3 is less prone to hydration, preventing calcium ions from reacting with water vapor in the air to form calcium hydroxide, thus eliminating the volume expansion caused by hydration. The flower-shaped nano-titanium dioxide of this invention possesses a large specific surface area and a flower-shaped structure, enabling it to exert a template effect and guide the CaAl... 12 O 19 Lamellar crystals grow in a directional manner to avoid disordered growth, CaAl 12 O 19 Lamellar crystals can synergistically improve the mechanical strength and toughness of zirconium corundum bricks through crack deflection and bridging.

This invention relates to a catalyst, its preparation method, and a treatment apparatus and method for cyanide-containing wastewater. The catalyst preparation steps include: mixing a source M, carbon materials, and a hard template agent, followed by drying to obtain a precursor; the precursor is then subjected to microwave pretreatment, pyrolysis, and acid washing to obtain the catalyst; the source M includes organometallic framework compounds containing M and / or organometallic complexes containing M; M includes any one or a combination of at least two of cobalt, iron, copper, or manganese; the hard template agent includes magnesium chloride, calcium carbonate, or silicon dioxide. The catalyst provided by this invention can achieve single-atom dispersion of M. When used in the treatment of cyanide-containing wastewater, it can synergistically work with anaerobic ammonia oxidation to achieve efficient denitrification, and the treatment method can form a closed loop of pollutant self-disposal through "waste-to-waste" treatment.

The application discloses a preparation method of 700MPa girder steel with excellent low-temperature toughness for high-cold regions, and belongs to the technical field of steel metallurgy, and comprises the following steps: S1, selecting a low-carbon mode for converter smelting, suppressing nitrogen increase through top and bottom combined blowing to strengthen the molten pool stirring, performing slag washing when tapping, and forming slag in advance; S2, LF refining, controlling nitrogen under 0.2MPa micro-positive pressure, creating low-melting-point refining slag and extreme desulfurization, removing large-size non-metallic inclusions, and performing modification treatment on residual MnS and Al2O3 by calcium treatment to remove small-size non-metallic inclusions; S3, full-process protection pouring of slab continuous casting, optimizing the electromagnetic stirring of the crystallizer, dynamic soft reduction, and cooling capacity of the secondary cooling zone under the premise of low superheat, and shortening TiN precipitation time; and S4, sequentially performing heating, rough rolling and finish rolling, and performing finish rolling in the austenite region, and rapidly cooling high-temperature austenite by low coiling, so that TiN is precipitated in a finer and more dispersed form.