9results about How to "Increase electrophilicity" patented technology

The invention discloses a bio-based isosorbide carbonate plasticizer and a preparation method and application thereof, and relates to the technical field of plastic processing assistants.The preparation method of the bio-based isosorbide carbonate plasticizer comprises the steps that in the atmosphere of protective gas, diester carbonate and isosorbide serve as raw materials to be subjected to transesterification with a catalyst; and after the reaction is completed, carrying out post-treatment to obtain the isosorbide carbonate plasticizer. The isosorbide carbonate plasticizer disclosed by the invention can effectively reduce the melting temperature and melt viscosity of a material, improve the processability of the material, increase the flexibility of the material and improve the optical transmittance of the material. The preparation method disclosed by the invention has the characteristics of being simple in process, green and environment-friendly, easily available in raw materials, easy in catalyst separation and relatively high in product yield, and is an efficient and environment-friendly preparation process of isosorbide carbonate.

The invention provides a carbon monoxide gas-sensitive material as well as a preparation method and application thereof, and belongs to the technical field of gas sensing. The structural formula of the carbon monoxide gas sensitive material is X2Wn-1O3n, X is cadmium or chromium, and n is 2, 3 or 4. The carbon monoxide gas-sensitive material has high sensitivity and selectivity, has good gas-sensitive performance on low-concentration carbon monoxide, reduces the power consumption of a carbon monoxide sensor, and can monitor carbon monoxide leakage for a long time.

The invention belongs to the technical field of catalysts and application thereof, and particularly relates to a preparation method and application of a framework nickel-doped TS-1 type molecular sieve catalyst. According to the method, TS-1 titanium silicalite molecular sieve raw powder prepared from cheap raw materials is adopted as an initial raw material, nickel cations are introduced into a TS-1 molecular sieve framework in a mode of combining nickel ion coordination complexation with tetrapropylammonium hydroxide hydrothermal treatment, and a hollow cavity is formed in a molecular sieve crystal. The protective effect of the complexing agent on nickel ions effectively prevents the nickel ions from forming metal nickel particles in the hydrothermal treatment process; the tetrapropylammonium hydroxide promotes the TS-1 titanium silicalite molecular sieve to be dissolved and recrystallized to form closed or open mesopores, and nickel ions are embedded into a molecular sieve framework. In the prepared nickel-doped TS-1 titanium silicalite molecular sieve, nickel exists in the form of positive ions and partially replaces titanium ions in a framework, so that the charge density around the titanium ions is remarkably reduced, and the surface acidity is weakened.

The present invention discloses a preparation and application of a CuS@NiCo‑LDHs hollow nano-octahedron heterojunction electrocatalyst. The preparation method comprises the following steps: using a Cu2O nano-octahedron as a hard template to undergo a precipitation conversion reaction with a soluble sulfide, growing a CuS shell layer on the surface of the Cu2O nano-octahedron, and obtaining a Cu2O@CuS nano-octahedron core-shell structure intermediate; etching the Cu2O@CuS nano-octahedron core-shell structure intermediate with an inorganic strong acid to remove the Cu2O core to obtain a CuS hollow nano-octahedron; heterogeneously growing a layer of NiCo‑LDHs nanosheets on the surface of the CuS hollow nano-octahedron to obtain the CuS@NiCo‑LDHs hollow nano-octahedron heterojunction electrocatalyst. The preparation method of the present invention is simple, the raw materials are abundant and easy to obtain, the time-consuming cycle is short, the product has high catalytic activity and good stability, and can be used for alkaline electrocatalytic oxygen evolution reaction.

This invention belongs to the field of acyclic compound technology, specifically relating to a method for preparing tert-amyl peroxide. A tert-amyl hydrogen peroxide aqueous solution is added to a solvent and stirred to obtain a mixed solution. Under stirring conditions, p-toluenesulfonic acid and ferric phosphide are added sequentially to the mixed solution. After the addition is complete, stirring continues to produce reaction solution I. Under stirring conditions, acetic anhydride is added to reaction solution I. After the addition is complete, stirring continues to produce reaction solution II. A washing solution is added to reaction solution II, and the mixture is stirred and washed, then separated to obtain crude tert-amyl peroxide. The crude tert-amyl peroxide is washed, dried, and the solvent is removed to obtain tert-amyl peroxide. This invention avoids the problems of large amounts of hydrochloric acid produced by traditional acyl chloride methods and the corrosiveness caused by using sulfuric acid as a catalyst. Furthermore, ferric phosphide is magnetic, allowing for recycling through magnetic separation after the reaction. p-Toluenesulfonic acid can be regenerated through ion exchange resin, significantly reducing production costs.

The invention discloses a preparation method of a CuS (at) NiCo-LDHs hollow nano octahedral heterojunction electrocatalyst and an application of the CuS (at) NiCo-LDHs hollow nano octahedral heterojunction electrocatalyst. The preparation method comprises the following steps: taking a Cu2O nano octahedron as a hard template to generate a precipitation conversion reaction with soluble sulfide, and growing a CuS shell layer on the surface of the Cu2O nano octahedron to obtain a Cu2O coated CuS nano octahedron core-shell structure intermediate; an inorganic strong acid is used for etching the Cu2O coated CuS nano octahedron core-shell structure intermediate, so that a Cu2O core is removed, and a CuS hollow nano octahedron is obtained; and heterogeneously growing a layer of NiCo-LDHs nanosheets on the surface of the CuS hollow nano octahedron to obtain the CuS coated NiCo-LDHs hollow nano octahedron heterojunction electrocatalyst. The preparation method is simple, the raw materials are rich and easy to obtain, the consumed time period is short, and the product is high in catalytic activity and good in stability and can be used for alkaline electro-catalysis oxygen evolution reaction.

The invention discloses a method for preparing monoisopropanolamine, which comprises the following steps: using an aqueous solution of triisopropanolamine as a raw material, mixing with liquid ammonia, and then passing it into a reactor in which an imidization catalyst is loaded on the upper part and a hydrogenation catalyst is loaded on the lower part, and hydrogen is simultaneously passed through for reaction to prepare monoisopropanolamine; the imidization catalyst is a ruthenium / tin catalyst with a Lewis acid-modified porous oxide as a carrier; and the hydrogenation catalyst is a Cu-based catalyst with a pyridine-modified silicon-aluminum molecular sieve as a carrier. The present invention uses an aqueous solution of triisopropanolamine as a raw material, first through the action of an imidization catalyst, converting all C-N bonds into C=N bonds after all the C-N bonds are cracked, and then through the action of a hydrogenation catalyst, a highly selective catalytic generation of monoisopropanolamine can be achieved.

The invention discloses a supported catalyst for the production of high-whiteness decabromodiphenylethane and a preparation process of high-whiteness decabromodiphenylethane, and relates to the technical field of preparing supported catalysts by chemical methods, wherein the supported catalyst comprises a carrier and an active ingredient, wherein the carrier is a modified molecular sieve, the active ingredient comprises an active auxiliary agent, an aluminum salt or a zirconium salt, and the active auxiliary agent is at least one of phosphomolybdic acid or phosphotungstic acid, and the preparation method of the modified molecular sieve comprises the following steps: sintering the molecular sieve at a constant temperature under the condition of 350-450° C., cooling, dispersing in a solvent, adding aminosilane, condensing and refluxing under the condition of 50-70° C., cooling, solid-liquid separation, washing, and drying to obtain the modified molecular sieve. The supported catalyst of the invention has strong stability and long-lasting catalytic activity in the reaction system, is easy to recover and has a high reuse rate, and the decabromodiphenylethane prepared by the supported catalyst has a high yield and whiteness.

The application provides a nitrogen-containing fused aromatic ring compound and an organic electroluminescent device thereof, and relates to the technical field of organic electroluminescent materials. In order to solve the problems existing in the prior art of organic electroluminescent materials and devices, the application provides a nitrogen-containing fused aromatic ring compound, which is applied to an organic electroluminescent device as a host material of an electron transport layer, a hole blocking layer and a light-emitting layer, so that the luminous efficiency, driving voltage and service life of the device can be effectively improved. The novel nitrogen-containing fused aromatic ring organic compound has a high triplet energy level, appropriate HOMO / LUMO energy level, high electron affinity and electron mobility, is conducive to the transmission of electrons, balances the transmission of holes and electrons, and has a high decomposition temperature and glass transition temperature and good film-forming property, so that the stability and high efficiency of the device can be effectively ensured, and the luminous efficiency of the organic electroluminescent device can be significantly improved when the compound is applied to the organic electroluminescent device as a host material of a light-emitting layer.