11results about How to "Good response controllability" patented technology

The invention discloses a preparation method of 1-[2-(aminooxy) ethyoxyl] ethylene, which comprises the following steps: taking N-hydroxyphthalimide and 2-chloroethyl vinyl ether as raw materials, and reacting in a reaction solvent under the action of alkali to obtain 2-[2-(ethyleneoxy) ethyoxyl] isoindoline-1, 3-diketone; then, the 2-[2-(ethyleneoxy) ethyoxyl] isoindoline-1, 3-diketone and hydrazine hydrate are subjected to a reaction in a reaction solvent, and 1-[2-(aminooxy) ethyoxyl] ethylene is obtained. According to the preparation method, the reaction controllability is better, low-temperature feeding and room-temperature feeding are not needed, the exothermic effect is not obvious, and the risk of a substrate is lower; according to the preparation method, a highly toxic product methylhydrazine does not need to be used, and hydrazine hydrate is used for replacing conditions, so that the safety is higher; the preparation method is low in raw material cost, simple in process, mild in condition, low in energy consumption, simple in product separation, better in atom economy, convenient to purify and capable of realizing amplified continuous production.

The invention relates to the field of macromolecules, in particular to a polyamide elastomer raw material composition and application thereof, polyamide elastomer and a preparation method thereof. The raw material composition contains polyamide and polyether, wherein at least one end-capping group in the polyamide is an amino-terminated group; at least one end-capping group in the polyether is an ester group. When the raw material composition is used for preparing the polyamide elastomer, the advantages of high reaction speed, high production efficiency and the like are achieved, the reaction controllability is high, the molecular weight of the product is large, and the type, molecular weight and structure of the soft segment can be adjusted according to application requirements, so that the performance of the elastomer is effectively regulated and controlled.

The invention relates to a preparation method and application of 6-methyl-3, 5-dioxocapryloyl coenzyme A. According to the preparation method, 2-methylbutyric acid serves as a starting raw material, the 6-methyl-3, 5-dioxocapryloyl coenzyme A is chemically synthesized through the steps of activation, condensation, coenzyme A coupling and the like, and the structure and purity of the 6-methyl-3, 5-dioxocapryloyl coenzyme A are identified through the technologies of LC-MS / MS, 1HNMR and the like. The nine-carbon coenzyme A is successfully prepared and identified through a chemical synthesis method for the first time, the core problem that an intermediate is unstable and cannot be obtained in vitro is solved, and a stable substrate is provided for in-vitro acyl transfer; the QS-21 in-vitro acyl transfer reaction is realized for the first time, an in-vitro catalytic system of a chemical synthesis intermediate and an insect cell expression enzyme is established, and a foundation is laid for development of a QS-21 total synthesis process.

The invention discloses a process and a device for preparing m-toluic acid and m-phthalic acid through continuous flow selective oxidation of m-xylene, and the process comprises the following steps: pumping m-xylene and a catalyst solution into a first vertical tubular reactor of a single oxidation reaction module, and introducing oxygen or air to carry out single oxidation reaction; after the reaction is finished, high-purity m-toluic acid is obtained through post-treatment, the yield reaches 93% or above, and the product purity reaches 99%; and switching the outlet of the tubular reactor of the mono-oxidation reaction module to the dual-oxidation reaction module, mixing the reaction liquid after the mono-oxidation reaction is finished with a second stream of catalyst solution, feeding the mixture into a second vertical tubular reactor of the dual-oxidation reaction module for dual-oxidation reaction, and after the reaction is finished, carrying out post-treatment to obtain the product isophthalic acid. The yield reaches 95% or above, and the purity reaches 99% or above; the method is high in reaction controllability, short in reaction retention time, stable in product quality, high in production safety, convenient to operate, high in continuous degree and suitable for industrial production.

The invention belongs to the technical field of textile auxiliaries, and particularly discloses a film and a preparation method thereof.The film is prepared from, by mass, 100-120 parts of hydrogenated palm oil; 15 to 30 parts of ethanolamine; 1 to 3 parts of dicyclohexylcarbodiimide; 25 to 40 parts of hexamethylene diisocyanate; 10 to 30 parts of single-terminated hydroxyl methyl silicone oil; 2 to 5 parts of dimethyl sulfate; 5-15 parts of an emulsifier; and 5-10 parts of glacial acetic acid. By adopting the soft sheet and the preparation method thereof, the problems of harsh reaction conditions, poor product uniformity, single hand feeling and low use safety of the soft sheet in the prior art are solved.

The invention discloses end-group carbon functionalized polysiloxane and a preparation method thereof, and belongs to the technical field of organic silicon industry. The preparation method of the carbon-terminated functionalized polysiloxane comprises the following steps: (1) mixing hydroxyl-terminated polysiloxane, chlorosilane and an acid-binding agent, and stirring and reacting under the protection of nitrogen to obtain a reaction solution a; (2) adding an organic solvent into the reaction liquid a, uniformly stirring, adding alkali liquor, and stirring to react until a system is neutral, so as to obtain reaction liquid b; (3) adding a drying agent into the reaction solution b, stirring, drying and filtering to obtain a reaction solution c; and (4) carrying out reduced pressure distillation on the reaction liquid c, and recovering the solvent to obtain the carbon-terminated functionalized polysiloxane. The carbon-terminated polysiloxane is prepared through the reaction of chlorosilane and hydroxyl-terminated polysiloxane, the preparation method is simple, the reaction is economical and efficient, the completely-terminated carbon-terminated polysiloxane can be prepared on a large scale, meanwhile, no waste gas or waste water is generated, and the method is safe and environmentally friendly.

The invention discloses a preparation method of nano tungsten carbide, which comprises the following steps: S1, mixing a tungsten source and carbon black according to a preset proportion, and then drying and sieving to obtain mixed powder; and S2, the mixed powder obtained in the step S1 is subjected to a pressurized reaction, and the nano tungsten carbide powder is obtained. According to the method disclosed by the invention, the nano tungsten carbide is directly obtained through a one-time carbonization process, so that intermediate procedures in an existing solid phase method are simplified, the production cost is effectively reduced, the production period is effectively shortened, and short-process preparation of the high-purity nano tungsten carbide powder is realized. Compared with traditional methods such as a liquid phase method and a gas phase method, the method is low in raw material cost, simple in technological process, good in reaction process controllability and suitable for large-scale production.

The present invention discloses a bionic thermal insulation, noise reduction and fireproofing integrated nanofiber aerogel and a preparation method thereof, and belongs to the technical field of fiber aerogel. The preparation method of the bionic thermal insulation, noise reduction and fireproofing integrated nanofiber aerogel of the present invention comprises the following steps: mixing silica sol and water to obtain a premixed liquid, then adding a hydrophilic colloid and SiO2 nanofibers, mixing evenly, and obtaining a suspension; performing directional freezing on the suspension, and then vacuum drying and sintering to obtain the bionic thermal insulation, noise reduction and fireproofing integrated nanofiber aerogel. The present invention utilizes the property that hydrophilic colloids can gel with the change of temperature, and can quickly solidify to form a high-strength gel during the directional freezing process to solidify the fiber matrix and the infrared sunscreen reinforcing phase, and then removes ice crystals and hydrophilic colloids through freeze drying and high-temperature sintering, thereby solving the sedimentation problem of high-density reactants during the freezing process.

The embodiment of the present application is about an air regeneration system and a control method thereof, which relates to the field of air regeneration technology, and the main purpose is to improve the safety and controllability of potassium superoxide use. The air regeneration system includes: a potassium superoxide agent feeder; a water feeder; a mixed reaction oxygen generator, the feed inlet of the mixed reaction oxygen generator is respectively connected to the discharge port of the potassium superoxide agent feeder and the water feeder; a carbon dioxide absorber, the inlet of the carbon dioxide absorber is respectively connected to the potassium hydroxide solution outlet and the air intake channel of the mixed reaction oxygen generator, and is used to mix the potassium hydroxide solution flowing into the potassium hydroxide solution outlet with the carbon dioxide in the air to remove the carbon dioxide in the air. Compared with the prior art, potassium superoxide can react completely with water, and the oxygen production can be fed with the required mass of potassium superoxide agent and water as needed. The reaction is highly controllable and the reaction is complete, which can improve the safety and controllability of potassium superoxide use.

The invention discloses a preparation method of a sea urchin-shaped titanium niobate electrode material. The preparation method comprises the following steps: dissolving niobium pentachloride in a mixed solution of deionized water and alcohol; and adding a titanium source and a proper amount of hydrofluoric acid, filling the obtained mixed solution into a reaction kettle for heating reaction, cooling, washing, drying and calcining to obtain the sea urchin-shaped titanium niobate electrode material. The electrode material disclosed by the invention has a regular urchin-shaped structure and good dispersity, and shows excellent electrochemical performance when being used as a lithium ion battery negative electrode material.

The invention discloses a preparation method of a high-purity halcinonide intermediate, which comprises the following steps: dissolving 21-hydroxypregna-4, 9 (11), 16-tetraene-3, 20-dione-21-acetate in 30 times of volume of acetone, adding an acidic reagent, cooling to-30 DEG C to 0 DEG C, dropwise adding a potassium permanganate solution, carrying out heat preservation reaction for 1-2 hours, after the reaction is finished, filtering, and drying to obtain the high-purity halcinonide intermediate. Carrying out post-treatment on the obtained crude product to obtain a reaction product D-3; dissolving the D-3 in an organic solvent, and reacting with a bromination reagent in the presence of an acid catalyst to obtain D-4; and dissolving the D-4 in an organic solvent, and reacting with a weak base reagent under the protection of nitrogen to obtain the halcinonide intermediate D-5. The triene acetate (21-hydroxypregna-4, 9 (11), 16-tetraene-3, 20-dione-21-acetate) (D-2) is used as a raw material, the reaction process steps are few, meanwhile, auxiliary materials with high toxicity are not used, the reaction controllability is good, an intermediate and a final product are easy to purify, the purity is high, the product yield is high, the cost is low, and the method is suitable for large-scale production.