51results about How to "Not easy to polymerize" patented technology

The invention provides a method for controlling a low-melting-point inclusion in high-strength low-alloy steel, which comprises the following steps: 1, tapping into a ladle, and adding additives into molten steel in the ladle after the start of tapping, wherein the additives include an iron alloy, aluminum deoxidizer, slow release deoxidizer and lime; 2, performing LF (ladle furnace) refinement in the ladle, wherein the basicity range of slag in the refinement process is 3-6; the refining slag subjected to LF slagging comprises the following components in percentage by mass: 50-65% of CaO, 6-12% of MgO, 13-26% of Al2O3, 9-19% of SiO2 and less than 0.5% of (FeO+MnO); 3, after slagging, blowing Ar gas from the bottom of the ladle, and desulfurizing while strongly stirring; and 4, in the strongly stirring process and the subsequent process, reacting the slag, the molten steel and an inclusion. The invention has the following advantages: favorable deoxidization and desulfurization effect is achieved, and simultaneously, the composition of the non-metallic inclusion in the steel is controlled to be in a high-melting-point region of a CaO-MgO-Al2O3(-SiO2) phase diagram, so that the inclusion is less prone to polymerization, and less deformation is caused in the subsequent rolling process, thereby achieving the purpose of controlling the large strip-shaped inclusion in a high-strength low-alloy steel plate.

The invention discloses Ni / Fe double-metal face-centered cubic crystal nano-particles and a preparing method and application thereof. The liquid phase reduction method is adopted, PVP is used as a stabilizer, NaBH4 is used as a reducing agent, ferrous ions and nickle ions are added step by step for reduction, prepared Ni / Fe double-metal nano-particles are of a regular face-centered cubic structure, particle size distribution is even, particle size is large than the surface area, stability is good, and the polymerism can not easily happen. The prepared nano-particles can effectively catalyze and degrade polychlorinated biphenyl. Needed reaction equipment of the nano-particles is simple, equipment cost is low, the preparation process is high in controllability and simple in operation, the reaction condition is mild, and further industrial production is possible.

The invention relates to the field of analysis, in particular to a method for purifying EPA from fish oil. The method provided by the invention has high selectivity and separation efficiency, and has a good separation effect on EPA, DHA and other impurities; it has certain selective adsorption on unsaturated fatty acids and impurities in fish oil, and has a high sample loading capacity; using organic The mobile phase of solvent or organic solvent / water system, the solvent can be recycled and reused, reducing the cost of industrialization.

The invention discloses a method for producing graphene through vacuum photoelectric reaction. The method comprises the following steps: mixing graphite of 1000 meshes with ionized water, and spraying to the inner side of a glass tube; putting the glass tube into a vacuum furnace, vacuumizing, setting electrodes before and after the vacuum furnace, and electrifying the electrodes for photoelectric hating so as to dry and dehumidify the glass tube; and continuously heating, ensuring that the glass tube is completely vacuumized inside, adding helium and neon simultaneously according to a ratio of 4:6, keeping the glass tube being in a vacuum state, continuously electrifying for oxidation reduction for 3-4 hours, and discharging, thereby obtaining the graphene. As graphene is produced in a novel photoelectric reaction mode, and energy transition of photoelectric atoms is utilized, multi-layer graphene can be reduced; meanwhile, as the reaction does not involve multiple oxidation reductants, the production is clean and non-toxic; and furthermore, multiple glass tubes can be placed into the vacuum furnace for carrying out sufficient and uniform reaction simultaneously in uniform contact, so that the capacity and quality can be greatly improved.

The invention discloses a preparation method of lipophilic hyperbranched molecule modified nanofluid, wherein the nanofluid is composed of a liquid medium and nanoparticles dispersed in the liquid medium. The preparation method comprises the main steps of preparation and dispersion of the nanoparticles. The surface of the nano material is modified by lipophilic hyperbranched molecules. Compared with the prior art, the preparation method has the advantages that the nano particles are dispersed stably without agglomeration, the nano particles are loaded by utilizing the specific dendritic macromolecular structure of the hyperbranched polyethyleneimine grafted by long-chain alkyl acyl chloride, the number-average molecular weight of hyperbranched molecules is distributed between 1000 and 36000. The prepared nano particles are relatively small in particle size, not easy to agglomerate and good in stability. By the addition amount of 0.01%-5%, the nano fluid with good stability and excellent heat-conducting property can be obtained; and the preparation process is controllable, good in repeatability and easy to popularize.

The invention provides a non-phosphorus scale and corrosion inhibitor containing fulvic acid. The non-phosphorus scale and corrosion inhibitor containing fulvic acid is composed of a scale inhibition component, a corrosion inhibition component and deionized water. The scale inhibition component is composed of fulvic acid, a maleic acid-acrylic acid biopolymer and polyaspartic acid. The corrosion inhibition component is composed of zinc sulfate and polyoxyethylene naphthenic acid imidazoline. A preparation method of the non-phosphorus scale and corrosion inhibitor comprises the following steps: adding zinc sulfate into deionized water to obtain a mixture A; adding fulvic acid into the mixture A to obtain a mixture B; successively adding the maleic acid-acrylic acid biopolymer and polyaspartic acid into the mixture B to obtain a mixture C; and finally adding polyoxyethylene naphthenic acid imidazoline into the mixture C to obtain the non-phosphorus scale and corrosion inhibitor. The corrosion inhibitor is phosphorus-free, contains fulvic acid, has good corrosion inhibition property and scale inhibition property and is especially suitable for high-hardness and high-alkalinity water in North China.