46results about How to "Wide range of reaction conditions" patented technology

A preparing method for phase transited stored energy microcapsule covered with an organic polymer material adopts the following steps: (1) mixing the 10 weight organic phase transited material and 0.5-2.5 weight nonionic surfactant under the condition of heating and blending; (2) picking the organic polymer material monomer A, B 2-3 weight to add to 40-60 weight water, blending and mixing as the water phase; (3) adding the oil phase to the water phase, blending the material as the creaming liquid at 30-50 centigrade, adding the free radical to the initiator for the poly-reaction 1-8h at 35-90 centigrade; then adjusting the low temperature as blending the material and adding the cross linker, filtering, washing and drying to obtain the finished products. The organic polymer material achieves the phase transited capsule envelopment via the creaming polymer reaction of the wall material; the microcapsule is the spherical; the granule is distributed evenly; the polymer wall material has a stable intensity, great tightness and great mechanical performance.

The invention relates to a method for removing impurities from desulphurization gypsum of a power plant. The invention adopts a reversible conversion principle that dihydrate gypsum can be rapidly dissolved, re-crystallized and converted into alpha-hemihydrate gypsum under the conditions that temperature is higher than or equal to 120 DEG C, pressure is higher than or equal to 0.15MPa, a pH value is 2.5-7 and an additive exists, and the alpha-hemihydrate gypsum can be also rapidly converted into dihydrate gypsum when being cooled in a water environment. The method for removing the impurities from the desulphurization gypsum of the power plant comprises the following steps: sieving a raw material for filtering out large-particle impurities; preparing reaction slurry, and carrying out water type hot pressing reaction, so that dihydrate gypsum is rapidly converted into alpha-hemihydrate gypsum; standing, and cooling, wherein alpha-hemihydrate gypsum in the slurry is converted into relatively large dihydrate gypsum particles; removing impurities to obtain a relatively pure gypsum material; carrying out water filtration to further remove small impurity particles and harmful soluble salt in gypsum; and obtaining slurry and a wet body or drying to obtain powder according to follow-up needs. The method for removing the impurities from the desulphurization gypsum of the power plant can be taken as a gypsum raw material purification process in preparation of calcium sulphate whiskers by virtue of the desulphurization gypsum, and can also be taken as a method for producing high-whiteness gypsum. The method for removing the impurities from the desulphurization gypsum of the power plant is simple, efficient and easy for mass production.

The invention provides a production method of inorganic nanometer light response type self-cleaning polyester fiber, comprising the following steps of: firstly specially producing visible light response type photochemical catalyst and easily-dispersed functional self-cleaning master batch, mixing the specially-produced functional master batch with polyester chip, and producing the inorganic nanometer light response type self-cleaning polyester fiber by a polyester fiber production technology. On the premise that the physical and chemical properties and the spinnability of the conventional fiber are not changed, the inorganic nanometer light response type self-cleaning polyester fiber has the characteristics such as bacteriostasis, air cleaning, self-cleaning function of easily desorbing greasy dirt, wide reaction condition, economical efficiency and the comprehensive treatment on pollutants. The various textiles made from the fiber, such as curtains, tablecloth, sofas, bedclothes and clothes, just like automatically running air cleaners, can be widely used in places such as bedrooms, hotel rooms, hospital wards, office, shopping malls, restaurants, indoor recreation grounds, etc.

The invention belongs to the technical field of graphene preparation, and in particular relates to a graphene material based on a solid state mechanochemical reactor and a preparation method of the graphene material. According to the technical scheme of the invention, a three-dimensional strong shearing structure of the solid state mechanochemical reactor is utilized, a grinding aid is introduced in the graphite grinding process, the grinding aid and the graphite can be subjected to intense mutual friction caused by three-dimensional shearing force initialized by the three-dimensional shearing structure, then graphite can be peeled, and thus single-layer or small-layer graphene can be prepared. The preparation method comprises the following steps of: respectively drying graphite and the grinding aid, adding into a mixing machine, uniformly mixing, transferring into the solid state mechanochemical reactor for grinding, removing the grinding aid and impurity ions, and drying at 60-90 DEG C, thereby obtaining the high-performance graphene material of which the layer number is smaller than 8 and substrate defects are slightly caused. The novel preparation method of the graphene material provided by the invention has the characteristics of simplicity, high efficiency, cleanliness and low cost, the prepared graphene material has small substrate defects, and surface functionalization of graphene can be achieved at one step.

A method of extracting taurine from scallop skirt is provided. The method adopts scallop skirt leftovers as raw materials, and prepares the taurine by steps of cleaning, homogenizing, ultrasonic enzymolysis, enzyme deactivation, decoloring, concentration, cooling and crystallization. The method combines ultrasonic smashing and stepped enzymolysis to prepare the taurine. Cavitation effects and mechanical functions of ultrasonic waves in an extracting solvent can effectively smash cells so that effective components are in an isolated state and are dissolved into the extracting solvent, and can accelerate molecule movements of the extracting solvent so that the extracting solvent and the taurine molecules are brought into rapid contact, dissolved and mixed with each other, taurine digestion is facilitated and the extracting efficiency is increased. The method is mild in reaction conditions, wide in raw material sources, low in cost and simple in operation, can be used for industrial production and has high economic value.

The invention discloses a fiber/nano manganese dioxide composite material and a preparation method and an application thereof. The method comprises the following steps: 1) pretreatment of a fibrous raw material: performing selective oxidation treatment on the fibrous raw material, and washing the fibrous raw material to a neutral state to obtain oxidized fibre; and 2) preparation of the compositematerial: processed the oxidized fiber through dilute acid treatment and washing the material to the neutral state, mixing the material and a Mn2+solution and uniformly stirring the materials, addingan oxidizing agent and reacting the materials, washing the material, and drying the product to obtain the fiber for in-situ growth of nano manganese dioxide. The particle size scope distribution of the nano manganese dioxide particles is narrow, the distribution of the nano manganese dioxide particles on the surface of the fiber is uniform, shedding is difficulty happened, and the obtained producthas the excellent performance of fiber and nano manganese dioxide, can be processed as a wood functional material having decorative performance and functional performance, can perform catalytic purification of formaldehyde in a room without illumination, and enriches an application field of nano manganese dioxide.

The invention relates to a melt/solid state polycondensation preparation method for polylactic acid, which mainly solves the problems of long reaction time, difficult continuous production or high cost in the prior art. The method comprises the following steps of: 1) performing a dehydration oligomerization reaction of lactic acid at the temperature of between 100 and 160 DEG C under the absolute pressure of between 6,000 and 25,000 Pa and under the action of a catalyst A for 0.5 to 5 hours first, and continuing the ehydration oligomerization reaction at the temperature of between of 120 and 180 DEG C under the absolute pressure of between 200 and 1,500 Pa and under the action of the catalyst A for 0.5 to 5 hours to generate a product I; 2) performing a melt polycondensation reaction of the product I at the reaction temperature of between 150 and 200 DEG C under the absolute pressure of between 30 and 600 Pa and under the action of a catalyst B for 0.5 to 15 hours to generate a polylactic acid prepolymer and lactide serving as a by-product, and refluxing the lactide to a reaction mixture at the reflux temperature of between 70 and 95 DEG C; 3) pelletizing the polylactic acid prepolymer obtained in the step 2), and crystallizing in an inertia airflow at the temperature of between 50 and 130 DEG C for 0.5 to 10 hours; and 4) performing a solid state polycondensation reaction of the polylactic acid prepolymer processed in the step 3) in the inertia airflow at the temperature of between 120 and 170 DEG C for 5 to 40 hours to obtain the polylactic acid. The technical scheme of the invention better solves the problem, and can be used for the industrial production of the polylactic acid.

The invention discloses a method for synthesizing a graphene film through chemical reaction. Through a chemical reaction between a gaseous carbon source, a solid carbon source and a liquid carbon source containing carbon elements or the mixed carbon source material of any two or more of the carbon sources and a chemical reacting substance, carbon atoms in the carbon source material are activated and then deposit on a substrate to grow a graphene film. The method disclosed by the invention is characterized in that the method for producing carbon atoms for synthesizing a graphene film is different from conventional methods such as chemical vapor deposition, the carbon source material for synthesizing a graphene film is widely available, and the synthesis of the graphene film is not restricted by the substrate; the structure and size of the grown graphene film are easy to control; and the method is suitable for preparing graphene films in large scale.

The invention belongs to the technical field of compound preparation, particularly relates to a fullerene derivative microflower and further discloses a preparation method of the fullerene derivative microflower. The preparation method is based on the known surfactant assisted self-assembly method in the prior art and is further developed. The stirring condition of a N-methyl-2-(4-dimethyl amidogen) phenyl-3,4-fullerene pyrrolidine carbon tetrachloride solution and a hexadecyl trimethyl ammonium bromide isopropanol solution is optimized, and the obtained N-methyl-2-(4-dimethyl amidogen) phenyl-3,4-fullerene pyrrolidine microflower is of a spherical flower-shaped structure, the spherical flower is composed of curved surface microsheets standing in a mutually-crossed mode, and the microsheets are of a single crystalline structure and are 1-2 micrometers long, 1-2 micrometers high and 10-20 manometers thick.

The invention discloses a preparation method of a metal compound nano-structure thin-film material. The method comprises the following steps: preparing a solution from a strong acidic-weak basic metal salt with hydrolysis ability; putting the solution into a metal substrate which is cleaned in advance; and inducing continuous hydrolysis reaction of metal ions through the metal substrate at a hydrolysis reaction temperature of the metal ions to prepare a multi-metal compound nano-structure thin-film material. The thin-film material can be taken as an electrode material directly or through thermal treatment. According to the preparation method of the metal compound nano-structure thin-film material, a nano-structure thin film can efficiently grow on the surface of the metal substrate through continuous directional self-assembly; the synthesis technology is simple; any strong acid, strong alkali or strong oxidant does not need to be used in the reaction process; the method is environment-friendly; the reaction condition range is wide and the applicable object range is wide; isometric amplification is easy to implement; and a large scale is easy to implement.

The invention provides a preparation method of a heat conduction film. The preparation method comprises the following steps: pre-polymerizing an organic polymer monomer and a radical initiator in an aqueous solution to obtain a first product; adding graphite oxide into the first product, and carrying out dispersion treatment on the graphite oxide to obtain a second product; adding an inorganic acid into the second product to adjust the pH value of the mixed solution to be less than or equal to 3 to flocculate the second product, and separating the obtained flocculate to obtain organic polymermodified graphite oxide precursor slurry; and coating the surface of a base material with the slurry, and drying; after drying, stripping the dried substance on the surface of the base material to obtain a slurry dry film; carrying out heat treatment and reduction treatment on the slurry dry film to obtain a thermal reduction film; heating the thermal reduction film to 1000-1200 DEG C at a first heating rate in an inert atmosphere, heating the thermal reduction film to 2600-3000 DEG C at a second heating rate after heat preservation is completed, and obtaining a high-temperature carbonized film after heat preservation is completed; and carrying out physical shaping treatment on the high-temperature carbonized film to obtain the heat conduction film.

The invention discloses a method for preparing pyrite type iron disulfide by a high-temperature high-pressure one-step chemical method, and belongs to the technical field of functional material preparation. The method mainly comprises the steps: uniformly mixing ferrous sulfide and sulfur powder to obtain a mixture; pressing and molding the mixture to prepare a block; and placing the block formedby powder pressing molding under a high pressure higher than one atmospheric pressure, and carrying out a reaction at a high temperature of higher than 300 DEG C to obtain the pyrite type iron disulfide. The reaction raw materials are easy to obtain and low in price, ferrous sulfide is directly selected as the raw material, the reaction process is simplified, the reaction raw materials and products are solid, intermediate products cannot be discharged into the environment, the anti-interference capacity of a reaction system is high, and reaction conditions are wide and easy to control.