50results about How to "Controllable reaction time" patented technology

The invention provides a micro-fluidic chip based on a magnetic fluorescence composite particle. The micro-fluidic chip comprises a chip bottom-layer plate, a chip channel layer and a chip upper-layer cover plate which are sequentially arranged from bottom to top, wherein the chip channel layer comprises a sample introduction area, a sample introduction channel, an optical detection area, a waste liquid channel and a waste liquid storage area which are sequentially connected; a capture recognition reagent is fixed to the lower side of the optical detection area; mark recognition reagent-magnetic fluorescence composite particles are pre-fixed on the inner upper sides of the sample introduction area, the sample introduction channel or the optical detection area. The invention also provides an optical detection device. The micro-fluidic chip provided by the invention can be used for sample trace substance analysis through magnetism enrichment and separation reaction and a fluorescence optical detection technology, meets the requirements on quick, sensitive and convenient detection of low-concentration substances in a micro-sample, solves the problems of complicated and expensive instrument equipment, inconvenience, slow detection speed and the like of an existing method, and has a favorable application value in the POCT (Point-of-Care Testing) detection field.

The invention discloses a modified coal pitch material as well as a preparation method and an application thereof. The modified coal pitch material is composed of the following components in parts by weight: 100 parts of raw coal pitch, 100 parts of water, 0.1-1 part of stabilizing agent and 1-20 parts of Fenton reagent. The preparation method comprises the following steps: fully freezing the rawcoal pitch at the brittleness temperature; smashing and screening to obtain coal pitch powder of which the granularity is less than 80 meshes; adding the water and the stabilizing agent; dispersing by virtue of a blender at the revolving speed of 1000-5000 rpm (revolutions per minute) to obtain a suspension, and then controlling the revolving speed at 1000-5000 rpm; dripping the Fenton reagent atconstant temperature, and reacting at room temperature for 30-90 minutes after the Fenton reagent is added to obtain the modified coal pitch. The content of carcinogen benzopyrene in the modified coal pitch prepared by the preparation method at constant temperature is greatly lowered, the coking value is higher, energy is saved, and consumption is reduced. The modified coal pitch material can be used for preparing a magnesia carbon brick binder and a road paving material after being simply processed, thereby avoiding environmental pollution. In addition, the preparation method is simple.

The invention belongs to the field of preparation of negative electrode materials of lithium ion cells, and discloses a high-capacity graphene/ silicone composite negative electrode material and a preparation method. The method specifically comprises the following steps: preparing certain graphene oxide solution by a modified Hummer method; preparing tetraethoxysilane as a silicone source; uniformly mixing the silicone source with the graphene oxide and magnesium powder based on certain ratio; ultrasonically dispersing; drying the mixed solution into powder through a spraying drying device; reducing under high temperature in certain atmosphere; washing with diluted acid and distilled water in a plurality of times; drying; and grinding powder with certain fineness. According to the method,tetraethoxysilane is used as the silicone source which is high in compatibility; the reaction time is controllable; and moreover, silicone can be effectively wrapped with graphene, so that the electricity conductivity of the silicone can be improved; and meanwhile, the silicone expansion in charging and discharging process can be avoided. Therefore, the circulating performance and the multiplyingpower of the cell with the silicone negative electrode material can be improved.

The invention discloses a preparation method of a novel oxycellulose hemostatic product; the preparation method comprises the steps: pre-treating a cellulose product with a sodium hydroxide solution with the concentration of 1%-5%, removing lignin or impurities on a fiber surface, and further carrying out activation treatment on the fiber surface with an alkali solution; after pretreatment and activation, washing with deionized water to be neutral, and air-drying the obtained cellulose product in air to obtain a raw material; taking a sodium hydroxide solution with the concentration of 5%-20% as a solvent, taking the cellulose product with the amount of 3-10% of the sodium hydroxide solution, then adding urea with the amount of 2% of the sodium hydroxide solution and ZnO with the amount of 2% of the sodium hydroxide solution, and implementing other steps. The physical properties of cellulose fibers are directly changed, the porosity of the cellulose product is greatly increased, the specific surface area of the product is increased, the strength of the product is also increased, the crystalline morphology structure of cellulose is improved, and the changes are greatly beneficial for the next step of selective oxidation reaction of the product.

The invention discloses a microwave oven device for pyrolysis and a pyrolysis method thereof. The microwave oven device comprises a microwave oven body and a reaction cavity formed outside the oven body. A closed end cover is arranged on the top of the reaction cavity. Four side face air inlets are distributed in the circumferential wall of the reaction cavity. Four bottom air inlets are formed in the bottom of the reaction cavity. An electric heating device is arranged on the peripheral wall of the reaction cavity. The reaction cavity is connected with the oven body through a movable connecting rod support. According to the requirement of materials to be pyrolyzed, the number of the side face air inlets or the bottom air inlets is selected, a stop button and a start button are pressed, and after a machine body is operated, the upper limit and lower limit of the temperature and power are set. The reaction time is set according to requirements, and after setting is finished, an electric heating button is pressed to insulate the reaction cavity, and when the actually-measured temperature of a thermocouple reaches 300 DEG C, a microwave button is pressed, and whether the stirring function is started or not is selected according to experiment requirements. After pyrolysis of the materials is finished, a microwave oven is automatically stopped.

The invention discloses delaying controlled-release acid for acidizing unblocking, a preparation method of the acid and an acidizing unblocking method. The delaying controlled-release acid is prepared from components in percentage by weight as follows: 5%-20% of propyl propanoate, 2%-8% of isoamyl formate, 2%-8% of methyl formate, 0.006% of carboxylesterase, 0.1%-1% of a discharge aiding agent, 0.5%-3% of ammonium chloride, 0-8% of ammonium hydrogen fluoride and the balance of water. According to the delaying controlled-release acid, an acid producing precursor is formed by propyl propanoate, isoamyl formate and methyl formate and catalyzed under the action of carboxylesterase to generate H<+>, and the reaction time is controllable; H<+> is combined with F<-> in ammonium hydrogen fluoride to generate HF acid, the stratum structure can be effectively improved, and the purpose of unblocking and reconstructing the stratum is achieved on the basis that oil well equipment is free of corrosion.

The invention discloses an inner-circulation supergravity heterogeneous-catalysis hydrogenation unit. The inner-circulation supergravity heterogeneous-catalysis hydrogenation unit is characterized inthat the lateral wall of a shell is provided with a gas inlet, and the upper portion of the shell is provided with a gas outlet; a liquid inlet is arranged below the lateral wall of the shell; a solid-liquid separating device is arranged at a liquid outlet at the bottom of the shell; a rotating part is arranged in the inner cavity of the closed shell of the inner-circulation supergravity heterogeneous-catalysis hydrogenation unit; the rotating part comprises a fixed rotor or a rotor containing filler and a liquid lifter; the upper end of the fixed rotor or the rotor containing filler is connected with a motor located at the upper end of the inner cavity of the inner-circulation supergravity heterogeneous-catalysis hydrogenation unit, and the lower end of the fixed rotor or the rotor containing filler is connected with the liquid lifter; the liquid lifter is used for lifting liquid at the bottom of the inner-circulation supergravity heterogeneous-catalysis hydrogenation unit to a liquiddistributor in the central cavity of the fixed rotor or the rotor containing filler; the a spiral heat exchanging pipe surrounding the liquid lifter is arranged outside the liquid lifter. The invention further discloses a method using the hydrogenation unit to perform heterogeneous-catalysis hydrogenation.

The invention belongs to the technical field of medical treatment sanitation, and particularly relates to a detecting method for accurately and rapidly detecting target superbacteria. According to themethod, floating bacteria in the environment are adopted as a sample collecting object; the method comprises the specific steps of sampling, enriching, screening culture, qualitative or quantitativemeasuring evaluation and the like. By means of the characteristic that phage can split ATP released by bacteria in the survival status so that luciferase catalyzes fluorescein to emit light, the typeor content of 'superbateria' can be visually qualitatively or quantitatively determined; due to the specificity of phage, no isolated culture is needed even in a sample containing mixed bacteria, rapid and accurate detection and determination can be achieved, and therefore the good application value is achieved.

The invention relates to a preparation method of narrow molecular weight distribution polysiloxane. The method is characterized in that extremely narrow molecular weight distribution (Mw/Mn is not greater than 1.2) with the adjustable molecular weight of 3000-30000 is prepared through ring-opening polymerization by changing a feeding ratio of 1,3,5-trivinyl-1,3,5-trimethylcyclotrisiloxane (VD3) to an anionic initiator, adjusting the reaction time and the reaction temperature, controlling the monomer conversion rate and combining the advantages of anionic ring-opening polymerization. The preparation method concretely comprises the following steps: adding 0.5-2.0ml of a solvent monomer VD3 monomer to a 20ml ampule, adding 1.4ml of new distilled tetrahydrofuran, stirring for about 20-30min, allowing the temperature to be constant in an ice water bath, adding 0.1-0.6ml of an n-butyl lithium solution, and precipitating a polymer by using anhydrous cold methanol a predetermined reaction time later. The method is characterized by adjustable monomer-to-initiator feeding ratio, adjustable reaction temperature and controllable reaction time in the anionic ring-opening polymerization process, so extremely narrow molecular weight distribution and adjustable molecular weight polysiloxane can be obtained by controlling the monomer conversion rate.

The invention discloses a method for preparing glyphosate by continuous oxidation. According to a scheme of the invention, the method adopts a microchannel reactor to prepare the glyphosate, and comprises a batching procedure, a microchannel reaction procedure and a crystallization powder preparation procedure. In the microchannel reaction procedure, the feeding speed of oxygen is changed from high to low; a temperature is stabilized at 60 DEG C and then raised to 90 DEG C; and a pressure is changed from positive pressure to negative pressure. The method provided by the invention adopts the microchannel reactor for a reaction; a glyphosate product obtained by using the method provided by the invention has high purity and high yield; and the method can realize precise feeding, has short reaction time, and generates few side reactions.

The invention discloses a novel preparation method of an oxidized regenerated cellulose product, and the method comprises the steps of dipping wood pulp, cotton pulp or bamboo pulp in a sodium hydroxide solution with the concentration of 200-300 g/l at the temperature of 40-60 DEG C for carrying out pretreatment on a cellulose product, squeezing by a presser, crushing, removing impurities on the surfaces of hemicellulose and fiber, and the like, a cellulose solution is first prepared by using wood celluloses, cotton cellulose or bamboo cellulose, so that the crystallization structure of the cellulose is completely destroyed, the surface impurities are removed by reasonably pre-treating the cellulose fiber, the surface of the fiber is activated, the sodium hydroxide solution is adopted as asolvent, carbon disulfide is added for yellowing reaction, the cellulose fiber is rapidly dissolved to obtain a viscous liquid, after the cellulose is fully dissolved into the solution, the compact crystallization structure is fully dissociated, the purity of the obtained cellulose is high by impurity removal, and the product performance is more reliable.

The invention discloses a method for continuously preparing an integral composite sleeper from a controllable polyurethane composite material. The sleeper is obtained by processing the controllable polyurethane composite material, continuous glass fibers, chopped glass fibers and a glass fiber mat, and comprises the following components in percentage by mass: 30%-40% of the controllable polyurethane composite material, 40%-60% of the continuous glass fibers, 5%-20% of the chopped glass fibers and 1%-10% of the glass fiber mat. The method can solve the problems that in the pultrusion and curing process of the polyurethane synthetic sleeper, a product is burnt and cracked, a product with a large cross section size cannot be pultruded, the size of the product cannot be switched at will, continuous automatic production cannot be achieved, the production efficiency is low, the performance of the product is defective due to the fact that early-stage foaming is fast and later-stage curing is slow in the curing and forming process, and an impregnation system cannot fully infiltrate fibers when the number of the fibers is large, it is guaranteed that product is not prone to cracking, the wettability of the polyurethane composite material and the glass fibers is better, and effective adjustment of the size of a mold cavity is achieved.

The invention discloses a method for oxidizing an ammonium sulfite solution by micro-fluid. The method comprises the following steps of: ventilating the oxygen gas containing flow and the ammonium sulfite solution to a micro reactor by adopting oxygen gas-containing flow as gaseous phase and the ammonium sulfite solution as liquid phase, respectively; generating an ammonium sulfate solution by enabling the two phases for oxidation reaction at 40 DEG C to 80 DEG C; and collecting the product at the outlet of the micro reactor and completing the oxidization to the ammonium sulfite solution. According to the method disclosed by the invention, the high-concentration ammonium sulfite solution can be oxidized within a few minutes, wherein the oxidization rate is 80%-95%; and the catalyst is not added, so that the product purity is improved and the cost is reduced. The micro reactor can be used for precisely adjusting the reaction material proportion and sufficiently mixing the reaction materials; the reaction micro tube has an ultrahigh specific surface area and controllable fluidity, so that the reaction temperature and the reaction time can be controlled. Therefore, the reaction time is shortened, and the phenomenon that the oxygenation efficiency is quickly reduced due to high ammonium sulfate concentration in the traditional reaction, and the ph value of the solution is needed to be regulated at any time is avoided.