49results about How to "Chemical reaction stability" patented technology

The invention provides a briquette binder and a briquette preparation method based on the binder. The binder comprises 45 to 75 mass percent of humic acid, 8 to 20 mass percent of bentonite, 5 to 18 mass percent of kaolin, 1 to 5 mass percent of quartz sand, 2 to 8 mass percent of quicklime, 0.1 to 2 mass percent of sodium chloride, 0.1 to 2 mass percent of potassium permanganate and 0.05 to 0.1 mass percent of polyacrylamide. The binder has a simple preparation process, low cost, convenient use and no any secondary pollution and is applicable to various types of coal. The process for preparing the briquette by using the binder comprises the following steps of: only making little pretreatment on raw material coal and the binder, mixing the raw material coal and the binder in proportion, adding water into the mixture, uniformly stirring, pressing the mixture into a cylindrical briquette by using a press machine, and air-drying or drying the cylindrical briquette. The briquette prepared by using the binder of the invention has the characteristics of high cold strength, high water resistance, low cost, low ash increment, high thermal strength, high sulfur retention rate and wide source of raw materials.

The invention discloses a production method for dehydroisoandrosterone, which comprises the steps of ketoxime reaction, Bering reaction, hydrolysis reaction, and obtaining a finished product after refining and is characterized in that: in the hydrolysis reaction, potassium carbonate and methanol are used for reacting with a Bering reactant; filtering, crystallization, centrifugalization and drying are carried out to the solution after reaction, thus obtaining the finished product. In the hydrolysis reaction, since the alkalinity of the potassium carbonate is moderate, the reaction has relatively slow speed, stable chemical reaction and little produced heat and is safe. After refining, the melting point, the content and the yield of the product are respectively increased by 2 DEG C, 1.5 percent and 3.4 percent; the color and luster and the appearance of the product are improved; various indexes of the product are placed in the front ranks of the same industry in China; the method is also proved to have safety, effectiveness and quality controllability; meanwhile, the method increases output and lowers production cost, the product quality not only meets the requirements of customers but also increases market competitive power.

The invention discloses a restoration method for eliminating heat treatment deformation of metal internal teeth, which comprises the following steps: performing covering protection on a quenched metal internal teeth workpiece according to required corrosion resistant materials, and only exposing parts needing restoring; contacting the metal internal teeth workpiece after the covering protection with acid corrosive liquid to generate chemical reaction; when the corrosive dissolution amount of the chemical reaction on the parts of the metal internal teeth workpiece needing restoring is equal to the swelling amount of the heat treatment deformation of the metal internal teeth workpiece, taking the metal internal teeth workpiece out; and cleaning the metal internal teeth workpiece, and performing rust-proof treatment. The invention provides a chemical processing method for the metal inner teeth surface with simple process, convenient operation, reasonability and high efficiency, which can quickly solve the problem of shrink deformation of the internal teeth of a metal workpiece after heat treatment without adopting the conventional cutting method.

The invention relates to a polishing solution for chemically mechanically polishing germanium crystal and an application method. The polishing solution comprises a rough polishing solution and a fine polishing solution, wherein the rough polishing solution is mainly prepared from the following raw materials in percentage by weight: 10 to 50% of hydrosol grinding material, 0.2 to 1.5% of an oxidant, 0.5 to 2% of a pH conditioner, 0.2 to 1.5% of a chelating agent, and 0.1 to 1% of a surface active agent, wherein the hydrosol grinding material is 15 to 110nm in particle size and has the concentration being not less than 40wt% (percentage by weight) and hardness being not greater than 7 Mohs; the fine polishing solution is mainly prepared from 0.1 to 0.5% of a surface active agent, and the balance of deionized water. The two-step polishing method is performed for chemical mechanical polishing and comprises two steps of selecting the rough polishing solution and then second the fine polishing solution; the two polishing can be performed through one polishing machine. The polishing solution has the beneficial effect that the problems of low rate, high roughness and pollution of metal ions and particles in chemical mechanical polishing of germanium crystal materials can be solved.

The invention discloses a bottom filling adhesive having good compatibility with scaling powder and a preparation method thereof. The bottom filling adhesive is compounded by, by weight, 5-25 parts of self-synthesized compatible resin, 20-50 parts of epoxy resin, 5-20 parts of thinner, 1-3 parts of coupling agent, 0.1-1 part of dispersant, 35-50 parts of filler and 5-30 parts of curing agent, wherein the self-synthesized compatible resin is compounded by, by weight, 500-700 parts of dimer acid, 140-360 parts of hydroxyl-terminated toughened resin, 1-8 parts of methyl benzenesulfonic acid, 90-190 parts of low-viscosity bifunctional epoxy resin and 0.2-3.0 parts of triphenyl phosphine. Compared with the prior art, the compatibility with scaling powder of the bottom filling adhesive is excellent, the defects formed in the flowing and curing process are decreased, the flowing speed and the curing speed are high, the bottom filling adhesive meets the requirement for high density packaging, an expansion coefficient is small, and the reliability of packaging components is effectively guaranteed.

The present invention relates to a chemiluminescence measurement apparatus and a measurement method that can improve the accuracy of chemiluminescence measurement and stabilize the chemical reaction in a cartridge. The chemiluminescence measurement apparatus includes: a support member configured to support a cartridge for measuring a test substance contained in a specimen by chemiluminescence measurement; a motor configured to rotate the support member so as to rotate the cartridge such that a process required for the chemiluminescence measurement proceeds in the cartridge; and a light receiver configured to receive light generated by chemiluminescence in the cartridge that is supported by the support member rotated by the motor. The cartridge supported by the support member and a light receiving surface of the light receiver are disposed inside a dark space surrounded by a light-shielding portion, and the motor is disposed outside the dark space.

The chemical preparation method for nickel-titanium alloy material, which is characterized in that: 1) covering the non-working position with soft nonmetal material to form protective layer; 2) dipping the alloy piece into reaction solution contained with hydrofluoric acid, nitric acid and water to required degree; 3) taking out and clearing the alloy piece in flowing water; 4) putting the piece in dehydrogenation furnace for one hour at 300Deg. This invention solves the rapid form problem failed by traditional technique.

The invention discloses an automatic continuous feeding method, a flow control valve is opened, and the raw material in a storage bin flows into a storage tank from a connecting pipe. The opening andclosing degree of the flow control valve can be controlled by a control panel. According to different reaction speed and reaction flow rate requirements, the rotation of a motor is controlled by the control panel. The output shaft of the motor rotates and can drive a stopper plate to rotate to lift the stopper plate, and the solid raw material flows out from the gap between the lower edge of the stopper plate and the bottom plate of the storage tank under the action of the height difference between a feeding end and a discharging end to a feeding tank, and is added into a reaction vessel for chemical reaction, and the motor rotation angle is controlled according to different reaction speed and reaction flow rate requirements. The invention can control the flow rate of raw materials by controlling the lifting and lowering of the stopper plate by the control panel, does not need manual handling operation, can improve the working efficiency, can precisely control the amount of added solidraw materials according to the reaction need, can ensure the continuity of filling, and realizes automatic control production.

The invention relates to an electrode material of an alkaline battery. The electrode material comprises an anode, a cathode, a separation plate located between the anode and the cathode, an alkaline electrolyte, an anode current collector and gel; the cathode comprises the following cathodic active materials: manganese dioxide, nickel oxyhydroxide and conductive carbon particles; and the anode comprises zinc or zinc alloy, and graphite.

The invention discloses a method for achieving direct microalloying in a steel material production process. Associated ore is adopted as an original material for material smelting production, main alloy elements are added in a blast furnace ironmaking process, microalloying elements contained in the iron ore concentrate selected from the associated ore are adsorbed and fixed therein, carriers enter molten iron with the microalloying elements under the self gravity and the molten iron scouring effect, and the microalloying elements in the carriers can be reduced to be in the elementary substance state by adding a deoxidizing agent, thereby entering steel materials in a solid solution mode for achieving a microalloying effect. A brand new train of thought is provided for direct microalloying of the microalloying elements in steel material production, the microalloying elements existing in the solid solution mode can be effectively obtained for the materials, and therefore the microalloying effect is achieved. The method has the advantages that the production process is safe, the materials are simple in source and easy to obtain, industrial production is easy to conduct, and resource configuration and utilization are reasonable.

The invention relates to the field of chemical engineering, and particularly relates to a method for refining titanium tetrachloride by removing vanadium through aluminum powder. The method comprises the following steps: removing high-boiling-point impurities from a crude titanium tetrachloride test solution, removing low-boiling-point impurities from the crude titanium tetrachloride test solution, adding aluminum powder and a clear solution into the crude titanium tetrachloride test solution, removing vanadium and aluminum to obtain refined titanium tetrachloride, and settling the residual solution to obtain the clear solution and underflow, wherein the clear solution can be used for removing vanadium and aluminum, and the underflow can be further purified. The method for refining titanium tetrachloride by removing vanadium through aluminum powder is steady in chemical reaction process, high in safety and simplified in procedures, and the amount of the aluminum powder and the amount of vanadium removal residuals can be greatly decreased.

The invention discloses a process for extracting tin from silver separation residues. The process comprises the steps that 1, a proper amount of the silver residues are picked and subjected to crushing treatment, the silver residues obtained after crushing are mixed with a flocculating agent according to the mass ratio of 1: 10 and ground into thick liquid, and the materials are mixed uniformly, so that a mixed solution of the silver residues and water is obtained; 2, the mixed solution of the silver residues and the water is poured into a holding furnace, the temperature is raised to 560-850DEG C, stirring is conducted for 20 minutes, and after stirring is completed, the materials are left standing still for 3-6 hours; and 3, filter treatment is conducted on mixed liquor obtained after stirring is completed in step 2 four times through a high-pressure filter, wherein filtration of the first time is conducted at the speed of 40 m/h. According to the process for extracting the tin fromthe silver separation residues, filtration is conducted multiple times, and it can be guaranteed that impurities in the silver residues are filtered out completely; the purity of an obtained productis improved; meanwhile, under the atmosphere of carbon dioxide, the impurities in the silver residues can be separated out, and the purity of the obtained product is further improved; in addition, under the atmosphere of nitrogen gas, a chemical reaction can take place stably; and the preparation process is simple and low in cost, and the better application prospect is achieved.