135 results about "Chemical equation" patented technology

The invention discloses a method for using 5-amino-3-cyano-1-(2, 6-dichloro-4-trifluoromethylphenyl)-4-Trifluoromethylthio pyrazole as raw material to generate fipronil via catalysis and oxidation in solvent and sulfate medium. The chemical equation is represented as above. The invention oxidizes sulfate medium to generate fipronil, and the sulfate can be diluted by adding water and be layered to recover. The invention has the advantages of simple process, environment protection, mild reaction conditions and low production cost, with wide industrial application.

The invention relates to a method for preparing the designed herbicide pretilachlor intermediate chloride ether. Under the action of organic amine catalyst, the chloride ether can be obtained by ethylene glycol monopropyl ether and bis (trichloromethyl) hydroxyphenyl in the organic solvent through the following chemical equation: HOC2H4OC3H7+Cl3COCOOCCl3 arrow ClC2H4OC3H7+CO2+HCl. The method replaces the traditional chlorination reagent with the bis (trichloromethyl) hydroxyphenyl, such as, thionly chloride, phosphorus oxychloride and hydrogen chloride, etc., and the potential safety hazard can be eliminated from the process source by using the novel chlorination reagent. Simultaneously, the emissions of pollutants are greatly reduced, and the method is a cleaning process with mild reaction conditions, safe and reliable operating process and high product yield, and has good industrialization implementation value and social economic benefits.

A computer program product for predicting the speed and efficacy of a blood-clotting agent is disclosed. The product comprises a computer usable medium having computer readable program code means embodied in the medium for causing an application program to execute on a computer with a database for storing data therein. The computer readable program code means comprises a first computer readable program code means for causing the computer to enter data into the database from a user interface, a second computer readable program code means for causing the computer to enter chemical equations into the database according to a user's input, a third computer readable program code means for causing the computer to compile differential equations corresponding to the chemical equations, a fourth computer readable program code means for causing the computer to solve the differential equations, and a fifth computer readable program code means for causing the computer to display the results of the solution to the differential equations.

The invention discloses a method for simply preparing vaterite calcium carbonate microspheres. The preparation method comprises the steps of 1, preparing a sericin solution; 2, preparing a sericin solution with a certain concentration as a template regulation system through the dialyzed sericin solution according to the chemical equation shown in the specification, and dropping calcium salt and carbonate which have the same concentration into a reaction system in a certain proportion; 3, agitating the reaction system for a period of time, centrifuging to remove precipitate, and washing with water at three times; 4, drying the CaCO3 precipitate through a drying box after water washing, so as to obtain the finished product of vaterite calcium carbonate microspheres. The granularity of the CaCO3 microspheres is 1 to 1.5 microns; the vaterite calcium crystal form in the obtained material is more than 80%; the natural sericin solution is used as the template regulation system to regulate CaCO3 crystal form.

The invention relates to a method for growing a calcium borate oxysalt crystal with a frequency multiplication effect. The method comprises the following steps of: weighing raw materials according to a stoichiometric ratio of a chemical equation of the calcium borate oxysalt and performing crystal growth by the traditional pulling method, wherein a seed crystal is formed by finding the direction of the maximum nonlinear coefficient of the calcium borate oxysalt crystal which grows in the traditional direction through X-ray diffraction and cutting the crystal along the optimum phase matching direction; conveying the cut seed crystal slowly, vertically and downwards into polycrystal material melt to make the top of the seed crystal contact with the polycrystal material melt; maintaining the seed crystal to grow in the vertical direction of the polycrystal material liquid level of the calcium borate oxysalt; and obtaining the calcium borate oxysalt crystal with the frequency multiplication effect through three technological processes of necking, shouldering and ending. The method avoids the defects of complicated process, low utilization ratio, low properties of devices and the like caused by that the traditional calcium borate oxysalt crystal grows along the b direction. The method has the advantages of high optical homogeneity in the light-transmitting direction and high practical value.

The invention relates to a method for preparing benzene end-capping polyaryletherketone polymers, which belongs to the technical field of high polymer materials. The preparation method comprises the steps as follows: using 4-(p fluorophenyl acyl) biphenyl or 4-(p fluorophenyl acyl) phenyl ether as an end-capping agent, using 4,4'-difluorobenzophenone and a bisphenol monomer as reactants, and using a nucleophilic route to prepare the benzene end-capping polyaryletherketone polymers with glass transition temperature of 147 DEG C and initial thermo-gravimetric temperature above 540 DEG C. Two detailed chemical equations describing the preparation process are attached. With two end-capping monomers having boiling points above 320 DEG C and suitable process conditions, the method for preparing the benzene end-capping polyaryletherketone polymers solves the technical problem caused by the fact that the p fluorophenyl acyl has low boiling point and volatilizes in an end-capping reaction in the prior art, and synthetizes polyaryletherketone with a benzene oxygen end group and polyaryletherketone with a biphenyl end group, so as to meet the requirement of continuous industrial production.

The invention discloses a method for preparing metallic magnesium by carbothermic reduction and a device thereof. The method comprises the following steps: crushing raw materials of calcined dolomite,quartzite and carbonaceous reducing agent and then mixing; pressing the above raw materials into bulk bodies; under a vacuum state, carrying out reduction reaction on the mixed material pressed intobulk bodies according to the chemical equation: 4CaO + 5MgO + 2SiO2 + 5C = 2(2CaO-SiO2)+ 5Mg + 5CO to prepare metallic magnesium, wherein, the raw materials are mixed according to the molar ratio of the reduction reaction, the carbonaceous reducing agent can be graphite, charcoal or coke, and the raw materials also can comprises calcined magnesite or magnesium oxide, at the moment, the calcined dolomite can be replaced by quick lime or calcined limestone. In the method, the CaSi2 production technology principle is introduced, carbonaceous reducing agent is utilized to replace FeSi, thereby greatly reducing production cost, reducing energy consumption, decreasing environmental pollution, and speeding up the preparation speed of metallic magnesium.

The invention relates to a production method of an aromatic compound, in particular to a method for producing trichloromethoxybenzene by using chlorobenzene as solvent. The method comprises the following steps: using anisole as starting raw material and chlorobenzene as solvent to perform photo-chlorination reaction and recycling chlorobenzene to prepare trichloromethoxybenzene. The chemical equation is shown as below. In the method, chlorobenzene is used as the organic solvent of the photo-chlorination reaction for preparing trichloromethoxybenzene; as chlorobenzene is cheaper and can be better used in the photo-chlorination reaction, photo-chlorination reaction can be performed according to a proper molar ratio of chlorobenzene to the raw material anisole in the presence of proper catalyst under proper reaction conditions and trichloromethoxybenzene can be prepared better. Therefore, the method is suitable for industrial large-scale production.

The invention relates to a method for obtaining sulfur from sulfur compounds in a coal chemical plant and an electric power plant. The method comprises the following steps of: (1) dedusting exhaust gas from a coal burning boiler system, and then concentrating the exhaust gas to improve the content of sulfur dioxide in the exhaust gas; (2) heating the concentrated exhaust gas through an exhaust gas preheater, then introducing the exhaust gas into a constant temperature selective reduction reactor, and enabling the exhaust gas to react under the action of a selective reduction catalyst by adding hydrogen as a reducing agent so as to generate elemental sulfur, wherein the chemical equation is H2+SO2=S+H2O (1), and the heat generated by the reaction is taken away by a cooling coil which is arranged in the constant temperature selective reduction reactor to ensure that the temperature in the constant temperature selective reduction reactor is maintained at around 210-240 DEG C; (3) removing liquid sulfur from the exhaust gas subjected to catalytic reduction through a sulfur condenser, and introducing the exhaust gas into a Claus reaction device, wherein the liquid sulfur enters a liquid sulfur tank; and (4) burning the sulfur and sulfide contained in the tail gas passing through the Claus reaction device by using a combustion furnace so as to convert the sulfur and sulfide into sulfur dioxide, delivering the sulfur dioxide into the boiler system to mix with a dedusted process gas, and concentrating the mixture, wherein the gas discharged during concentration is mainly carbon dioxide.

The invention discloses a method for controlling the supply of a desulfurizing agent for a flue gas. The desulfurizing agent is used for generating a chemical reaction with sulfur dioxide in the flue gas for desulfurization. The method comprises the following steps of S100, measuring the instantaneous flow rate of the flue gas and the concentration of the sulfur dioxide in the flue gas through a gas analyzer, multiplying two measured values to obtain the content of the sulfur dioxide in an instantaneous flue gas; S210, calculating the use level of an effective component of the desulfurizing agent, which is needed by an instantaneous chemical reaction, through a desulfurization chemical equation of the desulfurizing agent; S220, calculating the needed use level of the actually used desulfurizing agent by combining the proportion of the effective component of the actually used desulfurizing agent; S310, comparing the use level, which is obtained through calculation and is needed instantaneously, of the desulfurizing agent with the flow rate of the desulfurizing agent supplied in real time by a slurry supply pipeline, and calculating a difference value; S320, controlling the opening of a valve on the desulfurizing agent slurry supply pipeline according to the difference value. The accurate and high-efficiency control of the desulfurizing agent for the flue gas is realized. The invention also discloses a system for controlling the supply of the desulfurizing agent for the flue gas.

The invention discloses a method for preparing sodium chlorite through a comprehensive method chlorine dioxide process. According to the reaction principle, the method includes the steps of firstly, conducting sodium chlorate electrolysis according to the chemical equation NaCl+3H2O->NaClO3+3H2; secondly, conducting hydrochloric acid synthesis according to the chemical equation H2+Cl2->2HCl; thirdly, generating chlorine dioxide according to the chemical equation NaClO3+2HCl->NaCl+ClO2+1/2Cl2+H2O; fourthly, preparing sodium chlorite according to the chemical equation 2ClO2+2NaOH+H2O2->2NaClO2+2H2O+O2. A preparation device mainly comprises an electrolytic cell, a sodium chlorate reactor, a hydrochloric acid synthesis furnace, a reboiler, a chlorine dioxide generator, a chlorine dioxide absorption stripping tower, a chlorine dioxide stripper and a sodium chlorite preparation tower. When sodium chlorite is prepared through the method and the device, the product cost is low, yield is high, no side products are discharged, no waste acid or solid waste is discharged, environment pollution is reduced, and the advantages of being economical and environmentally friendly are achieved.

The invention discloses an inductive coupling type high-frequency electrodeless lamp simulation device and method, which belong to the field of lighting engineering. The device comprises a data input module, a first data acquisition module, a geometric modeling module, a physical coupling\chemical reaction module, a mesh generation module, a calculating and solving module, a data output module, an environmental factor input module, a second data acquisition module, a parameter optimization device and an optimal value output module. The device is based on mathematical physics, chemical equations and finite element numerical analysis models, multiple physical fields such as electrical, magnetic and plasma fields of a high-frequency electrodeless lamp are built, realized and optimized so as to guide the electrodeless lamp research and development; a mechanism model and a computer are applied to simulate, so that the development cost is lowered, the development period is shortened, the development quality is improved, the whole electrodeless lamp development process is assisted by the computer, the electrodeless lamp development process is improved from imitation, practicality experiment and data accumulation processes, and reliable technical guarantee is provided for the batch production of the electrodeless lamp.

The invention discloses a fuzzy control method for a series selective catalytic reduction system. The method comprises the following steps: step 1, expressing selective catalytic reduction by a state equation according to a chemical equation of the selective catalytic reduction, and establishing a mathematical model; step 2, establishing a control model by virtue of Simulink through adopting the mathematical model established in the step 1; step 3, obtaining a membership function graph, and establishing a fuzzy control method for controlling an ammonia injection amount of a selective catalytic reduction system; and step 4, setting the fuzzy control method established in the step 3 in a fuzzy control module, and running the control model to obtain a simulation result. The method disclosed by the invention is capable of strictly controlling the NH3 injection amount through adopting series SCR and the fuzzy control method to avoid secondary pollution caused by ammonia leakage, and capable of greatly realizing conversion efficiency with high NOX.

The invention provides a PVC rare-earth composite heat stabilizer and a method for making the same. The heat stabilizer is a wool acid metal rare-earth soap stabilizer and has a general chemical equation of xRE.yCa.zZn.(OOCR)n or x'RE.y'Ba.z'Zn.(OOCR)n. The method for making the heat stabilizer comprises the following steps that: sodium hydroxide is dissolved into an ethanol water solution and is stirred as well as is condensed and flowed back, the melting common and braid wool acid is added to adjust the pH value and decrease the temperature; water, chlorination rare-earth salt solution and salt are added in sequence to be pumped, filtered, washed by ethanol and water, dried and grinded into a product. The stabilizer adopts the common and braid wool acid as the raw material, thereby having wide resources, low cost, reasonable and scientific preparation method and great maneuverability; the product is straw yellow powder and has good primary and long-term heat stabilization performance of PVC and good effects in the aspects of material process and mechanical performance, is nontoxic and protects the environment, and can be applied to the processing and forming aspects of PVC water supply and drainage pipes and have evident social and economical benefits.

The invention provides a preparation method of naphthonone and analogues thereof, which is simple in reaction condition, simple in after-treatment, high in yield and low in production cost. According to the preparation method, in the presence of alkali, a compound shown by a general formula (I) reacts with a compound shown by a general formula (II) or (III) at room temperature by taking multi-fluorine alcohol as a solvent to prepare a compound shown by a general formula (IV) or (V), and the chemical equations are shown in the specification, wherein R is H, C1-C4 alkyl, chlorine or bromine, R' is H or C1-C4 alkyl, X is chlorine or bromine, the multi-fluorine alcohol is trifluoro-ethanol or hexafluoro-isopropanol, and the alkali is sodium carbonate, potassium carbonate, trifluoro-ethanol sodium or triethylamine.

The invention provides a method for preparing a cupric nitrate solution, which comprises the following steps: putting metal copper inside a pressure-proof and nitric acid corrosion-resistant container, and introducing industrial pure oxygen to perform the dissolving reaction of metal copper at a reaction temperature of between 20 100 DEG C and 100 DEG C with a reaction pressure between 0.05 MPa and 0.5 MPa. The nitric acid for reaction is between 1 mol/L and 14 mol/L. The amount of copper for reaction is larger than the amount calculated by the chemical equation and the reaction lasts for 1 to 10 hours.

Present invention discloses a modeling method for nutrient content soft measuring based on mix multiple mold type compound fertilizer. Modeling method features 1, whole pattern is mixed model consisting of based on data driven 3 submodel and based on simplify mechanical models 1 submodel, wherein the outputting of data driven submodel used as inputting of based on simplify mechanical models submodel, 2, simplifying mechanical models related model parameter determining method, determining potassium chloride and concentrated sulfuric acid extent of reaction parameter according to chloride ion content and material balance in finished product, 3, method determining (NH4)2HPO4 quality, according to neutralization degree value and measuring method, combining concerned chemical equation to calculate said quality. Said invention has advantages of Said invention has advantages of simple model building, strong explicable ability, high reliability, and fine extrapolate ability.

The invention discloses a chemical treatment method for aging oil. The method specifically comprises the following steps: heating the aging oil to a temperature of 65 DEG C; adding the heated aging oil to a settling tank, and synchronously adding an emulsion breaker, sodium carbonate and oxalic acid to the settling tank, wherein the total weight of the sodium carbonate and the oxalic acid is 3 per mill of the weight of the aging oil, the odium carbonate reacts with the oxalic acid in the settling tank, the chemical equation of the reaction is as the following: Na2CO3+H2C2O4=Na2C2O2+CO2(gas)+H2O. According to the reaction, the stable emulsifying system is destroyed, such that the oil, the water and the impurities in the aging oil can be effectively separated, the mobility of the aging oil can be increased through the generated carbon dioxide. With the present invention, the aging oil having the water content of 40-50% can be dewatered into the aging oil having the water content less than 1.5%, such that the aging oil meets the transportation standard.