30 results about "Mercury nitrate" patented technology

PURPOSE: To provide an apparatus for measuring chemical oxygen demand and a method therefor which generate no measurement errors by halide ions simpler and easy to process without using mercury nitrate, silver nitrate, and the like. CONSTITUTION: According to the method for measuring chemical oxygen demand and the apparatus for carrying out the measurement method, a fixed amount of a sample whose chemical oxygen demand is to be measured is collected. A predetermined amount of sulfuric acid is added to the sample, which is heated under an inert ambience to remove dissolved chloride ions present in the sample as a hydrogen chloride. Then, a fixed amount of an oxidation reagent for oxidizing the sample is added and heated, whereby a substance to be oxidized in the sample is oxidized. The residual oxidation reagent is coulometric titrated by a reagent solution for reduction. An amount of the residual excessive oxidation reagent is measured. An amount of the oxidation reagent consumed for oxidizing the substance to be oxidized of the sample is measured from the fixed amount of the oxidation reagent added beforehand. The chemical oxygen demand is calculated from the volume of the sample, and the measured value of the oxidation reagent consumed for oxidizing the substance to be oxidized in the sample.

The invention discloses a colorimetric and fluorescent double-signal biosensor for detecting Hg<2+>, and a detection method of the biosensor. The colorimetric and fluorescent double-signal biosensor comprises molecular hairpin probes (H1, H2 and H3), auxiliary deoxyribonucleic acid (DNA) and gold nanoparticles. The molecular hairpin probes are fluorescein (FAM)-labeled molecular hairpins. The AuNPs is synthesized by using a method of reducing chloroauric acid by means of sodium citrate. The detection method comprises the steps of dissolving 0.01g of the chloroauric acid in 100mL of ultrapure water, and boiling by reflux heating; adding 2.5mL of a 1wt% sodium citrate solution under the condition of rapidly stirring, carrying out a reaction for 30min, and then cooling to the room temperature to prepare the AuNPs; mixing mercury nitrate with H1, H2 and H3 (30-300 nmol/L) and a Tris-HCl buffer solution of the auxiliary DNA (20-500 nmol/L), carrying out a reaction for 1-5h at the room temperature, then adding the AuNPs, and carrying out a reaction for 5min; detecting respectively by using an ultraviolet-visible spectrophotometer and a fluorimeter. The double-signal biosensor based on the AuNPs and a catalytic hairpin assembly non-enzyme amplification technology is cheap in preparation and high in detection sensitivity, and overcomes the defect of narrow applicability of a single detection mode.

Disclosed are combined removal device and method for sulphur, mercury and nitrate in smoke. The device comprises a sulphur removal system, a combined mercury-nitrate removal system, a mercury ion recovery system, an elementary mercury recovery system, and an oxidant regeneration system. The sulphur removal system is disposed on the lower portion of a column. The combined mercury-nitrate removal system is disposed on the upper portion of the column. The mercury ion recovery system is connected with the bottom of the sulphur removal system. The elementary mercury recovery system is connected with the combined mercury-nitrate removal system. The oxidant regeneration system is connected with the elementary mercury recovery system. The removal method includes smoke purification, mercury atom recovery and chlorine atom recycling. The removal device and method have the advantages that the structure is simple, integrity is high, operational cost is low, materials are recycled, and byproducts can be recycled.

The invention discloses a method for detecting the content of chloride ions in an emulsion, comprising the following steps of: taking an emulsion, adding anhydrous ethanol into the emulsion; adjusting pH of the emulsion to 2.5-3.0 by nitric acid, adding dropwisely diphenylacarbazone as a indicator into the emulsion, carrying out titration by using a mercury nitrate aqueous solution until it becomes stable light claret as a terminal point; and calculating the content of chloride ions C mercury nitrate*V mercury nitrate *M chlorine /V emulsion after titration. With the adoption of the mercury nitrate titration method to replace an original silver nitrate titration method, the method provided by the invention can be used to determine chlorine content in a stable emulsion and a semi-stable emulsion for cold rolling. In comparison with an original method, the method provided by the invention has advantages of simple operation, little time consumption, shortened detection time, little operation error and low cost, and is more beneficial for application.

The present invention relates to a metabolic screening p-hydroxyl phenylalanine urine detection reagent, which is formed by mixing a 0.1-0.15 g/ml mercury sulfate aqueous solution, a 0.5-1 g/ml mercury nitrate aqueous solution, a 0.1-0.2 g/ml nickel nitrate aqueous solution and a 1-2 g/ml selenous acid aqueous solution according to a volume ratio of 1:0.6-1.2:0.8-1.5:0.5-1.0. According to the present invention, the detection reagent has characteristics of strong universality, high sensitivity, good specificity and the like in tumor detection, further has advantages of simple detection process, short detection time and easy result judgment, and is particularly suitable for the large-scale population census and the tumor clinical auxiliary diagnosis and treatment effect dynamic examination.

The invention discloses a preparation method for mongolian medicine vermilion nanometer powder. The method is as follows: mercury nitrate and thioacetamide are used as raw materials for preparation of nanometer mercuric sulfide by using a wet process; a solution with a certain concentration is prepared from the raw materials; the raw materials are rapidly mixed under magnetic stirring, and the solution is uniformly heated until the solution boils so as to prepare nanometer mercuric sulfide powder. According to the invention, environmental pollution in traditional preparation processes for mongolian medicine vermilion is reduced, the process of preparation is more controllable, components are more specific, and quality of different batches of the nanometer powder is stable.

The invention discloses a molecular platform for detecting iodine in different forms by spectrometry and colorimetry as well as a preparation method and application thereof, and relates to a molecularplatform for detecting iodine as well as a preparation method and a detection method thereof. The invention aims to solve the technical problems that the existing iodine detection materials are few in variety, only one form of iodine can be detected, the detection mechanism is single, the detection limit is high, and the detection can be easily interfered by the external environment. The structural formula of the molecular platform is described in the specification. The preparation method of the molecular platform comprises the following steps of: reacting 2-(3-amino-6-hydroxyphenyl) phenanthroimidazole with terephthalaldehyde to obtain an organic compound A, and reacting the organic compound A with mercury nitrate to obtain the molecular platform. The molecular platform can be used for qualitative or quantitative detection of iodide ions, iodine elementary substances or/and iodine vapor in different media. The molecular platform is convenient to use and quick in response, and can beapplied to the field of iodine ion, iodine elementary substance and iodine vapor detection.

The invention provides a method for detecting the content of impurities in titanium sponge. The method comprises the following steps: 1) weighing titanium sponge, and recording the initial mass of thetitanium sponge; 2) wiping the titanium sponge for removing TiCl4, weighing the wiped titanium sponge, and recording the mass; 3) adding ethanol and a catalyst, performing heating to the preset temperature, and measuring the quantity of the generated gas; 4) adding an acid indicator, and performing titration with acid till the end point of titration; 5) performing filtration for removing insoluble substances, and equally dividing the solution into three parts; 6) adding a metal indicator to the first part of the solution, and performing titration with EDTA (Ethylene Diamine Tetraacetic Acid)till the end point of titration; 7) adding mercury nitrate to the second part of the solution, and performing titration; 8) measuring the content of all Ti elements in the third part of the solution;and 9) calculating the content of all impurities according to the consumption of related substances. The method provided by the invention has the advantages that the needed detection equipment is simple, detection steps are simple, and the content of all substances can be obtained by measuring the content of Mg, Cl and Ti.

The invention discloses a photoelectric synergistic catalytic oxidation and wet absorption mercury nitrate integrated removal system and method. The system can simultaneously remove elemental mercury and nitrogen oxide in coal-fired flue gas, and two devices are used for respectively carrying out photoelectric synergistic catalytic oxidation elemental mercury and wet absorption and removal of mercury and nitrogen elements. Atomizing nozzles are arranged in a flue gas pipeline, a hydrogen peroxide solution containing ferrous sulfate hexahydrate is sprayed, elemental mercury is efficiently converted into water-soluble divalent mercury under the action of an electrode plate electric field and an ultraviolet lamp, then the flue gas enters a subsequent wet-process denitrification device. The mercury and nitrogen elements in the flue gas can be absorbed and removed at the same time. The system can be modified on the basis of the existing wet denitrification process, is simple in process flow, low in investment cost and high in removal efficiency, and has relatively high economic value and practical production significance.

A color-changing coating for copper comprises the components in parts by mass as follows: 100 parts of potassium iodide, 15-30 parts of nitric acid, 15-20 parts of cupper nitrate, 15-25 parts of strontium nitrate, 25-45 parts of aluminum nitrate, 10-25 parts of mercury nitrate, 10-20 parts of silver nitrate, 5-10 parts of europium oxide, 10-20 parts of dysprosium oxide, 10-15 parts of ammonium carbonate, 5-10 parts of ammonium bicarbonate, 15-25 parts of sulfur dioxide and 10-20 parts of water. The color-changing coating turns red from orange at the temperature of 35 DEG C, turns orange yellow from red at the temperature of 40 DEG C, turns orange red from orange yellow at the temperature of 45 DEG C and turns brown from orange red at the temperature of 50 DEG C.

The invention discloses a method for analyzing chlorine content in rubber. According to the key technology, an oxygenated combustion device is adopted, and standard operation of analysts is achieved;an ion chromatograph is used for an analysis technology, so that operation steps in a sample analysis process are reduced, and operation is simpler and more convenient and is easy to master; analysiserrors are reduced, the amount of used reagents is small, generated waste liquid is little, a large amount of ethyl alcohol is not used, no characteristic pollutant is generated, particularly, a mercury-containing reagent, namely mercury nitrate, is not used, and it is not required to collect the mercury-containing reagent or treat the mercury-containing reagent by qualified departments. And the difference between two results of parallel determination is not greater than 5% of the average value of the two results, so that the existing technical problems are solved, and the requirement of analyzing and testing the chlorine content in rubber is completely met.

The invention discloses a preparation method of a gold mercury amalgam nano particle with a high catalytic activity and an application thereof. The preparation of the gold mercury amalgam nano particle comprises the following steps: taking sodium citrate as a reducing agent, and synthesizing a gold nano particle by reducing chloroauric acid step by step; physically loading the gold nano particle to a surface of a glassy carbon electrode surface, then taking the glassy carbon electrode as a working electrode, placing the glassy carbon electrode into a mercury nitrate solution, obtaining a glassy carbon electrode of the surface modified gold mercury amalgam nano particle through a cyclic voltammetry, and performing an ultrasonic treatment, then the gold mercury amalgam nano particle can be obtained. The preparation method is simple, low in cost and simple and convenient in operation; the prepared gold mercury amalgam nano particle shows an obvious electrocatalytic activity for oxygen reduction, and has a better stability and a potential application value in fuel cells, environmental catalysis and other aspects.

The invention discloses a method for preparing cuprous oxide and belongs to the technical field of cuprous oxide preparation.The method includes the steps that bottom mud of a metallurgy sewage treatment plant is collected, after the bottom mud is mixed with water and a mercury nitrate solution and centrifuged, supernate containing mercury clostridium is obtained, then a culture solution is prepared from methyl cobalt ammonia, glycine betaine and the like, rocking bed shaking culture is conducted on the culture solution, after standing and filtering are conducted, triphosadenine is added to filtrate and mixed, diethyl ether is added for extraction, formaldehyde is added to extraction liquor, after anaerobic reduction is conducted, the mixture is mixed with copric chloride dihydrate and soaked for a reaction, starch is added for anaerobic fermentation, then aeration is conducted on the mixture, centrifugation is conducted, sediment on the lower layer is taken, and the cuprous oxide is obtained after washing, drying and grinding are conducted.The method has the advantages that the preparation steps are simple, purity of an obtained product is 19.2% or above higher than that of other products, and the particle size is small and uniform; particles are not prone to clustering in the formation process, dispersing performance is high, and the yield is raised by 30-40%.

The invention discloses a synergistic waste mercury regeneration technique and a soaking precipitation pool thereof, and relates to the technical field of ore excavation. The technique comprises the following steps that original waste mercury is collected, and injected into a particulate filter through a corrugated suction pipe, at the moment, particulate impurities on the surface of the original waste mercury are filtered through the particulate filter, and the particulate impurities are discharged into a particulate collection box through a particulate discharge pipe; residual waste mercury in the particulate filter can be discharged into a precipitation pool body, and at the moment, 2% or more of nitric acid is poured into the precipitation pool body through an immersion pipe, so that the waste mercury is soaked in the nitric acid, and meanwhile, the waste mercury reacts with the nitric acid to generate mercuric nitrate; and after mercury nitrate is generated, the mercury nitrate and metal elements in the original waste mercury are subjected to a replacement reaction, mercury in the mercury nitrate is replaced at the moment, and the waste mercury is regenerated at the moment. According to the technique, through the chemical reaction between nitric acid and waste mercury, recycling of waste mercury is achieved, and cost waste is reduced.

A mercury-containing waste catalyst recycling method relates to the technical field of ''three wastes'' treatment and utilization of organic industrial waste mercury catalysts. A waste mercury catalyst undergoes the following three steps for preparation of silver chloride and co-production of mercuric oxide and aluminium nitrate: firstly, sending the waste mercury catalyst into a sealed distillerfor distillation to directly sublimate mercuric chloride into a gas, and cooling to obtain liquid mercuric chloride; then carrying out a reaction between the above mercuric chloride solution and a silver nitrate solution to generate silver chloride precipitate and mercury nitrate mixed solution; carrying out closed suction filtration to obtain a filter cake silver chloride, washing and drying, crushing and packaging to obtain a silver chloride product; processing the clarified mercury nitrate solution; carrying out a reaction between the above mercuric nitrate solution and an aluminium hydroxide emulsion to generate mercuric oxide precipitate and aluminium nitrate mixed solution; filtering to obtain a filter cake mercuric oxide, washing, spin-drying, drying, crushing, and packaging to obtain a mercuric oxide product; and distilling the clarified aluminium nitrate solution, cooling, crystallizing and packaging to obtain an aluminium nitrate crystal product. By the method, the pollutionof the waste mercury catalyst to the environment is effectively prevented, and high economic benefit is generated.

The invention discloses a high-performance tensile nano-modified strong cross membrane and a preparation method thereof. The high-performance tensile nano-modified strong cross membrane comprises zirconium-modified phosphogypsum, a chloroethane cured product, a mercury nitrate solution, a sodium chloride electrolyte, a tackifier, a softener, a coupling agent and rubber. The surface of the zirconium-modified phosphogypsum has a large number of binding sites, so that the adhesion between the cross membrane and a cement base is enhanced, water permeation is prevented, the zirconium-modified phosphogypsum has hygroscopicity, the density is increased after water absorption saturation, permeation of water molecules is prevented, moisture is evaporated after drying, the density is recovered, and the durability is improved. Chloroethane is hydrolyzed to release heat to evaporate moisture and prevent the moisture from damaging the cross membrane, reaction is performed in the reverse direction after moisture evaporation, a large amount of heat is absorbed, heat on a house is taken away, and the inside of the house is cool. When the cross membrane is on fire, mercurous chloride reacts with diluted hydrochloric acid to generate a mercurous chloride film to cover a fire point, mercury ions absorb heat while oxygen is isolated, the temperature is reduced to be lower than the fire point to extinguish fire, and a fire disaster is prevented.