157 results about "Gas poison" patented technology

A family protective shelter which can be erected quickly inside in a home living room, family room, patio, or on an outside lawn area. This dome tent enclosure is designed of clear plastic sheet material which is impervious to gases used to conduct chemical warfare (such as nerve gas, mustard gas, serin, cyanide, and the like) dispersed biohazard aerosol compounds (such as anthrax, smallpox, polio, bacteria, viruses, or fungi), or other atmospheric toxins, such as those from a nuclear fallout. This protective “pop-up”, external frame enclosure will be sized to house at least two adults comfortably (6×9×7 high inside, up to about 10×18′×7′ high), will incorporate a zip-lock entrance/egress isolation portal chamber, and will communicate to the outside world through combat gas mask filters, plus phone, computer and electrical outlet feed-through, and perhaps a water trap coupling. The invention can keep a family of 1 to 10 (with a larger size) relatively isolated and safe from the harmful effects of a chemical biohazard, or nuclear fallout enemy attack for a matter of hours up to several days. The portal chamber can also connect together additional modules.

An oxidizing liquid (20), such as hydrogen peroxide, is vaporized (18) and the vapor is used to deactivate nerve gas, blistering gas, or other biologically active substances such as pathogens, biotoxins, and prions. A second chemical compound (42) in vapor, mist, or fog form is used in conjunction with the oxidizing vapor. In one embodiment, the second chemical preconditions the biologically active substances to be deactivated more efficiently by the oxidizing vapor. In another embodiment, the second chemical boosts the reactivity of the oxidizing vapor. In another embodiment, the other chemical reacts with the oxidizing vapor to form an intermediate compound that deactivates at least some of the biologically active substances.

This invention relates to a wet type centrifugal “filter less” air cleaner utilizing a labyrinth effect on the basis of spiral grooves for generating vortex flow, thus the separation of particular dust, mist can be absolutely, above 99.9% purified from air with the difference of specific gravity, 1:1000 between air and water under centrifugal force, 10000G-80000G after collecting pollution substances from air with an aqua viscosity of water mist. An wet type air cleaner utilizing a centrifugal impeller comprising: spiral grooves (416), a spin vaporizer (401) for large size, an ultra sonic vaporizer (482) for small size, an electric motor (433) with a centrifugal impeller 408, a drain trap (441) and humidity controller (442) installed on an exit pipe (432) etc. Therefore centrifugal wet type air cleaner make fresh air efficiently to be carried out by centrifugal force without using filters in the field of industrial cleanroom, hospital, asepsis laboratory, home appliances, military use for purifying poison gas, exhaust gas cleaner for automobiles and an industrial burner etc.

The invention relates to a method for preparing a bismuth-series chemical product, comprising steps as follows: firstly, preparing ordinary-level bismuth oxide by refined bismuth; then preparing a bismuth-series chemical product by the ordinary-level bismuth oxide including steps of refined bismuth pulverization, bismuth low-temperature oxidation, ordinary bismuth oxide chemical conversion, and the like; finally preparing bismuth-series chemical products of bismuth nitrate, bismuth subnitrate, bismuth subcarbonate, bismuthsalicylate, basic bismuth salicylate, bismuth citrate, bismuth trichlor, bismuth oxychloride, electric bismuth oxide or bismuth oxide nanowire, and the like; and recycling chemically-converted mother-liquid. The invention has the advantages of generating no cancerigenic poison gas NOx and waste water, having environment protection, little consumption of chemical reagent, little energy consumption, low cost, simple device and operation, and the like.

The invention provides a leaking gas diffusion forecasting method used for a three-dimensional space. By constructing a spatial three-dimensional coordinate system with the method, a leaking area and a surrounding area are expressed in the same coordinate system, other terrain and building distribution data are loaded in a computational domain of a fixed area in the coordinate system so as to conduct leaking gas diffusion simulation, on the basis, toxic gas diffusion forecasting outside the computational domain of the fixed area is carried out, so as to realize leaking gas diffusion concentration distribution forecasting of the surrounding area of a leaking source. The leaking gas diffusion forecasting method sufficiently considers geographic information then and there when carrying out the diffusion forecasting to the leaking gas, and can rapidly work out the range of a polluted area caused by one or multiple leaking sources and the toxic gas concentration in the polluted area.

The invention discloses a fire extinguishing agent, which is prepared from the following raw materials in parts by weight: 100 parts of ammonium polyphosphate, 15-20 parts of potassium sulphate, 15-20 parts of sodium bicarbonate, 5-10 parts of magnesium chloride, 5-10 parts of mica, 10-15 parts of silicone oil, 5-10 parts of activated clay, 5-8 parts of red phosphorus, 5-10 parts of zinc borate, 5-10 parts of antimonous oxide and 5-15 parts of white carbon black. The fire extinguishing agent is compounded by multiple components, thus, type-A fire, type-B fire, type-C fire and type-D fire can be extinguished at the same time. Moreover, a flame retardant component is left on an extinguished object after the fire is extinguished so as to avoid resurgence. As all the raw materials are environmental protection materials, the fire extinguishing agent disclosed by the invention has no toxin, smell, pollution or radiation, and harmful gas cannot be generated when the fire is extinguished. After the fire extinguishing agent is sprayed onto a burning object when the fire is extinguished, smoke can be eliminated and toxic gas can be adsorbed so as to prevent the condition that people are suffocated from occurring as possible.

The invention discloses a method for preparing a cellulose-based toxic gas adsorbing material. The method mainly comprises the following steps of: activating a natural cellulose material after dispersing, defibering and washing by utilizing a NaOH solution, and drying the natural cellulose material; adding water to wet the cellulose, arranging the wet cellulose in a microwave extraction reactor to carry out gelatinization for 1-5min, adding an initiator to initiate for 1-5min, adding a monomer to react for 2-15min to obtain a synthesized graft copolymerization product; and washing the synthesized graft copolymerization product in distilled water and drying at 60 DEG C for 10h to obtain the cellulose-based toxic gas adsorbing material. The cellulose-based toxic gas adsorbing material prepared by using the method disclosed by the invention has the advantages of high adsorption speed, large adsorption quantity, easiness in desorption, simpleness and convenience for regenerating and good chemical stability, is an ideal adsorption material for various organic gases, such as acidic toxic gas, formaldehyde and the like, and can be applied to indoor air purification, various sudden toxic gas leakage accidents and appliances for labor protection.

The invention discloses a mine protecting suit fabric with synergetic functions of bacteria resisting, static resisting, toxic gas monitoring and dust poison filtering and a preparation method thereof. The protecting suit material comprises a body protecting fabric, a sterilization protecting suit fabric and a gasochromic protecting suit fabric, wherein the body protecting fabric comprises a pieceof base cloth which is processed by MXene conductivity and an MXene filtering layer of which the surface comprises hydrophilic functional groups which can be reacted with mine toxic gas and a wear and static resisting hydrophobic layer, the body protecting fabric is taken as the body of a protecting suit, a function fabric which is modified by a dispersing agent and a silver nanowire sterilization agent is adopted by the parts of collar, sleeves and the like where bacteria are easily bred of the protecting suit, and therefore the bacteria can be effectively killed; an outer layer which has agasochromic protecting function is adopted by the sleeves so that mining workers can be warned because the color on a gasochromic layer is significantly changed when encountering mine toxic gas, and therefore mine operation safety is ensured.

The invention relates to nano, environment-friendly and inorganic expanding type tunnel fire retardant coating and the preparation method. The coating is prepared by taking water glass as the main raw material, and matching with aluminate cement, organic and inorganic foaming agent, stuffing, additives and nano TiO2 photocatalyst and the like. The invention adopts that the aluminate cement is added to the base coating to increase the cohesive force; zeolite is added to the intermediate coating to reduce the noise; the pH value of the water glass of a finish coating is reduced to 10, and the nano TiO2 is added to prevent the chemical reaction between the water glass and the nano TiO2. The tunnel fire retardant coating has the advantages that the coating can usually purify the air, reduce the noise, prevent the mildew and perform self cleaning, the coating complys with the environmental protection, the fire resistance limit is high, basically no smoke and no toxic gas is produced during fire, and the normal operation of the firemen can not be affected.

The invention proposes a method for planning an escape path in a toxic gas leakage state in a chemical industry park. A geographical coordinate of a leakage source point is obtained, a Cartesian coordinate system is established by using the leakage source as an original point, and a chemical industry park is transformed into a node network map; on the basis of an improved Gaussian diffusion model,a large-range harmful gas concentration after gas leakage is calculated; a method for calculating a safe area after toxic gas leakage is put forward based on a gas diffusion range and the national safety standard and an improved method for toxic load calculation is also put forward to realize quantification of the harm on the human body, and an optimal path to the safety area by evacuated peopleis planned by using the toxic load as a weight based on a Dijkstra's shortest path algorithm. According to the invention, proper safety shelters can be planned for people in different areas timely soas to avoid a crowding situation in the shelter. Moreover, the simple calculation method is provided, the operation speed is increased, and an optimal path to the shelter is found time based on quantification of the harm on the human body by the toxic gas.

A dipped activated carbon for preventing acidic toxic gas is prepared through proportionally mixing the solution of copper ammonium carbonate with carbonate of alkali metal, silver nitrate and ammonia water to obtain a liquid mixture, dipping activated carbon in it, and drying.

The invention discloses a phosphor-nitrogen halogen-free flame-retardant master batch used for engineering plastics, and a preparation method thereof. The phosphor-nitrogen halogen-free flame-retardant master batch used for the engineering plastics comprises components by mass: 70%-90% of a phosphor-nitrogen halogen-free flame retardant, 10%-20% of a carrier, 3%-5% of a dispersant and 1%-3% of a coupling agent. The prepared master batch has the characteristics of high concentration, low cost and convenient use. Due to the adoption of the phosphor-nitrogen halogen-free flame retardant, the master batch has the characteristics of small dosage, small influence on mechanical and electrical properties of a plastic matrix, good flame-retardant effect and excellent processing properties. By using the master batch to modify the flame retardance of the plastics, not only can production process be simplified, but also production efficiency can be increased; and the problems of non-uniform distribution and dust pollution possibly caused by directly adding the flame retardant can be prevented. The master batch provided by the invention also meets flame-retardant and environment-friendly requirements of efficiency, low smoke, halogen free and no poison gas release, fits a development trend of non-halogen, non-toxicity, no dust pollution and reduced cost for flame retardance of the plastics, and has wide market prospects.

The invention provides a person evacuation safety evaluation method in a toxic gas leakage accident. The method comprises steps of: carrying out simulation by using a leakage diffusion model to obtain the space concentration distribution of a toxic gas time series, namely a concentration field; simulating a person evacuation process along a predetermined evacuation path to obtain the spatial position of each evacuation individual at different time; computing the toxicity loads Pc of the evacuation individuals at the predetermined evacuation path; computing the death probabilities Pr of the evacuation individuals according to the toxicity loads Pc and the category of the toxic gas; acquiring the death rate Pd of the evacuation individuals according to the death probabilities Pr and then determining the person evacuation safety degree of predetermined evacuation path according to the death rate Pd of the evacuation individuals. The invention further provides a person evacuation safety area evaluation method in a toxic gas leakage accident and a person evacuation safety evaluation device and apparatus in a toxic gas leakage accident.

Disclosed is a method for achieving oxygen pressure acid leaching efficient beneficiation of gold and platinum group metal concentrate. The method comprises the steps that most of copper, nickel and iron and a little sulfur in secondary-cured copper-nickel alloy with rare and noble metals beneficiated through pyrometallurgy are removed by the use of a potential-controlled chlorination leaching method; copper and nickel recovery is conducted on filter liquid which is obtained after a chlorination residue is filtered, and a residue with beneficiated noble metal is desulfurized by the use of a sodium sulfite solution; impurities such as nickel, copper, iron and sulfur in a desulfurized residue which is obtained through filtering after desulfurization are further removed by the use of an oxygen pressure acid leaching method; pressure leaching liquid contains a little platinum and palladium, the platinum and the palladium in the pressure leaching liquid are processed by the use of QP-TU resin through exchange adsorption, and beneficiated platinum and palladium liquid enters the follow-up platinum refining and palladium refining working procedures; and nickel, copper and sulfur in a pressure leaching residue are almost removed, and the percentage content of the rare and noble metals is increased from 0.06% in the prior art to 25%-55%. The method is simple in technology and high in beneficiation ratio and recovery rate of the rare and noble metals, environmentally friendly, free of poison gas and exhaust gas and quite beneficial to follow-up separation and purification.

The invention relates to a high-displacement performance fireproof silicone sealant suitable for high-rise buildings and a preparation method of the high-displacement performance fireproof silicone sealant, and belongs to the field of fireproof silicone sealants. The high-displacement performance fireproof silicone sealant is prepared from the following components: alpha,omega-dihydroxy polydimethyl siloxane, polydimethyl siloxane, alkane-terminated polysiloxane, inorganic filler, ceramic powder, a silane crosslinking agent, a silane coupling agent and a first catalyst, wherein the alkane-terminated polysiloxane has a structure as shown, n is selected from 80-230, and x is an integer selected from 2-4. The prepared fireproof silicone sealant has stronger displacement capability, and is more suitable for application in sealing of high-rise and super high-rise buildings; moreover, the fireproof silicone sealant is ceramized into a hard shell after combustion is performed, and the shell does not melt or drip in a fire environment, so that a strong protective role in the fire is achieved; and therefore, the integrity of the buildings is not only maintained, damage, caused by burning down of the buildings, to people is avoided, spreading of poisonous gas and smoke after burning is conducted can also be avoided.

The invention relates to an environment-friendly fire-proof sealing material and a preparation method thereof, and belongs to the technical field of fire-proof sealing.The environment-friendly fire-proof sealing material is prepared from, by weight, 100-200 parts of polyhydric alcohols, 35-65 parts of liquid state fire retardant, 20-40 parts of expanded graphite, 25-50 parts of powder fire retardant, 1-4 parts of a foaming agent, 2-3 parts of an amino alcohol activating agent, 2-4 parts of a thermosensitive catalyst, 4-8 parts of pigment and 50-150 parts of polyisocyanates.The environment-friendly fire-proof sealing material has the advantages that distilled water is used as the polyurethane foaming agent, environment protection is achieved and pollution is avoided; the amino alcohol activating agent is adopted and releases a large amount of heat when reacts with the polyisocyanates so as to provide catalyst temperature needed by the thermosensitive catalyst, and influences of environment temperature on on-site construction are reduced; meanwhile, the environment-friendly fire-proof sealing material has excellent fire-proof performance, releases no halogen poison gas in the fire process, is expanded when encountering fire to prevent flame and smoke from spreading, personnel and property safety can be protected to the maximum degree, the product passes the authentication of national Ministry of Public Security fire product conformity assessment center (CCCF), and relevant performance parameters meet GB-23864 standard requirements.

The invention discloses a preparation method of a ferric oxide-doped mesoporous molecular sieve smoke suppressant. The method comprises the following steps of: introducing an iron precursor through ultrasonic dispersion and evaporative concentration by taking a mesoporous molecular sieve as a carrier; and performing high-temperature calcination to obtain the ferric oxide-doped mesoporous molecular sieve smoke suppressant. The smoke suppressant belongs to a nanocomposite material, and the mesoporous molecular sieve has a very large specific surface area and has high adsorption volume and selective adsorption effect on smoke toxic gases released in a flame retarding process; a doped active ingredient (ferric oxide) is dispersed into a mesoporous pore canal, is of nanoscale, and has a catalytic oxidation effect on smoke toxic gases; and the mesoporous molecular sieve can be used for keeping the stability of a framework in a high-temperature combustion process and keeping a carbon layer stable, and has high cooperative and synergistic flame retardance.

The invention discloses an environment-friendly fire extinguishing agent. The environment-friendly fire extinguishing agent is formed by mixing water and additive, wherein the mass percentage content of the additive is 10% to 15%; the additive comprises the following components in parts by weight: 5-10 parts of sodium dodecyl sulfate, 3-5 parts of hydrotalcite, 3-5 parts of powdered active carbon, 25-30 parts of sodium silicate, and 5-10 parts of magnesium chloride. The fire extinguishing agent provided by the invention can effectively block the fire from spreading, thereby providing a high fire extinguishing agent and saving the water supply volume; the fire extinguishing agent can retard flame effectively, thereby avoiding the after-combustion; due to the fact that all materials used in the fire extinguishing agent are environment-friendly materials, the fire extinguishing agent is nontoxic, inodorous, pollution-free and radiation-free, and is not likely to generate harmful gas in a fire extinguishing process; the fire extinguishing agent provided by the the invention can abate smoke and adsorb toxic gas after being sprayed on a burning object, so as to avoid the occurrence of a suffocating situation as far as possible.

The invention discloses a preparation method of 2-trifluoromethyl benzoic acid, which comprises the following steps of (1) allowing 2-trichloromethyl benzal chloride and anhydrous hydrogen fluoride to perform fluoridation under the condition of a catalyst, and obtaining 2-trifluoromethyl benzal chloride, and (2) allowing 2-trifluoromethyl benzal chloride to react with nitric acid, and obtaining a target compound, namely 2-trifluoromethyl benzoic acid after acid hydrolysis and oxidation reactions. The preparation method has the advantages that the catalyst adopts a low-toxicity and safe agent; other solvents are not required to be added to the fluoridation; an excessive hydrogen fluoride solution is utilized to help dissolution; the hydrolysis and oxidation reactions take nitric acid as a reaction agent, so that toxic gas and toxic substances generated after the reactions are reduced; and nitric acid utilized by hydrolysis and oxidation can be circulated for many times and recycled after fuming nitric acid with the calculated amount is added and a concentration of nitric acid is adjusted.

The invention provides an intelligent rescue suit with an embedded poisonous gas monitoring and warning function, which comprises a rescue suit body. The intelligent rescue suit is characterized in that a poisonous gas monitoring and warning device is embedded into the rescue suit body and comprises an information acquisition module used for sensing poisonous gas, a signal transmitted by the information acquisition module is acquired by a microprocessor, the microprocessor controls site warning equipment according to the acquired signal and transmits the acquired signal to a distal command center through a wireless sensor network communication module after processing the acquired signal, and the information acquisition module, the microprocessor, the site warning equipment and the wireless sensor network communication module are powered by a power management system. Compared with the prior art, the intelligent rescue suit has the advantage that the concentration of poisonous gas on a site with rescue team members can be monitored in real time, and site real-time displaying and warning are realized.

The invention discloses environmental-protection tin stripping liquid. The environmental-protection tin stripping liquid comprises the following components in percentage by weight: 5-50% of sulfuric acid, 1-20% of oxidizing agent, 1-20% of complexing agent, 1-20% of accelerating agent, 1-10% of surface active agent, and the balance of water. The environmental-protection tin stripping liquid can replace nitric acid for deplating and cleaning of electrotinning and chemical tin plating, reduces emission of nitrogen-contained waste water and emission of nitrogen monoxide and nitrogen dioxide poison gas due to use of nitric acid, and prevents potential safety hazards caused by use of nitric acid.

The invention discloses an iron substrate plating neutral stripping agent. Nitrate is optimally selected as an oxidizing agent for stripping nickel, chromium, copper, tin and other plating on an iron substrate, and as generally, nitrate is relatively stable in property and relatively low in toxicity, so that when the stripping agent provided by the invention is used, exhaust gases and waste water are not generated, and the stripping agent is non-corrosive to a device and highly friendly to the environment; at the same time nitrate is matched with citrate, potassium sodium tartrate and a proper amount of polyhydroxyl aldehyde, so that the speed for stripping the nickel plating on the iron substrate is effectively increased, the plating stripping is achieved in a short time, and the production cycle is shortened while the substrate is not damaged; and particularly, calcium nitrate is optimally as the oxidizing agent, and ammonium ferric citrate is adopted as a first complexing agent, and calcium nitrate and ammonium ferric citrate are combined with mannitol and sodium diacetate, so that the stripping rate of the nickel plating on the iron substrate can be effectively increased. Relative to the prior art, the stripping agent has the advantages of being free of corrosion, poisonous gases and pollution, high in efficiency, environment-friendly in use, easy and convenient to maintain, and the like.

The invention discloses a fluorescent probe for detection of a nerve gas simulacrum, fluorescent test paper and preparation methods of the fluorescent probe and the fluorescent test paper. The fluorescent probe for detection of the nerve gas simulacrum has a structural formula shown in the description, in the formula, R is located on an arbitrary substitution position of a benzene ring, and R is H, OCH3 or Cl. The fluorescent probe provided by the invention has fluorescence specificity on nerve gases such as halogenated phosphates, and can perform fluorescent lighting fluorescence sensing on the nerve gases, so that detection of the nerve gases can be realized, the detection sensitivity is high, and the detection limit is low; and the fluorescent test paper prepared from the fluorescent probe can be used to detect the halogenated phosphate nerve gases in a gas atmosphere, the detection method is simple, and the fluorescent test paper has low preparation costs and is convenient to carry.

The invention provides an air purification formula, an air filtering section and an air purification apparatus. The air purification formula comprises a salt or composite salt and the leaf, stem and flower of a plant. The invention also provides the air filtering section using the air purification formula and the air purification apparatus composed of the air filtering section. The invention has the beneficial effects that the formula may be used in three alternate states, i.e., a solid state, a liquid state and a gaseous state, so as to achieve the effects of absorption and reduction of poison gas and peculiar smell, elimination of haze and odor, creation of thick fog, biodegradation of heavily-contaminated environmental sewage and the like; and the formula is applicable to air purification, haze elimination, a biologically cycling and environment-friendly toilet, odor elimination in a wasteyard, odor elimination in a public washroom, a thick fog catalyst, etc.