141 results about "Chlorate salt" patented technology

The invention discloses a preparation method of modified micron zero-valent iron and an application method of the modified micron zero-valent iron in remediation of heavy metal contaminated soil. The preparation method of the modified micron zero-valent iron comprises the steps of cleaning of iron raw materials, preparation of micro iron, ultrafine grinding and modifying treatment. A modifying agent composed of water, xanthan gum, sulfide, a stabilizing agent, zeolite and blast furnace slag is adopted in the step of modifying treatment. The preparation method of the modified micron zero-valent iron has the beneficial effects that the production process of the modified micron zero-valent iron is simple, and the effect similar or superior to micron zero-valent iron is achieved while the cost is reduced; and in addition, the reaction activity is controlled, the oxidation rate is decreased, excellent stability is obtained, and the acting time of the micron zero-valent iron is longer. By the adoption of the application method of the modified micron zero-valent iron, the remediation cost of heavy metal contaminated underground water is further reduced. According to the preparation method of the modified micron zero-valent iron and the application method of the modified micron zero-valent iron in remediation of heavy metal contaminated soil, organic fertilizer is added in the soil treatment process so that the fertility of soil can be improved, the structure of soil can be improved through humic acid produced by the organic fertilizer, heavy metal elements, such as lead, chromium and arsenic, in underground water can be removed, and the concentration of pollutants such as nitrate and perchlorate can be reduced.

Compositions comprising at least one decontaminating agent, and being in a form of a gel, are disclosed herein, as well as processes for producing the compositions by contacting a solution containing the decontaminating agent(s) with at least one gelling agent. The compositions are useful in decontamination. The decontamination efficacy of the compositions can be enhanced by adding a solid hypochlorite salt to the composition. Systems are further disclosed herein which are designed for mixing the decontaminating agent(s) with the gelling agent(s) when and where needed, and for propelling the mixed solutions onto a surface to be contaminated. Methods employing the compositions for decontamination are also disclosed.

The present invention relates to a nitrate salt-based process for preparing a graphite oxide. The invention nitrate salt-based process employs starting materials comprising a sulfuric acid, an inorganic nitrate salt, an amount of water, a first amount of chlorate salt, and a graphite.

The invention discloses a method for preparing micro-pore firework powder capable with improved the fire ignition and transfer properties, which comprises the following steps of: firstly, dissolving materials, emulsifying, foaming, balling, then removing a solvent, separating the materials, and finally, drying; when the materials are dissolved, emulsified and foamed, adding a water solution of a sensitizing agent; and adding a water solution containing a sensitizing agent and a dispersing agent as a dispersion medium in the balling process, wherein the concentration of the water solutions of the sensitizing agents is the same. The used sensitizing agents can adopt the nitrate, the perchlorate or the mixture thereof of alkali metal or alkali earth metal, and the addition proportion is 0.2 to 10 percent of the mass of raw powder. The sensitizing agents are added in the forming process of the micro-pore firework powder by the form of the water solutions, an extra procedure is not added, a forming medium is recycled in the technological process, environmental pollution and material wastage can not be caused, the distribution of the sensitizing agents in an obtained sample of a finished product is more uniform, and the ignition capability and the normal-pressure fire transfer speed are both enhanced obviously.

An efficient cyclic process and related compositions for the in-situ generation of chlorine dioxide from dilute solutions of chlorite anions at near neutral pH. The cyclic process provides a means of safe and effective use of chlorine dioxide with reduced concern of chlorite accumulation in the aqueous system. The disclosed chemistry used to support the cyclic process can be applied independently or in various combinations that are effectively inert. This dramatically reduces safety concerns since the chlorine dioxide is produced in-situ to the application and in dilute concentrations. Also, the process allows for regeneration of inert anions such as bromide and chlorite thereby reducing operating cost.

The invention discloses modified active carbon. The surface of the modified active carbon has a quaternary ammonium salt structure (N-Q) and a naphthyridine structure (N-6), wherein the quaternary ammonium salt structure and the naphthyridine structure are obtained through oxidation, ammoniation and methylation treatment and follow-up treatment to the surface of active carbon. The invention further discloses a preparation method of modified active carbon correspondingly. The preparation method comprises the steps: active carbon is subject to nitric acid oxidation treatment, ammonia ammoniation treatment and then methylation treatment to obtain modified active carbon. The invention further discloses the application of modified active carbon used removing perchlorate in drinking water. The modified active carbon has the advantages of high adsorption capacity, zero pollution, and low cost.

The invention provides a special gold dissolving agent for a gold ore. The special gold dissolving agent is prepared by reacting and mixing carbonate or bicarbonate, hydroxide, permanganate, perchlorate, persulphate, ammonium salt, sodium ferrocyanide or potassium ferrocyanide. The gold dissolving agent has the advantages of rapidly dissolving metal gold, selectively leaching gold from various gold ores, being low in toxicity and the like.

The invention discloses a preparation method of a filtering medium for removing perchlorate in water, which comprises the following steps: (a) mixing raw materials containing ultrahigh molecular weight polyethylene, activated carbon, zeolite powder and gas generation agent, wherein the weight ratio of the ultrahigh molecular weight polyethylene, the activated carbon, the zeolite Powder and the gas generation agent is 100-300:150-300:50-100:50-100; and (b) pressing, sintering and cooling the mixture obtained in the step (a). The filtering medium prepared by the method and used for removing perchlorate in water has over 95 percent of removal and has simple method, low cost and quick effect.

An ignition medicine with chlorate oxygen column and its production are disclosed. The ignition medicine consists of sodium chlorate 30~50% with grain size 60~300 meshes, lithium hyperchlorate or sodium perchlorate 10~30% with grain size 60~300 meshes, barium dioxide 0.1~6% with grain size 80~200 meshes, metal oxide ironic oxide or cuprous oxide 5~9% with grain size 20~200 meshes, metal powders 15~25% with grain size 100~300 meshes and cobalt salt 5~15% with grain size 40~200 meshes. It has shorter gas-take time and higher starting success probability of engine.

Provided is a method for removing perchlorate in water. Magnetic resin can adsorb and concentrate perchlorate in water rapidly, perchlorate reducing bacteria can reduce perchlorate biologically into harmless chloride ions, and the two effects are combined, so that the magnetic resin is loaded with biological film, and bio-magnetic resin capable of conducting adsorption and bio-regeneration simultaneously is formed to concentrate perchlorate from big-size water to small-size biological resin; meanwhile, the magnetic resin is utilized to adsorb organic matter in water, so that the perchlorate reducing bacteria loaded on the magnetic resin have sufficient carbon source to biologically reduce the concentrated perchlorate into harmless chloride ions. According to the method, the resin adsorption method and the biological reduction method are combined, harmlessness of perchlorate and regeneration of resin adsorbent are simultaneously achieved, and the final effective removal rate of perchlorate reaches over 95%; meanwhile, the method has the advantages of short response time, high treatment efficiency, repeated use and the like, and has high practical value for advanced treatment of water.

Propellant compositions are provided herein for use in small arms cartridges. Such propellant compositions include from about 70 to about 90% by weight of a cellulose-based organic fuel, from about 5 to about 30% by weight of a non-azide, nitrogen-containing primary organic oxidizer and from about 0.5 to about 10.0% by weight of a secondary nitrate, perchlorate, chlorate of peroxide oxidizer. Preferably, such compositions are in the form of extruded shaped hollow cylindrical grains having a length in the range of 0.030 to 0.200 inch, a diameter in the range 0.040 to 0.070 inch, and having a coaxial opening there through having a wall grain thickness in the range 0.008 to 0.016 inch. Ignition grains are also provided for use alone or in a mixture with the propellant compositions. When used in a small caliber firearm or muzzleloader, the temperature of combustion is at a level that ensures substantially complete combustion of the fuel during firing so that the products of combustion are mostly gaseous.

The invention discloses a disinfectant containing the component of chlorine dioxide. The disinfectant is a water solution configured by chlorite and trichloro isocyanuric acid at the weight ration of 1:0.5 to 1:1.5. The concentration of the chlorite in the water solution is 0.1 percent to 10 percent. The configuring method is carried out as steps that: a. the chlorite is made into a solution with concentration of 0.1 percent to 10 percent; b. the trichloro isocyanuric acid is added into the chlorite solution and then agitated; c. the compound solution of the chlorine dioxide and the dichlord isocyanurice acid is generated.

The invention relates to a method for removing perchlorate in drinking water, which belongs to the technical field of water treatment and comprises the following steps that: (1) absorbing agents are added into polluted water containing ClO4<->; (2) the water is added into a stirring device or a shaker for carrying out absorption reaction; and (3) after the absorption is completed, the absorbing agents in the water is stopped for separation treatment. The roasted lamellar metallic oxides can be used for fast and efficiently removing perchlorate ions contained in tap water factory produced water and deionized water containing the perchlorate ions, so the water quality standard of the drinking water is reached, and in addition, the absorbed roasted lamellar compounds can be regenerated.

The invention provides a chlorate decomposing device, and belongs to the field of chlorate decomposing equipment. The technical scheme is that the device comprises a decomposition tank, a stirring mechanism and an air blowing mechanism; the stirring mechanism and the air blowing mechanism are arranged in the decomposition tank; the decomposition tank comprises a cylindrical tank body and a top cover; an annular mounting plate is arranged on the inner side of the top cover, a plurality of supporting legs are arranged on the outer wall of the tank body, a feeding pipe and an exhaust pipe are arranged on the tank body, and a bottom cleaning assembly and a discharging pipe are arranged at the bottom of the tank body; a circular mounting hole is formed in the center of the top cover, a motor base is arranged in the mounting hole, a driving motor is arranged on the motor base, the end part of a motor shaft of the driving motor penetrates through the top cover and is provided with a rotating shaft, and a stirring mechanism and an air blowing mechanism are arranged on the rotating shaft. The invention has the beneficial effects that through multi-dimensional stirring, the air blowing mechanism is arranged to stir raw materials through air blowing, and meanwhile, the raw materials precipitated at the bottom of the decomposition tank can be blown, so the stirring efficiency is further improved, the stirring effect is improved, and the decomposition efficiency is improved.

A chrome-free corrosion inhibitor composition includes: titanium chloride; a stabilizer including a mixture of hydrogen peroxide and at least a compound selected from nitric acid, persulfate, nitrate, and chlorate; and a film-forming enhancer selected from monosaccharide, oligosaccharide, polysaccharide, derivatives of saccharide, and combinations thereof.

The invention provides a preparation method of a filtering medium for removing high chlorate in drinking water. The preparation method comprises the following steps: a), mixing ultra-high molecular weight polyethylene powder, activated carbon powder, water talcum powder, attapulgite mountain flour and a pore forming agent so as to obtain a mixture, wherein the weight ratio of the ultra-high molecular weight polyethylene powder to the activated carbon powder to the water talcum powder to the attapulgite mountain flour to the pore forming agent is (100-300): (50-60): (50-100):(50-100): (50-100); b) pressing, sintering and cooling the mixture obtained in the step a) in a mold. Under the synergistic effect of the raw materials, the prepared filtering medium is high in removal rate of high chlorate in water, simple in method, applicable to drinking water polluted by high chlorate, simple and convenient to use and low in cost, damage of high chlorate to human bodies is avoided, and in addition, as a filter element rather than powder is adopted, the filtering medium needs no later treatment and is applicable to domestic terminal drinking water treatment.

An oxidant for dyeing of a sulfide dye comprises components of sodium chlorate, sodium vanadate or ammonium vanadate, sodium chloride and water for adjusting concentration. The part of weight of each component is that sodium chlorate 10-80 parts, sodium vanadate or ammonium vanadate 0.5-10 parts, sodium chloride 1-60 parts, the remaining part is water, wherein the use environment of the oxidant is that a dye vat of a jig dyeing machine contains 0.5-4% (o.w.f) of oxidant, 98% of acetic acid or 30% of sulfuric acid 1-6% (o.w.f) and four to six paths (note: the distance of one path is from one end of a roll of dye cloth to the other end of the roll of dye cloth in the dye vat), and temperature is 60-65DEG C. The oxidant for dyeing of the sulfide dye selects chlorate with low price to serve as an oxidation treatment agent, solves the problem of serious environment pollution caused by traditional sodium dichromate oxidation treatment, color fastness and hydrophilism are good, convenient conditions are provided for treatment after dyeing, repeated water washing and multiple soaping and color toning are not needed after oxidation treatment, and the problems of cloth surface sour, rough touch and dark color and light are solved.