306 results about "Perchlorate" patented technology

The use of volatilization reagents is disclosed for improved detection of inorganic oxidizers such as, but not limited to, chlorates and perchlorates. Detection methods are disclosed whereby a reagent can transfer a proton to the anion (i.e., chlorate, perchlorate, etc.) of an inorganic salt analyte, forming an acid (i.e., chloric acid, perchloric acid) that is easier to detect by a mechanism whereby the acidified reagent is more easily vaporized, and hence, more easily detected. Concurrently, the anion of the acid forms a new salt with the cation released from the salt that was acidified. The reagents can also include acidic salts or cation-donators, more generally. In some embodiments, hydrated reagents or co-reagents that can release water can be employed. In another aspect of the invention, a class of reagents including polmeric acids, polymeric organic acids and polymeric sulfonic acids are disclosed that can carry out this method. In various embodiments, these reagents can be embedded in a swipe or other substrate, delivered as a liquid infused via nebulizer, or otherwise introduced to a sample to be tested for the presence of a target analyte.

The invention relates to an ABC dry powder extinguishing agent. An extinguishing base material of the extinguishing agent is formed by nitrate (perchlorate) of <+2> valent or <+1> valent metal ions, or is formed by a mixture of the nitrate (perchlorate) with an imidazole compound; and the ABC dry powder extinguishing agent can be widely applied to extinguishing various combustible solids, liquid and gas fire disasters and can also be used for putting out electric fire disasters. Compared with an existing commonly-used ammonium phosphate ABC dry powder extinguishing agent, the ABC dry powder extinguishing agent has higher extinguishing efficiency.

Provided is an igniting powder composition which satisfies the current ignition sensitivity required for the igniting powder to be used in igniters that are actuated by an electric signal and which exhibits reduced friction sensitivity. An igniting powder composition for igniters, characterized by being prepared by blending together (A) a metal hydride, (B) at least one kind of metal powder selected from the group consisting of tungsten powder, molybdenum powder, aluminum powder, titanium powder and magnesium powder, and (C) a perchloric acid salt.

The invention provides a methane substrate biomembrane reactor and a process for removing perchlorate from drinking water. The reactor comprises a casing and a hollow fiber membrane assembly, wherein the top end of the casing is provided with a flange cover; the casing is outwards provided with a gas inlet; methane is introduced through the gas inlet; the casing is inwards provided with a fixedly connected membrane assembly fixing element; the hollow fiber membrane assembly is arranged inside the casing and consists of a hollow fiber membrane tow and a membrane assembly sealing head; the hollow fiber membrane tow is in a shape that a U-shaped opening is upward, and an end opening is fixedly connected onto the membrane assembly sealing head through epoxy resin adhesives; the sealing head of the hollow fiber membrane assembly is connected and fastened with a membrane assembly element arranged at the inner end of the flange cover arranged at the top end through screw threads, and is communicated with the gas inlet. The methane substrate biomembrane reactor is used; the operation is performed according to a continuous flow mode; the methane is used as an electric supply and a carbon source; the methane utilization rate can be effectively improved; the enriching domestication of reducing system microbes for oxidatively coupling anaerobic methane with high-perchlorate is shortened; the fast, efficient and safe removal of perchlorate in the drinking water is realized.

The invention consists of a water treatment process using selective and regenerable weak base anion exchange resins to remove any number of complex anions, especially oxyanions including perchlorate, nitrate, chlorate, arsenate, selenate, and chromate, from aqueous solutions. The treatment process is comprised of three key processes including 1) pretreatment to lower pH, 2) ion exchange, and 3) post treatment to adjust pH and alkalinity. The invention also includes processes for regenerating weak base anion resins and treatment of the residuals generated. This invention employs pressurized treatment, carbon dioxide management, and reuse of regenerating solution to minimize pumping and treatment costs.

The invention discloses a preparation method of antibacterial cellulose fibers. The preparation method comprises the following steps: a) after mixing a dispersant, an antibacterial agent and cellulose, dissolving a mixture in an ionic liquid water solution to prepare a mixed spinning raw solution, wherein the adding amount of the antibacterial agent is 0.1 to 1 weight percent of the cellulose; andb) filtering the mixed spinning raw solution, spinning, condensing, stretching, washing with water, bleaching, applying oil and drying to obtain the antibacterial cellulose fibers. The ionic liquid is obtained by mixing 1-butyl-3-methylimidazolium chloride, bi1,4-di[1-(3-methylimidazolium)]butyl dichloride and bi1,4-di[1-(3-methylimidazolium)]butyl diperchlorate. An experiment shows that the antibacterial cellulose fibers prepared by the invention have excellent mechanical property, antibacterial property and stability property; and a preparation process is simple, is low in cost, is environmentally friendly and has no pollution.

The invention discloses a preparation method of a flame-retardant cellulosic fiber. The preparation method comprises the following steps: a) mixing a flame retardant and cellulose to obtain a mixture,and then dissolving the mixture in an aqueous solution of an ionic liquid to prepare a mixed spinning stock solution; b) filtering the stock solution of the step a), performing spinning, solidification, stretching, water washing, bleaching, oiling and drying to obtain the flame-retardant cellulose fiber; wherein the ionic liquid is prepared by mixing 1-butyl-3-methylimidazolium chloride, bi-1,4-bis [1-(3-methylimidazolyl)] butyl dichloride and bi-1,4-bis[1-(3-methylimidazolyl) butyl diperchlorate. Experiments show that the flame-retardant cellulosic fiber prepared by the method has excellentmechanical properties, flame retardancy and stability, simple preparation process and low cost, does not need any organic solvent, is environment-friendly and pollution-free, does not need special equipment and harsh conditions, is easy to realize industrial production and has extremely high practical value.

Systems and methods for removing perchlorate load off of ion exchange resins are disclosed. The systems and methods rely upon direct contact between the resin and a liquid product formed by the culturing of perchlorate-destroying microorganisms. These methods can be incorporated into methods for removing perchlorate from aqueous streams. A resin product comprising an anion exchange resin with a coating of perchlorate-destroying microorganisms on its surface is also disclosed.