167 results about "Nitroguanidine" patented technology

A gas generating composition is obtained in which an amount of a combustion residue based on a unit amount of a gas generated is reduced.A gas generating composition comprising nitroguanidine, guanidine nitrate or a mixture thereof as a fuel and further an oxidizing agent. The oxidizing agent is a perchloric acid salt, a nitric acid salt or a mixture thereof, and when the oxidizing agent is ammonium perchlorate, a chlorine neutralizer is further incorporated.

A two-part metal protection composition includes: an aqueous metal treatment conversion coating component that includes an admixture of an acid and a coating forming component; and an aqueous protective coating component that is applied over metal treated with the aqueous metal treatment conversion coating component and includes an admixture of a blister suppressing agent and an organic film forming protective component. The aqueous metal treatment conversion coating component may contain an accelerator, such as hydroxylamine. In a preferred embodiment, the blister suppressing agent is an organic oxidizing agent that includes one or more of nitroguanidine; aromatic nitrosulfonates, Naphthol Yellow S; and picric acid (trinitrophenol). A method for treating a metallic surface includes: (a) applying an aqueous metal treatment conversion coating component described above; and (b) applying an aqueous protective coating component, described above, to the surface that has at least been partially treated with the aqueous metal treatment conversion coating component. A method for bonding an elastomeric substrate surface to a metallic substrate surface includes: (a) applying an aqueous metal treatment conversion coating component, described above, to the surface; (b) applying an aqueous coating or primer composition, described above, to the surface that has at least been partially treated with the aqueous metal treatment conversion coating component; and (c) applying an adhesive overcoat to effect bonding of the metallic substrate to the elastomeric substrate.

The present invention provides a process for producing a gas generating agent capable of constantly producing a gas generating agent with a high quality. The process for producing a gas generating agent comprises the first step of feeding nitroguanidine, a basic copper nitrate and guar gum and stirring and mixing them in the presence of moisture, the second step of extrusion-molding and cutting the mixture, and the third step of drying it.

The invention relates to a clothianidin antigen, an antibody and an application thereof, and belongs to the technical field of immunochemistry analysis. The clothianidin antigen and the antibody of the invention are specially used for clothianidin specific polyclonal antibody preparation, enzyme-linked immunoassay (ELISA), and high-sensitivity and rapid detection of clothianidin residues in environment and agricultural products. A hapten is synthesized by substituting a chlorine atom on a thiazole ring of clothianidin, has a chemical name of 3-(5-((3-methyl-2-nitroguanidine)-yl methyl)thiazole-2-mercapto)propionic acid, and is coupled with bovine serum albumin and ovalbumin to prepare an antigen and an envelope antigen. Newzealand white rabbit is immunized by the immunizing antigen to obtain the specific polyclonal antibody of clothianidin. The established ELISA linear scope is 1.1 microgram/L-2 mg/L, and the detection limit is 1.1 microgram/L. The hapten synthetic technology of the invention is simple and feasible, high in antibody specificity, and suitable for detection and on-site monitoring of mass samples in environment and agricultural products.

The invention discloses a method for synthesizing 5- normal-butyl-2- ethide amid-6- methyl pyrimidine-4-based dimethyl amine group sulfonic ester (bupirimate). The method takes nitroguanidine and 2-acetyl group ethyl caproate as raw materials which react under the catalytic action of sodium alcoholate to generate 5- normal-butyl-2-nitryl amine-6- methyl pyrimidine-4- phenol which reacts with ethylamine under catalytic action of Glacial acetic acid; and bupirimate is obtained by the reaction of the 5- normal-butyl-2-nitryl amine-6- methyl pyrimidine-4- phenol and N, N-Dimethylsulfamoyl chloride in the presence of alkalescence. The bupirimate prepared by the synthesizing method has the purity quotient up to 95.4 percent, and the total yield coefficient up to 78.6 percent. The method is mainly used to prepare the bupirimate.

The preparation process of 2-nitro imido imidazolyl alkane belongs to the field of farm chemical intermediate preparing technology. It includes the first reaction between acid and ethylene diamine to obtain ethylene diamine salt, the subsequent reaction between ethylene diamine salt and nitroguanidine, and final filtering and stoving to obtain the 2-nitro imido imidazolyl alkane product. The present invention has the advantages of low material cost, high reaction yield up to 80 % and high product quality, and the product has smelting point of 232-234 deg.c and 2-nitro imido imidazolyl alkane content over 99 %, and is white or yellowish crystal.

The invention discloses methyl nitroguanidine and a preparation method thereof. Alkyl nitroguanidine is produced by the reaction of nitroguanidine, alkylamine and water under the condition of taking vitriol as a catalyst. The processing equipment is simple in structure and convenient to operate and has high reaction yield after taking the vitriol as the catalyst, little pollution and high product purity of over 98 percent generally.

The invention relates to a method for preparing nitroguanidine by adopting a micro-channel reactor, belonging to the technical field of organic synthesis applications. The mehtod is a new process for synthesizing nitroguanidine by taking a sulfuric acid solution of guanidine sulfate and nitric acid as raw materials and performing nitrification and dehydration in the Corning micro-channel reactor within a short reaction time from tens of seconds to a few minutes. Materials are introduced into the Corning micro-channel reactor through a metering pump, a nitroguanidine product is obtained by preheating, mixing, reaction and post-treatment, and the method has the advantages of simplicity, convenience and safety in operation, high yield and continuous production of the nitroguanidine product; and in addition, by adopting the process, the environmental pollution can be greatly reduced. The yield of the product according to the method disclosed by the invention is 90-93%, and the melting point of the product is 230-232 DEG C.

The invention discloses a method for synthesizing imidacloprid employing cascade reaction. The method comprises the following steps: with 2-chlorine-5-chloromethyl pyridine, ethidene diamine and guanidine nitrate as raw materials, mixing 2-chlorine-5-chloromethyl pyridine, ethidene diamine and guanidine nitrate with a certain amount of solvent ethanol; adding a little of ionic liquid as a catalyst, controlling the pH value of the reaction process to be about 6 with a little of hydrochloric acid; heating, warming, and slowly dropwise adding a certain amount of ethidene diamine, reacting, heating for a certain period of time, stopping heating, and cooling to a room temperature; and purifying and drying to obtain an imidacloprid product. Due to adoption of one-pot cascade reaction, an intermediate product 2-degree amine is high in activity, and easily forms a heterocyclic ring together with nitroguanidine; byproducts can be prevented; and the high-purity imidacloprid is synthesized. Compared with an original two-step technology, the method for preparing the imidacloprid disclosed by the invention is simple in reaction step; the yield and the purity of the product are greatly improved; the yield reaches more than or equal to 95%; the purity of a reaction product through gas chromatography reaches more than or equal to 90%.

The invention discloses a method for acidizing and dewatering guanidine nitrate to prepare nitroguanidine in a continuous flow micro-channel reactor, belongs to the technical field of organic synthesis application, and is a new technology of taking guanidine nitrate water solution and concentrated sulfuric acid as materials in the continuous flow micro-channel reactor, and synthesizing the nitroguanidine within the reaction time from dozens of seconds to a few minutes. The materials are led to the continuous flow micro-channel reactor through a metering pump, and the dewatered product nitroguanidine is finally obtained by pre-heating, mixing, and reacting. The method is simple and safe to operate; high-yield continuous production of the nitroguanidine becomes possible; the technology is small in environmental pollution; the yield of the product disclosed by the invention is 80-85%; and the melting point is 230-232 DEG C.

The invention discloses a method for preparing a disubstituted 4-aminocarbazole compound. The method comprises the steps of with a 3-nitroguanidine compound and a 2-(1-arylethylidene)malononitrile compound as the raw materials and acetonitrile as a solvent, reacting at 50 DEG C for 6-24 hours in a nitrogen protection system, so as to synthesize a target compound. The synthetic method is simple, efficient, relatively high in yield and mild in conditions and has good application prospects.

Provided is a gas generating agent with a low combustion temperature and good ignition ability. The gas generating agent includes: (a) a fuel; (b) an oxidizing agent including a basic metal nitrate; (c) a basic metal carbonate; and (d) a binder (not including a component selected from starch, etherified starch, methyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, guar gum, etherified guar gum, tamarind gum, poly(vinyl alcohol), polyvinyl ether, polyacrylamide, polyethylene oxide, and polyvinyl pyrrolidone). The fuel of the component (a) includes melamine cyanurate (MC) and nitroguanidine (NQ), with MC/NQ (ratio of contents) of being within a range of 0.20 to 1.50.

Provided are a Hyphomicrobium sp. mutant strain SWB-P91 (KCTC12695BP) having high productivity of pyrroloquinoline quinone, and a method of producing a Hyphomicrobium sp. mutant strain SWB-P91 (KCTC12695BP), which includes inducing mutation by treating a Hyphomicrobium sp. parent strain with N-methyl-N′-nitro-N-nitroguanidine (NTG) and UV rays, and culturing the mutant strain in a medium and selecting a mutant strain with high productivity of pyrroloquinoline quinone. Also, provided is a method of mass-producing pyrroloquinoline quinone, which includes culturing a Hyphomicrobium sp. mutant strain, SWB-P91 (KCTC12695BP), adsorbing pyrroloquinoline quinone in a fermenting culture solution from the fermenting culture solution using an adsorption resin, detaching the adsorbed pyrroloquinoline quinone with an eluent; and recovering pyrroloquinoline quinone by vacuum-evaporating the detached pyrroloquinoline quinone solution.

The invention relates to a process for continuously preparing superfine nitroguanidine. The process comprises the following steps of: adding nitroguanidine and deionized water into a dissolving kettle in a ratio of 1:7, heating the nitroguanidine and deionized water to reach a reflux state, and performing refluxing to completely dissolve the nitroguanidine; filtering a nitroguanidine solution to remove mechanical impurities, and adding the filtered solution into a nitroguanidine refining kettle; mixing the refined nitroguanidine and cooling water, controlling the ratio of the nitroguanidine to the water to be 1:4-1:7, adding a mixture into a crystallizer, and thus obtaining the superfine nitroguanidine with the particle size range of 2 to 6 micrometers; and performing centrifugal dewatering, washing, drying, water content and acidity regulating, and packaging on the crystallized superfine nitroguanidine to obtain a finished superfine nitroguanidine product.

The invention relates to a continuous synthetic method of nitroguanidine. The method comprises the steps that guanidine nitrate and concentrated sulfuric acid are used as raw materials to respectively flow into a reaction kettle formed by serially connecting three reaction kettles with openings formed in the side surfaces according to a molar ratio of 1: 2, by controlling the material flow rate, the temperature of each synthetic kettle and the material reaction retention time, and feeding reaction is continuously carried out by virtue of the overflow of materials after the reaction, wherein the content of a finished product is 98.0 percent to 98.5 percent, and the comprehensive yield is 85 percent to 95 percent. By adopting the method for continuously synthesizing the nitroguanidine, the content and yield of the product are remarkably increased, the problems that an additional device is needed in a conventional intermittent reaction and leakage appears in a transferring process can be avoided, the operation intensity is greatly alleviated, and the production efficiency is greatly improved.