32 results about "Guanidine nitrate" patented technology

The invention relates to the technical field of guanidine nitrate preparation, in particular to a method for preparing guanidine nitrate by a continuous dynamic tubular reaction process, which comprises the following steps: uniformly mixing dicyandiamide, target ammonium nitrate and target ammonium carbonate according to a mass ratio of 1: (1-3): (1-0.5); conveying the uniformly mixed material to a feeding section in a dynamic tubular reactor through a first conveying screw rod for mixing treatment, wherein the dynamic tubular reactor further comprises a heating section, a reaction section and a cooling section; sequentially conveying the target mixed material to a heating section for heating melting treatment, a reaction section for synthesis reaction treatment and a cooling section for cooling forming treatment through a second conveying screw rod to obtain an initial product; conveying the initial product into a cooling and crushing device for cooling and slicing to obtain a target guanidine nitrate product. According to the method disclosed by the invention, the mass and heat transfer efficiency can be improved, the online quantity and liquid holdup of the material are reduced, meanwhile, the raw material ratio and the reaction path are optimized, and the safety and the product purity are improved.

A method of forming a gas generant according to various implementations includes the steps of providing a mixture of copper nitrate and water and adding melamine and guanidine carbonate to the copper nitrate and water mixture at room temperature. Next, the melamine, guanidine carbonate, copper nitrate, and water mixture is mixed and heated to form a melamine nitrate, guanidine nitrate, basic copper nitrate, and water mixture. The heating and mixing step may be performed at a temperature in the range of 50° C. to 60° C. for at least 20 minutes. Then, the melamine nitrate, guanidine nitrate, basic copper nitrate, and water mixture is dried to form the gas generant comprising melamine nitrate, guanidine nitrate, and basic copper nitrate. The method may further comprise a step of adding an additional fuel, an additional oxidizer, or an additive. Also disclosed is a gas generant made by the method described above.

The invention discloses a u-shaped automatic lifesaving device capable of popping up an inflatable cushion. A life buoy belongs to the technical field of life-saving equipment and comprises a life buoy body, an emergency mechanism is arranged in an inner cavity of the life buoy body, and by arranging the emergency mechanism, rescue workers remotely control the life buoy body to move to the position near people falling into water, and then an electric push rod is started; an electric push rod is started to drive an iron ball on the surface of a push rod to move to the surface of a second electric wire through an opening, the second electric wire is connected at the moment, the resistance wire between the first electric wire and a second motor generates high temperature, the high temperature instantly gasifies solid guanidine nitrate wrapping the resistance wire, and guanidine nitrate can generate a large amount of gas; at the moment, air enters the safety air bag through the connecting pipe, the safety air bag is rapidly inflated, the person falling into water can hold the safety air bag to be rescued, the safety air bag can be rapidly opened to hold the person falling into water, rapid emergency treatment of rescue of the person falling into water is achieved, and the rescue capacity is improved.

The invention relates to the technical field of pharmaceutical analysis, in particular to a method for detecting the content of guanidine nitrate by precolumn derivatization-high performance liquid chromatography, which comprises the following steps: oscillating and uniformly mixing a guanidine nitrate reference substance or sample and pure water at room temperature, adding sulfuric acid concentrated liquor in cold water bath to perform derivatization reaction, after the reaction is finished, placing at room temperature, and performing column chromatography to obtain the guanidine nitrate content. Adding liquid caustic soda for neutralization, carrying out gradient constant volume by using a mobile phase, and filtering by using a microporous filter membrane to respectively obtain a derivatization reference solution and a derivatization sample solution; and respectively injecting the derivatization reference substance solution and the derivatization sample solution into HPLC, recording peak areas, and calculating the content of guanidine nitrate in the sample by adopting an external standard method. The guanidine nitrate sample is pretreated through the precolumn derivatization reaction, the guanidine nitrate derivative generated through the reaction has the advantages of being high in stability and easy to separate, ammonium nitrate and nitric acid impurities can be effectively prevented from interfering the detection result, the explosive picric acid is not adopted in the detection method, and the detection method is simple, safe and easy to implement.

A gas generating agent composition for a gas generating agent is provided, the gas generating agent composition containing guanidine nitrate, basic copper nitrate, and potassium perchlorate. In the gas generating agent composition, the content of potassium perchlorate is 12 parts by weight or more per 100 parts by weight of the total content of guanidine nitrate, basic copper nitrate, and potassium perchlorate. The gas generating agent composition further contains an amorphous oxide.

The invention belongs to the technical field of disinfection and sterilization of medical systems, and provides a visible light photocatalytic disinfectant for pathogenic bacteria attached to aerosol in an emergency room as well as a preparation method and application of the visible light photocatalytic disinfectant. Comprising composite nanoparticles of guanidine nitrate C3N4 and deionized water. Nonmetal guanidine nitrate and a C3N4-based photocatalyst are compounded, the specific antibacterial and bacteriostatic activity of guanidyl functional groups is effectively utilized, ecological risks caused by a metal-based photocatalyst are avoided, the photocatalyst is utilized to generate high reactive oxygen species (ROS), the substance metabolism process of microorganisms is persistently interfered, and the photocatalytic activity of the metal-based photocatalyst is improved. Propagation limitation and apoptosis of pathogenic bacteria are caused, and growth of beneficial bacteria is not inhibited. The disinfectant nano-particles with the photocatalytic function are convenient to apply in the form of a spray, can be directly used for disinfecting and killing by using indoor visible light resources, show a remarkable inhibition effect on pathogenic bacteria carried by aerosol particles in air in emergency wards and in four seasons, can also be sprayed on the surface of medical equipment, and can be applied to the medical equipment. And the breeding of pathogenic bacteria and the transmission of viruses can be reduced.

The invention relates to the field of chemical synthesis, and particularly discloses a production method of 1, 2-dinitroguanidine, which is characterized in that ammonium nitrate, guanidine nitrate, concentrated sulfuric acid and concentrated nitric acid are used as raw materials, and continuous production of the 1, 2-dinitroguanidine is realized through the steps of synthetic reaction, nitration reaction, ice hydrolysis, filtration and neutralization, pulping, dissolution and filtration, cooling crystallization, centrifugation and the like. The production method is adjusted and optimized, the production cost is reduced, and through the continuous and informationized production method, the labor intensity is reduced, the reaction time is shortened, and the production efficiency is improved.

The invention discloses a method for realizing continuous synthesis and crystallization control of nitroguanidine by using a continuous flow multi-stage stirring reactor. The method comprises the following steps: weighing perfluorinated sulfonic acid resin, placing the perfluorinated sulfonic acid resin in a catalyst cage, and mounting the catalyst cage in the continuous flow multi-stage stirring reactor; setting the temperature of a reaction section to be 20-50 DEG C and the temperature of a crystallization section to be-20-10 DEG C; introducing concentrated sulfuric acid in advance to fill an internal channel of the continuous flow multi-stage stirring reactor; guanidine nitrate and concentrated sulfuric acid are premixed and then introduced into the reactor, and the retention time of a reaction section is 0.5-10 min; water is introduced into the crystallization section, and the standing time in the crystallization section is 1-30 min; and collecting a reaction product solution, washing with cold water, and filtering. The continuous synthesis of the nitroguanidine prepared by the sulfuric acid method is realized, the mass and heat transfer efficiency is greatly improved, the reaction time is greatly shortened, the product yield is greatly improved, and the maximum yield of the nitroguanidine is 98%.

Provided are a gas generant composition, a preparation method, and a gas generator containing the composition. The gas generant composition includes components having the following contents, in percent by mass: 40% to 60% of guanidine nitrate, 25% to 50% of basic copper nitrate, 0% to 7% of ammonium perchlorate, 1% to 10% of a slag-forming agent, and 0.05% to 5% of a release agent / lubricant, the slag-forming agent is used as a form-retaining agent, so that the tablets can retain their form before combustion very well after combustion, thereby completely avoiding burning of an inflatable bag due to melting and splashing of the combusted tablets. Moreover, ammonium perchlorate is used as auxiliary oxidizers, thereby reducing the amount of basic cupric nitrate used and reducing molten copper residues. The gas generant composition is mainly used in a gas generator for vehicle airbag.

The invention provides a guanidine nitrate nonlinear optical crystal and a preparation method and application thereof, and belongs to the technical field of crystal materials and the technical field of optics. The chemical formula of the guanidine nitrate nonlinear optical crystal is C (NH2) 3NO3, the guanidine nitrate nonlinear optical crystal belongs to a monoclinic system, the space group is Cm, and the cell parameters are as follows: a is equal to 12.69 + / -0.02, b is equal to 7.27 + / -0.02, c is equal to 3.63 + / -0.02, alpha is equal to 90 degrees, beta is equal to 120.85 + / -0.02 degrees, gamma is equal to 90 degrees, and Z is equal to 2.

The invention provides a gas generating agent, a preparation process, a gas generator and a safety airbag. The gas generating agent comprises 30-55 parts of main fuel; 20 to 60 parts of an oxidant; 0.5 to 5 parts of a catalyst; 1-5 parts of a slag former; wherein the main fuel is selected from guanylurea copper nitrate or a combination of guanylurea copper nitrate and guanidine nitrate; when the main fuel is the combination of guanylurea copper nitrate and guanidine nitrate, the mass fraction of the guanylurea copper nitrate is greater than that of the guanidine nitrate; the combustion temperature of the gas generating agent provided by the invention is 1600-1800K, and the explosion heat value of the gas generating agent is 2000-2400J / g; after the tablet is combusted, the form and morphology before combustion can be well kept, the use amount of guanidine nitrate is remarkably reduced, the cost is saved, molten copper residues formed after the gas generating agent is combusted and decomposed are greatly reduced, and the combustion speed is increased while the low-temperature ignition performance of the composition is improved.

A gas generant composition for passive inflatable restraint systems (e.g., airbags) for automobiles is provided that comprises a melamine oxalate compound. The gas generant may be a cool burning gas generant composition that comprises a melamine oxalate compound, a co-fuel, such as guanidine nitrate, and an oxidizer, such as basic copper nitrate. The gas generant composition has advantageous combustion properties, including a maximum flame temperature at combustion (Tc) of ≤about 1700K (1,427° C.), a linear burn rate of ≥about 18 mm per second at a pressure of about 10 megapascals (MPa), a gas yield of the gas generant composition of ≥about 5.7 moles / 100 cm3, and a linear burn rate pressure exponent of ≤about 0.35.

The invention discloses a method for realizing one-step continuous synthesis and crystallization control of nitroguanidine by acoustic resonance enhancement, which comprises the following steps of: 1, purging the interior of a whole reactor by using inert gas, and introducing concentrated nitric acid and the inert gas in advance; 2, starting an acoustic resonance reaction platform, and adjusting the resonance frequency and the acceleration of the acoustic resonance reaction platform; 3, guanidine nitrate and nitric acid are premixed and then introduced into the continuous reactor, and meanwhile inert gas is controlled to be introduced into the continuous reactor; and 4, collecting a reaction product, washing with cold water, and filtering. According to the method, the mass transfer and heat transfer efficiency is greatly improved, the reaction time is greatly shortened, the product yield is greatly improved, and the highest yield of nitroguanidine is 98%; by adjusting the resonant frequency and the acceleration, the granularity of the product can be accurately controlled, and the granularity requirement of the industry is met.

Gas generating composition for use in safety devices for vehicles, with a gas yield of at least 85%, the composition consisting of 75 to 98 wt% guanidine nitrate as fuel, 2 to 25 wt.% of a combustion accelerator selected from the group of transition metal compounds, metal nitrates, metal chlorates, metal perchlorates, ammonium perchlorate and mixtures thereof, wherein the transition metal compounds are selected from the compounds of the transition metals Ti, Cr, Mn, Fe, Cu, Zn, Zr and Mo and have an average grain size of at most 5 µm and a specific surface area of ​​at least 1 m 2 / g, 0 to 5 wt.% combustion moderators and / or coolants, and 0 to 3 wt.% processing aids from the group of flow aids, pressing aids and lubricants, each based on the total composition, and wherein the gas generating composition has a burning rate of 3 to 17 mm / s at 20 MPa.

The invention relates to the technical field of preparation of fine chemical intermediates, in particular to a method for preparing nitroguanidine by a continuous static tubular reaction process, which comprises the following steps: pumping a sulfuric acid solution in a batching tank into a static tubular reactor; the guanidine nitrate in the feeding hopper is pushed to a static tubular reactor through a solid feeder installed at an output port of the feeding hopper, and the mass ratio of the sulfuric acid solution to the guanidine nitrate is controlled to be 1.0: (1.0-5.0); uniformly mixing a sulfuric acid solution and guanidine nitrate through a high-shear pump, and conveying the mixture to a reaction section of the static tubular reactor for reaction; conveying a reaction product into a hydrolysis kettle, and sequentially carrying out hydrolysis and preliminary cooling treatment; and conveying the initial product into a crystallization mechanism for cooling crystallization, and carrying out filtering centrifugal treatment and drying treatment to obtain a target nitroguanidine product. According to the method, high-efficiency, safe and continuous nitroguanidine production is realized, and the purity and quality of the target product nitroguanidine are also effectively improved.

A method of forming a fuel mixture for a gas generating composition according to various implementations comprises the step of providing a mixture of melamine and water and adding nitric acid to the mixture to form melamine nitrate. Guanidine carbonate is mixed in to form guanidine nitrate. The guanidine carbonate mixing step may be performed at room temperature for at least 10 minutes. The melamine nitrate and guanidine nitrate form a solid precipitate fuel mixture which is filtered and rinsed with water. The rinsed fuel mixture is then dried. The drying step may be performed at a temperature in the range of 100° C. to 110° C. The nitric acid may be added as an aqueous solution having a molarity of 0.1 to 0.25. Also disclosed is a gas generating composition for use in airbag gas generators comprising the melamine nitrate and guanidine nitrate fuel mixture.

The present invention provides a compound, calcium guanidine nitrate, and a birefringent calcium guanidine nitrate crystal, as well as a preparation method and use thereof. The chemical formula of the compound is [C(NH2)3]2Ca(NO3)4(H2O)2, the molecular weight is 444.33, and the compound is prepared by a solvent thermal method. The crystal chemical formula is [C(NH2)3]2Ca(NO3)4(H2O)2, the molecular weight is 444.33, and the crystal belongs to the monoclinic system with a space group of C 2 / c , the unit cell parameters are a =20.319(3)Å, b =6.5717(8)Å, c =14.2195(16)Å, α =90°, β =116.399(5)°, c =90°, the unit cell volume is 1700.8(4)Å 3 , with a transmittance range of 281-1600 nm and a birefringence index between 0.152 (1064 nm) and 0.23 (281 nm). Grown using a room-temperature aqueous solution method, the resulting birefringent crystals possess moderate mechanical hardness, are easily cut, polished, and stored, and are easy to grow under simple growth conditions. They are insoluble in water, non-deliquescent, and stable in air. They exhibit a wide transmittance range and birefringence, and can be used to fabricate polarization beam splitters, phase delay devices, and electro-optical modulators.

The invention provides a high-yield synthesis method of trimethoprim, which comprises the following steps: (a) adding 3-methoxypropionitrile and 3, 4, 5-trimethoxybenzaldehyde into an organic alcohol alkali-organic alcohol solution, heating to 30-45 DEG C, and carrying out condensation reaction; (b) directly decompressing the condensation product obtained in the step (a) to remove most organic alcohol, then adding an alcohol ether solvent and guanidine nitrate, heating to 70-80 DEG C, and reacting until the reaction is finished; and cooling to 0-5 DEG C to obtain a trimethoprim crude product. The trimethoprim with high yield can be obtained only by using a one-pot method without treating an intermediate, so that the process is simple, and the working procedure and the working hour are saved; alcohol ether is used as a solvent in the ring closing step, so that the yield is further improved.

The invention relates to a pyrotechnic solid substance for generating gas, a pyrotechnic composition and a gas generator, comprising an effective composition, the effective composition comprising, by weight, 40%-50% of guanidine nitrate, 6%-48% of basic copper nitrate, 1%-5% of alumina and 5%-15% of at least one coolant prepared from hydrated oxalate, and the pyrotechnic solid substance does not contain a binder component. The pyrotechnic solid substance has the beneficial effects that the pyrotechnic solid substance capable of generating gas, which is composed of the effective compositions, has the characteristics of high gas production rate, high combustion rate, low combustion temperature, low pressure index, small toxicity of released gas and the like, and is particularly suitable for an in-vehicle safety airbag as a passenger protection system.

The present disclosure provides a gas-generating agent composition, a gas-generating agent, and a preparation method and the use. The gas-generating agent composition comprises the following components, in percentages by mass: 30-70% of guanidine nitrate, 20-60% of basic copper nitrate, 0-10% of basic copper carbonate, 1-10% of ammonium perchlorate and 1-15% of a slag-forming agent, wherein the slag-forming agent comprises a first component and a second component, the first component being selected from aluminum hydroxide, and the second component being selected from at least one of a zirconate and a silicate.

The utility model relates to the technical field of cooling rollers, and discloses a guanidine nitrate cooling roller which comprises a cooling roller body, I-shaped blocks are fixedly installed on the front outer wall and the rear outer wall of the cooling roller body respectively, sliding sleeves are arranged on the outer sides of the I-shaped blocks in a sleeved mode, and portal frames are fixedly installed at the four corners of each sliding sleeve respectively. The outer side of the middle of the cooling roller is sleeved with a gear ring, and the gear ring is fixedly connected with the sliding sleeve. Through the arrangement of the sliding sleeve, the insertion block and the I-shaped block, if an assembling position or a driving assembly is changed, and the driving teeth cannot be meshed, the handle can be held, the electromagnet is started, the electromagnet and the sliding block are temporarily attracted and positioned, the insertion block is separated from the insertion groove, force is applied to push the gear ring along the I-shaped block, and the gear ring is meshed with the external driving teeth; according to the structural design, the original position of the gear ring can be changed according to the change of an assembly component in the later period, the applicability is high, and meanwhile, compared with welding, the gear ring structure is convenient to replace.

A gas-generating agent composition containing guanidine nitrate, basic copper nitrate, and potassium perchlorate, the gas-generating agent composition having a potassium perchlorate content of 12 parts by weight or more when the total content of guanidine nitrate, basic copper nitrate, and potassium perchlorate is 100 parts by weight, and the gas-generating agent composition containing guanidine nitrate, basic copper nitrate, and potassium perchlorate. The gas-generating agent composition further contains an amorphous oxide.

The present invention is used in the technical field of organic synthesis, and discloses a method for preparing 2-amino-4,6-dichloro-5-formamidopyrimidine, wherein malonic acid ester and guanidine hydrochloride or guanidine nitrate are used as raw materials, and 2-amino-4,6-dihydroxy-5-nitrosopyrimidine is prepared through cyclization reaction and nitrosation reaction, and 2-amino-4,6-dichloro-5-formamidopyrimidine is prepared through chlorination, selective hydrogenation reduction and formylation reaction. Through the route scheme of first chlorination and then reduction, the yield of the chlorination reaction is improved, the last continuous hydrolysis step is avoided, and the total yield is increased to 66.8%. In addition, the raw materials are simple, and the product competitiveness is improved.

The invention provides a compound guanidine calcium nitrate, a guanidine calcium nitrate birefringent crystal and a preparation method and application, the chemical formula of the compound is [C (NH2) 3] 2Ca (NO3) 4 (H2O) 2, the molecular weight is 444.33, the compound is prepared by a solvothermal method, the chemical formula of the crystal is [C (NH2) 3] 2Ca (NO3) 4 (H2O) 2, the molecular weight is 444.33, the crystal belongs to a monoclinic system, the space group is C2 / c, the cell parameters are as follows: a = 20.319 (3), b = 6.5717 (8), c = 14.2195 (16), alpha = 90 degrees, beta = 116.399 (5) degrees, gamma = 90 degrees, and the unit cell volume is 1700.8 (4) 3. The light transmission range of the optical fiber is 281-1600 nm, and the birefringence of the optical fiber is 0.152 (1064 nm)-0.23 (281 nm). The crystal is grown by adopting a room-temperature aqueous solution method, and the obtained birefringent crystal is moderate in mechanical hardness, easy to cut, polish and store, simple in growth condition and easy to grow; the product is insoluble in water, does not deliquesce, and is stable in air; the transparent range and the birefringence are relatively large; the method can be used for manufacturing polarization beam splitting prisms, phase delay devices and electro-optical modulation devices.

A filtering device for guanidine nitrate production belongs to the field of devices for guanidine nitrate production and comprises a filtering unit, a collecting unit and a stirring unit, the collecting unit is fixed at the lower end of the filtering unit, and the stirring unit is rotatably connected in the filtering unit. The problems that in the background technology, an existing guanidine nitrate filter needs to be detached after being used and then is cleaned, time and labor are wasted, and the cleaning is not convenient enough are solved.

The invention relates to the technical field of new energy automobile batteries, in particular to a new energy automobile battery heat dissipation device.A fire extinguishing assembly comprises a material box fixed in a heat dissipation bin, sliding grooves are formed in the top and the bottom of the material box, a supporting frame is slidably connected to the interior of the material box along the sliding grooves, and a first air bag is fixed in the supporting frame; the material box is slidably connected with an ejector rod, a conventional magnet is fixed to the end, located outside the material box, of the ejector rod, and in the fire extinguishing state, the second wheel repeatedly rubs with the first wheel to generate high temperature when rotating highly, and the high temperature is transmitted into the material box through a hollow pipe to rapidly preheat guanidine nitrate; according to the preheating purpose, guanidine nitrate can be rapidly heated, oxidized and reduced to generate nitrogen in the battery cell bin, oxygen in air is diluted or exhausted through the nitrogen in the two air bags and the nitrogen generated through guanidine nitrate oxidation and reduction, so that the concentration of oxygen around a battery fire source is reduced, oxygen needed by combustion is insufficient, and flames are extinguished.

The invention relates to a preparation method of 2-aminobenzimidazole, and belongs to the technical field of compound synthesis. The preparation method comprises the following steps: adding water into a reactor, adding o-phenylenediamine, and uniformly dispersing; slowly adding guanidine salt, uniformly dispersing, and controlling the temperature of the system in the feeding process to be not higher than 70 DEG C; and adding alkali liquor to adjust the pH value of the system to be alkalescent, then heating and carrying out a heat preservation reaction, and after the reaction is finished, carrying out post-treatment to obtain the 2-aminobenzimidazole product. The guanidine salt is at least one of guanidine hydrochloride, guanidine sulfate and guanidine nitrate. The molar ratio of the o-phenylenediamine to the guanidine salt is 1: (1.1-1.5). When the o-phenylenediamine and the guanidine salt react, the reaction temperature is 60-90 DEG C, and the reaction time is 6-10 hours. The preparation method has the advantages of cheap and easily available raw materials, high conversion rate, high atom utilization rate and better industrial application prospect.

The present application relates to a kind of 2-amino benzimidazole preparation method, belong to compound synthesis technical field.The preparation method is: in reactor, water is added, and o-phenylenediamine is uniformly dispersed;Then slowly add guanidine salt and uniformly dispersed, control the temperature of system during feeding process not higher than 70 DEG C;Add lye to adjust the pH of system to weak alkaline, then heat and keep warm reaction, after reaction is finished, 2-amino benzimidazole product is obtained after post-processing.The guanidine salt is at least one of guanidine hydrochloride, guanidine sulfate, guanidine nitrate.The molar ratio of o-phenylenediamine used and guanidine salt is 1: (1.1-1.5).When the o-phenylenediamine and guanidine salt react, the reaction temperature is 60-90 DEG C, and the reaction time is 6-10h.The raw material of the preparation method is cheap and easy to obtain, conversion rate is high, atom utilization rate is high, and has better industrial application prospect.

The invention relates to the technical field of energetic materials, and discloses a guanidino formamide nitrate metal ion complex and a preparation method thereof.The preparation method of the guanidino formamide nitrate metal ion complex comprises the following steps that dicyandiamide and water are mixed and heated, nitric acid is dropwise added, stirring is continued after dropwise adding is completed, and a mixture is obtained; reducing the temperature to room temperature to obtain a guanidinecarboxamide nitrate solution; adding carbonate of R into an acid guanidino formamide solution, heating, and continuously reacting; after the reaction is finished, filtering while hot; the guanidino formamide nitrate metal ion complex has the advantages that the burning rate and the gas production efficiency are higher, the sensitivity is low, and the stability is good; the preparation method of the guanidino formamide nitrate metal ion complex is simple in process, mild in condition, easy to prepare, safe and stable in raw material, small in danger and low in equipment requirement.

According to various implementations, there is provided a method of forming a fuel mixture for a gas generating composition, comprising the steps of providing a mixture of melamine and water, adding nitric acid to the mixture to form melamine nitrate, mixing guanidine carbonate therein to form guanidine nitrate. The guanidine carbonate mixing step may be performed at room temperature for at least 10 minutes. Melamine nitrate and guanidine nitrate form a solid precipitated fuel mixture, which is filtered and flushed with water, and then the flushed fuel mixture is dried. The drying step may be performed at a temperature in the range of 100 DEG C to 110 DEG C. The nitric acid may be added in the form of an aqueous solution having a molar concentration of 0.1 to 0.25. Also disclosed is a gas generating composition for an airbag gas generator comprising a melamine nitrate and guanidine nitrate fuel mixture.